From 32f1d07323db257db31fead024271d3a57d72b49 Mon Sep 17 00:00:00 2001
From: Servo WPT Sync <32481905+servo-wpt-sync@users.noreply.github.com>
Date: Sun, 25 Feb 2024 01:16:30 -0500
Subject: [PATCH] Update web-platform-tests to revision
 b'a39b23cb150d1ca3eddf7f2097ffe792a5f911e5' (#31425)

---
 .../floats/float-no-interpolation.html.ini    |   36 +
 .../margin-collapse-clear-001.xht.ini         |    2 +
 .../margin-collapse-clear-007.xht.ini         |    2 +
 .../margin-left-applies-to-008.xht.ini        |    2 +
 .../padding-applies-to-016.xht.ini            |    2 +
 .../padding-applies-to-017.xht.ini            |    2 +
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 .../selectors/first-line-pseudo-008.xht.ini   |    2 +
 .../selectors/first-line-selector-004.xht.ini |    2 +
 ...dth-interpolation-math-functions.html.ini} |   50 +-
 .../color-computed-relative-color.html.ini    |   48 +
 .../color-valid-relative-color.html.ini       |   48 +
 ...ust-interpolation-math-functions.html.ini} |   50 +-
 ...tch-interpolation-math-functions.html.ini} |   50 +-
 ...polation-math-functions-tentative.html.ini |  216 +
 .../position-interpolation.html.ini           |   72 +
 ...cell-overflow-explicit-height-001.html.ini |    2 +
 ...cell-overflow-explicit-height-002.html.ini |    2 +
 .../text-align-last-interpolation.html.ini    |   72 -
 .../all-with-discrete.tentative.html.ini      |   12 -
 ...on-from-ua-to-blocking-stylesheet.html.ini |    2 -
 .../transition-behaivor.html.ini              |   18 +
 .../user-find-computed.tentative.html.ini     |    6 -
 .../user-find-valid.tentative.html.ini        |    6 -
 .../css/css-ui/user-find.tentative.html.ini   |    3 -
 ...riables-animation-math-functions.html.ini} |   38 +-
 .../backdrop-filter-clip-rect-2.html.ini      |    2 +
 .../nodes/Document-createEvent.https.html.ini |    9 +
 ...ertion-removing-steps-iframe.window.js.ini |    3 +
 ...ertion-removing-steps-script.window.js.ini |    2 +
 .../observable-constructor.any.js.ini         |    6 +
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 .../tentative/observable-map.window.js.ini    |    3 +
 .../tentative/observable-take.any.js.ini      |   32 +
 .../tentative/observable-takeUntil.any.js.ini |   18 +
 .../gamepad/gamepad-secure-context.html.ini   |    9 -
 ...window.js.ini => idlharness.window.js.ini} |   20 +-
 .../gamepad/not-fully-active.html.ini}        |    2 +-
 .../load-pageshow-events-window-open.html.ini |    3 -
 ...url-return-value-handling-dynamic.html.ini |   15 -
 .../replace-before-load/a-click.html.ini      |    0
 ...ir-auto-dynamic-simple-dataChange.html.ini |    2 +
 .../dir-auto-dynamic-simple-replace.html.ini  |    2 +
 ...r-auto-dynamic-simple-textContent.html.ini |    2 +
 ...nitiator-is-not-opener.https.window.js.ini |    1 -
 .../unicode-bidi-ua-rules.html.ini            |   12 +
 .../no-cuechange-before-play.html.ini         |    4 +-
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 ...rame_sandbox_popups_nonescaping-1.html.ini |    2 +-
 ...pover-shadow-dom-anchor.tentative.html.ini |    6 +
 .../defer-script/async-script.html.ini        |    4 +
 .../parsing/DOMContentLoaded-defer.html.ini   |    3 -
 .../ignore-opens-during-unload.window.js.ini  |    3 +-
 ...nested-context-navigations-iframe.html.ini |   11 +-
 .../test_resource_timing.html.ini             |    3 -
 .../uievents/textInput/api.html.ini           |   24 +
 .../018.html.ini                              |    0
 tests/wpt/meta/MANIFEST.json                  | 3507 ++++++++++++++---
 .../floats/float-no-interpolation.html.ini    |   36 +
 .../counter-increment-auto-reset-001.xht.ini  |    2 +
 .../counter-increment-display-001.xht.ini     |    2 +
 ...ounter-increment-not-generated-001.xht.ini |    2 +
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 .../padding-applies-to-017.xht.ini            |    2 +
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 .../selectors/first-line-selector-004.xht.ini |    2 +
 ...dth-interpolation-math-functions.html.ini} |   50 +-
 .../color-computed-relative-color.html.ini    |   48 +
 .../color-valid-relative-color.html.ini       |   48 +
 ...ust-interpolation-math-functions.html.ini} |   50 +-
 ...tch-interpolation-math-functions.html.ini} |   50 +-
 ...polation-math-functions-tentative.html.ini |  216 +
 .../position-interpolation.html.ini           |   72 +
 .../text-align-last-interpolation.html.ini    |   72 -
 .../text-justify-interpolation.html.ini       |  138 -
 ...text-transform-full-size-kana-001.html.ini |    2 -
 ...text-transform-full-size-kana-002.html.ini |    2 -
 ...text-transform-full-size-kana-003.html.ini |    2 -
 ...text-transform-full-size-kana-004.html.ini |    2 -
 .../all-with-discrete.tentative.html.ini      |   12 -
 .../vertical-align-interpolation.html.ini     |   72 -
 .../transition-behaivor.html.ini              |   18 +
 .../user-find-computed.tentative.html.ini     |    6 -
 .../user-find-valid.tentative.html.ini        |    6 -
 .../css/css-ui/user-find.tentative.html.ini   |    3 -
 ...riables-animation-math-functions.html.ini} |   38 +-
 .../backdrop-filter-clip-rect-2.html.ini      |    2 +
 .../nodes/Document-createEvent.https.html.ini |    9 +
 ...ertion-removing-steps-iframe.window.js.ini |    3 +
 ...ertion-removing-steps-script.window.js.ini |    2 +
 .../observable-constructor.any.js.ini         |    6 +
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 .../tentative/observable-map.any.js.ini       |   38 +
 .../tentative/observable-map.window.js.ini    |    3 +
 .../tentative/observable-take.any.js.ini      |   32 +
 .../tentative/observable-takeUntil.any.js.ini |   18 +
 .../css-images.sub.tentative.html.ini         |    3 +
 .../gamepad/gamepad-secure-context.html.ini   |    9 -
 ...window.js.ini => idlharness.window.js.ini} |   20 +-
 .../gamepad/not-fully-active.html.ini}        |    2 +-
 .../javascript-url-referrer.window.js.ini     |    4 +
 .../traverse_the_history_5.html.ini           |    3 -
 ...ir-auto-dynamic-simple-dataChange.html.ini |    2 +
 .../dir-auto-dynamic-simple-replace.html.ini  |    2 +
 ...r-auto-dynamic-simple-textContent.html.ini |    2 +
 .../supported-elements.html.ini               |    5 +-
 .../unicode-bidi-ua-rules.html.ini            |  258 ++
 .../no-cuechange-before-play.html.ini         |    4 +-
 .../iframe_sandbox_popups_escaping-3.html.ini |    3 +-
 .../html/semantics/forms/historical.html.ini  |    0
 ...pover-shadow-dom-anchor.tentative.html.ini |    6 +
 .../wpt/meta/uievents/textInput/api.html.ini  |   24 +
 .../webmessaging/without-ports/017.html.ini   |    4 +
 .../workers/WorkerGlobalScope-close.html.ini  |    4 -
 .../tests/IndexedDB/idbobjectstore_add.any.js |   30 +
 .../tests/IndexedDB/idbobjectstore_add.htm    |   35 -
 .../IndexedDB/idbobjectstore_add10.any.js     |   24 +
 .../tests/IndexedDB/idbobjectstore_add10.htm  |   29 -
 .../IndexedDB/idbobjectstore_add11.any.js     |   24 +
 .../tests/IndexedDB/idbobjectstore_add11.htm  |   29 -
 .../IndexedDB/idbobjectstore_add12.any.js     |   24 +
 .../tests/IndexedDB/idbobjectstore_add12.htm  |   29 -
 .../IndexedDB/idbobjectstore_add13.any.js     |   24 +
 .../tests/IndexedDB/idbobjectstore_add13.htm  |   29 -
 .../IndexedDB/idbobjectstore_add14.any.js     |   27 +
 .../tests/IndexedDB/idbobjectstore_add14.htm  |   32 -
 .../IndexedDB/idbobjectstore_add15.any.js     |   26 +
 .../tests/IndexedDB/idbobjectstore_add15.htm  |   31 -
 .../IndexedDB/idbobjectstore_add16.any.js     |   21 +
 .../tests/IndexedDB/idbobjectstore_add16.htm  |   25 -
 .../IndexedDB/idbobjectstore_add2.any.js      |   31 +
 .../tests/IndexedDB/idbobjectstore_add2.htm   |   36 -
 .../IndexedDB/idbobjectstore_add3.any.js      |   34 +
 .../tests/IndexedDB/idbobjectstore_add3.htm   |   39 -
 .../IndexedDB/idbobjectstore_add4.any.js      |   35 +
 .../tests/IndexedDB/idbobjectstore_add4.htm   |   40 -
 .../IndexedDB/idbobjectstore_add5.any.js      |   29 +
 .../tests/IndexedDB/idbobjectstore_add5.htm   |   34 -
 .../IndexedDB/idbobjectstore_add6.any.js      |   42 +
 .../tests/IndexedDB/idbobjectstore_add6.htm   |   47 -
 .../IndexedDB/idbobjectstore_add7.any.js      |   42 +
 .../tests/IndexedDB/idbobjectstore_add7.htm   |   47 -
 .../IndexedDB/idbobjectstore_add8.any.js      |   42 +
 .../tests/IndexedDB/idbobjectstore_add8.htm   |   47 -
 .../IndexedDB/idbobjectstore_add9.any.js      |   22 +
 .../tests/IndexedDB/idbobjectstore_add9.htm   |   27 -
 ...orker-termination-aborts-upgrade.window.js |   71 +
 .../derive_bits_keys/cfrg_curves_bits.js      |    6 +-
 .../tests/WebCryptoAPI/sign_verify/eddsa.js   |   22 +
 .../WebCryptoAPI/sign_verify/eddsa_vectors.js |  141 +-
 .../async-svg-script-removal.https.html       |   61 -
 .../async-write-svg-read-svg.https.html       |   60 -
 .../constructor-required-fields.html          |  235 +-
 .../resources/test-helpers.js                 |   27 +-
 ...rd-party-cookies-cross-site-embedder.html} |   19 +-
 ...party-cookies-cross-site-popup-opener.html |   51 +
 ...party-cookies-cross-site-popup-verify.html |   38 +
 .../third-party-cookies-cross-site-popup.html |   30 +
 ...rty-cookie-heuristics.tentative.https.html |   47 +
 .../third-party-cookies.tentative.https.html  |    2 +-
 .../fedcm-button-mode-basics.https.html       |   33 +
 .../support/fedcm/manifest_with_rp_mode.json  |    6 +
 .../support/fedcm/token_with_rp_mode.py       |   12 +
 .../CSS2/borders/border-left-width-078.xht    |    1 +
 .../cascade-import/cascade-import-001.xht     |    1 +
 .../css/CSS2/css1/c541-word-sp-001-ref.xht    |    1 -
 .../tests/css/CSS2/css1/c541-word-sp-001.xht  |    6 +-
 .../CSS2/floats/float-no-interpolation.html   |   15 +
 .../tests/css/CSS2/fonts/font-size-119.xht    |    1 +
 .../linebox/vertical-align-baseline-006.xht   |    1 +
 .../linebox/vertical-align-baseline-010.xht   |    1 +
 .../counter-increment-auto-reset-001.xht      |    1 +
 .../lists/counter-increment-display-001.xht   |    1 +
 .../counter-increment-not-generated-001.xht   |    1 +
 .../CSS2/lists/counter-reset-display-001.xht  |    1 +
 .../lists/counter-reset-not-generated-001.xht |    1 +
 .../margin-collapse-012.xht                   |    1 +
 .../margin-collapse-clear-001.xht             |    1 +
 .../margin-collapse-clear-007.xht             |    1 +
 .../margin-left-applies-to-008.xht            |    1 +
 .../padding-applies-to-016.xht                |    1 +
 .../padding-applies-to-017.xht                |    1 +
 .../block-non-replaced-width-002.xht          |    1 +
 .../css/CSS2/normal-flow/max-width-014.xht    |    1 +
 .../css/CSS2/normal-flow/min-width-014.xht    |    1 +
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 .../CSS2/syntax/character-encoding-036.xht    |    1 +
 .../CSS2/syntax/character-encoding-037.xht    |    1 +
 .../anchor-position-circular.html             |   37 +
 .../anchor-scroll-chained-001.tentative.html  |   55 +
 .../anchor-scroll-chained-002.tentative.html  |   66 +
 .../anchor-scroll-chained-003.tentative.html  |   68 +
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 ...hor-scroll-chained-fallback.tentative.html |   65 +
 .../anchor-scroll-fixedpos-002.html           |   39 +
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 ...-adjust-interpolation-math-functions.html} |    3 +-
 ...stretch-interpolation-math-functions.html} |    3 +-
 ...gistry-maplike-tampered-Map-prototype.html |   38 +-
 .../css-highlight-api/historical.window.js    |    7 +
 ...nterpolation-math-functions-tentative.html |   59 +
 .../clip-path-interpolation-discrete.html     |  124 +
 ...-oof-in-multicol-with-oof-in-multicol.html |   15 +
 .../animations/position-interpolation.html    |   29 +
 .../positioned-target-iframe.html             |   73 +
 .../prefer-targeted-element-iframe.html       |   53 +
 .../prefer-targeted-element-positioned.html   |   70 +
 .../prefer-targeted-element.html              |   99 +
 .../resources/common.js                       |   28 +-
 .../scrollbar-color-dynamic-8-ref.html        |   12 +
 .../scrollbar-color-dynamic-8.tentative.html  |   29 +
 ...ble-cell-overflow-explicit-height-001.html |   22 +
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 .../all-with-discrete.tentative.html          |   41 -
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 .../parsing/user-find-invalid.tentative.html  |   20 -
 .../parsing/user-find-valid.tentative.html    |   18 -
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 .../pseudo-get-computed-style.html            |   90 +-
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 ...-rotate-interpolation-math-functions.html} |    4 +-
 ...ay-angle-interpolation-math-functions.html |   47 +
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 .../dom/events/scrolling/scroll_support.js    |   11 +-
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 .../insertion-removing-steps-iframe.window.js |  147 +
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 .../tentative/observable-take.any.js          |  108 +
 .../tentative/observable-takeUntil.any.js     |  130 +-
 ...ction-range-cross-shadow-dom-boundary.html |   22 +
 .../editing/include/editor-test-utils.js      |   10 +-
 .../delete-in-shadow-hosted-in-body.html      |   81 +
 .../notify-event-iframe.https.html            |  102 +
 .../notify-event-invalid.https.html           |   96 +
 ...tify-event-nested-fenced-frames.https.html |   41 +
 .../notify-event-success.https.html           |   55 +
 ...event-transient-user-activation.https.html |   53 +
 .../wpt/tests/fenced-frame/resources/utils.js |   16 +
 .../tests/gamepad/gamepad-secure-context.html |   25 -
 ...s.https.window.js => idlharness.window.js} |    0
 ...ctive.https.html => not-fully-active.html} |    0
 tests/wpt/tests/generic-sensor/README.md      |   40 -
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 .../dir-auto-dynamic-simple-ref.html          |   13 +
 .../dir-auto-dynamic-simple-replace.html      |   32 +
 .../dir-auto-dynamic-simple-textContent.html  |   31 +
 .../bidi-rendering/unicode-bidi-ua-rules.html |   88 +-
 tests/wpt/tests/html/resources/common.js      |    6 +
 .../change-to-empty-value.html                |   31 +
 .../change-to-empty-value.html                |   32 +
 .../the-dialog-element/dialog-open.html       |    4 +-
 ...arget-button-event-dispatch.tentative.html |    6 +-
 .../popover-shadow-dom-anchor.tentative.html  |   99 +
 .../popovers/popover-shadow-dom.html          |   94 +-
 .../popovers/popovertarget-reflection.html    |   34 +-
 .../inert-and-find.html}                      |   14 +-
 tests/wpt/tests/interfaces/uievents.idl       |   25 +-
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 .../MediaRecorder-peerconnection.https.html   |    4 +-
 tests/wpt/tests/orientation-event/README.md   |    8 -
 tests/wpt/tests/png/cICP-wins-ref.html        |   17 +
 tests/wpt/tests/png/cICP-wins.html            |   22 +
 tests/wpt/tests/png/support/cICP-and-iCCP.png |  Bin 0 -> 2745 bytes
 tests/wpt/tests/png/support/srgb_green.png    |  Bin 0 -> 192 bytes
 .../pointerevent_click_during_capture.html    |  290 +-
 .../chromium/generic_sensor_mocks.js          |  523 ---
 .../chromium/generic_sensor_mocks.js.headers  |    1 -
 .../css/animation-range-visual-test.html      |    2 +-
 .../selection-modify-around-textarea.html     |   23 +
 .../local-url-inherit-controller.https.html   |   18 +
 .../local-url-inherit-controller-frame.html   |   60 +-
 .../declarative/gethtml.tentative.html        |   25 +-
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 .../setters.tentative.https.sub.html          |   24 -
 .../referrer-policy-from-rules.https.html     |   28 +-
 .../referrer-policy-not-accepted.https.html   |   25 +-
 .../prefetch/resources/ruleset.py             |    3 +-
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 .../svg/linking/scripted/a.text-setter-01.svg |   44 -
 .../painting/reftests/paint-order-002-ref.svg |   61 +
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 tests/wpt/tests/tools/manifest/sourcefile.py  |    1 +
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 .../tools/webdriver/webdriver/bidi/client.py  |    2 +-
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 tests/wpt/tests/tools/wpt/android.py          |    6 +-
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 .../tools/wptrunner/requirements_sauce.txt    |    2 +-
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 .../wptserve/tests/functional/test_server.py  |   70 +-
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 create mode 100644 tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html
 create mode 100644 tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html
 create mode 100644 tests/wpt/tests/html/semantics/forms/the-input-element/change-to-empty-value.html
 create mode 100644 tests/wpt/tests/html/semantics/forms/the-textarea-element/change-to-empty-value.html
 create mode 100644 tests/wpt/tests/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html
 rename tests/wpt/tests/{css/css-ui/user-find.tentative.html => inert/inert-and-find.html} (76%)
 delete mode 100644 tests/wpt/tests/orientation-event/README.md
 create mode 100644 tests/wpt/tests/png/cICP-wins-ref.html
 create mode 100644 tests/wpt/tests/png/cICP-wins.html
 create mode 100644 tests/wpt/tests/png/support/cICP-and-iCCP.png
 create mode 100644 tests/wpt/tests/png/support/srgb_green.png
 delete mode 100644 tests/wpt/tests/resources/chromium/generic_sensor_mocks.js
 delete mode 100644 tests/wpt/tests/resources/chromium/generic_sensor_mocks.js.headers
 create mode 100644 tests/wpt/tests/selection/crashtests/selection-modify-around-textarea.html
 create mode 100644 tests/wpt/tests/shared-storage/setters-long-string.tentative.https.sub.html
 create mode 100644 tests/wpt/tests/svg/interact/scripted/async-02.html
 create mode 100644 tests/wpt/tests/svg/interact/scripted/async-03.html
 create mode 100644 tests/wpt/tests/svg/interact/scripted/defer-02.html
 create mode 100644 tests/wpt/tests/svg/interact/scripted/module-02.html
 delete mode 100644 tests/wpt/tests/svg/linking/scripted/a.text-getter-01.svg
 delete mode 100644 tests/wpt/tests/svg/linking/scripted/a.text-setter-01.svg
 create mode 100644 tests/wpt/tests/svg/painting/reftests/paint-order-002-ref.svg
 create mode 100644 tests/wpt/tests/svg/painting/reftests/paint-order-002.svg
 create mode 100644 tests/wpt/tests/svg/painting/reftests/paint-order-003-ref.svg
 create mode 100644 tests/wpt/tests/svg/painting/reftests/paint-order-003.svg
 rename tests/wpt/tests/svg/{rendering => render}/order/clip-path-filter-order-ref.svg (100%)
 rename tests/wpt/tests/svg/{rendering => render}/order/clip-path-filter-order.svg (100%)
 rename tests/wpt/tests/svg/{rendering => render}/order/z-index-ref.svg (100%)
 rename tests/wpt/tests/svg/{rendering => render}/order/z-index.svg (100%)
 rename tests/wpt/tests/svg/{ => styling}/color-inherit-link-visited-ref.svg (100%)
 rename tests/wpt/tests/svg/{ => styling}/color-inherit-link-visited.svg (100%)
 create mode 100644 tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.py
 create mode 100644 tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.sub.py
 create mode 100644 tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultsubpy/default.sub.py
 create mode 100644 tests/wpt/tests/tools/wptserve/tests/functional/docroot/foo.any.window-module.html
 create mode 100644 tests/wpt/tests/uievents/textInput/api.html
 create mode 100644 tests/wpt/tests/uievents/textInput/backspace.html
 create mode 100644 tests/wpt/tests/uievents/textInput/basic.html
 create mode 100644 tests/wpt/tests/uievents/textInput/delete-selection.html
 create mode 100644 tests/wpt/tests/uievents/textInput/delete.html
 create mode 100644 tests/wpt/tests/uievents/textInput/enter-input.html
 create mode 100644 tests/wpt/tests/uievents/textInput/enter-textarea-contenteditable.html
 create mode 100644 tests/wpt/tests/uievents/textInput/smiley-manual.html
 create mode 100644 tests/wpt/tests/uievents/textInput/support/basic.sub.js
 create mode 100644 tests/wpt/tests/uievents/textInput/support/common.js
 create mode 100644 tests/wpt/tests/uievents/textInput/support/no-textInput.sub.js
 create mode 100644 tests/wpt/tests/webdriver/tests/bidi/input/set_files/__init__.py
 create mode 100644 tests/wpt/tests/webdriver/tests/bidi/input/set_files/invalid.py
 create mode 100644 tests/wpt/tests/webdriver/tests/bidi/input/set_files/set_files.py
 create mode 100644 tests/wpt/tests/webdriver/tests/bidi/network/before_request_sent/before_request_sent_cached.py
 create mode 100644 tests/wpt/tests/webdriver/tests/bidi/network/provide_response/request.py
 create mode 100644 tests/wpt/tests/webdriver/tests/support/html/files.html
 create mode 100644 tests/wpt/tests/webnn/constant.https.any.js
 create mode 100644 tests/wpt/tests/webnn/gpu/constant.https.any.js
 create mode 100644 tests/wpt/tests/webnn/gpu/triangular.https.any.js
 create mode 100644 tests/wpt/tests/webnn/resources/test_data/constant.json
 create mode 100644 tests/wpt/tests/webnn/resources/test_data/l2_pool2d.json
 create mode 100644 tests/wpt/tests/webnn/resources/test_data/triangular.json
 create mode 100644 tests/wpt/tests/webnn/triangular.https.any.js
 create mode 100644 tests/wpt/tests/webrtc/RTCRtpReceiver.https.html
 create mode 100644 tests/wpt/tests/webrtc/protocol/codecs-filtered-by-direction.https.html
 create mode 100644 tests/wpt/tests/webrtc/protocol/codecs-subsequent-offer.https.html
 create mode 100644 tests/wpt/tests/webtransport/stats.https.any.js

diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/floats/float-no-interpolation.html.ini b/tests/wpt/meta-legacy-layout/css/CSS2/floats/float-no-interpolation.html.ini
index 892e67bc160..3f08ae0f698 100644
--- a/tests/wpt/meta-legacy-layout/css/CSS2/floats/float-no-interpolation.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/floats/float-no-interpolation.html.ini
@@ -37,3 +37,39 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <float> from [initial\] to [right\] at (0.3) should be [initial\]]
     expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0.5) should be [right\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (1) should be [right\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (1.5) should be [right\]]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini
new file mode 100644
index 00000000000..3c1eac87f60
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini
@@ -0,0 +1,2 @@
+[margin-collapse-clear-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini
new file mode 100644
index 00000000000..188c0a7354c
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini
@@ -0,0 +1,2 @@
+[margin-collapse-clear-007.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht.ini
new file mode 100644
index 00000000000..4534f5ec188
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht.ini
@@ -0,0 +1,2 @@
+[margin-left-applies-to-008.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini
new file mode 100644
index 00000000000..1d4a4623f91
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini
@@ -0,0 +1,2 @@
+[padding-applies-to-016.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini
new file mode 100644
index 00000000000..02c94e9fa6f
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini
@@ -0,0 +1,2 @@
+[padding-applies-to-017.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-007.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-007.xht.ini
new file mode 100644
index 00000000000..86bd1e058f4
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-007.xht.ini
@@ -0,0 +1,2 @@
+[first-line-pseudo-007.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-008.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-008.xht.ini
new file mode 100644
index 00000000000..0f43b45c00e
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-pseudo-008.xht.ini
@@ -0,0 +1,2 @@
+[first-line-pseudo-008.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-selector-004.xht.ini b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-selector-004.xht.ini
new file mode 100644
index 00000000000..6adda0b1240
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/selectors/first-line-selector-004.xht.ini
@@ -0,0 +1,2 @@
+[first-line-selector-004.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions.html.ini
similarity index 67%
rename from tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini
rename to tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions.html.ini
index fcc2d8205dd..2d7ef3e268f 100644
--- a/tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-borders/border-image-width-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[border-image-width-interpolation-math-functions-tentative.html]
+[border-image-width-interpolation-math-functions.html]
   [CSS Transitions: property <border-image-width> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <border-image-width> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-computed-relative-color.html.ini b/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-computed-relative-color.html.ini
index 718a1bf8f6b..bf29c753411 100644
--- a/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-computed-relative-color.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-computed-relative-color.html.ini
@@ -3322,3 +3322,51 @@
 
   [Property color value 'color(from color(srgb 0.25 0.5 0.75) xyz-d65 x y z)']
     expected: FAIL
+
+  [Property color value 'rgb(from color-mix(in srgb, red, red) r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'hsl(from color-mix(in srgb, red, red) h s l / alpha)']
+    expected: FAIL
+
+  [Property color value 'hwb(from color-mix(in srgb, red, red) h w b / alpha)']
+    expected: FAIL
+
+  [Property color value 'lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)']
+    expected: FAIL
+
+  [Property color value 'oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)']
+    expected: FAIL
+
+  [Property color value 'lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)']
+    expected: FAIL
+
+  [Property color value 'oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(srgb 0.7 0.5 0.3), color(srgb 0.7 0.5 0.3)) srgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(srgb-linear 0.7 0.5 0.3), color(srgb-linear 0.7 0.5 0.3)) srgb-linear r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(a98-rgb 0.7 0.5 0.3), color(a98-rgb 0.7 0.5 0.3)) a98-rgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(rec2020 0.7 0.5 0.3), color(rec2020 0.7 0.5 0.3)) rec2020 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(prophoto-rgb 0.7 0.5 0.3), color(prophoto-rgb 0.7 0.5 0.3)) prophoto-rgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(display-p3 0.7 0.5 0.3), color(display-p3 0.7 0.5 0.3)) display-p3 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz 0.7 0.5 0.3), color(xyz 0.7 0.5 0.3)) xyz r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz-d50 0.7 0.5 0.3), color(xyz-d50 0.7 0.5 0.3)) xyz-d50 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz-d65 0.7 0.5 0.3), color(xyz-d65 0.7 0.5 0.3)) xyz-d65 r g b / alpha)']
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-valid-relative-color.html.ini b/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-valid-relative-color.html.ini
index 53aa01a0c08..3a3198a2980 100644
--- a/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-valid-relative-color.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-color/parsing/color-valid-relative-color.html.ini
@@ -3235,3 +3235,51 @@
 
   [e.style['color'\] = "oklch(from oklch(0.7 0.2 300) l c calc(h * 2.5))" should set the property value]
     expected: FAIL
+
+  [e.style['color'\] = "rgb(from color-mix(in srgb, red, red) r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "hsl(from color-mix(in srgb, red, red) h s l / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "hwb(from color-mix(in srgb, red, red) h w b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(srgb 0.7 0.5 0.3), color(srgb 0.7 0.5 0.3)) srgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(srgb-linear 0.7 0.5 0.3), color(srgb-linear 0.7 0.5 0.3)) srgb-linear r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(a98-rgb 0.7 0.5 0.3), color(a98-rgb 0.7 0.5 0.3)) a98-rgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(rec2020 0.7 0.5 0.3), color(rec2020 0.7 0.5 0.3)) rec2020 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(prophoto-rgb 0.7 0.5 0.3), color(prophoto-rgb 0.7 0.5 0.3)) prophoto-rgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(display-p3 0.7 0.5 0.3), color(display-p3 0.7 0.5 0.3)) display-p3 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz 0.7 0.5 0.3), color(xyz 0.7 0.5 0.3)) xyz r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz-d50 0.7 0.5 0.3), color(xyz-d50 0.7 0.5 0.3)) xyz-d50 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz-d65 0.7 0.5 0.3), color(xyz-d65 0.7 0.5 0.3)) xyz-d65 r g b / alpha)" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
similarity index 67%
rename from tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini
rename to tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
index ac7fa1b4461..5aee51bfe8c 100644
--- a/tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[font-size-adjust-interpolation-math-functions.tentative.html]
+[font-size-adjust-interpolation-math-functions.html]
   [CSS Transitions: property <font-size-adjust> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <font-size-adjust> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
similarity index 68%
rename from tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini
rename to tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
index 30f9f12ae64..f1553f90850 100644
--- a/tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[font-stretch-interpolation-math-functions.tentative.html]
+[font-stretch-interpolation-math-functions.html]
   [CSS Transitions: property <font-stretch> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <font-stretch> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini
new file mode 100644
index 00000000000..82db1df1d80
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini
@@ -0,0 +1,216 @@
+[image-slice-interpolation-math-functions-tentative.html]
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/animations/position-interpolation.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/animations/position-interpolation.html.ini
index 474800021cf..80d094f4c6f 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/animations/position-interpolation.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/animations/position-interpolation.html.ini
@@ -37,3 +37,75 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <position> from [absolute\] to [static\] at (0.3) should be [absolute\]]
     expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0.5) should be [static\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (1) should be [static\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (1.5) should be [static\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0.5) should be [fixed\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (1) should be [fixed\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (1.5) should be [fixed\]]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-001.html.ini b/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-001.html.ini
new file mode 100644
index 00000000000..3dd9f08680a
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-001.html.ini
@@ -0,0 +1,2 @@
+[table-cell-overflow-explicit-height-001.html]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-002.html.ini b/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-002.html.ini
new file mode 100644
index 00000000000..be154785d82
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-tables/table-cell-overflow-explicit-height-002.html.ini
@@ -0,0 +1,2 @@
+[table-cell-overflow-explicit-height-002.html]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-text/text-align/text-align-last-interpolation.html.ini b/tests/wpt/meta-legacy-layout/css/css-text/text-align/text-align-last-interpolation.html.ini
index 23280d719e7..f8971d3556a 100644
--- a/tests/wpt/meta-legacy-layout/css/css-text/text-align/text-align-last-interpolation.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-text/text-align/text-align-last-interpolation.html.ini
@@ -191,18 +191,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.5) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.6) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1.5) should be [start\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (-0.3) should be [auto\]]
     expected: FAIL
 
@@ -212,18 +200,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.5) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.6) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1.5) should be [start\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (-0.3) should be [justify\]]
     expected: FAIL
 
@@ -233,18 +209,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.3) should be [justify\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.5) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.6) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1.5) should be [center\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (-0.3) should be [justify\]]
     expected: FAIL
 
@@ -254,18 +218,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.3) should be [justify\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.5) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.6) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1.5) should be [center\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (-0.3) should be [left\]]
     expected: FAIL
 
@@ -275,18 +227,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.3) should be [left\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.5) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.6) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (1) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (1.5) should be [right\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (-0.3) should be [left\]]
     expected: FAIL
 
@@ -296,18 +236,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.3) should be [left\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.5) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.6) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (1) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (1.5) should be [right\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [end\] to [match-parent\] at (-0.3) should be [end\]]
     expected: FAIL
 
diff --git a/tests/wpt/meta-legacy-layout/css/css-transitions/all-with-discrete.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-transitions/all-with-discrete.tentative.html.ini
deleted file mode 100644
index 0a425b104e1..00000000000
--- a/tests/wpt/meta-legacy-layout/css/css-transitions/all-with-discrete.tentative.html.ini
+++ /dev/null
@@ -1,12 +0,0 @@
-[all-with-discrete.tentative.html]
-  [all with an explicit discrete property should animate.]
-    expected: FAIL
-
-  [all without an explicit discrete property should not animate.]
-    expected: FAIL
-
-  [transition:all with transition-animation-type:discrete should animate discrete properties.]
-    expected: FAIL
-
-  [transition:all with transition-behavior:allow-discrete should animate discrete properties.]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini b/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
deleted file mode 100644
index e35a452a186..00000000000
--- a/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[no-transition-from-ua-to-blocking-stylesheet.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-transitions/transition-behaivor.html.ini b/tests/wpt/meta-legacy-layout/css/css-transitions/transition-behaivor.html.ini
new file mode 100644
index 00000000000..be999af2dc0
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-transitions/transition-behaivor.html.ini
@@ -0,0 +1,18 @@
+[transition-behaivor.html]
+  [transition-behavior:allow-discrete should animate discrete properties.]
+    expected: FAIL
+
+  [transition-behavior:allow-discrete overlaps the previous normal value.]
+    expected: FAIL
+
+  [transition-behavior:normal overlaps the previous allow-discrete value.]
+    expected: FAIL
+
+  [transition-behavior changed to normal should stop the running discrete transitions.]
+    expected: FAIL
+
+  [transition-behavior:allow-discrete should animate for values fallback to discrete animations.]
+    expected: FAIL
+
+  [transition-behavior:normal should cancel the running transitions whose animation values are not interpolatable]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-computed.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-computed.tentative.html.ini
deleted file mode 100644
index 7a52f8415e9..00000000000
--- a/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-computed.tentative.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[user-find-computed.tentative.html]
-  [Property user-find value 'auto']
-    expected: FAIL
-
-  [Property user-find value 'none']
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-valid.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-valid.tentative.html.ini
deleted file mode 100644
index 5484a92303f..00000000000
--- a/tests/wpt/meta-legacy-layout/css/css-ui/parsing/user-find-valid.tentative.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[user-find-valid.tentative.html]
-  [e.style['user-find'\] = "auto" should set the property value]
-    expected: FAIL
-
-  [e.style['user-find'\] = "none" should set the property value]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-ui/user-find.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-ui/user-find.tentative.html.ini
deleted file mode 100644
index 2455027f9c7..00000000000
--- a/tests/wpt/meta-legacy-layout/css/css-ui/user-find.tentative.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[user-find.tentative.html]
-  [Basic test for the user-find property]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-variables/variables-animation-math-functions-tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions.html.ini
similarity index 68%
rename from tests/wpt/meta/css/css-variables/variables-animation-math-functions-tentative.html.ini
rename to tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions.html.ini
index fc4c1ab570a..c116f3a7393 100644
--- a/tests/wpt/meta/css/css-variables/variables-animation-math-functions-tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[variables-animation-math-functions-tentative.html]
+[variables-animation-math-functions.html]
   [CSS Transitions: property <--my-angle> from [100deg\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
@@ -53,56 +53,56 @@
   [Web Animations: property <--my-angle> from [100deg\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/filter-effects/backdrop-filter-clip-rect-2.html.ini b/tests/wpt/meta-legacy-layout/css/filter-effects/backdrop-filter-clip-rect-2.html.ini
new file mode 100644
index 00000000000..1faf9f58f50
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/filter-effects/backdrop-filter-clip-rect-2.html.ini
@@ -0,0 +1,2 @@
+[backdrop-filter-clip-rect-2.html]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/nodes/Document-createEvent.https.html.ini b/tests/wpt/meta-legacy-layout/dom/nodes/Document-createEvent.https.html.ini
index 2b1440d9ef1..71c4f1358b7 100644
--- a/tests/wpt/meta-legacy-layout/dom/nodes/Document-createEvent.https.html.ini
+++ b/tests/wpt/meta-legacy-layout/dom/nodes/Document-createEvent.https.html.ini
@@ -73,3 +73,12 @@
 
   [createEvent('TOUCHEVENT') should be initialized correctly.]
     expected: PRECONDITION_FAILED
+
+  [TextEvent should be an alias for TextEvent.]
+    expected: FAIL
+
+  [textevent should be an alias for TextEvent.]
+    expected: FAIL
+
+  [TEXTEVENT should be an alias for TextEvent.]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini b/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini
new file mode 100644
index 00000000000..b9a477ad044
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini
@@ -0,0 +1,3 @@
+[insertion-removing-steps-iframe.window.html]
+  [Insertion steps: load event fires synchronously *after* iframe DOM insertion, as part of the iframe element's insertion steps]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini b/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini
new file mode 100644
index 00000000000..d1ba832db34
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini
@@ -0,0 +1,2 @@
+[insertion-removing-steps-script.window.html]
+  expected: ERROR
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-constructor.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-constructor.any.js.ini
index e132211192b..3997fbb757a 100644
--- a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-constructor.any.js.ini
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-constructor.any.js.ini
@@ -107,6 +107,9 @@
   [Subscriber signal is readonly]
     expected: FAIL
 
+  [Subscriber#error() value is stored as Subscriber's AbortSignal's reason]
+    expected: FAIL
+
 
 [observable-constructor.any.html]
   [Observable constructor]
@@ -216,3 +219,6 @@
 
   [Subscriber signal is readonly]
     expected: FAIL
+
+  [Subscriber#error() value is stored as Subscriber's AbortSignal's reason]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-drop.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-drop.any.js.ini
new file mode 100644
index 00000000000..ee4ff84998b
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-drop.any.js.ini
@@ -0,0 +1,44 @@
+[observable-drop.any.html]
+  [drop(): Observable should skip the first n values from the source observable, then pass through the rest of the values and completion]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source Observable]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Observable passes through completions from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Unsubscribing from the Observable returned by drop() also unsubscribes from the source Observable]
+    expected: FAIL
+
+  [drop(): A drop amount of 0 simply mirrors the source Observable]
+    expected: FAIL
+
+  [drop(): Passing negative value wraps to maximum value ]
+    expected: FAIL
+
+
+[observable-drop.any.worker.html]
+  [drop(): Observable should skip the first n values from the source observable, then pass through the rest of the values and completion]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source Observable]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Observable passes through completions from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Unsubscribing from the Observable returned by drop() also unsubscribes from the source Observable]
+    expected: FAIL
+
+  [drop(): A drop amount of 0 simply mirrors the source Observable]
+    expected: FAIL
+
+  [drop(): Passing negative value wraps to maximum value ]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-filter.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-filter.any.js.ini
new file mode 100644
index 00000000000..159169b6565
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-filter.any.js.ini
@@ -0,0 +1,32 @@
+[observable-filter.any.html]
+  [filter(): Returned Observable filters out results based on predicate]
+    expected: FAIL
+
+  [filter(): Errors thrown in filter predicate are emitted to Observer error() handler]
+    expected: FAIL
+
+  [filter(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [filter(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [filter(): Upon source completion, source Observable teardown sequence happens after downstream filter complete() is called]
+    expected: FAIL
+
+
+[observable-filter.any.worker.html]
+  [filter(): Returned Observable filters out results based on predicate]
+    expected: FAIL
+
+  [filter(): Errors thrown in filter predicate are emitted to Observer error() handler]
+    expected: FAIL
+
+  [filter(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [filter(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [filter(): Upon source completion, source Observable teardown sequence happens after downstream filter complete() is called]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.any.js.ini
new file mode 100644
index 00000000000..79bbd45c641
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.any.js.ini
@@ -0,0 +1,38 @@
+[observable-map.any.worker.html]
+  [map(): Maps values correctly]
+    expected: FAIL
+
+  [map(): Mapper errors are emitted to Observer error() handler]
+    expected: FAIL
+
+  [map(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [map(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [map(): Upon source completion, source Observable teardown sequence happens before downstream mapper complete() is called]
+    expected: FAIL
+
+  [map(): Map observable unsubscription causes source Observable unsubscription. Mapper Observer's complete()/error() are not called]
+    expected: FAIL
+
+
+[observable-map.any.html]
+  [map(): Maps values correctly]
+    expected: FAIL
+
+  [map(): Mapper errors are emitted to Observer error() handler]
+    expected: FAIL
+
+  [map(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [map(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [map(): Upon source completion, source Observable teardown sequence happens before downstream mapper complete() is called]
+    expected: FAIL
+
+  [map(): Map observable unsubscription causes source Observable unsubscription. Mapper Observer's complete()/error() are not called]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.window.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.window.js.ini
new file mode 100644
index 00000000000..7c6b17b7a58
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-map.window.js.ini
@@ -0,0 +1,3 @@
+[observable-map.window.html]
+  [map()'s internal observer's next steps do not crash in a detached document]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-take.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-take.any.js.ini
new file mode 100644
index 00000000000..12e87c00348
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-take.any.js.ini
@@ -0,0 +1,32 @@
+[observable-take.any.html]
+  [take(): Takes the first N values from the source observable, then completes]
+    expected: FAIL
+
+  [take(): Forwards complete()s that happen before the take count is met, and unsubscribes from source Observable]
+    expected: FAIL
+
+  [take(): Should forward errors from the source observable]
+    expected: FAIL
+
+  [take(): take(0) should not subscribe to the source observable, and should return an observable that immediately completes]
+    expected: FAIL
+
+  [take(): Negative count is treated as maximum value]
+    expected: FAIL
+
+
+[observable-take.any.worker.html]
+  [take(): Takes the first N values from the source observable, then completes]
+    expected: FAIL
+
+  [take(): Forwards complete()s that happen before the take count is met, and unsubscribes from source Observable]
+    expected: FAIL
+
+  [take(): Should forward errors from the source observable]
+    expected: FAIL
+
+  [take(): take(0) should not subscribe to the source observable, and should return an observable that immediately completes]
+    expected: FAIL
+
+  [take(): Negative count is treated as maximum value]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-takeUntil.any.js.ini b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-takeUntil.any.js.ini
index e799d7864a3..e792b882a69 100644
--- a/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-takeUntil.any.js.ini
+++ b/tests/wpt/meta-legacy-layout/dom/observable/tentative/observable-takeUntil.any.js.ini
@@ -32,6 +32,15 @@
   [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
     expected: FAIL
 
+  [takeUntil: notifier next() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier error() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier throw Error unsubscribes from notifier]
+    expected: FAIL
+
 
 [observable-takeUntil.any.worker.html]
   [takeUntil subscribes to source Observable and mirrors it uninterrupted]
@@ -66,3 +75,12 @@
 
   [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
     expected: FAIL
+
+  [takeUntil: notifier next() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier error() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier throw Error unsubscribes from notifier]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/gamepad/gamepad-secure-context.html.ini b/tests/wpt/meta-legacy-layout/gamepad/gamepad-secure-context.html.ini
deleted file mode 100644
index 08805696a51..00000000000
--- a/tests/wpt/meta-legacy-layout/gamepad/gamepad-secure-context.html.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[gamepad-secure-context.html]
-  [When in a non-secure context, getGamepad() should throw an error.]
-    expected: FAIL
-
-  [Gamepad API is not exposed in insecure contexts]
-    expected: FAIL
-
-  [Gamepad API is not exposed in non-secure contexts]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/gamepad/idlharness.https.window.js.ini b/tests/wpt/meta-legacy-layout/gamepad/idlharness.window.js.ini
similarity index 97%
rename from tests/wpt/meta-legacy-layout/gamepad/idlharness.https.window.js.ini
rename to tests/wpt/meta-legacy-layout/gamepad/idlharness.window.js.ini
index 55ec1643e45..37c2bd87ea1 100644
--- a/tests/wpt/meta-legacy-layout/gamepad/idlharness.https.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/gamepad/idlharness.window.js.ini
@@ -1,13 +1,4 @@
-[idlharness.https.window.html]
-  [GamepadEvent must be primary interface of new GamepadEvent("gamepad")]
-    expected: FAIL
-
-  [GamepadEvent interface: new GamepadEvent("gamepad") must inherit property "gamepad" with the proper type]
-    expected: FAIL
-
-  [Stringification of new GamepadEvent("gamepad")]
-    expected: FAIL
-
+[idlharness.window.html]
   [Gamepad interface: attribute vibrationActuator]
     expected: FAIL
 
@@ -37,3 +28,12 @@
 
   [GamepadHapticActuator interface: operation reset()]
     expected: FAIL
+
+  [GamepadEvent must be primary interface of new GamepadEvent("gamepad")]
+    expected: FAIL
+
+  [Stringification of new GamepadEvent("gamepad")]
+    expected: FAIL
+
+  [GamepadEvent interface: new GamepadEvent("gamepad") must inherit property "gamepad" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/meta/gamepad/not-fully-active.https.html.ini b/tests/wpt/meta-legacy-layout/gamepad/not-fully-active.html.ini
similarity index 71%
rename from tests/wpt/meta/gamepad/not-fully-active.https.html.ini
rename to tests/wpt/meta-legacy-layout/gamepad/not-fully-active.html.ini
index f0eac5a9f3a..1b5a91a41e7 100644
--- a/tests/wpt/meta/gamepad/not-fully-active.https.html.ini
+++ b/tests/wpt/meta-legacy-layout/gamepad/not-fully-active.html.ini
@@ -1,3 +1,3 @@
-[not-fully-active.https.html]
+[not-fully-active.html]
   [calling getGamepads() in a non-fully-active document]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
index 5aef7ce66ce..324db3d9b35 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
@@ -10,6 +10,3 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 8ae58f9f1e2..f27acdd3b9d 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -4,18 +4,3 @@
 
   [Test javascript URL string return values in direct and indirect (target) frame contexts. 9]
     expected: FAIL
-
-  [0041 set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [0080 00FF set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [0080 00FF 0100 set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [D83D DE0D set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [DE0D 0041 set in href="" targeting a frame and clicked]
-    expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
similarity index 100%
rename from tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
rename to tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
diff --git a/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini
new file mode 100644
index 00000000000..282b90eb5b0
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-dataChange.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini
new file mode 100644
index 00000000000..3aa6f198cd2
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-replace.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini
new file mode 100644
index 00000000000..c61fc8cf968
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-textContent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini b/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
index 2ef0896e3b3..8b8af2b9c2e 100644
--- a/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
@@ -1,4 +1,3 @@
 [document-base-url-window-initiator-is-not-opener.https.window.html]
-  expected: TIMEOUT
   [window.open() gets base url from initiator not opener.]
     expected: [FAIL, PASS, TIMEOUT]
diff --git a/tests/wpt/meta-legacy-layout/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini b/tests/wpt/meta-legacy-layout/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
index 01f2382ec8e..1ba0e76c448 100644
--- a/tests/wpt/meta-legacy-layout/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
@@ -1,3 +1,15 @@
 [unicode-bidi-ua-rules.html]
   [UA stylesheet rule for unicode-bidi, for <search>]
     expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=search>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=tel>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=url>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=email>]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
index fd0a4743026..246e55deb7e 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
@@ -1,4 +1,4 @@
 [no-cuechange-before-play.html]
+  expected: TIMEOUT
   [Ensure that the 'cuechange' event is not fired before video playback has begun.]
-    expected: FAIL
-
+    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 25d9964f057..906e7bae909 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,4 +1,4 @@
 [iframe_sandbox_popups_escaping-1.html]
   type: testharness
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index 6f7461b9472..27d7d744d3d 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,4 +1,4 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini
new file mode 100644
index 00000000000..e0fca770e18
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini
@@ -0,0 +1,6 @@
+[popover-shadow-dom-anchor.tentative.html]
+  [anchor references do not cross shadow boundaries]
+    expected: FAIL
+
+  [anchor references use the flat tree not the DOM tree]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
new file mode 100644
index 00000000000..752f99a106e
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
@@ -0,0 +1,4 @@
+[async-script.html?default]
+
+[async-script.html?reload]
+  expected: ERROR
diff --git a/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini
deleted file mode 100644
index b8bdf33cb65..00000000000
--- a/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[DOMContentLoaded-defer.html]
-  [The end: DOMContentLoaded and defer scripts]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini b/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
index 910c88d3e81..02eab480ab6 100644
--- a/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
@@ -1,5 +1,5 @@
 [ignore-opens-during-unload.window.html]
-  expected: CRASH
+  expected: TIMEOUT
   [ignore-opens-during-unload]
     expected: FAIL
 
@@ -41,4 +41,3 @@
 
   [document.open should bail out when ignore-opens-during-unload is greater than 0 during unload event (open(parent) while unloading parent and child)]
     expected: TIMEOUT
-
diff --git a/tests/wpt/meta-legacy-layout/resource-timing/nested-context-navigations-iframe.html.ini b/tests/wpt/meta-legacy-layout/resource-timing/nested-context-navigations-iframe.html.ini
index 9df96f72c08..4164d42f08e 100644
--- a/tests/wpt/meta-legacy-layout/resource-timing/nested-context-navigations-iframe.html.ini
+++ b/tests/wpt/meta-legacy-layout/resource-timing/nested-context-navigations-iframe.html.ini
@@ -1,10 +1,19 @@
 [nested-context-navigations-iframe.html]
   expected: TIMEOUT
   [Test that iframe refreshes are not observable by the parent]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [Test that crossorigin iframe refreshes are not observable by the parent]
     expected: NOTRUN
 
   [Test that cross-site iframe refreshes are not observable by the parent]
     expected: NOTRUN
+
+  [Test that iframe navigations are not observable by the parent]
+    expected: NOTRUN
+
+  [Test that crossorigin iframe navigations are not observable by the parent]
+    expected: NOTRUN
+
+  [Test that cross-site iframe navigations are not observable by the parent]
+    expected: NOTRUN
diff --git a/tests/wpt/meta-legacy-layout/resource-timing/test_resource_timing.html.ini b/tests/wpt/meta-legacy-layout/resource-timing/test_resource_timing.html.ini
index 12581463c49..86a2572b9b8 100644
--- a/tests/wpt/meta-legacy-layout/resource-timing/test_resource_timing.html.ini
+++ b/tests/wpt/meta-legacy-layout/resource-timing/test_resource_timing.html.ini
@@ -68,6 +68,3 @@
 
   [PerformanceEntry has correct protocol attribute (xmlhttprequest)]
     expected: FAIL
-
-  [PerformanceEntry has correct name, initiatorType, startTime, and duration (img)]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/uievents/textInput/api.html.ini b/tests/wpt/meta-legacy-layout/uievents/textInput/api.html.ini
new file mode 100644
index 00000000000..8f034ec4e50
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/uievents/textInput/api.html.ini
@@ -0,0 +1,24 @@
+[api.html]
+  [No constructor]
+    expected: FAIL
+
+  [document.CreateEvent('TextEvent') prototype chain]
+    expected: FAIL
+
+  [initTextEvent('foo')]
+    expected: FAIL
+
+  [initTextEvent('foo', true, true, window, 'bar')]
+    expected: FAIL
+
+  [case sensitivity: textInput vs textinput]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <input>]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <textarea>]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <div contenteditable="">]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/webmessaging/without-ports/018.html.ini b/tests/wpt/meta-legacy-layout/webmessaging/with-ports/018.html.ini
similarity index 100%
rename from tests/wpt/meta-legacy-layout/webmessaging/without-ports/018.html.ini
rename to tests/wpt/meta-legacy-layout/webmessaging/with-ports/018.html.ini
diff --git a/tests/wpt/meta/MANIFEST.json b/tests/wpt/meta/MANIFEST.json
index c39d1f22ab2..ac0748fd277 100644
--- a/tests/wpt/meta/MANIFEST.json
+++ b/tests/wpt/meta/MANIFEST.json
@@ -2942,6 +2942,13 @@
         {}
        ]
       ],
+      "multicol-with-oof-in-multicol-with-oof-in-multicol.html": [
+       "b1104e28dde1e1a8d393d182d402397019fdf035",
+       [
+        null,
+        {}
+       ]
+      ],
       "negative-margin-on-column-spanner.html": [
        "0e14943d0157c2f5c1611174ea104431da177ba3",
        [
@@ -5446,6 +5453,13 @@
        {}
       ]
      ],
+     "enableInlineTableEditing-after-updating-selection-range-cross-shadow-dom-boundary.html": [
+      "b248e03ea05fb85b89ab50e782d37ffec9075ea9",
+      [
+       null,
+       {}
+      ]
+     ],
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        [
@@ -793427,13 +795982,6 @@
         {}
        ]
       ],
-      "margin-collapse-012.xht": [
-       "1111ea8828533d4378250ad7dcd76b84ff45b492",
-       [
-        null,
-        {}
-       ]
-      ],
       "margin-collapse-029.xht": [
        "0eea0036f32e4460a044895d515eba1f01800de2",
        [
@@ -793637,13 +796185,6 @@
         {}
        ]
       ],
-      "margin-collapse-clear-001.xht": [
-       "64bb404982646a49a4bb5f2f972a2e381910f2d0",
-       [
-        null,
-        {}
-       ]
-      ],
       "margin-collapse-clear-004.xht": [
        "5be63f6100487c7e1c79e7cf6ecd7b9695ab6b23",
        [
@@ -793658,13 +796199,6 @@
         {}
        ]
       ],
-      "margin-collapse-clear-007.xht": [
-       "4c320ac1876f5b3c0f3ae36266c9384a33792156",
-       [
-        null,
-        {}
-       ]
-      ],
       "margin-collapse-clear-010.xht": [
        "19cc99be49cae97dfdad96f69b654b4680feae14",
        [
@@ -793672,13 +796206,6 @@
         {}
        ]
       ],
-      "margin-left-applies-to-008.xht": [
-       "2121019ae84d7cc23db9b2f7614384341c570448",
-       [
-        null,
-        {}
-       ]
-      ],
       "margin-left-applies-to-010.xht": [
        "beea15e4d4d5c442c8c47aeae2666252084d8eed",
        [
@@ -793728,20 +796255,6 @@
         {}
        ]
       ],
-      "padding-applies-to-016.xht": [
-       "7023f79cd11090fc74db126ff187b63882f69938",
-       [
-        null,
-        {}
-       ]
-      ],
-      "padding-applies-to-017.xht": [
-       "8ff267c081cea05c6e569b45876b7911174d41b7",
-       [
-        null,
-        {}
-       ]
-      ],
       "padding-bottom-036.xht": [
        "ab6935022dee9b1778e57fac0a801aedcb457fd6",
        [
@@ -793940,13 +796453,6 @@
         {}
        ]
       ],
-      "block-non-replaced-width-002.xht": [
-       "cf14e37ab7ef4e38a19d97c7965277729b2e76f1",
-       [
-        null,
-        {}
-       ]
-      ],
       "block-non-replaced-width-008.xht": [
        "9843753c5990c5e084f1293a5ba8479c592be9e1",
        [
@@ -794220,13 +796726,6 @@
         {}
        ]
       ],
-      "max-width-014.xht": [
-       "83c75c6528d1d9e279c77c735d4c7f10828cf0a9",
-       [
-        null,
-        {}
-       ]
-      ],
       "max-width-108.xht": [
        "f9f71319c1a2dc325cd394cf1e5e7aa7905ccedb",
        [
@@ -794304,13 +796803,6 @@
         {}
        ]
       ],
-      "min-width-014.xht": [
-       "538b701cd650a2190c52bae23ce7972ffb5ae331",
-       [
-        null,
-        {}
-       ]
-      ],
       "min-width-applies-to-010.xht": [
        "7d01d9c49379ea79f6e7a9b87394e1c604e5e90e",
        [
@@ -794346,13 +796838,6 @@
         {}
        ]
       ],
-      "width-014.xht": [
-       "c0094c463b5942428035270c0914bf0a12a739e2",
-       [
-        null,
-        {}
-       ]
-      ],
       "width-applies-to-010.xht": [
        "acd3bf2ba4d7e0a466a39487129741df65b6176e",
        [
@@ -794904,20 +797389,6 @@
         {}
        ]
       ],
-      "first-line-pseudo-007.xht": [
-       "6cdacc605824ff60183ada151446ecd16f187562",
-       [
-        null,
-        {}
-       ]
-      ],
-      "first-line-pseudo-008.xht": [
-       "19b867f7e12d1c3b2b26aad50baf8f2a7303aeda",
-       [
-        null,
-        {}
-       ]
-      ],
       "first-line-pseudo-010.xht": [
        "f07bb02c0bc250850c80308562010fe40a63753e",
        [
@@ -794960,13 +797431,6 @@
         {}
        ]
       ],
-      "first-line-selector-004.xht": [
-       "b19368d4ba7b3aa6ce035c1747533a29f08965e6",
-       [
-        null,
-        {}
-       ]
-      ],
       "first-line-selector-006.xht": [
        "192e0678e4a97dd5440cf7b96105d98e538cecdb",
        [
@@ -795039,55 +797503,6 @@
         {}
        ]
       ],
-      "character-encoding-031.xht": [
-       "3e8bac6a3fe6036034e1ab1d73ad11538885e679",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-032.xht": [
-       "04c6cf4d1f80137ff65c0f502e357fea5ab5beda",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-033.xht": [
-       "8042c899f37f1a0d14152bd26eaa57f233dd43a4",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-034.xht": [
-       "ab6ded6bd3ec74a769defd2c4dccd010b6b0039b",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-035.xht": [
-       "12896b0f75650c12b42d58007c9fc99b7ffc8444",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-036.xht": [
-       "2a9ab495c20d68519396cd46708364924cee6970",
-       [
-        null,
-        {}
-       ]
-      ],
-      "character-encoding-037.xht": [
-       "02c28caf1f5852f867e61a8522690f2122e66163",
-       [
-        null,
-        {}
-       ]
-      ],
       "character-encoding-038.xht": [
        "880ff589552a36713566080b393dbb12c642f6a9",
        [
@@ -808222,6 +810637,22 @@
           {}
          ]
         ]
+       },
+       "set_files": {
+        "invalid.py": [
+         "f0efeaa69c579e39286312cde12e4c36d86921a3",
+         [
+          null,
+          {}
+         ]
+        ],
+        "set_files.py": [
+         "642bd3e5423d57238ef57863b7ba36010c10730e",
+         [
+          null,
+          {}
+         ]
+        ]
        }
       },
       "integration": {
@@ -808317,7 +810748,7 @@
          ]
         ],
         "url_patterns.py": [
-         "517a94ffc4b0172e4668c235b206381b4f26b716",
+         "cee5f5d8225460a2fcaeaf5d12cf3d9ba7d0eefb",
          [
           null,
           {}
@@ -808347,6 +810778,13 @@
           null,
           {}
          ]
+        ],
+        "before_request_sent_cached.py": [
+         "2de71362ae5d117320338cb62bb7c6110d9f33cd",
+         [
+          null,
+          {}
+         ]
         ]
        },
        "combined": {
@@ -808385,7 +810823,7 @@
          ]
         ],
         "invalid.py": [
-         "2b59b3acc636e8b9cab4f729f727855750b6312f",
+         "41f786ef6d7c62260e267192fc1158484be617fb",
          [
           null,
           {
@@ -808444,7 +810882,16 @@
        },
        "provide_response": {
         "invalid.py": [
-         "eec118a692df3a27d89236d7e2862dd2aca9f35d",
+         "49177bcb4a0d0b92d57ddf69cdd86c47de9b74c7",
+         [
+          null,
+          {
+           "timeout": "long"
+          }
+         ]
+        ],
+        "request.py": [
+         "de9492f0a52c3bc896ffde993de63cd0d29b9df5",
          [
           null,
           {}
@@ -808478,7 +810925,7 @@
          ]
         ],
         "response_completed_cached.py": [
-         "6457e7d412b7c94016e80bea2734b6a0aa675f8d",
+         "25503c971db76355751fedb77cd223adfa4193c2",
          [
           null,
           {}
@@ -808501,7 +810948,7 @@
          ]
         ],
         "response_started_cached.py": [
-         "2776950b0eccbe16ae74dde21906cb0dc30140d7",
+         "2c747f135a1c450bd20dc04806f5d0e4aeeda2f0",
          [
           null,
           {}
diff --git a/tests/wpt/meta/css/CSS2/floats/float-no-interpolation.html.ini b/tests/wpt/meta/css/CSS2/floats/float-no-interpolation.html.ini
index 892e67bc160..3f08ae0f698 100644
--- a/tests/wpt/meta/css/CSS2/floats/float-no-interpolation.html.ini
+++ b/tests/wpt/meta/css/CSS2/floats/float-no-interpolation.html.ini
@@ -37,3 +37,39 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <float> from [initial\] to [right\] at (0.3) should be [initial\]]
     expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (-1) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0.4) should be [left\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (0.5) should be [right\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (1) should be [right\]]
+    expected: FAIL
+
+  [Web Animations: property <float> from [left\] to [right\] at (1.5) should be [right\]]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/lists/counter-increment-auto-reset-001.xht.ini b/tests/wpt/meta/css/CSS2/lists/counter-increment-auto-reset-001.xht.ini
new file mode 100644
index 00000000000..4eafbea05a0
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/lists/counter-increment-auto-reset-001.xht.ini
@@ -0,0 +1,2 @@
+[counter-increment-auto-reset-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/lists/counter-increment-display-001.xht.ini b/tests/wpt/meta/css/CSS2/lists/counter-increment-display-001.xht.ini
new file mode 100644
index 00000000000..1f037062b89
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/lists/counter-increment-display-001.xht.ini
@@ -0,0 +1,2 @@
+[counter-increment-display-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/lists/counter-increment-not-generated-001.xht.ini b/tests/wpt/meta/css/CSS2/lists/counter-increment-not-generated-001.xht.ini
new file mode 100644
index 00000000000..794f5570837
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/lists/counter-increment-not-generated-001.xht.ini
@@ -0,0 +1,2 @@
+[counter-increment-not-generated-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/lists/counter-reset-display-001.xht.ini b/tests/wpt/meta/css/CSS2/lists/counter-reset-display-001.xht.ini
new file mode 100644
index 00000000000..400eee77ae1
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/lists/counter-reset-display-001.xht.ini
@@ -0,0 +1,2 @@
+[counter-reset-display-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/lists/counter-reset-not-generated-001.xht.ini b/tests/wpt/meta/css/CSS2/lists/counter-reset-not-generated-001.xht.ini
new file mode 100644
index 00000000000..97f44577fed
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/lists/counter-reset-not-generated-001.xht.ini
@@ -0,0 +1,2 @@
+[counter-reset-not-generated-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini b/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini
new file mode 100644
index 00000000000..3c1eac87f60
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht.ini
@@ -0,0 +1,2 @@
+[margin-collapse-clear-001.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini b/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini
new file mode 100644
index 00000000000..188c0a7354c
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht.ini
@@ -0,0 +1,2 @@
+[margin-collapse-clear-007.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini b/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini
new file mode 100644
index 00000000000..1d4a4623f91
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-016.xht.ini
@@ -0,0 +1,2 @@
+[padding-applies-to-016.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini b/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini
new file mode 100644
index 00000000000..02c94e9fa6f
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/margin-padding-clear/padding-applies-to-017.xht.ini
@@ -0,0 +1,2 @@
+[padding-applies-to-017.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-007.xht.ini b/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-007.xht.ini
new file mode 100644
index 00000000000..86bd1e058f4
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-007.xht.ini
@@ -0,0 +1,2 @@
+[first-line-pseudo-007.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-008.xht.ini b/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-008.xht.ini
new file mode 100644
index 00000000000..0f43b45c00e
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/selectors/first-line-pseudo-008.xht.ini
@@ -0,0 +1,2 @@
+[first-line-pseudo-008.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/CSS2/selectors/first-line-selector-004.xht.ini b/tests/wpt/meta/css/CSS2/selectors/first-line-selector-004.xht.ini
new file mode 100644
index 00000000000..6adda0b1240
--- /dev/null
+++ b/tests/wpt/meta/css/CSS2/selectors/first-line-selector-004.xht.ini
@@ -0,0 +1,2 @@
+[first-line-selector-004.xht]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini b/tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions.html.ini
similarity index 67%
rename from tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini
rename to tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions.html.ini
index fcc2d8205dd..2d7ef3e268f 100644
--- a/tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions-tentative.html.ini
+++ b/tests/wpt/meta/css/css-borders/border-image-width-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[border-image-width-interpolation-math-functions-tentative.html]
+[border-image-width-interpolation-math-functions.html]
   [CSS Transitions: property <border-image-width> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <border-image-width> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions with transition: all: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [Web Animations: property <border-image-width> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
diff --git a/tests/wpt/meta/css/css-color/parsing/color-computed-relative-color.html.ini b/tests/wpt/meta/css/css-color/parsing/color-computed-relative-color.html.ini
index 718a1bf8f6b..bf29c753411 100644
--- a/tests/wpt/meta/css/css-color/parsing/color-computed-relative-color.html.ini
+++ b/tests/wpt/meta/css/css-color/parsing/color-computed-relative-color.html.ini
@@ -3322,3 +3322,51 @@
 
   [Property color value 'color(from color(srgb 0.25 0.5 0.75) xyz-d65 x y z)']
     expected: FAIL
+
+  [Property color value 'rgb(from color-mix(in srgb, red, red) r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'hsl(from color-mix(in srgb, red, red) h s l / alpha)']
+    expected: FAIL
+
+  [Property color value 'hwb(from color-mix(in srgb, red, red) h w b / alpha)']
+    expected: FAIL
+
+  [Property color value 'lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)']
+    expected: FAIL
+
+  [Property color value 'oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)']
+    expected: FAIL
+
+  [Property color value 'lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)']
+    expected: FAIL
+
+  [Property color value 'oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(srgb 0.7 0.5 0.3), color(srgb 0.7 0.5 0.3)) srgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(srgb-linear 0.7 0.5 0.3), color(srgb-linear 0.7 0.5 0.3)) srgb-linear r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(a98-rgb 0.7 0.5 0.3), color(a98-rgb 0.7 0.5 0.3)) a98-rgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(rec2020 0.7 0.5 0.3), color(rec2020 0.7 0.5 0.3)) rec2020 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(prophoto-rgb 0.7 0.5 0.3), color(prophoto-rgb 0.7 0.5 0.3)) prophoto-rgb r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(display-p3 0.7 0.5 0.3), color(display-p3 0.7 0.5 0.3)) display-p3 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz 0.7 0.5 0.3), color(xyz 0.7 0.5 0.3)) xyz r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz-d50 0.7 0.5 0.3), color(xyz-d50 0.7 0.5 0.3)) xyz-d50 r g b / alpha)']
+    expected: FAIL
+
+  [Property color value 'color(from color-mix(in xyz, color(xyz-d65 0.7 0.5 0.3), color(xyz-d65 0.7 0.5 0.3)) xyz-d65 r g b / alpha)']
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-color/parsing/color-valid-relative-color.html.ini b/tests/wpt/meta/css/css-color/parsing/color-valid-relative-color.html.ini
index 53aa01a0c08..3a3198a2980 100644
--- a/tests/wpt/meta/css/css-color/parsing/color-valid-relative-color.html.ini
+++ b/tests/wpt/meta/css/css-color/parsing/color-valid-relative-color.html.ini
@@ -3235,3 +3235,51 @@
 
   [e.style['color'\] = "oklch(from oklch(0.7 0.2 300) l c calc(h * 2.5))" should set the property value]
     expected: FAIL
+
+  [e.style['color'\] = "rgb(from color-mix(in srgb, red, red) r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "hsl(from color-mix(in srgb, red, red) h s l / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "hwb(from color-mix(in srgb, red, red) h w b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(srgb 0.7 0.5 0.3), color(srgb 0.7 0.5 0.3)) srgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(srgb-linear 0.7 0.5 0.3), color(srgb-linear 0.7 0.5 0.3)) srgb-linear r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(a98-rgb 0.7 0.5 0.3), color(a98-rgb 0.7 0.5 0.3)) a98-rgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(rec2020 0.7 0.5 0.3), color(rec2020 0.7 0.5 0.3)) rec2020 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(prophoto-rgb 0.7 0.5 0.3), color(prophoto-rgb 0.7 0.5 0.3)) prophoto-rgb r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(display-p3 0.7 0.5 0.3), color(display-p3 0.7 0.5 0.3)) display-p3 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz 0.7 0.5 0.3), color(xyz 0.7 0.5 0.3)) xyz r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz-d50 0.7 0.5 0.3), color(xyz-d50 0.7 0.5 0.3)) xyz-d50 r g b / alpha)" should set the property value]
+    expected: FAIL
+
+  [e.style['color'\] = "color(from color-mix(in xyz, color(xyz-d65 0.7 0.5 0.3), color(xyz-d65 0.7 0.5 0.3)) xyz-d65 r g b / alpha)" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini b/tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
similarity index 67%
rename from tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini
rename to tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
index ac7fa1b4461..5aee51bfe8c 100644
--- a/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html.ini
+++ b/tests/wpt/meta/css/css-fonts/font-size-adjust-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[font-size-adjust-interpolation-math-functions.tentative.html]
+[font-size-adjust-interpolation-math-functions.html]
   [CSS Transitions: property <font-size-adjust> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <font-size-adjust> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Transitions with transition: all: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [CSS Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (-1) should be [20\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0) should be [100\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.125) should be [110\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (0.875) should be [170\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (1) should be [180\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
     expected: FAIL
 
-  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(progress(10rem from 20px to 100px) * 180)\] at (2) should be [260\]]
+  [Web Animations: property <font-size-adjust> from [calc(sign(20rem - 20px) * 100)\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
     expected: FAIL
diff --git a/tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini b/tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
similarity index 68%
rename from tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini
rename to tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
index 30f9f12ae64..f1553f90850 100644
--- a/tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html.ini
+++ b/tests/wpt/meta/css/css-fonts/font-stretch-interpolation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[font-stretch-interpolation-math-functions.tentative.html]
+[font-stretch-interpolation-math-functions.html]
   [CSS Transitions: property <font-stretch> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
@@ -71,74 +71,74 @@
   [Web Animations: property <font-stretch> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Transitions: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Transitions with transition: all: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [CSS Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
     expected: FAIL
 
-  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+  [Web Animations: property <font-stretch> from [calc(sign(20rem - 20px) * 100%)\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
     expected: FAIL
diff --git a/tests/wpt/meta/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini b/tests/wpt/meta/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini
new file mode 100644
index 00000000000..82db1df1d80
--- /dev/null
+++ b/tests/wpt/meta/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html.ini
@@ -0,0 +1,216 @@
+[image-slice-interpolation-math-functions-tentative.html]
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (-1) should be [20\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0) should be [100\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.125) should be [110\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (0.875) should be [170\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (1) should be [180\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100\] to [calc(sign(20rem - 20px) * 180)\] at (2) should be [260\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [100%\] to [calc(sign(20rem - 20px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [CSS Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (-1) should be [20%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0) should be [100%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.125) should be [110%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (0.875) should be [170%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (1) should be [180%\]]
+    expected: FAIL
+
+  [Web Animations: property <border-image-slice> from [calc(sign(20rem - 20px) * 100%)\] to [calc(progress(10rem from 20px to 100px) * 180%)\] at (2) should be [260%\]]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-position/animations/position-interpolation.html.ini b/tests/wpt/meta/css/css-position/animations/position-interpolation.html.ini
index 474800021cf..80d094f4c6f 100644
--- a/tests/wpt/meta/css/css-position/animations/position-interpolation.html.ini
+++ b/tests/wpt/meta/css/css-position/animations/position-interpolation.html.ini
@@ -37,3 +37,75 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <position> from [absolute\] to [static\] at (0.3) should be [absolute\]]
     expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (-1) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0.4) should be [relative\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (0.5) should be [static\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (1) should be [static\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [relative\] to [static\] at (1.5) should be [static\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (-1) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0.4) should be [sticky\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (0.5) should be [fixed\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (1) should be [fixed\]]
+    expected: FAIL
+
+  [Web Animations: property <position> from [sticky\] to [fixed\] at (1.5) should be [fixed\]]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-text/text-align/text-align-last-interpolation.html.ini b/tests/wpt/meta/css/css-text/text-align/text-align-last-interpolation.html.ini
index 3099f99dbfc..b6f4dc5c733 100644
--- a/tests/wpt/meta/css/css-text/text-align/text-align-last-interpolation.html.ini
+++ b/tests/wpt/meta/css/css-text/text-align/text-align-last-interpolation.html.ini
@@ -155,18 +155,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.5) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.6) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1.5) should be [start\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (-0.3) should be [auto\]]
     expected: FAIL
 
@@ -176,18 +164,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.5) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (0.6) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1) should be [start\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [auto\] to [start\] at (1.5) should be [start\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (-0.3) should be [justify\]]
     expected: FAIL
 
@@ -197,18 +173,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.3) should be [justify\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.5) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.6) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1.5) should be [center\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (-0.3) should be [justify\]]
     expected: FAIL
 
@@ -218,18 +182,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.3) should be [justify\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.5) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (0.6) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1) should be [center\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [justify\] to [center\] at (1.5) should be [center\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (-0.3) should be [left\]]
     expected: FAIL
 
@@ -239,18 +191,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.3) should be [left\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.5) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.6) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (1) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [left\] to [right\] at (1.5) should be [right\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (-0.3) should be [left\]]
     expected: FAIL
 
@@ -260,18 +200,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.3) should be [left\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.5) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (0.6) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (1) should be [right\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-align-last> from [left\] to [right\] at (1.5) should be [right\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-align-last> from [end\] to [match-parent\] at (-0.3) should be [end\]]
     expected: FAIL
 
diff --git a/tests/wpt/meta/css/css-text/text-justify/text-justify-interpolation.html.ini b/tests/wpt/meta/css/css-text/text-justify/text-justify-interpolation.html.ini
index 4c5ce7f2e32..3884f88498b 100644
--- a/tests/wpt/meta/css/css-text/text-justify/text-justify-interpolation.html.ini
+++ b/tests/wpt/meta/css/css-text/text-justify/text-justify-interpolation.html.ini
@@ -158,18 +158,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.5) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.6) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (1) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (1.5) should be [inter-word\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (-0.3) should be [auto\]]
     expected: FAIL
 
@@ -179,18 +167,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.5) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (0.6) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (1) should be [inter-word\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-word\] at (1.5) should be [inter-word\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (-0.3) should be [auto\]]
     expected: FAIL
 
@@ -200,18 +176,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.5) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.6) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (1) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (1.5) should be [inter-character\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (-0.3) should be [auto\]]
     expected: FAIL
 
@@ -221,60 +185,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.3) should be [auto\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.5) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (0.6) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (1) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [auto\] to [inter-character\] at (1.5) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (-0.3) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.3) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.5) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.6) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (1) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (1.5) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (-0.3) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.3) should be [inter-character\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.5) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (0.6) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (1) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-character\] to [distribute\] at (1.5) should be [distribute\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (-0.3) should be [inter-word\]]
     expected: FAIL
 
@@ -284,18 +194,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.3) should be [inter-word\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.5) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.6) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (1) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (1.5) should be [distribute\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (-0.3) should be [inter-word\]]
     expected: FAIL
 
@@ -305,18 +203,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.3) should be [inter-word\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.5) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (0.6) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (1) should be [distribute\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [inter-word\] to [distribute\] at (1.5) should be [distribute\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (-0.3) should be [distribute\]]
     expected: FAIL
 
@@ -326,18 +212,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.3) should be [distribute\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.5) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.6) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (1) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <text-justify> from [distribute\] to [none\] at (1.5) should be [none\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (-0.3) should be [distribute\]]
     expected: FAIL
 
@@ -346,15 +220,3 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.3) should be [distribute\]]
     expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.5) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (0.6) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (1) should be [none\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <text-justify> from [distribute\] to [none\] at (1.5) should be [none\]]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-001.html.ini b/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-001.html.ini
deleted file mode 100644
index ded993140eb..00000000000
--- a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-001.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[text-transform-full-size-kana-001.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-002.html.ini b/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-002.html.ini
deleted file mode 100644
index 047905d059b..00000000000
--- a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-002.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[text-transform-full-size-kana-002.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-003.html.ini b/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-003.html.ini
deleted file mode 100644
index 7e9e3e15a50..00000000000
--- a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-003.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[text-transform-full-size-kana-003.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-004.html.ini b/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-004.html.ini
deleted file mode 100644
index f90c86d0e3d..00000000000
--- a/tests/wpt/meta/css/css-text/text-transform/text-transform-full-size-kana-004.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[text-transform-full-size-kana-004.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-transitions/all-with-discrete.tentative.html.ini b/tests/wpt/meta/css/css-transitions/all-with-discrete.tentative.html.ini
deleted file mode 100644
index 0a425b104e1..00000000000
--- a/tests/wpt/meta/css/css-transitions/all-with-discrete.tentative.html.ini
+++ /dev/null
@@ -1,12 +0,0 @@
-[all-with-discrete.tentative.html]
-  [all with an explicit discrete property should animate.]
-    expected: FAIL
-
-  [all without an explicit discrete property should not animate.]
-    expected: FAIL
-
-  [transition:all with transition-animation-type:discrete should animate discrete properties.]
-    expected: FAIL
-
-  [transition:all with transition-behavior:allow-discrete should animate discrete properties.]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-transitions/animations/vertical-align-interpolation.html.ini b/tests/wpt/meta/css/css-transitions/animations/vertical-align-interpolation.html.ini
index d7f61342ae5..855bcba2eae 100644
--- a/tests/wpt/meta/css/css-transitions/animations/vertical-align-interpolation.html.ini
+++ b/tests/wpt/meta/css/css-transitions/animations/vertical-align-interpolation.html.ini
@@ -242,18 +242,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.3) should be [initial\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.5) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.6) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (1) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (1.5) should be [40px\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (-0.3) should be [initial\]]
     expected: FAIL
 
@@ -263,18 +251,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.3) should be [initial\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.5) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (0.6) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (1) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [initial\] to [40px\] at (1.5) should be [40px\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (-0.3) should be [unset\]]
     expected: FAIL
 
@@ -284,18 +260,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.3) should be [unset\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.5) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.6) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (1) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (1.5) should be [40px\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (-0.3) should be [unset\]]
     expected: FAIL
 
@@ -305,18 +269,6 @@
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.3) should be [unset\]]
     expected: FAIL
 
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.5) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (0.6) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (1) should be [40px\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [unset\] to [40px\] at (1.5) should be [40px\]]
-    expected: FAIL
-
   [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (-0.3) should be [super\]]
     expected: FAIL
 
@@ -326,18 +278,6 @@
   [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.3) should be [super\]]
     expected: FAIL
 
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.5) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.6) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (1) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-behavior:allow-discrete: property <vertical-align> from [super\] to [40%\] at (1.5) should be [40%\]]
-    expected: FAIL
-
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (-0.3) should be [super\]]
     expected: FAIL
 
@@ -346,15 +286,3 @@
 
   [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.3) should be [super\]]
     expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.5) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (0.6) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (1) should be [40%\]]
-    expected: FAIL
-
-  [CSS Transitions with transition-property:all and transition-behavor:allow-discrete: property <vertical-align> from [super\] to [40%\] at (1.5) should be [40%\]]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-transitions/transition-behaivor.html.ini b/tests/wpt/meta/css/css-transitions/transition-behaivor.html.ini
new file mode 100644
index 00000000000..be999af2dc0
--- /dev/null
+++ b/tests/wpt/meta/css/css-transitions/transition-behaivor.html.ini
@@ -0,0 +1,18 @@
+[transition-behaivor.html]
+  [transition-behavior:allow-discrete should animate discrete properties.]
+    expected: FAIL
+
+  [transition-behavior:allow-discrete overlaps the previous normal value.]
+    expected: FAIL
+
+  [transition-behavior:normal overlaps the previous allow-discrete value.]
+    expected: FAIL
+
+  [transition-behavior changed to normal should stop the running discrete transitions.]
+    expected: FAIL
+
+  [transition-behavior:allow-discrete should animate for values fallback to discrete animations.]
+    expected: FAIL
+
+  [transition-behavior:normal should cancel the running transitions whose animation values are not interpolatable]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-ui/parsing/user-find-computed.tentative.html.ini b/tests/wpt/meta/css/css-ui/parsing/user-find-computed.tentative.html.ini
deleted file mode 100644
index 7a52f8415e9..00000000000
--- a/tests/wpt/meta/css/css-ui/parsing/user-find-computed.tentative.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[user-find-computed.tentative.html]
-  [Property user-find value 'auto']
-    expected: FAIL
-
-  [Property user-find value 'none']
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-ui/parsing/user-find-valid.tentative.html.ini b/tests/wpt/meta/css/css-ui/parsing/user-find-valid.tentative.html.ini
deleted file mode 100644
index 5484a92303f..00000000000
--- a/tests/wpt/meta/css/css-ui/parsing/user-find-valid.tentative.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[user-find-valid.tentative.html]
-  [e.style['user-find'\] = "auto" should set the property value]
-    expected: FAIL
-
-  [e.style['user-find'\] = "none" should set the property value]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-ui/user-find.tentative.html.ini b/tests/wpt/meta/css/css-ui/user-find.tentative.html.ini
deleted file mode 100644
index 2455027f9c7..00000000000
--- a/tests/wpt/meta/css/css-ui/user-find.tentative.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[user-find.tentative.html]
-  [Basic test for the user-find property]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions-tentative.html.ini b/tests/wpt/meta/css/css-variables/variables-animation-math-functions.html.ini
similarity index 68%
rename from tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions-tentative.html.ini
rename to tests/wpt/meta/css/css-variables/variables-animation-math-functions.html.ini
index fc4c1ab570a..c116f3a7393 100644
--- a/tests/wpt/meta-legacy-layout/css/css-variables/variables-animation-math-functions-tentative.html.ini
+++ b/tests/wpt/meta/css/css-variables/variables-animation-math-functions.html.ini
@@ -1,4 +1,4 @@
-[variables-animation-math-functions-tentative.html]
+[variables-animation-math-functions.html]
   [CSS Transitions: property <--my-angle> from [100deg\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
@@ -53,56 +53,56 @@
   [Web Animations: property <--my-angle> from [100deg\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [CSS Transitions: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [CSS Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (-1) should be [20deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (-1) should be [20deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0) should be [100deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0) should be [100deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.125) should be [110deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.125) should be [110deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (0.875) should be [170deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (0.875) should be [170deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (1) should be [180deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (1) should be [180deg\]]
     expected: FAIL
 
-  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(progress(10rem from 20px to 100px) * 180deg)\] at (2) should be [260deg\]]
+  [Web Animations: property <--my-angle> from [calc(sign(20rem - 20px) * 100deg)\] to [calc(sign(20rem - 20px) * 180deg)\] at (2) should be [260deg\]]
     expected: FAIL
diff --git a/tests/wpt/meta/css/filter-effects/backdrop-filter-clip-rect-2.html.ini b/tests/wpt/meta/css/filter-effects/backdrop-filter-clip-rect-2.html.ini
new file mode 100644
index 00000000000..1faf9f58f50
--- /dev/null
+++ b/tests/wpt/meta/css/filter-effects/backdrop-filter-clip-rect-2.html.ini
@@ -0,0 +1,2 @@
+[backdrop-filter-clip-rect-2.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/dom/nodes/Document-createEvent.https.html.ini b/tests/wpt/meta/dom/nodes/Document-createEvent.https.html.ini
index 717d6d5da96..174446ca75f 100644
--- a/tests/wpt/meta/dom/nodes/Document-createEvent.https.html.ini
+++ b/tests/wpt/meta/dom/nodes/Document-createEvent.https.html.ini
@@ -73,3 +73,12 @@
 
   [createEvent('TOUCHEVENT') should be initialized correctly.]
     expected: PRECONDITION_FAILED
+
+  [TextEvent should be an alias for TextEvent.]
+    expected: FAIL
+
+  [textevent should be an alias for TextEvent.]
+    expected: FAIL
+
+  [TEXTEVENT should be an alias for TextEvent.]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini b/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini
new file mode 100644
index 00000000000..b9a477ad044
--- /dev/null
+++ b/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js.ini
@@ -0,0 +1,3 @@
+[insertion-removing-steps-iframe.window.html]
+  [Insertion steps: load event fires synchronously *after* iframe DOM insertion, as part of the iframe element's insertion steps]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini b/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini
new file mode 100644
index 00000000000..d1ba832db34
--- /dev/null
+++ b/tests/wpt/meta/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js.ini
@@ -0,0 +1,2 @@
+[insertion-removing-steps-script.window.html]
+  expected: ERROR
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-constructor.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-constructor.any.js.ini
index e132211192b..3997fbb757a 100644
--- a/tests/wpt/meta/dom/observable/tentative/observable-constructor.any.js.ini
+++ b/tests/wpt/meta/dom/observable/tentative/observable-constructor.any.js.ini
@@ -107,6 +107,9 @@
   [Subscriber signal is readonly]
     expected: FAIL
 
+  [Subscriber#error() value is stored as Subscriber's AbortSignal's reason]
+    expected: FAIL
+
 
 [observable-constructor.any.html]
   [Observable constructor]
@@ -216,3 +219,6 @@
 
   [Subscriber signal is readonly]
     expected: FAIL
+
+  [Subscriber#error() value is stored as Subscriber's AbortSignal's reason]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-drop.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-drop.any.js.ini
new file mode 100644
index 00000000000..b8766633130
--- /dev/null
+++ b/tests/wpt/meta/dom/observable/tentative/observable-drop.any.js.ini
@@ -0,0 +1,44 @@
+[observable-drop.any.worker.html]
+  [drop(): Observable should skip the first n values from the source observable, then pass through the rest of the values and completion]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source Observable]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Observable passes through completions from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Unsubscribing from the Observable returned by drop() also unsubscribes from the source Observable]
+    expected: FAIL
+
+  [drop(): A drop amount of 0 simply mirrors the source Observable]
+    expected: FAIL
+
+  [drop(): Passing negative value wraps to maximum value ]
+    expected: FAIL
+
+
+[observable-drop.any.html]
+  [drop(): Observable should skip the first n values from the source observable, then pass through the rest of the values and completion]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source Observable]
+    expected: FAIL
+
+  [drop(): Observable passes through errors from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Observable passes through completions from source observable even before drop count is met]
+    expected: FAIL
+
+  [drop(): Unsubscribing from the Observable returned by drop() also unsubscribes from the source Observable]
+    expected: FAIL
+
+  [drop(): A drop amount of 0 simply mirrors the source Observable]
+    expected: FAIL
+
+  [drop(): Passing negative value wraps to maximum value ]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-filter.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-filter.any.js.ini
new file mode 100644
index 00000000000..159169b6565
--- /dev/null
+++ b/tests/wpt/meta/dom/observable/tentative/observable-filter.any.js.ini
@@ -0,0 +1,32 @@
+[observable-filter.any.html]
+  [filter(): Returned Observable filters out results based on predicate]
+    expected: FAIL
+
+  [filter(): Errors thrown in filter predicate are emitted to Observer error() handler]
+    expected: FAIL
+
+  [filter(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [filter(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [filter(): Upon source completion, source Observable teardown sequence happens after downstream filter complete() is called]
+    expected: FAIL
+
+
+[observable-filter.any.worker.html]
+  [filter(): Returned Observable filters out results based on predicate]
+    expected: FAIL
+
+  [filter(): Errors thrown in filter predicate are emitted to Observer error() handler]
+    expected: FAIL
+
+  [filter(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [filter(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [filter(): Upon source completion, source Observable teardown sequence happens after downstream filter complete() is called]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-map.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-map.any.js.ini
new file mode 100644
index 00000000000..b3836581f2d
--- /dev/null
+++ b/tests/wpt/meta/dom/observable/tentative/observable-map.any.js.ini
@@ -0,0 +1,38 @@
+[observable-map.any.html]
+  [map(): Maps values correctly]
+    expected: FAIL
+
+  [map(): Mapper errors are emitted to Observer error() handler]
+    expected: FAIL
+
+  [map(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [map(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [map(): Upon source completion, source Observable teardown sequence happens before downstream mapper complete() is called]
+    expected: FAIL
+
+  [map(): Map observable unsubscription causes source Observable unsubscription. Mapper Observer's complete()/error() are not called]
+    expected: FAIL
+
+
+[observable-map.any.worker.html]
+  [map(): Maps values correctly]
+    expected: FAIL
+
+  [map(): Mapper errors are emitted to Observer error() handler]
+    expected: FAIL
+
+  [map(): Passes complete() through from source Observable]
+    expected: FAIL
+
+  [map(): Passes error() through from source Observable]
+    expected: FAIL
+
+  [map(): Upon source completion, source Observable teardown sequence happens before downstream mapper complete() is called]
+    expected: FAIL
+
+  [map(): Map observable unsubscription causes source Observable unsubscription. Mapper Observer's complete()/error() are not called]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-map.window.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-map.window.js.ini
new file mode 100644
index 00000000000..7c6b17b7a58
--- /dev/null
+++ b/tests/wpt/meta/dom/observable/tentative/observable-map.window.js.ini
@@ -0,0 +1,3 @@
+[observable-map.window.html]
+  [map()'s internal observer's next steps do not crash in a detached document]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-take.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-take.any.js.ini
new file mode 100644
index 00000000000..6265257fb42
--- /dev/null
+++ b/tests/wpt/meta/dom/observable/tentative/observable-take.any.js.ini
@@ -0,0 +1,32 @@
+[observable-take.any.worker.html]
+  [take(): Takes the first N values from the source observable, then completes]
+    expected: FAIL
+
+  [take(): Forwards complete()s that happen before the take count is met, and unsubscribes from source Observable]
+    expected: FAIL
+
+  [take(): Should forward errors from the source observable]
+    expected: FAIL
+
+  [take(): take(0) should not subscribe to the source observable, and should return an observable that immediately completes]
+    expected: FAIL
+
+  [take(): Negative count is treated as maximum value]
+    expected: FAIL
+
+
+[observable-take.any.html]
+  [take(): Takes the first N values from the source observable, then completes]
+    expected: FAIL
+
+  [take(): Forwards complete()s that happen before the take count is met, and unsubscribes from source Observable]
+    expected: FAIL
+
+  [take(): Should forward errors from the source observable]
+    expected: FAIL
+
+  [take(): take(0) should not subscribe to the source observable, and should return an observable that immediately completes]
+    expected: FAIL
+
+  [take(): Negative count is treated as maximum value]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/observable/tentative/observable-takeUntil.any.js.ini b/tests/wpt/meta/dom/observable/tentative/observable-takeUntil.any.js.ini
index e799d7864a3..e792b882a69 100644
--- a/tests/wpt/meta/dom/observable/tentative/observable-takeUntil.any.js.ini
+++ b/tests/wpt/meta/dom/observable/tentative/observable-takeUntil.any.js.ini
@@ -32,6 +32,15 @@
   [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
     expected: FAIL
 
+  [takeUntil: notifier next() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier error() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier throw Error unsubscribes from notifier]
+    expected: FAIL
+
 
 [observable-takeUntil.any.worker.html]
   [takeUntil subscribes to source Observable and mirrors it uninterrupted]
@@ -66,3 +75,12 @@
 
   [takeUntil: notifier calls `Subscriber#error()` twice; second goes to global error handler]
     expected: FAIL
+
+  [takeUntil: notifier next() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier error() unsubscribes from notifier]
+    expected: FAIL
+
+  [takeUntil: notifier throw Error unsubscribes from notifier]
+    expected: FAIL
diff --git a/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
index 4b5c3e26586..7b4cf2c5ae7 100644
--- a/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -185,3 +185,6 @@
 
   [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
     expected: FAIL
+
+  [background-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/gamepad/gamepad-secure-context.html.ini b/tests/wpt/meta/gamepad/gamepad-secure-context.html.ini
deleted file mode 100644
index 08805696a51..00000000000
--- a/tests/wpt/meta/gamepad/gamepad-secure-context.html.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[gamepad-secure-context.html]
-  [When in a non-secure context, getGamepad() should throw an error.]
-    expected: FAIL
-
-  [Gamepad API is not exposed in insecure contexts]
-    expected: FAIL
-
-  [Gamepad API is not exposed in non-secure contexts]
-    expected: FAIL
diff --git a/tests/wpt/meta/gamepad/idlharness.https.window.js.ini b/tests/wpt/meta/gamepad/idlharness.window.js.ini
similarity index 97%
rename from tests/wpt/meta/gamepad/idlharness.https.window.js.ini
rename to tests/wpt/meta/gamepad/idlharness.window.js.ini
index 55ec1643e45..37c2bd87ea1 100644
--- a/tests/wpt/meta/gamepad/idlharness.https.window.js.ini
+++ b/tests/wpt/meta/gamepad/idlharness.window.js.ini
@@ -1,13 +1,4 @@
-[idlharness.https.window.html]
-  [GamepadEvent must be primary interface of new GamepadEvent("gamepad")]
-    expected: FAIL
-
-  [GamepadEvent interface: new GamepadEvent("gamepad") must inherit property "gamepad" with the proper type]
-    expected: FAIL
-
-  [Stringification of new GamepadEvent("gamepad")]
-    expected: FAIL
-
+[idlharness.window.html]
   [Gamepad interface: attribute vibrationActuator]
     expected: FAIL
 
@@ -37,3 +28,12 @@
 
   [GamepadHapticActuator interface: operation reset()]
     expected: FAIL
+
+  [GamepadEvent must be primary interface of new GamepadEvent("gamepad")]
+    expected: FAIL
+
+  [Stringification of new GamepadEvent("gamepad")]
+    expected: FAIL
+
+  [GamepadEvent interface: new GamepadEvent("gamepad") must inherit property "gamepad" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/gamepad/not-fully-active.https.html.ini b/tests/wpt/meta/gamepad/not-fully-active.html.ini
similarity index 71%
rename from tests/wpt/meta-legacy-layout/gamepad/not-fully-active.https.html.ini
rename to tests/wpt/meta/gamepad/not-fully-active.html.ini
index f0eac5a9f3a..1b5a91a41e7 100644
--- a/tests/wpt/meta-legacy-layout/gamepad/not-fully-active.https.html.ini
+++ b/tests/wpt/meta/gamepad/not-fully-active.html.ini
@@ -1,3 +1,3 @@
-[not-fully-active.https.html]
+[not-fully-active.html]
   [calling getGamepads() in a non-fully-active document]
     expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js.ini b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js.ini
index 5a245d61359..bcda478adb1 100644
--- a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js.ini
+++ b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js.ini
@@ -1,6 +1,10 @@
 [javascript-url-referrer.window.html]
+  expected: TIMEOUT
   [unsafe-url referrer policy used to create the starting page]
     expected: FAIL
 
   [origin referrer policy used to create the starting page]
     expected: FAIL
+
+  [no-referrer referrer policy used to create the starting page]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
deleted file mode 100644
index 7a5fcb79165..00000000000
--- a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[traverse_the_history_5.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
diff --git a/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini
new file mode 100644
index 00000000000..282b90eb5b0
--- /dev/null
+++ b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-dataChange.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini
new file mode 100644
index 00000000000..3aa6f198cd2
--- /dev/null
+++ b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-replace.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini
new file mode 100644
index 00000000000..c61fc8cf968
--- /dev/null
+++ b/tests/wpt/meta/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html.ini
@@ -0,0 +1,2 @@
+[dir-auto-dynamic-simple-textContent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini b/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
index 16db1ea9c58..ddd65fdcec8 100644
--- a/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@@ -1,16 +1,15 @@
 [supported-elements.html]
-  expected: TIMEOUT
   [Contenteditable element should support autofocus]
     expected: FAIL
 
   [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Element with tabindex should support autofocus]
     expected: FAIL
 
   [Area element should support autofocus]
-    expected: NOTRUN
+    expected: FAIL
 
   [Host element with delegatesFocus should support autofocus]
     expected: FAIL
diff --git a/tests/wpt/meta/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini b/tests/wpt/meta/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
index 6165716b2e7..00715d114cb 100644
--- a/tests/wpt/meta/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
+++ b/tests/wpt/meta/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html.ini
@@ -148,3 +148,261 @@
 
   [UA stylesheet rule for unicode-bidi, for <output>]
     expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <a>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <abbr>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <area>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <audio>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <b>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <base>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <body>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <br>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <button>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <canvas>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <cite>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <code>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <data>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <datalist>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <del>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <details>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <dfn>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <dialog>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <em>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <embed>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <fieldset>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <head>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <html>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <i>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <iframe>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <img>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <ins>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <kbd>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <label>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <link>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <map>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <mark>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <meta>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <meter>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <noscript>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <object>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <optgroup>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <option>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <param>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <progress>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <q>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <rp>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <rt>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <ruby>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <s>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <samp>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <script>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <select>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <slot>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <small>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <source>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <span>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <strong>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <style>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <sub>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <sup>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <template>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <time>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <title>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <track>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <u>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <var>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <video>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <wbr>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <bdo>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=hidden>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=text>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=search>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=tel>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=url>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=email>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=password>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=date>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=time>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=datetime-local>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=number>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=range>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=color>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=checkbox>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=radio>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=file>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=submit>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=image>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=reset>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <input type=button>]
+    expected: FAIL
+
+  [UA stylesheet rule for unicode-bidi, for <textarea>]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini b/tests/wpt/meta/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
index fd0a4743026..246e55deb7e 100644
--- a/tests/wpt/meta/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
+++ b/tests/wpt/meta/html/semantics/embedded-content/media-elements/track/track-element/no-cuechange-before-play.html.ini
@@ -1,4 +1,4 @@
 [no-cuechange-before-play.html]
+  expected: TIMEOUT
   [Ensure that the 'cuechange' event is not fired before video playback has begun.]
-    expected: FAIL
-
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/meta/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 6a420504feb..7da2bc5ac80 100644
--- a/tests/wpt/meta/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/meta/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,3 +1,4 @@
 [iframe_sandbox_popups_escaping-3.html]
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/forms/historical.html.ini b/tests/wpt/meta/html/semantics/forms/historical.html.ini
similarity index 100%
rename from tests/wpt/meta-legacy-layout/html/semantics/forms/historical.html.ini
rename to tests/wpt/meta/html/semantics/forms/historical.html.ini
diff --git a/tests/wpt/meta/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini b/tests/wpt/meta/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini
new file mode 100644
index 00000000000..e0fca770e18
--- /dev/null
+++ b/tests/wpt/meta/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html.ini
@@ -0,0 +1,6 @@
+[popover-shadow-dom-anchor.tentative.html]
+  [anchor references do not cross shadow boundaries]
+    expected: FAIL
+
+  [anchor references use the flat tree not the DOM tree]
+    expected: FAIL
diff --git a/tests/wpt/meta/uievents/textInput/api.html.ini b/tests/wpt/meta/uievents/textInput/api.html.ini
new file mode 100644
index 00000000000..8f034ec4e50
--- /dev/null
+++ b/tests/wpt/meta/uievents/textInput/api.html.ini
@@ -0,0 +1,24 @@
+[api.html]
+  [No constructor]
+    expected: FAIL
+
+  [document.CreateEvent('TextEvent') prototype chain]
+    expected: FAIL
+
+  [initTextEvent('foo')]
+    expected: FAIL
+
+  [initTextEvent('foo', true, true, window, 'bar')]
+    expected: FAIL
+
+  [case sensitivity: textInput vs textinput]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <input>]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <textarea>]
+    expected: FAIL
+
+  [execCommand('insertText', false, 'a'), <div contenteditable="">]
+    expected: FAIL
diff --git a/tests/wpt/meta/webmessaging/without-ports/017.html.ini b/tests/wpt/meta/webmessaging/without-ports/017.html.ini
new file mode 100644
index 00000000000..c7946fc91b4
--- /dev/null
+++ b/tests/wpt/meta/webmessaging/without-ports/017.html.ini
@@ -0,0 +1,4 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/workers/WorkerGlobalScope-close.html.ini b/tests/wpt/meta/workers/WorkerGlobalScope-close.html.ini
deleted file mode 100644
index fe8654e447c..00000000000
--- a/tests/wpt/meta/workers/WorkerGlobalScope-close.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[WorkerGlobalScope-close.html]
-  [Test sending a message after closing.]
-    expected: FAIL
-
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add.any.js
new file mode 100644
index 00000000000..b3071c1f94c
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add.any.js
@@ -0,0 +1,30 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - add with an inline key
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { key: 1, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { keyPath: "key" });
+
+    objStore.add(record);
+};
+
+open_rq.onsuccess = function(e) {
+    const rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .get(record.key);
+
+    rq.onsuccess = t.step_func(function(e) {
+        assert_equals(e.target.result.property, record.property);
+        assert_equals(e.target.result.key, record.key);
+        t.done();
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add.htm
deleted file mode 100644
index 33ea0943886..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add.htm
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - add with an inline key </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { key: 1, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { keyPath: "key" });
-
-        objStore.add(record);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                   .objectStore("store")
-                   .get(record.key);
-
-        rq.onsuccess = t.step_func(function(e) {
-            assert_equals(e.target.result.property, record.property);
-            assert_equals(e.target.result.key, record.key);
-            t.done();
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add10.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add10.any.js
new file mode 100644
index 00000000000..7b93dec16a0
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add10.any.js
@@ -0,0 +1,24 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Attempt to call 'add' without an key parameter when the object store uses out-of-line keys
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+
+    let rq;
+    const objStore = db.createObjectStore("store");
+
+    assert_throws_dom("DataError",
+        function() { rq = objStore.add(record); });
+
+    assert_equals(rq, undefined);
+    t.done();
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add10.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add10.htm
deleted file mode 100644
index d84004250de..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add10.htm
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Attempt to call 'add' without an key parameter when the object store uses out-of-line keys </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-
-        var rq,
-          objStore = db.createObjectStore("store");
-
-        assert_throws_dom("DataError",
-            function() { rq = objStore.add(record); });
-
-        assert_equals(rq, undefined);
-        t.done();
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add11.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add11.any.js
new file mode 100644
index 00000000000..cff8f6f1a02
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add11.any.js
@@ -0,0 +1,24 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Attempt to add a record where the record's key does not meet the constraints of a valid key
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { key: { value: 1 }, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+
+    let rq;
+    const objStore = db.createObjectStore("store", { keyPath: "key" });
+
+    assert_throws_dom("DataError",
+        function() { rq = objStore.add(record); });
+
+    assert_equals(rq, undefined);
+    t.done();
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add11.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add11.htm
deleted file mode 100644
index b1d9f71fd06..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add11.htm
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Attempt to add a record where the record's key does not meet the constraints of a valid key </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { key: { value: 1 }, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-
-        var rq,
-          objStore = db.createObjectStore("store", { keyPath: "key" });
-
-        assert_throws_dom("DataError",
-            function() { rq = objStore.add(record); });
-
-        assert_equals(rq, undefined);
-        t.done();
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add12.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add12.any.js
new file mode 100644
index 00000000000..c7ebe751d7e
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add12.any.js
@@ -0,0 +1,24 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Attempt to add a record where the record's in-line key is not defined
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+
+    let rq;
+    const objStore = db.createObjectStore("store", { keyPath: "key" });
+
+    assert_throws_dom("DataError",
+        function() { rq = objStore.add(record); });
+
+    assert_equals(rq, undefined);
+    t.done();
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add12.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add12.htm
deleted file mode 100644
index fc5a7bcebbe..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add12.htm
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Attempt to add a record where the record's in-line key is not defined </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-
-        var rq,
-          objStore = db.createObjectStore("store", { keyPath: "key" });
-
-        assert_throws_dom("DataError",
-            function() { rq = objStore.add(record); });
-
-        assert_equals(rq, undefined);
-        t.done();
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add13.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add13.any.js
new file mode 100644
index 00000000000..fdd77751c00
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add13.any.js
@@ -0,0 +1,24 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Attempt to add a record where the out of line key provided does not meet the constraints of a valid key
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+
+    let rq;
+    const objStore = db.createObjectStore("store");
+
+    assert_throws_dom("DataError",
+        function() { rq = objStore.add(record, { value: 1 }); });
+
+    assert_equals(rq, undefined);
+    t.done();
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add13.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add13.htm
deleted file mode 100644
index ec82989b01a..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add13.htm
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Attempt to add a record where the out of line key provided does not meet the constraints of a valid key </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-
-        var rq,
-          objStore = db.createObjectStore("store");
-
-        assert_throws_dom("DataError",
-            function() { rq = objStore.add(record, { value: 1 }); });
-
-        assert_equals(rq, undefined);
-        t.done();
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add14.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add14.any.js
new file mode 100644
index 00000000000..9952a6d12c9
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add14.any.js
@@ -0,0 +1,27 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Add a record where a value being indexed does not meet the constraints of a valid key
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { key: 1, indexedProperty: { property: "data" } };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+
+    let rq;
+    const objStore = db.createObjectStore("store", { keyPath: "key" });
+
+    objStore.createIndex("index", "indexedProperty");
+
+    rq = objStore.add(record);
+
+    assert_true(rq instanceof IDBRequest);
+    rq.onsuccess = function() {
+        t.done();
+    }
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add14.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add14.htm
deleted file mode 100644
index 10bf8a18ce4..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add14.htm
+++ /dev/null
@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Add a record where a value being indexed does not meet the constraints of a valid key </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { key: 1, indexedProperty: { property: "data" } };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-
-        var rq,
-          objStore = db.createObjectStore("store", { keyPath: "key" });
-
-        objStore.createIndex("index", "indexedProperty");
-
-        rq = objStore.add(record);
-
-        assert_true(rq instanceof IDBRequest);
-        rq.onsuccess = function() {
-            t.done();
-        }
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add15.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add15.any.js
new file mode 100644
index 00000000000..f1820b0259d
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add15.any.js
@@ -0,0 +1,26 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - If the transaction this IDBObjectStore belongs to has its mode set to readonly, throw ReadOnlyError
+// META: script=resources/support.js
+// @author Intel <http://www.intel.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function (event) {
+    db = event.target.result;
+    db.createObjectStore("store", {keyPath:"pKey"});
+}
+
+open_rq.onsuccess = function (event) {
+    const txn = db.transaction("store", "readonly", {durability: 'relaxed'});
+    const ostore = txn.objectStore("store");
+    t.step(function(){
+        assert_throws_dom("ReadOnlyError", function(){
+            ostore.add({ pKey: "primaryKey_0"});
+        });
+    });
+    t.done();
+}
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add15.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add15.htm
deleted file mode 100644
index a6f897911b2..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add15.htm
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - If the transaction this IDBObjectStore belongs to has its mode set to readonly, throw ReadOnlyError </title>
-<link rel="author" title="Intel" href="http://www.intel.com">
-<link rel="help" href="https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#widl-IDBObjectStore-add-IDBRequest-any-value-any-key">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-<div id="log"></div>
-<script>
-    var db,
-        t = async_test();
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function (event) {
-        db = event.target.result;
-        db.createObjectStore("store", {keyPath:"pKey"});
-    }
-
-    open_rq.onsuccess = function (event) {
-        var txn = db.transaction("store", "readonly", {durability: 'relaxed'});
-        var ostore = txn.objectStore("store");
-        t.step(function(){
-            assert_throws_dom("ReadOnlyError", function(){
-                ostore.add({ pKey: "primaryKey_0"});
-            });
-        });
-        t.done();
-    }
-</script>
-
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add16.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add16.any.js
new file mode 100644
index 00000000000..42f943fd25f
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add16.any.js
@@ -0,0 +1,21 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - If the object store has been deleted, the implementation must throw a DOMException of type InvalidStateError
+// META: script=resources/support.js
+// @author Intel <http://www.intel.com>
+
+'use_strict';
+
+let db;
+let ostore;
+const t = async_test();
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function (event) {
+    db = event.target.result;
+    ostore = db.createObjectStore("store", {keyPath:"pKey"});
+    db.deleteObjectStore("store");
+    assert_throws_dom("InvalidStateError", function(){
+        ostore.add({ pKey: "primaryKey_0"});
+    });
+    t.done();
+}
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add16.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add16.htm
deleted file mode 100644
index 453082340fb..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add16.htm
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - If the object store has been deleted, the implementation must throw a DOMException of type InvalidStateError </title>
-<link rel="author" title="Intel" href="http://www.intel.com">
-<link rel="help" href="https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#widl-IDBObjectStore-add-IDBRequest-any-value-any-key">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-<div id="log"></div>
-<script>
-    var db,
-        ostore,
-        t = async_test();
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function (event) {
-        db = event.target.result;
-        ostore = db.createObjectStore("store", {keyPath:"pKey"});
-        db.deleteObjectStore("store");
-        assert_throws_dom("InvalidStateError", function(){
-            ostore.add({ pKey: "primaryKey_0"});
-        });
-        t.done();
-    }
-</script>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add2.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add2.any.js
new file mode 100644
index 00000000000..ddddb4ca130
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add2.any.js
@@ -0,0 +1,31 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - add with an out-of-line key
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const key = 1;
+const record = { property: "data" };
+
+var open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store");
+
+    objStore.add(record, key);
+};
+
+open_rq.onsuccess = function(e) {
+    const rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .get(key);
+
+    rq.onsuccess = t.step_func(function(e) {
+        assert_equals(e.target.result.property, record.property);
+
+        t.done();
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add2.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add2.htm
deleted file mode 100644
index 6f6e3eab27c..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add2.htm
+++ /dev/null
@@ -1,36 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - add with an out-of-line key </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      key = 1,
-      record = { property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store");
-
-        objStore.add(record, key);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                   .objectStore("store")
-                   .get(key);
-
-        rq.onsuccess = t.step_func(function(e) {
-            assert_equals(e.target.result.property, record.property);
-
-            t.done();
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add3.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add3.any.js
new file mode 100644
index 00000000000..a108f6b132c
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add3.any.js
@@ -0,0 +1,34 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - record with same key already exists
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { key: 1, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { keyPath: "key" });
+    objStore.add(record);
+
+    const rq = objStore.add(record);
+    rq.onsuccess = fail(t, "success on adding duplicate record");
+
+    rq.onerror = t.step_func(function(e) {
+        assert_equals(e.target.error.name, "ConstraintError");
+        assert_equals(rq.error.name, "ConstraintError");
+        assert_equals(e.type, "error");
+
+        e.preventDefault();
+        e.stopPropagation();
+    });
+};
+
+// Defer done, giving rq.onsuccess a chance to run
+open_rq.onsuccess = function(e) {
+    t.done();
+}
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add3.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add3.htm
deleted file mode 100644
index 9209e7505da..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add3.htm
+++ /dev/null
@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - record with same key already exists </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { key: 1, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { keyPath: "key" });
-        objStore.add(record);
-
-        var rq = objStore.add(record);
-        rq.onsuccess = fail(t, "success on adding duplicate record")
-
-        rq.onerror = t.step_func(function(e) {
-            assert_equals(e.target.error.name, "ConstraintError");
-            assert_equals(rq.error.name, "ConstraintError");
-            assert_equals(e.type, "error");
-
-            e.preventDefault();
-            e.stopPropagation();
-        });
-    };
-
-    // Defer done, giving rq.onsuccess a chance to run
-    open_rq.onsuccess = function(e) {
-        t.done();
-    }
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add4.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add4.any.js
new file mode 100644
index 00000000000..6a4f61e0d5b
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add4.any.js
@@ -0,0 +1,35 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - add where an index has unique:true specified
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { key: 1, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { autoIncrement: true });
+    objStore.createIndex("i1", "property", { unique: true });
+    objStore.add(record);
+
+    const rq = objStore.add(record);
+    rq.onsuccess = fail(t, "success on adding duplicate indexed record");
+
+    rq.onerror = t.step_func(function(e) {
+        assert_equals(rq.error.name, "ConstraintError");
+        assert_equals(e.target.error.name, "ConstraintError");
+        assert_equals(e.type, "error");
+
+        e.preventDefault();
+        e.stopPropagation();
+    });
+};
+
+// Defer done, giving a spurious rq.onsuccess a chance to run
+open_rq.onsuccess = function(e) {
+    t.done();
+}
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add4.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add4.htm
deleted file mode 100644
index 35d88fe3a22..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add4.htm
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - add where an index has unique:true specified </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { key: 1, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { autoIncrement: true });
-        objStore.createIndex("i1", "property", { unique: true });
-        objStore.add(record);
-
-        var rq = objStore.add(record);
-        rq.onsuccess = fail(t, "success on adding duplicate indexed record")
-
-        rq.onerror = t.step_func(function(e) {
-            assert_equals(rq.error.name, "ConstraintError");
-            assert_equals(e.target.error.name, "ConstraintError");
-            assert_equals(e.type, "error");
-
-            e.preventDefault();
-            e.stopPropagation();
-        });
-    };
-
-    // Defer done, giving a spurious rq.onsuccess a chance to run
-    open_rq.onsuccess = function(e) {
-        t.done();
-    }
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add5.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add5.any.js
new file mode 100644
index 00000000000..002e7dcf87e
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add5.any.js
@@ -0,0 +1,29 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - object store's key path is an object attribute
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { test: { obj: { key: 1 } }, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { keyPath: "test.obj.key" });
+    objStore.add(record);
+};
+
+open_rq.onsuccess = function(e) {
+    const rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .get(record.test.obj.key);
+
+    rq.onsuccess = t.step_func(function(e) {
+        assert_equals(e.target.result.property, record.property);
+
+        t.done();
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add5.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add5.htm
deleted file mode 100644
index 0cb124ff4b5..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add5.htm
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - object store's key path is an object attribute </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { test: { obj: { key: 1 } }, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { keyPath: "test.obj.key" });
-        objStore.add(record);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                   .objectStore("store")
-                   .get(record.test.obj.key);
-
-        rq.onsuccess = t.step_func(function(e) {
-            assert_equals(e.target.result.property, record.property);
-
-            t.done();
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add6.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add6.any.js
new file mode 100644
index 00000000000..bc5242156d4
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add6.any.js
@@ -0,0 +1,42 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - autoIncrement and inline keys
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+const expected_keys = [ 1, 2, 3, 4 ];
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { keyPath: "key", autoIncrement: true });
+
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+};
+
+open_rq.onsuccess = function(e) {
+    const actual_keys = [],
+        rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .openCursor();
+
+    rq.onsuccess = t.step_func(function(e) {
+        const cursor = e.target.result;
+
+        if (cursor) {
+            actual_keys.push(cursor.value.key);
+            cursor.continue();
+        }
+        else {
+            assert_array_equals(actual_keys, expected_keys);
+            t.done();
+        }
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add6.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add6.htm
deleted file mode 100644
index b6ff5a5a502..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add6.htm
+++ /dev/null
@@ -1,47 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - autoIncrement and inline keys </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" },
-      expected_keys = [ 1, 2, 3, 4 ];
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { keyPath: "key", autoIncrement: true });
-
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var actual_keys = [],
-          rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                 .objectStore("store")
-                 .openCursor();
-
-        rq.onsuccess = t.step_func(function(e) {
-            var cursor = e.target.result;
-
-            if (cursor) {
-                actual_keys.push(cursor.value.key);
-                cursor.continue();
-            }
-            else {
-                assert_array_equals(actual_keys, expected_keys);
-                t.done();
-            }
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add7.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add7.any.js
new file mode 100644
index 00000000000..eb381c4d45a
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add7.any.js
@@ -0,0 +1,42 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - autoIncrement and out-of-line keys
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+const expected_keys = [ 1, 2, 3, 4 ];
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { autoIncrement: true });
+
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+};
+
+open_rq.onsuccess = function(e) {
+    const actual_keys = [],
+        rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .openCursor();
+
+    rq.onsuccess = t.step_func(function(e) {
+        const cursor = e.target.result;
+
+        if (cursor) {
+            actual_keys.push(cursor.key);
+            cursor.continue();
+        }
+        else {
+            assert_array_equals(actual_keys, expected_keys);
+            t.done();
+        }
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add7.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add7.htm
deleted file mode 100644
index cd63917c3fa..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add7.htm
+++ /dev/null
@@ -1,47 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - autoIncrement and out-of-line keys </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" },
-      expected_keys = [ 1, 2, 3, 4 ];
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { autoIncrement: true });
-
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var actual_keys = [],
-          rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                 .objectStore("store")
-                 .openCursor();
-
-        rq.onsuccess = t.step_func(function(e) {
-            var cursor = e.target.result;
-
-            if (cursor) {
-                actual_keys.push(cursor.key);
-                cursor.continue();
-            }
-            else {
-                assert_array_equals(actual_keys, expected_keys);
-                t.done();
-            }
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add8.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add8.any.js
new file mode 100644
index 00000000000..60266835bcb
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add8.any.js
@@ -0,0 +1,42 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - object store has autoIncrement:true and the key path is an object attribute
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let db;
+const t = async_test();
+const record = { property: "data" };
+const expected_keys = [ 1, 2, 3, 4 ];
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+    db = e.target.result;
+    const objStore = db.createObjectStore("store", { keyPath: "test.obj.key", autoIncrement: true });
+
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+    objStore.add(record);
+};
+
+open_rq.onsuccess = function(e) {
+    const actual_keys = [],
+        rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                .objectStore("store")
+                .openCursor();
+
+    rq.onsuccess = t.step_func(function(e) {
+        const cursor = e.target.result;
+
+        if (cursor) {
+            actual_keys.push(cursor.value.test.obj.key);
+            cursor.continue();
+        }
+        else {
+            assert_array_equals(actual_keys, expected_keys);
+            t.done();
+        }
+    });
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add8.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add8.htm
deleted file mode 100644
index c827adf6efc..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add8.htm
+++ /dev/null
@@ -1,47 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - object store has autoIncrement:true and the key path is an object attribute </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var db,
-      t = async_test(),
-      record = { property: "data" },
-      expected_keys = [ 1, 2, 3, 4 ];
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        db = e.target.result;
-        var objStore = db.createObjectStore("store", { keyPath: "test.obj.key", autoIncrement: true });
-
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-        objStore.add(record);
-    };
-
-    open_rq.onsuccess = function(e) {
-        var actual_keys = [],
-          rq = db.transaction("store", "readonly", {durability: 'relaxed'})
-                 .objectStore("store")
-                 .openCursor();
-
-        rq.onsuccess = t.step_func(function(e) {
-            var cursor = e.target.result;
-
-            if (cursor) {
-                actual_keys.push(cursor.value.test.obj.key);
-                cursor.continue();
-            }
-            else {
-                assert_array_equals(actual_keys, expected_keys);
-                t.done();
-            }
-        });
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add9.any.js b/tests/wpt/tests/IndexedDB/idbobjectstore_add9.any.js
new file mode 100644
index 00000000000..dba9655867e
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/idbobjectstore_add9.any.js
@@ -0,0 +1,22 @@
+// META: global=window,worker
+// META: title=IDBObjectStore.add() - Attempt to add a record that does not meet the constraints of an object store's inline key requirements
+// META: script=resources/support.js
+// @author Microsoft <https://www.microsoft.com>
+
+'use_strict';
+
+let t = async_test();
+const record = { key: 1, property: "data" };
+
+const open_rq = createdb(t);
+open_rq.onupgradeneeded = function(e) {
+        let rq;
+        db = e.target.result;
+        const objStore = db.createObjectStore("store", { keyPath: "key" });
+
+    assert_throws_dom("DataError",
+        function() { rq = objStore.add(record, 1); });
+
+    assert_equals(rq, undefined);
+    t.done();
+};
diff --git a/tests/wpt/tests/IndexedDB/idbobjectstore_add9.htm b/tests/wpt/tests/IndexedDB/idbobjectstore_add9.htm
deleted file mode 100644
index 27061afd9c2..00000000000
--- a/tests/wpt/tests/IndexedDB/idbobjectstore_add9.htm
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>IDBObjectStore.add() - Attempt to add a record that does not meet the constraints of an object store's inline key requirements </title>
-<link rel="author" title="Microsoft" href="http://www.microsoft.com">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/support.js"></script>
-
-<script>
-    var t = async_test(),
-      record = { key: 1, property: "data" };
-
-    var open_rq = createdb(t);
-    open_rq.onupgradeneeded = function(e) {
-        var rq,
-          db = e.target.result,
-          objStore = db.createObjectStore("store", { keyPath: "key" });
-
-        assert_throws_dom("DataError",
-            function() { rq = objStore.add(record, 1); });
-
-        assert_equals(rq, undefined);
-        t.done();
-    };
-</script>
-
-<div id="log"></div>
diff --git a/tests/wpt/tests/IndexedDB/worker-termination-aborts-upgrade.window.js b/tests/wpt/tests/IndexedDB/worker-termination-aborts-upgrade.window.js
new file mode 100644
index 00000000000..e84ca2c2a64
--- /dev/null
+++ b/tests/wpt/tests/IndexedDB/worker-termination-aborts-upgrade.window.js
@@ -0,0 +1,71 @@
+// META: title=Worker Termination Aborts a Pending Upgrade
+// META: script=resources/support-promises.js
+
+// This test verifies that if a Worker's shutdown races an IndexedDB
+// versionchange transaction that is creating a database that the next attempt
+// to open the database results in a versionchange from version 0 and that
+// nothing was in the database.
+//
+// Care has been taken to make this test's behavior well-defined relative to the
+// spec to avoid intermittent failures.  In particular
+// `DedicatedWorkerGlobalScope.close()` is used on the worker after issuing the
+// `IDBFactory.open()` call.  This precludes any further tasks running on the
+// worker by spec, although implementations may potentially have "zones of
+// danger" in the time between the worker transitioning and when any state
+// machines on the parent thread realize what's going on.
+
+async function runAsyncFunctionInWorkerThenClose(funcToStringify) {
+  const script = `// This script was created by runAsyncFunctionInWorkerThenClose
+let testFunc = ${funcToStringify.toString()};
+setTimeout(async () => {
+  await testFunc();
+  postMessage("ran");
+  self.close();
+}, 0);
+`;
+  const scriptBlob = new Blob([script]);
+  const url = URL.createObjectURL(scriptBlob);
+  const w = new Worker(url);
+  await new Promise((resolve) => {
+    w.onmessage = (evt) => {
+      if (evt.data === "ran") {
+        resolve();
+      }
+    };
+  });
+  URL.revokeObjectURL(url);
+}
+
+promise_test(async t => {
+  await runAsyncFunctionInWorkerThenClose(async function() {
+    // Note that this code will actually run on the worker, so anything
+    // lexically captured will be coming from the worker's global scope.
+    const openReq = indexedDB.open("aborted-upgrade-db", 1);
+
+    openReq.onupgradeneeded = (event) => {
+      const db = event.target.result;
+      db.createObjectStore("should-not-be-created");
+    }
+  });
+
+  // At this point we know that the open request was issued on the worker
+  // worker thread.  An ordering concern at this point is that IDB only
+  // specifies that the the connection opening algorithm is run in parallel and
+  // we are not guaranteed that when we go "in parallel" here that our operation
+  // won't run first.  As such, it may be necessary to add some kind of
+  // arbitrary delay in the future if implementations do not effectively
+  // maintain sequential ordering of IPC requests within a process.
+  //
+  // Note that we must NOT use `createNamedDatabase` here because it will
+  // issue a blind call to `deleteDatabase`.  Because the migrate helper does
+  // not perform cleanup, we must add the cleanup deletion now, though.
+  t.add_cleanup(() => { indexedDB.deleteDatabase("aborted-upgrade-db"); });
+  let createdDB = await migrateNamedDatabase(t, "aborted-upgrade-db", 1, (db) => {
+    assert_equals(db.objectStoreNames.length, 0, "DB should have been empty");
+    // Let's make sure the database is not permanently broken / corrupted.
+    db.createObjectStore("should-be-created");
+  });
+
+  assert_equals(createdDB.objectStoreNames.length, 1, "created object store correctly");
+  assert_equals(createdDB.objectStoreNames.item(0), "should-be-created");
+});
diff --git a/tests/wpt/tests/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js b/tests/wpt/tests/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
index ef6905e574c..422a230bd16 100644
--- a/tests/wpt/tests/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
+++ b/tests/wpt/tests/WebCryptoAPI/derive_bits_keys/cfrg_curves_bits.js
@@ -6,8 +6,6 @@ function define_tests() {
   // Verify the derive functions perform checks against the all-zero value results,
   // ensuring small-order points are rejected.
   // https://www.rfc-editor.org/rfc/rfc7748#section-6.1
-  // TODO: The spec states that the check must be done on use, but there is discussion about doing it on import.
-  // https://github.com/WICG/webcrypto-secure-curves/pull/13
   Object.keys(kSmallOrderPoint).forEach(function(algorithmName) {
       kSmallOrderPoint[algorithmName].forEach(function(test) {
           promise_test(async() => {
@@ -23,8 +21,8 @@ function define_tests() {
                                                  false, [])
                   derived = await subtle.deriveBits({name: algorithmName, public: publicKey}, privateKey, 8 * sizes[algorithmName]);
               } catch (err) {
-                  assert_false(privateKey === undefined, "Private key should be valid.");
-                  assert_false(publicKey === undefined, "Public key should be valid.");
+                  assert_true(privateKey !== undefined, "Private key should be valid.");
+                  assert_true(publicKey !== undefined, "Public key should be valid.");
                   assert_equals(err.name, "OperationError", "Should throw correct error, not " + err.name + ": " + err.message + ".");
               }
               assert_equals(derived, undefined, "Operation succeeded, but should not have.");
diff --git a/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa.js b/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa.js
index d77a8808831..7817b78cff6 100644
--- a/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa.js
+++ b/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa.js
@@ -366,6 +366,28 @@ function run_test() {
       }, "Sign and verify using generated " + vector.algorithmName + " keys.");
   });
 
+  // When verifying an Ed25519 or Ed448 signature, if the public key or the first half of the signature (R) is
+  // an invalid or small-order element, return false.
+  Object.keys(kSmallOrderTestCases).forEach(function (algorithmName) {
+      var algorithm = {name: algorithmName};
+      kSmallOrderTestCases[algorithmName].forEach(function(test) {
+          // Test low-order public keys
+          promise_test(async() => {
+              let isVerified = true;
+              let publicKey;
+              try {
+                  publicKey = await subtle.importKey("raw", test.keyData,
+                                                 algorithm,
+                                                 false, ["verify"])
+                  isVerified = await subtle.verify(algorithmName, publicKey, test.signature, test.message);
+              } catch (err) {
+                  assert_equals(isVerified, test.verified, "Signature verification result.");
+                  assert_unreached("The operation shouldn't fail, but it thown this error: " + err.name + ": " + err.message + ".");
+              }
+              assert_false(isVerified, "Signature verification result.");
+          }, algorithmName + " Verification checks with small-order key of order - Test " + test.id);
+      });
+  });
 
   // A test vector has all needed fields for signing and verifying, EXCEPT that the
   // key field may be null. This function replaces that null with the Correct
diff --git a/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa_vectors.js b/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa_vectors.js
index 96ec2b01af9..ce80e0ea7e2 100644
--- a/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa_vectors.js
+++ b/tests/wpt/tests/WebCryptoAPI/sign_verify/eddsa_vectors.js
@@ -53,6 +53,145 @@ function getTestVectors() {
 
     vectors.push(vector);
   });
-
   return vectors;
 }
+
+// https://eprint.iacr.org/2020/1244.pdf#table.caption.3
+var kSmallOrderPoints = [
+    // Canonical serializations
+    [0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // #0 - Order 1
+    [0xEC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F], // #1 - Order 2
+    [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80], // #2 - Order 4
+    [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00], // #3 - Order 4
+    [0xC7, 0x17, 0x6A, 0x70, 0x3D, 0x4D, 0xD8, 0x4F, 0xBA, 0x3C, 0x0B, 0x76, 0x0D, 0x10, 0x67, 0x0F, 0x2A, 0x20, 0x53, 0xFA, 0x2C, 0x39, 0xCC, 0xC6, 0x4E, 0xC7, 0xFD, 0x77, 0x92, 0xAC, 0x03, 0x7A], // #4 - Order 8
+    [0xC7, 0x17, 0x6A, 0x70, 0x3D, 0x4D, 0xD8, 0x4F, 0xBA, 0x3C, 0x0B, 0x76, 0x0D, 0x10, 0x67, 0x0F, 0x2A, 0x20, 0x53, 0xFA, 0x2C, 0x39, 0xCC, 0xC6, 0x4E, 0xC7, 0xFD, 0x77, 0x92, 0xAC, 0x03, 0xFA], // #5 - Order 8
+    [0x26, 0xE8, 0x95, 0x8F, 0xC2, 0xB2, 0x27, 0xB0, 0x45, 0xC3, 0xF4, 0x89, 0xF2, 0xEF, 0x98, 0xF0, 0xD5, 0xDF, 0xAC, 0x05, 0xD3, 0xC6, 0x33, 0x39, 0xB1, 0x38, 0x02, 0x88, 0x6D, 0x53, 0xFC, 0x05], // #6 - Order 8
+    [0x26, 0xE8, 0x95, 0x8F, 0xC2, 0xB2, 0x27, 0xB0, 0x45, 0xC3, 0xF4, 0x89, 0xF2, 0xEF, 0x98, 0xF0, 0xD5, 0xDF, 0xAC, 0x05, 0xD3, 0xC6, 0x33, 0x39, 0xB1, 0x38, 0x02, 0x88, 0x6D, 0x53, 0xFC, 0x85], // #7 - Order 8
+
+    // Non-canonical serializatons
+    [0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80], // #8  - Order 1
+    [0xEC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF], // #9  - Order 2
+    [0xEE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F], // #10 - Order 1
+    [0xEE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF], // #11 - Order 1
+    [0xED, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF], // #12 - Order 4
+    [0xED, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F], // #13 - Order 4
+];
+
+
+var pubKeys = [
+    [0xc7, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f, 0xba, 0x3c, 0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f, 0x2a, 0x20, 0x53, 0xfa, 0x2c, 0x39, 0xcc, 0xc6, 0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0xfa], // kSmallOrderPoints #5
+    [0xf7, 0xba, 0xde, 0xc5, 0xb8, 0xab, 0xea, 0xf6, 0x99, 0x58, 0x39, 0x92, 0x21, 0x9b, 0x7b, 0x22, 0x3f, 0x1d, 0xf3, 0xfb, 0xbe, 0xa9, 0x19, 0x84, 0x4e, 0x3f, 0x7c, 0x55, 0x4a, 0x43, 0xdd, 0x43], // highest 32 bytes of case "1" signature
+    [0xcd, 0xb2, 0x67, 0xce, 0x40, 0xc5, 0xcd, 0x45, 0x30, 0x6f, 0xa5, 0xd2, 0xf2, 0x97, 0x31, 0x45, 0x93, 0x87, 0xdb, 0xf9, 0xeb, 0x93, 0x3b, 0x7b, 0xd5, 0xae, 0xd9, 0xa7, 0x65, 0xb8, 0x8d, 0x4d],
+    [0x44, 0x2a, 0xad, 0x9f, 0x08, 0x9a, 0xd9, 0xe1, 0x46, 0x47, 0xb1, 0xef, 0x90, 0x99, 0xa1, 0xff, 0x47, 0x98, 0xd7, 0x85, 0x89, 0xe6, 0x6f, 0x28, 0xec, 0xa6, 0x9c, 0x11, 0xf5, 0x82, 0xa6, 0x23],
+    [0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff], // kSmallOrderPoints #9
+    [0xEC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F], // kSmallOrderPoints #1
+]
+
+// https://eprint.iacr.org/2020/1244.pdf
+// signature = (R, S); public key A, h = SHA512(R||A||M )
+// 8(SB) = 8R + 8(hA) => (1)
+// SB = R + hA => (2)
+var kSmallOrderTestCases = {
+    "Ed25519": [
+        {
+            id: "0", // S = 0 | A's order = small | R's order = small | (1) = pass | (2) = pass
+            message : Uint8Array.from([0x8c, 0x93, 0x25, 0x5d, 0x71, 0xdc, 0xab, 0x10, 0xe8, 0xf3, 0x79, 0xc2, 0x62, 0x00, 0xf3, 0xc7, 0xbd, 0x5f, 0x09, 0xd9, 0xbc, 0x30, 0x68, 0xd3, 0xef, 0x4e, 0xde, 0xb4, 0x85, 0x30, 0x22, 0xb6]),
+            keyData : Uint8Array.from(pubKeys[0]),
+            signature : Uint8Array.from([0xc7, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f, 0xba, 0x3c, 0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f, 0x2a, 0x20, 0x53, 0xfa, 0x2c, 0x39, 0xcc, 0xc6, 0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
+            verified: false,  // small-order signature's R fail in the verification.
+        },
+        {
+            id: "1", // 0 < S < L | A's order = small | R's order = mixed | (1) = pass | (2) = pass
+            message : Uint8Array.from([0x9b, 0xd9, 0xf4, 0x4f, 0x4d, 0xcc, 0x75, 0xbd, 0x53, 0x1b, 0x56, 0xb2, 0xcd, 0x28, 0x0b, 0x0b, 0xb3, 0x8f, 0xc1, 0xcd, 0x6d, 0x12, 0x30, 0xe1, 0x48, 0x61, 0xd8, 0x61, 0xde, 0x09, 0x2e, 0x79]),
+            keyData : Uint8Array.from(pubKeys[0]),
+            signature : Uint8Array.from([0xf7, 0xba, 0xde, 0xc5, 0xb8, 0xab, 0xea, 0xf6, 0x99, 0x58, 0x39, 0x92, 0x21, 0x9b, 0x7b, 0x22, 0x3f, 0x1d, 0xf3, 0xfb, 0xbe, 0xa9, 0x19, 0x84, 0x4e, 0x3f, 0x7c, 0x55, 0x4a, 0x43, 0xdd, 0x43, 0xa5, 0xbb, 0x70, 0x47, 0x86, 0xbe, 0x79, 0xfc, 0x47, 0x6f, 0x91, 0xd3, 0xf3, 0xf8, 0x9b, 0x03, 0x98, 0x4d, 0x80, 0x68, 0xdc, 0xf1, 0xbb, 0x7d, 0xfc, 0x66, 0x37, 0xb4, 0x54, 0x50, 0xac, 0x04]),
+            verified: false, // small-order key's data fail in the verification.
+        },
+        {
+            id: "2", // 0 < S < L | A's order = mixed | R's order = small | (1) = pass | (2) = pass
+            message : Uint8Array.from([0xae, 0xbf, 0x3f, 0x26, 0x01, 0xa0, 0xc8, 0xc5, 0xd3, 0x9c, 0xc7, 0xd8, 0x91, 0x16, 0x42, 0xf7, 0x40, 0xb7, 0x81, 0x68, 0x21, 0x8d, 0xa8, 0x47, 0x17, 0x72, 0xb3, 0x5f, 0x9d, 0x35, 0xb9, 0xab]),
+            keyData : Uint8Array.from(pubKeys[1]),
+            signature : Uint8Array.from([0xc7, 0x17, 0x6a, 0x70, 0x3d, 0x4d, 0xd8, 0x4f, 0xba, 0x3c, 0x0b, 0x76, 0x0d, 0x10, 0x67, 0x0f, 0x2a, 0x20, 0x53, 0xfa, 0x2c, 0x39, 0xcc, 0xc6, 0x4e, 0xc7, 0xfd, 0x77, 0x92, 0xac, 0x03, 0xfa, 0x8c, 0x4b, 0xd4, 0x5a, 0xec, 0xac, 0xa5, 0xb2, 0x4f, 0xb9, 0x7b, 0xc1, 0x0a, 0xc2, 0x7a, 0xc8, 0x75, 0x1a, 0x7d, 0xfe, 0x1b, 0xaf, 0xf8, 0xb9, 0x53, 0xec, 0x9f, 0x58, 0x33, 0xca, 0x26, 0x0e]),
+            verified: false,  // small-order signature's R fail in the verification.
+        },
+        {
+            id: "3", // 0 < S < L | A's order = mixed | R's order = mixed | (1) = pass | (2) = pass
+            message : Uint8Array.from([0x9b, 0xd9, 0xf4, 0x4f, 0x4d, 0xcc, 0x75, 0xbd, 0x53, 0x1b, 0x56, 0xb2, 0xcd, 0x28, 0x0b, 0x0b, 0xb3, 0x8f, 0xc1, 0xcd, 0x6d, 0x12, 0x30, 0xe1, 0x48, 0x61, 0xd8, 0x61, 0xde, 0x09, 0x2e, 0x79]),
+            keyData : Uint8Array.from(pubKeys[2]),
+            signature : Uint8Array.from([0x90, 0x46, 0xa6, 0x47, 0x50, 0x44, 0x49, 0x38, 0xde, 0x19, 0xf2, 0x27, 0xbb, 0x80, 0x48, 0x5e, 0x92, 0xb8, 0x3f, 0xdb, 0x4b, 0x65, 0x06, 0xc1, 0x60, 0x48, 0x4c, 0x01, 0x6c, 0xc1, 0x85, 0x2f, 0x87, 0x90, 0x9e, 0x14, 0x42, 0x8a, 0x7a, 0x1d, 0x62, 0xe9, 0xf2, 0x2f, 0x3d, 0x3a, 0xd7, 0x80, 0x2d, 0xb0, 0x2e, 0xb2, 0xe6, 0x88, 0xb6, 0xc5, 0x2f, 0xcd, 0x66, 0x48, 0xa9, 0x8b, 0xd0, 0x09]),
+            verified: true, // mixed-order points are not checked.
+        },
+        {
+            id: "4", // 0 < S < L | A's order = mixed | R's order = mixed | (1) = pass | (2) = fail
+            message : Uint8Array.from([0xe4, 0x7d, 0x62, 0xc6, 0x3f, 0x83, 0x0d, 0xc7, 0xa6, 0x85, 0x1a, 0x0b, 0x1f, 0x33, 0xae, 0x4b, 0xb2, 0xf5, 0x07, 0xfb, 0x6c, 0xff, 0xec, 0x40, 0x11, 0xea, 0xcc, 0xd5, 0x5b, 0x53, 0xf5, 0x6c]),
+            keyData : Uint8Array.from(pubKeys[2]),
+            signature : Uint8Array.from([0x16, 0x0a, 0x1c, 0xb0, 0xdc, 0x9c, 0x02, 0x58, 0xcd, 0x0a, 0x7d, 0x23, 0xe9, 0x4d, 0x8f, 0xa8, 0x78, 0xbc, 0xb1, 0x92, 0x5f, 0x2c, 0x64, 0x24, 0x6b, 0x2d, 0xee, 0x17, 0x96, 0xbe, 0xd5, 0x12, 0x5e, 0xc6, 0xbc, 0x98, 0x2a, 0x26, 0x9b, 0x72, 0x3e, 0x06, 0x68, 0xe5, 0x40, 0x91, 0x1a, 0x9a, 0x6a, 0x58, 0x92, 0x1d, 0x69, 0x25, 0xe4, 0x34, 0xab, 0x10, 0xaa, 0x79, 0x40, 0x55, 0x1a, 0x09]),
+            verified: false, // expect a cofactorless verification algorithm.
+        },
+        {
+            id: "5", // 0 < S < L | A's order = mixed | R's order = L | (1) = pass | (2) = fail
+            message : Uint8Array.from([0xe4, 0x7d, 0x62, 0xc6, 0x3f, 0x83, 0x0d, 0xc7, 0xa6, 0x85, 0x1a, 0x0b, 0x1f, 0x33, 0xae, 0x4b, 0xb2, 0xf5, 0x07, 0xfb, 0x6c, 0xff, 0xec, 0x40, 0x11, 0xea, 0xcc, 0xd5, 0x5b, 0x53, 0xf5, 0x6c]),
+            keyData : Uint8Array.from(pubKeys[2]),
+            signature : Uint8Array.from([0x21, 0x12, 0x2a, 0x84, 0xe0, 0xb5, 0xfc, 0xa4, 0x05, 0x2f, 0x5b, 0x12, 0x35, 0xc8, 0x0a, 0x53, 0x78, 0x78, 0xb3, 0x8f, 0x31, 0x42, 0x35, 0x6b, 0x2c, 0x23, 0x84, 0xeb, 0xad, 0x46, 0x68, 0xb7, 0xe4, 0x0b, 0xc8, 0x36, 0xda, 0xc0, 0xf7, 0x10, 0x76, 0xf9, 0xab, 0xe3, 0xa5, 0x3f, 0x9c, 0x03, 0xc1, 0xce, 0xee, 0xdd, 0xb6, 0x58, 0xd0, 0x03, 0x04, 0x94, 0xac, 0xe5, 0x86, 0x68, 0x74, 0x05]),
+            verified: false, // expect a cofactorless verification algorithm.
+        },
+        {
+            id: "6", // S > L | A's order = L | R's order = L | (1) = pass | (2) = pass
+            message : Uint8Array.from([0x85, 0xe2, 0x41, 0xa0, 0x7d, 0x14, 0x8b, 0x41, 0xe4, 0x7d, 0x62, 0xc6, 0x3f, 0x83, 0x0d, 0xc7, 0xa6, 0x85, 0x1a, 0x0b, 0x1f, 0x33, 0xae, 0x4b, 0xb2, 0xf5, 0x07, 0xfb, 0x6c, 0xff, 0xec, 0x40]),
+            keyData : Uint8Array.from(pubKeys[3]),
+            signature : Uint8Array.from([0xe9, 0x6f, 0x66, 0xbe, 0x97, 0x6d, 0x82, 0xe6, 0x01, 0x50, 0xba, 0xec, 0xff, 0x99, 0x06, 0x68, 0x4a, 0xeb, 0xb1, 0xef, 0x18, 0x1f, 0x67, 0xa7, 0x18, 0x9a, 0xc7, 0x8e, 0xa2, 0x3b, 0x6c, 0x0e, 0x54, 0x7f, 0x76, 0x90, 0xa0, 0xe2, 0xdd, 0xcd, 0x04, 0xd8, 0x7d, 0xbc, 0x34, 0x90, 0xdc, 0x19, 0xb3, 0xb3, 0x05, 0x2f, 0x7f, 0xf0, 0x53, 0x8c, 0xb6, 0x8a, 0xfb, 0x36, 0x9b, 0xa3, 0xa5, 0x14]),
+            verified: false, // S out of bounds
+        },
+        {
+            id: "7", // S >> L | A's order = L | R's order = L | (1) = pass | (2) = pass
+            message : Uint8Array.from([0x85, 0xe2, 0x41, 0xa0, 0x7d, 0x14, 0x8b, 0x41, 0xe4, 0x7d, 0x62, 0xc6, 0x3f, 0x83, 0x0d, 0xc7, 0xa6, 0x85, 0x1a, 0x0b, 0x1f, 0x33, 0xae, 0x4b, 0xb2, 0xf5, 0x07, 0xfb, 0x6c, 0xff, 0xec, 0x40]),
+            keyData : Uint8Array.from(pubKeys[3]),
+            signature : Uint8Array.from([0x8c, 0xe5, 0xb9, 0x6c, 0x8f, 0x26, 0xd0, 0xab, 0x6c, 0x47, 0x95, 0x8c, 0x9e, 0x68, 0xb9, 0x37, 0x10, 0x4c, 0xd3, 0x6e, 0x13, 0xc3, 0x35, 0x66, 0xac, 0xd2, 0xfe, 0x8d, 0x38, 0xaa, 0x19, 0x42, 0x7e, 0x71, 0xf9, 0x8a, 0x47, 0x34, 0xe7, 0x4f, 0x2f, 0x13, 0xf0, 0x6f, 0x97, 0xc2, 0x0d, 0x58, 0xcc, 0x3f, 0x54, 0xb8, 0xbd, 0x0d, 0x27, 0x2f, 0x42, 0xb6, 0x95, 0xdd, 0x7e, 0x89, 0xa8, 0xc2, 0x02]),
+            verified: false, // S out of bounds
+        },
+        {
+            id: "8", // 0 < S < L | A's order = mixed | R's order = small (non-canonical) | (1) = ? | (2) = ? Implementations that reduce A before hashing will accept #8 and accept #9, and viceversa
+            message : Uint8Array.from([0x9b, 0xed, 0xc2, 0x67, 0x42, 0x37, 0x25, 0xd4, 0x73, 0x88, 0x86, 0x31, 0xeb, 0xf4, 0x59, 0x88, 0xba, 0xd3, 0xdb, 0x83, 0x85, 0x1e, 0xe8, 0x5c, 0x85, 0xe2, 0x41, 0xa0, 0x7d, 0x14, 0x8b, 0x41]),
+            keyData : Uint8Array.from(pubKeys[1]),
+            signature : Uint8Array.from([0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x03, 0xbe, 0x96, 0x78, 0xac, 0x10, 0x2e, 0xdc, 0xd9, 0x2b, 0x02, 0x10, 0xbb, 0x34, 0xd7, 0x42, 0x8d, 0x12, 0xff, 0xc5, 0xdf, 0x5f, 0x37, 0xe3, 0x59, 0x94, 0x12, 0x66, 0xa4, 0xe3, 0x5f, 0x0f]),
+            verified: false, // non-canonical point should fail in the verificaton (RFC8032)
+        },
+        {
+            id: "9", // 0 < S < L | A's order = mixed | R's order = small (non-canonical) | (1) = ? | (2) = ?
+            message : Uint8Array.from([0x9b, 0xed, 0xc2, 0x67, 0x42, 0x37, 0x25, 0xd4, 0x73, 0x88, 0x86, 0x31, 0xeb, 0xf4, 0x59, 0x88, 0xba, 0xd3, 0xdb, 0x83, 0x85, 0x1e, 0xe8, 0x5c, 0x85, 0xe2, 0x41, 0xa0, 0x7d, 0x14, 0x8b, 0x41]),
+            keyData : Uint8Array.from(pubKeys[1]),
+            signature : Uint8Array.from([0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xca, 0x8c, 0x5b, 0x64, 0xcd, 0x20, 0x89, 0x82, 0xaa, 0x38, 0xd4, 0x93, 0x66, 0x21, 0xa4, 0x77, 0x5a, 0xa2, 0x33, 0xaa, 0x05, 0x05, 0x71, 0x1d, 0x8f, 0xdc, 0xfd, 0xaa, 0x94, 0x3d, 0x49, 0x08]),
+            verified: false, // non-canonical point should fail in the verificaton (RFC8032)
+        },
+        {
+            id: "10", // 0 < S < L | A's order = small (non-canonical) | R's order = mixed | (1) = ? | (2) = ? Implementations that reduce A before hashing will accept #10 and accept #11, and viceversa
+            message : Uint8Array.from([0xe9, 0x6b, 0x70, 0x21, 0xeb, 0x39, 0xc1, 0xa1, 0x63, 0xb6, 0xda, 0x4e, 0x30, 0x93, 0xdc, 0xd3, 0xf2, 0x13, 0x87, 0xda, 0x4c, 0xc4, 0x57, 0x2b, 0xe5, 0x88, 0xfa, 0xfa, 0xe2, 0x3c, 0x15, 0x5b]),
+            keyData : Uint8Array.from(pubKeys[4]),
+            signature : Uint8Array.from([0xa9, 0xd5, 0x52, 0x60, 0xf7, 0x65, 0x26, 0x1e, 0xb9, 0xb8, 0x4e, 0x10, 0x6f, 0x66, 0x5e, 0x00, 0xb8, 0x67, 0x28, 0x7a, 0x76, 0x19, 0x90, 0xd7, 0x13, 0x59, 0x63, 0xee, 0x0a, 0x7d, 0x59, 0xdc, 0xa5, 0xbb, 0x70, 0x47, 0x86, 0xbe, 0x79, 0xfc, 0x47, 0x6f, 0x91, 0xd3, 0xf3, 0xf8, 0x9b, 0x03, 0x98, 0x4d, 0x80, 0x68, 0xdc, 0xf1, 0xbb, 0x7d, 0xfc, 0x66, 0x37, 0xb4, 0x54, 0x50, 0xac, 0x04]),
+            verified: false, // non-canonical point should fail in the verificaton (RFC8032)
+        },
+        {
+            id: "11", // 0 < S < L | A's order = small (non-canonical) | R's order = mixed | (1) = ? | (2) = ? Implementations that reduce A before hashing will accept #10 and accept #11, and viceversa
+            message : Uint8Array.from([0x39, 0xa5, 0x91, 0xf5, 0x32, 0x1b, 0xbe, 0x07, 0xfd, 0x5a, 0x23, 0xdc, 0x2f, 0x39, 0xd0, 0x25, 0xd7, 0x45, 0x26, 0x61, 0x57, 0x46, 0x72, 0x7c, 0xee, 0xfd, 0x6e, 0x82, 0xae, 0x65, 0xc0, 0x6f]),
+            keyData : Uint8Array.from(pubKeys[4]),
+            signature : Uint8Array.from([0xa9, 0xd5, 0x52, 0x60, 0xf7, 0x65, 0x26, 0x1e, 0xb9, 0xb8, 0x4e, 0x10, 0x6f, 0x66, 0x5e, 0x00, 0xb8, 0x67, 0x28, 0x7a, 0x76, 0x19, 0x90, 0xd7, 0x13, 0x59, 0x63, 0xee, 0x0a, 0x7d, 0x59, 0xdc, 0xa5, 0xbb, 0x70, 0x47, 0x86, 0xbe, 0x79, 0xfc, 0x47, 0x6f, 0x91, 0xd3, 0xf3, 0xf8, 0x9b, 0x03, 0x98, 0x4d, 0x80, 0x68, 0xdc, 0xf1, 0xbb, 0x7d, 0xfc, 0x66, 0x37, 0xb4, 0x54, 0x50, 0xac, 0x04]),
+            verified: false, // non-canonical point should fail in the verificaton (RFC8032)
+        },
+        // https://eprint.iacr.org/2020/1244.pdf#section.A.2
+        // cases breaking non-repudiation
+        {
+            id: "12", // 0 < S < L | A's order = small | R's order = mixed | (1) = ? | (2) = ?
+            message : Uint8Array.from([0x53, 0x65, 0x6e, 0x64, 0x20, 0x31, 0x30, 0x30, 0x20, 0x55, 0x53, 0x44, 0x20, 0x74, 0x6f, 0x20, 0x41, 0x6c, 0x69, 0x63, 0x65]),
+            keyData : Uint8Array.from(pubKeys[5]),
+            signature : Uint8Array.from([0xa9, 0xd5, 0x52, 0x60, 0xf7, 0x65, 0x26, 0x1e, 0xb9, 0xb8, 0x4e, 0x10, 0x6f, 0x66, 0x5e, 0x00, 0xb8, 0x67, 0x28, 0x7a, 0x76, 0x19, 0x90, 0xd7, 0x13, 0x59, 0x63, 0xee, 0x0a, 0x7d, 0x59, 0xdc, 0xa5, 0xbb, 0x70, 0x47, 0x86, 0xbe, 0x79, 0xfc, 0x47, 0x6f, 0x91, 0xd3, 0xf3, 0xf8, 0x9b, 0x03, 0x98, 0x4d, 0x80, 0x68, 0xdc, 0xf1, 0xbb, 0x7d, 0xfc, 0x66, 0x37, 0xb4, 0x54, 0x50, 0xac, 0x04]),
+            verified: false,
+        },
+        {
+            id: "13", // 0 < S < L | A's order = small | R's order = mixed | (1) = ? | (2) = ?
+            message : Uint8Array.from([0x53, 0x65, 0x6e, 0x64, 0x20, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x20, 0x55, 0x53, 0x44, 0x20, 0x74, 0x6f, 0x20, 0x41, 0x6c, 0x69, 0x63, 0x65]),
+            keyData : Uint8Array.from(pubKeys[5]),
+            signature : Uint8Array.from([0xa9, 0xd5, 0x52, 0x60, 0xf7, 0x65, 0x26, 0x1e, 0xb9, 0xb8, 0x4e, 0x10, 0x6f, 0x66, 0x5e, 0x00, 0xb8, 0x67, 0x28, 0x7a, 0x76, 0x19, 0x90, 0xd7, 0x13, 0x59, 0x63, 0xee, 0x0a, 0x7d, 0x59, 0xdc, 0xa5, 0xbb, 0x70, 0x47, 0x86, 0xbe, 0x79, 0xfc, 0x47, 0x6f, 0x91, 0xd3, 0xf3, 0xf8, 0x9b, 0x03, 0x98, 0x4d, 0x80, 0x68, 0xdc, 0xf1, 0xbb, 0x7d, 0xfc, 0x66, 0x37, 0xb4, 0x54, 0x50, 0xac, 0x04]),
+            verified: false,
+        }
+    ]
+};
diff --git a/tests/wpt/tests/clipboard-apis/async-svg-script-removal.https.html b/tests/wpt/tests/clipboard-apis/async-svg-script-removal.https.html
deleted file mode 100644
index 292d100b2fc..00000000000
--- a/tests/wpt/tests/clipboard-apis/async-svg-script-removal.https.html
+++ /dev/null
@@ -1,61 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>
-  Async Clipboard write ([image/svg+xml ClipboardItem]) -> readSvg (and remove scripts) tests
-</title>
-<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
-<body>Body needed for test_driver.click()</body>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/testdriver.js"></script>
-<script src="/resources/testdriver-vendor.js"></script>
-<script src="resources/user-activation.js"></script>
-<script>
-'use strict';
-// This function removes extra spaces between tags in svg. For example, the
-// following svg: "<svg> <g> </g>     </svg>" would turn into this
-//           svg: "<svg> <g> </g> </svg>"
-// We remove the extra spaces because in svg they are considered equivalent,
-// but when we are comparing for equality the spaces make a difference.
-function reformatSvg(svg) {
-  const parser = new DOMParser();
-  const svgString =
-    parser.parseFromString(svg, 'text/html').documentElement.innerHTML;
-  const reformattedString = svgString.replace(/\>\s*\</g, '> <');
-  return reformattedString;
-}
-
-// The string must be concatenated in this way because the html parser
-// will recognize a script tag even in quotes as a real script tag. By
-// splitting it up in this way we avoid that error.
-const svg_with_script =
-  `<svg> <script>const a = 5;</scr' + 'ipt>
-   <a href="javascript:alert(2)"> test </a> </svg>`;
-const svg_without_script =
-  `<svg> </svg>`;
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-  const blobInput = new Blob([svg_with_script], {type: 'image/svg+xml'});
-  const clipboardItem = new ClipboardItem({'image/svg+xml': blobInput});
-  await waitForUserActivation();
-  await navigator.clipboard.write([clipboardItem]);
-  await waitForUserActivation();
-  const clipboardItems =
-      await navigator.clipboard.read({type: 'image/svg+xml'});
-
-  const svg = clipboardItems[0];
-  assert_equals(svg.types.length, 1);
-  assert_equals(svg.types[0], 'image/svg+xml');
-
-  const blobOutput = await svg.getType('image/svg+xml');
-  assert_equals(blobOutput.type, 'image/svg+xml');
-
-  const blobText = await (new Response(blobOutput)).text();
-
-  const outputSvg = reformatSvg(blobText);
-  const inputSvg = reformatSvg(svg_without_script);
-  assert_equals(outputSvg, inputSvg);
-}, 'Verify write and read clipboard with scripts removed given image/svg+xml: '
-    + svg_with_script);
-</script>
diff --git a/tests/wpt/tests/clipboard-apis/async-write-svg-read-svg.https.html b/tests/wpt/tests/clipboard-apis/async-write-svg-read-svg.https.html
deleted file mode 100644
index 42f6c547b29..00000000000
--- a/tests/wpt/tests/clipboard-apis/async-write-svg-read-svg.https.html
+++ /dev/null
@@ -1,60 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>
-  Async Clipboard write ([image/svg+xml ClipboardItem]) -> read and write svg tests
-</title>
-<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
-<body>Body needed for test_driver.click()</body>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/testdriver.js"></script>
-<script src="/resources/testdriver-vendor.js"></script>
-<script src="resources/user-activation.js"></script>
-<script>
-'use strict';
-// This function removes extra spaces between tags in svg. For example, the
-// following html: "<svg> <g> </g>   </svg>" would turn into this
-//           html: "<svg> <g> </g>   </svg>"
-// We remove the extra spaces because in svg they are considered equivalent,
-// but when we are comparing for equality the spaces make a difference.
-function reformatSvg(svg) {
-  const parser = new DOMParser();
-  const svgString =
-        parser.parseFromString(svg, 'text/html').documentElement.innerHTML;
-  const reformattedString = svgString.replace(/\>\s*\</g, '> <');
-  return reformattedString;
-}
-
-async function readWriteTest(textInput) {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-  const blobInput = new Blob([textInput], {type: 'image/svg+xml'});
-  const clipboardItem = new ClipboardItem({'image/svg+xml': blobInput});
-  await waitForUserActivation();
-  await navigator.clipboard.write([clipboardItem]);
-  await waitForUserActivation();
-  const clipboardItems =
-      await navigator.clipboard.read({type: 'image/svg+xml'});
-
-  const svg = clipboardItems[0];
-  assert_equals(svg.types.length, 1);
-  assert_equals(svg.types[0], 'image/svg+xml');
-
-  const blobOutput = await svg.getType('image/svg+xml');
-  assert_equals(blobOutput.type, 'image/svg+xml');
-
-  const blobText = await (new Response(blobOutput)).text();
-  const outputSvg = reformatSvg(blobText);
-  const inputSvg = reformatSvg(textInput);
-  assert_equals(outputSvg, inputSvg);
-}
-const testCases = ['<svg></svg>',
-                   '<svg> <circle cx="50" cy="50" r="40" /> </svg>'];
-
-promise_test(async t => {
-  for (const testCase of testCases) {
-    await readWriteTest(testCase);
-  }
-}, 'Verify read and write of some image/svg+xml content');
-
-</script>
diff --git a/tests/wpt/tests/content-security-policy/securitypolicyviolation/constructor-required-fields.html b/tests/wpt/tests/content-security-policy/securitypolicyviolation/constructor-required-fields.html
index 1a090d8e2c4..1f30e38b0c2 100644
--- a/tests/wpt/tests/content-security-policy/securitypolicyviolation/constructor-required-fields.html
+++ b/tests/wpt/tests/content-security-policy/securitypolicyviolation/constructor-required-fields.html
@@ -25,118 +25,111 @@
       }), undefined);
     }, "SecurityPolicyViolationEvent constructor works with an init dict");
 
-    // missing required members
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          // documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          violatedDirective: "default-src",
-          effectiveDirective: "default-src",
-          originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          disposition: "enforce",
-          statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires documentURI");
-
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          // violatedDirective: "default-src",
-          effectiveDirective: "default-src",
-          originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          disposition: "enforce",
-          statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires violatedDirective");
-
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          violatedDirective: "default-src",
-          // effectiveDirective: "default-src",
-          originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          disposition: "enforce",
-          statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires effectiveDirective");
-
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          violatedDirective: "default-src",
-          effectiveDirective: "default-src",
-          // originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          disposition: "enforce",
-          statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires originalPolicy");
-
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          violatedDirective: "default-src",
-          effectiveDirective: "default-src",
-          originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          // disposition: "enforce",
-          statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires disposition");
-
-    test(function() {
-      assert_throws_js(TypeError,
-        function() { new SecurityPolicyViolationEvent("securitypolicyviolation", {
-          documentURI: "http://example.com",
-          referrer: "http://example.com",
-          blockedURI: "http://example.com",
-          violatedDirective: "default-src",
-          effectiveDirective: "default-src",
-          originalPolicy: "default-src 'none'",
-          sourceFile: "example.js",
-          sample: "<script>alert('1');</scr" + "ipt>",
-          disposition: "enforce",
-          // statusCode: 200,
-          lineNumber: 1,
-          columnNumber: 1,
-      })});
-    }, "SecurityPolicyViolationEvent constructor requires statusCode");
-
     // missing optional members
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        // documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        violatedDirective: "default-src",
+        effectiveDirective: "default-src",
+        originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        disposition: "enforce",
+        statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).documentURI, "");
+    }, "SecurityPolicyViolationEvent constructor does not require documentURI");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        // violatedDirective: "default-src",
+        effectiveDirective: "default-src",
+        originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        disposition: "enforce",
+        statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).violatedDirective, "");
+    }, "SecurityPolicyViolationEvent constructor does not require violatedDirective");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        violatedDirective: "default-src",
+        // effectiveDirective: "default-src",
+        originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        disposition: "enforce",
+        statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).effectiveDirective, "");
+    }, "SecurityPolicyViolationEvent constructor does not require effectiveDirective");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        violatedDirective: "default-src",
+        effectiveDirective: "default-src",
+        // originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        disposition: "enforce",
+        statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).originalPolicy, "");
+    }, "SecurityPolicyViolationEvent constructor does not require originalPolicy");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        violatedDirective: "default-src",
+        effectiveDirective: "default-src",
+        originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        // disposition: "enforce",
+        statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).disposition, "enforce");
+    }, "SecurityPolicyViolationEvent constructor does not require disposition");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+        documentURI: "http://example.com",
+        referrer: "http://example.com",
+        blockedURI: "http://example.com",
+        violatedDirective: "default-src",
+        effectiveDirective: "default-src",
+        originalPolicy: "default-src 'none'",
+        sourceFile: "example.js",
+        sample: "<script>alert('1');</scr" + "ipt>",
+        disposition: "enforce",
+        // statusCode: 200,
+        lineNumber: 1,
+        columnNumber: 1,
+      }).statusCode, 0);
+    }, "SecurityPolicyViolationEvent constructor does not require statusCode");
+
+    test(function() {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         // referrer: "http://example.com",
         blockedURI: "http://example.com",
@@ -149,11 +142,11 @@
         statusCode: 200,
         lineNumber: 1,
         columnNumber: 1,
-      }), undefined);
+      }).referrer, "");
     }, "SecurityPolicyViolationEvent constructor does not require referrer");
 
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         referrer: "http://example.com",
         // blockedURI: "http://example.com",
@@ -166,11 +159,11 @@
         statusCode: 200,
         lineNumber: 1,
         columnNumber: 1,
-      }), undefined);
+      }).blockedURI, "");
     }, "SecurityPolicyViolationEvent constructor does not require blockedURI");
 
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         referrer: "http://example.com",
         blockedURI: "http://example.com",
@@ -183,11 +176,11 @@
         statusCode: 200,
         lineNumber: 1,
         columnNumber: 1,
-      }), undefined);
+      }).sourceFile, "");
     }, "SecurityPolicyViolationEvent constructor does not require sourceFile");
 
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         referrer: "http://example.com",
         blockedURI: "http://example.com",
@@ -200,11 +193,11 @@
         statusCode: 200,
         lineNumber: 1,
         columnNumber: 1,
-      }), undefined);
+      }).sample, "");
     }, "SecurityPolicyViolationEvent constructor does not require sample");
 
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         referrer: "http://example.com",
         blockedURI: "http://example.com",
@@ -217,11 +210,11 @@
         statusCode: 200,
         // lineNumber: 1,
         columnNumber: 1,
-      }), undefined);
+      }).lineNumber, 0);
     }, "SecurityPolicyViolationEvent constructor does not require lineNumber");
 
     test(function() {
-      assert_not_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
+      assert_equals(new SecurityPolicyViolationEvent("securitypolicyviolation", {
         documentURI: "http://example.com",
         referrer: "http://example.com",
         blockedURI: "http://example.com",
@@ -234,6 +227,6 @@
         statusCode: 200,
         lineNumber: 1,
         // columnNumber: 1,
-      }), undefined);
+      }).columnNumber, 0);
     }, "SecurityPolicyViolationEvent constructor does not require columnNumber");
 </script>
diff --git a/tests/wpt/tests/cookies/third-party-cookies/resources/test-helpers.js b/tests/wpt/tests/cookies/third-party-cookies/resources/test-helpers.js
index 2ae2c46a371..c76ac716161 100644
--- a/tests/wpt/tests/cookies/third-party-cookies/resources/test-helpers.js
+++ b/tests/wpt/tests/cookies/third-party-cookies/resources/test-helpers.js
@@ -1,10 +1,10 @@
 function testHttpCookies({desc, origin, cookieNames, expectsCookie}) {
   promise_test(async () => {
-    await assertOriginCanAccessCookies({origin, cookieNames, expectsCookie});
+    await assertHttpOriginCanAccessCookies({ origin, cookieNames, expectsCookie });
   }, getCookieTestName(expectsCookie, desc, "HTTP"));
 }
 
-async function assertOriginCanAccessCookies({
+async function assertHttpOriginCanAccessCookies({
   origin,
   cookieNames,
   expectsCookie,
@@ -18,6 +18,29 @@ async function assertOriginCanAccessCookies({
   }
 }
 
+async function assertThirdPartyHttpCookies({ desc, origin, cookieNames, expectsCookie }) {
+  // Test that these cookies are not available on cross-site subresource requests to the
+  // origin that set them.
+  testHttpCookies({
+    desc,
+    origin,
+    cookieNames,
+    expectsCookie,
+  });
+
+  promise_test(async () => {
+    const thirdPartyHttpCookie = "3P_http"
+    await credFetch(
+      `${origin}/cookies/resources/set.py?${thirdPartyHttpCookie}=foobar;` +
+      "Secure;Path=/;SameSite=None");
+    await assertHttpOriginCanAccessCookies({
+      origin,
+      cookieNames: [thirdPartyHttpCookie],
+      expectsCookie,
+    });
+  }, desc + ": Cross site window setting HTTP cookies");
+}
+
 function testDomCookies({desc, cookieNames, expectsCookie}) {
   test(() => {
     assertDomCanAccessCookie(cookieNames, expectsCookie);
diff --git a/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-window.html b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-embedder.html
similarity index 71%
rename from tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-window.html
rename to tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-embedder.html
index 99418a67491..ec25902a915 100644
--- a/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-window.html
+++ b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-embedder.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <meta charset="utf-8"/>
 <meta name="timeout" content="long">
-<title>Cross-site window</title>
+<title>Window embedding a cross-site embed</title>
 <script src="/resources/testharness.js"></script>
 <script src="/common/get-host-info.sub.js"></script>
 <script src="/cookies/resources/cookie-helper.sub.js"></script>
@@ -25,27 +25,14 @@ if (window.cookieStore) {
   cookieNames.push("1P_cs");
 }
 
-// Test theses cookies are not available on cross-site subresource requests
-// to the origin that set them.
-testHttpCookies({
+// Third-party cookies are blocked by default.
+assertThirdPartyHttpCookies({
   desc: "3P fetch",
   origin,
   cookieNames,
   expectsCookie: false,
 });
 
-promise_test(async () => {
-  const thirdPartyHttpCookie = "3P_http"
-  await credFetch(
-    `${origin}/cookies/resources/set.py?${thirdPartyHttpCookie}=foobar;` +
-    "Secure;Path=/;SameSite=None");
-  await assertOriginCanAccessCookies({
-    origin,
-    cookieNames: ["3P_http"],
-    expectsCookie: false,
-  });
-}, "Cross site window setting HTTP cookies");
-
 // Create a cross-site <iframe> which embeds the cookies' origin into this
 // page.
 const iframe = document.createElement("iframe");
diff --git a/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html
new file mode 100644
index 00000000000..88f43b559c8
--- /dev/null
+++ b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<title>Window that opens a popup in a cross-site context</title>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>
+
+<body>
+  <script>
+
+    let origin;
+
+    // Test that parent window passed its origin in the URL parameters correctly.
+    test(() => {
+      assert_true(window.location.search.startsWith("?origin="));
+      origin = decodeURIComponent(window.location.search.slice(
+        window.location.search.indexOf("?origin=") + 8));
+    }, "Cross-site window opened correctly");
+
+    // Cookies set by the parent window in a 1P context.
+    const cookieNames = ["1P_http", "1P_dom"];
+    if (window.cookieStore) {
+      cookieNames.push("1P_cs");
+    }
+
+    // Verify whether third-party cookies are blocked by default.
+    promise_test(async () => {
+      const thirdPartyHttpCookie = "3P_http"
+      await credFetch(
+        `${origin}/cookies/resources/set.py?${thirdPartyHttpCookie}=foobar;` +
+        "Secure;Path=/;SameSite=None");
+      await assertOriginCanAccessCookies({
+        origin,
+        cookieNames: [thirdPartyHttpCookie],
+        expectsCookie: false,
+      });
+    }, "3P fetch: Cross site window setting HTTP cookies");
+
+    // Open the cookies' origin in a popup to activate the heuristic.
+    const popupUrl = new URL(
+      "/cookies/third-party-cookies/resources/" +
+      "third-party-cookies-cross-site-popup.html",
+      origin);
+    const popup = window.open(popupUrl);
+
+    fetch_tests_from_window(popup);
+
+  </script>
+</body>
diff --git a/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-verify.html b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-verify.html
new file mode 100644
index 00000000000..8d4819ad829
--- /dev/null
+++ b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-verify.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<title>Verifies heuristics enabled by popup</title>
+<script src="/resources/testharness.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>
+
+<body>
+  <script>
+
+    // Test that parent window passed its parameters in the URL correctly.
+    test(() => {
+      assert_true(window.location.search.includes("?desc="));
+      assert_true(window.location.search.includes("&origin="));
+
+      desc = decodeURIComponent(window.location.search.slice(
+        window.location.search.indexOf("?desc=") + 6,
+        window.location.search.indexOf("&origin=")));
+      origin = decodeURIComponent(window.location.search.slice(
+        window.location.search.indexOf("&origin=") + 8));
+    }, "Cross-site verify opened correctly");
+
+    // Cookies set by the parent window in a 1P context.
+    const cookieNames = ["1P_http", "1P_dom"];
+    if (window.cookieStore) {
+      cookieNames.push("1P_cs");
+    }
+
+    // Third-party cookies are allowed after the popup heuristic grant.
+    assertThirdPartyHttpCookies({
+      desc,
+      origin,
+      cookieNames,
+      expectsCookie: true,
+    });
+
+  </script>
+</body>
diff --git a/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup.html b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup.html
new file mode 100644
index 00000000000..6f802007f8d
--- /dev/null
+++ b/tests/wpt/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<title>Cross-site popup</title>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>
+
+<body>
+  <button id="button" onclick="userInteractionCallback()">Click for user interaction</button>
+
+  <script>
+    const origin = window.origin;
+    const crossSiteOrigin = get_host_info().HTTPS_NOTSAMESITE_ORIGIN + self.location.pathname;
+
+    function userInteractionCallback() {
+      // Third-party cookies are now allowed.
+      const verify3pAllowedUrl = new URL(
+        `./third-party-cookies-cross-site-popup-verify.html?desc=3P_fetch_with_heuristics&origin=${encodeURIComponent(origin)}`,
+        crossSiteOrigin);
+      const verify3pAllowedPopup = window.open(verify3pAllowedUrl);
+      fetch_tests_from_window(verify3pAllowedPopup);
+    };
+
+    test_driver.set_test_context(window.opener.opener);
+    test_driver.click(document.getElementById("button"));
+
+  </script>
+</body>
diff --git a/tests/wpt/tests/cookies/third-party-cookies/third-party-cookie-heuristics.tentative.https.html b/tests/wpt/tests/cookies/third-party-cookies/third-party-cookie-heuristics.tentative.https.html
new file mode 100644
index 00000000000..3eb70432b94
--- /dev/null
+++ b/tests/wpt/tests/cookies/third-party-cookies/third-party-cookie-heuristics.tentative.https.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<title>Test third-party cookie heuristics</title>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>
+
+<body>
+  <script>
+    document.body.onload = async () => {
+      // Set SameSite=None cookie in a 1P context using HTTP.
+      const attributes = "Secure;Path=/;SameSite=None";
+      const httpCookieName = "1P_http";
+      await credFetch(
+        `${self.origin}/cookies/resources/set.py?${httpCookieName}=foobar;${attributes}`);
+
+      // Set another cookie using document.cookie.
+      const domCookieName = "1P_dom";
+      document.cookie = `${domCookieName}=foobar;${attributes}`;
+
+      const cookieNames = [httpCookieName, domCookieName];
+
+      // Set another cookie using the CookieStore API, if supported.
+      if (window.cookieStore) {
+        const cookieStoreCookieName = "1P_cs";
+        await cookieStore.set({
+          name: cookieStoreCookieName,
+          value: "foobar",
+          path: "/",
+          sameSite: "none",
+        });
+        cookieNames.push(cookieStoreCookieName);
+      }
+
+      // Open a cross-site window which will open a popup with the current origin.
+      const crossSiteUrl = new URL(
+        `./resources/third-party-cookies-cross-site-popup-opener.html?origin=${encodeURIComponent(self.origin)}`,
+        get_host_info().HTTPS_NOTSAMESITE_ORIGIN + self.location.pathname);
+      const popup = window.open(crossSiteUrl);
+      fetch_tests_from_window(popup);
+    };
+
+  </script>
+</body>
diff --git a/tests/wpt/tests/cookies/third-party-cookies/third-party-cookies.tentative.https.html b/tests/wpt/tests/cookies/third-party-cookies/third-party-cookies.tentative.https.html
index 184649ff5bc..018849c8279 100644
--- a/tests/wpt/tests/cookies/third-party-cookies/third-party-cookies.tentative.https.html
+++ b/tests/wpt/tests/cookies/third-party-cookies/third-party-cookies.tentative.https.html
@@ -61,7 +61,7 @@ document.body.onload = async () => {
   // Open a cross-site window which will embed the current origin in a
   // third-party context.
   const crossSiteUrl = new URL(
-      `./resources/third-party-cookies-cross-site-window.html?origin=${
+      `./resources/third-party-cookies-cross-site-embedder.html?origin=${
           encodeURIComponent(self.origin)}`,
       get_host_info().HTTPS_NOTSAMESITE_ORIGIN + self.location.pathname);
   const popup = window.open(crossSiteUrl);
diff --git a/tests/wpt/tests/credential-management/fedcm-button-mode-basics.https.html b/tests/wpt/tests/credential-management/fedcm-button-mode-basics.https.html
new file mode 100644
index 00000000000..d7b063fca55
--- /dev/null
+++ b/tests/wpt/tests/credential-management/fedcm-button-mode-basics.https.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<title>Federated Credential Management API auto selected flag tests.</title>
+<link rel="help" href="https://fedidcg.github.io/FedCM">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<script type="module">
+import {request_options_with_mediation_required,
+        fedcm_test,
+        select_manifest,
+        fedcm_get_and_select_first_account} from './support/fedcm-helper.sub.js';
+
+fedcm_test(async t => {
+  let test_options = request_options_with_mediation_required();
+  test_options.identity.mode = "button";
+
+  let result = navigator.credentials.get(test_options);
+  return promise_rejects_dom(t, 'NetworkError', result);
+}, "Test that the button mode without user activation will fail.");
+
+fedcm_test(async t => {
+  let test_options = request_options_with_mediation_required("manifest_with_rp_mode.json");
+  test_options.identity.mode = "button";
+
+  return test_driver.bless('initiate FedCM request', async function() {
+      let cred = await fedcm_get_and_select_first_account(t, test_options);
+      assert_equals(cred.token, "mode=button");
+  });
+}, "Test that the button mode requires user activation.");
+
+</script>
diff --git a/tests/wpt/tests/credential-management/support/fedcm/manifest_with_rp_mode.json b/tests/wpt/tests/credential-management/support/fedcm/manifest_with_rp_mode.json
new file mode 100644
index 00000000000..5692fd91905
--- /dev/null
+++ b/tests/wpt/tests/credential-management/support/fedcm/manifest_with_rp_mode.json
@@ -0,0 +1,6 @@
+{
+  "accounts_endpoint": "two_accounts.py",
+  "client_metadata_endpoint": "client_metadata.py",
+  "id_assertion_endpoint": "token_with_rp_mode.py",
+  "login_url": "login.html"
+}
diff --git a/tests/wpt/tests/credential-management/support/fedcm/token_with_rp_mode.py b/tests/wpt/tests/credential-management/support/fedcm/token_with_rp_mode.py
new file mode 100644
index 00000000000..515736416f4
--- /dev/null
+++ b/tests/wpt/tests/credential-management/support/fedcm/token_with_rp_mode.py
@@ -0,0 +1,12 @@
+import importlib
+error_checker = importlib.import_module("credential-management.support.fedcm.request-params-check")
+
+def main(request, response):
+  request_error = error_checker.tokenCheck(request)
+  if (request_error):
+    return request_error
+
+  response.headers.set(b"Content-Type", b"application/json")
+
+  rp_mode = request.POST.get(b"mode")
+  return "{\"token\": \"mode=" + rp_mode.decode("utf-8") + "\"}"
diff --git a/tests/wpt/tests/css/CSS2/borders/border-left-width-078.xht b/tests/wpt/tests/css/CSS2/borders/border-left-width-078.xht
index 4b79c7e7a3f..c9dcbee1969 100644
--- a/tests/wpt/tests/css/CSS2/borders/border-left-width-078.xht
+++ b/tests/wpt/tests/css/CSS2/borders/border-left-width-078.xht
@@ -27,6 +27,7 @@
                 border-left-width: -1ex;
             }
         </style>
+        <link rel="match" href="border-left-width-001-ref.xht" />
     </head>
     <body>
         <p>Test passes if the 2 black lines have the <strong>same width</strong>.</p>
diff --git a/tests/wpt/tests/css/CSS2/cascade-import/cascade-import-001.xht b/tests/wpt/tests/css/CSS2/cascade-import/cascade-import-001.xht
index 6068c6ab7ec..470d81571c0 100644
--- a/tests/wpt/tests/css/CSS2/cascade-import/cascade-import-001.xht
+++ b/tests/wpt/tests/css/CSS2/cascade-import/cascade-import-001.xht
@@ -12,6 +12,7 @@
    @import url(data:text/css,@import%20url\(data:text/css,.test%2520%257B%2520background:%2520maroon;%2520color:%2520white;%2520%257D\);%0D%0A.test.test%20%7B%20background:%20green;%20color:%20white;%20%7D);
    p { color: yellow; background: red; }
   </style>
+  <link rel="match" href="/css/CSS2/syntax/character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="test">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001-ref.xht b/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001-ref.xht
index 25dcde18595..b2cbf53f9ad 100644
--- a/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001-ref.xht
+++ b/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001-ref.xht
@@ -16,6 +16,5 @@
   <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
   <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
   <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
-  <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
  </body>
 </html>
diff --git a/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001.xht b/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001.xht
index 8b83eb8316c..3287719b0a1 100644
--- a/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001.xht
+++ b/tests/wpt/tests/css/CSS2/css1/c541-word-sp-001.xht
@@ -14,8 +14,7 @@
    div { font: 25px/1 Ahem; width: 12em; background: yellow; color: aqua; margin: 0 0 0 2em; }
    .eight {word-spacing: 25px;}
    .nine {word-spacing: normal;}
-   .ten {word-spacing: 300%;}
-   .eleven {word-spacing: -1em;}
+   .ten {word-spacing: -1em;}
    .fill { color: yellow; }
   ]]></style>
   <link rel="help" href="http://www.w3.org/TR/CSS21/text.html#spacing-props" title="16.4 Letter and word spacing: the 'letter-spacing' and 'word-spacing' properties"/>
@@ -26,7 +25,6 @@
   <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
   <div class="test">x&#xA0;&#xA0;x&#xA0;&#xA0;xx&#xA0;xx</div>
   <div class="eight"> x x <span class="nine">xx xx</span> </div>
-  <div class="ten"> x&#xA0; x &#xA0;xx xx </div>
-  <div class="eleven"> x&#xA0; &#xA0;<span class="nine"> &#xA0;</span>x&#xA0;&#xA0;<span class="fill">xx</span> xx&#xA0; <span class="fill">x</span>xx </div>
+  <div class="ten"> x&#xA0; &#xA0;<span class="nine"> &#xA0;</span>x&#xA0;&#xA0;<span class="fill">xx</span> xx&#xA0; <span class="fill">x</span>xx </div>
  </body>
 </html>
diff --git a/tests/wpt/tests/css/CSS2/floats/float-no-interpolation.html b/tests/wpt/tests/css/CSS2/floats/float-no-interpolation.html
index eb06dfefc68..92befefda1e 100644
--- a/tests/wpt/tests/css/CSS2/floats/float-no-interpolation.html
+++ b/tests/wpt/tests/css/CSS2/floats/float-no-interpolation.html
@@ -7,9 +7,24 @@
 
 <body>
 <script>
+// Use default transition-behavior: normal.
 test_no_interpolation({
   property: 'float',
   from: 'initial',
   to: 'right'
 });
+
+test_interpolation({
+  property: 'float',
+  behavior: 'allow-discrete',
+  from: 'left',
+  to: 'right',
+}, [
+  {at: -1, expect: 'left'},
+  {at: 0, expect: 'left'},
+  {at: 0.4, expect: 'left'},
+  {at: 0.5, expect: 'right'},
+  {at: 1, expect: 'right'},
+  {at: 1.5, expect: 'right'},
+]);
 </script>
diff --git a/tests/wpt/tests/css/CSS2/fonts/font-size-119.xht b/tests/wpt/tests/css/CSS2/fonts/font-size-119.xht
index 8141516c7d7..48088e0cacf 100644
--- a/tests/wpt/tests/css/CSS2/fonts/font-size-119.xht
+++ b/tests/wpt/tests/css/CSS2/fonts/font-size-119.xht
@@ -23,6 +23,7 @@
     .p { color: green; }
 
   ]]></style>
+  <link rel="match" href="/css/CSS2/reference/ref-if-there-is-no-red.xht" />
  </head>
  <body class="test">
   <p>Test passes if there is <strong>no red</strong>.</p>
diff --git a/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-006.xht b/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-006.xht
index 7d142e1794e..f338379bbba 100644
--- a/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-006.xht
+++ b/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-006.xht
@@ -15,6 +15,7 @@
                 vertical-align: baseline;
             }
         </style>
+        <link rel="match" href="vertical-align-baseline-007-ref.xht" />
     </head>
     <body>
         <p>Test passes if the bottoms of all the 'X's are aligned.</p>
diff --git a/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-010.xht b/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-010.xht
index 1e5a0df855c..ffe3c8755b9 100644
--- a/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-010.xht
+++ b/tests/wpt/tests/css/CSS2/linebox/vertical-align-baseline-010.xht
@@ -17,6 +17,7 @@
                 vertical-align: baseline;
             }
         </style>
+        <link rel="match" href="vertical-align-baseline-007-ref.xht" />
     </head>
     <body>
         <p>Test passes if the bottoms of all the 'X's are aligned.</p>
diff --git a/tests/wpt/tests/css/CSS2/lists/counter-increment-auto-reset-001.xht b/tests/wpt/tests/css/CSS2/lists/counter-increment-auto-reset-001.xht
index e2951607445..ed0203b1aa9 100644
--- a/tests/wpt/tests/css/CSS2/lists/counter-increment-auto-reset-001.xht
+++ b/tests/wpt/tests/css/CSS2/lists/counter-increment-auto-reset-001.xht
@@ -15,6 +15,7 @@
                 content: counter(outofscope);
             }
         </style>
+        <link rel="match" href="/css/CSS2/generated-content/content-auto-reset-001-ref.html" />
     </head>
     <body>
         <p>Test passes if there is the number '0' below.</p>
diff --git a/tests/wpt/tests/css/CSS2/lists/counter-increment-display-001.xht b/tests/wpt/tests/css/CSS2/lists/counter-increment-display-001.xht
index e4d8630fb30..5118b827a69 100644
--- a/tests/wpt/tests/css/CSS2/lists/counter-increment-display-001.xht
+++ b/tests/wpt/tests/css/CSS2/lists/counter-increment-display-001.xht
@@ -16,6 +16,7 @@
                 content: counter(hidden);
             }
         </style>
+        <link rel="match" href="/css/CSS2/generated-content/content-auto-reset-001-ref.html" />
     </head>
     <body>
         <p>Test passes if there is the number '0' below.</p>
diff --git a/tests/wpt/tests/css/CSS2/lists/counter-increment-not-generated-001.xht b/tests/wpt/tests/css/CSS2/lists/counter-increment-not-generated-001.xht
index 641eafd7191..1828797e3ca 100644
--- a/tests/wpt/tests/css/CSS2/lists/counter-increment-not-generated-001.xht
+++ b/tests/wpt/tests/css/CSS2/lists/counter-increment-not-generated-001.xht
@@ -16,6 +16,7 @@
                 content: counter(notgenerated);
             }
         </style>
+        <link rel="match" href="/css/CSS2/generated-content/content-auto-reset-001-ref.html" />
     </head>
     <body>
         <p>Test passes if there is the number '0' below.</p>
diff --git a/tests/wpt/tests/css/CSS2/lists/counter-reset-display-001.xht b/tests/wpt/tests/css/CSS2/lists/counter-reset-display-001.xht
index a6c1b389f15..f18f007d964 100644
--- a/tests/wpt/tests/css/CSS2/lists/counter-reset-display-001.xht
+++ b/tests/wpt/tests/css/CSS2/lists/counter-reset-display-001.xht
@@ -16,6 +16,7 @@
                 content: counter(hidden);
             }
         </style>
+        <link rel="match" href="/css/CSS2/generated-content/content-auto-reset-001-ref.html" />
     </head>
     <body>
         <p>Test passes if there is the number '0' below.</p>
diff --git a/tests/wpt/tests/css/CSS2/lists/counter-reset-not-generated-001.xht b/tests/wpt/tests/css/CSS2/lists/counter-reset-not-generated-001.xht
index 1aa6e9a4c3d..d745a77ec34 100644
--- a/tests/wpt/tests/css/CSS2/lists/counter-reset-not-generated-001.xht
+++ b/tests/wpt/tests/css/CSS2/lists/counter-reset-not-generated-001.xht
@@ -16,6 +16,7 @@
                 content: counter(notgenerated);
             }
         </style>
+        <link rel="match" href="/css/CSS2/generated-content/content-auto-reset-001-ref.html" />
     </head>
     <body>
         <p>Test passes if there is the number '0' below.</p>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-012.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-012.xht
index 1111ea88285..66fcabdd1d9 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-012.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-012.xht
@@ -33,6 +33,7 @@
                 position: absolute;
             }
         </style>
+        <link rel="match" href="margin-collapse-002-ref.xht" />
     </head>
     <body>
         <p>Test passes if there is <strong>no red</strong>.</p>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht
index 64bb4049826..1ca6e942979 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-001.xht
@@ -14,6 +14,7 @@
     div.box2 { background-color: aqua; float: left; width: 20px; height: 20px; }
     div.box3 { margin-top: 50px; height: 50px; background-color: orange; }
   </style>
+  <link rel="match" href="/css/CSS2/floats-clear/margin-collapse-clear-002-ref.xht" />
  </head>
  <body>
   <p>The coloured bars on the left should match the coloured boxes in the black box.</p>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht
index 4c320ac1876..b48e1904c43 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-collapse-clear-007.xht
@@ -15,6 +15,7 @@
     div.box2 { background-color: aqua; float: left; width: 20px; height: 20px; }
     div.box3 { overflow: hidden; margin-top: 50px; height: 50px; background-color: orange; }
   </style>
+  <link rel="match" href="/css/CSS2/floats-clear/margin-collapse-clear-002-ref.xht" />
  </head>
  <body>
   <p>The coloured bars on the left should match the coloured boxes in the black box.</p>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht
index 2121019ae84..2b57f0fccd8 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/margin-left-applies-to-008.xht
@@ -22,6 +22,7 @@
                 margin-left: 50px;
             }
         </style>
+        <link rel="match" href="padding-left-applies-to-008-ref.xht" />
     </head>
     <body>
         <p>Test passes if there is space between the blue and orange lines.</p>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-016.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-016.xht
index 7023f79cd11..7f48da03791 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-016.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-016.xht
@@ -19,6 +19,7 @@
    span.control { background: green; color: white; }
    span.test { padding-top: 10em; }
   </style>
+  <link rel="match" href="/css/CSS2/floats-clear/floats-125-ref.xht" />
  </head>
  <body>
   <table>
diff --git a/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-017.xht b/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-017.xht
index 8ff267c081c..03740e4ed94 100644
--- a/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-017.xht
+++ b/tests/wpt/tests/css/CSS2/margin-padding-clear/padding-applies-to-017.xht
@@ -18,6 +18,7 @@
    span.control { background: green; color: white; }
    span.test { padding-bottom: 10em; }
   </style>
+  <link rel="match" href="/css/CSS2/floats-clear/floats-124-ref.xht" />
  </head>
  <body>
   <table>
diff --git a/tests/wpt/tests/css/CSS2/normal-flow/block-non-replaced-width-002.xht b/tests/wpt/tests/css/CSS2/normal-flow/block-non-replaced-width-002.xht
index cf14e37ab7e..3d9756b0054 100644
--- a/tests/wpt/tests/css/CSS2/normal-flow/block-non-replaced-width-002.xht
+++ b/tests/wpt/tests/css/CSS2/normal-flow/block-non-replaced-width-002.xht
@@ -31,6 +31,7 @@
                 width: 150px;
             }
         </style>
+        <link rel="match" href="block-non-replaced-width-001-ref.xht" />
     </head>
     <body>
         <p>Test passes if the orange and blue rectangles have the <strong>same width</strong>.</p>
diff --git a/tests/wpt/tests/css/CSS2/normal-flow/max-width-014.xht b/tests/wpt/tests/css/CSS2/normal-flow/max-width-014.xht
index 83c75c6528d..617ccc45ee0 100644
--- a/tests/wpt/tests/css/CSS2/normal-flow/max-width-014.xht
+++ b/tests/wpt/tests/css/CSS2/normal-flow/max-width-014.xht
@@ -16,6 +16,7 @@
                 width: 72pt;
             }
         </style>
+        <link rel="match" href="max-width-003-ref.xht" />
     </head>
     <body>
         <p>Test passes if there is a thin vertical line.</p>
diff --git a/tests/wpt/tests/css/CSS2/normal-flow/min-width-014.xht b/tests/wpt/tests/css/CSS2/normal-flow/min-width-014.xht
index 538b701cd65..87d2e4085f7 100644
--- a/tests/wpt/tests/css/CSS2/normal-flow/min-width-014.xht
+++ b/tests/wpt/tests/css/CSS2/normal-flow/min-width-014.xht
@@ -16,6 +16,7 @@
                 width: 0;
             }
         </style>
+        <link rel="match" href="max-width-003-ref.xht" />
     </head>
     <body>
         <p>Test passes if there is a thin vertical line.</p>
diff --git a/tests/wpt/tests/css/CSS2/normal-flow/width-014.xht b/tests/wpt/tests/css/CSS2/normal-flow/width-014.xht
index c0094c463b5..157f67d9d11 100644
--- a/tests/wpt/tests/css/CSS2/normal-flow/width-014.xht
+++ b/tests/wpt/tests/css/CSS2/normal-flow/width-014.xht
@@ -15,6 +15,7 @@
                 width: 1pt;
             }
         </style>
+        <link rel="match" href="max-width-003-ref.xht" />
     </head>
     <body>
         <p>Test passes if there is a thin vertical line.</p>
diff --git a/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-007.xht b/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-007.xht
index 6cdacc60582..f2837ba7b92 100644
--- a/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-007.xht
+++ b/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-007.xht
@@ -10,6 +10,7 @@
    div div { float: right; }
    :first-line { color: green; }
   </style>
+  <link rel="match" href="/css/CSS2/cascade/cascade-012-ref.xht" />
  </head>
  <body>
   <div>
diff --git a/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-008.xht b/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-008.xht
index 19b867f7e12..f9193767332 100644
--- a/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-008.xht
+++ b/tests/wpt/tests/css/CSS2/selectors/first-line-pseudo-008.xht
@@ -10,6 +10,7 @@
    div div { display: none; }
    :first-line { color: green; }
   </style>
+  <link rel="match" href="/css/CSS2/cascade/cascade-012-ref.xht" />
  </head>
  <body>
   <div>
diff --git a/tests/wpt/tests/css/CSS2/selectors/first-line-selector-004.xht b/tests/wpt/tests/css/CSS2/selectors/first-line-selector-004.xht
index b19368d4ba7..8759b830b1d 100644
--- a/tests/wpt/tests/css/CSS2/selectors/first-line-selector-004.xht
+++ b/tests/wpt/tests/css/CSS2/selectors/first-line-selector-004.xht
@@ -11,6 +11,7 @@
                 color: green;
             }
         </style>
+        <link rel="match" href="/css/CSS2/reference/filler-text-below-green.xht" />
     </head>
     <body>
         <p>Test passes if the "Filler Text" below is green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-031.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-031.xht
index 3e8bac6a3fe..a5f5388b206 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-031.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-031.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-031.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#xE9;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-032.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-032.xht
index 04c6cf4d1f8..96a6023de70 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-032.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-032.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-032.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x0E49;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-033.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-033.xht
index 8042c899f37..b3a3f417bc9 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-033.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-033.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-033.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x0449;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-034.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-034.xht
index ab6ded6bd3e..11cf7b55659 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-034.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-034.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-034.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x0649;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-035.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-035.xht
index 12896b0f756..4ef48e66b94 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-035.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-035.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-035.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x03B9;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-036.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-036.xht
index 2a9ab495c20..f6aa7bffdf3 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-036.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-036.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-036.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x05D9;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/CSS2/syntax/character-encoding-037.xht b/tests/wpt/tests/css/CSS2/syntax/character-encoding-037.xht
index 02c28caf1f5..bb8b76c4a1f 100644
--- a/tests/wpt/tests/css/CSS2/syntax/character-encoding-037.xht
+++ b/tests/wpt/tests/css/CSS2/syntax/character-encoding-037.xht
@@ -11,6 +11,7 @@
    p { background: red; color: yellow; }
   </style>
   <link rel="stylesheet" href="support/character-encoding-037.css"/>
+  <link rel="match" href="character-encoding-041-ref.xht" />
  </head>
  <body>
   <p class="t&#x0418;st">This line should be green.</p>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-position-circular.html b/tests/wpt/tests/css/css-anchor-position/anchor-position-circular.html
new file mode 100644
index 00000000000..8efbeb09e20
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-position-circular.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<title>Tests circular anchor relasionship</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-position-circular-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: orange;
+  anchor-name: --a2;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: green;
+  anchor-name: --a1;
+}
+
+</style>
+
+<div id="anchored1"></div>
+<div id="anchored2"></div>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-001.tentative.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-001.tentative.html
new file mode 100644
index 00000000000..60ad1280226
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-001.tentative.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to another anchored element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-chained-001.tentative-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  anchor-name: --a1;
+  height: 20px;
+  background: orange;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+  anchor-name: --a2;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: lime;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 230px"></div>
+  <div id="anchor"></div>
+  <div style="height: 230px"></div>
+</div>
+<div id="anchored1"></div>
+<div id="anchored2"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-002.tentative.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-002.tentative.html
new file mode 100644
index 00000000000..e180c564682
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-002.tentative.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to another anchored element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-chained-002.tentative-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller1 {
+  width: 200px;
+  height: 200px;
+  position: relative;
+}
+
+#scroller1,#scroller2 {
+  overflow: scroll;
+}
+
+#anchor {
+  anchor-name: --a1;
+  height: 20px;
+  background: orange;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+  anchor-name: --a2;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: lime;
+}
+
+</style>
+
+<div id="scroller1">
+  <div style="height: 100px"></div>
+  <div id="scroller2">
+    <div style="height: 230px"></div>
+    <div id="anchor"></div>
+    <div style="height: 230px"></div>
+  </div>
+  <div style="height: 100px"></div>
+  <div id="anchored1"></div>
+</div>
+<div id="anchored2"></div>
+
+<script>
+scroller1.scrollTop = 80;
+scroller2.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-003.tentative.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-003.tentative.html
new file mode 100644
index 00000000000..8912fcb6994
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-003.tentative.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to another anchored element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-chained-002.tentative-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller1 {
+  width: 200px;
+  height: 200px;
+  position: relative;
+}
+
+#scroller1,#scroller2 {
+  overflow: scroll;
+}
+
+#anchor {
+  anchor-name: --a1;
+  height: 20px;
+  background: orange;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+  anchor-name: --a2;
+  z-index: 1;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: lime;
+  z-index: 1;
+}
+
+</style>
+
+<div id="anchored2"></div>
+<div id="scroller1">
+  <div id="anchored1"></div>
+  <div style="height: 100px"></div>
+  <div id="scroller2">
+    <div style="height: 230px"></div>
+    <div id="anchor"></div>
+    <div style="height: 230px"></div>
+  </div>
+  <div style="height: 100px"></div>
+</div>
+
+<script>
+scroller1.scrollTop = 80;
+scroller2.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-004.tentative.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-004.tentative.html
new file mode 100644
index 00000000000..5834eb1f4cb
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-004.tentative.html
@@ -0,0 +1,78 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to another anchored element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-chained-004.tentative-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller1 {
+  width: 200px;
+  height: 200px;
+  position: relative;
+}
+
+#scroller1,#scroller2,#scroller3 {
+  overflow: scroll;
+}
+
+#anchor1 {
+  anchor-name: --a1;
+  height: 20px;
+  background: orange;
+}
+
+#anchor2 {
+  anchor-name: --a2;
+  height: 20px;
+  background: cyan;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: lime;
+}
+
+</style>
+
+<div id="scroller1">
+  <div style="height: 100px"></div>
+  <div id="scroller2">
+    <div style="height: 230px"></div>
+    <div id="anchor1"></div>
+    <div style="height: 230px"></div>
+  </div>
+  <div style="height: 100px"></div>
+  <div id="anchored1">
+    <div id="scroller3">
+      <div style="height: 230px"></div>
+      <div id="anchor2"></div>
+      <div style="height: 230px"></div>
+    </div>
+  </div>
+</div>
+<div id="anchored2"></div>
+
+<script>
+scroller1.scrollTop = 80;
+scroller2.scrollTop = 200;
+scroller3.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-fallback.tentative.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-fallback.tentative.html
new file mode 100644
index 00000000000..bc7e231e7ce
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-chained-fallback.tentative.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to another anchored element with fallback</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-chained-fallback.tentative-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+  width: 300px;
+  height: 300px;
+}
+
+#anchor {
+  anchor-name: --a1;
+  background: orange;
+  margin: 250px 0;
+}
+
+#anchored1 {
+  position: absolute;
+  anchor-default: --a1;
+  background: green;
+  position-fallback: --fallback;
+  anchor-name: --a2;
+}
+
+#anchored2 {
+  position: absolute;
+  anchor-default: --a2;
+  left: anchor(--a2 left);
+  top: anchor(--a2 bottom);
+  background: lime;
+}
+
+@position-fallback --fallback {
+  @try {
+    left: anchor(--a1 left);
+    bottom: anchor(--a1 top);
+  }
+  @try {
+    left: anchor(--a1 right);
+    top: anchor(--a1 top);
+  }
+}
+
+</style>
+
+<div id="scroller">
+  <div id="anchor"></div>
+</div>
+<div id="anchored1"></div>
+<div id="anchored2"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html
new file mode 100644
index 00000000000..5b2aa2dd50b
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-fixedpos-002.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<title>Tests that scroll adjustments of fixed-positioned elements are applied correctly</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-fixedpos-002-ref.html">
+<style>
+body {
+  margin: 0;
+  height: 2000px;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#anchor {
+  position: fixed;
+  anchor-name: --a1;
+  margin: 300px;
+  background: orange;
+}
+
+#anchored {
+  position: fixed;
+  anchor-default: --a1;
+  left: anchor(--a1 right);
+  top: anchor(--a1 top);
+  background: green;
+}
+
+</style>
+
+<div id="anchor"></div>
+<div id="anchored"></div>
+
+<script>
+document.documentElement.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-001.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-001.html
new file mode 100644
index 00000000000..abab944751e
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-001.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to a sticky-position element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-to-sticky-001-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  anchor-name: --a1;
+  position: sticky;
+  top: 0;
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 50px"></div>
+  <div id="anchor"></div>
+  <div style="height: 300px"></div>
+</div>
+<div id="anchored"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-002.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-002.html
new file mode 100644
index 00000000000..357421ecf1b
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-002.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to a sticky-position element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-to-sticky-002-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+  position: relative;
+}
+
+#anchor {
+  anchor-name: --a1;
+  position: sticky;
+  top: 0;
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+}
+
+</style>
+
+<!-- Anchored to sibling sticky-positioned. -->
+<div id="scroller">
+  <div style="height: 50px"></div>
+  <div id="anchor"></div>
+  <div style="height: 300px"></div>
+  <div id="anchored"></div>
+</div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-003.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-003.html
new file mode 100644
index 00000000000..0e770044913
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-003.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to a sticky-position element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-to-sticky-001-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  anchor-name: --a1;
+  position: sticky;
+  top: 0;
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+}
+
+</style>
+
+<!-- Anchored to later sticky-positioned. -->
+<div id="anchored"></div>
+<div id="scroller">
+  <div style="height: 50px"></div>
+  <div id="anchor"></div>
+  <div style="height: 300px"></div>
+</div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-004.html b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-004.html
new file mode 100644
index 00000000000..f7878ae8df8
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/anchor-scroll-to-sticky-004.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<title>Tests scroll adjustments of element anchored to a sticky-position element</title>
+<link rel="author" href="mailto:wangxianzhu@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/">
+<link rel="match" href="reference/anchor-scroll-to-sticky-004-ref.html">
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+.sticky {
+  position: sticky;
+  top: 0;
+}
+
+#anchor {
+  anchor-name: --a1;
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  anchor-default: --a1;
+  left: anchor(--a1 left);
+  top: anchor(--a1 bottom);
+  background: green;
+}
+
+</style>
+
+<!-- Anchored to later nested sticky elements. -->
+<div id="anchored"></div>
+<div id="scroller">
+  <div style="height: 50px"></div>
+  <div class="sticky">
+    <div style="height: 50px"></div>
+    <div id="anchor" class="sticky"></div>
+    <div style="height: 50px"></div>
+  </div>
+  <div style="height: 300px"></div>
+</div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-position-circular-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-position-circular-ref.html
new file mode 100644
index 00000000000..6beb7c77e99
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-position-circular-ref.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<style>
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#anchored1 {
+  position: absolute;
+  left: 0;
+  top: 0;
+  background: orange;
+}
+
+#anchored2 {
+  position: absolute;
+  left: 0;
+  top: 100px;
+  background: green;
+}
+</style>
+
+<div id="anchored1"></div>
+<div id="anchored2"></div>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-001.tentative-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-001.tentative-ref.html
new file mode 100644
index 00000000000..fb858cc1052
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-001.tentative-ref.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  height: 20px;
+  background: orange;
+}
+
+#anchored1 {
+  position: absolute;
+  top: 50px;
+  left: 0;
+  background: green;
+}
+
+#anchored2 {
+  position: absolute;
+  top: 150px;
+  left: 0;
+  background: lime;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 230px"></div>
+  <div id="anchor"></div>
+  <div style="height: 230px"></div>
+</div>
+<div id="anchored1"></div>
+<div id="anchored2"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-002.tentative-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-002.tentative-ref.html
new file mode 100644
index 00000000000..9dde5d00f00
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-002.tentative-ref.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller1 {
+  width: 200px;
+  height: 200px;
+}
+
+#scroller1,#scroller2 {
+  overflow: scroll;
+}
+
+#anchor {
+  height: 20px;
+  background: orange;
+}
+
+#anchored1 {
+  position: absolute;
+  top: 70px;
+  background: green;
+}
+
+#anchored2 {
+  position: absolute;
+  top: 170px;
+  background: lime;
+}
+
+</style>
+
+<div id="scroller1">
+  <div style="height: 100px"></div>
+  <div id="scroller2">
+    <div style="height: 230px"></div>
+    <div id="anchor"></div>
+    <div style="height: 230px"></div>
+  </div>
+  <div style="height: 250px"></div>
+</div>
+<div id="anchored1"></div>
+<div id="anchored2"></div>
+
+<script>
+scroller1.scrollTop = 80;
+scroller2.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-004.tentative-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-004.tentative-ref.html
new file mode 100644
index 00000000000..22c2270ddea
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-004.tentative-ref.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+  height: 700px;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller1 {
+  width: 200px;
+  height: 200px;
+  position: relative;
+}
+
+#scroller1,#scroller2,#scroller3 {
+  overflow: scroll;
+}
+
+#anchor1 {
+  height: 20px;
+  background: orange;
+}
+
+#anchor2 {
+  height: 20px;
+  background: cyan;
+}
+
+#anchored1 {
+  position: absolute;
+  top: 70px;
+  background: green;
+}
+
+#anchored2 {
+  position: absolute;
+  top: 120px;
+  background: lime;
+}
+</style>
+
+<div id="scroller1">
+  <div style="height: 100px"></div>
+  <div id="scroller2">
+    <div style="height: 230px"></div>
+    <div id="anchor1"></div>
+    <div style="height: 230px"></div>
+  </div>
+  <div style="height: 250px"></div>
+</div>
+<div id="anchored1">
+  <div id="scroller3">
+    <div style="height: 230px"></div>
+    <div id="anchor2"></div>
+    <div style="height: 230px"></div>
+  </div>
+</div>
+<div id="anchored2"></div>
+
+<script>
+scroller1.scrollTop = 80;
+scroller2.scrollTop = 200;
+scroller3.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-fallback.tentative-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-fallback.tentative-ref.html
new file mode 100644
index 00000000000..0933430fc3b
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-chained-fallback.tentative-ref.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+  width: 300px;
+  height: 300px;
+}
+
+#anchor {
+  background: orange;
+  margin: 250px 0;
+}
+
+#anchored1 {
+  position: absolute;
+  background: green;
+  top: 50px;
+  left: 100px;
+}
+
+#anchored2 {
+  position: absolute;
+  background: lime;
+  top: 150px;
+  left: 100px;
+}
+</style>
+
+<div id="scroller">
+  <div id="anchor"></div>
+</div>
+<div id="anchored1"></div>
+<div id="anchored2"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-fixedpos-002-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-fixedpos-002-ref.html
new file mode 100644
index 00000000000..7bae7bfbb82
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-fixedpos-002-ref.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+  height: 2000px;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#anchor {
+  position: fixed;
+  left: 300px;
+  top: 300px;
+  background: orange;
+}
+
+#anchored {
+  position: fixed;
+  left: 400px;
+  top: 300px;
+  background: green;
+}
+
+</style>
+
+<div id="anchor"></div>
+<div id="anchored"></div>
+
+<script>
+document.documentElement.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-001-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-001-ref.html
new file mode 100644
index 00000000000..2327b50607d
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-001-ref.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  top: 20px;
+  left: 0;
+  background: green;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 200px"></div>
+  <div id="anchor"></div>
+  <div style="height: 150px"></div>
+</div>
+<div id="anchored"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-002-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-002-ref.html
new file mode 100644
index 00000000000..d08d3545d6a
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-002-ref.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  background: green;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 200px"></div>
+  <div id="anchor"></div>
+  <div id="anchored"></div>
+  <div style="height: 50px"></div>
+</div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-004-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-004-ref.html
new file mode 100644
index 00000000000..d97b4ffc145
--- /dev/null
+++ b/tests/wpt/tests/css/css-anchor-position/reference/anchor-scroll-to-sticky-004-ref.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+
+div {
+  width: 100px;
+  height: 100px;
+}
+
+#scroller {
+  overflow: scroll;
+}
+
+#anchor {
+  height: 20px;
+  background: orange;
+}
+
+#anchored {
+  position: absolute;
+  top: 70px;
+  left: 0;
+  background: green;
+}
+
+</style>
+
+<div id="scroller">
+  <div style="height: 250px"></div>
+  <div id="anchor"></div>
+  <div style="height: 180px"></div>
+</div>
+<div id="anchored"></div>
+
+<script>
+scroller.scrollTop = 200;
+</script>
diff --git a/tests/wpt/tests/css/css-anchor-position/reference/sticky-anchor-position-invalid-ref.html b/tests/wpt/tests/css/css-anchor-position/reference/sticky-anchor-position-invalid-ref.html
index 3a487558744..c4a5dd37354 100644
--- a/tests/wpt/tests/css/css-anchor-position/reference/sticky-anchor-position-invalid-ref.html
+++ b/tests/wpt/tests/css/css-anchor-position/reference/sticky-anchor-position-invalid-ref.html
@@ -15,6 +15,7 @@
   position: sticky;
   height: 150px;
   background: green;
+  top: 42px;
 }
 </style>
 <div id="scroll-container">
diff --git a/tests/wpt/tests/css/css-anchor-position/sticky-anchor-position-invalid.html b/tests/wpt/tests/css/css-anchor-position/sticky-anchor-position-invalid.html
index f7c1e1a374f..d1efeed5f29 100644
--- a/tests/wpt/tests/css/css-anchor-position/sticky-anchor-position-invalid.html
+++ b/tests/wpt/tests/css/css-anchor-position/sticky-anchor-position-invalid.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <title>Anchor queries in sticky positioning is invalid</title>
 <link rel="author" href="mailto:xiaochengh@chromium.org">
-<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#queries">
+<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#valid-anchor-function">
 <link rel="match" href="reference/sticky-anchor-position-invalid-ref.html">
 <style>
 #scroll-container {
@@ -18,7 +18,7 @@
   position: sticky;
   height: 150px;
   background: green;
-  top: anchor(--invalid top); /* should be invalid and treated as auto */
+  top: anchor(--invalid top, 42px); /* Should use the fallback */
 }
 </style>
 <div id="scroll-container">
diff --git a/tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions-tentative.html b/tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions.html
similarity index 91%
rename from tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions-tentative.html
rename to tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions.html
index 70539beb263..4286a11c697 100644
--- a/tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions-tentative.html
+++ b/tests/wpt/tests/css/css-borders/border-image-width-interpolation-math-functions.html
@@ -5,6 +5,7 @@
     <title>border-image-width interpolation with css math functions</title>
     <link rel="author" title="Daniil Sakhapov" href="mailto:sakhapov@chromium.org">
     <link rel="help" href="https://drafts.csswg.org/css-backgrounds/#the-border-image-width">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
@@ -32,7 +33,7 @@
       test_interpolation({
         property: 'border-image-width',
         from: 'calc(sign(20rem - 20px) * 100)',
-        to: 'calc(progress(10rem from 20px to 100px) * 180)',
+        to: 'calc(sign(20rem - 20px) * 180)',
       }, [
         {at: -1, expect: '20'},
         {at: 0, expect: '100'},
diff --git a/tests/wpt/tests/css/css-color/parsing/color-computed-relative-color.html b/tests/wpt/tests/css/css-color/parsing/color-computed-relative-color.html
index aa2e48723eb..b6e628e78a5 100644
--- a/tests/wpt/tests/css/css-color/parsing/color-computed-relative-color.html
+++ b/tests/wpt/tests/css/css-color/parsing/color-computed-relative-color.html
@@ -119,6 +119,8 @@
   fuzzy_test_computed_color(`rgb(from rgb(20% none 60%) r g b)`, `color(srgb 0.2 0 0.6)`);
   fuzzy_test_computed_color(`rgb(from rgb(20% 40% 60% / none) r g b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`rgb(from color-mix(in srgb, red, red) r g b / alpha)`, `color(srgb 1 0 0)`);
 
   // hsl(from ...)
 
@@ -192,6 +194,9 @@
   fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / none) h s l / alpha)`, `color(srgb 0.4 0.6 0.4 / 0)`);
   fuzzy_test_computed_color(`hsl(from hsl(none 20% 50% / .5) h s l / alpha)`, `color(srgb 0.6 0.4 0.4 / 0.5)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`hsl(from color-mix(in srgb, red, red) h s l / alpha)`, `color(srgb 1 0 0)`);
+
   // hwb(from ...)
 
   // Testing no modifications.
@@ -263,6 +268,9 @@
   fuzzy_test_computed_color(`hwb(from hwb(120deg 20% 50% / none) h w b / alpha)`, `color(srgb 0.2 0.5 0.2 / 0)`);
   fuzzy_test_computed_color(`hwb(from hwb(none 20% 50% / .5) h w b / alpha)`, `color(srgb 0.5 0.2 0.2 / 0.5)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`hwb(from color-mix(in srgb, red, red) h w b / alpha)`, `color(srgb 1 0 0)`);
+
   // lab()
 
   // Testing no modifications.
@@ -327,6 +335,9 @@
   fuzzy_test_computed_color(`lab(from lab(25 none 50) l a b)`, `lab(25 0 50)`);
   fuzzy_test_computed_color(`lab(from lab(25 20 50 / none) l a b / alpha)`, `lab(25 20 50 / 0)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)`, `lab(25 20 50)`);
+
   // oklab()
 
   // Testing no modifications.
@@ -391,6 +402,9 @@
   fuzzy_test_computed_color(`oklab(from oklab(0.25 none 0.5) l a b)`, `oklab(0.25 0 0.5)`);
   fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / none) l a b / alpha)`, `oklab(0.25 0.2 0.5 / 0)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)`, `oklab(0.25 0.2 0.5)`);
+
   // lch()
 
   // Testing no modifications.
@@ -463,6 +477,9 @@
   fuzzy_test_computed_color(`lch(from lch(0.7 none 30) l c h)`,                                          `lch(0.7 0 30)`);
   fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / none) l c h / alpha)`,                             `lch(0.7 45 30 / 0)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)`, `lch(70 45 30)`);
+
   // oklch()
 
   // Testing no modifications.
@@ -536,6 +553,9 @@
   fuzzy_test_computed_color(`oklch(from oklch(0.7 none 30) l c h)`,                                          `oklch(0.7 0 30)`);
   fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / none) l c h / alpha)`,                             `oklch(0.7 0.45 30 / 0)`);
 
+  // color-mix
+  fuzzy_test_computed_color(`oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)`, `oklch(0.7 0.45 30)`);
+
   for (const colorSpace of [ "srgb", "srgb-linear", "a98-rgb", "rec2020", "prophoto-rgb", "display-p3" ]) {
       // Testing no modifications.
       fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b)`,                              `color(${colorSpace} 0.7 0.5 0.3)`);
@@ -622,6 +642,9 @@
       fuzzy_test_computed_color(`color(from color(${colorSpace} none none none / none) ${colorSpace} r g b / alpha)`,            `color(${colorSpace} 0 0 0 / 0)`);
       fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 none 0.3) ${colorSpace} r g b)`,                             `color(${colorSpace} 0.7 0 0.3)`);
       fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / none) ${colorSpace} r g b / alpha)`,               `color(${colorSpace} 0.7 0.5 0.3 / 0)`);
+
+      // color-mix
+      fuzzy_test_computed_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3)`);
   }
 
   for (const colorSpace of [ "xyz", "xyz-d50", "xyz-d65" ]) {
@@ -683,6 +706,9 @@
       fuzzy_test_computed_color(`color(from color(${colorSpace} none none none / none) ${colorSpace} x y z / alpha)`,            `color(${resultColorSpace} 0 0 0 / 0)`);
       fuzzy_test_computed_color(`color(from color(${colorSpace} 7 none 100) ${colorSpace} x y z)`,                               `color(${resultColorSpace} 7 0 100)`);
       fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / none) ${colorSpace} x y z / alpha)`,               `color(${resultColorSpace} 7 -20.5 100 / 0)`);
+
+      // color-mix
+      fuzzy_test_computed_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} r g b / alpha)`, `color(${resultColorSpace} 0.7 0.5 0.3)`);
   }
 
   // Test origin colors with different color spaces, going both to and from srgb.
diff --git a/tests/wpt/tests/css/css-color/parsing/color-valid-relative-color.html b/tests/wpt/tests/css/css-color/parsing/color-valid-relative-color.html
index 543c2486c01..652c0c8fc45 100644
--- a/tests/wpt/tests/css/css-color/parsing/color-valid-relative-color.html
+++ b/tests/wpt/tests/css/css-color/parsing/color-valid-relative-color.html
@@ -120,6 +120,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`rgb(from currentColor r g b)`, `rgb(from currentColor r g b)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`rgb(from color-mix(in srgb, red, red) r g b / alpha)`, `color(srgb 1 0 0)`);
+
     // hsl(from ...)
 
     // Testing no modifications.
@@ -198,6 +201,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`hsl(from currentColor h s l)`, `hsl(from currentColor h s l)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`hsl(from color-mix(in srgb, red, red) h s l / alpha)`, `color(srgb 1 0 0)`);
+
     // hwb(from ...)
 
     // Testing no modifications.
@@ -271,6 +277,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`hwb(from currentColor h w b)`, `hwb(from currentColor h w b)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`hwb(from color-mix(in srgb, red, red) h w b / alpha)`, `color(srgb 1 0 0)`);
+
     // lab()
 
     // Testing no modifications.
@@ -339,6 +348,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`lab(from currentColor l a b)`, `lab(from currentColor l a b)`);
 
+  // color-mix
+    fuzzy_test_valid_color(`lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)`, `lab(25 20 50)`);
+
     // oklab()
 
     // Testing no modifications.
@@ -407,6 +419,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`oklab(from currentColor l a b)`, `oklab(from currentColor l a b)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)`, `oklab(0.25 0.2 0.5)`);
+
     // lch()
 
     // Testing no modifications.
@@ -484,6 +499,9 @@
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`lch(from currentColor) l c h)`, `lch(from currentColor) l c h)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)`, `lch(70 45 30)`);
+
     // oklch()
 
     // Testing no modifications.
@@ -559,6 +577,9 @@
     fuzzy_test_valid_color(`oklch(from oklch(0.7 none 30) l c h)`,                                          `oklch(0.7 0 30)`);
     fuzzy_test_valid_color(`oklch(from oklch(0.7 0.45 30 / none) l c h / alpha)`,                             `oklch(0.7 0.45 30 / 0)`);
 
+    // color-mix
+    fuzzy_test_valid_color(`oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)`, `oklch(0.7 0.45 30)`);
+
     // Testing with 'currentColor'
     fuzzy_test_valid_color(`oklch(from currentColor l c h)`, `oklch(from currentColor l c h)`);
 
@@ -651,6 +672,8 @@
         // Testing with 'currentColor'
         fuzzy_test_valid_color(`color(from currentColor ${colorSpace} r g b)`,                                                  `color(from currentColor ${colorSpace} r g b)`);
 
+        // color-mix
+        fuzzy_test_valid_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3)`);
     }
 
     for (const colorSpace of [ "xyz", "xyz-d50", "xyz-d65" ]) {
@@ -714,6 +737,9 @@
 
         // Testing with 'currentColor'
         fuzzy_test_valid_color(`color(from currentColor ${colorSpace} x y z)`,                                                  `color(from currentColor ${colorSpace} x y z)`);
+
+        // color-mix
+        fuzzy_test_valid_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} r g b / alpha)`, `color(${resultColorSpace} 0.7 0.5 0.3)`);
     }
 
     // Spec Examples: https://www.w3.org/TR/css-color-5/#relative-colors
diff --git a/tests/wpt/tests/css/css-contain/container-queries/custom-property-style-queries.html b/tests/wpt/tests/css/css-contain/container-queries/custom-property-style-queries.html
index 29b5004af06..4ae5efca911 100644
--- a/tests/wpt/tests/css/css-contain/container-queries/custom-property-style-queries.html
+++ b/tests/wpt/tests/css/css-contain/container-queries/custom-property-style-queries.html
@@ -415,7 +415,7 @@
       color: green;
     }
   }
-  @container style(--number: a b) {
+  @container style(--spaces: a b) {
     #original-text-spaces {
       color: red;
     }
diff --git a/tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html b/tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.html
similarity index 90%
rename from tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html
rename to tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.html
index d173fb03bbb..493b690f636 100644
--- a/tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.tentative.html
+++ b/tests/wpt/tests/css/css-fonts/font-size-adjust-interpolation-math-functions.html
@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <title>font-size-adjust interpolation with css math functions</title>
     <link rel="help" href="https://drafts.csswg.org/css-fonts-5/#font-size-adjust-prop">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
@@ -32,7 +33,7 @@
       test_interpolation({
         property: 'font-size-adjust',
         from: 'calc(sign(20rem - 20px) * 100)',
-        to: 'calc(progress(10rem from 20px to 100px) * 180)',
+        to: 'calc(sign(20rem - 20px) * 180)',
       }, [
         {at: -1, expect: '20'},
         {at: 0, expect: '100'},
diff --git a/tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html b/tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.html
similarity index 90%
rename from tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html
rename to tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.html
index 9029eefcb44..74c42587f5e 100644
--- a/tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.tentative.html
+++ b/tests/wpt/tests/css/css-fonts/font-stretch-interpolation-math-functions.html
@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <title>font-size-adjust interpolation with css math functions</title>
     <link rel="help" href="https://drafts.csswg.org/css-fonts-5/#font-size-adjust-prop">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
@@ -32,7 +33,7 @@
       test_interpolation({
         property: 'font-stretch',
         from: 'calc(sign(20rem - 20px) * 100%)',
-        to: 'calc(progress(10rem from 20px to 100px) * 180%)',
+        to: 'calc(sign(20rem - 20px) * 180%)',
       }, [
         {at: -1, expect: '20%'},
         {at: 0, expect: '100%'},
diff --git a/tests/wpt/tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html b/tests/wpt/tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html
index 3b38bd8f162..367ebfa8e0e 100644
--- a/tests/wpt/tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html
+++ b/tests/wpt/tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html
@@ -29,33 +29,33 @@ test(() => {
   tamperMapPrototype();
 
   const highlight = new Highlight(new StaticRange({startContainer: document.body, endContainer: document.body, startOffset: 0, endOffset: 0}));
-  const highlightRegister = new HighlightRegister();
+  const highlightRegistry = new HighlightRegistry();
 
-  assert_equals(highlightRegister.size, 0);
-  highlightRegister.set("foo", highlight);
-  assert_equals(highlightRegister.size, 1);
+  assert_equals(highlightRegistry.size, 0);
+  highlightRegistry.set("foo", highlight);
+  assert_equals(highlightRegistry.size, 1);
 
-  assert_true(highlightRegister.has("foo"));
-  assert_equals([...highlightRegister.entries()][0][0], "foo");
+  assert_true(highlightRegistry.has("foo"));
+  assert_equals([...highlightRegistry.entries()][0][0], "foo");
 
-  highlightRegister.clear();
-  assert_equals(highlightRegister.size, 0);
-  assert_equals(highlightRegister.get("foo"), undefined);
+  highlightRegistry.clear();
+  assert_equals(highlightRegistry.size, 0);
+  assert_equals(highlightRegistry.get("foo"), undefined);
 
-  highlightRegister.set("bar", highlight);
-  assert_equals(highlightRegister.get("bar"), highlight);
-  assert_equals([...highlightRegister][0][1], highlight);
+  highlightRegistry.set("bar", highlight);
+  assert_equals(highlightRegistry.get("bar"), highlight);
+  assert_equals([...highlightRegistry][0][1], highlight);
 
-  highlightRegister.delete("bar");
-  assert_equals(highlightRegister.size, 0);
-  assert_false(highlightRegister.has("bar"));
+  highlightRegistry.delete("bar");
+  assert_equals(highlightRegistry.size, 0);
+  assert_false(highlightRegistry.has("bar"));
 
-  highlightRegister.set("baz", highlight);
-  assert_equals([...highlightRegister.keys()][0], "baz");
-  assert_equals([...highlightRegister.values()][0], highlight);
+  highlightRegistry.set("baz", highlight);
+  assert_equals([...highlightRegistry.keys()][0], "baz");
+  assert_equals([...highlightRegistry.values()][0], highlight);
 
   let callbackCalled = false;
-  highlightRegister.forEach(() => { callbackCalled = true; });
+  highlightRegistry.forEach(() => { callbackCalled = true; });
   assert_true(callbackCalled);
 }, "HighlightRegistry is a maplike interface that works as expected even if Map.prototype is tampered.");
 </script>
diff --git a/tests/wpt/tests/css/css-highlight-api/historical.window.js b/tests/wpt/tests/css/css-highlight-api/historical.window.js
new file mode 100644
index 00000000000..9b735f855dc
--- /dev/null
+++ b/tests/wpt/tests/css/css-highlight-api/historical.window.js
@@ -0,0 +1,7 @@
+// https://drafts.csswg.org/css-highlight-api-1/
+
+"use strict";
+
+test(() => {
+  assert_equals(self.HighlightRegister, undefined);
+}, "HighlightRegister was renamed");
diff --git a/tests/wpt/tests/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html b/tests/wpt/tests/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html
new file mode 100644
index 00000000000..6d1e2a3bc93
--- /dev/null
+++ b/tests/wpt/tests/css/css-images/animation/image-slice-interpolation-math-functions-tentative.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>border-image-slice interpolation with css math functions</title>
+    <link rel="author" title="Daniil Sakhapov" href="mailto:sakhapov@chromium.org">
+    <link rel="help" href="https://drafts.csswg.org/css-backgrounds/#the-border-image-slice">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <style>
+    :root {
+      font-size: 10px;
+    }
+  </style>
+  <body>
+    <script>
+      test_interpolation({
+        property: 'border-image-slice',
+        from: '100',
+        to: 'calc(sign(20rem - 20px) * 180)',
+      }, [
+        {at: -1, expect: '20'},
+        {at: 0, expect: '100'},
+        {at: 0.125, expect: '110'},
+        {at: 0.875, expect: '170'},
+        {at: 1, expect: '180'},
+        {at: 2, expect: '260'}
+      ]);
+
+      test_interpolation({
+        property: 'border-image-slice',
+        from: '100%',
+        to: 'calc(sign(20rem - 20px) * 180%)',
+      }, [
+        {at: -1, expect: '20%'},
+        {at: 0, expect: '100%'},
+        {at: 0.125, expect: '110%'},
+        {at: 0.875, expect: '170%'},
+        {at: 1, expect: '180%'},
+        {at: 2, expect: '260%'}
+      ]);
+
+      test_interpolation({
+        property: 'border-image-slice',
+        from: 'calc(sign(20rem - 20px) * 100%)',
+        to: 'calc(progress(10rem from 20px to 100px) * 180%)',
+      }, [
+        {at: -1, expect: '20%'},
+        {at: 0, expect: '100%'},
+        {at: 0.125, expect: '110%'},
+        {at: 0.875, expect: '170%'},
+        {at: 1, expect: '180%'},
+        {at: 2, expect: '260%'}
+      ]);
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/tests/css/css-masking/clip-path/animations/clip-path-interpolation-discrete.html b/tests/wpt/tests/css/css-masking/clip-path/animations/clip-path-interpolation-discrete.html
new file mode 100644
index 00000000000..9c143720067
--- /dev/null
+++ b/tests/wpt/tests/css/css-masking/clip-path/animations/clip-path-interpolation-discrete.html
@@ -0,0 +1,124 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>clip-path interpolation with allow-discrete</title>
+    <link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-clip-path">
+    <meta name="assert" content="clip-path supports animation with allow-discrete.">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <style>
+    .parent {
+      clip-path: circle(farthest-side);
+    }
+    .target {
+      clip-path: circle(10px);
+    }
+  </style>
+  <body>
+    <script>
+      'use strict';
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'circle(10px)',
+        to: 'inset(20px)',
+      }, [
+        {at: -1, expect: 'circle(10px)'},
+        {at: 0, expect: 'circle(10px)'},
+        {at: 0.4, expect: 'circle(10px)'},
+        {at: 0.5, expect: 'inset(20px)'},
+        {at: 1, expect: 'inset(20px)'},
+        {at: 1.5, expect: 'inset(20px)'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'ellipse()',
+        to: 'padding-box',
+      }, [
+        {at: -1, expect: 'ellipse()'},
+        {at: 0, expect: 'ellipse()'},
+        {at: 0.4, expect: 'ellipse()'},
+        {at: 0.5, expect: 'padding-box'},
+        {at: 1, expect: 'padding-box'},
+        {at: 1.5, expect: 'padding-box'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: neutralKeyframe,
+        to: 'none',
+      }, [
+        {at: -1, expect: 'circle(10px)'},
+        {at: 0, expect: 'circle(10px)'},
+        {at: 0.4, expect: 'circle(10px)'},
+        {at: 0.5, expect: 'none'},
+        {at: 1, expect: 'none'},
+        {at: 1.5, expect: 'none'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'initial',
+        to: 'circle()',
+      }, [
+        {at: -1, expect: 'none'},
+        {at: 0, expect: 'none'},
+        {at: 0.4, expect: 'none'},
+        {at: 0.5, expect: 'circle()'},
+        {at: 1, expect: 'circle()'},
+        {at: 1.5, expect: 'circle()'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'inherit',
+        to: 'circle()',
+      }, [
+        {at: -0.1, expect: 'circle(farthest-side)'},
+        {at: 0, expect: 'circle(farthest-side)'},
+        {at: 0.4, expect: 'circle(farthest-side)'},
+        {at: 0.5, expect: 'circle()'},
+        {at: 1, expect: 'circle()'},
+        {at: 1.5, expect: 'circle()'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'unset',
+        to: 'inset(10%)',
+      }, [
+        {at: -0.1, expect: 'none'},
+        {at: 0, expect: 'none'},
+        {at: 0.4, expect: 'none'},
+        {at: 0.5, expect: 'inset(10%)'},
+        {at: 1, expect: 'inset(10%)'},
+        {at: 1.5, expect: 'inset(10%)'},
+      ]);
+
+      test_interpolation({
+        property: 'clip-path',
+        behavior: 'allow-discrete',
+        from: 'stroke-box',
+        to: 'url("abc")',
+      }, [
+        {at: -0.1, expect: 'stroke-box'},
+        {at: 0, expect: 'stroke-box'},
+        {at: 0.4, expect: 'stroke-box'},
+        {at: 0.5, expect: 'url("abc")'},
+        {at: 1, expect: 'url("abc")'},
+        {at: 1.5, expect: 'url("abc")'},
+      ]);
+
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/tests/css/css-multicol/crashtests/multicol-with-oof-in-multicol-with-oof-in-multicol.html b/tests/wpt/tests/css/css-multicol/crashtests/multicol-with-oof-in-multicol-with-oof-in-multicol.html
new file mode 100644
index 00000000000..b1104e28dde
--- /dev/null
+++ b/tests/wpt/tests/css/css-multicol/crashtests/multicol-with-oof-in-multicol-with-oof-in-multicol.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://issues.chromium.org/issues/41486207">
+<div style="columns:2; column-fill:auto; height:100px;">
+  <div style="columns:1; column-fill:auto; height:100px;">
+    <div style="position:relative;">
+      <div id="outer" style="position:absolute;"></div>
+    </div>
+    <div style="columns:1; column-fill:auto; height:100px; position:relative;">
+      <div style="position:relative;">
+        <div id="inner" style="position:absolute;"></div>
+      </div>
+    </div>
+  </div>
+</div>
diff --git a/tests/wpt/tests/css/css-position/animations/position-interpolation.html b/tests/wpt/tests/css/css-position/animations/position-interpolation.html
index a4ad50240a4..1a9e7f055b8 100644
--- a/tests/wpt/tests/css/css-position/animations/position-interpolation.html
+++ b/tests/wpt/tests/css/css-position/animations/position-interpolation.html
@@ -36,12 +36,41 @@
 </body>
 
 <script>
+// Use default transition-behavior: normal.
 test_no_interpolation({
   property: 'position',
   from: 'absolute',
   to: 'static',
 });
 
+test_interpolation({
+  property: 'position',
+  behavior: 'allow-discrete',
+  from: 'relative',
+  to: 'static',
+}, [
+  {at: -1, expect: 'relative'},
+  {at: 0, expect: 'relative'},
+  {at: 0.4, expect: 'relative'},
+  {at: 0.5, expect: 'static'},
+  {at: 1, expect: 'static'},
+  {at: 1.5, expect: 'static'},
+]);
+
+test_interpolation({
+  property: 'position',
+  behavior: 'allow-discrete',
+  from: 'sticky',
+  to: 'fixed',
+}, [
+  {at: -1, expect: 'sticky'},
+  {at: 0, expect: 'sticky'},
+  {at: 0.4, expect: 'sticky'},
+  {at: 0.5, expect: 'fixed'},
+  {at: 1, expect: 'fixed'},
+  {at: 1.5, expect: 'fixed'},
+]);
+
 // This is still discrete interpolation; this test ensures that the neutral
 // keyframe is defined correctly for position.
 test_interpolation({
diff --git a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/positioned-target-iframe.html b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/positioned-target-iframe.html
new file mode 100644
index 00000000000..65195af621a
--- /dev/null
+++ b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/positioned-target-iframe.html
@@ -0,0 +1,73 @@
+<!DOCTYPE html>
+<html>
+<body>
+  <style>
+    .target {
+      width: 100px;
+      height: 100px;
+      background-color: green;
+      scroll-snap-align: start;
+    }
+    .placeholder {
+      background-color: purple;
+    }
+    .snapcontainer {
+      border:solid 1px black;
+      overflow: scroll;
+      scroll-snap-type: y mandatory;
+    }
+    .big {
+      height: 315px;
+      width: 600px;
+      position: relative;
+    }
+    .small {
+      height: 115px;
+      width: 120px;
+    }
+    .positioned {
+      position: absolute;
+    }
+    #target1, #target2, #target3, #target4, #target5 {
+      top: 400px;
+    }
+    #target1 {
+      left: 0px;
+    }
+    #target2 {
+      left: 110px;
+    }
+    #target3 {
+      left: 220px;
+    }
+    #target4 {
+      left: 330px;
+    }
+    #target5 {
+      left: 440px;
+    }
+    :target {
+      background-color: yellow;
+    }
+    .large-space {
+      position: absolute;
+      height: 300vh;
+      width: 300vw;
+    }
+  </style>
+  <div id="outer" class="big snapcontainer">
+    <div id="outerplaceholder1" class="placeholder target"></div>
+    <div id="outerplaceholder2" class="placeholder target"></div>
+    <div id="inner" class="small snapcontainer">
+      <div id="innerplaceholder1" class="placeholder target"></div>
+      <div id="innerplaceholder2" class="placeholder target"></div>
+      <div id="target1" class="positioned target"><h1>Box 1</h1></div>
+      <div id="target2" class="positioned target"><h1>Box 2</h1></div>
+      <div id="target3" class="positioned target"><h1>Box 3</h1></div>
+      <div id="target4" class="positioned target"><h1>Box 4</h1></div>
+      <div id="target5" class="positioned target"><h1>Box 5</h1></div>
+    </div>
+    <div class="large-space"></div>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-iframe.html b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-iframe.html
new file mode 100644
index 00000000000..35b0684b26f
--- /dev/null
+++ b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-iframe.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html>
+  <body>
+    <style>
+      .scroller {
+        overflow: scroll;
+        width: 350px;
+        height: 350px;
+        border: solid 1px black;
+        scroll-snap-type: y mandatory;
+        position: relative;
+        resize: both;
+      }
+      .large-space {
+        height: 300vh;
+        width: 300vw;
+        position: absolute;
+      }
+      .snap {
+        scroll-snap-align: start;
+      }
+      .box {
+        width: 100px;
+        height: 100px;
+        background-color: green;
+        display: inline-block;
+        position: relative;
+      }
+      .grid {
+        position: absolute;
+        width: 350px;
+        height: 350px;
+      }
+      .snap:target {
+        background-color: blue;
+      }
+    </style>
+    <div class="scroller" id="scroller">
+      <div class="large-space"></div>
+      <div class="grid" id="grid">
+        <div id="box1" class="snap box">Box 1</div>
+        <div id="box2" class="snap box">Box 2</div>
+        <div id="box3" class="snap box">Box 3</div>
+        <div id="box4" class="snap box">Box 4</div>
+        <div id="box5" class="snap box">Box 5</div>
+        <div id="box6" class="snap box">Box 6</div>
+        <div id="box7" class="snap box">Box 7</div>
+        <div id="box8" class="snap box">Box 8</div>
+        <div id="box9" class="snap box">Box 9</div>
+      </div>
+    </div>
+  </body>
+</html>
diff --git a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-positioned.html b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-positioned.html
new file mode 100644
index 00000000000..22727d19ebd
--- /dev/null
+++ b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element-positioned.html
@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <link rel="help" href="https://drafts.csswg.org/css-scroll-snap"/>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/dom/events/scrolling/scroll_support.js"></script>
+    <script src="/resources/testdriver.js"></script>
+    <script src="/resources/testdriver-actions.js"></script>
+    <script src="/resources/testdriver-vendor.js"></script>
+    <script src="resources/common.js"></script>
+  </head>
+<body>
+  <style>
+    .iframe {
+      height: 1000px;
+      width: 1000px;
+    }
+  </style>
+  <script>
+    window.onload = async () => {
+      await waitForCompositorCommit();
+      async function test(target_number) {
+        return promise_test(async (t) => {
+          let finish = null;
+          const finished = new Promise((res) => { finish = res; });
+          var iframe = document.createElement("iframe");
+          iframe.classList.add("iframe");
+          iframe.onload = async () => {
+            let boxes =
+              iframe.contentDocument.getElementsByClassName("positioned");
+            const box = (i) => {
+              return boxes[i - 1];
+            }
+            let scroller = iframe.contentDocument.getElementById("outer");
+            // There are 5 aligned boxes in positioned-target-iframe.html.
+            assert_equals(boxes.length, 5);
+            await runScrollSnapSelectionVerificationTest(t, scroller,
+              [box(1), box(2), box(3), box(4), box(5)],
+              box(target_number), "y");
+
+            // Let scroller no longer be a scroll container.
+            scroller.style.overflow = "visible";
+            assert_equals(scroller.scrollTop, 0);
+
+            // Let scroller be a scroll container once again.
+            scroller.style.overflow = "scroll";
+
+            // Run the test again.
+            await runScrollSnapSelectionVerificationTest(t, scroller,
+              [box(1), box(2), box(3), box(4), box(5)],
+              box(target_number), "y");
+            finish();
+          };
+          iframe.src = `positioned-target-iframe.html#target${target_number}`;
+          document.body.appendChild(iframe);
+          await finished;
+          document.body.removeChild(iframe);
+        }, "");
+      }
+
+      await test(1);
+      await test(2);
+      await test(3);
+      await test(4);
+      await test(5);
+    }
+  </script>
+</body>
+</html>
diff --git a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element.html b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element.html
new file mode 100644
index 00000000000..87e7098fa35
--- /dev/null
+++ b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/prefer-targeted-element.html
@@ -0,0 +1,99 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <link rel="help" href="https://drafts.csswg.org/css-scroll-snap"/>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/dom/events/scrolling/scroll_support.js"></script>
+  <script src="/resources/testdriver.js"></script>
+  <script src="/resources/testdriver-actions.js"></script>
+  <script src="/resources/testdriver-vendor.js"></script>
+  <script src="resources/common.js"></script>
+</head>
+
+<body>
+  <style>
+    .iframe {
+      width: 1000px;
+      height: 1000px;
+    }
+  </style>
+  <script>
+    window.onload = async () => {
+      await waitForCompositorCommit();
+      // This test sets up a 3x3 grid within scroller:
+      // -------------------------
+      // | Box 1 | Box 2 | Box 3 |
+      // ------------------------
+      // | Box 4 | Box 5 | Box 6 |
+      // -------------------------
+      // | Box 7 | Box 8 | Box 9 |
+      // -------------------------
+      // within an iframe.
+      // This function just gets the numbers beside |box_number| on each row.
+      // E.g. 4: 4%3 = 1; so the nmubers we want are 5 (4+1) and 6 (4+2).
+      function getAlignedNumbers(n) {
+        const mod_3 = n % 3;
+        if (mod_3 == 1) {
+          return [n + 1, n + 2];
+        } else if (mod_3 == 2) {
+          return [n - 1, n + 1];
+        }
+        return [n - 1, n - 2];
+      }
+
+      async function test(box_number) {
+        return promise_test(async (t) => {
+          let [other_box_1, other_box_2] = getAlignedNumbers(box_number);
+          let finish = null;
+          const finished = new Promise((res) => {
+            finish = res;
+          });
+          var iframe = document.createElement("iframe");
+          iframe.classList.add("iframe");
+          iframe.onload = async () => {
+            let boxes = iframe.contentDocument.getElementsByClassName("box");
+            const box = (i) => {
+              return boxes[i - 1];
+            }
+            let scroller = iframe.contentDocument.getElementById("scroller");
+            assert_equals(boxes.length, 9);
+            await runScrollSnapSelectionVerificationTest(t, scroller,
+              [box(box_number), box(other_box_1), box(other_box_2)],
+              box(box_number), "y");
+
+            // Let scroller no longer be a scroll container.
+            scroller.style.overflow = "visible";
+            assert_equals(scroller.scrollTop, 0);
+
+            // Let scroller be a scroll container once again.
+            scroller.style.overflow = "scroll";
+
+            // Run the test again.
+            await runScrollSnapSelectionVerificationTest(t, scroller,
+              [box(box_number), box(other_box_1), box(other_box_2)],
+              box(box_number), "y");
+
+            finish();
+          };
+          iframe.src = `prefer-targeted-element-iframe.html#box${box_number}`;
+          document.body.appendChild(iframe);
+          await finished;
+          document.body.removeChild(iframe);
+        }, `scroller selects targeted area box${box_number} among multiple` +
+           ` aligned areas.`);
+      }
+
+      await test(1);
+      await test(2);
+      await test(3);
+      await test(4);
+      await test(5);
+      await test(6);
+      await test(7);
+      await test(8);
+      await test(9);
+    }
+  </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/resources/common.js b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/resources/common.js
index 6ceec9118c5..26ee5f75eab 100644
--- a/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/resources/common.js
+++ b/tests/wpt/tests/css/css-scroll-snap/snap-after-relayout/multiple-aligned-targets/resources/common.js
@@ -34,13 +34,16 @@ async function scrollToAlignedElementsInAxis(scroller, elements, axis) {
   }
   assert_not_equals(target_offset_x || target_offset_y, null);
 
-  const scrollend_promise = waitForScrollendEventNoTimeout(scroller);
-  await new test_driver.Actions().scroll(0, 0,
-    (target_offset_x || 0) - scroller.scrollLeft,
-    (target_offset_y || 0) - scroller.scrollTop,
-    { origin: scroller })
-    .send();
-  await scrollend_promise;
+  if ((target_offset_x != null && scroller.scrollLeft != target_offset_x) ||
+      (target_offset_y != null && scroller.scrollTop != target_offset_y)) {
+    const scrollend_promise = waitForScrollendEventNoTimeout(scroller);
+    await new test_driver.Actions().scroll(0, 0,
+      (target_offset_x || scroller.scrollLeft) - scroller.scrollLeft,
+      (target_offset_y || scroller.scrollTop) - scroller.scrollTop,
+      { origin: scroller })
+      .send();
+    await scrollend_promise;
+  }
   if (axis == "y") {
     assert_equals(scroller.scrollTop, target_offset_y, "vertical scroll done");
   } else {
@@ -89,13 +92,12 @@ async function runScrollSnapSelectionVerificationTest(t, scroller, aligned_eleme
   const initial_scroll_left = scroller.scrollLeft;
   const initial_scroll_top = scroller.scrollTop;
   await scrollToAlignedElementsInAxis(scroller, aligned_elements, axis);
-  verifySelectedSnapTarget(scroller, expected_target, axis);
-  // Restore initial scroll offsets.
-  const scrollend_promise = new Promise((resolve) => {
-    scroller.addEventListener("scrollend", resolve);
+  // Wrapping this in t.step prevents timeouts in the event of a failure.
+  t.step(async () => {
+    verifySelectedSnapTarget(scroller, expected_target, axis);
   });
-  scroller.scrollTo(initial_scroll_left, initial_scroll_top);
-  await scrollend_promise;
+  // Restore initial scroll offsets.
+  await waitForScrollReset(t, scroller, initial_scroll_left, initial_scroll_top);
 }
 
 // This is a utility function for tests verifying that a layout shift does not
diff --git a/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8-ref.html b/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8-ref.html
new file mode 100644
index 00000000000..badc9938524
--- /dev/null
+++ b/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8-ref.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<style>
+  :root {
+    scrollbar-color: blue green;
+  }
+  body {
+    display: flex;
+    flex-wrap: wrap;
+    width: 200vw;
+    height: 200vh;
+  }
+</style>
diff --git a/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8.tentative.html b/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8.tentative.html
new file mode 100644
index 00000000000..4926fadaca1
--- /dev/null
+++ b/tests/wpt/tests/css/css-scrollbars/scrollbar-color-dynamic-8.tentative.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<html class="reftest-wait">
+<title>Dynamically set scrollbar-colors when starts ::-webkit-scrollbar and ensure scrollbars update</title>
+<link rel="author" title="Luke Warlow" href="mailto:lwarlow@igalia.com" />
+<link rel="help" href="https://drafts.csswg.org/css-scrollbars" />
+<link rel="match" href="scrollbar-color-dynamic-8-ref.html" />
+<script src="/common/reftest-wait.js"></script>
+<style>
+  :root::-webkit-scrollbar {
+    background: pink;
+  }
+  :root::-webkit-scrollbar-thumb {
+    background: orange;
+  }
+
+  body {
+    display: flex;
+    flex-wrap: wrap;
+    width: 200vw;
+    height: 200vh;
+  }
+</style>
+<script>
+  requestAnimationFrame(() => requestAnimationFrame(() => {
+    document.documentElement.style.scrollbarColor = 'blue green';
+
+    takeScreenshot();
+  }));
+</script>
diff --git a/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-001.html b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-001.html
new file mode 100644
index 00000000000..b57d4a2bad9
--- /dev/null
+++ b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-001.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1880550">
+<link rel="help" href="https://drafts.csswg.org/css-tables/#height-distribution">
+<link rel="match" href="table-cell-overflow-explicit-height-ref.html">
+<style>
+td {
+  height: 20px;
+  border: 2px solid cyan;
+  overflow: hidden;
+}
+.tall {
+  height: 300px;
+  background: blue;
+  border: 2px solid black;
+}
+</style>
+<table border>
+  <td>
+    <div class="tall"></div>
+    Can you see this text?
+  </td>
+</table>
diff --git a/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-002.html b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-002.html
new file mode 100644
index 00000000000..de65f625d68
--- /dev/null
+++ b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-002.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1880550">
+<link rel="help" href="https://drafts.csswg.org/css-tables/#height-distribution">
+<link rel="match" href="table-cell-overflow-explicit-height-ref.html">
+<style>
+td {
+  height: 20px;
+  max-height: 20px;
+  border: 2px solid cyan;
+  overflow: hidden;
+}
+.tall {
+  height: 300px;
+  background: blue;
+  border: 2px solid black;
+}
+</style>
+<table border>
+  <td>
+    <div class="tall"></div>
+    Can you see this text?
+  </td>
+</table>
diff --git a/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-ref.html b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-ref.html
new file mode 100644
index 00000000000..cb64b1f6ce3
--- /dev/null
+++ b/tests/wpt/tests/css/css-tables/table-cell-overflow-explicit-height-ref.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<style>
+td {
+  border: 2px solid cyan;
+}
+.tall {
+  height: 300px;
+  background: blue;
+  border: 2px solid black;
+}
+</style>
+<table border>
+  <td>
+    <div class="tall"></div>
+    Can you see this text?
+  </td>
+</table>
diff --git a/tests/wpt/tests/css/css-transitions/all-with-discrete.tentative.html b/tests/wpt/tests/css/css-transitions/all-with-discrete.tentative.html
deleted file mode 100644
index 37946717b4c..00000000000
--- a/tests/wpt/tests/css/css-transitions/all-with-discrete.tentative.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<link rel=author href="mailto:jarhar@chromium.org">
-<link rel=help href="https://github.com/w3c/csswg-drafts/issues/4441">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/css/css-animations/support/testcommon.js"></script>
-
-<div class=testcase id=discrete>Allow discrete</div>
-<div class=testcase id=normal>No discrete</div>
-
-<style>
-.testcase {
-  float: left;
-  width: 100px;
-  height: 100px;
-  transition: all 1s;
-}
-#discrete {
-  transition-behavior: allow-discrete;
-}
-.animated {
-  float: right;
-}
-</style>
-
-<script>
-promise_test(async () => {
-  await waitForAnimationFrames(2);
-  // Regression test for https://crbug.com/1518561
-  normal.classList.add('animated');
-  const normalAnims = normal.getAnimations();
-  assert_equals(normalAnims.length, 0,
-                "Started a discrete property transition on a normal element");
-
-  discrete.classList.add('animated');
-  const anims = discrete.getAnimations();
-  assert_equals(anims.length, 1,
-                "Did not start a discrete-property transition");
-  assert_equals(anims[0].transitionProperty, 'float');
-}, 'transition:all with transition-behavior:allow-discrete should animate discrete properties.');
-</script>
diff --git a/tests/wpt/tests/css/css-transitions/transition-behaivor.html b/tests/wpt/tests/css/css-transitions/transition-behaivor.html
new file mode 100644
index 00000000000..fa24509a373
--- /dev/null
+++ b/tests/wpt/tests/css/css-transitions/transition-behaivor.html
@@ -0,0 +1,122 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel=help href="https://drafts.csswg.org/css-transitions-2/#transition-behavior-property">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/css-animations/support/testcommon.js"></script>
+
+<div class=testcase id=discrete>Allow discrete</div>
+<div class=testcase id=normal>No discrete</div>
+
+<style>
+.testcase {
+  float: left;
+  width: 100px;
+  height: 100px;
+  transition: all 1s;
+}
+#discrete {
+  transition-behavior: allow-discrete;
+}
+.animated {
+  float: right;
+}
+</style>
+
+<script>
+promise_test(async () => {
+  await waitForAnimationFrames(2);
+  // Regression test for https://crbug.com/1518561
+  normal.classList.add('animated');
+  const normalAnims = normal.getAnimations();
+  assert_equals(normalAnims.length, 0,
+                "Should not start a discrete property transition");
+
+  discrete.classList.add('animated');
+  const anims = discrete.getAnimations();
+  assert_equals(anims.length, 1,
+                "Should start a discrete property transition");
+  assert_equals(anims[0].transitionProperty, 'float');
+}, 'transition-behavior:allow-discrete should animate discrete properties.');
+
+promise_test(async t => {
+  const div = addDiv(t, {
+    style: 'transition: all 1s normal, float 1s allow-discrete; float: left',
+  });
+  getComputedStyle(div).float;
+
+  div.style.float = 'right';
+  const anims = div.getAnimations();
+  assert_equals(anims.length, 1,
+                "Should start a discrete property transition");
+}, 'transition-behavior:allow-discrete overlaps the previous normal value.');
+
+promise_test(async t => {
+  const div = addDiv(t, {
+    style: 'transition: all 1s allow-discrete, float 1s normal; float: left',
+  });
+  getComputedStyle(div).float;
+
+  div.style.float = 'right';
+  const anims = div.getAnimations();
+  assert_equals(anims.length, 0,
+                "Should not start a discrete property transition");
+}, 'transition-behavior:normal overlaps the previous allow-discrete value.');
+
+promise_test(async t => {
+  const div = addDiv(t, {
+    style: 'transition: position 1s allow-discrete; position: relative',
+  });
+  getComputedStyle(div).position;
+
+  div.style.position = 'static';
+  assert_equals(div.getAnimations().length, 1,
+                "Should start a discrete property transition");
+
+  div.style.transitionBehavior = "normal";
+  div.style.position = 'absolute';
+  assert_equals(getComputedStyle(div).position, "absolute");
+  assert_equals(div.getAnimations().length, 0,
+                "The running transition should be cancelled");
+}, 'transition-behavior changed to normal should stop the running discrete ' +
+   'transitions.');
+
+promise_test(async t => {
+  const div = addDiv(t, {
+    style: 'transition: clip-path 5s normal; clip-path: circle(50px)',
+  });
+  getComputedStyle(div).transition;
+
+  div.style.clipPath = "circle(farthest-side)";
+  assert_equals(getComputedStyle(div).clipPath, "circle(farthest-side)");
+  assert_equals(div.getAnimations().length, 0,
+                "Should not start a transition of discrete animation values");
+
+  div.style.transitionBehavior = "allow-discrete";
+  div.style.clipPath = "circle(200px)";
+  assert_equals(getComputedStyle(div).clipPath, "circle(farthest-side)");
+  assert_equals(div.getAnimations().length, 1,
+                "Should start a transition for discrete animation values");
+}, 'transition-behavior:allow-discrete should animate for values fallback to ' +
+   'discrete animations.');
+
+promise_test(async t => {
+  const div = addDiv(t, {
+    style: 'transition: clip-path 5s allow-discrete; clip-path: circle(50px)',
+  });
+  getComputedStyle(div).transition;
+
+  div.style.clipPath = "circle(farthest-side)";
+  assert_equals(getComputedStyle(div).clipPath, "circle(50px)");
+  assert_equals(div.getAnimations().length, 1,
+                "Should start a transition for discrete animation values");
+
+  div.style.transitionBehavior = "normal";
+  div.style.clipPath = "ellipse()";
+  assert_equals(getComputedStyle(div).clipPath, "ellipse()");
+  assert_equals(div.getAnimations().length, 0,
+                "The running transition should be cancelled");
+}, 'transition-behavior:normal should cancel the running transitions whose ' +
+   'animation values are not interpolatable');
+
+</script>
diff --git a/tests/wpt/tests/css/css-ui/inheritance.html b/tests/wpt/tests/css/css-ui/inheritance.html
index 1eaa901aa0a..9a2efdd049e 100644
--- a/tests/wpt/tests/css/css-ui/inheritance.html
+++ b/tests/wpt/tests/css/css-ui/inheritance.html
@@ -37,9 +37,6 @@ assert_not_inherited('appearance', 'none', 'auto');
 assert_inherited('caret-color', currentColor, 'rgba(42, 53, 64, 0.75)');
 assert_inherited('caret-shape', 'auto', 'bar');
 assert_inherited('cursor', 'auto', 'pointer');
-if (CSS.supports('user-find', 'auto')) {
-  assert_inherited('user-find', 'auto', 'none');
-}
 assert_not_inherited('nav-down', 'auto', '#foo');
 assert_not_inherited('nav-left', 'auto', '#foo');
 assert_not_inherited('nav-right', 'auto', '#foo');
diff --git a/tests/wpt/tests/css/css-ui/parsing/user-find-computed.tentative.html b/tests/wpt/tests/css/css-ui/parsing/user-find-computed.tentative.html
deleted file mode 100644
index 91c0d3f7397..00000000000
--- a/tests/wpt/tests/css/css-ui/parsing/user-find-computed.tentative.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-<meta charset="utf-8">
-<title>CSS UI Level 4: getComputedStyle().userFind</title>
-<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/3460">
-<meta name="assert" content="user-find computed value is as specified.">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/css/support/computed-testcommon.js"></script>
-</head>
-<body>
-<div id="target"></div>
-<script>
-test_computed_value("user-find", "auto");
-test_computed_value("user-find", "none");
-</script>
-</body>
-</html>
diff --git a/tests/wpt/tests/css/css-ui/parsing/user-find-invalid.tentative.html b/tests/wpt/tests/css/css-ui/parsing/user-find-invalid.tentative.html
deleted file mode 100644
index 1d85f284956..00000000000
--- a/tests/wpt/tests/css/css-ui/parsing/user-find-invalid.tentative.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-<meta charset="utf-8">
-<title>CSS UI Level 4: parsing user-find with invalid values</title>
-<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/3460">
-<meta name="assert" content="user-find supports only the grammar 'auto | none'.">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/css/support/parsing-testcommon.js"></script>
-</head>
-<body>
-<script>
-test_invalid_value("user-find", "visible");
-test_invalid_value("user-find", "never");
-test_invalid_value("user-find", "10px");
-test_invalid_value("user-find", "'none'");
-</script>
-</body>
-</html>
diff --git a/tests/wpt/tests/css/css-ui/parsing/user-find-valid.tentative.html b/tests/wpt/tests/css/css-ui/parsing/user-find-valid.tentative.html
deleted file mode 100644
index ab963c296a6..00000000000
--- a/tests/wpt/tests/css/css-ui/parsing/user-find-valid.tentative.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-<meta charset="utf-8">
-<title>CSS UI Level 4: parsing user-find with valid values</title>
-<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/3460">
-<meta name="assert" content="user-find supports the grammar 'auto | none'.">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/css/support/parsing-testcommon.js"></script>
-</head>
-<body>
-<script>
-test_valid_value("user-find", "auto");
-test_valid_value("user-find", "none");
-</script>
-</body>
-</html>
diff --git a/tests/wpt/tests/css/css-variables/variables-animation-math-functions-tentative.html b/tests/wpt/tests/css/css-variables/variables-animation-math-functions.html
similarity index 79%
rename from tests/wpt/tests/css/css-variables/variables-animation-math-functions-tentative.html
rename to tests/wpt/tests/css/css-variables/variables-animation-math-functions.html
index 7c33d6cfa36..13bcf5a14cc 100644
--- a/tests/wpt/tests/css/css-variables/variables-animation-math-functions-tentative.html
+++ b/tests/wpt/tests/css/css-variables/variables-animation-math-functions.html
@@ -2,10 +2,9 @@
 <html>
   <head>
     <meta charset="utf-8">
-    <title>angle custom properties interpolation with progress-*() functions</title>
+    <title>angle custom properties interpolation with css math functions</title>
     <link rel="author" title="Daniil Sakhapov" href="mailto:sakhapov@chromium.org">
-    <link rel="help" href="https://drafts.csswg.org/css-values-5/#progress">
-    <meta name="assert" content="angle custom properties support interpolation with progress-*() functions.">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
@@ -38,7 +37,7 @@
       test_interpolation({
         property: '--my-angle',
         from: 'calc(sign(20rem - 20px) * 100deg)',
-        to: 'calc(progress(10rem from 20px to 100px) * 180deg)',
+        to: 'calc(sign(20rem - 20px) * 180deg)',
       }, [
         {at: -1, expect: '20deg'},
         {at: 0, expect: '100deg'},
diff --git a/tests/wpt/tests/css/css-view-transitions/pseudo-get-computed-style.html b/tests/wpt/tests/css/css-view-transitions/pseudo-get-computed-style.html
index 2481a713133..3e971885c39 100644
--- a/tests/wpt/tests/css/css-view-transitions/pseudo-get-computed-style.html
+++ b/tests/wpt/tests/css/css-view-transitions/pseudo-get-computed-style.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
-<title>View transitions: check pseudo element's display property</title>
-<link rel="help" href="https://github.com/WICG/view-transitions">
+<title>View transitions: check pseudo element's default styles</title>
+<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
 <link rel="author" href="mailto:vmpstr@chromium.org">
 
 <script src="/resources/testharness.js"></script>
@@ -30,34 +30,34 @@ promise_test(() => {
   assert_implements(document.startViewTransition, "Missing document.startViewTransition");
   return new Promise(async (resolve, reject) => {
     let transition = document.startViewTransition(() => {
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition").position, "fixed", ":view-transition");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute", "container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").mixBlendMode, "multiply", "container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").textOrientation, "upright", "container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").colorScheme, "dark light", "container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(target)").position, "absolute", "wrapper(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed", "::view-transition");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute", "container(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply", "container(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright", "container(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light", "container(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "absolute", "wrapper(target)");
 
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(target)").position, "absolute", "outgoing(target)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute", "outgoing(target)");
 
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").position, "absolute", "container(root)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").mixBlendMode, "normal", "container(root)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").position, "absolute", "wrapper(root)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").position, "absolute", "outgoing(root)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute", "container(root)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").mixBlendMode, "normal", "container(root)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute", "wrapper(root)");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute", "outgoing(root)");
 
       requestAnimationFrame(() => {
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition").position, "fixed", "raf :view-transition");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute", "raf container(target)");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").mixBlendMode, "multiply", "raf container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").textOrientation, "upright", "raf container(target)");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").colorScheme, "dark light", "raf container(target)");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(target)").position, "fixed", "raf wrapper(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed", "raf ::view-transition");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute", "raf container(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply", "raf container(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright", "raf container(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light", "raf container(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "fixed", "raf wrapper(target)");
 
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(target)").position, "absolute", "raf outgoing(target)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute", "raf outgoing(target)");
 
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").position, "absolute", "raf container(root)");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").mixBlendMode, "normal", "raf container(root)");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").position, "absolute", "raf wrapper(root)");
-        assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").position, "absolute", "raf outgoing(root)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute", "raf container(root)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").mixBlendMode, "normal", "raf container(root)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute", "raf wrapper(root)");
+        assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute", "raf outgoing(root)");
       });
     });
     await transition.finished;
@@ -69,42 +69,42 @@ promise_test(() => {
   assert_implements(document.startViewTransition, "Missing document.startViewTransition");
   return new Promise(async (resolve, reject) => {
     let transition = document.startViewTransition(() => {
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition").position, "fixed");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(target)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "absolute");
 
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(target)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute");
 
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").position, "absolute");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").position, "absolute");
-      assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute");
+      assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute");
 
       target.remove();
     });
 
     await transition.ready;
 
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition").position, "fixed");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").mixBlendMode, "multiply");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").textOrientation, "upright");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").colorScheme, "dark light");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(target)").position, "fixed");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "fixed");
 
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(target)").position, "absolute");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-new(target)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-new(target)").position, "absolute");
 
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").position, "absolute");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").position, "absolute");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").position, "absolute");
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-new(root)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-new(root)").position, "absolute");
 
-    assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute");
+    assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
 
     await transition.finished;
 
     // With custom ua sheets not applying to non-existing pseudo, the value should be the default (not absolute)
-    assert_not_equals(getComputedStyle(document.documentElement, ":view-transition-group(target)").position, "absolute");
+    assert_not_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
 
     resolve();
   });
diff --git a/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect-2.html b/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect-2.html
new file mode 100644
index 00000000000..8116bd0dcf2
--- /dev/null
+++ b/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect-2.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>backdrop-filter: Clip the filter at border box of element</title>
+<link rel="author" href="mailto:Hironori.Fujii@sony.com">
+<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
+<link rel="match"  href="reference/backdrop-filter-clip-rect-2-ref.html">
+<meta name="fuzzy" content="maxDifference=0-80; totalPixels=0-1000" />
+<style>
+.box {
+  display: inline-block;
+  box-sizing: border-box;
+  width: 100px;
+  height: 100px;
+  border-radius: 10px 20px 30px 40px;
+  border-width: 10px;
+}
+.no-bf > .box {
+  background: black;
+}
+.bf > .box {
+  border-color: transparent;
+  backdrop-filter: invert(1);
+}
+</style>
+<div>
+  <p>Expected: Same size rounded black boxes.</p>
+</div>
+
+<div class="no-bf">
+  <div class="box"></div>
+  <div class="box"></div>
+  <div class="box"></div>
+</div>
+<div class="bf">
+  <div class="box" style="border-style:none"></div>
+  <div class="box" style="border-style:solid"></div>
+  <div class="box" style="border-style:dotted"></div>
+</div>
diff --git a/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect.html b/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect.html
index 5d5c707116c..35b74652dce 100644
--- a/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect.html
+++ b/tests/wpt/tests/css/filter-effects/backdrop-filter-clip-rect.html
@@ -4,6 +4,7 @@
 <link rel="author" href="mailto:masonf@chromium.org">
 <link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
 <link rel="match"  href="backdrop-filter-clip-rect-ref.html">
+<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-1" />
 
 <div>
   <p>Expected: A green box, color-inverted inside the short, wide box with a<br>
diff --git a/tests/wpt/tests/css/filter-effects/reference/backdrop-filter-clip-rect-2-ref.html b/tests/wpt/tests/css/filter-effects/reference/backdrop-filter-clip-rect-2-ref.html
new file mode 100644
index 00000000000..f12e88515fe
--- /dev/null
+++ b/tests/wpt/tests/css/filter-effects/reference/backdrop-filter-clip-rect-2-ref.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel="author" href="mailto:Hironori.Fujii@sony.com">
+<style>
+.box {
+  display: inline-block;
+  box-sizing: border-box;
+  width: 100px;
+  height: 100px;
+  border-radius: 10px 20px 30px 40px;
+  border-width: 10px;
+}
+.no-bf > .box {
+  background: black;
+}
+</style>
+<div>
+  <p>Expected: Same size rounded black boxes.</p>
+</div>
+
+<div class="no-bf">
+  <div class="box"></div>
+  <div class="box"></div>
+  <div class="box"></div>
+</div>
+<div class="no-bf">
+  <div class="box"></div>
+  <div class="box"></div>
+  <div class="box"></div>
+</div>
diff --git a/tests/wpt/tests/css/motion/animation/offset-path-interpolation-007.html b/tests/wpt/tests/css/motion/animation/offset-path-interpolation-007.html
new file mode 100644
index 00000000000..6629f285d18
--- /dev/null
+++ b/tests/wpt/tests/css/motion/animation/offset-path-interpolation-007.html
@@ -0,0 +1,124 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>offset-path interpolation with allow-discrete</title>
+    <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-path-property">
+    <meta name="assert" content="offset-path supports animation with allow-discrete.">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <style>
+    .parent {
+      offset-path: circle(farthest-side);
+    }
+    .target {
+      offset-path: circle(10px);
+    }
+  </style>
+  <body>
+    <script>
+      'use strict';
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'circle(10px)',
+        to: 'inset(20px)',
+      }, [
+        {at: -1, expect: 'circle(10px)'},
+        {at: 0, expect: 'circle(10px)'},
+        {at: 0.4, expect: 'circle(10px)'},
+        {at: 0.5, expect: 'inset(20px)'},
+        {at: 1, expect: 'inset(20px)'},
+        {at: 1.5, expect: 'inset(20px)'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'ellipse(at center)',
+        to: 'none',
+      }, [
+        {at: -1, expect: 'ellipse(at center)'},
+        {at: 0, expect: 'ellipse(at center)'},
+        {at: 0.4, expect: 'ellipse(at center)'},
+        {at: 0.5, expect: 'none'},
+        {at: 1, expect: 'none'},
+        {at: 1.5, expect: 'none'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: neutralKeyframe,
+        to: 'none',
+      }, [
+        {at: -1, expect: 'circle(10px)'},
+        {at: 0, expect: 'circle(10px)'},
+        {at: 0.4, expect: 'circle(10px)'},
+        {at: 0.5, expect: 'none'},
+        {at: 1, expect: 'none'},
+        {at: 1.5, expect: 'none'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'initial',
+        to: 'circle()',
+      }, [
+        {at: -1, expect: 'none'},
+        {at: 0, expect: 'none'},
+        {at: 0.4, expect: 'none'},
+        {at: 0.5, expect: 'circle()'},
+        {at: 1, expect: 'circle()'},
+        {at: 1.5, expect: 'circle()'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'inherit',
+        to: 'circle()',
+      }, [
+        {at: -0.1, expect: 'circle(farthest-side)'},
+        {at: 0, expect: 'circle(farthest-side)'},
+        {at: 0.4, expect: 'circle(farthest-side)'},
+        {at: 0.5, expect: 'circle()'},
+        {at: 1, expect: 'circle()'},
+        {at: 1.5, expect: 'circle()'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'unset',
+        to: 'inset(10%)',
+      }, [
+        {at: -0.1, expect: 'none'},
+        {at: 0, expect: 'none'},
+        {at: 0.4, expect: 'none'},
+        {at: 0.5, expect: 'inset(10%)'},
+        {at: 1, expect: 'inset(10%)'},
+        {at: 1.5, expect: 'inset(10%)'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        behavior: 'allow-discrete',
+        from: 'ray(0deg)',
+        to: 'url("abc")',
+      }, [
+        {at: -0.1, expect: 'ray(0deg)'},
+        {at: 0, expect: 'ray(0deg)'},
+        {at: 0.4, expect: 'ray(0deg)'},
+        {at: 0.5, expect: 'url("abc")'},
+        {at: 1, expect: 'url("abc")'},
+        {at: 1.5, expect: 'url("abc")'},
+      ]);
+
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions-tentative.html b/tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions.html
similarity index 90%
rename from tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions-tentative.html
rename to tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions.html
index 34e0abf2b0d..c6be0a55d71 100644
--- a/tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions-tentative.html
+++ b/tests/wpt/tests/css/motion/animation/offset-rotate-interpolation-math-functions.html
@@ -5,7 +5,7 @@
     <title>offset-rotate interpolation with css math functions</title>
     <link rel="author" title="Daniil Sakhapov" href="mailto:sakhapov@chromium.org">
     <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-rotate-property">
-    <link rel="help" href="https://drafts.csswg.org/css-values-5/#progress">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
@@ -33,7 +33,7 @@
       test_interpolation({
         property: 'offset-rotate',
         from: 'calc(sign(20rem - 20px) * 100deg)',
-        to: 'calc(progress(10rem from 20px to 100px) * 180deg)',
+        to: 'calc(sign(20rem - 20px) * 180deg)',
       }, [
         {at: -1, expect: '20deg'},
         {at: 0, expect: '100deg'},
diff --git a/tests/wpt/tests/css/motion/animation/ray-angle-interpolation-math-functions.html b/tests/wpt/tests/css/motion/animation/ray-angle-interpolation-math-functions.html
new file mode 100644
index 00000000000..162adbc095e
--- /dev/null
+++ b/tests/wpt/tests/css/motion/animation/ray-angle-interpolation-math-functions.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>ray() angle interpolation with css math functions</title>
+    <link rel="author" title="Daniil Sakhapov" href="mailto:sakhapov@chromium.org">
+    <link rel="help" href="https://drafts.fxtf.org/motion/#offset-path-property">
+    <link rel="help" href="https://drafts.csswg.org/css-values/#sign-funcs">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <style>
+    :root {
+      font-size: 10px;
+    }
+  </style>
+  <body>
+    <script>
+      test_interpolation({
+        property: 'offset-path',
+        from: 'ray(100deg)',
+        to: 'ray(calc(sign(20rem - 20px) * 180deg))',
+      }, [
+        {at: -1, expect: 'ray(20deg)'},
+        {at: 0, expect: 'ray(100deg)'},
+        {at: 0.125, expect: 'ray(110deg)'},
+        {at: 0.875, expect: 'ray(170deg)'},
+        {at: 1, expect: 'ray(180deg)'},
+        {at: 2, expect: 'ray(260deg)'}
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        from: 'ray(calc(sign(20rem - 20px) * 100deg))',
+        to: 'ray(calc(sign(20rem - 20px) * 180deg))',
+      }, [
+        {at: -1, expect: 'ray(20deg)'},
+        {at: 0, expect: 'ray(100deg)'},
+        {at: 0.125, expect: 'ray(110deg)'},
+        {at: 0.875, expect: 'ray(170deg)'},
+        {at: 1, expect: 'ray(180deg)'},
+        {at: 2, expect: 'ray(260deg)'}
+      ]);
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/tests/css/support/interpolation-testcommon.js b/tests/wpt/tests/css/support/interpolation-testcommon.js
index 115067465fe..211018ca053 100644
--- a/tests/wpt/tests/css/support/interpolation-testcommon.js
+++ b/tests/wpt/tests/css/support/interpolation-testcommon.js
@@ -104,6 +104,59 @@
     },
   };
 
+  var cssTransitionsInterpolationAllowDiscrete = {
+    name: 'CSS Transitions with transition-behavior:allow-discrete',
+    isSupported: function() {return true;},
+    supportsProperty: function() {return true;},
+    supportsValue: function() {return true;},
+    setup: function(property, from, target) {
+      target.style.setProperty(property, isNeutralKeyframe(from) ? '' : from);
+    },
+    nonInterpolationExpectations: function(from, to) {
+      return expectFlip(from, to, 0.5);
+    },
+    notAnimatableExpectations: function(from, to, underlying) {
+      return expectFlip(from, to, -Infinity);
+    },
+    interpolate: function(property, from, to, at, target, behavior) {
+      // Force a style recalc on target to set the 'from' value.
+      getComputedStyle(target).getPropertyValue(property);
+      target.style.transitionDuration = '100s';
+      target.style.transitionDelay = '-50s';
+      target.style.transitionTimingFunction = createEasing(at);
+      target.style.transitionProperty = property;
+      target.style.transitionBehavior = 'allow-discrete';
+      target.style.setProperty(property, isNeutralKeyframe(to) ? '' : to);
+    },
+  };
+
+  var cssTransitionAllInterpolationAllowDiscrete = {
+    name: 'CSS Transitions with transition-property:all and transition-behavor:allow-discrete',
+    isSupported: function() {return true;},
+    // The 'all' value doesn't cover custom properties.
+    supportsProperty: function(property) {return property.indexOf('--') !== 0;},
+    supportsValue: function() {return true;},
+    setup: function(property, from, target) {
+      target.style.setProperty(property, isNeutralKeyframe(from) ? '' : from);
+    },
+    nonInterpolationExpectations: function(from, to) {
+      return expectFlip(from, to, 0.5);
+    },
+    notAnimatableExpectations: function(from, to, underlying) {
+      return expectFlip(from, to, -Infinity);
+    },
+    interpolate: function(property, from, to, at, target, behavior) {
+      // Force a style recalc on target to set the 'from' value.
+      getComputedStyle(target).getPropertyValue(property);
+      target.style.transitionDuration = '100s';
+      target.style.transitionDelay = '-50s';
+      target.style.transitionTimingFunction = createEasing(at);
+      target.style.transitionProperty = 'all';
+      target.style.transitionBehavior = 'allow-discrete';
+      target.style.setProperty(property, isNeutralKeyframe(to) ? '' : to);
+    },
+  };
+
   var webAnimationsInterpolation = {
     name: 'Web Animations',
     isSupported: function() {return 'animate' in Element.prototype;},
@@ -435,13 +488,19 @@
   function test_not_animatable(options) {
     test_interpolation(options, expectNotAnimatable);
   }
-  function create_tests() {
+  function create_tests(addAllowDiscreteTests) {
     var interpolationMethods = [
       cssTransitionsInterpolation,
       cssTransitionAllInterpolation,
       cssAnimationsInterpolation,
       webAnimationsInterpolation,
     ];
+    if (addAllowDiscreteTests) {
+      interpolationMethods = [
+        cssTransitionsInterpolationAllowDiscrete,
+        cssTransitionAllInterpolationAllowDiscrete,
+      ].concat(interpolationMethods);
+    }
     var container = createElement(document.body);
     var targets = createTestTargets(interpolationMethods, interpolationTests, compositionTests, container);
     // Separate interpolation and measurement into different phases to avoid O(n^2) of the number of targets.
@@ -456,7 +515,7 @@
 
   function test_interpolation(options, expectations) {
     interpolationTests.push({options, expectations});
-    create_tests();
+    create_tests(expectations === expectNoInterpolation || expectations === expectNotAnimatable);
     interpolationTests = [];
   }
   function test_composition(options, expectations) {
diff --git a/tests/wpt/tests/dom/events/scrolling/scroll_support.js b/tests/wpt/tests/dom/events/scrolling/scroll_support.js
index e86ead54564..c0c198f2366 100644
--- a/tests/wpt/tests/dom/events/scrolling/scroll_support.js
+++ b/tests/wpt/tests/dom/events/scrolling/scroll_support.js
@@ -26,17 +26,16 @@ async function waitForPointercancelEvent(test, target, timeoutMs = 500) {
 
 // Resets the scroll position to (0,0).  If a scroll is required, then the
 // promise is not resolved until the scrollend event is received.
-async function waitForScrollReset(test, scroller, timeoutMs = 500) {
+async function waitForScrollReset(test, scroller, x = 0, y = 0) {
   return new Promise(resolve => {
-    if (scroller.scrollTop == 0 &&
-        scroller.scrollLeft == 0) {
+    if (scroller.scrollTop == x && scroller.scrollLeft == y) {
       resolve();
     } else {
       const eventTarget =
         scroller == document.scrollingElement ? document : scroller;
-      scroller.scrollTop = 0;
-      scroller.scrollLeft = 0;
-      waitForScrollendEvent(test, eventTarget, timeoutMs).then(resolve);
+      scroller.scrollTop = y;
+      scroller.scrollLeft = x;
+      waitForScrollendEventNoTimeout(eventTarget).then(resolve);
     }
   });
 }
diff --git a/tests/wpt/tests/dom/nodes/Document-createEvent.js b/tests/wpt/tests/dom/nodes/Document-createEvent.js
index 57e8e966f83..0df5d3f6e1f 100644
--- a/tests/wpt/tests/dom/nodes/Document-createEvent.js
+++ b/tests/wpt/tests/dom/nodes/Document-createEvent.js
@@ -16,7 +16,7 @@ var aliases = {
   "MouseEvents": "MouseEvent",
   "StorageEvent": "StorageEvent",
   "SVGEvents": "Event",
-  "TextEvent": "CompositionEvent",
+  "TextEvent": "TextEvent",
   "UIEvent": "UIEvent",
   "UIEvents": "UIEvent",
 };
diff --git a/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js b/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js
new file mode 100644
index 00000000000..a10610f4677
--- /dev/null
+++ b/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-iframe.window.js
@@ -0,0 +1,147 @@
+// These tests ensure that:
+//   1. The HTML element insertion steps for iframes [1] run *after* all DOM
+//      insertion mutations associated with any given call to
+//      #concept-node-insert [2] (which may insert many elements at once).
+//      Consequently, a preceding element's insertion steps can observe the
+//      side-effects of later elements being connected to the DOM, but cannot
+//      observe the side-effects of the later element's own insertion steps [1],
+//      since insertion steps are run in order after all DOM insertion mutations
+//      are complete.
+//   2. The HTML element removing steps for iframes [3] *do not* synchronously
+//      run script during child navigable destruction. Therefore, script cannot
+//      observe the state of the DOM in the middle of iframe removal, even when
+//      multiple iframes are being removed in the same task. Iframe removal,
+//      from the perspective of the parent's DOM tree, is atomic.
+//
+// [1]: https://html.spec.whatwg.org/C#the-iframe-element:html-element-insertion-steps
+// [2]: https://dom.spec.whatwg.org/#concept-node-insert
+// [3]: https://html.spec.whatwg.org/C#the-iframe-element:html-element-removing-steps
+
+promise_test(async t => {
+  const fragment = new DocumentFragment();
+
+  const iframe1 = fragment.appendChild(document.createElement('iframe'));
+  const iframe2 = fragment.appendChild(document.createElement('iframe'));
+
+  t.add_cleanup(() => {
+    iframe1.remove();
+    iframe2.remove();
+  });
+
+  let iframe1Loaded = false, iframe2Loaded = false;
+  iframe1.onload = e => {
+    // iframe1 assertions:
+    iframe1Loaded = true;
+    assert_equals(window.frames.length, 1,
+        "iframe1 load event can observe its own participation in the frame " +
+        "tree");
+    assert_equals(iframe1.contentWindow, window.frames[0]);
+
+    // iframe2 assertions:
+    assert_false(iframe2Loaded,
+        "iframe2's load event hasn't fired before iframe1's");
+    assert_true(iframe2.isConnected,
+        "iframe1 can observe that iframe2 is connected to the DOM...");
+    assert_equals(iframe2.contentWindow, null,
+        "... but iframe1 cannot observe iframe2's contentWindow because " +
+        "iframe2's insertion steps have not been run yet");
+  };
+
+  iframe2.onload = e => {
+    iframe2Loaded = true;
+    assert_equals(window.frames.length, 2,
+        "iframe2 load event can observe its own participation in the frame tree");
+    assert_equals(iframe1.contentWindow, window.frames[0]);
+    assert_equals(iframe2.contentWindow, window.frames[1]);
+  };
+
+  // Synchronously consecutively adds both `iframe1` and `iframe2` to the DOM,
+  // invoking their insertion steps (and thus firing each of their `load`
+  // events) in order. `iframe1` will be able to observe itself in the DOM but
+  // not `iframe2`, and `iframe2` will be able to observe both itself and
+  // `iframe1`.
+  document.body.append(fragment);
+  assert_true(iframe1Loaded, "iframe1 loaded");
+  assert_true(iframe2Loaded, "iframe2 loaded");
+}, "Insertion steps: load event fires synchronously *after* iframe DOM " +
+   "insertion, as part of the iframe element's insertion steps");
+
+// There are several versions of the removal variant, since there are several
+// ways to remove multiple elements "at once". For example:
+//   1. `node.innerHTML = ''` ultimately runs
+//      https://dom.spec.whatwg.org/#concept-node-replace-all which removes all
+//      of a node's children.
+//   2. `node.replaceChildren()` which follows roughly the same path above.
+//   3. `node.remove()` on a parent of many children will invoke not the DOM
+//      remove algorithm, but rather the "removing steps" hook [1], for each
+//      child.
+//
+// [1]: https://dom.spec.whatwg.org/#concept-node-remove-ext
+
+function runRemovalTest(removal_method) {
+  promise_test(async t => {
+    const div = document.createElement('div');
+
+    const iframe1 = div.appendChild(document.createElement('iframe'));
+    const iframe2 = div.appendChild(document.createElement('iframe'));
+    document.body.append(div);
+
+    // Now that both iframes have been inserted into the DOM, we'll set up a
+    // MutationObserver that we'll use to ensure that multiple synchronous
+    // mutations (removals) are only observed atomically at the end. Specifically,
+    // the observer's callback is not invoked synchronously for each removal.
+    let observerCallbackInvoked = false;
+    const removalObserver = new MutationObserver(mutations => {
+      assert_false(observerCallbackInvoked,
+          "MO callback is only invoked once, not multiple times, i.e., for " +
+          "each removal");
+      observerCallbackInvoked = true;
+      assert_equals(mutations.length, 1, "Exactly one MutationRecord is recorded");
+      assert_equals(mutations[0].removedNodes.length, 2);
+      assert_equals(window.frames.length, 0,
+          "No iframe Windows exist when the MO callback is run");
+      assert_equals(document.querySelector('iframe'), null,
+          "No iframe elements are connected to the DOM when the MO callback is " +
+          "run");
+    });
+
+    removalObserver.observe(div, {childList: true});
+    t.add_cleanup(() => removalObserver.disconnect());
+
+    let iframe1UnloadFired = false, iframe2UnloadFired = false;
+    iframe1.contentWindow.addEventListener('unload', e => iframe1UnloadFired = true);
+    iframe2.contentWindow.addEventListener('unload', e => iframe2UnloadFired = true);
+
+    // Each `removal_method` will trigger the synchronous removal of each of
+    // `div`'s (iframe) children. This will synchronously, consecutively
+    // invoke HTML's "destroy a child navigable" (per [1]), for each iframe.
+    //
+    // [1]: https://html.spec.whatwg.org/C#the-iframe-element:destroy-a-child-navigable
+
+    if (removal_method === 'replaceChildren') {
+      div.replaceChildren();
+    } else if (removal_method === 'remove') {
+      div.remove();
+    } else if (removal_method === 'innerHTML') {
+      div.innerHTML = '';
+    }
+
+    assert_false(iframe1UnloadFired, "iframe1 unload did not fire");
+    assert_false(iframe2UnloadFired, "iframe2 unload did not fire");
+
+    assert_false(observerCallbackInvoked,
+        "MO callback is not invoked synchronously after removals");
+
+    // Wait one microtask.
+    await Promise.resolve();
+
+    if (removal_method !== 'remove') {
+      assert_true(observerCallbackInvoked,
+          "MO callback is invoked asynchronously after removals");
+    }
+  }, `Removing steps (${removal_method}): script does not run synchronously during iframe destruction`);
+}
+
+runRemovalTest('innerHTML');
+runRemovalTest('replaceChildren');
+runRemovalTest('remove');
diff --git a/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js b/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js
new file mode 100644
index 00000000000..a1be3e1dd3e
--- /dev/null
+++ b/tests/wpt/tests/dom/nodes/insertion-removing-steps/insertion-removing-steps-script.window.js
@@ -0,0 +1,48 @@
+promise_test(async t => {
+  const fragmentWithTwoScripts = new DocumentFragment();
+  const script0 = document.createElement('script');
+  const script1 = fragmentWithTwoScripts.appendChild(document.createElement('script'));
+  const script2 = fragmentWithTwoScripts.appendChild(document.createElement('script'));
+
+  window.kBaselineNumberOfScripts = document.scripts.length;
+  assert_equals(document.scripts.length, kBaselineNumberOfScripts,
+      "The WPT infra starts out with exactly 3 scripts");
+
+  window.script0Executed = false;
+  script0.innerText = `
+    script0Executed = true;
+    assert_equals(document.scripts.length, kBaselineNumberOfScripts + 1,
+        'script0 can observe itself and no other scripts');
+  `;
+
+  window.script1Executed = false;
+  script1.innerText = `
+    script1Executed = true;
+    assert_equals(document.scripts.length, kBaselineNumberOfScripts + 2,
+        "script1 executes synchronously, and thus observes only itself and " +
+        "previous scripts");
+  `;
+
+  window.script2Executed = false;
+  script2.innerText = `
+    script2Executed = true;
+    assert_equals(document.scripts.length, kBaselineNumberOfScripts + 3,
+        "script2 executes synchronously, and thus observes itself and all " +
+        "previous scripts");
+  `;
+
+  assert_false(script0Executed, "Script0 does not execute before append()");
+  document.body.append(script0);
+  assert_true(script0Executed,
+      "Script0 executes synchronously during append()");
+
+  assert_false(script1Executed, "Script1 does not execute before append()");
+  assert_false(script2Executed, "Script2 does not execute before append()");
+  document.body.append(fragmentWithTwoScripts);
+  assert_true(script1Executed,
+      "Script1 executes synchronously during fragment append()");
+  assert_true(script2Executed,
+      "Script2 executes synchronously during fragment append()");
+}, "Script node insertion is not atomic with regard to execution. Each " +
+   "script is synchronously executed during the HTML element insertion " +
+   "steps hook");
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-constructor.any.js b/tests/wpt/tests/dom/observable/tentative/observable-constructor.any.js
index f108e902b32..2cd2ee2b664 100644
--- a/tests/wpt/tests/dom/observable/tentative/observable-constructor.any.js
+++ b/tests/wpt/tests/dom/observable/tentative/observable-constructor.any.js
@@ -235,14 +235,18 @@ test(t => {
 
   source.subscribe({
     complete: () => {
-      activeDuringComplete = innerSubscriber.active
-      abortedDuringComplete = innerSubscriber.active
+      activeDuringComplete = innerSubscriber.active;
+      abortedDuringComplete = innerSubscriber.signal.aborted;
     }
   });
   assert_true(activeBeforeComplete, "Subscription is active before complete");
   assert_false(abortedBeforeComplete, "Subscription is not aborted before complete");
-  assert_false(activeDuringComplete, "Subscription is not active during complete");
-  assert_false(abortedDuringComplete, "Subscription is not aborted during complete");
+  assert_false(activeDuringComplete,
+      "Subscription becomes inactive during Subscriber#complete(), just " +
+      "before Observer#complete() callback is invoked");
+  assert_true(abortedDuringComplete,
+      "Subscription's signal is aborted during Subscriber#complete(), just " +
+      "before Observer#complete() callback is invoked");
   assert_false(activeAfterComplete, "Subscription is not active after complete");
   assert_true(abortedAfterComplete, "Subscription is aborted after complete");
 }, "Subscription is inactive after complete()");
@@ -269,13 +273,18 @@ test(t => {
 
   source.subscribe({
     error: () => {
-      activeDuringError = innerSubscriber.active
+      activeDuringError = innerSubscriber.active;
+      abortedDuringError = innerSubscriber.signal.aborted;
     }
   });
   assert_true(activeBeforeError, "Subscription is active before error");
   assert_false(abortedBeforeError, "Subscription is not aborted before error");
-  assert_false(activeDuringError, "Subscription is not active during error");
-  assert_false(abortedDuringError, "Subscription is not aborted during error");
+  assert_false(activeDuringError,
+      "Subscription becomes inactive during Subscriber#error(), just " +
+      "before Observer#error() callback is invoked");
+  assert_true(abortedDuringError,
+      "Subscription's signal is aborted during Subscriber#error(), just " +
+      "before Observer#error() callback is invoked");
   assert_false(activeAfterError, "Subscription is not active after error");
   assert_true(abortedAfterError, "Subscription is not aborted after error");
 }, "Subscription is inactive after error()");
@@ -690,6 +699,18 @@ test(() => {
   assert_true(abortedDuringTeardown2, 'should be aborted during teardown callback 2');
 }, "Unsubscription lifecycle");
 
+test(t => {
+  let innerSubscriber = null;
+  const source = new Observable(subscriber => {
+    innerSubscriber = subscriber;
+    subscriber.error('calling error()');
+  });
+
+  source.subscribe();
+  assert_equals(innerSubscriber.signal.reason, "calling error()",
+      "Reason is set correctly");
+}, "Subscriber#error() value is stored as Subscriber's AbortSignal's reason");
+
 test(t => {
   const source = new Observable((subscriber) => {
     let n = 0;
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-drop.any.js b/tests/wpt/tests/dom/observable/tentative/observable-drop.any.js
new file mode 100644
index 00000000000..4b15fedfd33
--- /dev/null
+++ b/tests/wpt/tests/dom/observable/tentative/observable-drop.any.js
@@ -0,0 +1,152 @@
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.next(4);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  source.drop(2).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [3, 4, "complete"]);
+}, "drop(): Observable should skip the first n values from the source " +
+   "observable, then pass through the rest of the values and completion");
+
+test(() => {
+  const error = new Error('source error');
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.next(4);
+    subscriber.error(error);
+  });
+
+  const results = [];
+
+  source.drop(2).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [3, 4, error]);
+}, "drop(): Observable passes through errors from source Observable");
+
+test(() => {
+  const error = new Error('source error');
+  const source = new Observable(subscriber => {
+    subscriber.error(error);
+    subscriber.next(1);
+  });
+
+  const results = [];
+
+  source.drop(2).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [error]);
+}, "drop(): Observable passes through errors from source observable even " +
+   "before drop count is met");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  source.drop(2).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, ["complete"]);
+}, "drop(): Observable passes through completions from source observable even " +
+    "before drop count is met");
+
+test(() => {
+  let sourceTeardownCalled = false;
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => sourceTeardownCalled = true);
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.next(4);
+    subscriber.next(5);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  const controller = new AbortController();
+
+  source.drop(2).subscribe({
+    next: v => {
+      results.push(v);
+      if (v === 3) {
+        controller.abort();
+      }
+    },
+    error: (e) => results.push(e),
+    complete: () => results.push("complete"),
+  }, {signal: controller.signal});
+
+  assert_true(sourceTeardownCalled,
+      "Aborting outer observable unsubscribes the source observable");
+  assert_array_equals(results, [3]);
+}, "drop(): Unsubscribing from the Observable returned by drop() also " +
+    "unsubscribes from the source Observable");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  source.drop(0).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [1, 2, 3, "complete"],
+      "Source Observable is mirrored");
+}, "drop(): A drop amount of 0 simply mirrors the source Observable");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  // Passing `-1` here is subject to the Web IDL integer conversion semantics,
+  // which converts the drop amount to the maximum of `18446744073709551615`.
+  source.drop(-1).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, ["complete"], "Source Observable is mirrored");
+}, "drop(): Passing negative value wraps to maximum value ");
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-filter.any.js b/tests/wpt/tests/dom/observable/tentative/observable-filter.any.js
new file mode 100644
index 00000000000..8a49bcf4674
--- /dev/null
+++ b/tests/wpt/tests/dom/observable/tentative/observable-filter.any.js
@@ -0,0 +1,105 @@
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.next(4);
+    subscriber.complete();
+  });
+
+  const results = [];
+
+  source
+    .filter(value => value % 2 === 0)
+    .subscribe({
+      next: v => results.push(v),
+      error: () => results.push("error"),
+      complete: () => results.push("complete"),
+    });
+
+  assert_array_equals(results, [2, 4, "complete"]);
+}, "filter(): Returned Observable filters out results based on predicate");
+
+test(() => {
+  const error = new Error("error while filtering");
+  const results = [];
+  let teardownCalled = false;
+
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => teardownCalled = true);
+    subscriber.next(1);
+    assert_true(teardownCalled, "Teardown called once map unsubscribes due to error");
+    assert_false(subscriber.active, "Unsubscription makes Subscriber inactive");
+    subscriber.next(2);
+    subscriber.complete();
+  });
+
+  source
+    .filter(() => {
+      throw error;
+    })
+    .subscribe({
+      next: v => results.push(v),
+      error: e => results.push(e),
+      complete: () => results.push("complete"),
+    });
+
+  assert_array_equals(results, [error]);
+}, "filter(): Errors thrown in filter predicate are emitted to Observer error() handler");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.complete();
+    subscriber.next(2);
+  });
+
+  let predicateCalls = 0;
+  const results = [];
+  source.filter(v => ++predicateCalls).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push('complete'),
+  });
+
+  assert_equals(predicateCalls, 1, "Predicate is not called after complete()");
+  assert_array_equals(results, [1, "complete"]);
+}, "filter(): Passes complete() through from source Observable");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.error('error');
+    subscriber.next(2);
+  });
+
+  let predicateCalls = 0;
+  const results = [];
+  source.map(v => ++predicateCalls).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push('complete'),
+  });
+
+  assert_equals(predicateCalls, 1, "Predicate is not called after error()");
+  assert_array_equals(results, [1, "error"]);
+}, "filter(): Passes error() through from source Observable");
+
+test(() => {
+  const results = [];
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push('source teardown'));
+    subscriber.signal.addEventListener('abort',
+        () => results.push('source abort event'));
+
+    subscriber.complete();
+  });
+
+  source.filter(() => results.push('filter predicate called')).subscribe({
+    complete: () => results.push('filter observable complete'),
+  });
+
+  assert_array_equals(results,
+      ['source teardown', 'source abort event', 'filter observable complete']);
+}, "filter(): Upon source completion, source Observable teardown sequence " +
+   "happens after downstream filter complete() is called");
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-map.any.js b/tests/wpt/tests/dom/observable/tentative/observable-map.any.js
new file mode 100644
index 00000000000..275505fb5d0
--- /dev/null
+++ b/tests/wpt/tests/dom/observable/tentative/observable-map.any.js
@@ -0,0 +1,166 @@
+test(() => {
+  const results = [];
+  const indices = [];
+  const source = new Observable((subscriber) => {
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const mapped = source.map((value, i) => {
+    indices.push(i);
+    return value * 2;
+  });
+
+  assert_true(mapped instanceof Observable, "map() returns an Observable");
+
+  assert_array_equals(results, [], "Does not map until subscribed (values)");
+  assert_array_equals(indices, [], "Does not map until subscribed (indices)");
+
+  mapped.subscribe({
+    next: (value) => results.push(value),
+    error: () => results.push('error'),
+    complete: () => results.push('complete'),
+  });
+
+  assert_array_equals(results, [2, 4, 6, 'complete']);
+  assert_array_equals(indices, [0, 1, 2]);
+}, "map(): Maps values correctly");
+
+test(() => {
+  const error = new Error("error");
+  const results = [];
+  let teardownCalled = false;
+
+  const source = new Observable((subscriber) => {
+    subscriber.addTeardown(() => teardownCalled = true);
+
+    subscriber.next(1);
+    assert_false(teardownCalled,
+        "Teardown not called until until map unsubscribes due to error");
+    subscriber.next(2);
+    assert_true(teardownCalled, "Teardown called once map unsubscribes due to error");
+    assert_false(subscriber.active, "Unsubscription makes Subscriber inactive");
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const mapped = source.map((value) => {
+    if (value === 2) {
+      throw error;
+    }
+    return value * 2;
+  });
+
+  mapped.subscribe({
+    next: (value) => results.push(value),
+    error: (error) => results.push(error),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [2, error],
+      "Mapper errors are emitted to Observer error() handler");
+}, "map(): Mapper errors are emitted to Observer error() handler");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.complete();
+    subscriber.next(2);
+  });
+
+  let mapperCalls = 0;
+  const results = [];
+  source.map(v => {
+    mapperCalls++;
+    return v * 2;
+  }).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push('complete'),
+  });
+
+  assert_equals(mapperCalls, 1, "Mapper is not called after complete()");
+  assert_array_equals(results, [2, "complete"]);
+}, "map(): Passes complete() through from source Observable");
+
+test(() => {
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.error('error');
+    subscriber.next(2);
+  });
+
+  let mapperCalls = 0;
+  const results = [];
+  source.map(v => {
+    mapperCalls++;
+    return v * 2;
+  }).subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push('complete'),
+  });
+
+  assert_equals(mapperCalls, 1, "Mapper is not called after error()");
+  assert_array_equals(results, [2, "error"]);
+}, "map(): Passes error() through from source Observable");
+
+// This is mostly ensuring that the ordering in
+// https://wicg.github.io/observable/#dom-subscriber-complete is consistent.
+//
+// That is, the `Subscriber#complete()` method *first* closes itself and signals
+// abort on its own `Subscriber#signal()` and *then* calls whatever supplied
+// completion algorithm exists. In the case of `map()`, the "supplied completion
+// algorithm" is simply a set of internal observer steps that call
+// `Subscriber#complete()` on the *outer* mapper's Observer. This means the
+// outer Observer is notified of completion *after* the source Subscriber's
+// signal is aborted / torn down.
+test(() => {
+  const results = [];
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push('source teardown'));
+    subscriber.signal.addEventListener('abort',
+        () => results.push('source abort event'));
+
+    subscriber.complete();
+  });
+
+  source.map(() => results.push('mapper called')).subscribe({
+    complete: () => results.push('map observable complete'),
+  });
+
+  assert_array_equals(results,
+      ['source teardown', 'source abort event', 'map observable complete']);
+}, "map(): Upon source completion, source Observable teardown sequence " +
+   "happens before downstream mapper complete() is called");
+
+test(() => {
+  const results = [];
+  let sourceSubscriber = null;
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push('source teardown'));
+    sourceSubscriber = subscriber;
+
+    subscriber.next(1);
+  });
+
+  const controller = new AbortController();
+  source.map(v => v * 2).subscribe({
+    next: v => {
+      results.push(v);
+
+      // Triggers unsubscription to `source`.
+      controller.abort();
+
+      // Does nothing, since `source` is already torn down.
+      sourceSubscriber.next(100);
+    },
+    complete: () => results.push('mapper complete'),
+    error: e => results.push('mapper error'),
+  }, {signal: controller.signal});
+
+  assert_array_equals(results, [2, 'source teardown']);
+}, "map(): Map observable unsubscription causes source Observable " +
+   "unsubscription. Mapper Observer's complete()/error() are not called");
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-map.window.js b/tests/wpt/tests/dom/observable/tentative/observable-map.window.js
new file mode 100644
index 00000000000..06bf2e26b54
--- /dev/null
+++ b/tests/wpt/tests/dom/observable/tentative/observable-map.window.js
@@ -0,0 +1,40 @@
+async function loadIframeAndReturnContentWindow() {
+   // Create and attach an iframe.
+  const iframe = document.createElement('iframe');
+  const iframeLoadPromise = new Promise((resolve, reject) => {
+    iframe.onload = resolve;
+    iframe.onerror = reject;
+  });
+  document.body.append(iframe);
+  await iframeLoadPromise;
+  return iframe.contentWindow;
+}
+
+promise_test(async t => {
+  const contentWin = await loadIframeAndReturnContentWindow();
+
+  window.results = [];
+
+  contentWin.eval(`
+    const parentResults = parent.results;
+
+    const source = new Observable(subscriber => {
+      // Detach the document before calling next().
+      window.frameElement.remove();
+
+      // This invokes the map() operator's internal observer's next steps,
+      // which at least in Chromium, must have a special "context is detached"
+      // check to early-return, so as to not crash before invoking the "mapper"
+      // callback supplied to the map() operator.
+      subscriber.next(1);
+    });
+
+    source.map(value => {
+      parentResults.push(value);
+    }).subscribe(v => parentResults.push(v));
+  `);
+
+  // If we got here, we didn't crash! Let's also check that `results` is empty.
+  assert_array_equals(results, []);
+}, "map()'s internal observer's next steps do not crash in a detached document");
+
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-take.any.js b/tests/wpt/tests/dom/observable/tentative/observable-take.any.js
new file mode 100644
index 00000000000..8350d0214cc
--- /dev/null
+++ b/tests/wpt/tests/dom/observable/tentative/observable-take.any.js
@@ -0,0 +1,108 @@
+test(() => {
+  const results = [];
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push("source teardown"));
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const result = source.take(2);
+
+  result.subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [1, 2, "source teardown", "complete"]);
+}, "take(): Takes the first N values from the source observable, then completes");
+
+test(() => {
+  const results = [];
+  const source = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push("source teardown"));
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const result = source.take(5);
+
+  result.subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [1, 2, 3, "source teardown", "complete"],
+      "complete() is immediately forwarded");
+}, "take(): Forwards complete()s that happen before the take count is met, " +
+   "and unsubscribes from source Observable");
+
+test(() => {
+  const results = [];
+  const error = new Error('source error');
+  const source = new Observable(subscriber => {
+    subscriber.next(1);
+    subscriber.error(error);
+  });
+
+  const result = source.take(100);
+
+  result.subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, [1, error], "Errors are forwarded");
+}, "take(): Should forward errors from the source observable");
+
+test(() => {
+  const results = [];
+  const source = new Observable((subscriber) => {
+    results.push("source subscribe");
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  const result = source.take(0);
+
+  result.subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, ["complete"]);
+}, "take(): take(0) should not subscribe to the source observable, and " +
+   "should return an observable that immediately completes");
+
+test(() => {
+  const results = [];
+  const source = new Observable((subscriber) => {
+    results.push("source subscribe");
+    subscriber.next(1);
+    subscriber.next(2);
+    subscriber.next(3);
+    subscriber.complete();
+  });
+
+  // Per WebIDL, `-1` passed into an `unsigned long long` gets wrapped around
+  // into the maximum value (18446744073709551615), which means the `result`
+  // Observable captures everything that `source` does.
+  const result = source.take(-1);
+
+  result.subscribe({
+    next: v => results.push(v),
+    error: e => results.push(e),
+    complete: () => results.push("complete"),
+  });
+
+  assert_array_equals(results, ["source subscribe", 1, 2, 3, "complete"]);
+}, "take(): Negative count is treated as maximum value");
diff --git a/tests/wpt/tests/dom/observable/tentative/observable-takeUntil.any.js b/tests/wpt/tests/dom/observable/tentative/observable-takeUntil.any.js
index 6421777e09b..2895dd31e3f 100644
--- a/tests/wpt/tests/dom/observable/tentative/observable-takeUntil.any.js
+++ b/tests/wpt/tests/dom/observable/tentative/observable-takeUntil.any.js
@@ -32,74 +32,102 @@ promise_test(async () => {
 // `takeUntil()` operator, the spec responds to `notifier`'s `next()` by
 // unsubscribing from `notifier`, which is what this test asserts.
 promise_test(async () => {
-  const source = new Observable(subscriber => {});
+  const results = [];
+  const source = new Observable(subscriber => {
+    results.push('source subscribe callback');
+    subscriber.addTeardown(() => results.push('source teardown'));
+  });
 
-  let notifierSubscriberActiveBeforeNext;
-  let notifierSubscriberActiveAfterNext;
-  let teardownCalledAfterNext;
-  let notifierSignalAbortedAfterNext;
   const notifier = new Observable(subscriber => {
-    let teardownCalled;
-    subscriber.addTeardown(() => teardownCalled = true);
+    subscriber.addTeardown(() => results.push('notifier teardown'));
 
+    results.push('notifier subscribe callback');
     // Calling `next()` causes `takeUntil()` to unsubscribe from `notifier`.
-    notifierSubscriberActiveBeforeNext = subscriber.active;
+    results.push(`notifer active before next(): ${subscriber.active}`);
     subscriber.next('value');
-    notifierSubscriberActiveAfterNext = subscriber.active;
-    teardownCalledAfterNext = (teardownCalled === true);
-    notifierSignalAbortedAfterNext = subscriber.signal.aborted;
+    results.push(`notifer active after next(): ${subscriber.active}`);
   });
 
-  let nextOrErrorCalled = false;
-  let completeCalled = false;
   source.takeUntil(notifier).subscribe({
-    next: () => nextOrErrorCalled = true,
-    error: () => nextOrErrorCalled = true,
-    complete: () => completeCalled = true,
+    next: () => results.push('takeUntil() next callback'),
+    error: e => results.push(`takeUntil() error callback: ${error}`),
+    complete: () => results.push('takeUntil() complete callback'),
   });
-  assert_true(notifierSubscriberActiveBeforeNext);
-  assert_false(notifierSubscriberActiveAfterNext);
-  assert_true(teardownCalledAfterNext);
-  assert_true(notifierSignalAbortedAfterNext);
-  assert_false(nextOrErrorCalled);
-  assert_true(completeCalled);
-}, "takeUntil: notifier next() unsubscribes to notifier");
 
+  assert_array_equals(results, [
+    'notifier subscribe callback',
+    'notifer active before next(): true',
+    'notifier teardown',
+    'takeUntil() complete callback',
+    'notifer active after next(): false',
+  ]);
+}, "takeUntil: notifier next() unsubscribes from notifier");
 // This test is identical to the one above, with the exception being that the
 // `notifier` calls `subscriber.error()` instead `subscriber.next()`.
 promise_test(async () => {
-  const source = new Observable(subscriber => {});
+  const results = [];
+  const source = new Observable(subscriber => {
+    results.push('source subscribe callback');
+    subscriber.addTeardown(() => results.push('source teardown'));
+  });
 
-  let notifierSubscriberActiveBeforeNext;
-  let notifierSubscriberActiveAfterNext;
-  let teardownCalledAfterNext;
-  let notifierSignalAbortedAfterNext;
   const notifier = new Observable(subscriber => {
-    let teardownCalled;
-    subscriber.addTeardown(() => teardownCalled = true);
+    subscriber.addTeardown(() => results.push('notifier teardown'));
 
+    results.push('notifier subscribe callback');
     // Calling `next()` causes `takeUntil()` to unsubscribe from `notifier`.
-    notifierSubscriberActiveBeforeNext = subscriber.active;
+    results.push(`notifer active before error(): ${subscriber.active}`);
     subscriber.error('error');
-    notifierSubscriberActiveAfterNext = subscriber.active;
-    teardownCalledAfterNext = (teardownCalled === true);
-    notifierSignalAbortedAfterNext = subscriber.signal.aborted;
+    results.push(`notifer active after error(): ${subscriber.active}`);
   });
 
-  let nextOrErrorCalled = false;
-  let completeCalled = false;
   source.takeUntil(notifier).subscribe({
-    next: () => nextOrErrorCalled = true,
-    error: () => nextOrErrorCalled = true,
-    complete: () => completeCalled = true,
+    next: () => results.push('takeUntil() next callback'),
+    error: e => results.push(`takeUntil() error callback: ${error}`),
+    complete: () => results.push('takeUntil() complete callback'),
   });
-  assert_true(notifierSubscriberActiveBeforeNext);
-  assert_false(notifierSubscriberActiveAfterNext);
-  assert_true(teardownCalledAfterNext);
-  assert_true(notifierSignalAbortedAfterNext);
-  assert_false(nextOrErrorCalled);
-  assert_true(completeCalled);
-}, "takeUntil: notifier error() unsubscribes to notifier");
+
+  assert_array_equals(results, [
+    'notifier subscribe callback',
+    'notifer active before error(): true',
+    'notifier teardown',
+    'takeUntil() complete callback',
+    'notifer active after error(): false',
+  ]);
+}, "takeUntil: notifier error() unsubscribes from notifier");
+// This test is identical to the above except it `throw`s instead of calling
+// `Subscriber#error()`.
+promise_test(async () => {
+  const results = [];
+  const source = new Observable(subscriber => {
+    results.push('source subscribe callback');
+    subscriber.addTeardown(() => results.push('source teardown'));
+  });
+
+  const notifier = new Observable(subscriber => {
+    subscriber.addTeardown(() => results.push('notifier teardown'));
+
+    results.push('notifier subscribe callback');
+    // Calling `next()` causes `takeUntil()` to unsubscribe from `notifier`.
+    results.push(`notifer active before throw: ${subscriber.active}`);
+    throw new Error('custom error');
+    // Won't run:
+    results.push(`notifer active after throw: ${subscriber.active}`);
+  });
+
+  source.takeUntil(notifier).subscribe({
+    next: () => results.push('takeUntil() next callback'),
+    error: e => results.push(`takeUntil() error callback: ${error}`),
+    complete: () => results.push('takeUntil() complete callback'),
+  });
+
+  assert_array_equals(results, [
+    'notifier subscribe callback',
+    'notifer active before throw: true',
+    'notifier teardown',
+    'takeUntil() complete callback',
+  ]);
+}, "takeUntil: notifier throw Error unsubscribes from notifier");
 
 // Test that `notifier` unsubscribes from source Observable.
 promise_test(async t => {
@@ -130,9 +158,10 @@ promise_test(async t => {
   let notifierTeardownCalledBeforeCompleteCallback;
   await new Promise(resolve => {
     source.takeUntil(notifier).subscribe({
-      next: () => nextOrErrorCalled = true,
-      error: () => nextOrErrorCalled = true,
+      next: () => {nextOrErrorCalled = true; results.push('next callback');},
+      error: () => {nextOrErrorCalled = true; results.push('error callback');},
       complete: () => {
+        results.push('complete callback');
         notifierTeardownCalledBeforeCompleteCallback = notifierTeardownCalled;
         resolve();
       },
@@ -145,7 +174,7 @@ promise_test(async t => {
   // The notifier/source teardowns are not called by the time the outer
   // `Observer#complete()` callback is invoked, but they are all run *after*
   // (i.e., before `notifier`'s `subscriber.next()` returns internally).
-  assert_false(notifierTeardownCalledBeforeCompleteCallback);
+  assert_true(notifierTeardownCalledBeforeCompleteCallback);
   assert_true(notifierTeardownCalled);
   assert_array_equals(results, [
     "notifier subscribed",
@@ -153,7 +182,8 @@ promise_test(async t => {
     "notifier teardown",
     "notifier signal abort",
     "source teardown",
-    "source signal abort"
+    "source signal abort",
+    "complete callback",
   ]);
 }, "takeUntil: notifier next() unsubscribes from notifier & source observable");
 
diff --git a/tests/wpt/tests/editing/crashtests/enableInlineTableEditing-after-updating-selection-range-cross-shadow-dom-boundary.html b/tests/wpt/tests/editing/crashtests/enableInlineTableEditing-after-updating-selection-range-cross-shadow-dom-boundary.html
new file mode 100644
index 00000000000..b248e03ea05
--- /dev/null
+++ b/tests/wpt/tests/editing/crashtests/enableInlineTableEditing-after-updating-selection-range-cross-shadow-dom-boundary.html
@@ -0,0 +1,22 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<script>
+"use strict";
+
+document.addEventListener("DOMContentLoaded", () => {
+  window.find("A");
+  const range = document.createRange();
+  getSelection().addRange(range);
+  range.setEnd(document.querySelector("template").content, 0);
+  document.execCommand("enableInlineTableEditing", false, "true");
+});
+</script>
+<body>
+<template>
+</template>
+A
+<time contenteditable></time>
+</body>
+</html>
diff --git a/tests/wpt/tests/editing/include/editor-test-utils.js b/tests/wpt/tests/editing/include/editor-test-utils.js
index 24527d4a793..d0d50d22a66 100644
--- a/tests/wpt/tests/editing/include/editor-test-utils.js
+++ b/tests/wpt/tests/editing/include/editor-test-utils.js
@@ -32,7 +32,15 @@ class EditorTestUtils {
 
   sendKey(key, modifier) {
     if (!modifier) {
-      return this.window.test_driver.send_keys(this.editingHost, key)
+      // send_keys requires element in the light DOM.
+      const elementInLightDOM = (e => {
+        const doc = e.ownerDocument;
+        while (e.getRootNode({composed:false}) !== doc) {
+          e = e.getRootNode({composed:false}).host;
+        }
+        return e;
+      })(this.editingHost);
+      return this.window.test_driver.send_keys(elementInLightDOM, key)
         .catch(() => {
           return new this.window.test_driver.Actions()
           .keyDown(key)
diff --git a/tests/wpt/tests/editing/other/delete-in-shadow-hosted-in-body.html b/tests/wpt/tests/editing/other/delete-in-shadow-hosted-in-body.html
new file mode 100644
index 00000000000..4b02719ea02
--- /dev/null
+++ b/tests/wpt/tests/editing/other/delete-in-shadow-hosted-in-body.html
@@ -0,0 +1,81 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Delete editor in a shadow</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="../include/editor-test-utils.js"></script>
+<script>
+"use strict";
+
+addEventListener("load", () => {
+  const shadowRoot = document.body.attachShadow({mode: "open"});
+  for (const tag of ["input", "textarea"]) {
+    promise_test(async t => {
+      const textControl = document.createElement(tag);
+      textControl.value = "text";
+      shadowRoot.appendChild(textControl);
+      textControl.focus();
+      textControl.selectionStart = textControl.value.length;
+      const utils = new EditorTestUtils(textControl);
+      await utils.sendBackspaceKey();
+      assert_equals(
+        textControl.value,
+        "tex",
+        `Backspace in ${t.name} should delete character before the caret`
+      );
+      textControl.value = "text";
+      textControl.selectionStart = textControl.selectionEnd = 0;
+      await utils.sendDeleteKey();
+      assert_equals(
+        textControl.value,
+        "ext",
+        `Delete in ${t.name} should delete character after the caret`
+      );
+      textControl.value = "text";
+      textControl.select();
+      await utils.sendBackspaceKey();
+      assert_equals(
+        textControl.value,
+        "",
+        `Backspace after selecting all text in ${t.name} should delete all text`
+      );
+    }, `<${tag}> in shadow of the <body>`);
+  }
+
+  promise_test(async t => {
+    const editingHost = document.createElement("div");
+    editingHost.setAttribute("contenteditable", "");
+    shadowRoot.appendChild(editingHost);
+    const utils = new EditorTestUtils(editingHost);
+    utils.setupEditingHost("text[]");
+    await utils.sendBackspaceKey();
+    assert_equals(
+      editingHost.textContent,
+      "tex",
+      `Backspace in ${t.name} should delete character before the caret`
+    );
+    utils.setupEditingHost("[]text");
+    await utils.sendDeleteKey();
+    assert_equals(
+      editingHost.textContent,
+      "ext",
+      `Delete in ${t.name} should delete character after the caret`
+    );
+    utils.setupEditingHost("[text]");
+    await utils.sendBackspaceKey();
+    assert_equals(
+      editingHost.textContent,
+      "",
+      `Backspace after selecting all text in ${t.name} should delete all text`
+    );
+  }, "<div contenteditable> in shadow of the <body>");
+}, {once: true});
+</script>
+</head>
+<body></body>
+</html>
diff --git a/tests/wpt/tests/fenced-frame/notify-event-iframe.https.html b/tests/wpt/tests/fenced-frame/notify-event-iframe.https.html
new file mode 100644
index 00000000000..854db2f3036
--- /dev/null
+++ b/tests/wpt/tests/fenced-frame/notify-event-iframe.https.html
@@ -0,0 +1,102 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+<title>Test fenced frame notifyEvent() functionality with iframes</title>
+
+<body>
+  <script>
+    async function runNestedIFrameTest(frame_type) {
+      // Create a fenced frame that will respond to window.fence.notifyEvent().
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => notified = true);
+
+      await fencedframe.execute(async (frame_type) => {
+        window.addEventListener('message', (event) => {
+          window.click_error = event.data;
+        });
+
+        let iframe = null;
+        if (frame_type === 'same-origin') {
+          iframe = await attachIFrameContext({
+            origin: get_host_info().HTTPS_ORIGIN
+          });
+        } else if (frame_type === 'cross-origin') {
+          iframe = await attachIFrameContext({
+            origin: get_host_info().HTTPS_REMOTE_ORIGIN
+          });
+        }
+
+        // Calling notifyEvent() on click in the iframe should fail, but we need
+        // to move the exception out of the click handler to assert on it.
+        await iframe.execute(() => {
+          document.addEventListener('click', (e) => {
+            try {
+              window.fence.notifyEvent(e);
+            } catch (err) {
+              window.parent.postMessage(err, '*');
+              return;
+            }
+            window.parent.postMessage(new TypeError('No exception'), '*');
+          });
+        });
+      }, [frame_type]);
+
+      await multiClick(10, 10, fencedframe.element);
+
+      // Ensure the correct exception was thrown.
+      await fencedframe.execute(() => {
+        assert_equals(window.click_error.name, 'SecurityError');
+        assert_equals(window.click_error.message,
+          "Failed to execute 'notifyEvent' on 'Fence': notifyEvent is only available in fenced frame roots.");
+      });
+
+      // Because the notifyEvent() call failed, no event was sent to the
+      // top-level fenced frame.
+      assert_false(notified);
+    }
+
+    promise_test(async (t) => {
+      return runNestedIFrameTest('same-origin');
+    }, "Test that fenced frame notifyEvent() fails in a nested same-origin iframe.");
+
+    promise_test(async (t) => {
+      return runNestedIFrameTest('cross-origin');
+    }, "Test that fenced frame notifyEvent() fails in a nested cross-origin iframe.");
+
+    promise_test(async (t) => {
+      window.addEventListener('message', (event) => {
+        window.click_error = event.data;
+      });
+
+      const urn_iframe = await attachIFrameContext(
+                  {generator_api: 'fledge'});
+
+      await urn_iframe.execute(() => {
+        document.addEventListener('click', (e) => {
+          try {
+            window.fence.notifyEvent(e);
+          } catch (err) {
+            window.parent.postMessage(err, '*');
+            return;
+          }
+          window.parent.postMessage(new TypeError('No exception'), '*');
+        });
+      });
+
+      await multiClick(10, 10, urn_iframe.element);
+
+      assert_equals(window.click_error.name, 'SecurityError');
+      assert_equals(window.click_error.message,
+        "Failed to execute 'notifyEvent' on 'Fence': notifyEvent is only available in fenced frame roots.");
+    }, "Test that notifyEvent() fails in a URN iframe.");
+  </script>
+</body>
diff --git a/tests/wpt/tests/fenced-frame/notify-event-invalid.https.html b/tests/wpt/tests/fenced-frame/notify-event-invalid.https.html
new file mode 100644
index 00000000000..7695f49e0b6
--- /dev/null
+++ b/tests/wpt/tests/fenced-frame/notify-event-invalid.https.html
@@ -0,0 +1,96 @@
+<!DOCTYPE html>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+<title>Test that fenced frame notifyEvent() fails with invalid event parameters</title>
+
+<body>
+  <script>
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => notified = true);
+
+      // Only "click" is supported for now, so any other type of event should
+      // fail to notify.
+      await fencedframe.execute(() => {
+        document.addEventListener('mousedown', (e) => {
+          try {
+            window.fence.notifyEvent(e);
+          } catch (err) {
+            window.click_error = err;
+            return;
+          }
+          window.click_error = new TypeError('No exception');
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      await fencedframe.execute(() => {
+        assert_equals(window.click_error.name, 'SecurityError');
+        assert_equals(window.click_error.message,
+        "Failed to execute 'notifyEvent' on 'Fence': notifyEvent called with an unsupported event type.");
+      });
+
+      assert_false(notified);
+    }, "Test that fenced frame notifyEvent() fails using the incorrect event type.");
+
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => notified = true);
+
+      await fencedframe.execute(() => {
+        // Event objects constructed manually are not "trusted", so this event
+        // should fail to notify. "Trusted" means that the event was created by
+        // the user agent itself.
+        let fake_click = new Event('click');
+        try {
+          window.fence.notifyEvent(fake_click);
+        } catch (err) {
+          assert_equals(err.name, 'SecurityError');
+          assert_equals(err.message, "Failed to execute 'notifyEvent' on 'Fence': The triggering_event object is in an invalid state.");
+          return;
+        }
+        assert_unreached('An untrusted event must cause a SecurityError.');
+      });
+
+      assert_false(notified);
+    }, "Test that fenced frame notifyEvent() fails using an untrusted event.");
+
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreemousedown', () => {
+        notified = true;
+      });
+
+      // This click handler should not trigger the above handler on the
+      // HTMLFencedFrameElement, because its type is not 'fencedtreeclick'.
+      await fencedframe.execute(() => {
+        document.addEventListener('click', (e) => {
+          window.fence.notifyEvent(e);
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      // Wait 2s to let any event handling code settle.
+      await new Promise((resolve) => t.step_timeout(
+          () => resolve(), 2000));
+
+      assert_false(notified);
+    }, "Test that fenced frame notifyEvent() only invokes 'fencedtreeclick'.");
+  </script>
+</body>
diff --git a/tests/wpt/tests/fenced-frame/notify-event-nested-fenced-frames.https.html b/tests/wpt/tests/fenced-frame/notify-event-nested-fenced-frames.https.html
new file mode 100644
index 00000000000..d435cbc009d
--- /dev/null
+++ b/tests/wpt/tests/fenced-frame/notify-event-nested-fenced-frames.https.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+<title>Test that notifyEvent() in a nested fenced frame only notifies the immediate parent.</title>
+
+<body>
+  <script>
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext();
+      let topmost_notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => topmost_notified = true);
+
+      await fencedframe.execute(async () => {
+        const innerframe = await attachFencedFrameContext();
+        window.parent_notified = false;
+        innerframe.element.addEventListener('fencedtreeclick', () => window.parent_notified = true);
+
+        await innerframe.execute(() => {
+          document.addEventListener('click', (e) => {
+            window.fence.notifyEvent(e);
+          });
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      await fencedframe.execute(() => {
+        assert_true(window.parent_notified);
+      });
+
+      assert_false(topmost_notified);
+    }, "Test that notifyEvent() in a nested fenced frame only notifies the immediate parent.");
+  </script>
+</body>
diff --git a/tests/wpt/tests/fenced-frame/notify-event-success.https.html b/tests/wpt/tests/fenced-frame/notify-event-success.https.html
new file mode 100644
index 00000000000..76ed9abbfa0
--- /dev/null
+++ b/tests/wpt/tests/fenced-frame/notify-event-success.https.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+<title>Test that fenced frame notifyEvent() succeeds on click</title>
+
+<body>
+  <script>
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => notified = true);
+
+      // Add a click handler to the fenced frame's content, which will
+      // trigger the fenced handler registered above on the fencedframe
+      // element.
+      await fencedframe.execute(() => {
+        document.addEventListener('click', (e) => {
+          window.fence.notifyEvent(e);
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      assert_true(notified);
+    }, "Test that fenced frame notifyEvent() succeeds on click");
+
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.onfencedtreeclick = () => notified = true;
+
+      // Add a click handler to the fenced frame's content, which will
+      // trigger the fenced handler registered above on the fencedframe
+      // element.
+      await fencedframe.execute(() => {
+        document.addEventListener('click', (e) => {
+          window.fence.notifyEvent(e);
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      assert_true(notified);
+    }, "Test that fenced frame notifyEvent() succeeds on click when using the 'onfencedtreeclick' attribute.");
+  </script>
+</body>
diff --git a/tests/wpt/tests/fenced-frame/notify-event-transient-user-activation.https.html b/tests/wpt/tests/fenced-frame/notify-event-transient-user-activation.https.html
new file mode 100644
index 00000000000..ebf93940e54
--- /dev/null
+++ b/tests/wpt/tests/fenced-frame/notify-event-transient-user-activation.https.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+<title>Test that fenced frame notifyEvent() requires transient activation</title>
+
+<body>
+  <script>
+    promise_test(async (t) => {
+      const fencedframe = await attachFencedFrameContext(
+                  {generator_api: 'fledge'});
+      let notified = false;
+      fencedframe.element.addEventListener('fencedtreeclick', () => notified = true);
+
+      await fencedframe.execute(() => {
+        window.retained_activation = false;
+        document.addEventListener('click', async (e) => {
+          // Opening a new window consumes transient activation here, but that
+          // is *not explicitly stated in the spec.* However, we can't rely
+          // on other APIs to consume activation for us, since most of them are
+          // gated by permissions policies that fenced frames will not inherit.
+          // This call will just open a blank page, which is sufficient for
+          // this test.
+          window.open();
+          await new Promise((resolve) => t.step_timeout(
+            () => resolve(), 1000));
+          if (navigator.userActivation.isActive) {
+            window.retained_activation = true;
+          }
+          window.fence.notifyEvent(e);
+        });
+      });
+
+      await multiClick(10, 10, fencedframe.element);
+
+      // Wait 3s to let any event handling code settle.
+      await new Promise((resolve) => t.step_timeout(
+          () => resolve(), 3000));
+
+      await fencedframe.execute(() => {
+        assert_false(window.retained_activation);
+      });
+
+      assert_false(notified);
+    }, "Test that fenced frame notifyEvent() requires transient activation");
+  </script>
+</body>
diff --git a/tests/wpt/tests/fenced-frame/resources/utils.js b/tests/wpt/tests/fenced-frame/resources/utils.js
index 77af9449b29..d6cca914375 100644
--- a/tests/wpt/tests/fenced-frame/resources/utils.js
+++ b/tests/wpt/tests/fenced-frame/resources/utils.js
@@ -651,3 +651,19 @@ function setupCSP(csp, second_csp=null) {
     document.head.appendChild(second_meta);
   }
 }
+
+// Clicking in WPT tends to be flaky (https://crbug.com/1066891), so you may
+// need to click multiple times to have an effect. This function clicks at
+// coordinates `{x, y}` relative to `click_origin`, by default 3 times. Should
+// not be used for tests where multiple clicks have distinct impact on the state
+// of the page, but rather to bruteforce through flakes that rely on only one
+// click.
+async function multiClick(x, y, click_origin, times = 3) {
+  for (let i = 0; i < times; i++) {
+    let actions = new test_driver.Actions();
+    await actions.pointerMove(x, y, {origin: click_origin})
+        .pointerDown()
+        .pointerUp()
+        .send();
+  }
+}
diff --git a/tests/wpt/tests/gamepad/gamepad-secure-context.html b/tests/wpt/tests/gamepad/gamepad-secure-context.html
deleted file mode 100644
index 28641220fd8..00000000000
--- a/tests/wpt/tests/gamepad/gamepad-secure-context.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8" />
-<title>Gamepad Test: non-secure contexts</title>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script>
-  test(() => {
-    // To avoid breaking legacy apps getGamepads() should always be exposed on
-    // the navigator object, even in non-secure contexts.
-    assert_true("getGamepads" in Navigator.prototype, "in prototype");
-    assert_true("getGamepads" in navigator, "on instance");
-
-    // Calling navigator.getGamepads() should return an empty array even if
-    // there are connected gamepads.
-    assert_array_equals(navigator.getGamepads(), [],
-                        "getGamepads returns an empty array");
-
-    // Gamepad API types should not be exposed in non-secure contexts.
-    assert_equals(typeof(Gamepad), "undefined", "Gamepad type is undefined");
-    assert_equals(typeof(GamepadButton), "undefined",
-                  "GamepadButton type is undefined");
-    assert_equals(typeof(GamepadEvent), "undefined",
-                  "GamepadEvent type is undefined");
-  }, "Gamepad API is not exposed in non-secure contexts");
-</script>
diff --git a/tests/wpt/tests/gamepad/idlharness.https.window.js b/tests/wpt/tests/gamepad/idlharness.window.js
similarity index 100%
rename from tests/wpt/tests/gamepad/idlharness.https.window.js
rename to tests/wpt/tests/gamepad/idlharness.window.js
diff --git a/tests/wpt/tests/gamepad/not-fully-active.https.html b/tests/wpt/tests/gamepad/not-fully-active.html
similarity index 100%
rename from tests/wpt/tests/gamepad/not-fully-active.https.html
rename to tests/wpt/tests/gamepad/not-fully-active.html
diff --git a/tests/wpt/tests/generic-sensor/README.md b/tests/wpt/tests/generic-sensor/README.md
deleted file mode 100644
index 250300b51ed..00000000000
--- a/tests/wpt/tests/generic-sensor/README.md
+++ /dev/null
@@ -1,40 +0,0 @@
-The `resources/generic-sensor-helpers.js` tests require an implementation of
-the `GenericSensorTest` interface, which should emulate platform
-sensor backends. The `GenericSensorTest` interface is defined as:
-
-```
-  class MockSensor {
-    // Sets fake data that is used to deliver sensor reading updates.
-    async setSensorReading(FrozenArray<double> readingData);
-    setStartShouldFail(boolean shouldFail); // Sets flag that forces sensor to fail.
-    getSamplingFrequency(); // Return the sampling frequency.
-  };
-
-  class MockSensorProvider {
-    // Sets flag that forces mock SensorProvider to fail when getSensor() is
-    // invoked.
-    setGetSensorShouldFail(DOMString sensorType, boolean shouldFail);
-    // Sets flag that forces mock SensorProvider to permissions denied when
-    // getSensor() is invoked.
-    setPermissionsDenied(DOMString sensorType, boolean permissionsDenied);
-    getCreatedSensor(DOMString sensorType); // Return `MockSensor` interface.
-    setMaximumSupportedFrequency(double frequency); // Sets the maximum frequency.
-    setMinimumSupportedFrequency(double frequency); // Sets the minimum frequency.
-  }
-
-  class GenericSensorTest {
-    initialize();  // Sets up the testing environment.
-    async reset(); // Frees the resources.
-    getSensorProvider(); // Returns `MockSensorProvider` interface.
-  };
-```
-
-The Chromium implementation of the `GenericSensorTest` interface is located in
-[generic_sensor_mocks.js](../resources/chromium/generic_sensor_mocks.js).
-
-Other browser vendors should provide their own implementations of
-the `GenericSensorTest` interface.
-
-[Known issue](https://github.com/web-platform-tests/wpt/issues/9686): a
-WebDriver extension is a better approach for the Generic Sensor tests
-automation.
diff --git a/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html
new file mode 100644
index 00000000000..ded136a3ae1
--- /dev/null
+++ b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-dataChange.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Dynamic changes with textContent and dir=auto</title>
+<link rel="match" href="dir-auto-dynamic-simple-ref.html">
+<div>Test for elements with dir="auto" whose content changes between directional and neutral</div>
+<div dir="auto" id="from_ltr_to_ltr">abc</div>
+<div dir="auto" id="from_ltr_to_rtl">abc</div>
+<div dir="auto" id="from_ltr_to_neutral">abc</div>
+<div dir="auto" id="from_rtl_to_ltr">אבג</div>
+<div dir="auto" id="from_rtl_to_rtl">אבג</div>
+<div dir="auto" id="from_rtl_to_neutral">אבג</div>
+<div dir="auto" id="from_neutral_to_ltr">123</div>
+<div dir="auto" id="from_neutral_to_rtl">123</div>
+<div dir="auto" id="from_neutral_to_neutral">123</div>
+<script>
+function changeContent() {
+  var directionalTexts = {ltr:"xyz", rtl:"ابج", neutral:"456"};
+
+  for (var dirFrom in directionalTexts) {
+    for (var dirTo in directionalTexts) {
+      var element = document.getElementById("from_" + dirFrom +
+                                            "_to_" + dirTo);
+      element.firstChild.data = directionalTexts[dirTo];
+    }
+  }
+  document.documentElement.removeAttribute("class");
+}
+
+document.addEventListener("TestRendered", changeContent);
+</script>
diff --git a/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-ref.html b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-ref.html
new file mode 100644
index 00000000000..5a9a2f2484c
--- /dev/null
+++ b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-ref.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Dynamic changes and dir=auto</title>
+<div>Test for elements with dir="auto" whose content changes between directional and neutral</div>
+<div dir="auto">xyz</div>
+<div dir="auto">ابج</div>
+<div dir="auto">456</div>
+<div dir="auto">xyz</div>
+<div dir="auto">ابج</div>
+<div dir="auto">456</div>
+<div dir="auto">xyz</div>
+<div dir="auto">ابج</div>
+<div dir="auto">456</div>
diff --git a/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html
new file mode 100644
index 00000000000..6d785f08b81
--- /dev/null
+++ b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-replace.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Dynamic changes with textContent and dir=auto</title>
+<link rel="match" href="dir-auto-dynamic-simple-ref.html">
+<div>Test for elements with dir="auto" whose content changes between directional and neutral</div>
+<div dir="auto" id="from_ltr_to_ltr">abc</div>
+<div dir="auto" id="from_ltr_to_rtl">abc</div>
+<div dir="auto" id="from_ltr_to_neutral">abc</div>
+<div dir="auto" id="from_rtl_to_ltr">אבג</div>
+<div dir="auto" id="from_rtl_to_rtl">אבג</div>
+<div dir="auto" id="from_rtl_to_neutral">אבג</div>
+<div dir="auto" id="from_neutral_to_ltr">123</div>
+<div dir="auto" id="from_neutral_to_rtl">123</div>
+<div dir="auto" id="from_neutral_to_neutral">123</div>
+<script>
+function changeContent() {
+  var directionalTexts = {ltr:"xyz", rtl:"ابج", neutral:"456"};
+
+  for (var dirFrom in directionalTexts) {
+    for (var dirTo in directionalTexts) {
+      var element = document.getElementById("from_" + dirFrom +
+                                            "_to_" + dirTo);
+      element.firstChild.remove();
+      element.appendChild(document.createTextNode(directionalTexts[dirTo]));
+    }
+  }
+  document.documentElement.removeAttribute("class");
+}
+
+document.addEventListener("TestRendered", changeContent);
+</script>
diff --git a/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html
new file mode 100644
index 00000000000..3b644908ab0
--- /dev/null
+++ b/tests/wpt/tests/html/dom/elements/global-attributes/dir-auto-dynamic-simple-textContent.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>Dynamic changes with textContent and dir=auto</title>
+<link rel="match" href="dir-auto-dynamic-simple-ref.html">
+<div>Test for elements with dir="auto" whose content changes between directional and neutral</div>
+<div dir="auto" id="from_ltr_to_ltr">abc</div>
+<div dir="auto" id="from_ltr_to_rtl">abc</div>
+<div dir="auto" id="from_ltr_to_neutral">abc</div>
+<div dir="auto" id="from_rtl_to_ltr">אבג</div>
+<div dir="auto" id="from_rtl_to_rtl">אבג</div>
+<div dir="auto" id="from_rtl_to_neutral">אבג</div>
+<div dir="auto" id="from_neutral_to_ltr">123</div>
+<div dir="auto" id="from_neutral_to_rtl">123</div>
+<div dir="auto" id="from_neutral_to_neutral">123</div>
+<script>
+function changeContent() {
+  var directionalTexts = {ltr:"xyz", rtl:"ابج", neutral:"456"};
+
+  for (var dirFrom in directionalTexts) {
+    for (var dirTo in directionalTexts) {
+      var element = document.getElementById("from_" + dirFrom +
+                                            "_to_" + dirTo);
+      element.textContent = directionalTexts[dirTo];
+    }
+  }
+  document.documentElement.removeAttribute("class");
+}
+
+document.addEventListener("TestRendered", changeContent);
+</script>
diff --git a/tests/wpt/tests/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html b/tests/wpt/tests/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html
index 78bfb80e6fc..00f4c963173 100644
--- a/tests/wpt/tests/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html
+++ b/tests/wpt/tests/html/rendering/bidi-rendering/unicode-bidi-ua-rules.html
@@ -4,22 +4,104 @@
 <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#bidi-rendering">
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
+<script src='../../resources/common.js'></script>
 
 <body>
 <script>
-  const elements = ['address', 'blockquote', 'center', 'div', 'figure',
+  function getUnicodeBidi(el) {
+    return window.getComputedStyle(el, "").unicodeBidi;
+  }
+
+  // These elements should have `unicode-bidi: isolate` in the UA stylesheet:
+  const isolateElements = ['address', 'blockquote', 'center', 'div', 'figure',
       'figcaption', 'footer', 'form', 'header', 'hr', 'legend', 'listing',
       'main', 'p', 'plaintext', 'pre', 'summary', 'xmp', 'article', 'aside',
       'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hgroup', 'nav', 'section', 'search',
       'table', 'caption', 'colgroup', 'col', 'thead', 'tbody', 'tfoot', 'tr',
       'td', 'th', 'dir', 'dd', 'dl', 'dt', 'menu', 'ol', 'ul', 'li', 'bdi',
       'output'];
-  for(let tagname of elements) {
+  const allButSeparateTests = HTML5_ELEMENTS.filter(el => (!['bdo','input','textarea','pre'].includes(el)));
+  for(let tagname of allButSeparateTests) {
     test((t) => {
       const element = document.createElement(tagname);
       t.add_cleanup(() => element.remove());
       document.body.appendChild(element);
-      assert_equals(window.getComputedStyle(element, "").unicodeBidi,'isolate');
+      const expectation = isolateElements.includes(tagname) ? 'isolate' : 'normal';
+      assert_equals(getUnicodeBidi(element),expectation);
+
+      element.setAttribute('dir','ltr');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
+      element.setAttribute('dir','LtR');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
+      element.setAttribute('dir','rtl');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
+      element.setAttribute('dir','auto');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=auto');
+      element.setAttribute('dir','INVALID');
+      assert_equals(getUnicodeBidi(element),expectation,'invalid dir value goes back to normal defaults');
+    },`UA stylesheet rule for unicode-bidi, for <${tagname}>`);
+  }
+
+  test((t) => {
+    const element = document.createElement('bdo');
+    t.add_cleanup(() => element.remove());
+    document.body.appendChild(element);
+    assert_equals(getUnicodeBidi(element),'isolate-override');
+    element.setAttribute('dir','ltr');
+    assert_equals(getUnicodeBidi(element),'isolate-override','with dir=ltr');
+    element.setAttribute('dir','LtR');
+    assert_equals(getUnicodeBidi(element),'isolate-override','with dir=LtR (case insensitive)');
+    element.setAttribute('dir','rtl');
+    assert_equals(getUnicodeBidi(element),'isolate-override','with dir=rtl');
+    element.setAttribute('dir','auto');
+    assert_equals(getUnicodeBidi(element),'isolate-override','with dir=auto');
+    element.setAttribute('dir','INVALID');
+    assert_equals(getUnicodeBidi(element),'isolate-override','invalid dir value');
+  },`UA stylesheet rule for unicode-bidi, for <bdo>`);
+
+  const shouldBePlaintext = ['search','tel','url','email'];
+  for(let type of HTML5_INPUT_TYPES) {
+    test((t) => {
+      const element = document.createElement('input');
+      t.add_cleanup(() => element.remove());
+      element.type = type;
+      document.body.appendChild(element);
+      const autoExpectation = shouldBePlaintext.includes(type) ? 'plaintext' : 'isolate';
+      assert_equals(getUnicodeBidi(element),'normal');
+      element.setAttribute('dir','ltr');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
+      element.setAttribute('dir','LtR');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
+      element.setAttribute('dir','rtl');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
+      element.setAttribute('dir','auto');
+      assert_equals(getUnicodeBidi(element),autoExpectation,'with dir=auto');
+      element.setAttribute('dir','AuTo');
+      assert_equals(getUnicodeBidi(element),autoExpectation,'with dir=auto (case insensitive)');
+      element.setAttribute('dir','INVALID');
+      assert_equals(getUnicodeBidi(element),'normal','invalid dir value');
+    },`UA stylesheet rule for unicode-bidi, for <input type=${type}>`);
+  }
+
+  for(let tagname of ['textarea','pre']) {
+    test((t) => {
+      const element = document.createElement(tagname);
+      t.add_cleanup(() => element.remove());
+      document.body.appendChild(element);
+      const expectation = tagname === 'textarea' ? 'normal' : 'isolate';
+      assert_equals(getUnicodeBidi(element),expectation);
+      element.setAttribute('dir','ltr');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
+      element.setAttribute('dir','LtR');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
+      element.setAttribute('dir','rtl');
+      assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
+      element.setAttribute('dir','auto');
+      assert_equals(getUnicodeBidi(element),'plaintext','with dir=auto');
+      element.setAttribute('dir','AuTo');
+      assert_equals(getUnicodeBidi(element),'plaintext','with dir=auto (case insensitive)');
+      element.setAttribute('dir','INVALID');
+      assert_equals(getUnicodeBidi(element),expectation,'invalid dir value');
     },`UA stylesheet rule for unicode-bidi, for <${tagname}>`);
   }
 </script>
diff --git a/tests/wpt/tests/html/resources/common.js b/tests/wpt/tests/html/resources/common.js
index 4f9ec54dde8..fd4529e80aa 100644
--- a/tests/wpt/tests/html/resources/common.js
+++ b/tests/wpt/tests/html/resources/common.js
@@ -49,6 +49,12 @@ const HTML5_DEPRECATED_ELEMENTS = [
   'rtc',      'shadow',  'spacer',   'strike',   'tt',        'xmp'
 ];
 
+const HTML5_INPUT_TYPES = [
+  'hidden', 'text', 'search', 'tel', 'url', 'email', 'password', 'date',
+  'time', 'datetime-local', 'number', 'range', 'color', 'checkbox', 'radio',
+  'file', 'submit', 'image', 'reset', 'button'
+];
+
 function newDocument() {
     var d = document.implementation.createDocument();
     return d;
diff --git a/tests/wpt/tests/html/semantics/forms/the-input-element/change-to-empty-value.html b/tests/wpt/tests/html/semantics/forms/the-input-element/change-to-empty-value.html
new file mode 100644
index 00000000000..fd1eeb45846
--- /dev/null
+++ b/tests/wpt/tests/html/semantics/forms/the-input-element/change-to-empty-value.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Change event when clearing an input</title>
+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
+<link rel="author" href="https://mozilla.org" title="Mozilla">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1881457">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<input type="text" value="abc">
+<script>
+promise_test(async function() {
+  let input = document.querySelector("input");
+  let changeFired = false;
+  input.addEventListener("change", () => {
+    changeFired = true;
+  }, { once: true });
+  input.focus();
+  assert_equals(document.activeElement, input, "Should focus input");
+  assert_false(changeFired, "Shouldn't have fired change event after focus");
+  input.select();
+  const kBackspaceKey = "\uE003";
+  await test_driver.send_keys(input, kBackspaceKey)
+  assert_false(changeFired, "Shouldn't have fired change event after select");
+  input.blur();
+  assert_true(changeFired, "Should've have fired change event after blur");
+  assert_equals(input.value, "", "Should've have cleared the value");
+});
+</script>
diff --git a/tests/wpt/tests/html/semantics/forms/the-textarea-element/change-to-empty-value.html b/tests/wpt/tests/html/semantics/forms/the-textarea-element/change-to-empty-value.html
new file mode 100644
index 00000000000..b3aa7b416d0
--- /dev/null
+++ b/tests/wpt/tests/html/semantics/forms/the-textarea-element/change-to-empty-value.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Change event when clearing a textarea</title>
+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
+<link rel="author" href="https://mozilla.org" title="Mozilla">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1881457">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<textarea>abc</textarea>
+<script>
+promise_test(async function() {
+  let textarea = document.querySelector("textarea");
+  let changeFired = false;
+  textarea.addEventListener("change", () => {
+    changeFired = true;
+  }, { once: true });
+
+  textarea.focus();
+  assert_equals(document.activeElement, textarea, "Should focus textarea");
+  assert_false(changeFired, "Shouldn't have fired change event after focus");
+  textarea.select();
+  const kBackspaceKey = "\uE003";
+  await test_driver.send_keys(textarea, kBackspaceKey)
+  assert_false(changeFired, "Shouldn't have fired change event after select");
+  textarea.blur();
+  assert_true(changeFired, "Should've have fired change event after blur");
+  assert_equals(textarea.value, "", "Should've have cleared the value");
+});
+</script>
diff --git a/tests/wpt/tests/html/semantics/interactive-elements/the-dialog-element/dialog-open.html b/tests/wpt/tests/html/semantics/interactive-elements/the-dialog-element/dialog-open.html
index e1f4c6ab82a..bcd6ebebc19 100644
--- a/tests/wpt/tests/html/semantics/interactive-elements/the-dialog-element/dialog-open.html
+++ b/tests/wpt/tests/html/semantics/interactive-elements/the-dialog-element/dialog-open.html
@@ -37,7 +37,9 @@
 
     // close event is async, give it a chance to be fired
     t.step_timeout(function() {
-      t.done();
+      requestAnimationFrame(() => {
+        t.done();
+      });
     }, 0);
   }, "On setting it to false, the close event should not be fired");
 </script>
diff --git a/tests/wpt/tests/html/semantics/invokers/invoketarget-button-event-dispatch.tentative.html b/tests/wpt/tests/html/semantics/invokers/invoketarget-button-event-dispatch.tentative.html
index b19c1d3adcb..5150499bcf0 100644
--- a/tests/wpt/tests/html/semantics/invokers/invoketarget-button-event-dispatch.tentative.html
+++ b/tests/wpt/tests/html/semantics/invokers/invoketarget-button-event-dispatch.tentative.html
@@ -107,6 +107,7 @@
       "invoke",
       (event) => {
         eventInvoker = event.invoker;
+        eventTarget = event.target;
         called = true;
       },
       { once: true },
@@ -114,6 +115,7 @@
     invokerbutton.invokeTargetElement = svgInvokee;
     await clickOn(invokerbutton);
     assert_true(called, "event was called");
-    assert_true(eventInvoker == svgInvokee, "event invoker is set to right element");
-  }, "event dispatches if invoker is non-HTML Element");
+    assert_equals(eventInvoker, invokerbutton, "event.invoker is set to right element");
+    assert_equals(eventTarget, svgInvokee, "event.target is set to right element");
+  }, "event dispatches if invokee is non-HTML Element");
 </script>
diff --git a/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html b/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html
new file mode 100644
index 00000000000..7c87d2d0392
--- /dev/null
+++ b/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom-anchor.tentative.html
@@ -0,0 +1,99 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel="author" href="mailto:masonf@chromium.org">
+<link rel=help href="https://open-ui.org/components/popover.research.explainer">
+<link rel=help href="https://html.spec.whatwg.org/multipage/popover.html">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/popover-utils.js"></script>
+
+<!-- Once anchor positioning lands in the spec, the tests in this file can
+     be re-inserted into popover-shadow-dom.html. -->
+
+<script>
+  function findPopovers(root) {
+    let popovers = [];
+    if (!root)
+      return popovers;
+    if (root instanceof Element && root.matches('[popover]'))
+      popovers.push(root);
+    popovers.push(...findPopovers(root.shadowRoot));
+    root.childNodes.forEach(child => {
+      popovers.push(...findPopovers(child));
+    })
+    return popovers;
+  }
+  function getPopoverReferences(testId) {
+    const testRoot = document.querySelector(`#${testId}`);
+    assert_true(!!testRoot);
+    return findPopovers(testRoot);
+  }
+</script>
+
+<div id=test1>
+  <button id=t2b1>Test 1 Popover 1</button>
+  <div popover anchor=t2b1 style="top: 200px;">
+    <p>Popover 1</p>
+    <button id=t2b2>Test 1 Popover 2</button>
+  </div>
+  <my-element>
+    <template shadowrootmode=open>
+      <div popover anchor=t2b2 style="top: 400px;">
+        <p>Hiding this popover will hide *all* open popovers,</p>
+        <p>because t2b2 doesn't exist in this context.</p>
+      </div>
+    </template>
+  </my-element>
+</div>
+
+<script>
+  test(function() {
+    const [popover1,popover2] = getPopoverReferences('test1');
+    popover1.showPopover();
+    assert_true(popover1.matches(':popover-open'));
+    assert_true(isElementVisible(popover1));
+    popover2.showPopover();
+    assert_false(popover1.matches(':popover-open'), 'popover1 open'); // P1 was closed by P2
+    assert_false(isElementVisible(popover1), 'popover1 visible');
+    assert_true(popover2.matches(':popover-open'), 'popover2 open'); // P2 is open
+    assert_true(isElementVisible(popover2), 'popover2 visible');
+    popover2.hidePopover(); // Cleanup
+  }, "anchor references do not cross shadow boundaries");
+</script>
+
+
+<div id=test2>
+  <my-element>
+    <template shadowrootmode=open>
+      <button id=t3b1>Test 2 Popover 1</button>
+      <div popover anchor=t3b1>
+        <p>This popover will stay open when popover2 shows.</p>
+        <slot></slot>
+      </div>
+    </template>
+    <button id=t3b2>Test 2 Popover 2</button>
+  </my-element>
+  <div popover anchor=t3b2>Popover 2</div>
+</div>
+
+<script>
+  promise_test(async function() {
+    const [popover1,popover2] = getPopoverReferences('test2');
+    popover1.showPopover();
+    assert_true(popover1.matches(':popover-open'));
+    assert_true(isElementVisible(popover1));
+    // Showing popover2 should not close popover1, since it is a flat
+    // tree ancestor of popover2's anchor button.
+    popover2.showPopover();
+    assert_true(popover2.matches(':popover-open'));
+    assert_true(isElementVisible(popover2));
+    assert_true(popover1.matches(':popover-open'));
+    assert_true(isElementVisible(popover1));
+    popover1.hidePopover();
+    await waitForRender();
+    assert_false(popover1.matches(':popover-open'));
+    assert_false(isElementVisible(popover1));
+    assert_false(popover2.matches(':popover-open'));
+    assert_false(isElementVisible(popover2));
+  }, "anchor references use the flat tree not the DOM tree");
+</script>
diff --git a/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom.html b/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom.html
index 62aa135b562..18ac500270c 100644
--- a/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom.html
+++ b/tests/wpt/tests/html/semantics/popovers/popover-shadow-dom.html
@@ -8,17 +8,6 @@
 <script src="resources/popover-utils.js"></script>
 
 <script>
-  function ensureShadowDom(host) {
-    host.querySelectorAll('my-element').forEach(host => {
-      if (host.shadowRoot)
-        return; // Declarative Shadow DOM is enabled
-      const template = host.firstElementChild;
-      assert_true(template instanceof HTMLTemplateElement);
-      const shadow = host.attachShadow({mode: 'open'});
-      shadow.appendChild(template.content);
-      template.remove();
-    })
-  }
   function findPopovers(root) {
     let popovers = [];
     if (!root)
@@ -34,16 +23,12 @@
   function getPopoverReferences(testId) {
     const testRoot = document.querySelector(`#${testId}`);
     assert_true(!!testRoot);
-    ensureShadowDom(testRoot);
     return findPopovers(testRoot);
   }
-  function showTestPopover(testId,popoverNum) {
-    getPopoverReferences(testId)[popoverNum].showPopover();
-  }
 </script>
 
 <div id=test1>
-  <button onclick='showTestPopover("test1",0)'>Test1 Popover</button>
+  <button>Test1 Popover</button>
   <my-element>
     <template shadowrootmode=open>
       <div popover>
@@ -64,83 +49,14 @@
 </script>
 
 
-<div id=test2>
-  <button id=t2b1 onclick='showTestPopover("test2",0)'>Test 2 Popover 1</button>
-  <div popover anchor=t2b1 style="top: 200px;">
-    <p>Popover 1</p>
-    <button id=t2b2 onclick='showTestPopover("test2",1)'>Test 2 Popover 2</button>
-  </div>
-  <my-element>
-    <template shadowrootmode=open>
-      <div popover anchor=t2b2 style="top: 400px;">
-        <p>Hiding this popover will hide *all* open popovers,</p>
-        <p>because t2b2 doesn't exist in this context.</p>
-      </div>
-    </template>
-  </my-element>
-</div>
-
-<script>
-  test(function() {
-    const [popover1,popover2] = getPopoverReferences('test2');
-    popover1.showPopover();
-    assert_true(popover1.matches(':popover-open'));
-    assert_true(isElementVisible(popover1));
-    popover2.showPopover();
-    assert_false(popover1.matches(':popover-open'), 'popover1 open'); // P1 was closed by P2
-    assert_false(isElementVisible(popover1), 'popover1 visible');
-    assert_true(popover2.matches(':popover-open'), 'popover2 open'); // P2 is open
-    assert_true(isElementVisible(popover2), 'popover2 visible');
-    popover2.hidePopover(); // Cleanup
-  }, "anchor references do not cross shadow boundaries");
-</script>
-
-
-<div id=test3>
-  <my-element>
-    <template shadowrootmode=open>
-      <button id=t3b1 onclick='showTestPopover("test3",0)'>Test 3 Popover 1</button>
-      <div popover anchor=t3b1>
-        <p>This popover will stay open when popover2 shows.</p>
-        <slot></slot>
-      </div>
-    </template>
-    <button id=t3b2 onclick='showTestPopover("test3",1)'>Test 3 Popover 2</button>
-  </my-element>
-  <div popover anchor=t3b2>Popover 2</div>
-</div>
-
-<script>
-  promise_test(async function() {
-    const [popover1,popover2] = getPopoverReferences('test3');
-    popover1.showPopover();
-    assert_true(popover1.matches(':popover-open'));
-    assert_true(isElementVisible(popover1));
-    // Showing popover2 should not close popover1, since it is a flat
-    // tree ancestor of popover2's anchor button.
-    popover2.showPopover();
-    assert_true(popover2.matches(':popover-open'));
-    assert_true(isElementVisible(popover2));
-    assert_true(popover1.matches(':popover-open'));
-    assert_true(isElementVisible(popover1));
-    popover1.hidePopover();
-    await waitForRender();
-    assert_false(popover1.matches(':popover-open'));
-    assert_false(isElementVisible(popover1));
-    assert_false(popover2.matches(':popover-open'));
-    assert_false(isElementVisible(popover2));
-  }, "anchor references use the flat tree not the DOM tree");
-</script>
-
-
 <div id=test4>
-  <button id=t4b1 onclick='showTestPopover("test4",0)'>Test 4 Popover 1</button>
-  <div popover anchor=t4b1>
+  <button>Test 4 Popover 1</button>
+  <div popover>
     <p>This should not get hidden when popover2 opens.</p>
     <my-element>
       <template shadowrootmode=open>
-        <button id=t4b2 onclick='showTestPopover("test4",1)'>Test 4 Popover 2</button>
-        <div popover anchor=t4b2>
+        <button id=t4b2>Test 4 Popover 2</button>
+        <div popover>
           <p>This should not hide popover1.</p>
         </div>
       </template>
diff --git a/tests/wpt/tests/html/semantics/popovers/popovertarget-reflection.html b/tests/wpt/tests/html/semantics/popovers/popovertarget-reflection.html
index 7f265ae4eb5..b4f99631abd 100644
--- a/tests/wpt/tests/html/semantics/popovers/popovertarget-reflection.html
+++ b/tests/wpt/tests/html/semantics/popovers/popovertarget-reflection.html
@@ -1,15 +1,25 @@
 <!DOCTYPE html>
 <link rel=author href="mailto:jarhar@chromium.org">
 <link rel=help href="https://bugs.chromium.org/p/chromium/issues/detail?id=1523410">
+<link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=1879001">
 <link rel=help href="https://html.spec.whatwg.org/multipage/common-dom-interfaces.html#reflecting-content-attributes-in-idl-attributes:element">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
-<button id=mybutton>toggle popover</button>
+<button id=mybutton popovertarget="mypopover">toggle popover</button>
 <div id=mypopover popover=auto>popover</div>
 
 <script>
 test(() => {
+  assert_equals(mybutton.popoverTargetElement.id, "mypopover",
+    'Setting element.popoverTargetElement to a valid element should work');
+
+  mybutton.popoverTargetElement = null;
+  assert_false(mybutton.hasAttribute('popovertarget'),
+    'Setting element.popoverTargetElement to null should unset popovertarget attribute.');
+  assert_equals(mybutton.popoverTargetElement, null,
+    'Setting element.popoverTargetElement to null should remove the existing element from element.popoverTargetElement.');
+
   mybutton.popoverTargetElement = mypopover;
   assert_true(mybutton.hasAttribute('popovertarget'),
     'Assigning to element.popoverTargetElement should set the popovertarget attribute.');
@@ -17,5 +27,27 @@ test(() => {
   mybutton.removeAttribute('popovertarget');
   assert_equals(mybutton.popoverTargetElement, null,
     'Removing the popovertarget attribute should remove the element from element.popoverTargetElement.');
+
+  mybutton.popoverTargetElement = mypopover;
+  assert_true(mybutton.hasAttribute('popovertarget'),
+    'Assigning to element.popoverTargetElement should set the popovertarget attribute.');
+
+  mybutton.setAttribute("popovertarget", 'invalid');
+  assert_equals(mybutton.popoverTargetElement, null,
+    'Setting the popovertarget attribute to a localName that is not attr should remove the existing element from element.popoverTargetElement.');
+
+  mybutton.popoverTargetElement = mypopover;
+  mybutton.setAttribute("popovertarget", "");
+  assert_equals(mybutton.popoverTargetElement, null,
+    'Setting the popovertarget attribute to empty string right after setting explicit element does remove the explicit element.');
+
+  mybutton.setAttribute("popovertarget", "mypopover");
+  assert_equals(mybutton.popoverTargetElement.id, "mypopover",
+    'Setting the popovertarget attribute to a value should set the popover target element.');
+  mybutton.setAttribute("popovertarget", "");
+  assert_equals(mybutton.getAttribute('popovertarget'), "",
+    'Assigning to element.popoverTargetElement to empty string should update the attribute value to empty string.');
+  assert_equals(mybutton.popoverTargetElement, null,
+    'Setting the popovertarget attribute to empty string should remove the existing element from element.popoverTargetElement.');
 }, 'Element attribute reflection of popoverTargetElement/popovertarget should be kept in sync.');
 </script>
diff --git a/tests/wpt/tests/css/css-ui/user-find.tentative.html b/tests/wpt/tests/inert/inert-and-find.html
similarity index 76%
rename from tests/wpt/tests/css/css-ui/user-find.tentative.html
rename to tests/wpt/tests/inert/inert-and-find.html
index b15d813d11d..87555b0097e 100644
--- a/tests/wpt/tests/css/css-ui/user-find.tentative.html
+++ b/tests/wpt/tests/inert/inert-and-find.html
@@ -2,11 +2,11 @@
 <meta charset="utf-8">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/3460">
-<title>Basic test for the user-find property</title>
+<link rel="help" href="https://html.spec.whatwg.org/#inert-subtrees">
+<title>Basic test for inert and find</title>
 <body>
 <script>
-const t = async_test("Basic test for the user-find property");
+const t = async_test("Basic test for inert and find");
 
 function testFindable(findCount, textToFind, buildDoc, description) {
   if (typeof findCount == "boolean")
@@ -36,15 +36,11 @@ function testFindable(findCount, textToFind, buildDoc, description) {
 let runTests = t.step_func_done(function() {
   testFindable(true, "me", `
     Find me please
-  `, "sanity test");
+  `, "basic functionality test");
 
   testFindable(false, "me", `
-    <div style="user-find: none">Do not find me please</div>
+    <div inert>Do not find me please</div>
   `, "Basic use case");
-
-  testFindable(true, "me", `
-    <div style="user-find: none">Do not find me, but <span style="user-find: auto">find me please</span></div>
-  `, "nested");
 });
 
 window.onload = function() {
diff --git a/tests/wpt/tests/interfaces/uievents.idl b/tests/wpt/tests/interfaces/uievents.idl
index b34ca2e7753..21c40c308a8 100644
--- a/tests/wpt/tests/interfaces/uievents.idl
+++ b/tests/wpt/tests/interfaces/uievents.idl
@@ -226,25 +226,6 @@ partial dictionary KeyboardEventInit {
   unsigned long keyCode = 0;
 };
 
-[Exposed=Window]
-interface MutationEvent : Event {
-  // attrChangeType
-  const unsigned short MODIFICATION = 1;
-  const unsigned short ADDITION = 2;
-  const unsigned short REMOVAL = 3;
-
-  readonly attribute Node? relatedNode;
-  readonly attribute DOMString prevValue;
-  readonly attribute DOMString newValue;
-  readonly attribute DOMString attrName;
-  readonly attribute unsigned short attrChange;
-
-  undefined initMutationEvent(DOMString typeArg,
-    optional boolean bubblesArg = false,
-    optional boolean cancelableArg = false,
-    optional Node? relatedNodeArg = null,
-    optional DOMString prevValueArg = "",
-    optional DOMString newValueArg = "",
-    optional DOMString attrNameArg = "",
-    optional unsigned short attrChangeArg = 0);
-};
+// Removed MutationEvents manually here.
+// This really needs to be removed from the spec:
+// https://w3c.github.io/uievents/#interface-mutationevent
diff --git a/tests/wpt/tests/lint.ignore b/tests/wpt/tests/lint.ignore
index b5f6b2e4a3c..64266fc8e38 100644
--- a/tests/wpt/tests/lint.ignore
+++ b/tests/wpt/tests/lint.ignore
@@ -388,7 +388,6 @@ SET TIMEOUT: html/cross-origin-opener-policy/navigate-top-to-aboutblank.https.ht
 SET TIMEOUT: html/dom/documents/dom-tree-accessors/Document.currentScript.html
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/crbug-583445-regression.window.js
 SET TIMEOUT: html/webappapis/timers/*
-SET TIMEOUT: orientation-event/resources/orientation-event-helpers.js
 SET TIMEOUT: portals/history/resources/portal-harness.js
 SET TIMEOUT: requestidlecallback/deadline-after-expired-timer.html
 SET TIMEOUT: resources/*
@@ -580,6 +579,7 @@ MISSING-LINK: css/cssom-view/scrollTop-display-change.html
 
 # TODO https://github.com/web-platform-tests/wpt/issues/5770
 MISSING-LINK: css/css-highlight-api/idlharness.window.js
+MISSING-LINK: css/css-highlight-api/historical.window.js
 MISSING-LINK: css/geometry/*.worker.js
 MISSING-LINK: css/geometry/*.any.js
 MISSING-LINK: css/filter-effects/*.any.js
@@ -587,7 +587,6 @@ MISSING-LINK: css/filter-effects/*.any.js
 # Tests that use WebKit/Blink testing APIs
 LAYOUTTESTS APIS: import-maps/data-driven/resources/test-helper-iframe.js
 LAYOUTTESTS APIS: resources/chromium/enable-hyperlink-auditing.js
-LAYOUTTESTS APIS: resources/chromium/generic_sensor_mocks.js
 LAYOUTTESTS APIS: resources/chromium/webxr-test.js
 LAYOUTTESTS APIS: webxr/resources/webxr_util.js
 
@@ -614,7 +613,6 @@ MISSING DEPENDENCY: resources/chromium/web-bluetooth-test.js
 MISSING DEPENDENCY: resources/chromium/webusb-test.js
 MISSING DEPENDENCY: resources/chromium/fake-serial.js
 MISSING DEPENDENCY: resources/chromium/fake-hid.js
-MISSING DEPENDENCY: resources/chromium/generic_sensor_mocks.js
 MISSING DEPENDENCY: resources/chromium/mock-battery-monitor.js
 MISSING DEPENDENCY: resources/chromium/mock-barcodedetection.js
 MISSING DEPENDENCY: resources/chromium/mock-direct-sockets.js
diff --git a/tests/wpt/tests/mediacapture-record/MediaRecorder-peerconnection.https.html b/tests/wpt/tests/mediacapture-record/MediaRecorder-peerconnection.https.html
index 9d74ab59388..3fbc1f0f2d2 100644
--- a/tests/wpt/tests/mediacapture-record/MediaRecorder-peerconnection.https.html
+++ b/tests/wpt/tests/mediacapture-record/MediaRecorder-peerconnection.https.html
@@ -35,7 +35,9 @@ promise_setup(async () => {
    { kinds: { video }, mimeType: "video/webm;codecs=vp8" },
    { kinds: { video, audio }, mimeType: "video/webm;codecs=vp8,opus" },
    { kinds: { video }, mimeType: "video/webm;codecs=vp9" },
-   { kinds: { video, audio }, mimeType: "video/webm;codecs=vp9,opus" }
+   { kinds: { video, audio }, mimeType: "video/webm;codecs=vp9,opus" },
+   { kinds: { audio }, mimeType: "audio/mp4;codecs=mp4a.40.2" },
+   { kinds: { video, audio }, mimeType: "video/mp4;codecs=avc1,mp4a.40.2" }
   ]) {
     const tag = `${JSON.stringify(kinds)} mimeType "${mimeType}"`;
     const stream = new MediaStream([kinds.audio, kinds.video].filter(n => n));
diff --git a/tests/wpt/tests/orientation-event/README.md b/tests/wpt/tests/orientation-event/README.md
deleted file mode 100644
index 14ea2f51173..00000000000
--- a/tests/wpt/tests/orientation-event/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-The `resources/orientation-event-helpers.js` tests depend on the implementation of
-the `GenericSensorTest` interface which is defined in [README.md](../generic-sensor/README.md).
-
-The Chromium implementation of the `GenericSensorTest` interface is located in
-[generic_sensor_mocks.js](../resources/chromium/generic_sensor_mocks.js).
-
-Other browser vendors should provide their own implementations of
-the `GenericSensorTest` interface.
diff --git a/tests/wpt/tests/png/cICP-wins-ref.html b/tests/wpt/tests/png/cICP-wins-ref.html
new file mode 100644
index 00000000000..de7629453d9
--- /dev/null
+++ b/tests/wpt/tests/png/cICP-wins-ref.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<meta charset="utf-8">
+<title>PNG Third Edition: Coding Independent Code Points</title>
+<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
+<style>
+    .test {
+        width: 128px;
+        height: 64px;
+        background-color: green;
+    }
+</style>
+<body>
+    <p>Test passes if you see a green rectangle, and no red.</p>
+    <div class="test"><img src="support/srgb_green.png" alt=""></div>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/tests/png/cICP-wins.html b/tests/wpt/tests/png/cICP-wins.html
new file mode 100644
index 00000000000..c2aa29e3046
--- /dev/null
+++ b/tests/wpt/tests/png/cICP-wins.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<meta charset="utf-8">
+<title>PNG Third Edition: Coding Independent Code Points</title>
+<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
+<link rel="help" href="https://www.w3.org/TR/png-3/#11iCCP">
+<link rel="help" href="https://www.w3.org/TR/png-3/#cICP-chunk">
+
+<link rel="match" href="cICP-wins-ref.html">
+<meta name="assert" content="When the cICP chunk is present, decoders that recognize it SHALL ignore iCCP">
+<style>
+    .test {
+        width: 128px;
+        height: 64px;
+        background-color: red;
+    }
+</style>
+<body>
+    <p>Test passes if you see a green rectangle, and no red.</p>
+    <div class="test"><img src="support/cICP-and-iCCP.png" alt=""></div>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/tests/png/support/cICP-and-iCCP.png b/tests/wpt/tests/png/support/cICP-and-iCCP.png
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diff --git a/tests/wpt/tests/png/support/srgb_green.png b/tests/wpt/tests/png/support/srgb_green.png
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z*+fnu7SXTjdMi!(=dvd-@H8+QFt8n9kYHdYlXIYwfc^$v=2;ex4xN3eyqy6EJYD@<
J);T3K0RXcXDy{$k

literal 0
HcmV?d00001

diff --git a/tests/wpt/tests/pointerevents/pointerevent_click_during_capture.html b/tests/wpt/tests/pointerevents/pointerevent_click_during_capture.html
index e7448c7a8bd..d1791445572 100644
--- a/tests/wpt/tests/pointerevents/pointerevent_click_during_capture.html
+++ b/tests/wpt/tests/pointerevents/pointerevent_click_during_capture.html
@@ -1,138 +1,156 @@
-<!doctype html>
+<!DOCTYPE HTML>
+<title>Target of click-like events with pointer capture</title>
+<link rel="help" href="https://w3c.github.io/pointerevents/#event-dispatch" />
+<meta name="variant" content="?mouse-click">
+<meta name="variant" content="?mouse-auxclick">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="pointerevent_support.js"></script>
+
+<style>
+  div {
+    padding: 10px;
+  }
+  #parent {
+    background: grey;
+  }
+  #child1 {
+    background: green;
+  }
+  #child2 {
+    background: blue;
+  }
+</style>
+
+<div id="parent">
+  <div id="child1"></div>
+  <div id="child2"></div>
+</div>
+<div id="done"></div>
+
+<script>
+  'use strict';
+
+  const [pointer_type, event_to_test] = location.search.substring(1).split("-");
+  assert_true(["click", "auxclick"].includes(event_to_test));
+  assert_equals(pointer_type, "mouse");
+  // Other pointer types can generate click/auxclick and should be tested here.
+
+  const test_pointer = pointer_type + 'TestPointer';
+
+  let event_log = [];
+
+  function logEvent(event) {
+    if (event.eventPhase == event.AT_TARGET) {
+      event_log.push(event.type + '@' + event.target.id);
+    }
+  }
+
+  const parent = document.getElementById('parent');
+  const child2 = document.getElementById('child2');
+  const child1 = document.getElementById('child1');
+  const done = document.getElementById('done');
+
+  let logged_events = [
+    'gotpointercapture', 'lostpointercapture',
+    'pointerdown', 'pointerup', event_to_test
+  ];
+  logged_events.forEach(ename => {
+    [parent, child2, child1].forEach(target => {
+      target.addEventListener(ename, logEvent);
+    });
+  });
+
+  function dragBetweenChildrenAndClickOnDone(from_child, to_child, test) {
+    let actions_promise = new test_driver.Actions();
+
+    const button_type = (event_to_test === "click")
+        ? actions_promise.ButtonType.LEFT
+        : actions_promise.ButtonType.MIDDLE;
+
+    actions_promise.addPointer(test_pointer, pointer_type)
+      .pointerMove(0, 0, {origin:from_child})
+      .pointerDown({button:button_type})
+      .pointerMove(0, 0, {origin:to_child})
+      .pointerUp({button:button_type})
+      .pointerMove(0, 0, {origin:done})
+      .pointerDown()
+      .pointerUp();
+
+    let done_click_promise = getEvent('click', done, test);
+
+    return actions_promise.send().then(done_click_promise);
+  }
+
+  promise_test(async test => {
+    event_log = [];
+
+    await dragBetweenChildrenAndClickOnDone(child1, child1, test);
+
+    assert_equals(event_log.join(','),
+      `pointerdown@child1,pointerup@child1,${event_to_test}@child1`);
+  }, 'pointerdown/up at child1, no capture');
+
+  promise_test(async test => {
+    event_log = [];
+
+    getEvent('pointerdown', child1, test)
+      .then(event => child1.setPointerCapture(event.pointerId));
+    await dragBetweenChildrenAndClickOnDone(child1, child1, test);
+
+    assert_equals(event_log.join(','),
+      'pointerdown@child1,gotpointercapture@child1,' +
+      `pointerup@child1,lostpointercapture@child1,${event_to_test}@child1`);
+  }, 'pointerdown/up at child1, capture at child1');
+
+  promise_test(async test => {
+    event_log = [];
+
+    getEvent('pointerdown', child1, test)
+      .then(event => child2.setPointerCapture(event.pointerId));
+    await dragBetweenChildrenAndClickOnDone(child1, child1, test);
+
+    assert_equals(event_log.join(','),
+      'pointerdown@child1,gotpointercapture@child2,' +
+      `pointerup@child2,lostpointercapture@child2,${event_to_test}@child2`);
+  }, 'pointerdown/up at child1, capture at child2');
+
+  promise_test(async test => {
+    event_log = [];
+
+    await dragBetweenChildrenAndClickOnDone(child1, child2, test);
+
+    assert_equals(event_log.join(','),
+      `pointerdown@child1,pointerup@child2,${event_to_test}@parent`);
+  }, 'pointerdown at child1, pointerup at child2, no capture');
+
+  promise_test(async test => {
+    event_log = [];
+
+    getEvent('pointerdown', child1, test)
+      .then(event => child1.setPointerCapture(event.pointerId));
+    await dragBetweenChildrenAndClickOnDone(child1, child2, test);
+
+    assert_equals(event_log.join(','),
+      'pointerdown@child1,gotpointercapture@child1,' +
+      `pointerup@child1,lostpointercapture@child1,${event_to_test}@child1`);
+  }, 'pointerdown at child1, pointerup at child2, capture at child1');
+
+  promise_test(async test => {
+    event_log = [];
+
+    getEvent('pointerdown', child1, test)
+      .then(event => child2.setPointerCapture(event.pointerId));
+    await dragBetweenChildrenAndClickOnDone(child1, child2, test);
+
+    assert_equals(event_log.join(','),
+      'pointerdown@child1,gotpointercapture@child2,' +
+      `pointerup@child2,lostpointercapture@child2,${event_to_test}@child2`);
+  }, 'pointerdown at child1, pointerup at child2, capture at child2');
+</script>
 <html>
-    <head>
-        <title>click event target during capture</title>
-        <meta name="viewport" content="width=device-width">
-        <link rel="stylesheet" type="text/css" href="pointerevent_styles.css">
-        <script src="/resources/testharness.js"></script>
-        <script src="/resources/testharnessreport.js"></script>
-        <script src="pointerevent_support.js"></script>
-        <script src="/resources/testdriver.js"></script>
-        <script src="/resources/testdriver-actions.js"></script>
-        <script src="/resources/testdriver-vendor.js"></script>
-        <style>
-        .box {
-          margin: 10px;
-        }
-        #grey {
-          background: grey;
-        }
-        #blue {
-          background: blue;
-        }
-        #green {
-          background: green;
-        }
-        </style>
-        <script type="text/javascript">
-            PhaseEnum = {
-              Phase1:               "phase1",
-              Phase2:               "phase2",
-              Phase1WithCapturing:  "phase1withcapturing",
-              Phase2WithCapturing:  "phase2withcapturing",
-            }
-            var phase;
-            var receivedEvents;
-
-            function resetTestState() {
-              phase = PhaseEnum.Phase1;
-              receivedEvents = [];
-            }
-
-            function run() {
-                var test_pointerEvent = setup_pointerevent_test("click target during capture", ['mouse']);
-                var grey = document.getElementById('grey');
-                var blue = document.getElementById('blue');
-                var green = document.getElementById('green');
-                var actions_promise;
-
-                ['gotpointercapture', 'lostpointercapture', 'pointerdown', 'pointerup', 'click'].forEach(function(eventName) {
-                  [grey, blue, green].forEach(function(target) {
-                    target.addEventListener(eventName, function(event) {
-                      if (event.eventPhase == event.AT_TARGET) {
-                        receivedEvents.push(event.type + '@' + target.id);
-                        if (phase == PhaseEnum.Phase1 && target == green && event.type == 'click') {
-                            test(function() {
-                              assert_equals(receivedEvents.join(','), 'pointerdown@green,pointerup@green,click@green', 'An element should only receive click when it is the first common ancestor of pointerdown and pointerup targets');
-                            }, "Click target when pointerup/down targeted at the same element with no capture");
-                            phase = PhaseEnum.Phase2;
-                            receivedEvents = [];
-                        }
-                        if (phase == PhaseEnum.Phase2 && target == grey && event.type == 'click') {
-                            test(function() {
-                              assert_equals(receivedEvents.join(','), 'pointerdown@blue,pointerup@green,click@grey', 'An element should only receive click when it is the first common ancestor of pointerdown and pointerup targets');
-                            }, "Click target when pointerup/down targeted at different elements with no capture");
-                            phase = PhaseEnum.Phase1WithCapturing;
-                            receivedEvents = [];
-                        }
-                        if (target == blue && event.type == 'lostpointercapture') {
-                          if (phase == PhaseEnum.Phase1WithCapturing) {
-                            test_pointerEvent.step(function() {
-                              assert_equals(receivedEvents.join(','), 'pointerdown@green,gotpointercapture@blue,pointerup@blue,click@blue,lostpointercapture@blue', 'An element should only receive click when it is the first common ancestor of pointerdown and pointerup targets');
-                            });
-                            phase = PhaseEnum.Phase2WithCapturing;
-                            receivedEvents = [];
-                          } else if (phase == PhaseEnum.Phase2WithCapturing) {
-                            test_pointerEvent.step(function() {
-                              assert_equals(receivedEvents.join(','), 'pointerdown@blue,gotpointercapture@blue,pointerup@blue,click@blue,lostpointercapture@blue', 'An element should only receive click when it is the first common ancestor of pointerdown and pointerup targets');
-                            });
-                            // Make sure the test finishes after all the input actions are completed.
-                            actions_promise.then( () => {
-                              test_pointerEvent.done();
-                            });
-                          }
-                        }
-                        if (event.type == 'pointerdown' && (target == blue || target == green)) {
-                          if (phase == PhaseEnum.Phase1WithCapturing || phase == PhaseEnum.Phase2WithCapturing)
-                            blue.setPointerCapture(event.pointerId);
-                        }
-                      }
-                    });
-                  });
-                });
-
-                // Inject mouse inputs.
-                //
-                // TODO(mustaq@chromium.org): It is no longer testable manually.
-                // Switch it to a promise_test to simplify the code, and remove
-                // the instructions on HTML.
-                var actions_promise = new test_driver.Actions()
-                    .pointerMove(0, 0, {origin: green})
-                    .pointerDown()
-                    .pointerUp()
-                    .pointerMove(0, 0, {origin: blue})
-                    .pointerDown()
-                    .pointerMove(0, 0, {origin: green})
-                    .pointerUp()
-                    .pointerMove(0, 0, {origin: green})
-                    .pointerDown()
-                    .pointerUp()
-                    .pointerMove(0, 0, {origin: blue})
-                    .pointerDown()
-                    .pointerMove(0, 0, {origin: green})
-                    .pointerUp()
-                    .send();
-
-            }
-        </script>
-    </head>
-    <body onload="run()">
-        <h1>Pointer Event: click event during capture</h1>
-        <h2 id="pointerTypeDescription"></h2>
-        <h4>Test Description:
-            Click event should be sent to the first common ancestor of the pointerdown and pointerup targets.
-            <ol>
-                 <li>Click on the green box with the left button of mouse.</li>
-                 <li>Press down the left button on the blue box and drag to the green box and release the button.</li>
-                 <li>Repeat the two steps above once again.</li>
-            </ol>
-        </h4>
-        <br>
-        <div>
-          <div id="grey" class="box">
-            <div id="green" class="box"></div>
-            <div id="blue" class="box"></div>
-          </div>
-        </div>
-    </body>
 </html>
diff --git a/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js b/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js
deleted file mode 100644
index baf57c7c85a..00000000000
--- a/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js
+++ /dev/null
@@ -1,523 +0,0 @@
-import {ReportingMode, Sensor, SensorClientRemote, SensorReceiver, SensorRemote, SensorType} from '/gen/services/device/public/mojom/sensor.mojom.m.js';
-import {SensorCreationResult, SensorInitParams_READ_BUFFER_SIZE_FOR_TESTS} from '/gen/services/device/public/mojom/sensor_provider.mojom.m.js';
-import {WebSensorProvider, WebSensorProviderReceiver} from '/gen/third_party/blink/public/mojom/sensor/web_sensor_provider.mojom.m.js';
-
-// A "sliding window" that iterates over |data| and returns one item at a
-// time, advancing and wrapping around as needed. |data| must be an array of
-// arrays.
-self.RingBuffer = class {
-  constructor(data) {
-    this.bufferPosition_ = 0;
-    // Validate |data|'s format and deep-copy every element.
-    this.data_ = Array.from(data, element => {
-      if (!Array.isArray(element)) {
-        throw new TypeError('Every |data| element must be an array.');
-      }
-      return Array.from(element);
-    })
-  }
-
-  next() {
-    const value = this.data_[this.bufferPosition_];
-    this.bufferPosition_ = (this.bufferPosition_ + 1) % this.data_.length;
-    return { done: false, value: value };
-  }
-
-  value() {
-    return this.data_[this.bufferPosition_];
-  }
-
-  [Symbol.iterator]() {
-    return this;
-  }
-};
-
-class DefaultSensorTraits {
-  // https://w3c.github.io/sensors/#threshold-check-algorithm
-  static isSignificantlyDifferent(reading1, reading2) {
-    return true;
-  }
-
-  // https://w3c.github.io/sensors/#reading-quantization-algorithm
-  static roundToMultiple(reading) {
-    return reading;
-  }
-
-  // https://w3c.github.io/ambient-light/#ambient-light-threshold-check-algorithm
-  static areReadingsEqual(reading1, reading2) {
-    return false;
-  }
-}
-
-class AmbientLightSensorTraits extends DefaultSensorTraits {
-  // https://w3c.github.io/ambient-light/#reduce-sensor-accuracy
-  static #ROUNDING_MULTIPLE = 50;
-  static #SIGNIFICANCE_THRESHOLD = 25;
-
-  // https://w3c.github.io/ambient-light/#ambient-light-threshold-check-algorithm
-  static isSignificantlyDifferent([illuminance1], [illuminance2]) {
-    return Math.abs(illuminance1 - illuminance2) >=
-        this.#SIGNIFICANCE_THRESHOLD;
-  }
-
-  // https://w3c.github.io/ambient-light/#ambient-light-reading-quantization-algorithm
-  static roundToMultiple(reading) {
-    const illuminance = reading[0];
-    const scaledValue =
-        illuminance / AmbientLightSensorTraits.#ROUNDING_MULTIPLE;
-    let roundedReading = reading.splice();
-
-    if (illuminance < 0.0) {
-      roundedReading[0] = -AmbientLightSensorTraits.#ROUNDING_MULTIPLE *
-          Math.floor(-scaledValue + 0.5);
-    } else {
-      roundedReading[0] = AmbientLightSensorTraits.#ROUNDING_MULTIPLE *
-          Math.floor(scaledValue + 0.5);
-    }
-
-    return roundedReading;
-  }
-
-  // https://w3c.github.io/ambient-light/#ambient-light-threshold-check-algorithm
-  static areReadingsEqual([illuminance1], [illuminance2]) {
-    return illuminance1 === illuminance2;
-  }
-}
-
-self.GenericSensorTest = (() => {
-  // Default sensor frequency in default configurations.
-  const DEFAULT_FREQUENCY = 5;
-
-  // Class that mocks Sensor interface defined in
-  // https://cs.chromium.org/chromium/src/services/device/public/mojom/sensor.mojom
-  class MockSensor {
-    static #BUFFER_OFFSET_TIMESTAMP = 1;
-    static #BUFFER_OFFSET_READINGS = 2;
-
-    constructor(sensorRequest, buffer, reportingMode, sensorType) {
-      this.client_ = null;
-      this.startShouldFail_ = false;
-      this.notifyOnReadingChange_ = true;
-      this.reportingMode_ = reportingMode;
-      this.sensorType_ = sensorType;
-      this.sensorReadingTimerId_ = null;
-      this.readingData_ = null;
-      this.requestedFrequencies_ = [];
-      // The Blink implementation (third_party/blink/renderer/modules/sensor/sensor.cc)
-      // sets a timestamp by creating a DOMHighResTimeStamp from a given platform timestamp.
-      // In this mock implementation we use a starting value
-      // and an increment step value that resemble a platform timestamp reasonably enough.
-      this.timestamp_ = window.performance.timeOrigin;
-      // |buffer| represents a SensorReadingSharedBuffer on the C++ side in
-      // Chromium. It consists, in this order, of a
-      // SensorReadingField<OneWriterSeqLock> (an 8-byte union that includes
-      // 32-bit integer used by the lock class), and a SensorReading consisting
-      // of an 8-byte timestamp and 4 8-byte reading fields.
-      //
-      // |this.buffer_[0]| is zeroed by default, which allows OneWriterSeqLock
-      // to work with our custom memory buffer that did not actually create a
-      // OneWriterSeqLock instance. It is never changed manually here.
-      //
-      // Use MockSensor.#BUFFER_OFFSET_TIMESTAMP and
-      // MockSensor.#BUFFER_OFFSET_READINGS to access the other positions in
-      // |this.buffer_| without having to hardcode magic numbers in the code.
-      this.buffer_ = buffer;
-      this.buffer_.fill(0);
-      this.receiver_ = new SensorReceiver(this);
-      this.receiver_.$.bindHandle(sensorRequest.handle);
-      this.lastRawReading_ = null;
-      this.lastRoundedReading_ = null;
-
-      if (sensorType == SensorType.AMBIENT_LIGHT) {
-        this.sensorTraits = AmbientLightSensorTraits;
-      } else {
-        this.sensorTraits = DefaultSensorTraits;
-      }
-    }
-
-    // Returns default configuration.
-    async getDefaultConfiguration() {
-      return { frequency: DEFAULT_FREQUENCY };
-    }
-
-    // Adds configuration for the sensor and starts reporting fake data
-    // through setSensorReading function.
-    async addConfiguration(configuration) {
-      this.requestedFrequencies_.push(configuration.frequency);
-      // Sort using descending order.
-      this.requestedFrequencies_.sort(
-          (first, second) => { return second - first });
-
-      if (!this.startShouldFail_ )
-        this.startReading();
-
-      return { success: !this.startShouldFail_ };
-    }
-
-    // Removes sensor configuration from the list of active configurations and
-    // stops notification about sensor reading changes if
-    // requestedFrequencies_ is empty.
-    removeConfiguration(configuration) {
-      const index = this.requestedFrequencies_.indexOf(configuration.frequency);
-      if (index == -1)
-        return;
-
-      this.requestedFrequencies_.splice(index, 1);
-      if (this.requestedFrequencies_.length === 0)
-        this.stopReading();
-    }
-
-    // ConfigureReadingChangeNotifications(bool enabled)
-    // Configures whether to report a reading change when in ON_CHANGE
-    // reporting mode.
-    configureReadingChangeNotifications(notifyOnReadingChange) {
-      this.notifyOnReadingChange_ = notifyOnReadingChange;
-    }
-
-    resume() {
-      this.startReading();
-    }
-
-    suspend() {
-      this.stopReading();
-    }
-
-    // Mock functions
-
-    // Resets mock Sensor state.
-    reset() {
-      this.stopReading();
-      this.startShouldFail_ = false;
-      this.requestedFrequencies_ = [];
-      this.notifyOnReadingChange_ = true;
-      this.readingData_ = null;
-      this.buffer_.fill(0);
-      this.receiver_.$.close();
-      this.lastRawReading_ = null;
-      this.lastRoundedReading_ = null;
-    }
-
-    // Sets fake data that is used to deliver sensor reading updates.
-    setSensorReading(readingData) {
-      this.readingData_ = new RingBuffer(readingData);
-    }
-
-    // This is a workaround to accommodate Blink's Device Orientation
-    // implementation. In general, all tests should use setSensorReading()
-    // instead.
-    setSensorReadingImmediately(readingData) {
-      this.setSensorReading(readingData);
-
-      const reading = this.readingData_.value();
-      this.buffer_.set(reading, MockSensor.#BUFFER_OFFSET_READINGS);
-      this.buffer_[MockSensor.#BUFFER_OFFSET_TIMESTAMP] = this.timestamp_++;
-    }
-
-    // Sets flag that forces sensor to fail when addConfiguration is invoked.
-    setStartShouldFail(shouldFail) {
-      this.startShouldFail_ = shouldFail;
-    }
-
-    startReading() {
-      if (this.readingData_ != null) {
-        this.stopReading();
-      }
-      let maxFrequencyUsed = this.requestedFrequencies_[0];
-      let timeout = (1 / maxFrequencyUsed) * 1000;
-      this.sensorReadingTimerId_ = window.setInterval(() => {
-        if (this.readingData_) {
-          // |buffer_| is a TypedArray, so we need to make sure pass an
-          // array to set().
-          const reading = this.readingData_.next().value;
-          if (!Array.isArray(reading)) {
-            throw new TypeError("startReading(): The readings passed to " +
-              "setSensorReading() must be arrays");
-          }
-
-          if (this.reportingMode_ == ReportingMode.ON_CHANGE &&
-              this.lastRawReading_ !== null &&
-              !this.sensorTraits.isSignificantlyDifferent(
-                  this.lastRawReading_, reading)) {
-            // In case new value is not significantly different compared to
-            // old value, new value is not sent.
-            return;
-          }
-
-          this.lastRawReading_ = reading.slice();
-          const roundedReading = this.sensorTraits.roundToMultiple(reading);
-
-          if (this.reportingMode_ == ReportingMode.ON_CHANGE &&
-              this.lastRoundedReading_ !== null &&
-              this.sensorTraits.areReadingsEqual(
-                roundedReading, this.lastRoundedReading_)) {
-            // In case new rounded value is not different compared to old
-            // value, new value is not sent.
-            return;
-          }
-          this.buffer_.set(roundedReading, MockSensor.#BUFFER_OFFSET_READINGS);
-          this.lastRoundedReading_ = roundedReading;
-        }
-
-        // For all tests sensor reading should have monotonically
-        // increasing timestamp.
-        this.buffer_[MockSensor.#BUFFER_OFFSET_TIMESTAMP] = this.timestamp_++;
-
-        if (this.reportingMode_ === ReportingMode.ON_CHANGE &&
-            this.notifyOnReadingChange_) {
-          this.client_.sensorReadingChanged();
-        }
-      }, timeout);
-    }
-
-    stopReading() {
-      if (this.sensorReadingTimerId_ != null) {
-        window.clearInterval(this.sensorReadingTimerId_);
-        this.sensorReadingTimerId_ = null;
-      }
-      this.buffer_.fill(0);
-      this.lastRawReading_ = null;
-      this.lastRoundedReading_ = null;
-    }
-
-    getSamplingFrequency() {
-      if (this.requestedFrequencies_.length == 0) {
-        throw new Error("getSamplingFrequency(): No configured frequency");
-      }
-       return this.requestedFrequencies_[0];
-    }
-
-    isReadingData() {
-      return this.sensorReadingTimerId_ != null;
-    }
-  }
-
-  // Class that mocks the WebSensorProvider interface defined in
-  // https://cs.chromium.org/chromium/src/third_party/blink/public/mojom/sensor/web_sensor_provider.mojom
-  class MockSensorProvider {
-    constructor() {
-      this.readingSizeInBytes_ =
-          Number(SensorInitParams_READ_BUFFER_SIZE_FOR_TESTS);
-      this.sharedBufferSizeInBytes_ =
-          this.readingSizeInBytes_ * (SensorType.MAX_VALUE + 1);
-      let rv = Mojo.createSharedBuffer(this.sharedBufferSizeInBytes_);
-      if (rv.result != Mojo.RESULT_OK) {
-        throw new Error('MockSensorProvider: Failed to create shared buffer');
-      }
-      const handle = rv.handle;
-      rv = handle.mapBuffer(0, this.sharedBufferSizeInBytes_);
-      if (rv.result != Mojo.RESULT_OK) {
-        throw new Error("MockSensorProvider: Failed to map shared buffer");
-      }
-      this.shmemArrayBuffer_ = rv.buffer;
-      rv = handle.duplicateBufferHandle({readOnly: true});
-      if (rv.result != Mojo.RESULT_OK) {
-        throw new Error(
-            'MockSensorProvider: failed to duplicate shared buffer');
-      }
-      this.readOnlySharedBufferHandle_ = rv.handle;
-      this.activeSensors_ = new Map();
-      this.resolveFuncs_ = new Map();
-      this.getSensorShouldFail_ = new Map();
-      this.permissionsDenied_ = new Map();
-      this.maxFrequency_ = 60;
-      this.minFrequency_ = 1;
-      this.mojomSensorType_ = new Map([
-        ['Accelerometer', SensorType.ACCELEROMETER],
-        ['LinearAccelerationSensor', SensorType.LINEAR_ACCELERATION],
-        ['GravitySensor', SensorType.GRAVITY],
-        ['AmbientLightSensor', SensorType.AMBIENT_LIGHT],
-        ['Gyroscope', SensorType.GYROSCOPE],
-        ['Magnetometer', SensorType.MAGNETOMETER],
-        ['AbsoluteOrientationSensor',
-            SensorType.ABSOLUTE_ORIENTATION_QUATERNION],
-        ['AbsoluteOrientationEulerAngles',
-            SensorType.ABSOLUTE_ORIENTATION_EULER_ANGLES],
-        ['RelativeOrientationSensor',
-            SensorType.RELATIVE_ORIENTATION_QUATERNION],
-        ['RelativeOrientationEulerAngles',
-            SensorType.RELATIVE_ORIENTATION_EULER_ANGLES],
-        ['ProximitySensor', SensorType.PROXIMITY]
-      ]);
-      this.receiver_ = new WebSensorProviderReceiver(this);
-
-      this.interceptor_ =
-        new MojoInterfaceInterceptor(WebSensorProvider.$interfaceName);
-      this.interceptor_.oninterfacerequest = e => {
-        this.bindToPipe(e.handle);
-      };
-      this.interceptor_.start();
-    }
-
-    // Returns initialized Sensor proxy to the client.
-    async getSensor(type) {
-      if (this.getSensorShouldFail_.get(type)) {
-        return {result: SensorCreationResult.ERROR_NOT_AVAILABLE,
-                initParams: null};
-      }
-      if (this.permissionsDenied_.get(type)) {
-        return {result: SensorCreationResult.ERROR_NOT_ALLOWED,
-                initParams: null};
-      }
-
-      const offset = type * this.readingSizeInBytes_;
-      const reportingMode = ReportingMode.ON_CHANGE;
-
-      const sensor = new SensorRemote();
-      if (!this.activeSensors_.has(type)) {
-        const shmemView = new Float64Array(
-            this.shmemArrayBuffer_, offset,
-            this.readingSizeInBytes_ / Float64Array.BYTES_PER_ELEMENT);
-        const mockSensor = new MockSensor(
-            sensor.$.bindNewPipeAndPassReceiver(), shmemView, reportingMode,
-            type);
-        this.activeSensors_.set(type, mockSensor);
-        this.activeSensors_.get(type).client_ = new SensorClientRemote();
-      }
-
-      const rv = this.readOnlySharedBufferHandle_.duplicateBufferHandle(
-          {readOnly: true});
-      if (rv.result != Mojo.RESULT_OK) {
-        throw new Error('getSensor(): failed to duplicate shared buffer');
-      }
-
-      const defaultConfig = { frequency: DEFAULT_FREQUENCY };
-      // Consider sensor traits to meet assertions in C++ code (see
-      // services/device/public/cpp/generic_sensor/sensor_traits.h)
-      if (type == SensorType.AMBIENT_LIGHT || type == SensorType.MAGNETOMETER) {
-        this.maxFrequency_ = Math.min(10, this.maxFrequency_);
-      }
-
-      const client = this.activeSensors_.get(type).client_;
-      const initParams = {
-        sensor,
-        clientReceiver: client.$.bindNewPipeAndPassReceiver(),
-        memory: {buffer: rv.handle},
-        bufferOffset: BigInt(offset),
-        mode: reportingMode,
-        defaultConfiguration: defaultConfig,
-        minimumFrequency: this.minFrequency_,
-        maximumFrequency: this.maxFrequency_
-      };
-
-      if (this.resolveFuncs_.has(type)) {
-        for (let resolveFunc of this.resolveFuncs_.get(type)) {
-          resolveFunc(this.activeSensors_.get(type));
-        }
-        this.resolveFuncs_.delete(type);
-      }
-
-      return {result: SensorCreationResult.SUCCESS, initParams};
-    }
-
-    // Binds object to mojo message pipe
-    bindToPipe(pipe) {
-      this.receiver_.$.bindHandle(pipe);
-    }
-
-    // Mock functions
-
-    // Resets state of mock SensorProvider between test runs.
-    reset() {
-      for (const sensor of this.activeSensors_.values()) {
-        sensor.reset();
-      }
-      this.activeSensors_.clear();
-      this.resolveFuncs_.clear();
-      this.getSensorShouldFail_.clear();
-      this.permissionsDenied_.clear();
-      this.maxFrequency_ = 60;
-      this.minFrequency_ = 1;
-      this.receiver_.$.close();
-      this.interceptor_.stop();
-    }
-
-    // Sets flag that forces mock SensorProvider to fail when getSensor() is
-    // invoked.
-    setGetSensorShouldFail(sensorType, shouldFail) {
-      this.getSensorShouldFail_.set(this.mojomSensorType_.get(sensorType),
-          shouldFail);
-    }
-
-    setPermissionsDenied(sensorType, permissionsDenied) {
-      this.permissionsDenied_.set(this.mojomSensorType_.get(sensorType),
-          permissionsDenied);
-    }
-
-    // Returns mock sensor that was created in getSensor to the layout test.
-    getCreatedSensor(sensorType) {
-      const type = this.mojomSensorType_.get(sensorType);
-      if (typeof type != "number") {
-        throw new TypeError(`getCreatedSensor(): Invalid sensor type ${sensorType}`);
-      }
-
-      if (this.activeSensors_.has(type)) {
-        return Promise.resolve(this.activeSensors_.get(type));
-      }
-
-      return new Promise(resolve => {
-        if (!this.resolveFuncs_.has(type)) {
-          this.resolveFuncs_.set(type, []);
-        }
-        this.resolveFuncs_.get(type).push(resolve);
-      });
-    }
-
-    // Sets the maximum frequency for a concrete sensor.
-    setMaximumSupportedFrequency(frequency) {
-      this.maxFrequency_ = frequency;
-    }
-
-    // Sets the minimum frequency for a concrete sensor.
-    setMinimumSupportedFrequency(frequency) {
-      this.minFrequency_ = frequency;
-    }
-  }
-
-  let testInternal = {
-    initialized: false,
-    sensorProvider: null
-  }
-
-  class GenericSensorTestChromium {
-    constructor() {
-      Object.freeze(this); // Make it immutable.
-    }
-
-    async initialize() {
-      if (testInternal.initialized)
-        throw new Error('Call reset() before initialize().');
-
-      // Grant sensor permissions for Chromium testdriver.
-      // testdriver.js only works in the top-level browsing context, so do
-      // nothing if we're in e.g. an iframe.
-      if (window.parent === window) {
-        for (const entry
-                 of ['accelerometer', 'gyroscope', 'magnetometer',
-                     'ambient-light-sensor']) {
-          await test_driver.set_permission({name: entry}, 'granted');
-        }
-      }
-
-      testInternal.sensorProvider = new MockSensorProvider;
-      testInternal.initialized = true;
-    }
-    // Resets state of sensor mocks between test runs.
-    async reset() {
-      if (!testInternal.initialized)
-        throw new Error('Call initialize() before reset().');
-      testInternal.sensorProvider.reset();
-      testInternal.sensorProvider = null;
-      testInternal.initialized = false;
-
-      // Wait for an event loop iteration to let any pending mojo commands in
-      // the sensor provider finish.
-      await new Promise(resolve => setTimeout(resolve, 0));
-    }
-
-    getSensorProvider() {
-      return testInternal.sensorProvider;
-    }
-  }
-
-  return GenericSensorTestChromium;
-})();
diff --git a/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js.headers b/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js.headers
deleted file mode 100644
index 6805c323df5..00000000000
--- a/tests/wpt/tests/resources/chromium/generic_sensor_mocks.js.headers
+++ /dev/null
@@ -1 +0,0 @@
-Content-Type: text/javascript; charset=utf-8
diff --git a/tests/wpt/tests/scroll-animations/css/animation-range-visual-test.html b/tests/wpt/tests/scroll-animations/css/animation-range-visual-test.html
index 1ff2b12d1f9..8720bfbb739 100644
--- a/tests/wpt/tests/scroll-animations/css/animation-range-visual-test.html
+++ b/tests/wpt/tests/scroll-animations/css/animation-range-visual-test.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range">
 <link rel="match" href="animation-range-visual-test-ref.html">
-<meta name=fuzzy content="maxDifference=0-64;totalPixels=0-15">
+<meta name=fuzzy content="maxDifference=0-64;totalPixels=0-25">
 <link rel="stylesheet" href="support/animation-range.css">
 <script src="/common/reftest-wait.js"></script>
 <script src="/web-animations/testcommon.js"></script>
diff --git a/tests/wpt/tests/selection/crashtests/selection-modify-around-textarea.html b/tests/wpt/tests/selection/crashtests/selection-modify-around-textarea.html
new file mode 100644
index 00000000000..113dea5ffa0
--- /dev/null
+++ b/tests/wpt/tests/selection/crashtests/selection-modify-around-textarea.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<script>
+"use strict";
+document.addEventListener("DOMContentLoaded", () => {
+  const time = document.querySelector("time");
+  getSelection().setBaseAndExtent(time, 2, time, 3);
+  getSelection().modify("move", "left", "line");
+  getSelection().collapseToStart();
+});
+</script>
+</head>
+<body><time style="user-select:none">
+<h5>
+<pre contenteditable></pre>
+<textarea></textarea>
+</h5>
+<h6></h6>
+<textarea></textarea>
+</body>
+</html>
diff --git a/tests/wpt/tests/service-workers/service-worker/local-url-inherit-controller.https.html b/tests/wpt/tests/service-workers/service-worker/local-url-inherit-controller.https.html
index 6702abcadbb..867e1b006d6 100644
--- a/tests/wpt/tests/service-workers/service-worker/local-url-inherit-controller.https.html
+++ b/tests/wpt/tests/service-workers/service-worker/local-url-inherit-controller.https.html
@@ -79,6 +79,24 @@ promise_test(function(t) {
   });
 }, 'Same-origin blob URL worker should intercept fetch().');
 
+promise_test(function(t) {
+  return doAsyncTest(t, {
+    scheme: 'blob',
+    child: 'sharedworker',
+    check: 'controller',
+    expect: 'inherit',
+  });
+}, 'Same-origin blob URL sharedworker should inherit service worker controller.');
+
+promise_test(function(t) {
+  return doAsyncTest(t, {
+    scheme: 'blob',
+    child: 'sharedworker',
+    check: 'fetch',
+    expect: 'intercept',
+  });
+}, 'Same-origin blob URL sharedworker should intercept fetch().');
+
 promise_test(function(t) {
   return doAsyncTest(t, {
     scheme: 'data',
diff --git a/tests/wpt/tests/service-workers/service-worker/resources/local-url-inherit-controller-frame.html b/tests/wpt/tests/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
index b1e554d2204..3a5d9b51e75 100644
--- a/tests/wpt/tests/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
+++ b/tests/wpt/tests/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
@@ -42,7 +42,33 @@ const workerFetchText =
   self.postMessage(text);
 }).catch(e => {
   self.postMessage(e.message);
-});`
+});`;
+
+const sharedWorkerControllerText =
+`const ports = [];
+self.onconnect = evt => {
+  const port = evt.ports[0];
+  ports.push(port);
+  const t = navigator.serviceWorker.controller
+        ? navigator.serviceWorker.controller.scriptURL
+        : null;
+  port.postMessage(t);
+};
+self.onerror = msg => {
+  ports.forEach(port => {port.postMessage(msg);});
+};`;
+
+const sharedWorkerFetchText =
+`self.onconnect = evt => {
+  const port = evt.ports[0];
+  fetch('${fetchURL}', { mode: 'no-cors' }).then(response => {
+    return response.text();
+  }).then(text => {
+    port.postMessage(text);
+  }).catch(e => {
+    port.postMessage(e.message);
+  });
+};`;
 
 function getChildText(opts) {
   if (opts.child === 'iframe') {
@@ -69,6 +95,18 @@ function getChildText(opts) {
     throw('unexpected feature to check: ' + opts.check);
   }
 
+  if (opts.child === 'sharedworker') {
+    if (opts.check === 'controller') {
+      return sharedWorkerControllerText;
+    }
+
+    if (opts.check === 'fetch') {
+      return sharedWorkerFetchText;
+    }
+
+    throw('unexpected feature to check: ' + opts.check);
+  }
+
   throw('unexpected child type ' + opts.child);
 }
 
@@ -98,6 +136,22 @@ function testWorkerChild(url) {
   });
 }
 
+function testSharedWorkerChild(url) {
+  let w = new SharedWorker(url);
+  return new Promise((resolve, reject) => {
+    w.port.onmessage = m => {
+      if (m.data.includes("Error")) {
+        reject(m.data);
+        return;
+      }
+      resolve(m);
+    }
+    w.onerror = evt => {
+      reject(evt.message);
+    }
+  });
+}
+
 function testIframeChild(url) {
   let frame = document.createElement('iframe');
   frame.src = url;
@@ -115,6 +169,10 @@ function testURL(opts, url) {
     return testWorkerChild(url);
   }
 
+  if (opts.child === 'sharedworker') {
+    return testSharedWorkerChild(url);
+  }
+
   if (opts.child === 'iframe') {
     return testIframeChild(url);
   }
diff --git a/tests/wpt/tests/shadow-dom/declarative/gethtml.tentative.html b/tests/wpt/tests/shadow-dom/declarative/gethtml.tentative.html
index c48230c1701..eabd39131ba 100644
--- a/tests/wpt/tests/shadow-dom/declarative/gethtml.tentative.html
+++ b/tests/wpt/tests/shadow-dom/declarative/gethtml.tentative.html
@@ -69,29 +69,28 @@ function testElementType(allowsShadowDom, elementType, runGetHTMLOnShadowRoot, d
       const emptyElement = `<${elementType}></${elementType}>`;
       if (isOpen) {
         if (expectedSerializable) {
-          assert_equals(wrapper.getHTML({includeShadowRoots: true}), correctHtml);
+          assert_equals(wrapper.getHTML({serializableShadowRoots: true}), correctHtml);
         } else {
-          assert_equals(wrapper.getHTML({includeShadowRoots: true}), emptyElement);
+          assert_equals(wrapper.getHTML({serializableShadowRoots: true}), emptyElement);
         }
       } else {
         // Closed shadow roots should not be returned unless shadowRoots specifically contains the shadow root:
-        assert_equals(wrapper.getHTML({includeShadowRoots: true}), emptyElement);
-        assert_equals(wrapper.getHTML({includeShadowRoots: true, shadowRoots: []}), emptyElement);
+        assert_equals(wrapper.getHTML({serializableShadowRoots: true}), emptyElement);
+        assert_equals(wrapper.getHTML({serializableShadowRoots: true, shadowRoots: []}), emptyElement);
       }
-      // If we provide the shadow root, serialize it, regardless of includeShadowRoots.
-      assert_equals(wrapper.getHTML({includeShadowRoots: true, shadowRoots: [shadowRoot]}),correctHtml);
+      // If we provide the shadow root, serialize it, regardless of serializableShadowRoots.
+      assert_equals(wrapper.getHTML({serializableShadowRoots: true, shadowRoots: [shadowRoot]}),correctHtml);
+      assert_equals(wrapper.getHTML({serializableShadowRoots: false, shadowRoots: [shadowRoot]}),correctHtml);
       assert_equals(wrapper.getHTML({shadowRoots: [shadowRoot]}),correctHtml);
-      // This should always throw - includeShadowRoots false, but we've provided roots.
-      assert_throws_dom("NotSupportedError",() => wrapper.getHTML({includeShadowRoots: false, shadowRoots: [shadowRoot]}));
     } else {
       // For non-shadow hosts, getHTML() should also match .innerHTML
-      assert_equals(wrapper.getHTML({includeShadowRoots: true}),wrapper.innerHTML);
+      assert_equals(wrapper.getHTML({serializableShadowRoots: true}),wrapper.innerHTML);
     }
 
-    // Either way, make sure getHTML({includeShadowRoots: false}) matches .innerHTML
-    assert_equals(wrapper.getHTML({includeShadowRoots: false}),wrapper.innerHTML,'getHTML() with includeShadowRoots false should return the same as .innerHTML');
-    // ...and that the default for includeShadowRoots is false.
-    assert_equals(wrapper.getHTML(),wrapper.innerHTML,'The default for includeShadowRoots should be false');
+    // Either way, make sure getHTML({serializableShadowRoots: false}) matches .innerHTML
+    assert_equals(wrapper.getHTML({serializableShadowRoots: false}),wrapper.innerHTML,'getHTML() with serializableShadowRoots false should return the same as .innerHTML');
+    // ...and that the default for serializableShadowRoots is false.
+    assert_equals(wrapper.getHTML(),wrapper.innerHTML,'The default for serializableShadowRoots should be false');
 
   }, `${runGetHTMLOnShadowRoot ? 'ShadowRoot' : 'Element'}.getHTML() on <${elementType}>${allowsShadowDom ? `, with ${declarativeShadowDom ? 'declarative' : 'imperative'} shadow, mode=${mode}, delegatesFocus=${delegatesFocus}, serializable=${serializable}, clonable=${clonable}.` : ''}`);
 }
diff --git a/tests/wpt/tests/shared-storage/setters-long-string.tentative.https.sub.html b/tests/wpt/tests/shared-storage/setters-long-string.tentative.https.sub.html
new file mode 100644
index 00000000000..69b66a53a0d
--- /dev/null
+++ b/tests/wpt/tests/shared-storage/setters-long-string.tentative.https.sub.html
@@ -0,0 +1,44 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+'use strict';
+
+promise_test(async t => {
+  try {
+    await sharedStorage.set('a'.repeat(2621441), 'b');
+  } catch (e) {
+    assert_equals(e.name, 'DataError');
+    return;
+  }
+  assert_unreached("did not reject");
+}, 'sharedStorage.set with key length too big');
+
+promise_test(async t => {
+  try {
+    await sharedStorage.set('a', 'b'.repeat(2621441));
+  } catch (e) {
+    assert_equals(e.name, 'DataError');
+    return;
+  }
+  assert_unreached("did not reject");
+}, 'sharedStorage.set with value length too big');
+
+promise_test(() => {
+  return sharedStorage.set('a'.repeat(2621440), '').then(() => {
+    // Clean up.
+    sharedStorage.delete('a'.repeat(2621440));
+  });
+}, 'sharedStorage.set with max allowed key length');
+
+promise_test(() => {
+  return sharedStorage.set('a', 'b'.repeat(2621439)).then(() => {
+    // Clean up.
+    sharedStorage.delete('a');
+  });
+}, 'sharedStorage.set with max allowed value length');
+
+</script>
+</body>
diff --git a/tests/wpt/tests/shared-storage/setters.tentative.https.sub.html b/tests/wpt/tests/shared-storage/setters.tentative.https.sub.html
index ffc4bfbd7d5..891f8a7acb5 100644
--- a/tests/wpt/tests/shared-storage/setters.tentative.https.sub.html
+++ b/tests/wpt/tests/shared-storage/setters.tentative.https.sub.html
@@ -26,10 +26,6 @@ promise_test(async t => {
   return promise_rejects_js(t, TypeError, sharedStorage.set("a", "b", "c"));
 }, 'sharedStorage.set with invalid options');
 
-promise_test(() => {
-  return sharedStorage.set('a'.repeat(1024), 'b'.repeat(1024));
-}, 'sharedStorage.set with max allowed key and value length');
-
 promise_test(async t => {
   try {
       await sharedStorage.set('', 'b');
@@ -40,26 +36,6 @@ promise_test(async t => {
   assert_unreached("did not reject");
 }, 'sharedStorage.set with empty key');
 
-promise_test(async t => {
-  try {
-      await sharedStorage.set('a'.repeat(1025), 'b');
-  } catch (e) {
-    assert_equals(e.name, 'DataError');
-    return;
-  }
-  assert_unreached("did not reject");
-}, 'sharedStorage.set with key length too big');
-
-promise_test(async t => {
-  try {
-      await sharedStorage.set('a', 'b'.repeat(1025));
-  } catch (e) {
-    assert_equals(e.name, 'DataError');
-    return;
-  }
-  assert_unreached("did not reject");
-}, 'sharedStorage.set with value length too big');
-
 promise_test(() => {
   return sharedStorage.append("a", "b");
 }, 'sharedStorage.append');
diff --git a/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html b/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
index d4828fca51b..5024052eb46 100644
--- a/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
+++ b/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
@@ -15,7 +15,8 @@
 <meta name="variant" content="?4-4">
 <meta name="variant" content="?5-5">
 <meta name="variant" content="?6-6">
-<meta name="variant" content="?7-last">
+<meta name="variant" content="?7-7">
+<meta name="variant" content="?8-last">
 
 <script>
 "use strict";
@@ -58,8 +59,7 @@ subsetTest(promise_test, async t => {
   await agent.setReferrerPolicy("unsafe-url");
 
   const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
-  await agent.forceSinglePrefetch(
-      nextURL, { referrer_policy: "no-referrer", requires: ["anonymous-client-ip-when-cross-origin"] });
+  await agent.forceSinglePrefetch(nextURL, { referrer_policy: "no-referrer" });
   await agent.navigate(nextURL);
 
   // This referring page's referrer policy would not be eligible for
@@ -82,6 +82,25 @@ subsetTest(promise_test, async t => {
   assert_not_prefetched(headers, "must not be prefetched");
 }, 'unrecognized policies invalidate the rule');
 
+subsetTest(promise_test, async t => {
+  const agent = await spawnWindow(t);
+  await agent.setReferrerPolicy("strict-origin");
+  const expectedReferrer = agent.getExecutorURL().origin + "/";
+
+  const nextURL = agent.getExecutorURL({ page: 2 });
+  await agent.execute_script((url) => {
+    const a = addLink(url);
+    a.referrerPolicy = 'no-referrrrrrrer';
+    insertDocumentRule();
+  }, [nextURL]);
+  await new Promise(resolve => t.step_timeout(resolve, 2000));
+  await agent.navigate(nextURL);
+
+  const headers = await agent.getRequestHeaders();
+  assert_prefetched(headers, "must be prefetched");
+  assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
+}, 'unrecognized policies in link referrerpolicy attribute are ignored');
+
 subsetTest(promise_test, async t => {
   const agent = await spawnWindow(t);
   await agent.setReferrerPolicy("strict-origin-when-cross-origin");
@@ -100,8 +119,7 @@ subsetTest(promise_test, async t => {
   const expectedReferrer = agent.getExecutorURL().origin + "/";
 
   const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
-  await agent.forceSinglePrefetch(
-      nextURL, { referrer_policy: "unsafe-url", requires: ["anonymous-client-ip-when-cross-origin"] });
+  await agent.forceSinglePrefetch(nextURL, { referrer_policy: "unsafe-url" });
   await agent.navigate(nextURL);
 
   // This referring page's referrer policy would normally make it eligible for
diff --git a/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-not-accepted.https.html b/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-not-accepted.https.html
index d8c2bea87a0..8cb7388479b 100644
--- a/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-not-accepted.https.html
+++ b/tests/wpt/tests/speculation-rules/prefetch/referrer-policy-not-accepted.https.html
@@ -10,7 +10,8 @@
 
 <!--Split test cases due to the use of timeouts in speculation rules test utilities.-->
 <meta name="variant" content="?1-1">
-<meta name="variant" content="?2-last">
+<meta name="variant" content="?2-2">
+<meta name="variant" content="?3-last">
 
 <script>
 "use strict";
@@ -39,12 +40,30 @@ subsetTest(promise_test, async t => {
 
   const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
   // This prefetch attempt should be ignored.
-  await agent.forceSinglePrefetch(
-      nextURL, { requires: ["anonymous-client-ip-when-cross-origin"] });
+  await agent.forceSinglePrefetch(nextURL);
   await agent.navigate(nextURL);
 
   const headers = await agent.getRequestHeaders();
   assert_not_prefetched(headers, "must not be prefetched");
   assert_equals(headers.referer, expectedReferrer, "must send the full URL as the referrer");
 }, 'with "unsafe-url" referrer policy on cross-site referring page');
+
+subsetTest(promise_test, async t => {
+  const agent = await spawnWindow(t);
+  await agent.setReferrerPolicy("unsafe-url");
+  const expectedReferrer = agent.getExecutorURL().href;
+
+  const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
+  // This prefetch attempt should be ignored.
+  await agent.execute_script((url) => {
+    addLink(url);
+    insertDocumentRule();
+  }, [nextURL]);
+  await new Promise(resolve => t.step_timeout(resolve, 2000));
+  await agent.navigate(nextURL);
+
+  const headers = await agent.getRequestHeaders();
+  assert_not_prefetched(headers, "must not be prefetched");
+  assert_equals(headers.referer, expectedReferrer, "must send the full URL as the referrer");
+}, 'with "unsafe-url" referrer policy on cross-site referring page with document rule');
 </script>
diff --git a/tests/wpt/tests/speculation-rules/prefetch/resources/ruleset.py b/tests/wpt/tests/speculation-rules/prefetch/resources/ruleset.py
index 97de1cc1a01..5b6ac87aed5 100644
--- a/tests/wpt/tests/speculation-rules/prefetch/resources/ruleset.py
+++ b/tests/wpt/tests/speculation-rules/prefetch/resources/ruleset.py
@@ -28,8 +28,7 @@ def main(request, response):
         "prefetch": [
           {{
             "source":"list",
-            "urls":["{url}?uuid={uuid}&page={page}&str={strparam}"],
-            "requires":["anonymous-client-ip-when-cross-origin"]
+            "urls":["{url}?uuid={uuid}&page={page}&str={strparam}"]
           }}
         ]
       }}
diff --git a/tests/wpt/tests/svg/historical.html b/tests/wpt/tests/svg/historical.html
index 47935c64616..ed455ae2480 100644
--- a/tests/wpt/tests/svg/historical.html
+++ b/tests/wpt/tests/svg/historical.html
@@ -65,6 +65,9 @@ var removedMembers = {
     "xmllang",
     "xmlspace"
   ],
+  "SVGAElement": [
+    "text"
+  ],
   "SVGGraphicsElement": [
     "farthestViewportElement",
     "getTransformToElement",
diff --git a/tests/wpt/tests/svg/idlharness.window.js b/tests/wpt/tests/svg/idlharness.window.js
index 04cf99729e4..a26fa2bef6d 100644
--- a/tests/wpt/tests/svg/idlharness.window.js
+++ b/tests/wpt/tests/svg/idlharness.window.js
@@ -42,9 +42,9 @@ const elements = [
   'script',
   'animate',
   'set',
+  'discard',
   'animateMotion',
   'mpath',
-  'animateColor',
   'animateTransform',
   'metadata',
   'foreignObject',
@@ -167,10 +167,10 @@ idl_test(
       SVGViewElement: ['objects.view'],
       SVGScriptElement: ['objects.script'],
       SVGAnimateElement: ['objects.animate'],
+      SVGDiscardElement: ['objects.discard'],
       SVGSetElement: ['objects.set'],
       SVGAnimateMotionElement: ['objects.animateMotion'],
       SVGMPathElement: ['objects.mpath'],
-      SVGAnimateColorElement: ['objects.animateColor'],
       SVGAnimateTransformElement: ['objects.animateTransform'],
       SVGMetadataElement: ['objects.metadata'],
       SVGForeignObjectElement: ['objects.foreignObject'],
diff --git a/tests/wpt/tests/svg/interact/scripted/async-02.html b/tests/wpt/tests/svg/interact/scripted/async-02.html
new file mode 100644
index 00000000000..c11fa9f33ff
--- /dev/null
+++ b/tests/wpt/tests/svg/interact/scripted/async-02.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <title>Inline async module script without external deps onload blocking</title>
+    <link rel="help" href="https://svgwg.org/svg2-draft/interact.html#ScriptElement"/>
+    <meta name=timeout content=long>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <svg>
+      <script>
+        let loadFired = false;
+        let moduleRan = false
+        let test = async_test("Inline async module script vs. onload");
+        window.addEventListener("load", test.step_func(function() {
+          loadFired = true;
+          assert_true(moduleRan, "Module should have run before the load event");
+          test.step_timeout(function() {
+            test.done();
+          }, 0);
+        }));
+      </script>
+      <script type="module" async>
+        moduleRan = true;
+        test.step_func(function() {
+          assert_false(loadFired, "onload should not have fired yet");
+        });
+      </script>
+    </svg>
+  </body>
+</html>
diff --git a/tests/wpt/tests/svg/interact/scripted/async-03.html b/tests/wpt/tests/svg/interact/scripted/async-03.html
new file mode 100644
index 00000000000..fb8ee6d0ded
--- /dev/null
+++ b/tests/wpt/tests/svg/interact/scripted/async-03.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <title>Inline async script without external deps onload blocking</title>
+    <link rel="help" href="https://svgwg.org/svg2-draft/interact.html#ScriptElement"/>
+    <meta name=timeout content=long>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <svg>
+      <script>
+        let loadFired = false;
+        let asyncRan = false
+        let test = async_test("Inline async script vs. onload");
+        window.addEventListener("load", test.step_func(function() {
+          loadFired = true;
+          assert_true(asyncRan, "Async should have run before the load event");
+          test.step_timeout(function() {
+            test.done();
+          }, 0);
+        }));
+      </script>
+      <script async>
+        asyncRan = true;
+        test.step_func(function() {
+          assert_false(loadFired, "onload should not have fired yet");
+        });
+      </script>
+    </svg>
+  </body>
+</html>
diff --git a/tests/wpt/tests/svg/interact/scripted/defer-02.html b/tests/wpt/tests/svg/interact/scripted/defer-02.html
new file mode 100644
index 00000000000..0fcebae0ae7
--- /dev/null
+++ b/tests/wpt/tests/svg/interact/scripted/defer-02.html
@@ -0,0 +1,32 @@
+<html>
+  <head>
+    <title>Inline defer module script without external deps onload blocking</title>
+    <link rel="help" href="https://svgwg.org/svg2-draft/interact.html#ScriptElement"/>
+    <meta name=timeout content=long>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <svg>
+      <script>
+        let loadFired = false;
+        let moduleRan = false
+        let test = async_test("Inline defer module script vs. onload");
+        window.addEventListener("load", test.step_func(function() {
+          loadFired = true;
+          assert_true(moduleRan, "Module should have run before the load event");
+          test.step_timeout(function() {
+            test.done();
+          }, 0);
+        }));
+      </script>
+      <!-- defer should be equivalent to neither defer nor async specified -->
+      <script type="module" defer>
+        moduleRan = true;
+        test.step_func(function() {
+          assert_false(loadFired, "onload should not have fired yet");
+        });
+      </script>
+    </svg>
+  </body>
+</html>
diff --git a/tests/wpt/tests/svg/interact/scripted/module-02.html b/tests/wpt/tests/svg/interact/scripted/module-02.html
new file mode 100644
index 00000000000..8a6d6ac3f61
--- /dev/null
+++ b/tests/wpt/tests/svg/interact/scripted/module-02.html
@@ -0,0 +1,31 @@
+<html>
+  <head>
+    <title>Inline module script without external deps onload blocking</title>
+    <link rel="help" href="https://svgwg.org/svg2-draft/interact.html#ScriptElement"/>
+    <meta name=timeout content=long>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <svg>
+      <script>
+        let loadFired = false;
+        let moduleRan = false
+        let test = async_test("Inline module script vs. onload");
+        window.addEventListener("load", test.step_func(function() {
+          loadFired = true;
+          assert_true(moduleRan, "Module should have run before the load event");
+          test.step_timeout(function() {
+            test.done();
+          }, 0);
+        }));
+      </script>
+      <script type="module">
+        moduleRan = true;
+        test.step_func(function() {
+          assert_false(loadFired, "onload should not have fired yet");
+        });
+      </script>
+    </svg>
+  </body>
+</html>
diff --git a/tests/wpt/tests/svg/linking/scripted/a.text-getter-01.svg b/tests/wpt/tests/svg/linking/scripted/a.text-getter-01.svg
deleted file mode 100644
index d0b26f2042e..00000000000
--- a/tests/wpt/tests/svg/linking/scripted/a.text-getter-01.svg
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg xmlns="http://www.w3.org/2000/svg"
-     xmlns:h="http://www.w3.org/1999/xhtml">
-  <title>SVGAElement.text getting</title>
-  <metadata>
-    <h:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#InterfaceSVGAElement"/>
-  </metadata>
-  <script>var b</script>
-  <g id="test">
-    <a href="a">a b c </a>
-    <a href="b">a <!--b-->b c </a>
-    <a href="c">a <b>b</b> c </a>
-    <a href="d">a <script>b</script> c </a>
-    <script><![CDATA[
-        var e = document.getElementById("test")
-                        .appendChild(document.createElementNS("http://www.w3.org/2000/svg","a"));
-        e.href.baseVal = "d";
-        e.appendChild(document.createTextNode("a "));
-        e.appendChild(document.createTextNode("b "));
-        e.appendChild(document.createTextNode("c "));
-    ]]></script>
-  </g>
-  <h:script src="/resources/testharness.js"/>
-  <h:script src="/resources/testharnessreport.js"/>
-  <script><![CDATA[
-    test(function() {
-        var list = document.getElementById("test")
-                            .getElementsByTagName("a");
-        for (var i = 0, il = list.length; i < il; ++i) {
-            test(function() {
-                assert_equals(list[i].text, list[i].textContent);
-                assert_equals(list[i].text, "a b c ");
-            }, "Test for anchor " + i);
-        }
-    });
-  ]]></script>
-</svg>
\ No newline at end of file
diff --git a/tests/wpt/tests/svg/linking/scripted/a.text-setter-01.svg b/tests/wpt/tests/svg/linking/scripted/a.text-setter-01.svg
deleted file mode 100644
index 53ad8fce9a6..00000000000
--- a/tests/wpt/tests/svg/linking/scripted/a.text-setter-01.svg
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg xmlns="http://www.w3.org/2000/svg"
-     xmlns:h="http://www.w3.org/1999/xhtml">
-  <title>SVGAElement.text setting</title>
-  <metadata>
-    <h:link rel="help" href="https://svgwg.org/svg2-draft/linking.html#InterfaceSVGAElement"/>
-  </metadata>
-  <g id="test">
-    <a href="a">a b c</a>
-    <a href="b">a <!--b--> c</a>
-    <a href="c">a <b>b</b> c</a>
-    <script><![CDATA[
-        var d = document.getElementById("test")
-                        .appendChild(document.createElementNS("http://www.w3.org/2000/svg","a"));
-        d.href.baseVal = "d";
-        d.appendChild(document.createTextNode("a "));
-        d.appendChild(document.createTextNode("b "));
-        d.appendChild(document.createTextNode("c "));
-    ]]></script>
-  </g>
-  <h:script src="/resources/testharness.js"/>
-  <h:script src="/resources/testharnessreport.js"/>
-  <script><![CDATA[
-    test(function() {
-        var list = document.getElementById("test")
-                            .getElementsByTagName("a");
-        for (var i = 0, il = list.length; i < il; ++i) {
-            test(function() {
-                list[i].text = "x";
-                assert_equals(list[i].text, "x");
-                assert_equals(list[i].textContent, "x");
-                assert_equals(list[i].firstChild.data, "x");
-                assert_equals(list[i].childNodes.length, 1);
-
-                list[i].textContent = "y";
-                assert_equals(list[i].text, "y");
-                assert_equals(list[i].textContent, "y");
-                assert_equals(list[i].firstChild.data, "y");
-                assert_equals(list[i].childNodes.length, 1);
-            }, "Test for anchor " + i);
-        }
-    });
-  ]]></script>
-</svg>
\ No newline at end of file
diff --git a/tests/wpt/tests/svg/painting/reftests/paint-order-002-ref.svg b/tests/wpt/tests/svg/painting/reftests/paint-order-002-ref.svg
new file mode 100644
index 00000000000..372e53e463b
--- /dev/null
+++ b/tests/wpt/tests/svg/painting/reftests/paint-order-002-ref.svg
@@ -0,0 +1,61 @@
+<svg viewBox="-10 -10 280 220" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <marker id="m" refX="5" refY="5" viewBox="0 0 10 10" overflow="visible">
+      <circle cx="5" cy="5" r="3" fill="black" stroke="black" fill-opacity="0.5"/>
+    </marker>
+    <svg id="poly" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke="lime" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+    </svg>
+    <svg id="poly-f-m-s" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke="lime" stroke-width="50" stroke-opacity="0.5"/>
+    </svg>
+    <svg id="poly-m-f-s" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke-width="50" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke="lime" stroke-width="50" stroke-opacity="0.5"/>
+    </svg>
+    <svg id="poly-s-m-f" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke="lime" stroke-width="50" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke-width="50" stroke-opacity="0.5"/>
+    </svg>
+    <svg id="poly-s-f-m" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke="lime" stroke-width="50" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke-width="50" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+    </svg>
+    <svg id="poly-m-s-f" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="none" stroke="lime" stroke-width="50" stroke-opacity="0.5"/>
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke-width="50" stroke-opacity="0.5"/>
+    </svg>
+  </defs>
+
+  <use xlink:href="#poly" width="50" height="50"/>
+  <use xlink:href="#poly" width="50" height="50" x="50"/>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#poly" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-f-m-s" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-f-m-s" width="50" height="50" x="200" />
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="0"/>
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="50"/>
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-s-m-f" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-s-m-f" width="50" height="50" x="200"/>
+  </g>
+
+  <g transform="translate(0,150)">
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="0"/>
+    <use xlink:href="#poly-m-s-f" width="50" height="50" x="50"/>
+    <use xlink:href="#poly-m-s-f" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="200"/>
+  </g>
+</svg>
diff --git a/tests/wpt/tests/svg/painting/reftests/paint-order-002.svg b/tests/wpt/tests/svg/painting/reftests/paint-order-002.svg
new file mode 100644
index 00000000000..a9bf7d01fc7
--- /dev/null
+++ b/tests/wpt/tests/svg/painting/reftests/paint-order-002.svg
@@ -0,0 +1,39 @@
+<svg viewBox="-10 -10 280 220" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
+     xmlns:h="http://www.w3.org/1999/xhtml">
+  <h:link rel="match" href="paint-order-002-ref.svg"/>
+  <defs>
+    <marker id="m" refX="5" refY="5" viewBox="0 0 10 10" overflow="visible">
+      <circle cx="5" cy="5" r="3" fill="black" stroke="black" fill-opacity="0.5"/>
+    </marker>
+    <svg id="poly" viewBox="-10 -10 420 420">
+      <polygon points="50 50 50 350 350 350 250 200" fill="blue" stroke="lime" stroke-width="50" style="marker: url(#m)" stroke-opacity="0.5"/>
+    </svg>
+  </defs>
+
+  <use xlink:href="#poly" width="50" height="50"/>
+  <use xlink:href="#poly" style="paint-order: normal" width="50" height="50" x="50"/>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#poly" style="paint-order: fill" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: fill stroke" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: fill stroke markers" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: fill markers" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: fill markers stroke" width="50" height="50" x="200" />
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#poly" style="paint-order: stroke" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: stroke fill" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: stroke fill markers" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: stroke markers" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: stroke markers fill" width="50" height="50" x="200"/>
+  </g>
+
+  <g transform="translate(0,150)">
+    <use xlink:href="#poly" style="paint-order: markers" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: markers stroke" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: markers stroke fill" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: markers fill" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: markers fill stroke" width="50" height="50" x="200"/>
+  </g>
+</svg>
diff --git a/tests/wpt/tests/svg/painting/reftests/paint-order-003-ref.svg b/tests/wpt/tests/svg/painting/reftests/paint-order-003-ref.svg
new file mode 100644
index 00000000000..6abc0c76af8
--- /dev/null
+++ b/tests/wpt/tests/svg/painting/reftests/paint-order-003-ref.svg
@@ -0,0 +1,61 @@
+<svg viewBox="-10 -10 280 220" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <marker id="m" refX="5" refY="5" viewBox="0 0 10 10" overflow="visible">
+      <circle cx="5" cy="5" r="3" fill="black" stroke="black" fill-opacity="0.5"/>
+    </marker>
+    <svg id="poly" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke="lime" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+    </svg>
+    <svg id="poly-f-m-s" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke="lime" stroke-width="10" stroke-opacity="0.5">test</text>
+    </svg>
+    <svg id="poly-m-f-s" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke-width="10" stroke-opacity="0.5">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke="lime" stroke-width="10" stroke-opacity="0.5">test</text>
+    </svg>
+    <svg id="poly-s-m-f" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke="lime" stroke-width="10" stroke-opacity="0.5">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke-width="10" stroke-opacity="0.5">test</text>
+    </svg>
+    <svg id="poly-s-f-m" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke="lime" stroke-width="10" stroke-opacity="0.5">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke-width="10" stroke-opacity="0.5">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+    </svg>
+    <svg id="poly-m-s-f" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="none" stroke="lime" stroke-width="10" stroke-opacity="0.5">test</text>
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke-width="10" stroke-opacity="0.5">test</text>
+    </svg>
+  </defs>
+
+  <use xlink:href="#poly" width="50" height="50"/>
+  <use xlink:href="#poly" width="50" height="50" x="50"/>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#poly" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-f-m-s" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-f-m-s" width="50" height="50" x="200" />
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="0"/>
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="50"/>
+    <use xlink:href="#poly-s-f-m" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-s-m-f" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-s-m-f" width="50" height="50" x="200"/>
+  </g>
+
+  <g transform="translate(0,150)">
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="0"/>
+    <use xlink:href="#poly-m-s-f" width="50" height="50" x="50"/>
+    <use xlink:href="#poly-m-s-f" width="50" height="50" x="100"/>
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="150"/>
+    <use xlink:href="#poly-m-f-s" width="50" height="50" x="200"/>
+  </g>
+</svg>
diff --git a/tests/wpt/tests/svg/painting/reftests/paint-order-003.svg b/tests/wpt/tests/svg/painting/reftests/paint-order-003.svg
new file mode 100644
index 00000000000..f1962600744
--- /dev/null
+++ b/tests/wpt/tests/svg/painting/reftests/paint-order-003.svg
@@ -0,0 +1,39 @@
+<svg viewBox="-10 -10 280 220" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
+     xmlns:h="http://www.w3.org/1999/xhtml">
+  <h:link rel="match" href="paint-order-003-ref.svg"/>
+  <defs>
+    <marker id="m" refX="5" refY="5" viewBox="0 0 10 10" overflow="visible">
+      <circle cx="5" cy="5" r="3" fill="black" stroke="black" fill-opacity="0.5"/>
+    </marker>
+    <svg id="poly" viewBox="-10 -10 420 420">
+      <text y="300" font-family="sans-serif" font-size="200" fill="blue" stroke="lime" stroke-width="10" stroke-opacity="0.5" style="marker: url(#m)">test</text>
+    </svg>
+  </defs>
+
+  <use xlink:href="#poly" width="50" height="50"/>
+  <use xlink:href="#poly" style="paint-order: normal" width="50" height="50" x="50"/>
+
+  <g transform="translate(0,50)">
+    <use xlink:href="#poly" style="paint-order: fill" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: fill stroke" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: fill stroke markers" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: fill markers" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: fill markers stroke" width="50" height="50" x="200" />
+  </g>
+
+  <g transform="translate(0,100)">
+    <use xlink:href="#poly" style="paint-order: stroke" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: stroke fill" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: stroke fill markers" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: stroke markers" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: stroke markers fill" width="50" height="50" x="200"/>
+  </g>
+
+  <g transform="translate(0,150)">
+    <use xlink:href="#poly" style="paint-order: markers" width="50" height="50" x="0"/>
+    <use xlink:href="#poly" style="paint-order: markers stroke" width="50" height="50" x="50"/>
+    <use xlink:href="#poly" style="paint-order: markers stroke fill" width="50" height="50" x="100"/>
+    <use xlink:href="#poly" style="paint-order: markers fill" width="50" height="50" x="150"/>
+    <use xlink:href="#poly" style="paint-order: markers fill stroke" width="50" height="50" x="200"/>
+  </g>
+</svg>
diff --git a/tests/wpt/tests/svg/rendering/order/clip-path-filter-order-ref.svg b/tests/wpt/tests/svg/render/order/clip-path-filter-order-ref.svg
similarity index 100%
rename from tests/wpt/tests/svg/rendering/order/clip-path-filter-order-ref.svg
rename to tests/wpt/tests/svg/render/order/clip-path-filter-order-ref.svg
diff --git a/tests/wpt/tests/svg/rendering/order/clip-path-filter-order.svg b/tests/wpt/tests/svg/render/order/clip-path-filter-order.svg
similarity index 100%
rename from tests/wpt/tests/svg/rendering/order/clip-path-filter-order.svg
rename to tests/wpt/tests/svg/render/order/clip-path-filter-order.svg
diff --git a/tests/wpt/tests/svg/rendering/order/z-index-ref.svg b/tests/wpt/tests/svg/render/order/z-index-ref.svg
similarity index 100%
rename from tests/wpt/tests/svg/rendering/order/z-index-ref.svg
rename to tests/wpt/tests/svg/render/order/z-index-ref.svg
diff --git a/tests/wpt/tests/svg/rendering/order/z-index.svg b/tests/wpt/tests/svg/render/order/z-index.svg
similarity index 100%
rename from tests/wpt/tests/svg/rendering/order/z-index.svg
rename to tests/wpt/tests/svg/render/order/z-index.svg
diff --git a/tests/wpt/tests/svg/color-inherit-link-visited-ref.svg b/tests/wpt/tests/svg/styling/color-inherit-link-visited-ref.svg
similarity index 100%
rename from tests/wpt/tests/svg/color-inherit-link-visited-ref.svg
rename to tests/wpt/tests/svg/styling/color-inherit-link-visited-ref.svg
diff --git a/tests/wpt/tests/svg/color-inherit-link-visited.svg b/tests/wpt/tests/svg/styling/color-inherit-link-visited.svg
similarity index 100%
rename from tests/wpt/tests/svg/color-inherit-link-visited.svg
rename to tests/wpt/tests/svg/styling/color-inherit-link-visited.svg
diff --git a/tests/wpt/tests/tools/manifest/sourcefile.py b/tests/wpt/tests/tools/manifest/sourcefile.py
index 23aa7f491fc..71eab54beae 100644
--- a/tests/wpt/tests/tools/manifest/sourcefile.py
+++ b/tests/wpt/tests/tools/manifest/sourcefile.py
@@ -70,6 +70,7 @@ def read_script_metadata(f: BinaryIO, regexp: Pattern[bytes]) -> Iterable[Tuple[
 
 _any_variants: Dict[Text, Dict[Text, Any]] = {
     "window": {"suffix": ".any.html"},
+    "window-module": {},
     "serviceworker": {"force_https": True},
     "serviceworker-module": {"force_https": True},
     "sharedworker": {},
diff --git a/tests/wpt/tests/tools/serve/serve.py b/tests/wpt/tests/tools/serve/serve.py
index 116a98c0fcd..300f8270a64 100644
--- a/tests/wpt/tests/tools/serve/serve.py
+++ b/tests/wpt/tests/tools/serve/serve.py
@@ -315,6 +315,20 @@ class WindowHandler(HtmlWrapperHandler):
 """
 
 
+class WindowModulesHandler(HtmlWrapperHandler):
+    global_type = "window-module"
+    path_replace = [(".any.window-module.html", ".any.js")]
+    wrapper = """<!doctype html>
+<meta charset=utf-8>
+%(meta)s
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+%(script)s
+<div id=log></div>
+<script type=module src="%(path)s"></script>
+"""
+
+
 class AnyHtmlHandler(HtmlWrapperHandler):
     global_type = "window"
     path_replace = [(".any.html", ".any.js")]
@@ -577,6 +591,7 @@ class RoutesBuilder:
             ("GET", "*.any.serviceworker.html", ServiceWorkersHandler),
             ("GET", "*.any.serviceworker-module.html", ServiceWorkerModulesHandler),
             ("GET", "*.any.shadowrealm.html", ShadowRealmHandler),
+            ("GET", "*.any.window-module.html", WindowModulesHandler),
             ("GET", "*.any.worker.js", ClassicWorkerHandler),
             ("GET", "*.any.worker-module.js", ModuleWorkerHandler),
             ("GET", "*.asis", handlers.AsIsHandler),
@@ -585,6 +600,7 @@ class RoutesBuilder:
             ("*", "/.well-known/attribution-reporting/report-aggregate-attribution", handlers.PythonScriptHandler),
             ("*", "/.well-known/attribution-reporting/debug/report-aggregate-attribution", handlers.PythonScriptHandler),
             ("*", "/.well-known/attribution-reporting/debug/verbose", handlers.PythonScriptHandler),
+            ("GET", "/.well-known/interest-group/permissions/", handlers.PythonScriptHandler),
             ("*", "/.well-known/private-aggregation/*", handlers.PythonScriptHandler),
             ("*", "/.well-known/web-identity", handlers.PythonScriptHandler),
             ("*", "*.py", handlers.PythonScriptHandler),
diff --git a/tests/wpt/tests/tools/webdriver/webdriver/bidi/client.py b/tests/wpt/tests/tools/webdriver/webdriver/bidi/client.py
index 73bba55791b..045bc048c4b 100644
--- a/tests/wpt/tests/tools/webdriver/webdriver/bidi/client.py
+++ b/tests/wpt/tests/tools/webdriver/webdriver/bidi/client.py
@@ -205,7 +205,7 @@ class BidiSession:
             if not listeners:
                 listeners = self.event_listeners.get(None, [])
             for listener in listeners:
-                await listener(data["method"], data["params"])
+                asyncio.create_task(listener(data["method"], data["params"]))
         else:
             raise ValueError(f"Unexpected message: {data!r}")
 
diff --git a/tests/wpt/tests/tools/webdriver/webdriver/bidi/error.py b/tests/wpt/tests/tools/webdriver/webdriver/bidi/error.py
index 42361ca90b9..bb3bd4d7fca 100644
--- a/tests/wpt/tests/tools/webdriver/webdriver/bidi/error.py
+++ b/tests/wpt/tests/tools/webdriver/webdriver/bidi/error.py
@@ -95,6 +95,10 @@ class UnableToSetCookieException(BidiException):
     error_code = "unable to set cookie"
 
 
+class UnableToSetFileInputException(BidiException):
+    error_code = "unable to set file input"
+
+
 class UnderspecifiedStoragePartitionException(BidiException):
     error_code = "underspecified storage partition"
 
diff --git a/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/input.py b/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/input.py
index b2703843b18..ee4f8136e9d 100644
--- a/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/input.py
+++ b/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/input.py
@@ -410,6 +410,17 @@ class Input(BidiModule):
         params: MutableMapping[str, Any] = {"context": context}
         return params
 
+    @command
+    def set_files(
+        self, context: str, element: Any, files: List[str]
+    ) -> Mapping[str, Any]:
+        params: MutableMapping[str, Any] = {
+            "context": context,
+            "element": element,
+            "files": files,
+        }
+        return params
+
 
 def get_element_origin(element: Any) -> Mapping[str, Any]:
     return {"type": "element", "element": {"sharedId": element["sharedId"]}}
diff --git a/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/network.py b/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/network.py
index 30daa4c48ba..8bc51334d2d 100644
--- a/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/network.py
+++ b/tests/wpt/tests/tools/webdriver/webdriver/bidi/modules/network.py
@@ -208,20 +208,30 @@ class Network(BidiModule):
     def provide_response(
             self,
             request: str,
+            body: Optional[NetworkBytesValue] = None,
+            cookies: Optional[List[SetCookieHeader]] = None,
+            headers: Optional[List[Header]] = None,
             reason_phrase: Optional[str] = None,
             status_code: Optional[int] = None) -> Mapping[str, Any]:
         params: MutableMapping[str, Any] = {
             "request": request,
         }
 
+        if body is not None:
+            params["body"] = body
+
+        if cookies is not None:
+            params["cookies"] = cookies
+
+        if headers is not None:
+            params["headers"] = headers
+
         if reason_phrase is not None:
             params["reasonPhrase"] = reason_phrase
 
         if status_code is not None:
             params["statusCode"] = status_code
 
-        # TODO: Add support for missing parameters: body, cookies, headers
-
         return params
 
     @command
diff --git a/tests/wpt/tests/tools/wpt/android.py b/tests/wpt/tests/tools/wpt/android.py
index 89dc9fad25c..80c30c01039 100644
--- a/tests/wpt/tests/tools/wpt/android.py
+++ b/tests/wpt/tests/tools/wpt/android.py
@@ -17,9 +17,9 @@ here = os.path.abspath(os.path.dirname(__file__))
 wpt_root = os.path.abspath(os.path.join(here, os.pardir, os.pardir))
 
 
-NDK_VERSION = "r25c"
-CMDLINE_TOOLS_VERSION_STRING = "11.0"
-CMDLINE_TOOLS_VERSION = "9644228"
+NDK_VERSION = "r26c"
+CMDLINE_TOOLS_VERSION_STRING = "12.0"
+CMDLINE_TOOLS_VERSION = "11076708"
 
 AVD_MANIFEST_X86_64 = {
     "emulator_package": "system-images;android-24;default;x86_64",
diff --git a/tests/wpt/tests/tools/wptrunner/requirements_opera.txt b/tests/wpt/tests/tools/wptrunner/requirements_opera.txt
index 4ff0fedd321..db0c5dd9923 100644
--- a/tests/wpt/tests/tools/wptrunner/requirements_opera.txt
+++ b/tests/wpt/tests/tools/wptrunner/requirements_opera.txt
@@ -1,2 +1,2 @@
 mozprocess==1.3.1
-selenium==4.14.0
+selenium==4.18.1
diff --git a/tests/wpt/tests/tools/wptrunner/requirements_sauce.txt b/tests/wpt/tests/tools/wptrunner/requirements_sauce.txt
index 5538fb0672d..c9e42346ce4 100644
--- a/tests/wpt/tests/tools/wptrunner/requirements_sauce.txt
+++ b/tests/wpt/tests/tools/wptrunner/requirements_sauce.txt
@@ -1,2 +1,2 @@
-selenium==4.14.0
+selenium==4.18.1
 requests==2.31.0
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.py b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.py
new file mode 100644
index 00000000000..c235aeb58a8
--- /dev/null
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.py
@@ -0,0 +1,3 @@
+def main(request, response):
+    response.headers.set("Content-Type", "text/plain")
+    return "default"
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.sub.py b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.sub.py
new file mode 100644
index 00000000000..32a10d8535a
--- /dev/null
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultpy/default.sub.py
@@ -0,0 +1,3 @@
+def main(request, response):
+    response.headers.set("Content-Type", "text/plain")
+    return "default.sub"
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultsubpy/default.sub.py b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultsubpy/default.sub.py
new file mode 100644
index 00000000000..c549100066a
--- /dev/null
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/defaultsubpy/default.sub.py
@@ -0,0 +1,3 @@
+def main(request, response):
+    response.headers.set("Content-Type", "text/plain")
+    return "{{host}}"
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/docroot/foo.any.window-module.html b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/foo.any.window-module.html
new file mode 100644
index 00000000000..59646e6abdb
--- /dev/null
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/docroot/foo.any.window-module.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div id=log></div>
+<script type=module src="/foo.any.js"></script>
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/test_handlers.py b/tests/wpt/tests/tools/wptserve/tests/functional/test_handlers.py
index 623a0e5b6a8..91b05f4fe46 100644
--- a/tests/wpt/tests/tools/wptserve/tests/functional/test_handlers.py
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/test_handlers.py
@@ -275,6 +275,17 @@ class TestPythonHandler(TestUsingServer):
         self.assertEqual("text/plain", resp.info()["Content-Type"])
         self.assertEqual(b"PASS", resp.read())
 
+    def test_directory(self):
+        route = ("GET", "/defaultpy", wptserve.handlers.python_script_handler)
+        self.server.router.register(*route)
+        resp = self.request("/defaultpy")
+        self.assertEqual(200, resp.getcode())
+        self.assertEqual("text/plain", resp.info()["Content-Type"])
+        # default.py returns "default", default.sub.py returns "default.sub".
+        # Because this should find the first matching default*.py file
+        # lexicographically sorted, this should have gotten "default".
+        self.assertEqual(b"default", resp.read())
+
     def test_no_main(self):
         with pytest.raises(HTTPError) as cm:
             self.request("/no_main.py")
@@ -325,6 +336,15 @@ class TestAsIsHandler(TestUsingServer):
         self.assertEqual(b"Content", resp.read())
         #Add a check that the response is actually sane
 
+    def test_directory_fails(self):
+        route = ("GET", "/subdir", wptserve.handlers.as_is_handler)
+        self.server.router.register(*route)
+        with pytest.raises(HTTPError) as cm:
+            self.request("/subdir")
+
+        assert cm.value.code == 500
+        del cm
+
 
 class TestH2Handler(TestUsingH2Server):
     def test_handle_headers(self):
@@ -410,6 +430,12 @@ class TestWindowHandler(TestWrapperHandlerUsingServer):
         self.run_wrapper_test('foo.window.html',
                               'text/html', serve.WindowHandler)
 
+class TestWindowModulesHandler(TestWrapperHandlerUsingServer):
+    dummy_files = {'foo.any.js': b'// META: global=window-module\n'}
+
+    def test_any_window_module_html(self):
+        self.run_wrapper_test('foo.any.window-module.html',
+                              'text/html', serve.WindowModulesHandler)
 
 class TestAnyHtmlHandler(TestWrapperHandlerUsingServer):
     dummy_files = {'foo.any.js': b'',
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/test_pipes.py b/tests/wpt/tests/tools/wptserve/tests/functional/test_pipes.py
index beb124d1dbe..c11577acb50 100644
--- a/tests/wpt/tests/tools/wptserve/tests/functional/test_pipes.py
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/test_pipes.py
@@ -232,6 +232,12 @@ class TestPipesWithVariousHandlers(TestUsingServer):
         resp = self.request("/document.txt", query="pipe=gzip")
         self.assertEqual(resp.getcode(), 200)
 
+    def test_sub_default_py(self):
+        route = ("GET", "/defaultsubpy", wptserve.handlers.python_script_handler)
+        self.server.router.register(*route)
+        resp = self.request("/defaultsubpy")
+        self.assertEqual(b"localhost", resp.read())
+
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/tests/wpt/tests/tools/wptserve/tests/functional/test_server.py b/tests/wpt/tests/tools/wptserve/tests/functional/test_server.py
index 939396ddee8..39ef5889bea 100644
--- a/tests/wpt/tests/tools/wptserve/tests/functional/test_server.py
+++ b/tests/wpt/tests/tools/wptserve/tests/functional/test_server.py
@@ -1,10 +1,15 @@
+import os
+import socket
+import ssl
 import unittest
-
-import pytest
 from urllib.error import HTTPError
 
+import pytest
+
+from localpaths import repo_root
+
 wptserve = pytest.importorskip("wptserve")
-from .base import TestUsingServer, TestUsingH2Server
+from .base import TestUsingH2Server, TestUsingServer, doc_root
 
 
 class TestFileHandler(TestUsingServer):
@@ -60,6 +65,65 @@ class TestRequestHandler(TestUsingServer):
         self.assertEqual(200, resp.getcode())
 
 
+class TestH1TLSHandshake(TestUsingServer):
+    def setUp(self):
+        self.server = wptserve.server.WebTestHttpd(
+            host="localhost",
+            port=0,
+            use_ssl=True,
+            key_file=os.path.join(repo_root, "tools", "certs", "web-platform.test.key"),
+            certificate=os.path.join(
+                repo_root, "tools", "certs", "web-platform.test.pem"
+            ),
+            doc_root=doc_root,
+        )
+        self.server.start()
+
+    def test_no_handshake(self):
+        context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+        context.load_verify_locations(
+            os.path.join(repo_root, "tools", "certs", "cacert.pem")
+        )
+
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s_no_handshake:
+            s_no_handshake.connect(("localhost", self.server.port))
+            # Note: this socket is left open, notably not sending the TLS handshake.
+
+            with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as sock:
+                sock.settimeout(10)
+                with context.wrap_socket(
+                    sock,
+                    do_handshake_on_connect=False,
+                    server_hostname="web-platform.test",
+                ) as ssock:
+                    ssock.connect(("localhost", self.server.port))
+                    ssock.do_handshake()
+                    # The pass condition here is essentially "don't raise TimeoutError".
+
+
+class TestH2TLSHandshake(TestUsingH2Server):
+    def test_no_handshake(self):
+        context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+        context.load_verify_locations(
+            os.path.join(repo_root, "tools", "certs", "cacert.pem")
+        )
+
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s_no_handshake:
+            s_no_handshake.connect(("localhost", self.server.port))
+            # Note: this socket is left open, notably not sending the TLS handshake.
+
+            with socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0) as sock:
+                sock.settimeout(10)
+                with context.wrap_socket(
+                    sock,
+                    do_handshake_on_connect=False,
+                    server_hostname="web-platform.test",
+                ) as ssock:
+                    ssock.connect(("localhost", self.server.port))
+                    ssock.do_handshake()
+                    # The pass condition here is essentially "don't raise TimeoutError".
+
+
 class TestH2Version(TestUsingH2Server):
     # The purpose of this test is to ensure that all TestUsingH2Server tests
     # actually end up using HTTP/2, in case there's any protocol negotiation.
diff --git a/tests/wpt/tests/tools/wptserve/wptserve/handlers.py b/tests/wpt/tests/tools/wptserve/wptserve/handlers.py
index 6d79230a324..62faf47d645 100644
--- a/tests/wpt/tests/tools/wptserve/wptserve/handlers.py
+++ b/tests/wpt/tests/tools/wptserve/wptserve/handlers.py
@@ -2,6 +2,7 @@
 
 import json
 import os
+import pathlib
 from collections import defaultdict
 
 from urllib.parse import quote, unquote, urljoin
@@ -289,6 +290,10 @@ class PythonScriptHandler:
         """
         This loads the requested python file as an environ variable.
 
+        If the requested file is a directory, this instead loads the first
+        lexicographically sorted file found in that directory that matches
+        "default*.py".
+
         Once the environ is loaded, the passed `func` is run with this loaded environ.
 
         :param request: The request object
@@ -298,6 +303,14 @@ class PythonScriptHandler:
         """
         path = filesystem_path(self.base_path, request, self.url_base)
 
+        # Find a default Python file if the specified path is a directory
+        if os.path.isdir(path):
+            default_py_files = sorted(list(filter(
+                pathlib.Path.is_file,
+                pathlib.Path(path).glob("default*.py"))))
+            if default_py_files:
+                path = str(default_py_files[0])
+
         try:
             environ = {"__file__": path}
             with open(path, 'rb') as f:
@@ -416,6 +429,9 @@ class AsIsHandler:
 
     def __call__(self, request, response):
         path = filesystem_path(self.base_path, request, self.url_base)
+        if os.path.isdir(path):
+            raise HTTPException(
+                500, "AsIsHandler cannot process directory, %s" % path)
 
         try:
             with open(path, 'rb') as f:
diff --git a/tests/wpt/tests/tools/wptserve/wptserve/server.py b/tests/wpt/tests/tools/wptserve/wptserve/server.py
index e1772d00b15..4167943ef83 100644
--- a/tests/wpt/tests/tools/wptserve/wptserve/server.py
+++ b/tests/wpt/tests/tools/wptserve/wptserve/server.py
@@ -214,14 +214,21 @@ class WebTestServer(http.server.ThreadingHTTPServer):
                 ssl_context.load_cert_chain(keyfile=self.key_file, certfile=self.certificate)
                 ssl_context.set_alpn_protocols(['h2'])
                 self.socket = ssl_context.wrap_socket(self.socket,
+                                                      do_handshake_on_connect=False,
                                                       server_side=True)
 
             else:
                 ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
                 ssl_context.load_cert_chain(keyfile=self.key_file, certfile=self.certificate)
                 self.socket = ssl_context.wrap_socket(self.socket,
+                                                      do_handshake_on_connect=False,
                                                       server_side=True)
 
+    def finish_request(self, request, client_address):
+        if isinstance(self.socket, ssl.SSLSocket):
+            request.do_handshake()
+        super().finish_request(request, client_address)
+
     def handle_error(self, request, client_address):
         error = sys.exc_info()[1]
 
@@ -229,7 +236,11 @@ class WebTestServer(http.server.ThreadingHTTPServer):
              isinstance(error.args, tuple) and
              error.args[0] in self.acceptable_errors) or
             (isinstance(error, IOError) and
-             error.errno in self.acceptable_errors)):
+             error.errno in self.acceptable_errors) or
+            # `SSLEOFError` may occur when a client (e.g., wptrunner's
+            # `TestEnvironment`) tests for connectivity but doesn't perform the
+            # handshake.
+            isinstance(error, ssl.SSLEOFError)):
             pass  # remote hang up before the result is sent
         else:
             msg = traceback.format_exc()
diff --git a/tests/wpt/tests/uievents/idlharness.window.js b/tests/wpt/tests/uievents/idlharness.window.js
index c3919e35583..ca8d23e4f6f 100644
--- a/tests/wpt/tests/uievents/idlharness.window.js
+++ b/tests/wpt/tests/uievents/idlharness.window.js
@@ -16,6 +16,7 @@ idl_test(
       CompositionEvent: ['new CompositionEvent("event")'],
       UIEvent: ['new UIEvent("event")'],
       InputEvent: ['new InputEvent("event")'],
+      TextEvent: ['(() => { const ev = document.createEvent("TextEvent"); ev.initTextEvent("event"); return ev; })()'],
     });
   }
 );
diff --git a/tests/wpt/tests/uievents/textInput/api.html b/tests/wpt/tests/uievents/textInput/api.html
new file mode 100644
index 00000000000..a88184e5001
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/api.html
@@ -0,0 +1,88 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: API</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<input class=test-el>
+<textarea class=test-el></textarea>
+<div contenteditable class=test-el></div>
+<script src="support/common.js"></script>
+<script>
+test(() => {
+  assert_throws_js(TypeError, () => {
+    new TextEvent('textInput');
+  });
+}, "No constructor");
+
+test(() => {
+  const e = document.createEvent('TextEvent');
+  assert_equals(Object.getPrototypeOf(e), window.TextEvent.prototype);
+  assert_equals(Object.getPrototypeOf(Object.getPrototypeOf(e)), window.UIEvent.prototype);
+  assert_equals(Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(e))), window.Event.prototype);
+}, "document.CreateEvent('TextEvent') prototype chain");
+
+test(() => {
+  const e = document.createEvent('TextEvent');
+  assert_throws_js(TypeError, () => { e.initTextEvent(); });
+}, "initTextEvent() no arguments");
+
+test(() => {
+  const e = document.createEvent('TextEvent');
+  e.initTextEvent('foo');
+  assert_equals(e.type, 'foo');
+  assert_equals(e.bubbles, false);
+  assert_equals(e.cancelable, false);
+  assert_equals(e.view, null);
+  assert_equals(e.data, 'undefined');
+}, "initTextEvent('foo')");
+
+test(() => {
+  const e = document.createEvent('TextEvent');
+  e.initTextEvent('foo', true, true, window, 'bar');
+  assert_equals(e.type, 'foo');
+  assert_equals(e.bubbles, true);
+  assert_equals(e.cancelable, true);
+  assert_equals(e.view, window);
+  assert_equals(e.data, 'bar');
+}, "initTextEvent('foo', true, true, window, 'bar')");
+
+test(() => {
+  const div = document.createElement('div');
+  let textinputCount = 0;
+  let textInputCount = 0;
+  div.addEventListener('textinput', e => {
+    assert_equals(e.type, 'textinput');
+    textinputCount++;
+  });
+  div.addEventListener('textInput', e => {
+    assert_equals(e.type, 'textInput');
+    textInputCount++;
+  });
+  const textinputEvent = document.createEvent('TextEvent');
+  textinputEvent.initTextEvent('textinput');
+  div.dispatchEvent(textinputEvent);
+
+  const textInputEvent = document.createEvent('TextEvent');
+  textInputEvent.initTextEvent('textInput');
+  div.dispatchEvent(textInputEvent);
+
+  assert_equals(textinputCount, 1);
+  assert_equals(textInputCount, 1);
+}, "case sensitivity: textInput vs textinput");
+
+const els = document.querySelectorAll('.test-el');
+for (const el of els) {
+  promise_test(t => {
+    return new Promise((resolve, reject) => {
+      el.addEventListener('textInput', reject);
+      el.addEventListener('input', t.step_func(e => {
+        const actualValue = 'value' in el ? el.value : el.textContent;
+        assert_equals(actualValue, 'a');
+        resolve();
+      }));
+      el.focus();
+      document.execCommand('insertText', false, 'a');
+    });
+  }, `execCommand('insertText', false, 'a'), ${elDesc(el)}` );
+}
+</script>
diff --git a/tests/wpt/tests/uievents/textInput/backspace.html b/tests/wpt/tests/uievents/textInput/backspace.html
new file mode 100644
index 00000000000..c9b2f8bee4e
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/backspace.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: backspace</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Press Backspace in each text field below.</p>
+<input class=test-el value=abc>
+<textarea class=test-el>abc</textarea>
+<div contenteditable=true class=test-el>abc</div>
+<script src="support/common.js"></script>
+<script src="support/no-textInput.sub.js?key=Backspace&selectionStart=2&selectionEnd=2&expectedValue=ac"></script>
diff --git a/tests/wpt/tests/uievents/textInput/basic.html b/tests/wpt/tests/uievents/textInput/basic.html
new file mode 100644
index 00000000000..6335167faa8
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/basic.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Type "a" into each text field below.</p>
+<input class=test-el>
+<textarea class=test-el></textarea>
+<div contenteditable=true class=test-el></div>
+<script src="support/common.js"></script>
+<script src="support/basic.sub.js?key=a&selectionStart=0&selectionEnd=0&expectedValue=a"></script>
diff --git a/tests/wpt/tests/uievents/textInput/delete-selection.html b/tests/wpt/tests/uievents/textInput/delete-selection.html
new file mode 100644
index 00000000000..f77e8c6e98a
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/delete-selection.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: delete selection</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Press Delete (Fn+Backspace for macOS) in each text field below.</p>
+<input class=test-el value=abc>
+<textarea class=test-el>abc</textarea>
+<div contenteditable=true class=test-el>abc</div>
+<script src="support/common.js"></script>
+<script src="support/no-textInput.sub.js?key=Delete&selectionStart=1&selectionEnd=2&expectedValue=ac"></script>
diff --git a/tests/wpt/tests/uievents/textInput/delete.html b/tests/wpt/tests/uievents/textInput/delete.html
new file mode 100644
index 00000000000..2d696fba71a
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/delete.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: delete</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Press Delete (Fn+Backspace for macOS) in each text field below.</p>
+<input class=test-el value=abc>
+<textarea class=test-el>abc</textarea>
+<div contenteditable=true class=test-el>abc</div>
+<script src="support/common.js"></script>
+<script src="support/no-textInput.sub.js?key=Delete&selectionStart=1&selectionEnd=1&expectedValue=ac"></script>
diff --git a/tests/wpt/tests/uievents/textInput/enter-input.html b/tests/wpt/tests/uievents/textInput/enter-input.html
new file mode 100644
index 00000000000..032503694dc
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/enter-input.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: Enter key for input element</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Press Enter in the text field below.</p>
+<input class=test-el>
+<script src="support/common.js"></script>
+<script src="support/no-textInput.sub.js?key=Enter&selectionStart=0&selectionEnd=0&expectedValue="></script>
diff --git a/tests/wpt/tests/uievents/textInput/enter-textarea-contenteditable.html b/tests/wpt/tests/uievents/textInput/enter-textarea-contenteditable.html
new file mode 100644
index 00000000000..60891df982e
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/enter-textarea-contenteditable.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: Enter key for textarea and contenteditable</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Press Enter in each text field below.</p>
+<textarea class=test-el></textarea>
+<div contenteditable=true class=test-el></div>
+<script src="support/common.js"></script>
+<script src="support/basic.sub.js?key=Enter&selectionStart=0&selectionEnd=0&expectedValue=\n"></script>
diff --git a/tests/wpt/tests/uievents/textInput/smiley-manual.html b/tests/wpt/tests/uievents/textInput/smiley-manual.html
new file mode 100644
index 00000000000..7781f6e1b06
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/smiley-manual.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>textInput: smiley (manual)</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+[contenteditable] { border: thin inset silver; }
+</style>
+<p>Type "🙂" into each text field below.</p>
+<input class=test-el>
+<textarea class=test-el></textarea>
+<div contenteditable=true class=test-el></div>
+<script>
+setup({ explicit_timeout: true });
+</script>
+<script src="support/common.js"></script>
+<script src="support/basic.sub.js?key=🙂&selectionStart=0&selectionEnd=0&expectedValue=🙂"></script>
diff --git a/tests/wpt/tests/uievents/textInput/support/basic.sub.js b/tests/wpt/tests/uievents/textInput/support/basic.sub.js
new file mode 100644
index 00000000000..55d2f0d1e64
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/support/basic.sub.js
@@ -0,0 +1,49 @@
+const els = document.querySelectorAll('.test-el');
+const key = "{{GET[key]}}";
+const keyRaw = keyMapping[key] || key;
+const expectedData = key === "Enter" ? "\n" : key;
+const selectionStart = {{GET[selectionStart]}};
+const selectionEnd = {{GET[selectionEnd]}};
+const expectedValue = "{{GET[expectedValue]}}";
+
+for (const el of els) {
+  promise_test(t => {
+    return new Promise((resolve, reject) => {
+      let beforeinputEvents = 0;
+      let textInputEvents = 0;
+      el.addEventListener('beforeinput', t.step_func(e => {
+        beforeinputEvents++;
+      }));
+      el.addEventListener('textInput', t.step_func(e => {
+        textInputEvents++;
+        assert_equals(beforeinputEvents, 1);
+        assert_equals(e.data, expectedData);
+        assert_true(e.bubbles);
+        assert_true(e.cancelable);
+        assert_equals(e.view, window);
+        assert_equals(e.detail, 0);
+        assert_true(e instanceof window.TextEvent);
+      }));
+      el.addEventListener('input', t.step_func(e => {
+        assert_equals(textInputEvents, 1);
+        if (expectedValue === "\n" && !(el instanceof HTMLInputElement) && !(el instanceof HTMLTextAreaElement)) {
+          // New paragraph in contenteditable during editing is weird.
+          // innerHTML is <div><br></div><div><br></div>
+          // ...but later changes to <br>
+          // So, check that there's at least one <br>.
+          assert_true(getValue(el).indexOf('<br>') > -1);
+        } else {
+          assert_equals(getValue(el), expectedValue);
+        }
+        resolve();
+      }));
+      el.onfocus = t.step_func(e => {
+        if (window.test_driver) {
+          test_driver.send_keys(el, keyRaw);
+        }
+      });
+      el.focus();
+      setSelection(el, selectionStart, selectionEnd);
+    });
+  }, `${document.title}, ${elDesc(el)}`);
+}
diff --git a/tests/wpt/tests/uievents/textInput/support/common.js b/tests/wpt/tests/uievents/textInput/support/common.js
new file mode 100644
index 00000000000..25c39da3e2b
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/support/common.js
@@ -0,0 +1,38 @@
+function elDesc(el) {
+  let rv = `<${el.localName}`;
+  if (el.hasAttribute('contenteditable')) {
+    rv += ` contenteditable="${el.getAttribute('contenteditable')}"`;
+  }
+  if (el.hasAttribute('type')) {
+    rv += ` type="${el.getAttribute('type')}"`;
+  }
+  rv += `>`;
+  return rv;
+}
+
+function setSelection(el, selectionStart, selectionEnd) {
+  if (el instanceof HTMLInputElement || el instanceof HTMLTextAreaElement) {
+    el.selectionStart = selectionStart;
+    el.selectionEnd = selectionEnd;
+  } else {
+    const s = getSelection();
+    s.removeAllRanges();
+    const r = new Range();
+    r.setStart(el.firstChild || el, selectionStart);
+    r.setEnd(el.firstChild || el, selectionEnd);
+    s.addRange(r);
+  }
+}
+
+function getValue(el) {
+  if (el instanceof HTMLInputElement || el instanceof HTMLTextAreaElement) {
+    return el.value;
+  }
+  return el.innerHTML;
+}
+
+const keyMapping = {
+  "Enter": "\uE006",
+  "Backspace": "\uE003",
+  "Delete": "\uE017",
+};
diff --git a/tests/wpt/tests/uievents/textInput/support/no-textInput.sub.js b/tests/wpt/tests/uievents/textInput/support/no-textInput.sub.js
new file mode 100644
index 00000000000..332cbf08f2b
--- /dev/null
+++ b/tests/wpt/tests/uievents/textInput/support/no-textInput.sub.js
@@ -0,0 +1,29 @@
+const els = document.querySelectorAll('.test-el');
+const key = "{{GET[key]}}";
+const keyRaw = keyMapping[key] || key;
+const expectedData = key === "Enter" ? "\n" : key;
+const selectionStart = {{GET[selectionStart]}};
+const selectionEnd = {{GET[selectionEnd]}};
+const expectedValue = "{{GET[expectedValue]}}";
+
+for (const el of els) {
+  promise_test(t => {
+    return new Promise((resolve, reject) => {
+      el.addEventListener('textInput', reject);
+      el.addEventListener('keyup', t.step_func(e => {
+        if (e.key !== key) {
+          return;
+        }
+        assert_equals(getValue(el), expectedValue);
+        resolve();
+      }));
+      el.onfocus = t.step_func(e => {
+        if (window.test_driver) {
+          test_driver.send_keys(el, keyRaw);
+        }
+      });
+      el.focus();
+      setSelection(el, selectionStart, selectionEnd);
+    });
+  }, `${document.title}, ${elDesc(el)}`);
+}
diff --git a/tests/wpt/tests/wai-aria/role/contextual-roles.html b/tests/wpt/tests/wai-aria/role/contextual-roles.html
index 90b1842f089..ff5c073e954 100644
--- a/tests/wpt/tests/wai-aria/role/contextual-roles.html
+++ b/tests/wpt/tests/wai-aria/role/contextual-roles.html
@@ -76,7 +76,6 @@
     see: https://w3c.github.io/html-aam/#el-footer-ancestorbody -->
     <main>
         <footer data-testname="footer element scoped to main element is generic" class="ex-generic">x</footer>
-        <div role="contentinfo" data-testname="contentinfo region scoped to main element is generic" class="ex-generic">x</div>
     </main>
 
     <footer data-testname="footer scoped to body element is contentinfo" data-expectedrole="contentinfo" class="ex">x</footer>
diff --git a/tests/wpt/tests/webdriver/tests/bidi/input/set_files/__init__.py b/tests/wpt/tests/webdriver/tests/bidi/input/set_files/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/wpt/tests/webdriver/tests/bidi/input/set_files/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/input/set_files/invalid.py
new file mode 100644
index 00000000000..f0efeaa69c5
--- /dev/null
+++ b/tests/wpt/tests/webdriver/tests/bidi/input/set_files/invalid.py
@@ -0,0 +1,154 @@
+import pytest
+
+from webdriver.bidi.error import (
+    InvalidArgumentException,
+    NoSuchElementException,
+    NoSuchFrameException,
+    UnableToSetFileInputException,
+)
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("value", [None, True, 42, {}, []])
+async def test_params_context_invalid_type(
+    bidi_session, load_static_test_page, get_element, value
+):
+    await load_static_test_page(page="files.html")
+    element = await get_element("#input")
+    with pytest.raises(InvalidArgumentException):
+        await bidi_session.input.set_files(
+            context=value,
+            element=element,
+            files=[],
+        )
+
+
+async def test_params_context_invalid_value(
+    bidi_session, load_static_test_page, get_element
+):
+    await load_static_test_page(page="files.html")
+    element = await get_element("#input")
+    with pytest.raises(NoSuchFrameException):
+        await bidi_session.input.set_files(
+            context="foo",
+            element=element,
+            files=[],
+        )
+
+
+@pytest.mark.parametrize("value", [None, True, 42, []])
+async def test_params_element_invalid_type(bidi_session, top_context, value):
+    with pytest.raises(InvalidArgumentException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element=value,
+            files=[],
+        )
+
+
+@pytest.mark.parametrize("value", [None, True, 42, {}])
+async def test_params_files_invalid_type(
+    top_context, bidi_session, load_static_test_page, get_element, value
+):
+    await load_static_test_page(page="files.html")
+    element = await get_element("#input")
+    with pytest.raises(InvalidArgumentException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element=element,
+            files=value,
+        )
+
+
+@pytest.mark.parametrize(
+    "files",
+    [
+        ["path/to/noop.txt"],
+        [],
+    ],
+)
+async def test_params_element_invalid_value(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    files,
+):
+    await load_static_test_page(page="files.html")
+
+    with pytest.raises(NoSuchElementException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element={"sharedId": "invalid"},
+            files=files,
+        )
+
+
+@pytest.mark.parametrize(
+    "files",
+    [
+        ["path/to/noop.txt"],
+        [],
+    ],
+)
+async def test_params_element_disabled(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+    files,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input-disabled")
+
+    with pytest.raises(UnableToSetFileInputException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element=element,
+            files=files,
+        )
+
+
+@pytest.mark.parametrize(
+    "files",
+    [
+        ["path/to/noop.txt"],
+        [],
+    ],
+)
+async def test_params_element_non_file_input(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+    files,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#text-input")
+
+    with pytest.raises(UnableToSetFileInputException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element=element,
+            files=files,
+        )
+
+
+async def test_params_element_not_multiple(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    with pytest.raises(UnableToSetFileInputException):
+        await bidi_session.input.set_files(
+            context=top_context["context"],
+            element=element,
+            files=["path/to/noop.txt", "path/to/noop-2.txt"],
+        )
diff --git a/tests/wpt/tests/webdriver/tests/bidi/input/set_files/set_files.py b/tests/wpt/tests/webdriver/tests/bidi/input/set_files/set_files.py
new file mode 100644
index 00000000000..642bd3e5423
--- /dev/null
+++ b/tests/wpt/tests/webdriver/tests/bidi/input/set_files/set_files.py
@@ -0,0 +1,241 @@
+import pytest
+
+from .. import get_events
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_set_files(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt"],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "change",
+        },
+    ]
+
+
+async def test_set_files_empty(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=[],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [],
+            "type": "cancel",
+        },
+    ]
+
+
+async def test_set_files_multiple(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input-multiple")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt", "path/to/noop-2.txt"],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [
+                "noop.txt",
+                "noop-2.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop.txt",
+                "noop-2.txt",
+            ],
+            "type": "change",
+        },
+    ]
+
+
+async def test_set_files_something_then_empty(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt"],
+    )
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=[],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "change",
+        },
+        {
+            "files": [],
+            "type": "input",
+        },
+        {
+            "files": [],
+            "type": "change",
+        },
+    ]
+
+
+async def test_set_files_twice(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt"],
+    )
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop-2.txt"],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "change",
+        },
+        {
+            "files": [
+                "noop-2.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop-2.txt",
+            ],
+            "type": "change",
+        },
+    ]
+
+
+async def test_set_files_twice_same(
+    bidi_session,
+    top_context,
+    load_static_test_page,
+    get_element,
+):
+    await load_static_test_page(page="files.html")
+
+    element = await get_element("#input")
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt"],
+    )
+
+    await bidi_session.input.set_files(
+        context=top_context["context"],
+        element=element,
+        files=["path/to/noop.txt"],
+    )
+
+    events = await get_events(bidi_session, top_context["context"])
+    assert events == [
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "input",
+        },
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "change",
+        },
+        {
+            "files": [
+                "noop.txt",
+            ],
+            "type": "cancel",
+        },
+    ]
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/add_intercept/url_patterns.py b/tests/wpt/tests/webdriver/tests/bidi/network/add_intercept/url_patterns.py
index 517a94ffc4b..cee5f5d8225 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/network/add_intercept/url_patterns.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/add_intercept/url_patterns.py
@@ -59,7 +59,7 @@ def substitute_host(server_config):
 async def test_pattern_patterns_matching(
     wait_for_event,
     subscribe_events,
-    top_context,
+    new_tab,
     add_intercept,
     fetch,
     substitute_host,
@@ -67,7 +67,7 @@ async def test_pattern_patterns_matching(
     patterns,
     url_template,
 ):
-    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[top_context["context"]])
+    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[new_tab["context"]])
 
     for pattern in patterns:
         for key in pattern:
@@ -78,7 +78,7 @@ async def test_pattern_patterns_matching(
     intercept = await add_intercept(phases=["beforeRequestSent"], url_patterns=patterns)
 
     on_network_event = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
-    asyncio.ensure_future(fetch(substitute_host(url_template)))
+    asyncio.ensure_future(fetch(substitute_host(url_template), context=new_tab))
     event = await wait_for_future_safe(on_network_event)
 
     assert_before_request_sent_event(event, is_blocked=True, intercepts=[intercept])
@@ -106,7 +106,7 @@ async def test_pattern_patterns_matching(
 async def test_pattern_patterns_not_matching(
     wait_for_event,
     subscribe_events,
-    top_context,
+    new_tab,
     add_intercept,
     fetch,
     substitute_host,
@@ -114,7 +114,7 @@ async def test_pattern_patterns_not_matching(
     pattern,
     url_template,
 ):
-    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[top_context["context"]])
+    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[new_tab["context"]])
 
     for key in pattern:
         pattern[key] = substitute_host(pattern[key])
@@ -124,7 +124,7 @@ async def test_pattern_patterns_not_matching(
     await add_intercept(phases=["beforeRequestSent"], url_patterns=[pattern])
 
     on_network_event = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
-    asyncio.ensure_future(fetch(substitute_host(url_template)))
+    asyncio.ensure_future(fetch(substitute_host(url_template), context=new_tab))
     event = await wait_for_future_safe(on_network_event)
 
     assert_before_request_sent_event(event, is_blocked=False)
@@ -156,7 +156,7 @@ async def test_pattern_patterns_not_matching(
 async def test_string_patterns_matching(
     wait_for_event,
     subscribe_events,
-    top_context,
+    new_tab,
     add_intercept,
     fetch,
     substitute_host,
@@ -164,7 +164,7 @@ async def test_string_patterns_matching(
     pattern,
     url_template,
 ):
-    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[top_context["context"]])
+    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[new_tab["context"]])
 
     intercept = await add_intercept(
         phases=["beforeRequestSent"],
@@ -172,7 +172,7 @@ async def test_string_patterns_matching(
     )
 
     on_network_event = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
-    asyncio.ensure_future(fetch(substitute_host(url_template)))
+    asyncio.ensure_future(fetch(substitute_host(url_template), context=new_tab))
     event = await wait_for_future_safe(on_network_event)
 
     assert_before_request_sent_event(event, is_blocked=True, intercepts=[intercept])
@@ -198,7 +198,7 @@ async def test_string_patterns_matching(
 async def test_string_patterns_not_matching(
     wait_for_event,
     subscribe_events,
-    top_context,
+    new_tab,
     add_intercept,
     fetch,
     substitute_host,
@@ -206,7 +206,7 @@ async def test_string_patterns_not_matching(
     pattern,
     url_template,
 ):
-    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[top_context["context"]])
+    await subscribe_events(events=[BEFORE_REQUEST_SENT_EVENT], contexts=[new_tab["context"]])
 
     await add_intercept(
         phases=["beforeRequestSent"],
@@ -214,7 +214,7 @@ async def test_string_patterns_not_matching(
     )
 
     on_network_event = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
-    asyncio.ensure_future(fetch(substitute_host(url_template)))
+    asyncio.ensure_future(fetch(substitute_host(url_template), context=new_tab))
     event = await wait_for_future_safe(on_network_event)
 
     assert_before_request_sent_event(event, is_blocked=False)
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/before_request_sent/before_request_sent_cached.py b/tests/wpt/tests/webdriver/tests/bidi/network/before_request_sent/before_request_sent_cached.py
new file mode 100644
index 00000000000..2de71362ae5
--- /dev/null
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/before_request_sent/before_request_sent_cached.py
@@ -0,0 +1,123 @@
+import pytest
+import random
+
+from tests.support.sync import AsyncPoll
+
+from .. import (
+    assert_before_request_sent_event,
+    PAGE_EMPTY_TEXT,
+    BEFORE_REQUEST_SENT_EVENT,
+)
+
+# Note: The cached status cannot be checked in the beforeRequestSent event, but
+# the goal is to verify that the events are still emitted for cached requests.
+
+
+@pytest.mark.asyncio
+async def test_cached_document(
+    wait_for_event,
+    wait_for_future_safe,
+    url,
+    fetch,
+    setup_network_test,
+):
+    network_events = await setup_network_test(
+        events=[
+            BEFORE_REQUEST_SENT_EVENT,
+        ]
+    )
+    events = network_events[BEFORE_REQUEST_SENT_EVENT]
+
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
+    cached_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=200&nocache={random.random()}"
+    )
+    on_before_request_sent = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
+    await fetch(cached_url)
+    await wait_for_future_safe(on_before_request_sent)
+
+    assert len(events) == 1
+    expected_request = {"method": "GET", "url": cached_url}
+
+    assert_before_request_sent_event(
+        events[0],
+        expected_request=expected_request,
+    )
+
+    on_before_request_sent = wait_for_event(BEFORE_REQUEST_SENT_EVENT)
+    await fetch(cached_url)
+    await wait_for_future_safe(on_before_request_sent)
+
+    assert len(events) == 2
+
+    assert_before_request_sent_event(
+        events[1],
+        expected_request=expected_request,
+    )
+
+
+@pytest.mark.asyncio
+async def test_page_with_cached_resource(
+    bidi_session,
+    url,
+    inline,
+    setup_network_test,
+    top_context,
+):
+    network_events = await setup_network_test(
+        events=[
+            BEFORE_REQUEST_SENT_EVENT,
+        ]
+    )
+    events = network_events[BEFORE_REQUEST_SENT_EVENT]
+
+    # Build a page with a stylesheet resource which will be read from http cache
+    # on the next reload.
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
+    cached_css_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=200&contenttype=text/css&nocache={random.random()}"
+    )
+    page_with_cached_css = inline(
+        f"""
+        <head><link rel="stylesheet" type="text/css" href="{cached_css_url}"></head>
+        <body>test page with cached stylesheet</body>
+        """,
+    )
+
+    await bidi_session.browsing_context.navigate(
+        context=top_context["context"],
+        url=page_with_cached_css,
+        wait="complete",
+    )
+
+    # Expect two events, one for the document, one for the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 2)
+    assert len(events) == 2
+
+    assert_before_request_sent_event(
+        events[0],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+    )
+    assert_before_request_sent_event(
+        events[1],
+        expected_request={"method": "GET", "url": cached_css_url},
+    )
+
+    # Reload the page.
+    await bidi_session.browsing_context.reload(context=top_context["context"])
+
+    # Expect two events after reload, for the document and the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 4)
+    assert len(events) == 4
+
+    assert_before_request_sent_event(
+        events[2],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+    )
+
+    assert_before_request_sent_event(
+        events[3],
+        expected_request={"method": "GET", "url": cached_css_url},
+    )
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/continue_response/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/network/continue_response/invalid.py
index 2b59b3acc63..41f786ef6d7 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/network/continue_response/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/continue_response/invalid.py
@@ -184,7 +184,7 @@ async def test_params_cookies_cookie_value_max_age_invalid_value(
         )
 
 
-@pytest.mark.parametrize("value", [None, None, False, 42, {}, []])
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
 async def test_params_cookies_cookie_value_value_invalid_type(
     setup_blocked_request, bidi_session, value
 ):
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/invalid.py
index eec118a692d..49177bcb4a0 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/invalid.py
@@ -1,11 +1,350 @@
+# META: timeout=long
+
 import pytest
 import webdriver.bidi.error as error
 
-from .. import PAGE_EMPTY_TEXT, RESPONSE_COMPLETED_EVENT
+from .. import (
+    create_cookie_header,
+    create_header,
+    PAGE_EMPTY_TEXT,
+    RESPONSE_COMPLETED_EVENT,
+)
 
 pytestmark = pytest.mark.asyncio
 
 
+@pytest.mark.parametrize("value", [False, 42, "foo", []])
+async def test_params_body_invalid_type(setup_blocked_request, bidi_session, value):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, body=value)
+
+
+@pytest.mark.parametrize("value", [{}, {"type": "string"}, {"value": "foo"}])
+async def test_params_body_invalid_value(setup_blocked_request, bidi_session, value):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, body=value)
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_body_type_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request, body={"type": value, "value": "foo"}
+        )
+
+
+@pytest.mark.parametrize("value", ["", "foo"])
+async def test_params_body_type_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request, body={"type": value, "value": "foo"}
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_body_value_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request, body={"type": "string", "value": value}
+        )
+
+
+@pytest.mark.parametrize("value", [False, 42, "foo", {}])
+async def test_params_cookies_invalid_type(setup_blocked_request, bidi_session, value):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, cookies=value)
+
+
+@pytest.mark.parametrize("value", [None, False, 42, "foo", []])
+async def test_params_cookies_cookie_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, cookies=[value])
+
+
+@pytest.mark.parametrize(
+    "value",
+    [{}, {"name": "name"}, {"value": {"type": "string", "value": "foo"}}],
+    ids=[
+        "empty object",
+        "missing value",
+        "missing name",
+    ],
+)
+async def test_params_cookies_cookie_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[value],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_cookies_cookie_name_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"name": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, "foo", []])
+async def test_params_cookies_cookie_value_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"value": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [{}, {"type": "string"}, {"value": "foo"}])
+async def test_params_cookies_cookie_value_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"value": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_cookies_cookie_value_type_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(value_overrides={"type": value})],
+        )
+
+
+@pytest.mark.parametrize("value", ["", "foo"])
+async def test_params_cookies_cookie_value_type_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(value_overrides={"type": value})],
+        )
+
+
+@pytest.mark.parametrize("property", ["domain", "expiry", "path", "sameSite"])
+@pytest.mark.parametrize("value", [False, 42, {}, []])
+async def test_params_cookies_cookie_value_string_properties_invalid_type(
+    setup_blocked_request, bidi_session, property, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={property: value})],
+        )
+
+
+@pytest.mark.parametrize("value", ["", "foo"])
+async def test_params_cookies_cookie_value_same_site_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"sameSite": value})],
+        )
+
+
+@pytest.mark.parametrize("property", ["httpOnly", "secure"])
+@pytest.mark.parametrize("value", [42, "foo", {}, []])
+async def test_params_cookies_cookie_value_bool_properties_invalid_type(
+    setup_blocked_request, bidi_session, property, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={property: value})],
+        )
+
+
+@pytest.mark.parametrize("value", [False, "foo", {}, []])
+async def test_params_cookies_cookie_value_max_age_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"maxAge": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [4.3])
+async def test_params_cookies_cookie_value_max_age_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(overrides={"maxAge": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_cookies_cookie_value_value_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            cookies=[create_cookie_header(value_overrides={"value": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [False, 42, "foo", {}])
+async def test_params_headers_invalid_type(setup_blocked_request, bidi_session, value):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, headers=value)
+
+
+@pytest.mark.parametrize("value", [None, False, 42, "foo", []])
+async def test_params_headers_header_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(request=request, headers=[value])
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_headers_header_name_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(overrides={"name": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, "foo", []])
+async def test_params_headers_header_value_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(overrides={"value": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [{}, {"type": "string"}, {"value": "foo"}])
+async def test_params_headers_header_value_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(overrides={"value": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_headers_header_value_type_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(value_overrides={"type": value})],
+        )
+
+
+@pytest.mark.parametrize("value", ["", "foo"])
+async def test_params_headers_header_value_type_invalid_value(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(value_overrides={"type": value})],
+        )
+
+
+@pytest.mark.parametrize("value", [None, False, 42, {}, []])
+async def test_params_headers_header_value_value_invalid_type(
+    setup_blocked_request, bidi_session, value
+):
+    request = await setup_blocked_request("beforeRequestSent")
+
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.network.provide_response(
+            request=request,
+            headers=[create_header(value_overrides={"value": value})],
+        )
+
+
 @pytest.mark.parametrize("value", [None, False, 42, {}, []])
 async def test_params_request_invalid_type(bidi_session, value):
     with pytest.raises(error.InvalidArgumentException):
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/request.py b/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/request.py
new file mode 100644
index 00000000000..de9492f0a52
--- /dev/null
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/provide_response/request.py
@@ -0,0 +1,67 @@
+import pytest
+
+from webdriver.bidi.modules.network import AuthCredentials
+
+from tests.support.sync import AsyncPoll
+
+from .. import AUTH_REQUIRED_EVENT, RESPONSE_COMPLETED_EVENT, RESPONSE_STARTED_EVENT
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("navigate", [False, True], ids=["fetch", "navigate"])
+async def test_provide_response_auth_required(
+    setup_blocked_request, subscribe_events, wait_for_event, bidi_session, navigate
+):
+    request = await setup_blocked_request("authRequired", navigate=navigate)
+
+    await subscribe_events(
+        events=[
+            AUTH_REQUIRED_EVENT,
+            "browsingContext.load",
+        ]
+    )
+
+    # For requests blocked on authRequired, providing a response with no
+    # additional argument should just lead to another authRequired event.
+    on_auth_required = wait_for_event(AUTH_REQUIRED_EVENT)
+
+    await bidi_session.network.provide_response(request=request)
+
+    await on_auth_required
+
+
+@pytest.mark.parametrize("phase", ["beforeRequestSent", "responseStarted"])
+@pytest.mark.parametrize("navigate", [False, True], ids=["fetch", "navigate"])
+async def test_provide_response_phase(
+    setup_blocked_request, subscribe_events, wait_for_event, bidi_session, phase, navigate
+):
+    request = await setup_blocked_request(phase, navigate=navigate)
+
+    await subscribe_events(
+        events=[
+            RESPONSE_STARTED_EVENT,
+            RESPONSE_COMPLETED_EVENT,
+            "browsingContext.load",
+        ]
+    )
+
+    on_response_completed = wait_for_event(RESPONSE_COMPLETED_EVENT)
+
+    if phase == "beforeRequestSent":
+        # For a request blocked on beforeRequestSent, a responseStarted event is
+        # also expected.
+        on_response_started = wait_for_event(RESPONSE_STARTED_EVENT)
+
+    if navigate:
+        on_load = wait_for_event("browsingContext.load")
+
+    await bidi_session.network.provide_response(request=request)
+
+    await on_response_completed
+
+    if phase == "beforeRequestSent":
+        await on_response_started
+
+    if navigate:
+        await on_load
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/response_completed/response_completed_cached.py b/tests/wpt/tests/webdriver/tests/bidi/network/response_completed/response_completed_cached.py
index 6457e7d412b..25503c971db 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/network/response_completed/response_completed_cached.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/response_completed/response_completed_cached.py
@@ -148,6 +148,7 @@ async def test_cached_revalidate(
     )
     events = network_events[RESPONSE_COMPLETED_EVENT]
 
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
     revalidate_url = url(
         f"/webdriver/tests/support/http_handlers/must-revalidate.py?nocache={random.random()}"
     )
@@ -189,3 +190,74 @@ async def test_cached_revalidate(
         expected_request=expected_request,
         expected_response=expected_response,
     )
+
+
+@pytest.mark.asyncio
+async def test_page_with_cached_resource(
+    bidi_session,
+    url,
+    inline,
+    setup_network_test,
+    top_context,
+):
+    network_events = await setup_network_test(
+        events=[
+            RESPONSE_COMPLETED_EVENT,
+        ]
+    )
+    events = network_events[RESPONSE_COMPLETED_EVENT]
+
+    # Build a page with a stylesheet resource which will be read from http cache
+    # on the next reload.
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
+    cached_css_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=200&contenttype=text/css&nocache={random.random()}"
+    )
+    page_with_cached_css = inline(
+        f"""
+        <head><link rel="stylesheet" type="text/css" href="{cached_css_url}"></head>
+        <body>test page with cached stylesheet</body>
+        """,
+    )
+
+    await bidi_session.browsing_context.navigate(
+        context=top_context["context"],
+        url=page_with_cached_css,
+        wait="complete",
+    )
+
+    # Expect two events, one for the page, one for the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 2)
+    assert len(events) == 2
+
+    assert_response_event(
+        events[0],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+        expected_response={"url": page_with_cached_css, "fromCache": False},
+    )
+    assert_response_event(
+        events[1],
+        expected_request={"method": "GET", "url": cached_css_url},
+        expected_response={"url": cached_css_url, "fromCache": False},
+    )
+
+    # Reload the page.
+    await bidi_session.browsing_context.reload(context=top_context["context"])
+
+    # Expect two additional events after reload, for the page and the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 4)
+    assert len(events) == 4
+
+    assert_response_event(
+        events[2],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+        expected_response={"url": page_with_cached_css, "fromCache": False},
+    )
+
+    assert_response_event(
+        events[3],
+        expected_request={"method": "GET", "url": cached_css_url},
+        expected_response={"url": cached_css_url, "fromCache": True},
+    )
diff --git a/tests/wpt/tests/webdriver/tests/bidi/network/response_started/response_started_cached.py b/tests/wpt/tests/webdriver/tests/bidi/network/response_started/response_started_cached.py
index 2776950b0ec..2c747f135a1 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/network/response_started/response_started_cached.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/network/response_started/response_started_cached.py
@@ -21,6 +21,7 @@ async def test_cached(
     )
     events = network_events[RESPONSE_STARTED_EVENT]
 
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
     cached_url = url(
         f"/webdriver/tests/support/http_handlers/cached.py?status=200&nocache={random.random()}"
     )
@@ -78,6 +79,7 @@ async def test_cached_redirect(
     events = network_events[RESPONSE_STARTED_EVENT]
 
     text_url = url(PAGE_EMPTY_TEXT)
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
     cached_url = url(
         f"/webdriver/tests/support/http_handlers/cached.py?status=301&location={text_url}&nocache={random.random()}"
     )
@@ -156,6 +158,7 @@ async def test_cached_revalidate(
     )
     events = network_events[RESPONSE_STARTED_EVENT]
 
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
     revalidate_url = url(
         f"/webdriver/tests/support/http_handlers/must-revalidate.py?nocache={random.random()}"
     )
@@ -197,3 +200,74 @@ async def test_cached_revalidate(
         expected_request=expected_request,
         expected_response=expected_response,
     )
+
+
+@pytest.mark.asyncio
+async def test_page_with_cached_resource(
+    bidi_session,
+    url,
+    inline,
+    setup_network_test,
+    top_context,
+):
+    network_events = await setup_network_test(
+        events=[
+            RESPONSE_STARTED_EVENT,
+        ]
+    )
+    events = network_events[RESPONSE_STARTED_EVENT]
+
+    # Build a page with a stylesheet resource which will be read from http cache
+    # on the next reload.
+    # `nocache` is not used in cached.py, it is here to avoid the browser cache.
+    cached_css_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=200&contenttype=text/css&nocache={random.random()}"
+    )
+    page_with_cached_css = inline(
+        f"""
+        <head><link rel="stylesheet" type="text/css" href="{cached_css_url}"></head>
+        <body>test page with cached stylesheet</body>
+        """,
+    )
+
+    await bidi_session.browsing_context.navigate(
+        context=top_context["context"],
+        url=page_with_cached_css,
+        wait="complete",
+    )
+
+    # Expect two events, one for the page, one for the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 2)
+    assert len(events) == 2
+
+    assert_response_event(
+        events[0],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+        expected_response={"url": page_with_cached_css, "fromCache": False},
+    )
+    assert_response_event(
+        events[1],
+        expected_request={"method": "GET", "url": cached_css_url},
+        expected_response={"url": cached_css_url, "fromCache": False},
+    )
+
+    # Reload the page.
+    await bidi_session.browsing_context.reload(context=top_context["context"])
+
+    # Expect two additional events after reload, for the page and the stylesheet.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 4)
+    assert len(events) == 4
+
+    assert_response_event(
+        events[2],
+        expected_request={"method": "GET", "url": page_with_cached_css},
+        expected_response={"url": page_with_cached_css, "fromCache": False},
+    )
+
+    assert_response_event(
+        events[3],
+        expected_request={"method": "GET", "url": cached_css_url},
+        expected_response={"url": cached_css_url, "fromCache": True},
+    )
diff --git a/tests/wpt/tests/webdriver/tests/support/html/files.html b/tests/wpt/tests/webdriver/tests/support/html/files.html
new file mode 100644
index 00000000000..3a710f0989e
--- /dev/null
+++ b/tests/wpt/tests/webdriver/tests/support/html/files.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<html>
+  <body>
+    <input id="input" type="file" />
+    <input id="input-multiple" multiple type="file" />
+    <input id="input-disabled" disabled type="file" />
+    <input id="text-input" type="text" />
+    <script>
+      var allEvents = {events: []};
+      const input = document.getElementById('input');
+      input.addEventListener('input', (event) => {
+        allEvents.events.push({
+          type: event.type,
+          files: [...event.target.files].map((file) => file.name),
+        });
+      });
+      input.addEventListener('change', (event) => {
+        allEvents.events.push({
+          type: event.type,
+          files: [...event.target.files].map((file) => file.name),
+        });
+      });
+      input.addEventListener('cancel', (event) => {
+        allEvents.events.push({
+          type: event.type,
+          files: [...event.target.files].map((file) => file.name),
+        });
+      });
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/tests/webdriver/tests/support/http_handlers/cached.py b/tests/wpt/tests/webdriver/tests/support/http_handlers/cached.py
index a43410f8856..ce1dadefa14 100644
--- a/tests/wpt/tests/webdriver/tests/support/http_handlers/cached.py
+++ b/tests/wpt/tests/webdriver/tests/support/http_handlers/cached.py
@@ -8,7 +8,14 @@ def main(request, response):
         response.headers.set(b"Location", request.GET.first(b"location"))
 
     response.status = status
-    response.headers.set(b"Content-Type", "text/plain")
+
+
+    if b"contenttype" in request.GET:
+        content_type = request.GET.first(b"contenttype")
+        response.headers.set(b"Content-Type", content_type)
+    else:
+        response.headers.set(b"Content-Type", "text/plain")
+
     response.headers.set(b"Expires", "Thu, 01 Dec 2100 20:00:00 GMT")
     response.headers.set(b"Cache-Control", "max-age=3600")
     return "Cached HTTP Response"
diff --git a/tests/wpt/tests/webnn/constant.https.any.js b/tests/wpt/tests/webnn/constant.https.any.js
new file mode 100644
index 00000000000..afb020d275c
--- /dev/null
+++ b/tests/wpt/tests/webnn/constant.https.any.js
@@ -0,0 +1,10 @@
+// META: title=test WebNN API constant
+// META: global=window,dedicatedworker
+// META: script=./resources/utils.js
+// META: timeout=long
+
+'use strict';
+
+// https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-constant-range
+
+testWebNNOperation('constant', buildConstantRange);
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/gpu/constant.https.any.js b/tests/wpt/tests/webnn/gpu/constant.https.any.js
new file mode 100644
index 00000000000..7e0933f2f1b
--- /dev/null
+++ b/tests/wpt/tests/webnn/gpu/constant.https.any.js
@@ -0,0 +1,10 @@
+// META: title=test WebNN API constant
+// META: global=window,dedicatedworker
+// META: script=../resources/utils.js
+// META: timeout=long
+
+'use strict';
+
+// https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-constant-range
+
+testWebNNOperation('constant', buildConstantRange, 'gpu');
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/gpu/pooling.https.any.js b/tests/wpt/tests/webnn/gpu/pooling.https.any.js
index ab128818812..e174bb5186a 100644
--- a/tests/wpt/tests/webnn/gpu/pooling.https.any.js
+++ b/tests/wpt/tests/webnn/gpu/pooling.https.any.js
@@ -7,4 +7,4 @@
 
 // https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-pool2d
 
-testWebNNOperation(['averagePool2d', 'maxPool2d'], buildOperationWithSingleInput, 'gpu');
\ No newline at end of file
+testWebNNOperation(['averagePool2d', 'l2Pool2d', 'maxPool2d'], buildOperationWithSingleInput, 'gpu');
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/gpu/triangular.https.any.js b/tests/wpt/tests/webnn/gpu/triangular.https.any.js
new file mode 100644
index 00000000000..3b779fabd31
--- /dev/null
+++ b/tests/wpt/tests/webnn/gpu/triangular.https.any.js
@@ -0,0 +1,10 @@
+// META: title=test WebNN API triangular operation
+// META: global=window,dedicatedworker
+// META: script=../resources/utils.js
+// META: timeout=long
+
+'use strict';
+
+// https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-triangular
+
+testWebNNOperation('triangular', buildOperationWithSingleInput, 'gpu');
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/idlharness.https.any.js b/tests/wpt/tests/webnn/idlharness.https.any.js
index 65e21d5a1dc..93e88294ef1 100644
--- a/tests/wpt/tests/webnn/idlharness.https.any.js
+++ b/tests/wpt/tests/webnn/idlharness.https.any.js
@@ -28,29 +28,18 @@ idl_test(
       MLGraph: ['graph']
     });
 
-    for (const executionType of ExecutionArray) {
-      const isSync = executionType === 'sync';
-      if (self.GLOBAL.isWindow() && isSync) {
-        continue;
-      }
+    self.context = await navigator.ml.createContext();
 
-      if (isSync) {
-        self.context = navigator.ml.createContextSync();
-      } else {
-        self.context = await navigator.ml.createContext();
-      }
+    self.builder = new MLGraphBuilder(self.context);
+    self.input =
+        builder.input('input', {dataType: 'float32', dimensions: [1, 1, 5, 5]});
+    self.filter = builder.constant(
+        {dataType: 'float32', dimensions: [1, 1, 3, 3]},
+        new Float32Array(9).fill(1));
+    self.relu = builder.relu();
+    self.output =
+        builder.conv2d(input, filter, {activation: relu, inputLayout: "nchw"});
 
-      self.builder = new MLGraphBuilder(self.context);
-      self.input = builder.input('input', {dataType: 'float32', dimensions: [1, 1, 5, 5]});
-      self.filter = builder.constant({dataType: 'float32', dimensions: [1, 1, 3, 3]}, new Float32Array(9).fill(1));
-      self.relu = builder.relu();
-      self.output = builder.conv2d(input, filter, {activation: relu, inputLayout: "nchw"});
-
-      if (isSync) {
-        self.graph = builder.buildSync({output});
-      } else {
-        self.graph = await builder.build({output});
-      }
-    }
+    self.graph = await builder.build({output});
   }
 );
diff --git a/tests/wpt/tests/webnn/pooling.https.any.js b/tests/wpt/tests/webnn/pooling.https.any.js
index df19e577094..c34ae2bba24 100644
--- a/tests/wpt/tests/webnn/pooling.https.any.js
+++ b/tests/wpt/tests/webnn/pooling.https.any.js
@@ -7,4 +7,4 @@
 
 // https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-pool2d
 
-testWebNNOperation(['averagePool2d', 'maxPool2d'], buildOperationWithSingleInput);
\ No newline at end of file
+testWebNNOperation(['averagePool2d', 'l2Pool2d', 'maxPool2d'], buildOperationWithSingleInput);
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/resources/test_data/constant.json b/tests/wpt/tests/webnn/resources/test_data/constant.json
new file mode 100644
index 00000000000..06fe0a7a958
--- /dev/null
+++ b/tests/wpt/tests/webnn/resources/test_data/constant.json
@@ -0,0 +1,754 @@
+{
+  "tests": [
+    {
+      "name": "constant float32 0D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [],
+      "expected": {
+        "name": "output",
+        "shape": [],
+        "data": [
+          0.22992068529129028
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 1D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [24],
+      "expected": {
+        "name": "output",
+        "shape": [24],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
+          1.737428903579712,
+          2.491183042526245,
+          3.2449371814727783,
+          3.9986913204193115,
+          4.752445697784424,
+          5.506199836730957,
+          6.25995397567749,
+          7.013708114624023,
+          7.767462253570557,
+          8.52121639251709,
+          9.274970054626465,
+          10.028724670410156,
+          10.782478332519531,
+          11.536232948303223,
+          12.289986610412598,
+          13.043741226196289,
+          13.797494888305664,
+          14.551249504089355,
+          15.30500316619873,
+          16.058757781982422,
+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 2D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [4, 6],
+      "expected": {
+        "name": "output",
+        "shape": [4, 6],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
+          1.737428903579712,
+          2.491183042526245,
+          3.2449371814727783,
+          3.9986913204193115,
+          4.752445697784424,
+          5.506199836730957,
+          6.25995397567749,
+          7.013708114624023,
+          7.767462253570557,
+          8.52121639251709,
+          9.274970054626465,
+          10.028724670410156,
+          10.782478332519531,
+          11.536232948303223,
+          12.289986610412598,
+          13.043741226196289,
+          13.797494888305664,
+          14.551249504089355,
+          15.30500316619873,
+          16.058757781982422,
+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 3D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 3, 4],
+      "expected": {
+        "name": "output",
+        "shape": [2, 3, 4],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
+          1.737428903579712,
+          2.491183042526245,
+          3.2449371814727783,
+          3.9986913204193115,
+          4.752445697784424,
+          5.506199836730957,
+          6.25995397567749,
+          7.013708114624023,
+          7.767462253570557,
+          8.52121639251709,
+          9.274970054626465,
+          10.028724670410156,
+          10.782478332519531,
+          11.536232948303223,
+          12.289986610412598,
+          13.043741226196289,
+          13.797494888305664,
+          14.551249504089355,
+          15.30500316619873,
+          16.058757781982422,
+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
+          1.737428903579712,
+          2.491183042526245,
+          3.2449371814727783,
+          3.9986913204193115,
+          4.752445697784424,
+          5.506199836730957,
+          6.25995397567749,
+          7.013708114624023,
+          7.767462253570557,
+          8.52121639251709,
+          9.274970054626465,
+          10.028724670410156,
+          10.782478332519531,
+          11.536232948303223,
+          12.289986610412598,
+          13.043741226196289,
+          13.797494888305664,
+          14.551249504089355,
+          15.30500316619873,
+          16.058757781982422,
+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of default float32 type step > 0",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7615746259689331,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22992068529129028,
+          0.9914953112602234,
+          1.7530698776245117,
+          2.5146446228027344,
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+          4.0377936363220215,
+          4.799368381500244,
+          5.560943126678467,
+          6.3225178718566895,
+          7.084092140197754,
+          7.845666885375977,
+          8.6072416305542,
+          9.368816375732422,
+          10.130391120910645,
+          10.891965866088867,
+          11.653539657592773,
+          12.415114402770996,
+          13.176689147949219,
+          13.938263893127441,
+          14.699838638305664,
+          15.461413383483887,
+          16.22298812866211,
+          16.984561920166016,
+          17.746137619018555
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of default float32 type step = 0",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22992068529129028,
+          0.22992068529129028,
+          0.22992068529129028,
+          0.22992068529129028,
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+          0.22992068529129028,
+          0.22992068529129028,
+          0.22992068529129028,
+          0.22992068529129028,
+          0.22992068529129028,
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+          0.22992068529129028,
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+          0.22992068529129028,
+          0.22992068529129028,
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+          0.22992068529129028,
+          0.22992068529129028
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of default float32 type step < 0",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": -0.6248052716255188,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22992068529129028,
+          -0.3948845863342285,
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+          -14.140600204467773
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 5D tensor of default float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 1, 4, 1, 3],
+      "expected": {
+        "name": "output",
+        "shape": [2, 1, 4, 1, 3],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
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+          15.30500316619873,
+          16.058757781982422,
+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of explict float32 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "float32",
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22992068529129028,
+          0.9836748242378235,
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+          16.812511444091797,
+          17.566265106201172
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of float16 type",
+      "inputs": {
+        "start": {
+          "data": 0.22992068529129028,
+          "type": "float32"
+        },
+        "step": {
+          "data": 0.7537541389465332,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "float16",
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0.22998046875,
+          0.98388671875,
+          1.7373046875,
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+          10.03125,
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+          13.046875,
+          13.796875,
+          14.5546875,
+          15.3046875,
+          16.0625,
+          16.8125,
+          17.5625
+        ],
+        "type": "float16"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of int32 type",
+      "inputs": {
+        "start": {
+          "data": 7,
+          "type": "float32"
+        },
+        "step": {
+          "data": 1,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "int32",
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          7,
+          8,
+          9,
+          10,
+          11,
+          12,
+          13,
+          14,
+          15,
+          16,
+          17,
+          18,
+          19,
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+          21,
+          22,
+          23,
+          24,
+          25,
+          26,
+          27,
+          28,
+          29,
+          30
+        ],
+        "type": "int32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of uint32 type",
+      "inputs": {
+        "start": {
+          "data": 7,
+          "type": "float32"
+        },
+        "step": {
+          "data": 1,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "uint32",
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          7,
+          8,
+          9,
+          10,
+          11,
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+          22,
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+          25,
+          26,
+          27,
+          28,
+          29,
+          30
+        ],
+        "type": "uint32"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of int64 type",
+      "inputs": {
+        "start": {
+          "data": 7,
+          "type": "float32"
+        },
+        "step": {
+          "data": 1,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "int64",
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          "7",
+          "8",
+          "9",
+          "10",
+          "11",
+          "12",
+          "13",
+          "14",
+          "15",
+          "16",
+          "17",
+          "18",
+          "19",
+          "20",
+          "21",
+          "22",
+          "23",
+          "24",
+          "25",
+          "26",
+          "27",
+          "28",
+          "29",
+          "30"
+        ],
+        "type": "int64"
+      }
+    },
+    {
+      "name": "constant float32 4D tensor of int8 type step > 0",
+      "inputs": {
+        "start": {
+          "data": -9,
+          "type": "float32"
+        },
+        "step": {
+          "data": 1,
+          "type": "float32"
+        }
+      },
+      "outputShape": [2, 2, 2, 3],
+      "type": "int8",
+      "expected": {
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+          29,
+          30
+        ],
+        "type": "uint8"
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/resources/test_data/l2_pool2d.json b/tests/wpt/tests/webnn/resources/test_data/l2_pool2d.json
new file mode 100644
index 00000000000..bab89e0e394
--- /dev/null
+++ b/tests/wpt/tests/webnn/resources/test_data/l2_pool2d.json
@@ -0,0 +1,1509 @@
+{
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\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/resources/test_data/triangular.json b/tests/wpt/tests/webnn/resources/test_data/triangular.json
new file mode 100644
index 00000000000..652f780d58b
--- /dev/null
+++ b/tests/wpt/tests/webnn/resources/test_data/triangular.json
@@ -0,0 +1,1101 @@
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+      "inputs": {
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+          "type": "float32"
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+      "options": {
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+    {
+      "name": "triangular float32 4D tensor options.diagonal=-1",
+      "inputs": {
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+          "type": "float32"
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+      "options": {
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+      "expected": {
+        "name": "output",
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+        "data": [
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+    {
+      "name": "triangular float32 4D tensor fully zero options.diagonal=3",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
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+      },
+      "options": {
+        "diagonal": 3
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+      "expected": {
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+        "shape": [2, 2, 2, 3],
+        "data": [
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+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor fully copied options.diagonal=-2",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
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+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "diagonal": -2
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          84.9194564819336,
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+          58.862911224365234,
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+          71.37139892578125,
+          -84.96932220458984,
+          -88.97057342529297,
+          77.58269500732422,
+          91.03327178955078
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor options.upper=true options.diagonal=1",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
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+            41.64348602294922,
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+            -84.96932220458984,
+            -88.97057342529297,
+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "upper": true,
+        "diagonal": 1
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0,
+          -86.21631622314453,
+          50.38116455078125,
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+          -84.96932220458984,
+          0,
+          0,
+          91.03327178955078
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor options.upper=false options.diagonal=1",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
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+            -88.97057342529297,
+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "upper": false,
+        "diagonal": 1
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          84.9194564819336,
+          -86.21631622314453,
+          0,
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+          24.678754806518555,
+          -50.355342864990234,
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+          73.36241149902344,
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+          41.64348602294922,
+          58.862911224365234,
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+          42.132598876953125,
+          -70.27587127685547,
+          20.88446617126465,
+          71.37139892578125,
+          0,
+          -88.97057342529297,
+          77.58269500732422,
+          91.03327178955078
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor options.upper=false options.diagonal=-1",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
+            -86.21631622314453,
+            50.38116455078125,
+            -98.47772216796875,
+            -94.51172637939453,
+            -21.42218589782715,
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+            -50.355342864990234,
+            -37.015724182128906,
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+            73.36241149902344,
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+            58.862911224365234,
+            -29.916187286376953,
+            67.48285675048828,
+            42.132598876953125,
+            -70.27587127685547,
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+            71.37139892578125,
+            -84.96932220458984,
+            -88.97057342529297,
+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "upper": false,
+        "diagonal": -1
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0,
+          0,
+          0,
+          -98.47772216796875,
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+          0,
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+          0,
+          0,
+          0,
+          0,
+          -88.97057342529297,
+          0,
+          0
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor fully copied options.upper=false options.diagonal=3",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
+            -86.21631622314453,
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+            -84.96932220458984,
+            -88.97057342529297,
+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "upper": false,
+        "diagonal": 3
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          84.9194564819336,
+          -86.21631622314453,
+          50.38116455078125,
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+          97.25071716308594,
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+          -75.12358856201172,
+          41.64348602294922,
+          58.862911224365234,
+          -29.916187286376953,
+          67.48285675048828,
+          42.132598876953125,
+          -70.27587127685547,
+          20.88446617126465,
+          71.37139892578125,
+          -84.96932220458984,
+          -88.97057342529297,
+          77.58269500732422,
+          91.03327178955078
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "triangular float32 4D tensor fully zero options.upper=false options.diagonal=-2",
+      "inputs": {
+        "input": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            84.9194564819336,
+            -86.21631622314453,
+            50.38116455078125,
+            -98.47772216796875,
+            -94.51172637939453,
+            -21.42218589782715,
+            24.678754806518555,
+            -50.355342864990234,
+            -37.015724182128906,
+            97.25071716308594,
+            73.36241149902344,
+            -75.12358856201172,
+            41.64348602294922,
+            58.862911224365234,
+            -29.916187286376953,
+            67.48285675048828,
+            42.132598876953125,
+            -70.27587127685547,
+            20.88446617126465,
+            71.37139892578125,
+            -84.96932220458984,
+            -88.97057342529297,
+            77.58269500732422,
+            91.03327178955078
+          ],
+          "type": "float32"
+        }
+      },
+      "options": {
+        "upper": false,
+        "diagonal": -2
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0,
+          0
+        ],
+        "type": "float32"
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/wpt/tests/webnn/resources/utils.js b/tests/wpt/tests/webnn/resources/utils.js
index f91d6622d3c..002ddbd706c 100644
--- a/tests/wpt/tests/webnn/resources/utils.js
+++ b/tests/wpt/tests/webnn/resources/utils.js
@@ -1,7 +1,5 @@
 'use strict';
 
-const ExecutionArray = ['sync', 'async'];
-
 // https://webmachinelearning.github.io/webnn/#enumdef-mloperanddatatype
 const TypedArrayDict = {
   // workaround use Uint16 for Float16
@@ -193,7 +191,7 @@ const getMatmulPrecisionTolerance = (resources, operationName) => {
 };
 
 /**
- * Get ULP tolerance of averagePool2d operation.
+ * Get ULP tolerance of averagePool2d or l2Pool2d operation.
  * @param {Object} resources - Resources used for building a graph
  * @param {String} operationName - An operation name
  * @returns {Number} A tolerance number
@@ -292,6 +290,7 @@ const PrecisionMetrics = {
   cast: {ULP: {float32: 1, float16: 1, int32: 0, uint32: 0, int64: 0, int8: 0, uint8: 0}},
   clamp: {ULP: {float32: 0, float16: 0}},
   concat: {ULP: {float32: 0, float16: 0}},
+  constant: {ULP: {float32: 2, float16: 2, int32: 0, uint32: 0, int64: 0, int8: 0, uint8: 0}},
   conv2d: {ULP: {float32: getConv2dPrecisionTolerance, float16: getConv2dPrecisionTolerance}},
   convTranspose2d: {ULP: {float32: getConv2dPrecisionTolerance, float16: getConv2dPrecisionTolerance}},
   // Begin Element-wise binary operations
@@ -340,6 +339,7 @@ const PrecisionMetrics = {
   pad: {ULP: {float32: 0, float16: 0}},
   // Begin Pooling operations
   averagePool2d: {ULP: {float32: getAveragePool2dPrecisionTolerance, float16: getAveragePool2dPrecisionTolerance}},
+  l2Pool2d: {ULP: {float32: getAveragePool2dPrecisionTolerance, float16: getAveragePool2dPrecisionTolerance}},
   maxPool2d: {ULP: {float32: 0, float16: 0}},
   // End Pooling operations
   prelu: {ULP: {float32: 1, float16: 1}},
@@ -365,6 +365,7 @@ const PrecisionMetrics = {
   split: {ULP: {float32: 0, float16: 0}},
   tanh: {ATOL: {float32: 1/1024, float16: 1/512}},
   transpose: {ULP: {float32: 0, float16: 0}},
+  triangular: {ULP: {float32: 0, float16: 0}},
   where: {ULP: {float32: 0, float16: 0}},
 };
 
@@ -635,6 +636,13 @@ const buildConcat = (operationName, builder, resources) => {
   return namedOutputOperand;
 };
 
+const buildConstantRange = (operationName, builder, resources) => {
+  const namedOutputOperand = {};
+  // invoke builder.constant(start, step, outputShape, type)
+  namedOutputOperand[resources.expected.name] = builder[operationName](resources.inputs.start, resources.inputs.step, resources.outputShape, resources.type);
+  return namedOutputOperand;
+};
+
 const buildConvTranspose2d = (operationName, builder, resources) => {
   // MLOperand convTranspose2d(MLOperand input, MLOperand filter, optional MLConvTranspose2dOptions options = {});
   const namedOutputOperand = {};
@@ -793,25 +801,7 @@ const buildGraph = (operationName, builder, resources, buildFunc) => {
 };
 
 /**
- * Build a graph, synchronously compile graph and execute, then check computed results.
- * @param {String} operationName - An operation name
- * @param {MLContext} context - A ML context
- * @param {MLGraphBuilder} builder - A ML graph builder
- * @param {Object} resources - Resources used for building a graph
- * @param {Function} buildFunc - A build function for an operation
- */
-const runSync = (operationName, context, builder, resources, buildFunc) => {
-  // build a graph
-  const [namedOutputOperands, inputs, outputs] = buildGraph(operationName, builder, resources, buildFunc);
-  // synchronously compile the graph up to the output operand
-  const graph = builder.buildSync(namedOutputOperands);
-  // synchronously execute the compiled graph.
-  context.computeSync(graph, inputs, outputs);
-  checkResults(operationName, namedOutputOperands, outputs, resources);
-};
-
-/**
- * Build a graph, asynchronously compile graph and execute, then check computed results.
+ * Build a graph, compile graph and execute, then check computed results.
  * @param {String} operationName - An operation name
  * @param {MLContext} context - A ML context
  * @param {MLGraphBuilder} builder - A ML graph builder
@@ -821,9 +811,9 @@ const runSync = (operationName, context, builder, resources, buildFunc) => {
 const run = async (operationName, context, builder, resources, buildFunc) => {
   // build a graph
   const [namedOutputOperands, inputs, outputs] = buildGraph(operationName, builder, resources, buildFunc);
-  // asynchronously compile the graph up to the output operand
+  // compile the graph up to the output operand
   const graph = await builder.build(namedOutputOperands);
-  // asynchronously execute the compiled graph
+  // execute the compiled graph
   const result = await context.compute(graph, inputs, outputs);
   checkResults(operationName, namedOutputOperands, result.outputs, resources);
 };
@@ -842,41 +832,18 @@ const testWebNNOperation = (operationName, buildFunc, deviceType = 'cpu') => {
     operationNameArray = operationName;
   }
 
-  ExecutionArray.forEach(executionType => {
-    const isSync = executionType === 'sync';
-    if (self.GLOBAL.isWindow() && isSync) {
-      return;
-    }
-    let context;
-    let builder;
-    if (isSync) {
-      // test sync
-      operationNameArray.forEach((subOperationName) => {
-        const tests = loadTests(subOperationName);
-        setup(() => {
-          context = navigator.ml.createContextSync({deviceType});
-          builder = new MLGraphBuilder(context);
-        });
-        for (const subTest of tests) {
-          test(() => {
-            runSync(subOperationName, context, builder, subTest, buildFunc);
-          }, `${subTest.name} / ${executionType}`);
-        }
-      });
-    } else {
-      // test async
-      operationNameArray.forEach((subOperationName) => {
-        const tests = loadTests(subOperationName);
-        promise_setup(async () => {
-          context = await navigator.ml.createContext({deviceType});
-          builder = new MLGraphBuilder(context);
-        });
-        for (const subTest of tests) {
-          promise_test(async () => {
-            await run(subOperationName, context, builder, subTest, buildFunc);
-          }, `${subTest.name} / ${executionType}`);
-        }
-      });
+  let context;
+  let builder;
+  operationNameArray.forEach((subOperationName) => {
+    const tests = loadTests(subOperationName);
+    promise_setup(async () => {
+      context = await navigator.ml.createContext({deviceType});
+      builder = new MLGraphBuilder(context);
+    });
+    for (const subTest of tests) {
+      promise_test(async () => {
+        await run(subOperationName, context, builder, subTest, buildFunc);
+      }, `${subTest.name}`);
     }
   });
 };
diff --git a/tests/wpt/tests/webnn/triangular.https.any.js b/tests/wpt/tests/webnn/triangular.https.any.js
new file mode 100644
index 00000000000..1f1af6dcab6
--- /dev/null
+++ b/tests/wpt/tests/webnn/triangular.https.any.js
@@ -0,0 +1,10 @@
+// META: title=test WebNN API triangular operation
+// META: global=window,dedicatedworker
+// META: script=./resources/utils.js
+// META: timeout=long
+
+'use strict';
+
+// https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-triangular
+
+testWebNNOperation('triangular', buildOperationWithSingleInput);
\ No newline at end of file
diff --git a/tests/wpt/tests/webrtc/RTCConfiguration-iceTransportPolicy.html b/tests/wpt/tests/webrtc/RTCConfiguration-iceTransportPolicy.html
index ebc79048a3a..b84e6a30db0 100644
--- a/tests/wpt/tests/webrtc/RTCConfiguration-iceTransportPolicy.html
+++ b/tests/wpt/tests/webrtc/RTCConfiguration-iceTransportPolicy.html
@@ -128,7 +128,12 @@
     t.add_cleanup(() => offerer.close());
 
     offerer.addEventListener('icecandidate',
-        e => assert_equals(e.candidate, null, 'Should get no ICE candidates'));
+        e => {
+          if (e.candidate) {
+            assert_equals(e.candidate.candidate, '', 'Should get no ICE candidates')
+          }
+        }
+    );
 
     offerer.addTransceiver('audio');
     await offerer.setLocalDescription();
@@ -142,8 +147,13 @@
     t.add_cleanup(() => offerer.close());
     t.add_cleanup(() => answerer.close());
 
-    answerer.addEventListener('icecandidate',
-        e => assert_equals(e.candidate, null, 'Should get no ICE candidates'));
+    offerer.addEventListener('icecandidate',
+        e => {
+          if (e.candidate) {
+            assert_equals(e.candidate.candidate, '', 'Should get no ICE candidates')
+          }
+        }
+    );
 
     offerer.addTransceiver('audio');
     const offer = await offerer.createOffer();
@@ -175,9 +185,14 @@
     offerer.setConfiguration({iceTransportPolicy: 'relay'});
 
     offerer.addEventListener('icecandidate',
-        e => assert_equals(e.candidate, null, 'Should get no ICE candidates'));
+        e => {
+          if (e.candidate) {
+            assert_equals(e.candidate.candidate, '', 'Should get no ICE candidates')
+          }
+        }
+    );
 
-    await Promise.all([
+     await Promise.all([
       exchangeOfferAnswer(offerer, answerer),
       waitForIceStateChange(offerer, ['failed']),
       waitForIceStateChange(answerer, ['failed']),
@@ -201,9 +216,13 @@
     exchangeIceCandidates(offerer, answerer);
 
     const checkNoCandidate =
-        e => assert_equals(e.candidate, null, 'Should get no ICE candidates');
+        e => {
+          if (e.candidate) {
+            assert_equals(e.candidate.candidate, '', 'Should get no ICE candidates')
+          }
+        };
 
-    offerer.addEventListener('icecandidate', checkNoCandidate);
+     offerer.addEventListener('icecandidate', checkNoCandidate);
 
     await Promise.all([
       exchangeOfferAnswer(offerer, answerer),
diff --git a/tests/wpt/tests/webrtc/RTCIceTransport.html b/tests/wpt/tests/webrtc/RTCIceTransport.html
index fe12c384e5e..e80418bdc45 100644
--- a/tests/wpt/tests/webrtc/RTCIceTransport.html
+++ b/tests/wpt/tests/webrtc/RTCIceTransport.html
@@ -1,9 +1,11 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCIceTransport</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="RTCPeerConnection-helper.js"></script>
+<script src='RTCConfiguration-helper.js'></script>
 <script>
   'use strict';
 
@@ -58,7 +60,7 @@
     assert_true(dtlsTransport instanceof RTCDtlsTransport,
       'Expect sctp.transport to be an RTCDtlsTransport');
 
-    const iceTransport = dtlsTransport.iceTransport;
+    const {iceTransport} = dtlsTransport;
     assert_true(iceTransport instanceof RTCIceTransport,
       'Expect dtlsTransport.transport to be an RTCIceTransport');
 
@@ -162,7 +164,7 @@
       assert_equals(iceTransport2.role, 'controlled',
         `Expect answerer's iceTransport to take the controlled role`);
     });
-  }, 'Two connected iceTransports should has matching local/remote candidates returned');
+  }, 'Two connected iceTransports should have matching local/remote candidates returned');
 
   promise_test(t => {
     const pc1 = new RTCPeerConnection();
@@ -190,4 +192,280 @@
     });
   }, 'Unconnected iceTransport should have empty remote candidates and selected pair');
 
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    const {iceTransport} = transceiver.sender.transport;
+    assert_equals(iceTransport.state, 'new');
+    assert_equals(iceTransport.gatheringState, 'new');
+  }, 'RTCIceTransport should be in state "new" initially');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    const {iceTransport} = transceiver.sender.transport;
+    assert_equals(await nextGatheringState(iceTransport), 'gathering');
+    assert_equals(await nextGatheringState(iceTransport), 'complete');
+  }, 'RTCIceTransport should transition to "gathering" then "complete", after sLD');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    const {iceTransport} = transceiver.sender.transport;
+    assert_equals(await nextGatheringState(iceTransport), 'gathering');
+    pc1.close();
+    assert_equals(iceTransport.gatheringState, 'gathering');
+    const result = await Promise.race([
+      gatheringStateReached(iceTransport, 'complete'),
+      new Promise(r => t.step_timeout(r, 1000))]);
+    assert_equals(result, undefined, `Did not expect a statechange after PC.close(), but got one. state is "${result}"`);
+  }, 'PC.close() should not cause the RTCIceTransport gathering state to transition to "complete"');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection({bundlePolicy: 'max-bundle'});
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    pc1.createDataChannel('test');
+    // TODO: If the spec settles on exposing the sctp transport in
+    // have-local-offer, we won't need this audio transceiver hack.
+    // See https://github.com/w3c/webrtc-pc/issues/2898 and
+    // https://github.com/w3c/webrtc-pc/issues/2899
+    const transceiver = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    const {iceTransport} = transceiver.sender.transport;
+    assert_equals(await nextGatheringState(iceTransport), 'gathering');
+    assert_equals(await nextGatheringState(iceTransport), 'complete');
+    // TODO: Maybe, maybe not.
+    assert_not_equals(pc1.sctp, null, 'pc1.sctp should be set after sLD');
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    assert_equals(pc1.sctp.transport.iceTransport, transceiver.sender.transport.iceTransport);
+  }, 'RTCIceTransport should transition to "gathering", then "complete" after sLD (DataChannel case)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+
+    const {sender} = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    // Copy the SDP before it has candidate attrs
+    const offer = pc1.localDescription;
+    const checkingReached = connectionStateReached(sender.transport.iceTransport, 'checking');
+
+    let result = await Promise.race([checkingReached, new Promise(r => t.step_timeout(r, 1000))]);
+    assert_equals(result, undefined, `Did not expect a statechange right after sLD(offer), but got one. state is "${result}"`);
+
+    await pc2.setRemoteDescription(offer);
+
+    const firstPc2CandidatePromise =
+      new Promise(r => pc2.onicecandidate = e => r(e.candidate));
+
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+
+    result = await Promise.race([checkingReached, new Promise(r => t.step_timeout(r, 1000))]);
+    assert_equals(result, undefined, `Did not expect a statechange callback after sRD(answer), but got one. state is "${result}"`);
+
+    const candidate = await firstPc2CandidatePromise;
+    pc1.addIceCandidate(candidate);
+
+    await checkingReached;
+  }, 'RTCIceTransport should not transition to "checking" until after the answer is set _and_ the first remote candidate is received');
+
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const {sender} = pc1.addTransceiver('audio');
+    exchangeIceCandidates(pc1, pc2);
+    const gatheringDone = Promise.all([gatheringStateReached(pc1, 'complete'), gatheringStateReached(pc2, 'complete')]);
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    assert_equals(await nextConnectionState(sender.transport.iceTransport), 'checking');
+    assert_equals(await nextConnectionState(sender.transport.iceTransport), 'connected');
+    await gatheringDone;
+    pc2.close();
+    await connectionStateReached(sender.transport.iceTransport, 'disconnected');
+  }, 'RTCIceTransport should transition to "disconnected" if packets stop flowing');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    pc1.createDataChannel('test');
+    exchangeIceCandidates(pc1, pc2);
+    const gatheringDone = Promise.all([gatheringStateReached(pc1, 'complete'), gatheringStateReached(pc2, 'complete')]);
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    const {sctp} = pc1;
+    assert_equals(await nextConnectionState(sctp.transport.iceTransport), 'checking');
+    assert_equals(await nextConnectionState(sctp.transport.iceTransport), 'connected');
+    await gatheringDone;
+    pc2.close();
+    await connectionStateReached(sctp.transport.iceTransport, 'disconnected');
+  }, 'RTCIceTransport should transition to "disconnected" if packets stop flowing (DataChannel case)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const {sender} = pc1.addTransceiver('audio');
+    await pc1.setLocalDescription();
+    const {iceTransport} = sender.transport;
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+
+    pc1.restartIce();
+
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+
+    assert_equals(sender.transport.iceTransport, iceTransport, 'ICE restart should not result in a different ICE transport');
+  }, 'Local ICE restart should not result in a different ICE transport');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    pc1.createDataChannel('test');
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    const {iceTransport} = pc1.sctp.transport;
+
+    pc1.restartIce();
+
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+
+    assert_equals(pc1.sctp.transport.iceTransport, iceTransport, 'ICE restart should not result in a different ICE transport');
+  }, 'Local ICE restart should not result in a different ICE transport (DataChannel case)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const {sender} = pc1.addTransceiver('audio');
+
+    await pc1.setLocalDescription();
+    const {iceTransport} = sender.transport;
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+
+    pc2.restartIce();
+
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc1.localDescription);
+
+    assert_equals(sender.transport.iceTransport, iceTransport, 'ICE restart should not result in a different ICE transport');
+  }, 'Remote ICE restart should not result in a different ICE transport');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    pc1.createDataChannel('test');
+
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    const {iceTransport} = pc1.sctp.transport;
+
+    pc2.restartIce();
+
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc1.localDescription);
+
+    assert_equals(pc1.sctp.transport.iceTransport, iceTransport, 'ICE restart should not result in a different ICE transport');
+  }, 'Remote ICE restart should not result in a different ICE transport (DataChannel case)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    // Add two transceivers, one audio and one video. The default bundlePolicy
+    // ("balanced") will result in each being offered with its own transport,
+    // but allowing the answerer to bundle the second transceiver on the
+    // transport of the first, which the answerer will do by default.
+    const audioTransceiver = pc1.addTransceiver('audio');
+    const videoTransceiver = pc1.addTransceiver('video');
+    pc1.createDataChannel('test');
+
+    await pc1.setLocalDescription();
+    const audioIceTransport = audioTransceiver.sender.transport.iceTransport;
+    const videoIceTransport = videoTransceiver.sender.transport.iceTransport;
+
+    assert_not_equals(audioIceTransport, videoIceTransport, 'audio and video should start out with different transports');
+
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    const sctpIceTransport = pc1.sctp.transport.iceTransport;
+
+    assert_equals(videoTransceiver.sender.transport.iceTransport, audioIceTransport, 'After negotiation, the video sender should use the bundle ICE transport from the audio sender');
+    assert_equals(pc1.sctp.transport.iceTransport, audioIceTransport, 'After negotiation, the datachannel should use the bundle ICE transport from the audio sender');
+    assert_not_equals(videoIceTransport.state, 'closed', 'Completion of offer/answer should not close the unused ICE transport immediately');
+
+    await connectionStateReached(videoIceTransport, 'closed');
+  }, 'RTCIceTransport should transition to "closed" if the underlying transport is closed because the answer used bundle');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const {sender} = pc1.addTransceiver('audio');
+    exchangeIceCandidates(pc1, pc2);
+    const gatheringDone = Promise.all([gatheringStateReached(pc1, 'complete'), gatheringStateReached(pc2, 'complete')]);
+    await pc1.setLocalDescription();
+    const {iceTransport} = sender.transport;
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    assert_equals(await nextConnectionState(iceTransport), 'checking');
+    assert_equals(await nextConnectionState(iceTransport), 'connected');
+    await gatheringDone;
+
+    const closedEvent = connectionStateReached(iceTransport, 'closed');
+    pc1.close();
+    assert_equals(sender.transport.iceTransport, iceTransport, 'PC.close() should not unset the sender transport');
+    assert_equals(iceTransport.state, 'closed', 'pc.close() should close the sender transport synchronously');
+    const result = await Promise.race([closedEvent, new Promise(r => t.step_timeout(r, 1000))]);
+    assert_equals(result, undefined, 'statechange event should not fire when transitioning to closed due to PC.close()');
+  }, 'RTCIceTransport should synchronously transition to "closed" with no event if the underlying transport is closed due to PC.close()');
+
 </script>
diff --git a/tests/wpt/tests/webrtc/RTCPeerConnection-explicit-rollback-iceGatheringState.html b/tests/wpt/tests/webrtc/RTCPeerConnection-explicit-rollback-iceGatheringState.html
index e39b985bef2..a28275047e4 100644
--- a/tests/wpt/tests/webrtc/RTCPeerConnection-explicit-rollback-iceGatheringState.html
+++ b/tests/wpt/tests/webrtc/RTCPeerConnection-explicit-rollback-iceGatheringState.html
@@ -13,8 +13,7 @@ promise_test(async t => {
   const pc2 = new RTCPeerConnection();
   t.add_cleanup(() => pc2.close());
   pc1.addTransceiver('audio', { direction: 'recvonly' });
-  await initialOfferAnswerWithIceGatheringStateTransitions(
-      pc1, pc2);
+  await initialOfferAnswerWithIceGatheringStateTransitions(pc1, pc2);
   await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
   await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
   expectNoMoreGatheringStateChanges(t, pc1);
@@ -23,31 +22,73 @@ promise_test(async t => {
 }, 'rolling back an ICE restart when gathering is complete should not result in iceGatheringState changes');
 
 promise_test(async t => {
-  const pc = new RTCPeerConnection();
-  t.add_cleanup(() => pc.close());
-  pc.addTransceiver('audio', { direction: 'recvonly' });
-  await pc.setLocalDescription(
-    await pc.createOffer());
-  await iceGatheringStateTransitions(pc, 'gathering', 'complete');
-  await pc.setLocalDescription({type: 'rollback'});
-  await iceGatheringStateTransitions(pc, 'new');
-}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "complete"');
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+  pc1.createDataChannel('test');
+  await initialOfferAnswerWithIceGatheringStateTransitions(pc1, pc2);
+  await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
+  await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
+  expectNoMoreGatheringStateChanges(t, pc1);
+  await pc1.setLocalDescription({type: 'rollback'});
+  await new Promise(r => t.step_timeout(r, 1000));
+}, 'rolling back an ICE restart when gathering is complete should not result in iceGatheringState changes (DataChannel case)');
 
 promise_test(async t => {
   const pc = new RTCPeerConnection();
   t.add_cleanup(() => pc.close());
   pc.addTransceiver('audio', { direction: 'recvonly' });
-  await pc.setLocalDescription(
-    await pc.createOffer());
+  await pc.setLocalDescription();
+  await iceGatheringStateTransitions(pc, 'gathering', 'complete');
+  const backToNew = iceGatheringStateTransitions(pc, 'new');
+  await pc.setLocalDescription({type: 'rollback'});
+  await backToNew;
+}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "complete"');
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  pc.createDataChannel('test');
+  await pc.setLocalDescription();
+  await iceGatheringStateTransitions(pc, 'gathering', 'complete');
+  const backToNew = iceGatheringStateTransitions(pc, 'new');
+  await pc.setLocalDescription({type: 'rollback'});
+  await backToNew;
+}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "complete" (DataChannel case)');
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  pc.addTransceiver('audio', { direction: 'recvonly' });
+  await pc.setLocalDescription();
   await iceGatheringStateTransitions(pc, 'gathering');
+  const backToNew = Promise.allSettled([
+    iceGatheringStateTransitions(pc, 'new'),
+    iceGatheringStateTransitions(pc, 'complete', 'new')]);
   await pc.setLocalDescription({type: 'rollback'});
   // We might go directly to 'new', or we might go to 'complete' first,
   // depending on timing. Allow either.
-  const results = await Promise.allSettled([
-    iceGatheringStateTransitions(pc, 'new'),
-    iceGatheringStateTransitions(pc, 'complete', 'new')]);
+  const results = await backToNew;
   assert_true(results.some(result => result.status == 'fulfilled'),
     'ICE gathering state should go back to "new", possibly through "complete"');
 }, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "gathering"');
 
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  pc.createDataChannel('test');
+  await pc.setLocalDescription();
+  await iceGatheringStateTransitions(pc, 'gathering');
+  const backToNew = Promise.allSettled([
+    iceGatheringStateTransitions(pc, 'new'),
+    iceGatheringStateTransitions(pc, 'complete', 'new')]);
+  await pc.setLocalDescription({type: 'rollback'});
+  // We might go directly to 'new', or we might go to 'complete' first,
+  // depending on timing. Allow either.
+  const results = await backToNew;
+  assert_true(results.some(result => result.status == 'fulfilled'),
+    'ICE gathering state should go back to "new", possibly through "complete"');
+}, 'setLocalDescription(rollback) of original offer should cause iceGatheringState to reach "new" when starting in "gathering" (DataChannel case)');
+
 </script>
diff --git a/tests/wpt/tests/webrtc/RTCPeerConnection-helper.js b/tests/wpt/tests/webrtc/RTCPeerConnection-helper.js
index 92e4ccfa43a..6f35fde76ce 100644
--- a/tests/wpt/tests/webrtc/RTCPeerConnection-helper.js
+++ b/tests/wpt/tests/webrtc/RTCPeerConnection-helper.js
@@ -701,6 +701,7 @@ const iceGatheringStateTransitions = async (pc, ...states) => {
       }, {once: true});
     });
   }
+  return states;
 };
 
 const initialOfferAnswerWithIceGatheringStateTransitions =
@@ -718,6 +719,14 @@ const initialOfferAnswerWithIceGatheringStateTransitions =
       await pc2Transitions;
     };
 
+const expectNoMoreIceConnectionStateChanges = async (t, pc) => {
+  pc.oniceconnectionstatechange =
+      t.step_func(() => {
+        assert_unreached(
+            'Should not get an iceconnectionstatechange right now!');
+      });
+};
+
 const expectNoMoreGatheringStateChanges = async (t, pc) => {
   pc.onicegatheringstatechange =
       t.step_func(() => {
@@ -726,6 +735,132 @@ const expectNoMoreGatheringStateChanges = async (t, pc) => {
       });
 };
 
+function gatheringStateReached(object, state) {
+  if (object instanceof RTCIceTransport) {
+    return new Promise(r =>
+      object.addEventListener("gatheringstatechange", function listener() {
+        if (object.gatheringState == state) {
+          object.removeEventListener("gatheringstatechange", listener);
+          r(state);
+        }
+      })
+    );
+  } else if (object instanceof RTCPeerConnection) {
+    return new Promise(r =>
+      object.addEventListener("icegatheringstatechange", function listener() {
+        if (object.iceGatheringState == state) {
+          object.removeEventListener("icegatheringstatechange", listener);
+          r(state);
+        }
+      })
+    );
+  } else {
+    throw "First parameter is neither an RTCIceTransport nor an RTCPeerConnection";
+  }
+}
+
+function nextGatheringState(object) {
+  if (object instanceof RTCIceTransport) {
+    return new Promise(resolve =>
+      object.addEventListener(
+        "gatheringstatechange",
+        () => resolve(object.gatheringState),
+        { once: true }
+      )
+    );
+  } else if (object instanceof RTCPeerConnection) {
+    return new Promise(resolve =>
+      object.addEventListener(
+        "icegatheringstatechange",
+        () => resolve(object.iceGatheringState),
+        { once: true }
+      )
+    );
+  } else {
+    throw "First parameter is neither an RTCIceTransport nor an RTCPeerConnection";
+  }
+}
+
+function emptyCandidate(pc) {
+  return new Promise(r =>
+    pc.addEventListener("icecandidate", function listener(e) {
+      if (e.candidate && e.candidate.candidate == "") {
+        pc.removeEventListener("icecandidate", listener);
+        r(e);
+      }
+    })
+  );
+}
+
+function nullCandidate(pc) {
+  return new Promise(r =>
+    pc.addEventListener("icecandidate", function listener(e) {
+      if (!e.candidate) {
+        pc.removeEventListener("icecandidate", listener);
+        r(e);
+      }
+    })
+  );
+}
+
+function connectionStateReached(object, state) {
+  if (object instanceof RTCIceTransport || object instanceof RTCDtlsTransport) {
+    return new Promise(resolve =>
+      object.addEventListener("statechange", function listener() {
+        if (object.state == state) {
+          object.removeEventListener("statechange", listener);
+          resolve(state);
+        }
+      })
+    );
+  } else if (object instanceof RTCPeerConnection) {
+    return new Promise(resolve =>
+      object.addEventListener("connectionstatechange", function listener() {
+        if (object.connectionState == state) {
+          object.removeEventListener("connectionstatechange", listener);
+          resolve(state);
+        }
+      })
+    );
+  } else {
+    throw "First parameter is neither an RTCIceTransport, an RTCDtlsTransport, nor an RTCPeerConnection";
+  }
+}
+
+function nextConnectionState(object) {
+  if (object instanceof RTCIceTransport || object instanceof RTCDtlsTransport) {
+    return new Promise(resolve =>
+      object.addEventListener("statechange", () => resolve(object.state), {
+        once: true,
+      })
+    );
+  } else if (object instanceof RTCPeerConnection) {
+    return new Promise(resolve =>
+      object.addEventListener(
+        "connectionstatechange",
+        () => resolve(object.connectionState),
+        { once: true }
+      )
+    );
+  } else {
+    throw "First parameter is neither an RTCIceTransport, an RTCDtlsTransport, nor an RTCPeerConnection";
+  }
+}
+
+function nextIceConnectionState(pc) {
+  if (pc instanceof RTCPeerConnection) {
+    return new Promise(resolve =>
+      pc.addEventListener(
+        "iceconnectionstatechange",
+        () => resolve(pc.iceConnectionState),
+        { once: true }
+      )
+    );
+  } else {
+    throw "First parameter is not an RTCPeerConnection";
+  }
+}
+
 async function queueAWebrtcTask() {
   const pc = new RTCPeerConnection();
   pc.addTransceiver('audio');
diff --git a/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState-disconnected.https.html b/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState-disconnected.https.html
index af55a0c0035..04c2b9c333c 100644
--- a/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState-disconnected.https.html
+++ b/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState-disconnected.https.html
@@ -27,4 +27,46 @@
     // TODO: this should eventually transition to failed but that takes
     // somewhat long (15-30s) so is not testable.
   }, 'ICE goes to disconnected if the other side goes away');
+
+  promise_test(async t => {
+    const caller = new RTCPeerConnection();
+    t.add_cleanup(() => caller.close());
+    const callee = new RTCPeerConnection();
+    t.add_cleanup(() => callee.close());
+    caller.addTransceiver('audio', {direction: 'sendrecv'});
+    exchangeIceCandidates(caller, callee);
+    await exchangeOfferAnswer(caller, callee);
+    await listenToIceConnected(caller);
+
+    // Now, we pull a fast one, and convince callee to abandon the transport
+    // without telling caller.
+    await caller.setLocalDescription();
+    await callee.setRemoteDescription(caller.localDescription);
+    const staleAnswer = await callee.createAnswer();
+    await callee.setRemoteDescription({type: 'rollback', sdp: ''});
+
+    const mlineRegex = /m=audio [0-9]+ /;
+    const mungedOfferSdp = caller.localDescription.sdp
+      .replace(mlineRegex, 'm=audio 0 ')
+      .replace('BUNDLE', 'BUNGLE'); // Avoid "But that mid is rejected!" errors
+
+    // callee gets the munged reoffer with a rejected m-section, caller gets a
+    // stale answer that was made before callee saw the rejected m-section.
+    await callee.setRemoteDescription({type: 'offer', sdp: mungedOfferSdp});
+    await callee.setLocalDescription();
+    await caller.setRemoteDescription(staleAnswer);
+    assert_equals(await nextIceConnectionState(caller), 'disconnected');
+
+    // Now, let's fix this with an ICE restart! callee has already negotiated
+    // a rejection of the first m-section, so it will tolerate it being
+    // revived.
+    caller.restartIce();
+    await caller.setLocalDescription();
+    await callee.setRemoteDescription(caller.localDescription);
+    await callee.setLocalDescription();
+    await caller.setRemoteDescription(callee.localDescription);
+    assert_equals(await nextIceConnectionState(caller), 'checking');
+    assert_equals(await nextIceConnectionState(caller), 'connected');
+  }, 'ICE restart when ICE is disconnected results in checking, then connected');
+
 </script>
diff --git a/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState.https.html b/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
index 5361cb2c1af..9e0afb7ce69 100644
--- a/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
+++ b/tests/wpt/tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
@@ -411,4 +411,18 @@ promise_test(async t => {
   assert_true(pc1.iceStates.length >= 2);
   assert_equals(pc1.iceStates[1], 'checking');
 }, 'iceConnectionState can go to checking without explictly calling addIceCandidate');
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  const pc2 = new RTCPeerConnection();
+  exchangeIceCandidates(pc1, pc2);
+  const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+  await exchangeOfferAnswer(pc1, pc2);
+  await listenToIceConnected(pc1);
+  expectNoMoreIceConnectionStateChanges(t, pc1);
+  pc1.restartIce();
+  await exchangeOfferAnswer(pc1, pc2);
+  await new Promise(r => t.step_timeout(r, 1000));
+}, 'ICE restart does not result in a transition back to checking');
+
 </script>
diff --git a/tests/wpt/tests/webrtc/RTCPeerConnection-iceGatheringState.html b/tests/wpt/tests/webrtc/RTCPeerConnection-iceGatheringState.html
index 6afaf0fbfbd..32a68953bc5 100644
--- a/tests/wpt/tests/webrtc/RTCPeerConnection-iceGatheringState.html
+++ b/tests/wpt/tests/webrtc/RTCPeerConnection-iceGatheringState.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCPeerConnection.prototype.iceGatheringState</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -115,6 +116,67 @@
     await new Promise(r => t.step_timeout(r, 500));
   }, 'setLocalDescription() with no transports should not cause iceGatheringState to change');
 
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
+    assert_true(pc1.localDescription.sdp.includes('a=end-of-candidates'));
+  }, 'local description should have a=end-of-candidates when gathering completes');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    const iceTransport = transceiver.sender.transport.iceTransport;
+
+    // This test code assumes that https://github.com/w3c/webrtc-pc/pull/2894
+    // will be merged. The spec will say to dispatch two tasks; one that fires
+    // the empty candidate, and another that fires
+    // RTCIceTransport.gatheringstatechange, then
+    // RTCPeerConnection.icegatheringstatechange, then the global null
+    // candidate.
+    while (true) {
+      const {candidate} = await new Promise(r => pc1.onicecandidate = r);
+      assert_not_equals(candidate, null, 'Global null candidate event should not fire yet');
+      if (candidate.candidate == '') {
+        break;
+      }
+    }
+    assert_equals(iceTransport.gatheringState, 'gathering');
+    assert_equals(pc1.iceGatheringState, 'gathering');
+
+    // Now, we test the stuff that happens in the second queued task.
+    const events = [];
+    await new Promise(r => {
+      iceTransport.ongatheringstatechange = () => {
+        assert_equals(iceTransport.gatheringState, 'complete');
+        assert_equals(pc1.iceGatheringState, 'complete');
+        events.push('gatheringstatechange');
+      };
+      pc1.onicegatheringstatechange = () => {
+        assert_equals(iceTransport.gatheringState, 'complete');
+        assert_equals(pc1.iceGatheringState, 'complete');
+        events.push('icegatheringstatechange');
+      }
+      pc1.onicecandidate = e => {
+        assert_equals(e.candidate, null);
+        assert_equals(iceTransport.gatheringState, 'complete');
+        assert_equals(pc1.iceGatheringState, 'complete');
+        events.push('icecandidate');
+        r();
+      };
+    });
+
+    assert_array_equals(events, [
+      'gatheringstatechange',
+      'icegatheringstatechange',
+      'icecandidate'
+    ], 'events must be fired on the same task in this order');
+}, 'gathering state and candidate callbacks should fire in the correct order');
+
   promise_test(async t => {
     const pc1 = new RTCPeerConnection();
     t.add_cleanup(() => pc1.close());
@@ -125,7 +187,33 @@
         pc1, pc2);
     await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
     await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
-  }, 'setLocalDescription(reoffer) with a new transport should cause iceGatheringState to go to "checking" and then "complete"');
+  }, 'setLocalDescription(reoffer) with a restarted transport should cause iceGatheringState to go to "gathering" and then "complete"');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    pc1.addTransceiver('audio', { direction: 'recvonly' });
+    pc1.addTransceiver('video', { direction: 'recvonly' });
+    exchangeIceCandidates(pc1, pc2);
+    await pc1.setLocalDescription();
+    const firstGather = Promise.all([
+      iceGatheringStateTransitions(pc1, 'gathering', 'complete'),
+      iceGatheringStateTransitions(pc2, 'gathering', 'complete')]);
+    const mungedOffer = {type: 'offer', sdp: pc1.localDescription.sdp.replace('BUNDLE', 'BUNGLE')};
+    await pc2.setRemoteDescription(mungedOffer);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    // Let gathering finish, so we don't have two generations gathering at once
+    // This can cause errors depending on timing.
+    await firstGather;
+    await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
+    // We only do this so we don't get errors in addCandidate. We don't want
+    // to wait for it, because we might miss the gathering transitions.
+    pc2.setRemoteDescription(pc1.localDescription);
+    await iceGatheringStateTransitions(pc1, 'gathering', 'complete');
+  }, 'setLocalDescription(reoffer) with two restarted transports should cause iceGatheringState to go to "gathering" and then "complete"');
 
   promise_test(async t => {
     const pc1 = new RTCPeerConnection();
diff --git a/tests/wpt/tests/webrtc/RTCRtpReceiver-getContributingSources.https.html b/tests/wpt/tests/webrtc/RTCRtpReceiver-getContributingSources.https.html
index 7245d477cc8..a5913f6e840 100644
--- a/tests/wpt/tests/webrtc/RTCRtpReceiver-getContributingSources.https.html
+++ b/tests/wpt/tests/webrtc/RTCRtpReceiver-getContributingSources.https.html
@@ -22,6 +22,13 @@ async function connectAndExpectNoCsrcs(t, kind) {
   const trackEvent = await exchangeOfferAndListenToOntrack(t, pc1, pc2);
   await exchangeAnswer(pc1, pc2);
 
+  // Some browsers might need an audio element attached to the DOM.
+  const element = document.createElement(kind);
+  element.autoplay = true;
+  element.srcObject = trackEvent.streams[0];
+  document.body.appendChild(element);
+  t.add_cleanup(() => { document.body.removeChild(element) });
+
   assert_array_equals(trackEvent.receiver.getContributingSources(), []);
 }
 
diff --git a/tests/wpt/tests/webrtc/RTCRtpReceiver-getSynchronizationSources.https.html b/tests/wpt/tests/webrtc/RTCRtpReceiver-getSynchronizationSources.https.html
index 8436a44ebcd..cb5336f3f35 100644
--- a/tests/wpt/tests/webrtc/RTCRtpReceiver-getSynchronizationSources.https.html
+++ b/tests/wpt/tests/webrtc/RTCRtpReceiver-getSynchronizationSources.https.html
@@ -23,6 +23,14 @@ async function initiateSingleTrackCallAndReturnReceiver(t, kind) {
   exchangeIceCandidates(pc1, pc2);
   const trackEvent = await exchangeOfferAndListenToOntrack(t, pc1, pc2);
   await exchangeAnswer(pc1, pc2);
+
+  // Some browsers might need an audio element attached to the DOM.
+  const element = document.createElement(kind);
+  element.autoplay = true;
+  element.srcObject = trackEvent.streams[0];
+  document.body.appendChild(element);
+  t.add_cleanup(() => { document.body.removeChild(element) });
+
   return trackEvent.receiver;
 }
 
diff --git a/tests/wpt/tests/webrtc/RTCRtpReceiver.https.html b/tests/wpt/tests/webrtc/RTCRtpReceiver.https.html
new file mode 100644
index 00000000000..eea013140f3
--- /dev/null
+++ b/tests/wpt/tests/webrtc/RTCRtpReceiver.https.html
@@ -0,0 +1,96 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>RTCRtpReceiver</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  'use strict';
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    assert_equals(transceiver.receiver.transport, null);
+  }, 'RTCRtpReceiver should have a null transport initially');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_true(transceiver.receiver.transport instanceof RTCDtlsTransport);
+  }, 'RTCRtpReceiver should have a transport after sLD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    await pc1.setLocalDescription({type: 'rollback', sdp: ''});
+    assert_equals(transceiver.receiver.transport, null);
+  }, 'RTCRtpReceiver should have a null transport after rollback of sLD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const receiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc2.setRemoteDescription(await pc1.createOffer());
+    const transceiver = pc2.getTransceivers()[0];
+    assert_equals(transceiver.receiver.transport, null);
+  }, 'RTCRtpReceiver should have a null transport after sRD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_true(transceiver.sender.transport instanceof RTCDtlsTransport);
+    assert_true(transceiver.receiver.transport instanceof RTCDtlsTransport);
+    assert_equals(transceiver.receiver.transport, transceiver.sender.transport);
+  }, 'RTCRtpReceiver should have the same transport object as its corresponding RTCRtpSender');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection({bundlePolicy: 'max-bundle'});
+    t.add_cleanup(() => pc1.close());
+    const audioTransceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    const videoTransceiver = pc1.addTransceiver('video', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_equals(videoTransceiver.receiver.transport, audioTransceiver.receiver.transport);
+  }, 'RTCRtpReceivers that share a bundle transport should have the same transport object');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection({bundlePolicy: 'max-compat'});
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const audioTransceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    const videoTransceiver = pc1.addTransceiver('video', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_not_equals(videoTransceiver.receiver.transport, audioTransceiver.receiver.transport);
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc1.setRemoteDescription(await pc2.createAnswer());
+    // pc2 will accept the bundle, so these should be the same now
+    assert_equals(videoTransceiver.receiver.transport, audioTransceiver.receiver.transport);
+  }, 'RTCRtpReceivers that do not necessarily share a bundle transport should not have the same transport object');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    const transportBefore = transceiver.receiver.transport;
+
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc1.setRemoteDescription(await pc2.createAnswer());
+    await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
+
+    const transportAfter = transceiver.receiver.transport;
+    assert_equals(transportAfter, transportBefore);
+  }, 'RTCRtpReceiver should have the same transport object after an ICE restart');
+
+</script>
diff --git a/tests/wpt/tests/webrtc/RTCRtpSender.https.html b/tests/wpt/tests/webrtc/RTCRtpSender.https.html
index d17115c46af..21058dfeedc 100644
--- a/tests/wpt/tests/webrtc/RTCRtpSender.https.html
+++ b/tests/wpt/tests/webrtc/RTCRtpSender.https.html
@@ -17,4 +17,91 @@ test((t) => {
     assert_equals(t2.sender.dtmf, null);
 }, "Video sender @dtmf is null");
 
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    assert_equals(transceiver.sender.transport, null);
+  }, 'RTCRtpSender should have a null transport initially');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_true(transceiver.sender.transport instanceof RTCDtlsTransport);
+  }, 'RTCRtpSender should have a transport after sLD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    await pc1.setLocalDescription({type: 'rollback', sdp: ''});
+    assert_equals(transceiver.sender.transport, null);
+  }, 'RTCRtpSender should have a null transport after rollback of sLD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const sender = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc2.setRemoteDescription(await pc1.createOffer());
+    const [transceiver] = pc2.getTransceivers();
+    assert_equals(transceiver.sender.transport, null);
+  }, 'RTCRtpSender should have a null transport after sRD(offer)');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_true(transceiver.sender.transport instanceof RTCDtlsTransport);
+    assert_true(transceiver.receiver.transport instanceof RTCDtlsTransport);
+    assert_equals(transceiver.sender.transport, transceiver.receiver.transport);
+  }, 'RTCRtpSender should have the same transport object as its corresponding RTCRtpReceiver');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection({bundlePolicy: 'max-bundle'});
+    t.add_cleanup(() => pc1.close());
+    const audioTransceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    const videoTransceiver = pc1.addTransceiver('video', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_equals(videoTransceiver.sender.transport, audioTransceiver.sender.transport);
+  }, 'RTCRtpSenders that share a bundle transport should have the same transport object');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection({bundlePolicy: 'max-compat'});
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+    const audioTransceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    const videoTransceiver = pc1.addTransceiver('video', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    assert_not_equals(videoTransceiver.sender.transport, audioTransceiver.sender.transport);
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc1.setRemoteDescription(await pc2.createAnswer());
+    // pc2 will accept the bundle, so these should be the same now
+    assert_equals(videoTransceiver.sender.transport, audioTransceiver.sender.transport);
+  }, 'RTCRtpSenders that do not necessarily share a bundle transport should not have the same transport object');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+
+    const transceiver = pc1.addTransceiver('audio', { direction: 'recvonly' });
+    await pc1.setLocalDescription();
+    const transportBefore = transceiver.sender.transport;
+
+    await pc2.setRemoteDescription(pc1.localDescription);
+    await pc1.setRemoteDescription(await pc2.createAnswer());
+    await pc1.setLocalDescription(await pc1.createOffer({iceRestart: true}));
+
+    const transportAfter = transceiver.sender.transport;
+    assert_equals(transportAfter, transportBefore);
+  }, 'RTCRtpSender should have the same transport object after an ICE restart');
+
 </script>
diff --git a/tests/wpt/tests/webrtc/RTCRtpTransceiver-setCodecPreferences.html b/tests/wpt/tests/webrtc/RTCRtpTransceiver-setCodecPreferences.html
index 120b28527fb..30a0fa69c52 100644
--- a/tests/wpt/tests/webrtc/RTCRtpTransceiver-setCodecPreferences.html
+++ b/tests/wpt/tests/webrtc/RTCRtpTransceiver-setCodecPreferences.html
@@ -272,4 +272,37 @@
     assert_equals(rtpParameters.codecs[0].name, firstCodec);
   }, `setCodecPreferences() modifies the order of video codecs in createOffer`);
 
+  // Tests the note removed as result of discussion in
+  // https://github.com/w3c/webrtc-pc/issues/2933
+  promise_test(async (t) => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    t.add_cleanup(() => pc2.close());
+
+    const transceiver = pc1.addTransceiver('video');
+    const {codecs} = RTCRtpReceiver.getCapabilities('video');
+    const vp8 = codecs.find(codec => codec.mimeType === 'video/VP8');
+    const h264 = codecs.find(codec => codec.mimeType === 'video/H264');
+    const thirdCodec = codecs.find(codec => ['video/VP9', 'video/AV1'].includes(codec.mimeType));
+    assert_true(!!vp8);
+    assert_true(!!h264);
+    assert_true(!!thirdCodec);
+
+    transceiver.setCodecPreferences([vp8, thirdCodec]);
+    await pc1.setLocalDescription();
+    await pc2.setRemoteDescription(pc1.localDescription);
+    const transceiver2 = pc2.getTransceivers()[0];
+    transceiver2.setCodecPreferences([h264, thirdCodec, vp8]);
+    await pc2.setLocalDescription();
+    await pc1.setRemoteDescription(pc2.localDescription);
+    const mediaSection = SDPUtils.getMediaSections(pc2.localDescription.sdp)[0];
+    const rtpParameters = SDPUtils.parseRtpParameters(mediaSection);
+    // Order is determined by pc2 but H264 is not present.
+    assert_equals(rtpParameters.codecs.length, 2);
+    assert_equals(rtpParameters.codecs[0].name, thirdCodec.mimeType.substring(6));
+    assert_equals(rtpParameters.codecs[1].name, 'VP8');
+
+  }, `setCodecPreferences() filters on receiver and prefers receiver order`);
+
  </script>
diff --git a/tests/wpt/tests/webrtc/protocol/codecs-filtered-by-direction.https.html b/tests/wpt/tests/webrtc/protocol/codecs-filtered-by-direction.https.html
new file mode 100644
index 00000000000..ed1d65e4b00
--- /dev/null
+++ b/tests/wpt/tests/webrtc/protocol/codecs-filtered-by-direction.https.html
@@ -0,0 +1,79 @@
+<!doctype html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>RTCPeerConnection Codecs in offer get filtered by direction</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../third_party/sdp/sdp.js"></script>
+<script>
+'use strict';
+
+function codecEquals(c1, c2) {
+  return c1.mimeType === c2.mimeType &&
+          c1.sdpFmtpLine === c2.sdpFmtpLine &&
+          c1.clockRate === c2.clockRate &&
+          c1.channels === c2.channels;
+}
+
+function splitCodecs() {
+  const sendCodecs = RTCRtpSender.getCapabilities('video').codecs;
+  const receiveCodecs = RTCRtpReceiver.getCapabilities('video').codecs;
+  const codecs = {
+    sendrecv: [],
+    sendonly: [],
+    recvonly: [],
+  };
+  // Ignore RTX since it is present in capabilities once and has no apt.
+  for (const receiveCodec of receiveCodecs) {
+    if (receiveCodec.mimeType === 'video/rtx') continue;
+    if (sendCodecs.find(sendCodec => codecEquals(sendCodec, receiveCodec))) {
+      codecs.sendrecv.push(receiveCodec);
+    }
+  }
+
+  for (const sendCodec of sendCodecs) {
+    if (sendCodec.mimeType === 'video/rtx') continue;
+    if (!receiveCodecs.find(receiveCodec => codecEquals(sendCodec, receiveCodec))) {
+      codecs.sendonly.push(sendCodec);
+    }
+  }
+  for (const receiveCodec of receiveCodecs) {
+    if (receiveCodec.mimeType === 'video/rtx') continue;
+    if (!sendCodecs.find(sendCodec => codecEquals(sendCodec, receiveCodec))) {
+      codecs.recvonly.push(receiveCodec);
+    }
+  }
+  return codecs;
+}
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+
+  const allCodecs = splitCodecs();
+  const transceiver = pc.addTransceiver('video');
+
+  transceiver.direction = 'sendonly'
+  const offer = await pc.createOffer();
+  const mediaSection = SDPUtils.getMediaSections(offer.sdp)[0];
+  const rtpParameters = SDPUtils.parseRtpParameters(mediaSection);
+  const sendonlyCodecs = rtpParameters.codecs.filter(c => c.name !== 'rtx');
+  assert_equals(sendonlyCodecs.length, allCodecs.sendrecv.length + allCodecs.sendonly.length);
+}, 'Codecs get filtered by direction for sendonly');
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+
+  const allCodecs = splitCodecs();
+  const transceiver = pc.addTransceiver('video');
+
+  transceiver.direction = 'recvonly'
+  const offer = await pc.createOffer();
+  const mediaSection = SDPUtils.getMediaSections(offer.sdp)[0];
+  const rtpParameters = SDPUtils.parseRtpParameters(mediaSection);
+  const recvonlyCodecs = rtpParameters.codecs.filter(c => c.name !== 'rtx');
+  assert_equals(recvonlyCodecs.length, allCodecs.sendrecv.length + allCodecs.recvonly.length);
+}, 'Codecs get filtered by direction for recvonly');
+
+</script>
diff --git a/tests/wpt/tests/webrtc/protocol/codecs-subsequent-offer.https.html b/tests/wpt/tests/webrtc/protocol/codecs-subsequent-offer.https.html
new file mode 100644
index 00000000000..fc9240e950b
--- /dev/null
+++ b/tests/wpt/tests/webrtc/protocol/codecs-subsequent-offer.https.html
@@ -0,0 +1,50 @@
+<!doctype html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>RTCPeerConnection Codecs in subsequent offer</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../third_party/sdp/sdp.js"></script>
+<script>
+'use strict';
+
+// A test for https://www.rfc-editor.org/rfc/rfc8829.html#name-subsequent-offers
+// The "m=" line and corresponding "a=rtpmap" and "a=fmtp" lines MUST only include
+// media formats that have not been excluded by the codec preferences of the
+// associated transceiver and also MUST include all currently available formats.
+
+// A VP8-only offer.
+const sdp = `v=0
+o=- 0 3 IN IP4 127.0.0.1
+s=-
+t=0 0
+a=fingerprint:sha-256 A7:24:72:CA:6E:02:55:39:BA:66:DF:6E:CC:4C:D8:B0:1A:BF:1A:56:65:7D:F4:03:AD:7E:77:43:2A:29:EC:93
+m=video 9 RTP/SAVPF 100
+c=IN IP4 0.0.0.0
+a=rtcp-mux
+a=sendrecv
+a=mid:video
+a=rtpmap:100 VP8/90000
+a=setup:actpass
+a=ice-ufrag:ETEn
+a=ice-pwd:OtSK0WpNtpUjkY4+86js7Z/l
+`;
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+
+  await pc.setRemoteDescription({type: 'offer', sdp});
+  await pc.setLocalDescription();
+  const transceiver = pc.getTransceivers()[0];
+  assert_not_equals(transceiver.stopped, true);
+  const offer = await pc.createOffer();
+  const mediaSection = SDPUtils.getMediaSections(offer.sdp)[0];
+  const rtpParameters = SDPUtils.parseRtpParameters(mediaSection);
+  const vp8 = rtpParameters.codecs.filter(codec => codec.name === 'VP8');
+  const h264 = rtpParameters.codecs.filter(codec => codec.name === 'H264');
+  assert_greater_than(vp8.length, 0);
+  assert_greater_than(h264.length, 0);
+}, 'A subsequent offer after a VP8-only negotiation includes at least all mandatory to implement codecs');
+
+</script>
diff --git a/tests/wpt/tests/webtransport/stats.https.any.js b/tests/wpt/tests/webtransport/stats.https.any.js
new file mode 100644
index 00000000000..49015e896f5
--- /dev/null
+++ b/tests/wpt/tests/webtransport/stats.https.any.js
@@ -0,0 +1,106 @@
+// META: global=window,worker
+// META: script=/common/get-host-info.sub.js
+// META: script=resources/webtransport-test-helpers.sub.js
+
+function validate_rtt_stats(stats) {
+  // The assumption below is that the RTT to localhost is under 5 seconds,
+  // which is fairly generous.
+  assert_greater_than(stats.minRtt, 0, "minRtt");
+  assert_less_than(stats.minRtt, 5 * 1000, "minRtt");
+  assert_greater_than(stats.smoothedRtt, 0, "smoothedRtt");
+  assert_less_than(stats.smoothedRtt, 5 * 1000, "smoothedRtt");
+}
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+  const stats = await wt.getStats();
+  validate_rtt_stats(stats);
+  assert_equals(stats.datagrams.expiredOutgoing, 0);
+  assert_equals(stats.datagrams.droppedIncoming, 0);
+  assert_equals(stats.datagrams.lostOutgoing, 0);
+}, "WebTransport client should be able to provide stats after connection has been established");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+  wt.close();
+
+  const stats = await wt.getStats();
+  validate_rtt_stats(stats);
+}, "WebTransport client should be able to provide stats after connection has been closed");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+  const statsPromise = wt.getStats();
+  wt.close();
+
+  const stats = await statsPromise;
+  validate_rtt_stats(stats);
+}, "WebTransport client should be able to provide stats requested right before connection has been closed");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  const stats = await wt.getStats();
+  validate_rtt_stats(stats);
+}, "WebTransport client should be able to provide valid stats when requested before connection established");
+
+promise_test(async t => {
+  const wt = new WebTransport("https://webtransport.invalid/");
+  wt.ready.catch(e => {});
+  wt.closed.catch(e => {});
+  const error = await wt.getStats().catch(e => e);
+  assert_equals(error.code, DOMException.INVALID_STATE_ERR);
+  const error2 = await wt.getStats().catch(e => e);
+  assert_equals(error2.code, DOMException.INVALID_STATE_ERR);
+}, "WebTransport client should throw an error when stats are requested for a failed connection");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+  const stats1 = wt.getStats();
+  const stats2 = wt.getStats();
+  assert_true(stats1 != stats2, "different promise returned for different getStats() calls");
+  validate_rtt_stats(await stats1);
+  validate_rtt_stats(await stats2);
+}, "WebTransport client should be able to handle multiple concurrent stats requests");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+  const stats1 = await wt.getStats();
+  validate_rtt_stats(stats1);
+  const stats2 = await wt.getStats();
+  validate_rtt_stats(stats2);
+}, "WebTransport client should be able to handle multiple sequential stats requests");
+
+promise_test(async t => {
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  const numDatagrams = 64;
+  wt.datagrams.incomingHighWaterMark = 4;
+
+  const writer = wt.datagrams.writable.getWriter();
+  const encoder = new TextEncoder();
+  const promises = [];
+  while (promises.length < numDatagrams) {
+    const token = promises.length.toString();
+    promises.push(writer.write(encoder.encode(token)));
+  }
+  await Promise.all(promises);
+
+  const maxAttempts = 40;
+  let stats;
+  for (let i = 0; i < maxAttempts; i++) {
+    wait(50);
+    stats = await wt.getStats();
+    if (stats.datagrams.droppedIncoming > 0) {
+      break;
+    }
+  }
+  assert_greater_than(stats.datagrams.droppedIncoming, 0);
+  assert_less_than_equal(stats.datagrams.droppedIncoming,
+                         numDatagrams - wt.datagrams.incomingHighWaterMark);
+}, "WebTransport client should be able to provide droppedIncoming values for datagrams");