From e01fdde3cc0f11aeed21cf357af304076046cd63 Mon Sep 17 00:00:00 2001
From: WPT Sync Bot <josh+wptsync@joshmatthews.net>
Date: Sun, 4 Jun 2023 01:56:00 +0000
Subject: [PATCH] Update web-platform-tests to revision
 b'4d1dc1971a0688048c804261711c639fe96ee187'

---
 .../inline-negative-margin-001.html.ini       |  12 -
 .../flex-aspect-ratio-img-row-005.html.ini    |   3 -
 .../overlay/overlay-user-agent-rules.html.ini |  12 +
 tests/wpt/metadata/MANIFEST.json              | 995 ++++++++++++++----
 tests/wpt/metadata/cors/basic.htm.ini         |  10 -
 .../overlay/overlay-user-agent-rules.html.ini |  12 +
 .../fetch/api/basic/keepalive.any.js.ini      |   1 -
 .../redirect/redirect-keepalive.any.js.ini    |   1 -
 .../iframe.tentative.https.window.js.ini      |   5 +-
 .../worker-blob-fetch.window.js.ini           |   3 +
 ...n-fragment-scrolling-cross-origin.html.ini |   2 +-
 .../srcdoc/consecutive-srcdoc.html.ini        |   3 +-
 .../failure-check-sequence.https.html.ini     |   9 +-
 ...eshow-events-iframe-contentWindow.html.ini |   3 -
 .../navigate-to-unparseable-url.html.ini      |   3 -
 ...tion-unload-cross-origin.sub.window.js.ini |   3 -
 ...ation-unload-same-origin-fragment.html.ini |   3 +
 ...avigation-unload-same-origin.window.js.ini |   3 +
 .../replace-before-load/a-click.html.ini      |   3 +
 .../pageload-image-in-popup.html.ini          |   3 -
 .../pushstate.html.ini                        |   3 +
 .../replacestate.html.ini                     |   3 +
 ...-blank-while-initial-load-pending.html.ini |   3 +
 ...creating_browsing_context_test_01.html.ini |   3 +
 .../2d.drawImage.animated.poster.html.ini     |   3 -
 .../drawimage_zerosize-image.html.ini         |   3 -
 .../2d.drawImage.animated.poster.html.ini     |   3 -
 ...2d.drawImage.animated.poster.worker.js.ini |   3 -
 .../2d.drawImage.svg.worker.js.ini            |   3 -
 ...d.drawImage.zerosource.image.worker.js.ini |   6 -
 .../offscreencanvas.commit.html.ini           |   7 -
 .../offscreencanvas.commit.w.html.ini         |   4 -
 .../autofocus-dialog.html.ini                 |   3 +-
 .../supported-elements.html.ini               |  12 +-
 .../rendering/dimension-attributes.html.ini   |  27 +
 .../media_fragment_seek.html.ini              |   3 -
 ...rame_sandbox_popups_nonescaping-1.html.ini |   3 +-
 ...rame_sandbox_popups_nonescaping-2.html.ini |   3 +-
 ...rame_sandbox_popups_nonescaping-3.html.ini |   1 -
 .../non-active-document.html.ini              |   6 -
 .../the-img-element/sizes/sizes-auto.html.ini | 126 +++
 .../multipart-formdata.window.js.ini          |   3 +
 ...rm-during-planned-navigation-task.html.ini |   4 +
 .../parsing/DOMContentLoaded-defer.html.ini   |   3 +
 .../module-static-import-delayed.html.ini     |   3 -
 ...ob-entry-different-function-realm.html.ini |   5 +-
 .../promise-rejection-events.html.ini         |   3 +-
 .../webmessaging/with-ports/018.html.ini      |   4 -
 .../webmessaging/without-ports/017.html.ini   |   4 -
 .../webmessaging/without-ports/018.html.ini   |   4 -
 ...-closed-websocket-connection.window.js.ini |   3 +
 ...th-open-websocket-connection.window.js.ini |   3 +
 ...s-3P-window.partitioned.tentative.html.ini |   4 -
 ...dicated-worker-from-blob-url.window.js.ini |   3 +
 .../simple_scroll_to_fragment.html.ini        |   2 -
 .../web-platform-tests/.azure-pipelines.yml   |   2 +
 .../accname/name/comp_embedded_control.html   |   2 +
 .../name/comp_hidden_not_referenced.html      |   2 +
 .../name/comp_host_language_label.html        |   2 +
 .../accname/name/comp_label.html              |   2 +
 .../accname/name/comp_labelledby.html         |   2 +
 .../accname/name/comp_name_from_content.html  |   2 +
 .../accname/name/comp_text_node.html          |   2 +
 .../accname/name/comp_tooltip.html            |   2 +
 .../accname/name/shadowdom/basic.html         |   2 +
 .../accname/name/shadowdom/slot.html          |   2 +
 .../resources/header-util.sub.js              |   2 +-
 tests/wpt/web-platform-tests/cors/basic.htm   |   6 +-
 .../style-query-with-unknown-width.html       |  26 +
 .../parsing/font-variant-invalid.html         |   5 +
 ...izing-check-grid-height-on-resize-ref.html |  38 +
 ...ck-sizing-check-grid-height-on-resize.html |  39 +
 ...ghlight-painting-underline-offset-001.html |   1 +
 .../css-target-text-decoration-001-ref.html   |  15 +
 .../css-target-text-decoration-001.html       |  26 +
 .../css-highlight-invalidation-001-ref.html   |  16 +
 .../css-highlight-invalidation-001.html       |  36 +
 .../parsing/list-style-computed.sub.html      |   8 +-
 .../animations/clip-path-composition.html     |   4 +-
 .../css-masking/clip-path/interpolation.html  |   4 +-
 .../css-masking/parsing/clip-path-valid.html  |  10 +-
 .../overlay/overlay-user-agent-rules.html     |  42 +
 .../css/css-pseudo/first-letter-digraph.html  |   5 +-
 .../reference/first-letter-digraph-ref.html   |   5 +-
 ...nts-in-scroll-event-handler.tentative.html |  53 +
 .../infinite-scroll-event.tentative.html      |  13 +-
 .../input-scrollbar-color-ref.html            |   5 +
 .../css-scrollbars/input-scrollbar-color.html |  12 +
 .../css-scrollbars/scrollbar-width-009.html   |  60 ++
 .../animation/shape-outside-composition.html  |   4 +-
 ...ic-shape-circle-ellipse-serialization.html |  12 +-
 .../css-shapes/basic-shape-interpolation.html |   4 +-
 .../parsing/shape-outside-valid.html          |  14 +-
 .../values/shape-outside-circle-000.html      |   8 +-
 .../values/shape-outside-circle-006.html      |  56 +-
 .../values/shape-outside-circle-010.html      |   2 +-
 .../values/shape-outside-ellipse-000.html     |   8 +-
 .../values/shape-outside-ellipse-006.html     |  82 +-
 .../values/shape-outside-ellipse-010.html     |   4 +-
 .../values/support/parsing-utils.js           |  69 +-
 .../offset-path-interpolation-005.html        |  26 +
 .../offset-path-interpolation-006.html        |   2 +-
 .../motion/offset-path-coord-box-001-ref.html |   5 +-
 .../css/motion/offset-path-coord-box-001.html |   2 +
 .../motion/offset-path-coord-box-002-ref.html |   5 +-
 .../css/motion/offset-path-coord-box-002.html |   2 +
 .../motion/offset-path-coord-box-003-ref.html |   5 +-
 .../css/motion/offset-path-coord-box-003.html |   2 +
 .../motion/offset-path-geometry-box-ref.html  |   2 +-
 .../css/motion/offset-path-ray-011-ref.html   |  27 +
 .../css/motion/offset-path-ray-011.html       |  29 +
 .../css/motion/offset-path-ray-012-ref.html   |  27 +
 .../css/motion/offset-path-ray-012.html       |  31 +
 .../css/motion/offset-path-ray-013-ref.html   |  29 +
 .../css/motion/offset-path-ray-013.html       |  31 +
 .../css/motion/offset-path-ray-014-ref.html   |  29 +
 .../css/motion/offset-path-ray-014.html       |  31 +
 .../offset-path-shape-circle-005-ref.html     |  27 +
 .../motion/offset-path-shape-circle-005.html  |  28 +
 .../offset-path-shape-ellipse-005-ref.html    |  27 +
 .../motion/offset-path-shape-ellipse-005.html |  28 +
 .../motion/offset-path-shape-inset-001.html   |   1 +
 .../parsing/offset-path-parsing-valid.html    |  11 +-
 .../parsing/offset-position-computed.html     |   3 +-
 .../offset-position-parsing-valid.html        |   3 +-
 .../default-enabled-features-helper.js        |  16 +-
 .../api/crashtests/body-window-destroy.html   |  11 +
 .../resources/content-lengths.json            |  16 +
 .../graphics-aria/graphics-roles.html         |   2 +
 .../web-platform-tests/html-aam/roles.html    |   5 +-
 .../html-aam/table-roles.html                 |   2 +
 .../pushstate-base.html                       |  18 +
 .../pushstate-whitespace.html                 |  20 +
 .../pushstate.html                            |  17 +
 .../replacestate-base.html                    |  18 +
 .../replacestate-whitespace.html              |  20 +
 .../replacestate.html                         |  17 +
 .../document-write.https.window.js            |  10 +
 .../document-write.https.window.js.headers    |   1 +
 .../inheritance/resources/document-write.html |  40 +
 .../resources/document-write.html.headers     |   1 +
 .../iframe-with-about-blank-iframe.html       |   7 +
 ...frame-with-about-blank-iframe.html.headers |   1 +
 .../2d.drawImage.animated.apng.html           |  31 -
 .../2d.drawImage.animated.poster.html         |  33 -
 .../drawimage_zerosize-image.html             |  33 -
 .../2d.drawImage.animated.poster.html         |  26 -
 .../2d.drawImage.animated.poster.worker.js    |  22 -
 .../2d.drawImage.svg.html                     |  15 +-
 .../2d.drawImage.svg.worker.js                |  21 -
 .../2d.drawImage.zerosource.image.html        |  22 +-
 .../2d.drawImage.zerosource.image.worker.js   |  23 -
 .../offscreencanvas.commit.html               |  42 -
 .../offscreencanvas.commit.w.html             |  79 --
 .../html/canvas/tools/PRESUBMIT.py            |   2 -
 .../html/canvas/tools/gentestutilsunion.py    | 258 +++--
 .../html/canvas/tools/templates/reftest.html  |  13 +-
 .../tools/templates/reftest_element.html      |  22 +-
 .../tools/templates/reftest_offscreen.html    |  16 +-
 .../tools/templates/reftest_worker.html       |  10 +-
 .../tools/templates/testharness_element.html  |  17 +-
 .../templates/testharness_offscreen.html      |   9 +-
 .../tools/templates/testharness_worker.js     |   6 +-
 .../drawing-images-to-the-canvas.yaml         |  55 +-
 .../html/canvas/tools/yaml-new/filters.yaml   |  12 +-
 .../html/canvas/tools/yaml-new/layers.yaml    |  68 +-
 .../resources/iframe-test.js                  |   9 +-
 .../iframe-popup-to-so.https.html             |  12 +-
 .../html/rendering/dimension-attributes.html  |  13 +-
 .../relevant-mutations-lazy.html              |  78 ++
 .../the-img-element/relevant-mutations.html   |  17 +-
 .../the-img-element/sizes/sizes-auto.html     | 147 +++
 .../sizes/support/sizes-iframed.sub.html      |   1 -
 .../support/relevant-mutations.js             |  15 +
 .../semantics/popovers/popover-focus.html     |  13 +
 .../popovers/popover-light-dismiss.html       |  27 +
 .../images/anim-poster-gr.png                 | Bin 422 -> 0 bytes
 .../interfaces/turtledove.idl                 |   1 +
 .../interfaces/webrtc-encoded-transform.idl   |   2 +-
 ...-request-disallowed-when-hidden.https.html |  46 +
 ...policy-header-host-wildcard.https.sub.html |  14 +
 ...r-host-wildcard.https.sub.html.sub.headers |   1 +
 ...policy-header-port-wildcard.https.sub.html |  14 +
 ...r-port-wildcard.https.sub.html.sub.headers |   1 +
 ...s-policy-header-scheme-only.https.sub.html |  14 +
 ...der-scheme-only.https.sub.html.sub.headers |   1 +
 ...formed-wildcard.https.sub.html.sub.headers |   2 +-
 .../animation-inactive-outside-range-ref.html |  77 ++
 ...animation-inactive-outside-range-test.html |  97 ++
 .../animation-timeline-ignored.tentative.html |  38 +-
 ...ntrinsic-iteration-duration.tentative.html |  78 ++
 .../scroll-timeline-range.html                | 185 ++++
 .../set-current-time-before-play.html         |  50 +-
 .../setting-timeline.tentative.html           |  61 +-
 .../timeline-offset-in-keyframe.html          |   5 +-
 ...tication-disallowed-when-hidden.https.html |  57 -
 .../prerender/blob_object_url.html            |  34 +
 .../prerender/fetch-blob.html                 |   2 +-
 .../prerender/restrictions.html               |   2 +-
 ...GAnimatedEnumeration-SVGMarkerElement.html |  70 +-
 .../tools/wpt/virtualenv.py                   |   2 +-
 .../wptrunner/wptrunner/browsers/chrome.py    |   3 +
 .../wptrunner/wptrunner/browsers/firefox.py   |   5 +-
 .../browsers/webkitgtk_minibrowser.py         |   2 +
 .../wptrunner/wptrunner/executors/base.py     |   9 +-
 .../tools/wptrunner/wptrunner/testrunner.py   |   9 +-
 .../url/resources/percent-encoding.json       |   8 -
 .../url/resources/urltestdata.json            |  46 +
 .../wai-aria/role/abstract-roles.html         |   3 +-
 .../wai-aria/role/fallback-roles.html         |   4 +-
 .../wai-aria/role/invalid-roles.html          |   2 +-
 .../wai-aria/role/list-roles.html             |   2 +
 .../wai-aria/role/region-roles.html           |   2 +
 .../wai-aria/role/roles.html                  |   3 +
 .../wai-aria/role/synonym-roles.html          |   2 +
 ...-setRemoteDescription-simulcast.https.html |   3 +-
 ...h-closed-webrtc-connection.https.window.js |  19 +
 ...ith-open-webrtc-connection.https.window.js |  20 +
 .../webrtc/protocol/simulcast-answer.html     |   3 +-
 .../resources/webrtc-test-helpers.sub.js      |  79 ++
 .../setParameters-encodings.https.html        |   3 +-
 .../webrtc/simulcast/simulcast.js             |  28 +-
 ...with-closed-websocket-connection.window.js |  20 +
 ...e-with-open-websocket-connection.window.js |  21 +
 .../resources/websockets-test-helpers.sub.js  |  25 +
 ...ed-webtransport-connection.https.window.js |  20 +
 ...en-webtransport-connection.https.window.js |  25 +
 .../webtransport-test-helpers.sub.js          |  21 +
 ...-authentication-basic-cors-not-enabled.htm |   5 +-
 ...entication-cors-basic-setrequestheader.htm |   5 +-
 ...tication-cors-setrequestheader-no-cred.htm |   5 +-
 .../send-network-error-sync-events.sub.htm    |   2 +-
 232 files changed, 3953 insertions(+), 1188 deletions(-)
 create mode 100644 tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-user-agent-rules.html.ini
 create mode 100644 tests/wpt/metadata/css/css-position/overlay/overlay-user-agent-rules.html.ini
 delete mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
 create mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini
 create mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
 create mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
 delete mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
 create mode 100644 tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html.ini
 create mode 100644 tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html.ini
 create mode 100644 tests/wpt/metadata/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html.ini
 create mode 100644 tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html.ini
 delete mode 100644 tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
 create mode 100644 tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html.ini
 create mode 100644 tests/wpt/metadata/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
 create mode 100644 tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
 delete mode 100644 tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
 delete mode 100644 tests/wpt/metadata/webmessaging/with-ports/018.html.ini
 delete mode 100644 tests/wpt/metadata/webmessaging/without-ports/017.html.ini
 delete mode 100644 tests/wpt/metadata/webmessaging/without-ports/018.html.ini
 create mode 100644 tests/wpt/metadata/websockets/back-forward-cache-with-closed-websocket-connection.window.js.ini
 create mode 100644 tests/wpt/metadata/websockets/back-forward-cache-with-open-websocket-connection.window.js.ini
 delete mode 100644 tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
 create mode 100644 tests/wpt/metadata/workers/dedicated-worker-from-blob-url.window.js.ini
 delete mode 100644 tests/wpt/mozilla/meta-layout-2020/mozilla/simple_scroll_to_fragment.html.ini
 create mode 100644 tests/wpt/web-platform-tests/css/css-contain/container-queries/style-query-with-unknown-width.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-position/overlay/overlay-user-agent-rules.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-scrollbars/scrollbar-width-009.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-011-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-011.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-012-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-012.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-013-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-013.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-014-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-ray-014.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005.html
 create mode 100644 tests/wpt/web-platform-tests/fetch/api/crashtests/body-window-destroy.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js.headers
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html.headers
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html
 create mode 100644 tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.apng.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations-lazy.html
 create mode 100644 tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html
 create mode 100644 tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/support/relevant-mutations.js
 delete mode 100644 tests/wpt/web-platform-tests/images/anim-poster-gr.png
 create mode 100644 tests/wpt/web-platform-tests/payment-request/payment-request-disallowed-when-hidden.https.html
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html.sub.headers
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html.sub.headers
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html
 create mode 100644 tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html.sub.headers
 create mode 100644 tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-ref.html
 create mode 100644 tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-test.html
 create mode 100644 tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/intrinsic-iteration-duration.tentative.html
 create mode 100644 tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/scroll-timeline-range.html
 delete mode 100644 tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html
 create mode 100644 tests/wpt/web-platform-tests/speculation-rules/prerender/blob_object_url.html
 create mode 100644 tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-closed-webrtc-connection.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-open-webrtc-connection.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/webrtc/resources/webrtc-test-helpers.sub.js
 create mode 100644 tests/wpt/web-platform-tests/websockets/back-forward-cache-with-closed-websocket-connection.window.js
 create mode 100644 tests/wpt/web-platform-tests/websockets/back-forward-cache-with-open-websocket-connection.window.js
 create mode 100644 tests/wpt/web-platform-tests/websockets/resources/websockets-test-helpers.sub.js
 create mode 100644 tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-closed-webtransport-connection.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-open-webtransport-connection.https.window.js

diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/linebox/inline-negative-margin-001.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/linebox/inline-negative-margin-001.html.ini
index ecd4976bf3a..afbbee3edb9 100644
--- a/tests/wpt/metadata-layout-2020/css/CSS2/linebox/inline-negative-margin-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/linebox/inline-negative-margin-001.html.ini
@@ -1,16 +1,4 @@
 [inline-negative-margin-001.html]
-  [[data-expected-height\] 3]
-    expected: FAIL
-
-  [[data-expected-height\] 4]
-    expected: FAIL
-
-  [[data-expected-height\] 5]
-    expected: FAIL
-
-  [[data-expected-height\] 6]
-    expected: FAIL
-
   [[data-expected-height\] 7]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/flex-aspect-ratio-img-row-005.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/flex-aspect-ratio-img-row-005.html.ini
index a8801ec9fe3..422b64b2c95 100644
--- a/tests/wpt/metadata-layout-2020/css/css-flexbox/flex-aspect-ratio-img-row-005.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/flex-aspect-ratio-img-row-005.html.ini
@@ -7,6 +7,3 @@
 
   [img 3]
     expected: FAIL
-
-  [img 4]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-user-agent-rules.html.ini b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-user-agent-rules.html.ini
new file mode 100644
index 00000000000..970e964ba2d
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-user-agent-rules.html.ini
@@ -0,0 +1,12 @@
+[overlay-user-agent-rules.html]
+  [HTML elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [SVG elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [Null namespace elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [Arbitrary namespace elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 5a898242a0a..8e22e1ee7e1 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -4947,6 +4947,13 @@
    "fetch": {
     "api": {
      "crashtests": {
+      "body-window-destroy.html": [
+       "646d3c5f8ce9e6591e6bd1eb2096e36d611a8899",
+       [
+        null,
+        {}
+       ]
+      ],
       "request.html": [
        "2d21930c3bbc8743ebfe5ad679e62f41a776ebde",
        [
@@ -189826,6 +189833,19 @@
         ]
        },
        "track-sizing": {
+        "masonry-track-sizing-check-grid-height-on-resize.html": [
+         "06c2901f27bf8c8edabf434cf79bf7915e5dd09e",
+         [
+          null,
+          [
+           [
+            "/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize-ref.html",
+            "=="
+           ]
+          ],
+          {}
+         ]
+        ],
         "masonry-track-sizing-explicit-block.html": [
          "05f60893900f44753d4873e60d4b348bd6270a07",
          [
@@ -191033,7 +191053,7 @@
     "css-highlight-api": {
      "painting": {
       "css-highlight-painting-underline-offset-001.html": [
-       "14b238ce1700fc9e1fe1ea3745b0a818d5c615c1",
+       "534438089ca0afd4a565e615f43cd964db3a0eb6",
        [
         null,
         [
@@ -191042,7 +191062,52 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             56
+            ],
+            [
+             0,
+             10
+            ]
+           ]
+          ]
+         ]
+        }
+       ]
+      ],
+      "css-target-text-decoration-001.html": [
+       "fa76c0bc4e7636c416ac876530f11d9a4e40050a",
+       [
+        null,
+        [
+         [
+          "/css/css-highlight-api/painting/css-target-text-decoration-001-ref.html",
+          "=="
+         ]
+        ],
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             60
+            ],
+            [
+             0,
+             32
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "custom-highlight-painting-001.html": [
@@ -191716,7 +191781,38 @@
         ],
         {}
        ]
-      ]
+      ],
+      "invalidation": {
+       "css-highlight-invalidation-001.html": [
+        "d885424765d3934eb2187d78a2f0791158441c8b",
+        [
+         null,
+         [
+          [
+           "/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001-ref.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              56
+             ],
+             [
+              0,
+              10
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
+       ]
+      }
      }
     },
     "css-images": {
@@ -218161,7 +218257,7 @@
       ]
      ],
      "first-letter-digraph.html": [
-      "b9bc10016d71a6b74803278c227787bdee6cda48",
+      "b539457cf0c5ddab61cb2c63ef45fab47057877e",
       [
        null,
        [
@@ -222702,6 +222798,19 @@
      }
     },
     "css-scrollbars": {
+     "input-scrollbar-color.html": [
+      "fa03b1391e44941bd2d37c8db1c7c518a1c181ff",
+      [
+       null,
+       [
+        [
+         "/css/css-scrollbars/input-scrollbar-color-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "scrollbar-width-paint-001.html": [
       "3621a65b39ed7d9e3b0afea4e1770427b31534de",
       [
@@ -302455,7 +302564,7 @@
       ]
      ],
      "offset-path-coord-box-001.html": [
-      "527459c6fddcc4f5d4409f311e2fb7175df35531",
+      "d8392607569d045e04aa5474df11310c93b662f8",
       [
        null,
        [
@@ -302468,7 +302577,7 @@
       ]
      ],
      "offset-path-coord-box-002.html": [
-      "0abe4169400e1f8504628b17bc11bf8cd8e62a1a",
+      "0446e2caa16c43ece32a0f3c0659c3d227f01ce9",
       [
        null,
        [
@@ -302481,7 +302590,7 @@
       ]
      ],
      "offset-path-coord-box-003.html": [
-      "6605d8e9a0d21dee7270ea99291aff45ea17f2e2",
+      "d3ea7f92a8ed17521a957aebcd631906b0ceb86b",
       [
        null,
        [
@@ -302636,6 +302745,58 @@
        {}
       ]
      ],
+     "offset-path-ray-011.html": [
+      "cf01e2b86ecdc3ea0b7033ffd6ab4fb8b236e3fe",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-ray-011-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "offset-path-ray-012.html": [
+      "7c921cfac85c6203a330dcf947b4fedbb2ad9408",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-ray-012-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "offset-path-ray-013.html": [
+      "196ff4efd6fb91265857e357cfbd0bdff689cd6c",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-ray-013-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "offset-path-ray-014.html": [
+      "42e431de3548315530abb0e4a35dc720cb57fb7c",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-ray-014-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "offset-path-ray-contain-001.html": [
       "ba03f1115f6e782f558fbe4fcca0a89aa795e5fb",
       [
@@ -302785,6 +302946,19 @@
        {}
       ]
      ],
+     "offset-path-shape-circle-005.html": [
+      "0ca93306c609fbf77da660636b23d0aebfff2c02",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-shape-circle-005-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "offset-path-shape-ellipse-001.html": [
       "b8254458d38d71038f47dd80ffddbd971190b665",
       [
@@ -302853,8 +303027,21 @@
        {}
       ]
      ],
+     "offset-path-shape-ellipse-005.html": [
+      "27eae4a5c491907c3455e5adae7c226190ee8f83",
+      [
+       null,
+       [
+        [
+         "/css/motion/offset-path-shape-ellipse-005-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "offset-path-shape-inset-001.html": [
-      "dd96c42ebb33e585a9848e12b097dfadb82d7ccf",
+      "27f5e3fc7d6a24fdfdd973cddf528d732a7b04b6",
       [
        null,
        [
@@ -321643,6 +321830,19 @@
    },
    "scroll-animations": {
     "css": {
+     "animation-inactive-outside-range-test.html": [
+      "c0021a1fbc2cf9c7b25305120a3e1d64aa4a13c4",
+      [
+       null,
+       [
+        [
+         "/scroll-animations/css/animation-inactive-outside-range-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "animation-range-visual-test.html": [
       "f675f5108aec2ef2eb27793efca6e7e6a88f3324",
       [
@@ -321906,7 +322106,7 @@
       ]
      ],
      "set-current-time-before-play.html": [
-      "cd3faeeee46cbe2b132e05f699a733621fa4005b",
+      "280346e755f0dede65035ca91731927726526b01",
       [
        null,
        [
@@ -329075,7 +329275,7 @@
   },
   "support": {
    ".azure-pipelines.yml": [
-    "efa5ee18a1dc79fdaf56abac879db39c85da5cd9",
+    "428411d04ab83f754150f2a955f82ee49ab6476b",
     []
    ],
    ".gitattributes": [
@@ -332213,7 +332413,7 @@
       []
      ],
      "header-util.sub.js": [
-      "c38e5aa59d8b2a995f907aeb91ef7e971104b7d9",
+      "bb5a63426d6c931181dd10e0cb89125b9e0ea472",
       []
      ],
      "intercept-request.js": [
@@ -389321,6 +389521,10 @@
         ]
        },
        "track-sizing": {
+        "masonry-track-sizing-check-grid-height-on-resize-ref.html": [
+         "71968864924cafa3166a352d15e4d0d1b81383d1",
+         []
+        ],
         "masonry-track-sizing-explicit-block-ref.html": [
          "993017919f39d72a8408de68b0c797e59ff3aebd",
          []
@@ -389743,6 +389947,10 @@
        "3d01bccf55dd9c20e361551bc924d5c9353c503e",
        []
       ],
+      "css-target-text-decoration-001-ref.html": [
+       "5e9ef64579800a922d225ab9ca458555fe067dcc",
+       []
+      ],
       "custom-highlight-painting-001-ref.html": [
        "b058789f6de04c017dec9a37d8955485dcd6b7e9",
        []
@@ -389827,6 +390035,12 @@
        "3a713aa8440c5877253ce9f612f2c90515f9dd60",
        []
       ],
+      "invalidation": {
+       "css-highlight-invalidation-001-ref.html": [
+        "a5ec6a59ae0be99bfcefeca724445544bd6228f8",
+        []
+       ]
+      },
       "resources": {
        "iframe-code.html": [
         "a4a1829be229acb4c0cf75cbb0e2885060741d3f",
@@ -395304,7 +395518,7 @@
        []
       ],
       "first-letter-digraph-ref.html": [
-       "7dbefc9dbdbd32ea8b05a8d3ec87f24e7d4edcc1",
+       "4eef817d7062a58066cf952c0c7f830f0fc87d37",
        []
       ],
       "first-line-with-inline-block-ref.html": [
@@ -395900,6 +396114,10 @@
       "f7c0439e202113c9611405ae967b33c2b12cfcee",
       []
      ],
+     "input-scrollbar-color-ref.html": [
+      "389cf34b716ea17620c6a1d750ac5406945bf9ba",
+      []
+     ],
      "scrollbar-width-paint-001-ref.html": [
       "42295b1fb9d7d7ef8622c729265e344117c65cc2",
       []
@@ -396590,7 +396808,7 @@
       "values": {
        "support": {
         "parsing-utils.js": [
-         "b7c637746e0ef5cf48187156a462cb1b0ba588d9",
+         "354a64b53f538b2b1e8366b30961034e4b5d7fdd",
          []
         ]
        }
@@ -410149,19 +410367,19 @@
       []
      ],
      "offset-path-coord-box-001-ref.html": [
-      "679b43fe705e67ff512b63c29a3f47b578623dbc",
+      "e9a7fbb808feefff1838dcd1476b1829231ddbba",
       []
      ],
      "offset-path-coord-box-002-ref.html": [
-      "a722ec3bd3e2e009b24a03eb6dd528be0ff13483",
+      "aad79d40d03a9643ac3b7771743acf927ea0800e",
       []
      ],
      "offset-path-coord-box-003-ref.html": [
-      "f6e6203f4a0caaa759c0dd4b2987121832d89a84",
+      "bf896aafac2a81dd209eac8519ead4f2732c3e87",
       []
      ],
      "offset-path-geometry-box-ref.html": [
-      "eb7646db6625d63ef2ee857c5e1e48ec527c9c9e",
+      "60870c815e140ac15502e723ea477678cdc848a7",
       []
      ],
      "offset-path-ray-001-ref.html": [
@@ -410188,6 +410406,22 @@
       "95b54368759342f3cf0611d256e06f9534b5562e",
       []
      ],
+     "offset-path-ray-011-ref.html": [
+      "9a477b269687e931b8bbf4bbd081e230e9b54dda",
+      []
+     ],
+     "offset-path-ray-012-ref.html": [
+      "dfb34bf784f07bcfa8cbe3c204df8af162f5ff8c",
+      []
+     ],
+     "offset-path-ray-013-ref.html": [
+      "d6bf4c037ba3853474132ede2193f1e7dc6183fd",
+      []
+     ],
+     "offset-path-ray-014-ref.html": [
+      "cd0fab44c3658956801a3fd75048f8faf521fa2d",
+      []
+     ],
      "offset-path-ray-contain-001-ref.html": [
       "05f54d9dc55dff6159df20d226eaf0753f351385",
       []
@@ -410224,6 +410458,10 @@
       "86c67dcdedcb2625216cd064384545113f2a96fc",
       []
      ],
+     "offset-path-shape-circle-005-ref.html": [
+      "77fc954ad957d4caf87d383216613fa025f143c2",
+      []
+     ],
      "offset-path-shape-ellipse-001-ref.html": [
       "32236bbc239a98c6a512d64037fcda32a8c5e976",
       []
@@ -410240,6 +410478,10 @@
       "fca4b190db514034fd7b3647cebda99d25aae0dc",
       []
      ],
+     "offset-path-shape-ellipse-005-ref.html": [
+      "98504d1a3858b778341f4cccc1b28e32461801be",
+      []
+     ],
      "offset-path-shape-inset-001-ref.html": [
       "52a9662841c5d56c7655d11329d82f65ac9d17e9",
       []
@@ -414947,7 +415189,7 @@
       []
      ],
      "default-enabled-features-helper.js": [
-      "821ebf69e367b2cd95edf2e736fc4d44008442d4",
+      "5b4c292622f0ae1f073ea7e4ab257407ca6a7e77",
       []
      ],
      "default-enabled-features-navigate.https.html": [
@@ -415972,7 +416214,7 @@
        []
       ],
       "content-lengths.json": [
-       "dac9c82dc0978439841f4981eb3ffde1056aeaac",
+       "ac6f1a24680e0e23a6e40312a11eddf358328e39",
        []
       ],
       "identical-duplicates.asis": [
@@ -419669,6 +419911,30 @@
         []
        ]
       },
+      "inheritance": {
+       "document-write.https.window.js.headers": [
+        "e007de4d7bfd8bd5a26b503f338e1da696ddb941",
+        []
+       ],
+       "resources": {
+        "document-write.html": [
+         "7a6ff3118eb268f9ca98d794477fb968a2005db7",
+         []
+        ],
+        "document-write.html.headers": [
+         "e007de4d7bfd8bd5a26b503f338e1da696ddb941",
+         []
+        ],
+        "iframe-with-about-blank-iframe.html": [
+         "b3f51252332f8d83f1371619293ba0bcd57633ae",
+         []
+        ],
+        "iframe-with-about-blank-iframe.html.headers": [
+         "e007de4d7bfd8bd5a26b503f338e1da696ddb941",
+         []
+        ]
+       }
+      },
       "origin-keyed-agent-clusters": {
        "1-iframe": {
         "parent-yes-child-no-port.sub.https.html.headers": [
@@ -422256,7 +422522,7 @@
      },
      "tools": {
       "PRESUBMIT.py": [
-       "048e96b7012b70b276922ace2d7cdd811ebb3291",
+       "c7fb93ae6fd14e0006dda63ba5279524d6bad9b8",
        []
       ],
       "gentest.py": [
@@ -422272,7 +422538,7 @@
        []
       ],
       "gentestutilsunion.py": [
-       "cf154c41894bd9c0863ccf7d3619efc74e5e3871",
+       "0542e32571a0524090ab5800dbb258cb9acc2450",
        []
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       "name2dir-canvas.yaml": [
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    "webtransport": {
+    "back-forward-cache-with-closed-webtransport-connection.https.window.js": [
+     "5cc7e93a2e14d5453e5f44630dac8745380d4c47",
+     [
+      "webtransport/back-forward-cache-with-closed-webtransport-connection.https.window.html",
+      {
+       "script_metadata": [
+        [
+         "title",
+         "Testing BFCache support for page with closed WebTransport connection."
+        ],
+        [
+         "script",
+         "/common/dispatcher/dispatcher.js"
+        ],
+        [
+         "script",
+         "/common/get-host-info.sub.js"
+        ],
+        [
+         "script",
+         "/common/utils.js"
+        ],
+        [
+         "script",
+         "/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js"
+        ],
+        [
+         "script",
+         "/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js"
+        ],
+        [
+         "script",
+         "resources/webtransport-test-helpers.sub.js"
+        ]
+       ]
+      }
+     ]
+    ],
+    "back-forward-cache-with-open-webtransport-connection.https.window.js": [
+     "5d5143ae1a47811822c55ff22148f8e70cc3029d",
+     [
+      "webtransport/back-forward-cache-with-open-webtransport-connection.https.window.html",
+      {
+       "script_metadata": [
+        [
+         "title",
+         "Testing BFCache support for page with open WebTransport connection."
+        ],
+        [
+         "script",
+         "/common/dispatcher/dispatcher.js"
+        ],
+        [
+         "script",
+         "/common/get-host-info.sub.js"
+        ],
+        [
+         "script",
+         "/common/utils.js"
+        ],
+        [
+         "script",
+         "/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js"
+        ],
+        [
+         "script",
+         "/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js"
+        ],
+        [
+         "script",
+         "resources/webtransport-test-helpers.sub.js"
+        ]
+       ]
+      }
+     ]
+    ],
     "close.https.any.js": [
      "de675036f3d7ea4a7e2aaf5bf88bdfb35a173f3a",
      [
@@ -728807,7 +729426,7 @@
      ]
     ],
     "send-authentication-basic-cors-not-enabled.htm": [
-     "2e7cbaf034048d3b73c905048b090546bee43ca1",
+     "41201960cc39ccdf58dc2892826f4c6329595b9d",
      [
       null,
       {}
@@ -728863,14 +729482,14 @@
      ]
     ],
     "send-authentication-cors-basic-setrequestheader.htm": [
-     "de9c5e543038c3527e3fb55b0e8e75728ce0f0a5",
+     "3c488dcad42485de0074ff435783f87cd4a17663",
      [
       null,
       {}
      ]
     ],
     "send-authentication-cors-setrequestheader-no-cred.htm": [
-     "14edf5bd778ef49eba175be9dd8d657a86426e9c",
+     "eed619c1efbbb5ca5605ce0d0505ae126bc28a3f",
      [
       null,
       {}
@@ -729132,7 +729751,7 @@
      ]
     ],
     "send-network-error-sync-events.sub.htm": [
-     "2266eb36e1e3791a4fa1b70ea084cc6fcead926d",
+     "8011c58bdd15ddc766fc70532a1431f98423cc60",
      [
       null,
       {}
diff --git a/tests/wpt/metadata/cors/basic.htm.ini b/tests/wpt/metadata/cors/basic.htm.ini
index f10af999034..d0f5e4ca904 100644
--- a/tests/wpt/metadata/cors/basic.htm.ini
+++ b/tests/wpt/metadata/cors/basic.htm.ini
@@ -1,13 +1,3 @@
 [basic.htm]
   [Same domain basic usage]
     expected: FAIL
-
-  [Cross domain basic usage, origin: echo]
-    expected: FAIL
-
-  [Cross domain different port, origin: echo]
-    expected: FAIL
-
-  [Cross domain different protocol, origin: echo]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/css-position/overlay/overlay-user-agent-rules.html.ini b/tests/wpt/metadata/css/css-position/overlay/overlay-user-agent-rules.html.ini
new file mode 100644
index 00000000000..970e964ba2d
--- /dev/null
+++ b/tests/wpt/metadata/css/css-position/overlay/overlay-user-agent-rules.html.ini
@@ -0,0 +1,12 @@
+[overlay-user-agent-rules.html]
+  [HTML elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [SVG elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [Null namespace elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
+
+  [Arbitrary namespace elements should have overlay:none !important from the user-agent.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
index 4c1c78640bb..e9ab91fc80e 100644
--- a/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
+++ b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
@@ -1,4 +1,3 @@
 [keepalive.any.html]
-  expected: TIMEOUT
   [keepalive in onunload in nested frame in another window]
     expected: FAIL
diff --git a/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
index f61eb5b8e17..73c79c76452 100644
--- a/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
+++ b/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
@@ -1,5 +1,4 @@
 [redirect-keepalive.any.html]
-  expected: TIMEOUT
   [[keepalive\][new window\][unload\] same-origin redirect]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/local-network-access/iframe.tentative.https.window.js.ini b/tests/wpt/metadata/fetch/local-network-access/iframe.tentative.https.window.js.ini
index a3e6497f7c9..5b0348afa74 100644
--- a/tests/wpt/metadata/fetch/local-network-access/iframe.tentative.https.window.js.ini
+++ b/tests/wpt/metadata/fetch/local-network-access/iframe.tentative.https.window.js.ini
@@ -1,5 +1,4 @@
 [iframe.tentative.https.window.html]
-  expected: TIMEOUT
   [private to local: failed preflight.]
     expected: FAIL
 
@@ -31,7 +30,7 @@
     expected: FAIL
 
   [public to local, grandparent navigates: failure.]
-    expected: TIMEOUT
+    expected: FAIL
 
   [public to local, grandparent navigates: success.]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/metadata/fetch/local-network-access/worker-blob-fetch.window.js.ini b/tests/wpt/metadata/fetch/local-network-access/worker-blob-fetch.window.js.ini
index 907ee959867..847d587e25f 100644
--- a/tests/wpt/metadata/fetch/local-network-access/worker-blob-fetch.window.js.ini
+++ b/tests/wpt/metadata/fetch/local-network-access/worker-blob-fetch.window.js.ini
@@ -34,3 +34,6 @@
 
   [treat-as-public to public: success.]
     expected: FAIL
+
+  [local https to local https: success.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
index c8a3c8f9e68..6e9f7acf151 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
@@ -1,6 +1,6 @@
 [scroll-restoration-fragment-scrolling-cross-origin.html]
   type: testharness
-  expected: ERROR
+  expected: TIMEOUT
   [Manual scroll restoration should take precedent over scrolling to fragment in cross origin navigation]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html.ini
index f2dee7b3ea9..eaebad750fe 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/srcdoc/consecutive-srcdoc.html.ini
@@ -1,6 +1,7 @@
 [consecutive-srcdoc.html]
+  expected: TIMEOUT
   [changing srcdoc does a replace navigation since the URL is still about:srcdoc]
     expected: FAIL
 
   [changing srcdoc to about:srcdoc#yo then another srcdoc does two push navigations and we can navigate back]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
index 1d68034a37d..ab9ac6e835e 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
@@ -1,12 +1,13 @@
 [failure-check-sequence.https.html]
+  expected: TIMEOUT
   [CSP check precedes COEP check - CSP header first]
-    expected: FAIL
+    expected: NOTRUN
 
   [COEP check precedes X-Frame-Options check]
-    expected: FAIL
+    expected: NOTRUN
 
   [CSP check precedes COEP check - COEP header first]
-    expected: FAIL
+    expected: NOTRUN
 
   [CSP check precedes X-Frame-Options check]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index 149bcb4ff8c..51fd557bd7f 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -7,6 +7,3 @@
 
   [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank#foo']
     expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
index 27889a98fb5..24d2f8ac554 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
@@ -1,6 +1,3 @@
 [navigate-to-unparseable-url.html]
   [location.href setter throws a SyntaxError DOMException for unparseable URLs]
     expected: FAIL
-
-  [<a> tag navigate fails for unparseable URLs]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
deleted file mode 100644
index 4ecd6d9f753..00000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[navigation-unload-cross-origin.sub.window.html]
-  [Cross-origin navigation started from unload handler must be ignored]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini
new file mode 100644
index 00000000000..49cc2e16746
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini
@@ -0,0 +1,3 @@
+[navigation-unload-same-origin-fragment.html]
+  [Tests that a fragment navigation in the unload handler will not block the initial navigation]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
new file mode 100644
index 00000000000..7dc346632a4
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
@@ -0,0 +1,3 @@
+[navigation-unload-same-origin.window.html]
+  [Same-origin navigation started from unload handler must be ignored]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
new file mode 100644
index 00000000000..60a4fa51f8a
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
@@ -0,0 +1,3 @@
+[a-click.html]
+  [aElement.click() before the load event must NOT replace]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
deleted file mode 100644
index d993e8dcc42..00000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[pageload-image-in-popup.html]
-  [The document for a standalone media file should have one child in the body.]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html.ini
new file mode 100644
index 00000000000..78b8c1bb285
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html.ini
@@ -0,0 +1,3 @@
+[pushstate.html]
+  [history.pushState() with an empty string URL]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html.ini
new file mode 100644
index 00000000000..1120dffbd9d
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html.ini
@@ -0,0 +1,3 @@
+[replacestate.html]
+  [history.replaceState() with an empty string URL]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html.ini
new file mode 100644
index 00000000000..de713daa8a0
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/the-window-object/navigate-to-about-blank-while-initial-load-pending.html.ini
@@ -0,0 +1,3 @@
+[navigate-to-about-blank-while-initial-load-pending.html]
+  [Navigating to about:blank while window.open initial load pending.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
new file mode 100644
index 00000000000..4b4820d1729
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
@@ -0,0 +1,3 @@
+[creating_browsing_context_test_01.html]
+  [first argument: absolute url]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini b/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
deleted file mode 100644
index c26cd20441d..00000000000
--- a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.drawImage.animated.poster.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html.ini b/tests/wpt/metadata/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html.ini
deleted file mode 100644
index 77ea4e129ba..00000000000
--- a/tests/wpt/metadata/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[drawimage_zerosize-image.html]
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
deleted file mode 100644
index c26cd20441d..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.drawImage.animated.poster.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
deleted file mode 100644
index 2c48d688b6a..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.drawImage.animated.poster.worker.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
deleted file mode 100644
index ee8c386c098..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.drawImage.svg.worker.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
deleted file mode 100644
index e066aa1646f..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[2d.drawImage.zerosource.image.worker.html]
-  [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
-    expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html.ini b/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html.ini
deleted file mode 100644
index ff3a587f818..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html.ini
+++ /dev/null
@@ -1,7 +0,0 @@
-[offscreencanvas.commit.html]
-  [Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.]
-    expected: FAIL
-
-  [Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement is a noop.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html.ini
deleted file mode 100644
index f654a376e62..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[offscreencanvas.commit.w.html]
-  [Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
index 830aeb8ae48..fdc27d37788 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
@@ -1,7 +1,6 @@
 [autofocus-dialog.html]
-  expected: TIMEOUT
   [<dialog> can contain autofocus, without stopping page autofocus content from working]
     expected: FAIL
 
   [<dialog>-contained autofocus element gets focused when the dialog is shown]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
index 58a99633547..d169bd2e9fa 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@@ -1,19 +1,15 @@
 [supported-elements.html]
-  expected: TIMEOUT
   [Contenteditable element should support autofocus]
     expected: FAIL
 
   [Element with tabindex should support autofocus]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: NOTRUN
+    expected: FAIL
 
   [Area element should support autofocus]
-    expected: NOTRUN
+    expected: FAIL
 
   [Host element with delegatesFocus should support autofocus]
-    expected: NOTRUN
-
-  [Non-HTMLElement should not support autofocus]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/rendering/dimension-attributes.html.ini b/tests/wpt/metadata/html/rendering/dimension-attributes.html.ini
index 31882ce5147..99de0628c87 100644
--- a/tests/wpt/metadata/html/rendering/dimension-attributes.html.ini
+++ b/tests/wpt/metadata/html/rendering/dimension-attributes.html.ini
@@ -4645,3 +4645,30 @@
 
   [<source height="0px"> mapping to <img> height property]
     expected: FAIL
+
+  [<table height="0"> mapping to <table> height property]
+    expected: FAIL
+
+  [<table height="0%"> mapping to <table> height property]
+    expected: FAIL
+
+  [<table height="0px"> mapping to <table> height property]
+    expected: FAIL
+
+  [<tr height="0"> mapping to <tr> height property]
+    expected: FAIL
+
+  [<tr height="0%"> mapping to <tr> height property]
+    expected: FAIL
+
+  [<tr height="0px"> mapping to <tr> height property]
+    expected: FAIL
+
+  [<col width="0"> mapping to <col> width property]
+    expected: FAIL
+
+  [<col width="0%"> mapping to <col> width property]
+    expected: FAIL
+
+  [<col width="0px"> mapping to <col> width property]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
deleted file mode 100644
index 09c049e4b58..00000000000
--- a/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[media_fragment_seek.html]
-  [Video should seek to time specified in media fragment syntax]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index 4041e43a4fd..6f7461b9472 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index 6bec7a732b8..76e34322dca 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,4 +1,5 @@
 [iframe_sandbox_popups_nonescaping-2.html]
   type: testharness
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index a24e565bbce..ff6467094b8 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,4 +1,3 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index 47b45e65a1c..3cdeb8ebcbc 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,9 +1,3 @@
 [non-active-document.html]
   [DOMParser]
     expected: FAIL
-
-  [createHTMLDocument]
-    expected: FAIL
-
-  [<template>]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html.ini
new file mode 100644
index 00000000000..6d5a9fe78c8
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html.ini
@@ -0,0 +1,126 @@
+[sizes-auto.html]
+  [<img loading="lazy" sizes="auto" width="10" data-ref="ref1" srcset="/images/green-1x1.png?img3 50w, /images/green-16x16.png?img3 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture3 50w, /images/green-16x16.png?picture3 51w"><img loading="lazy" width="10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="AUTO" width="10" data-ref="ref1" srcset="/images/green-1x1.png?img4 50w, /images/green-16x16.png?img4 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="AUTO" srcset="/images/green-1x1.png?picture4 50w, /images/green-16x16.png?picture4 51w"><img loading="lazy" width="10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" width="10" data-ref="ref1" srcset="/images/green-1x1.png?img5 50w, /images/green-16x16.png?img5 51w">]
+    expected: FAIL
+
+  [<picture><source srcset="/images/green-1x1.png?picture5 50w, /images/green-16x16.png?picture5 51w"><img loading="lazy" width="10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" style="width: 10px" data-ref="ref1" srcset="/images/green-1x1.png?img6 50w, /images/green-16x16.png?img6 51w">]
+    expected: FAIL
+
+  [<picture><source srcset="/images/green-1x1.png?picture6 50w, /images/green-16x16.png?picture6 51w"><img loading="lazy" style="width: 10px" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" style="width: 100%; max-width: 10px" data-ref="ref1" srcset="/images/green-1x1.png?img8 50w, /images/green-16x16.png?img8 51w">]
+    expected: FAIL
+
+  [<picture><source srcset="/images/green-1x1.png?picture8 50w, /images/green-16x16.png?picture8 51w"><img loading="lazy" style="width: 100%; max-width: 10px" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" width="10" style="visibility: hidden" data-ref="ref1" srcset="/images/green-1x1.png?img10 50w, /images/green-16x16.png?img10 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture10 50w, /images/green-16x16.png?picture10 51w"><img loading="lazy" width="10" style="visibility: hidden" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" width="10" style="display: inline" hidden="" data-ref="ref1" srcset="/images/green-1x1.png?img11 50w, /images/green-16x16.png?img11 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture11 50w, /images/green-16x16.png?picture11 51w"><img loading="lazy" width="10" style="display: inline" hidden="" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto, 100vw" width="10" data-ref="ref1" srcset="/images/green-1x1.png?img15 50w, /images/green-16x16.png?img15 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto, 100vw" srcset="/images/green-1x1.png?picture15 50w, /images/green-16x16.png?picture15 51w"><img loading="lazy" width="10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" width="100%" data-ref="ref1" srcset="/images/green-1x1.png?img18 50w, /images/green-16x16.png?img18 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture18 50w, /images/green-16x16.png?picture18 51w"><img loading="lazy" width="100%" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="height: 10px; aspect-ratio: 10 / 10" data-ref="ref1" srcset="/images/green-1x1.png?img20 50w, /images/green-16x16.png?img20 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture20 50w, /images/green-16x16.png?picture20 51w"><img loading="lazy" style="height: 10px; aspect-ratio: 10 / 10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="min-height: 10px; aspect-ratio: 10 / 10" data-ref="ref1" srcset="/images/green-1x1.png?img22 50w, /images/green-16x16.png?img22 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture22 50w, /images/green-16x16.png?picture22 51w"><img loading="lazy" style="min-height: 10px; aspect-ratio: 10 / 10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="inline-size: 10px" data-ref="ref1" srcset="/images/green-1x1.png?img24 50w, /images/green-16x16.png?img24 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture24 50w, /images/green-16x16.png?picture24 51w"><img loading="lazy" style="inline-size: 10px" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="min-inline-size: 10px" data-ref="ref1" srcset="/images/green-1x1.png?img25 50w, /images/green-16x16.png?img25 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture25 50w, /images/green-16x16.png?picture25 51w"><img loading="lazy" style="min-inline-size: 10px" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="block-size: 10px; aspect-ratio: 10 / 10" data-ref="ref1" srcset="/images/green-1x1.png?img26 50w, /images/green-16x16.png?img26 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture26 50w, /images/green-16x16.png?picture26 51w"><img loading="lazy" style="block-size: 10px; aspect-ratio: 10 / 10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="min-block-size: 10px; aspect-ratio: 10 / 10" data-ref="ref1" srcset="/images/green-1x1.png?img27 50w, /images/green-16x16.png?img27 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture27 50w, /images/green-16x16.png?picture27 51w"><img loading="lazy" style="min-block-size: 10px; aspect-ratio: 10 / 10" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="block-size: 10px; writing-mode: vertical-rl" data-ref="ref1" srcset="/images/green-1x1.png?img28 50w, /images/green-16x16.png?img28 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture28 50w, /images/green-16x16.png?picture28 51w"><img loading="lazy" style="block-size: 10px; writing-mode: vertical-rl" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="min-block-size: 10px; writing-mode: vertical-rl" data-ref="ref1" srcset="/images/green-1x1.png?img29 50w, /images/green-16x16.png?img29 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture29 50w, /images/green-16x16.png?picture29 51w"><img loading="lazy" style="min-block-size: 10px; writing-mode: vertical-rl" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl" data-ref="ref1" srcset="/images/green-1x1.png?img30 50w, /images/green-16x16.png?img30 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture30 50w, /images/green-16x16.png?picture30 51w"><img loading="lazy" style="inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="min-inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl" data-ref="ref1" srcset="/images/green-1x1.png?img31 50w, /images/green-16x16.png?img31 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture31 50w, /images/green-16x16.png?picture31 51w"><img loading="lazy" style="min-inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="--my-width: 10px; width: var(--my-width)" data-ref="ref1" srcset="/images/green-1x1.png?img32 50w, /images/green-16x16.png?img32 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture32 50w, /images/green-16x16.png?picture32 51w"><img loading="lazy" style="--my-width: 10px; width: var(--my-width)" data-ref="ref1"></picture>]
+    expected: FAIL
+
+  [<img loading="lazy" sizes="auto" style="width: calc(5px + 5px)" data-ref="ref1" srcset="/images/green-1x1.png?img33 50w, /images/green-16x16.png?img33 51w">]
+    expected: FAIL
+
+  [<picture><source sizes="auto" srcset="/images/green-1x1.png?picture33 50w, /images/green-16x16.png?picture33 51w"><img loading="lazy" style="width: calc(5px + 5px)" data-ref="ref1"></picture>]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
index 04f00279ffc..84d07e03c64 100644
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
@@ -181,3 +181,6 @@
 
   [multipart/form-data: Basic test (formdata event)]
     expected: FAIL
+
+  [multipart/form-data: 0x00 in name (normal form)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
new file mode 100644
index 00000000000..7682a4830bf
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
@@ -0,0 +1,4 @@
+[reparent-form-during-planned-navigation-task.html]
+  expected: TIMEOUT
+  [reparent-form-during-planned-navigation-task]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..b8bdf33cb65
--- /dev/null
+++ b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
@@ -0,0 +1,3 @@
+[DOMContentLoaded-defer.html]
+  [The end: DOMContentLoaded and defer scripts]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
deleted file mode 100644
index 53acb938c1b..00000000000
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[module-static-import-delayed.html]
-  [document.write in an imported module]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
index dbe1def99e3..7237f5792de 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
@@ -1,9 +1,10 @@
 [promise-job-entry-different-function-realm.html]
+  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Thenable resolution]
     expected: FAIL
@@ -12,4 +13,4 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
index 4a48dd15a9d..1d71471b73c 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
@@ -1,6 +1,7 @@
 [promise-rejection-events.html]
+  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: FAIL
+    expected: TIMEOUT
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
deleted file mode 100644
index b7b36c1d3a4..00000000000
--- a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
deleted file mode 100644
index b7b36c1d3a4..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/websockets/back-forward-cache-with-closed-websocket-connection.window.js.ini b/tests/wpt/metadata/websockets/back-forward-cache-with-closed-websocket-connection.window.js.ini
new file mode 100644
index 00000000000..55462bf5691
--- /dev/null
+++ b/tests/wpt/metadata/websockets/back-forward-cache-with-closed-websocket-connection.window.js.ini
@@ -0,0 +1,3 @@
+[back-forward-cache-with-closed-websocket-connection.window.html]
+  [Testing BFCache support for page with closed WebSocket connection.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/websockets/back-forward-cache-with-open-websocket-connection.window.js.ini b/tests/wpt/metadata/websockets/back-forward-cache-with-open-websocket-connection.window.js.ini
new file mode 100644
index 00000000000..7b4e24160b9
--- /dev/null
+++ b/tests/wpt/metadata/websockets/back-forward-cache-with-open-websocket-connection.window.js.ini
@@ -0,0 +1,3 @@
+[back-forward-cache-with-open-websocket-connection.window.html]
+  [Testing BFCache support for page with open WebSocket connection.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini b/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
deleted file mode 100644
index aa6c9e5b826..00000000000
--- a/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html]
-  expected: TIMEOUT
-  [StorageKey: test 3P about:blank window opened from a 3P iframe]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/workers/dedicated-worker-from-blob-url.window.js.ini b/tests/wpt/metadata/workers/dedicated-worker-from-blob-url.window.js.ini
new file mode 100644
index 00000000000..d0154d3e5d7
--- /dev/null
+++ b/tests/wpt/metadata/workers/dedicated-worker-from-blob-url.window.js.ini
@@ -0,0 +1,3 @@
+[dedicated-worker-from-blob-url.window.html]
+  [Creating a dedicated worker from a blob URL works immediately before revoking.]
+    expected: FAIL
diff --git a/tests/wpt/mozilla/meta-layout-2020/mozilla/simple_scroll_to_fragment.html.ini b/tests/wpt/mozilla/meta-layout-2020/mozilla/simple_scroll_to_fragment.html.ini
deleted file mode 100644
index 1fb12157a34..00000000000
--- a/tests/wpt/mozilla/meta-layout-2020/mozilla/simple_scroll_to_fragment.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[simple_scroll_to_fragment.html]
-  expected: FAIL
diff --git a/tests/wpt/web-platform-tests/.azure-pipelines.yml b/tests/wpt/web-platform-tests/.azure-pipelines.yml
index efa5ee18a1d..428411d04ab 100644
--- a/tests/wpt/web-platform-tests/.azure-pipelines.yml
+++ b/tests/wpt/web-platform-tests/.azure-pipelines.yml
@@ -500,6 +500,7 @@ jobs:
       export SYSTEM_VERSION_COMPAT=0
       ./wpt run --no-manifest-update --no-restart-on-unexpected --no-fail-on-unexpected --this-chunk=$(System.JobPositionInPhase) --total-chunks=$(System.TotalJobsInPhase) --chunk-type hash --log-wptreport $(Build.ArtifactStagingDirectory)/wpt_report_$(System.JobPositionInPhase).json --log-wptscreenshot $(Build.ArtifactStagingDirectory)/wpt_screenshot_$(System.JobPositionInPhase).txt --log-mach - --log-mach-level info --channel stable --kill-safari safari
     displayName: 'Run tests'
+    retryCountOnTaskFailure: 2
   - task: PublishBuildArtifacts@1
     displayName: 'Publish results'
     inputs:
@@ -540,6 +541,7 @@ jobs:
       export SYSTEM_VERSION_COMPAT=0
       ./wpt run --no-manifest-update --no-restart-on-unexpected --no-fail-on-unexpected --this-chunk=$(System.JobPositionInPhase) --total-chunks=$(System.TotalJobsInPhase) --chunk-type hash --log-wptreport $(Build.ArtifactStagingDirectory)/wpt_report_$(System.JobPositionInPhase).json --log-wptscreenshot $(Build.ArtifactStagingDirectory)/wpt_screenshot_$(System.JobPositionInPhase).txt --log-mach - --log-mach-level info --channel preview --kill-safari safari
     displayName: 'Run tests'
+    retryCountOnTaskFailure: 2
   - task: PublishBuildArtifacts@1
     displayName: 'Publish results'
     inputs:
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_embedded_control.html b/tests/wpt/web-platform-tests/accname/name/comp_embedded_control.html
index cfcd4d21c7b..09856ef662e 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_embedded_control.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_embedded_control.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_embedded_control">#comp_embedded_control</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <label>
   <input type="checkbox" data-expectedlabel="Flash the screen 3 times" data-testname="checkbox label with embedded textfield" class="ex">
   Flash the screen
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_hidden_not_referenced.html b/tests/wpt/web-platform-tests/accname/name/comp_hidden_not_referenced.html
index cfaebbb502d..84a2a2ca802 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_hidden_not_referenced.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_hidden_not_referenced.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_hidden_not_referenced">#comp_hidden_not_referenced</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <h2 class="ex" data-expectedlabel="heading label" data-testname="heading with interior hidden node">
   heading
   <span hidden>bogus</span>
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_host_language_label.html b/tests/wpt/web-platform-tests/accname/name/comp_host_language_label.html
index d2638b1ba75..221ff0e9fb1 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_host_language_label.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_host_language_label.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_host_language_label">#comp_host_language_label</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <label for="t">label</label>
 <input id="t" data-expectedlabel="label" data-testname="host language: label[for] input[type=text]" class="ex">
 <!-- Todo: test all remaining input types with label[for] -->
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_label.html b/tests/wpt/web-platform-tests/accname/name/comp_label.html
index 9edd8000e94..0c057862b3b 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_label.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_label.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_label">#comp_label</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <div aria-label="label" data-expectedlabel="label" data-testname="label valid on group" role="group" class="ex">x</div>
 
 <!-- Todo: test all remaining cases of https://w3c.github.io/accname/#comp_label -->
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_labelledby.html b/tests/wpt/web-platform-tests/accname/name/comp_labelledby.html
index 8e66362d813..ab17bff1187 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_labelledby.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_labelledby.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_labelledby">#comp_labelledby</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <div role="group" aria-labelledby="h" class="ex" data-expectedlabel="div group label" data-testname="div group explicitly labelledby heading">
   <h2 id="h">div group label</h2>
   <p>text inside div group</p>
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_name_from_content.html b/tests/wpt/web-platform-tests/accname/name/comp_name_from_content.html
index 1390c6dcc80..0b40206a7eb 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_name_from_content.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_name_from_content.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_name_from_content">#comp_name_from_content</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <h1 data-expectedlabel="label" data-testname="heading name from content" class="ex">label</h1>
 
 <!--
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_text_node.html b/tests/wpt/web-platform-tests/accname/name/comp_text_node.html
index 61f51cf4edc..d63bdda82c0 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_text_node.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_text_node.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the <a href="https://w3c.github.io/accname/#comp_text_node">#comp_text_node</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <!-- I'm not certain whether #comp_text_node requires a lot of testing outside of the #comp_name_from_content contexts, -->
 <!-- but I did think of one example where text node versus comment node may make a difference when joining text nodes with a space vs innerText. -->
 
diff --git a/tests/wpt/web-platform-tests/accname/name/comp_tooltip.html b/tests/wpt/web-platform-tests/accname/name/comp_tooltip.html
index 52e7b43cfc5..34718bd025f 100644
--- a/tests/wpt/web-platform-tests/accname/name/comp_tooltip.html
+++ b/tests/wpt/web-platform-tests/accname/name/comp_tooltip.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+  <p>Tests the <a href="https://w3c.github.io/accname/#comp_tooltip">#comp_tooltip</a> portions of the AccName <em>Name Computation</em> algorithm.</p>
+
 <a href="#" title="label" data-expectedlabel="label" data-testname="link label from tooltip" class="ex"><img src="#" alt=""></a>
 
 <!-- Todo: test all remaining cases of https://w3c.github.io/accname/#comp_tooltip -->
diff --git a/tests/wpt/web-platform-tests/accname/name/shadowdom/basic.html b/tests/wpt/web-platform-tests/accname/name/shadowdom/basic.html
index ca60986d337..9746f2db47a 100644
--- a/tests/wpt/web-platform-tests/accname/name/shadowdom/basic.html
+++ b/tests/wpt/web-platform-tests/accname/name/shadowdom/basic.html
@@ -6,6 +6,8 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="/wai-aria/scripts/aria-utils.js"></script>
 
+ <p>Tests the basic shadow DOM portions of the AccName <em>Name Computation</em> algorithm, coming in <a href="https://github.com/w3c/accname/pull/167">ARIA #167</a>.</p>
+
 <label id="label1">
   <div id="host1"></div>
 </label>
diff --git a/tests/wpt/web-platform-tests/accname/name/shadowdom/slot.html b/tests/wpt/web-platform-tests/accname/name/shadowdom/slot.html
index 9155a2eef3b..41ccd5a57f4 100644
--- a/tests/wpt/web-platform-tests/accname/name/shadowdom/slot.html
+++ b/tests/wpt/web-platform-tests/accname/name/shadowdom/slot.html
@@ -6,6 +6,8 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="/wai-aria/scripts/aria-utils.js"></script>
 
+ <p>Tests the shadow DOM slots portions of the AccName <em>Name Computation</em> algorithm, coming in <a href="https://github.com/w3c/accname/pull/167">ARIA #167</a>.</p>
+
 <label id="label1">
   <div id="host1">slotted</div>
 </label>
diff --git a/tests/wpt/web-platform-tests/browsing-topics/resources/header-util.sub.js b/tests/wpt/web-platform-tests/browsing-topics/resources/header-util.sub.js
index c38e5aa59d8..bb5a63426d6 100644
--- a/tests/wpt/web-platform-tests/browsing-topics/resources/header-util.sub.js
+++ b/tests/wpt/web-platform-tests/browsing-topics/resources/header-util.sub.js
@@ -1,4 +1,4 @@
-const EMPTY_TOPICS_HEADER = 't=(), p=P000000000000000000000000000';
+const EMPTY_TOPICS_HEADER = '();p=P0000000000000000000000000000000';
 
 function test_topics_iframe_navigation_header(
     test, has_browsing_topics_attribute, is_same_origin, expect_topics_header_available_func) {
diff --git a/tests/wpt/web-platform-tests/cors/basic.htm b/tests/wpt/web-platform-tests/cors/basic.htm
index 85d443190db..cbdb4ca9aa7 100644
--- a/tests/wpt/web-platform-tests/cors/basic.htm
+++ b/tests/wpt/web-platform-tests/cors/basic.htm
@@ -43,12 +43,12 @@ function cors(desc, scheme, subdomain = "", port = location.port) {
 }
 
 cors("Same domain basic usage");
-cors("Cross domain basic usage", "http", "www1");
+cors("Cross domain basic usage", "http", "www1.");
 cors("Same domain different port", "http", undefined, PORT);
 
-cors("Cross domain different port", "http", "www1", PORT);
+cors("Cross domain different port", "http", "www1.", PORT);
 
-cors("Cross domain different protocol", "https", "www1", PORTS);
+cors("Cross domain different protocol", "https", "www1.", PORTS);
 
 cors("Same domain different protocol different port", "https", undefined, PORTS);
 
diff --git a/tests/wpt/web-platform-tests/css/css-contain/container-queries/style-query-with-unknown-width.html b/tests/wpt/web-platform-tests/css/css-contain/container-queries/style-query-with-unknown-width.html
new file mode 100644
index 00000000000..8b05d6c1120
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/container-queries/style-query-with-unknown-width.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<title>CSS Container Queries Test: style and size query against container without a principal box</title>
+<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/cq-testcommon.js"></script>
+<style>
+  #container {
+    container-type: inline-size;
+    display: contents;
+    --foo: bar;
+  }
+  @container (width >= 0px) or style(--foo: bar) {
+    #target { color: green; }
+  }
+</style>
+<div id="container">
+  <div id="target">Should be green</div>
+</div>
+<script>
+  setup(() => assert_implements_container_queries());
+
+  test(() => {
+    assert_equals(getComputedStyle(target).color, "rgb(0, 128, 0)");
+  }, "width query should evaluate to unknown and style query to true");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/parsing/font-variant-invalid.html b/tests/wpt/web-platform-tests/css/css-fonts/parsing/font-variant-invalid.html
index c591acc3fcd..93c7d6bb56e 100644
--- a/tests/wpt/web-platform-tests/css/css-fonts/parsing/font-variant-invalid.html
+++ b/tests/wpt/web-platform-tests/css/css-fonts/parsing/font-variant-invalid.html
@@ -12,6 +12,11 @@
 <body>
 <script>
 test_invalid_value('font-variant', 'normal none');
+test_invalid_value('font-variant', 'none normal');
+test_invalid_value('font-variant', 'small-caps normal');
+test_invalid_value('font-variant', 'normal small-caps');
+test_invalid_value('font-variant', 'small-caps none');
+test_invalid_value('font-variant', 'none small-caps');
 
 // <common-lig-values>
 test_invalid_value('font-variant', 'common-ligatures no-common-ligatures');
diff --git a/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize-ref.html b/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize-ref.html
new file mode 100644
index 00000000000..71968864924
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize-ref.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+<meta charset="utf-8">
+<link rel="author" title="Brandon Stewart" href="mailto:brandonstewart@apple.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-3">
+<meta name="assert" content="When the height of an element in the grid changes, ensure the grid is properly resized">
+</head>
+
+<style>
+  grid {
+    display: grid;
+    grid-template-rows: masonry;
+    grid-template-columns: auto;
+    grid-gap: 10px;
+    border: 10px;
+    border-style: solid;
+  }
+  item1 {
+    background-color: grey;
+    height: 125px;
+    width: 250px;
+  }
+  item2 {
+    background-color: grey;
+    height: 250px;
+    width: 250px;
+  }
+</style>
+</head>
+<body>
+  <grid>
+    <item1>1</item1>
+    <item2>2</item2>
+  </grid>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize.html b/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize.html
new file mode 100644
index 00000000000..06c2901f27b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/masonry/tentative/track-sizing/masonry-track-sizing-check-grid-height-on-resize.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+<meta charset="utf-8">
+<link rel="author" title="Brandon Stewart" href="mailto:brandonstewart@apple.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid-3">
+<link rel="match" href="masonry-track-sizing-check-grid-height-on-resize-ref.html">
+<meta name="assert" content="When the height of an element in the grid changes, ensure the grid is properly resized">
+</head>
+
+<style>
+  grid {
+    display: grid;
+    grid-template-rows: masonry;
+    grid-template-columns: auto;
+    grid-gap: 10px;
+    border: 10px;
+    border-style: solid;
+  }
+  item {
+    background-color: grey;
+    height: 250px;
+    width: 250px;
+  }
+</style>
+</head>
+<body>
+  <grid>
+    <item>1</item>
+    <item>2</item>
+  </grid>
+</body>
+<script>
+    /* Force a relayout */
+    document.body.offsetHeight;
+    document.querySelector("item").style["height"] = "125px";
+</script>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-highlight-painting-underline-offset-001.html b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-highlight-painting-underline-offset-001.html
index 14b238ce170..534438089ca 100644
--- a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-highlight-painting-underline-offset-001.html
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-highlight-painting-underline-offset-001.html
@@ -5,6 +5,7 @@
 <link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
 <link rel="match" href="css-highlight-painting-underline-offset-001-ref.html">
 <meta name="assert" content="Verify that text-underline-offset works in a ::highlight pseudo-element.">
+<meta name="fuzzy" content="0-56;0-10">
 <style>
   ::highlight(example) {
     text-decoration: wavy underline green 5px;
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001-ref.html b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001-ref.html
new file mode 100644
index 00000000000..5e9ef645798
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Highlight API Test: ::target-text text-decoration - reference</title>
+<style>
+  #target-text {
+    text-decoration: wavy underline overline green 5px;
+    text-underline-offset: 20px;
+  }
+  div {
+    border: solid 1px black;
+    padding: 50px;
+  }
+</style>
+<div id="upper">The word <span id="target-text">remain</span> has under/over lines.</div>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001.html b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001.html
new file mode 100644
index 00000000000..fa76c0bc4e7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/css-target-text-decoration-001.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>CSS Highlight API Test: ::target-text text-decoration</title>
+<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
+<link rel="match" href="css-target-text-decoration-001-ref.html">
+<meta name="assert" content="This test checks that text-decorations of target text are fully rendered.">
+<meta name="fuzzy" content="0-60;0-32">
+<script src="/common/reftest-wait.js"></script>
+<style>
+  ::target-text {
+    text-decoration: wavy underline overline green 5px;
+    text-underline-offset: 20px;
+    background-color: transparent;
+  }
+  div {
+    border: solid 1px black;
+    padding: 50px;
+  }
+</style>
+<div id="upper">The word remain has under/over lines.</div>
+<script>
+  window.location.href = `css-target-text-decoration-001.html#:~:text=remain`;
+  requestAnimationFrame(() => takeScreenshot());
+</script>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001-ref.html b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001-ref.html
new file mode 100644
index 00000000000..a5ec6a59ae0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001-ref.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Highlight API Test: ::highlight dynamic remove text decoration - reference</title>
+<style>
+  #upper {
+    text-decoration: wavy underline overline green 5px;
+    text-underline-offset: 20px;
+  }
+  div {
+    border: solid 1px black;
+    padding: 50px;
+  }
+</style>
+<div id="upper">This line starts with under/over lines that remain.</div>
+<div id="lower">This line starts with under/over lines that are removed.</div>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001.html b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001.html
new file mode 100644
index 00000000000..d885424765d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/painting/invalidation/css-highlight-invalidation-001.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<meta charset="utf-8">
+<title>CSS Highlight API Test: ::highlight dynamic change text-decoration</title>
+<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
+<link rel="match" href="css-highlight-invalidation-001-ref.html">
+<meta name="assert" content="This test checks that it's possible to modify dynamically the text-decoration of a custom highlight through ::highlight pseudo-element.">
+<meta name="fuzzy" content="0-56;0-10">
+<script src="/common/reftest-wait.js"></script>
+<style>
+  ::highlight(example) {
+    text-decoration: wavy underline overline green 5px;
+    text-underline-offset: 20px;
+  }
+  div {
+    border: solid 1px black;
+    padding: 50px;
+  }
+</style>
+<div id="upper">This line starts with under/over lines that remain.</div>
+<div id="lower">This line starts with under/over lines that are removed.</div>
+<script>
+  let range_upper = new Range();
+  range_upper.setStart(upper, 0);
+  range_upper.setEnd(upper, 1);
+  let range_lower = new Range();
+  range_lower.setStart(lower, 0);
+  range_lower.setEnd(lower, 1);
+  CSS.highlights.set(`example`, new Highlight(range_lower));
+
+  requestAnimationFrame(() => requestAnimationFrame(() => {
+    CSS.highlights.set(`example`, new Highlight(range_upper));
+    requestAnimationFrame(() => takeScreenshot());
+  }));
+</script>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-lists/parsing/list-style-computed.sub.html b/tests/wpt/web-platform-tests/css/css-lists/parsing/list-style-computed.sub.html
index 611fae5bf93..f86915831e0 100644
--- a/tests/wpt/web-platform-tests/css/css-lists/parsing/list-style-computed.sub.html
+++ b/tests/wpt/web-platform-tests/css/css-lists/parsing/list-style-computed.sub.html
@@ -12,11 +12,11 @@
 <body>
 <div id="target"></div>
 <script>
-test_computed_value('list-style', 'none', 'outside none none');
+test_computed_value('list-style', 'outside none none', 'none');
 
-test_computed_value('list-style', 'inside', 'inside none disc');
-test_computed_value('list-style', 'url("https://{{host}}/")', 'outside url("https://{{host}}/") disc');
-test_computed_value('list-style', 'square', 'outside none square');
+test_computed_value('list-style', 'inside none disc', 'inside');
+test_computed_value('list-style', 'outside url("https://{{host}}/") disc', 'url("https://{{host}}/")');
+test_computed_value('list-style', 'outside none square', 'square');
 
 test_computed_value('list-style', 'inside url("https://{{host}}/") square');
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-masking/animations/clip-path-composition.html b/tests/wpt/web-platform-tests/css/css-masking/animations/clip-path-composition.html
index 2275ae70a33..42c5988e045 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/animations/clip-path-composition.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/animations/clip-path-composition.html
@@ -92,8 +92,8 @@ test_composition({
   addFrom: 'ellipse()',
   addTo: 'ellipse(closest-side farthest-side)',
 }, [
-  {at: 0.25, expect: 'ellipse(at 50% 50%)'},
-  {at: 0.75, expect: 'ellipse(closest-side farthest-side at 50% 50%)'},
+  {at: 0.25, expect: 'ellipse()'},
+  {at: 0.75, expect: 'ellipse(closest-side farthest-side)'},
 ]);
 
 test_composition({
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/interpolation.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/interpolation.html
index da3981feed6..f580de9c769 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/interpolation.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/interpolation.html
@@ -28,7 +28,7 @@ test(function(t) {
   getComputedStyle(div).clipPath;
 
   div.style.clipPath = 'circle(26px)';
-  assert_equals(getComputedStyle(div).clipPath, 'circle(0px at 50% 50%)',
+  assert_equals(getComputedStyle(div).clipPath, 'circle(0px)',
                 'The radius of circle is clamped to zero at 61%');
 }, 'Test circle with negative easing on clip-path');
 
@@ -40,7 +40,7 @@ test(function(t) {
   getComputedStyle(div).clipPath;
 
   div.style.clipPath = 'ellipse(26px 26px)';
-  assert_equals(getComputedStyle(div).clipPath, 'ellipse(0px 0px at 50% 50%)',
+  assert_equals(getComputedStyle(div).clipPath, 'ellipse(0px 0px)',
                 'The radius of ellipse is clamped to zero at 61%');
 }, 'Test ellipse with negative easing on clip-path');
 
diff --git a/tests/wpt/web-platform-tests/css/css-masking/parsing/clip-path-valid.html b/tests/wpt/web-platform-tests/css/css-masking/parsing/clip-path-valid.html
index 895cdfacac6..fd268b42916 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/parsing/clip-path-valid.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/parsing/clip-path-valid.html
@@ -25,15 +25,15 @@ test_valid_value("clip-path", "inset(0px round 0px 1px 2%)");
 test_valid_value("clip-path", "inset(0px round 0px 1px 2% 3em)");
 test_valid_value("clip-path", "inset(10px round 20% / 0px 1px 2% 3em)");
 
-test_valid_value("clip-path", "circle()", "circle(at 50% 50%)");
-test_valid_value("clip-path", "circle(1px)", "circle(1px at 50% 50%)");
-test_valid_value("clip-path", "circle(closest-side)", "circle(at 50% 50%)");
+test_valid_value("clip-path", "circle()");
+test_valid_value("clip-path", "circle(1px)", "circle(1px)");
+test_valid_value("clip-path", "circle(closest-side)", "circle()");
 test_valid_value("clip-path", "circle(at 10% 20%)");
 test_valid_value("clip-path", "circle(farthest-side at center top)", "circle(farthest-side at 50% 0%)");
 test_valid_value("clip-path", "circle(4% at top right)", "circle(4% at 100% 0%)");
 
-test_valid_value("clip-path", "ellipse()", "ellipse(at 50% 50%)");
-test_valid_value("clip-path", "ellipse(1px closest-side)", "ellipse(1px closest-side at 50% 50%)");
+test_valid_value("clip-path", "ellipse()");
+test_valid_value("clip-path", "ellipse(1px closest-side)");
 test_valid_value("clip-path", "ellipse(at 10% 20%)");
 test_valid_value("clip-path", "ellipse(closest-side closest-side at 10% 20%)", "ellipse(at 10% 20%)");
 test_valid_value("clip-path", "ellipse(farthest-side 4% at bottom left)", "ellipse(farthest-side 4% at 0% 100%)");
diff --git a/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-user-agent-rules.html b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-user-agent-rules.html
new file mode 100644
index 00000000000..427eb8f7e40
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-user-agent-rules.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel=help href="https://github.com/whatwg/html/pull/9093">
+<link rel=help href="https://drafts.csswg.org/css-position-4/#overlay">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<title>CSS Position Test: User agent style for overlay</title>
+
+<style>
+div {
+  overlay: auto;
+}
+</style>
+
+<body>
+<script>
+test(() => {
+  const div = document.createElement('div');
+  document.body.appendChild(div);
+  div.style.overlay = 'auto';
+  assert_equals(getComputedStyle(div).overlay, 'none');
+}, 'HTML elements should have overlay:none !important from the user-agent.');
+
+test(() => {
+  const svg = document.createElement('svg');
+  document.body.appendChild(svg);
+  svg.style.overlay = 'auto';
+  assert_equals(getComputedStyle(svg).overlay, 'none');
+}, 'SVG elements should have overlay:none !important from the user-agent.');
+
+test(() => {
+  const nullNamespace = document.createElementNS(null, 'div');
+  document.body.appendChild(nullNamespace);
+  assert_equals(getComputedStyle(nullNamespace).overlay, 'none');
+}, 'Null namespace elements should have overlay:none !important from the user-agent.');
+
+test(() => {
+  const weirdNamespace = document.createElementNS('hello world', 'div');
+  document.body.appendChild(weirdNamespace);
+  assert_equals(getComputedStyle(weirdNamespace).overlay, 'none');
+}, 'Arbitrary namespace elements should have overlay:none !important from the user-agent.');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/first-letter-digraph.html b/tests/wpt/web-platform-tests/css/css-pseudo/first-letter-digraph.html
index b9bc10016d7..b539457cf0c 100644
--- a/tests/wpt/web-platform-tests/css/css-pseudo/first-letter-digraph.html
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/first-letter-digraph.html
@@ -26,7 +26,6 @@
     <p>IJsselmeer</p>
     <p>ijsselmeer</p>
     <p>“IJsselmeer”</p>
-    <p>Ijsselmeer</p> <!-- mixed case within the digraph is unlikely in practice -->
   </div>
   <div lang="en">
     <p lang="nl-NL">IJsselmeer</p> <!-- lang tag with country code should also work -->
@@ -37,7 +36,9 @@
     <p>IJsselmeer</p>
     <p>ijsselmeer</p>
     <p>“IJsselmeer”</p>
-    <p>Ijsselmeer</p>
+  </div>
+  <div lang="nl">
+    <p>Ijotalen</p> <!-- mixed case not treated as digraph -->
   </div>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/reference/first-letter-digraph-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/reference/first-letter-digraph-ref.html
index 7dbefc9dbdb..4eef817d706 100644
--- a/tests/wpt/web-platform-tests/css/css-pseudo/reference/first-letter-digraph-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/reference/first-letter-digraph-ref.html
@@ -23,7 +23,6 @@
     <p><span>IJ</span>sselmeer</p>
     <p><span>ij</span>sselmeer</p>
     <p><span>“IJ</span>sselmeer”</p>
-    <p><span>Ij</span>sselmeer</p>
   </div>
   <div lang="en">
     <p lang="nl-NL"><span>IJ</span>sselmeer</p>
@@ -34,7 +33,9 @@
     <p><span>I</span>Jsselmeer</p>
     <p><span>i</span>jsselmeer</p>
     <p><span>“I</span>Jsselmeer”</p>
-    <p><span>I</span>jsselmeer</p>
+  </div>
+  <div lang="nl">
+    <p><span>I</span>jotalen</p> <!-- mixed case not treated as digraph -->
   </div>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html
new file mode 100644
index 00000000000..84fd79cbcb9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/adjustments-in-scroll-event-handler.tentative.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<meta name="viewport" content="width=device-width">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/">
+<style>
+  body { margin: 0 }
+  .content {
+    height: 200px;
+    background: lightblue;
+  }
+  .spacer {
+    height: 300vh;
+  }
+</style>
+<div class="content"></div>
+<div class="content" style="background: green"></div>
+<div class="spacer"></div>
+<script>
+const anchor = document.querySelectorAll(".content")[1];
+
+const t = async_test("Scroll adjustments happen even if it's triggered from scroll event listeners");
+window.addEventListener("scroll", t.step_func(function() {
+  // Forcibly flush layout, this will flush the pending the node insertion.
+  let scrollPosition = window.scrollY;
+
+  requestAnimationFrame(t.step_func(function() {
+    requestAnimationFrame(t.step_func(function() {
+      assert_equals(window.scrollY, 400);
+      t.done();
+    }));
+  }));
+}), { once: true });
+
+window.onload = t.step_func(function() {
+  requestAnimationFrame(t.step_func(function() {
+    // Scroll to the anchor node in a requestAnimationFrame callback so that
+    // it queues a scroll event which will be fired in the next event loop.
+    anchor.scrollIntoView({ behavior: "instant" });
+
+    // Then in a setTimeout callback insert an element just right before the
+    // anchor node, it will run before firing the scroll event.
+    t.step_timeout(function() {
+      const content = document.createElement("div");
+      content.classList.add("content");
+      content.style.background = "red";
+      anchor.before(content);
+    }, 0);
+  }));
+});
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html
index 4bc222f4e72..e2a2998c52b 100644
--- a/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html
@@ -18,20 +18,23 @@
 <div class="content"></div>
 <div class="content"></div>
 <script>
-let first = true;
-const t = async_test("Scroll adjustments don't happen if triggered from scroll event listeners");
+let count = 0;
+const t = async_test("Scroll adjustments don't keep happening with 0-length adjustments triggered by a single scroll operation");
 onscroll = t.step_func(function() {
-  assert_true(first, "Should only get one event");
-  first = false;
+  ++count;
   hidden.style.display = "block";
   hidden.offsetTop;
   hidden.style.display = "none";
+  let currentCount = count;
   requestAnimationFrame(t.step_func(function() {
     requestAnimationFrame(t.step_func(function() {
-      t.done();
+      if (currentCount == count) {
+        t.done();
+      }
     }));
   }));
 });
+
 window.onload = t.step_func(function() {
   window.scrollTo(0, document.documentElement.scrollHeight);
   window.scrollBy(0, -200);
diff --git a/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color-ref.html b/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color-ref.html
new file mode 100644
index 00000000000..389cf34b716
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color-ref.html
@@ -0,0 +1,5 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>CSS Reference</title>
+<link rel="author" title="Luke Warlow" href="mailto:luke@warlow.dev">
+<input>
diff --git a/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color.html b/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color.html
new file mode 100644
index 00000000000..fa03b1391e4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scrollbars/input-scrollbar-color.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>CSS Test: scrollbar-color shouldn't cause scrollbars in inputs</title>
+<link rel="author" title="Luke Warlow" href="mailto:luke@warlow.dev">
+<link rel="help" href="https://drafts.csswg.org/css-scrollbars-1/#scrollbar-color">
+<link rel="match" href="input-scrollbar-color-ref.html">
+<style>
+    :root {
+        scrollbar-color: red yellow;
+    }
+</style>
+<input>
diff --git a/tests/wpt/web-platform-tests/css/css-scrollbars/scrollbar-width-009.html b/tests/wpt/web-platform-tests/css/css-scrollbars/scrollbar-width-009.html
new file mode 100644
index 00000000000..494ffe34469
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scrollbars/scrollbar-width-009.html
@@ -0,0 +1,60 @@
+<meta charset="utf-8">
+<title>CSS Scrollbars: scrollbar-width on the body is not propagated quirks mode</title>
+<link rel="author" title="Luke Warlow" href="mailto:luke@warlow.dev" />
+<link rel="help" href="https://drafts.csswg.org/css-scrollbars-1/" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<style>
+  :root {
+    /* CSS scrollbar properties applied to the root element
+       will be propagated to the viewport. */
+    scrollbar-width: thin;
+    overflow: visible;
+  }
+
+  body {
+    /* overflow is propagated as well */
+    overflow: scroll;
+    /* but CSS scrollbar properties applied to the body are not propagated */
+    scrollbar-width: none;
+  }
+
+  :root,
+  body {
+    margin: 0;
+    padding: 0;
+  }
+
+  #content {
+    height: 10vh;
+    width: 100%;
+    background: lightsalmon;
+  }
+
+  #expander {
+    /* force vertical scroll */
+    height: 200vh;
+    width: 300px;
+    background: gray;
+  }
+</style>
+
+<body>
+
+  <div id="content"></div>
+
+  <div id="expander"></div>
+
+  <script>
+    test(function () {
+      let root = document.documentElement;
+      let body = document.body;
+      let content = document.getElementById('content');
+
+      assert_less_than(root.offsetWidth, window.innerWidth, "viewport has a scrollbar");
+      assert_equals(body.offsetWidth, root.offsetWidth, "body matches root");
+      assert_equals(content.offsetWidth, body.offsetWidth, "content matches body");
+    }, "viewport displays a scrollbar");
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/animation/shape-outside-composition.html b/tests/wpt/web-platform-tests/css/css-shapes/animation/shape-outside-composition.html
index 0115148ec1a..c1c29f1aa94 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/animation/shape-outside-composition.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/animation/shape-outside-composition.html
@@ -92,8 +92,8 @@ test_composition({
   addFrom: 'ellipse()',
   addTo: 'ellipse(closest-side farthest-side)',
 }, [
-  {at: 0.25, expect: 'ellipse(at 50% 50%)'},
-  {at: 0.75, expect: 'ellipse(closest-side farthest-side at 50% 50%)'},
+  {at: 0.25, expect: 'ellipse()'},
+  {at: 0.75, expect: 'ellipse(closest-side farthest-side)'},
 ]);
 
 test_composition({
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-circle-ellipse-serialization.html b/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-circle-ellipse-serialization.html
index 5e4842d234f..715593d47b1 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-circle-ellipse-serialization.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-circle-ellipse-serialization.html
@@ -25,14 +25,14 @@ checkEquals("ellipse(at right calc(10% + 5px))",
             "ellipse(at 100% calc(10% + 5px))");
 
 // Only 2 or 4 value form allowed
-checkEquals("circle()", "circle(at 50% 50%)");
-checkEquals("circle(0px)", "circle(0px at 50% 50%)");
-checkEquals("circle(closest-side)", "circle(at 50% 50%)");
+checkEquals("circle()", "circle()");
+checkEquals("circle(0px)", "circle(0px)");
+checkEquals("circle(closest-side)", "circle()");
 checkEquals("circle(farthest-side)",
-            "circle(farthest-side at 50% 50%)");
-checkEquals("ellipse()", "ellipse(at 50% 50%)");
+            "circle(farthest-side)");
+checkEquals("ellipse()", "ellipse()");
 checkEquals("ellipse(closest-side farthest-side)",
-            "ellipse(closest-side farthest-side at 50% 50%)");
+            "ellipse(closest-side farthest-side)");
 
 
 checkEquals("circle(at top 0% right 5px)", "circle(at right 5px top 0%)");
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-interpolation.html b/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-interpolation.html
index beea230697f..5617ea28634 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/basic-shape-interpolation.html
@@ -29,7 +29,7 @@ test(function(t) {
   getComputedStyle(div).shapeOutside;
 
   div.style.shapeOutside = 'circle(26px)';
-  assert_equals(getComputedStyle(div).shapeOutside, 'circle(0px at 50% 50%)',
+  assert_equals(getComputedStyle(div).shapeOutside, 'circle(0px)',
                 'The radius of circle is clamped to zero at 61%');
 }, 'Test circle with negative easing on shape-outside');
 
@@ -42,7 +42,7 @@ test(function(t) {
 
   div.style.shapeOutside = 'ellipse(26px 26px)';
   assert_equals(getComputedStyle(div).shapeOutside,
-                'ellipse(0px 0px at 50% 50%)',
+                'ellipse(0px 0px)',
                 'The radius of ellipse is clamped to zero at 61%');
 }, 'Test ellipse with negative easing on shape-outside');
 
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid.html b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid.html
index c48974406b2..e5587c6b233 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/parsing/shape-outside-valid.html
@@ -25,17 +25,17 @@ test_valid_value("shape-outside", "inset(0px round 0px 1px 2%)");
 test_valid_value("shape-outside", "inset(0px round 0px 1px 2% 3em)");
 test_valid_value("shape-outside", "inset(10px round 20% / 0px 1px 2% 3em)");
 
-test_valid_value("shape-outside", "circle()", "circle(at 50% 50%)");
-test_valid_value("shape-outside", "circle(1px)", "circle(1px at 50% 50%)");
-test_valid_value("shape-outside", "circle(closest-side)", "circle(at 50% 50%)");
+test_valid_value("shape-outside", "circle()");
+test_valid_value("shape-outside", "circle(1px)");
+test_valid_value("shape-outside", "circle(closest-side)", "circle()");
 test_valid_value("shape-outside", "circle(at 10% 20%)");
 test_valid_value("shape-outside", "circle(farthest-side at center top)", "circle(farthest-side at 50% 0%)");
 test_valid_value("shape-outside", "circle(4% at top right)", "circle(4% at 100% 0%)");
 
-test_valid_value("shape-outside", "ellipse()", "ellipse(at 50% 50%)");
-test_valid_value("shape-outside", "ellipse(3% 2%)", "ellipse(3% 2% at 50% 50%)");
-test_valid_value("shape-outside", "ellipse(closest-side 1px)", "ellipse(closest-side 1px at 50% 50%)");
-test_valid_value("shape-outside", "ellipse(10% closest-side)", "ellipse(10% closest-side at 50% 50%)");
+test_valid_value("shape-outside", "ellipse()", "ellipse()");
+test_valid_value("shape-outside", "ellipse(3% 2%)");
+test_valid_value("shape-outside", "ellipse(closest-side 1px)");
+test_valid_value("shape-outside", "ellipse(10% closest-side)");
 test_valid_value("shape-outside", "ellipse(closest-side closest-side at 60% 70%)", "ellipse(at 60% 70%)");
 test_valid_value("shape-outside", "ellipse(at 10% 20%)");
 test_valid_value("shape-outside", "ellipse(farthest-side 4% at bottom left)", "ellipse(farthest-side 4% at 0% 100%)");
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-000.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-000.html
index a13570c1ff2..e2c735b3bbf 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-000.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-000.html
@@ -21,14 +21,14 @@
             {
               "name": "No arguments",
               "actual": "circle()",
-              "expected_inline": "circle(at 50% 50%)",
-              "expected_computed": "circle(at 50% 50%)"
+              "expected_inline": "circle()",
+              "expected_computed": "circle()"
             },
             {
               "name": "Radial argument only",
               "actual": "circle(50px)",
-              "expected_inline": "circle(50px at 50% 50%)",
-              "expected_computed": "circle(50px at 50% 50%)"
+              "expected_inline": "circle(50px)",
+              "expected_computed": "circle(50px)"
             },
             {
               "name": "Position argument only",
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-006.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-006.html
index 2fe988d6268..15308ed9d12 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-006.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-006.html
@@ -20,44 +20,84 @@
         <script type="text/javascript">
              var valid_circle_radii_tests = [
                 {
-                  "actual": "circle(+10px)",
+                  "actual": "circle(+10px at 50% 50%)",
                   "expected_inline": "circle(10px at 50% 50%)",
                   "expected_computed": "circle(10px at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+10.00px)",
+                  "actual": "circle(+10.00px at 50% 50%)",
                   "expected_inline": "circle(10px at 50% 50%)",
                   "expected_computed": "circle(10px at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+20.340px)",
+                  "actual": "circle(+20.340px at 50% 50%)",
                   "expected_inline": "circle(20.34px at 50% 50%)",
                   "expected_computed": "circle(20.34px at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+30.5px)",
+                  "actual": "circle(+30.5px at 50% 50%)",
                   "expected_inline": "circle(30.5px at 50% 50%)",
                   "expected_computed": "circle(30.5px at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+10%)",
+                  "actual": "circle(+10% at 50% 50%)",
                   "expected_inline": "circle(10% at 50% 50%)",
                   "expected_computed": "circle(10% at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+10.00%)",
+                  "actual": "circle(+10.00% at 50% 50%)",
                   "expected_inline": "circle(10% at 50% 50%)",
                   "expected_computed": "circle(10% at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+20.350%)",
+                  "actual": "circle(+20.350% at 50% 50%)",
                   "expected_inline": "circle(20.35% at 50% 50%)",
                   "expected_computed": "circle(20.35% at 50% 50%)"
                 },
                 {
-                  "actual": "circle(+30.5%)",
+                  "actual": "circle(+30.5% at 50% 50%)",
                   "expected_inline": "circle(30.5% at 50% 50%)",
                   "expected_computed": "circle(30.5% at 50% 50%)"
+                },
+                {
+                  "actual": "circle(+10px)",
+                  "expected_inline": "circle(10px)",
+                  "expected_computed": "circle(10px)"
+                },
+                {
+                  "actual": "circle(+10.00px)",
+                  "expected_inline": "circle(10px)",
+                  "expected_computed": "circle(10px)"
+                },
+                {
+                  "actual": "circle(+20.340px)",
+                  "expected_inline": "circle(20.34px)",
+                  "expected_computed": "circle(20.34px)"
+                },
+                {
+                  "actual": "circle(+30.5px)",
+                  "expected_inline": "circle(30.5px)",
+                  "expected_computed": "circle(30.5px)"
+                },
+                {
+                  "actual": "circle(+10%)",
+                  "expected_inline": "circle(10%)",
+                  "expected_computed": "circle(10%)"
+                },
+                {
+                  "actual": "circle(+10.00%)",
+                  "expected_inline": "circle(10%)",
+                  "expected_computed": "circle(10%)"
+                },
+                {
+                  "actual": "circle(+20.350%)",
+                  "expected_inline": "circle(20.35%)",
+                  "expected_computed": "circle(20.35%)"
+                },
+                {
+                  "actual": "circle(+30.5%)",
+                  "expected_inline": "circle(30.5%)",
+                  "expected_computed": "circle(30.5%)"
                 }
             ];
             invalid_circle_radii_tests = [
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-010.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-010.html
index 6d6c11a7071..609632e11ac 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-010.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-circle-010.html
@@ -20,7 +20,7 @@
         <script type="text/javascript">
             var circle_calc_tests = [];
             ParsingUtils.calcTestValues.forEach(function(value) {
-                testCase = ['circle('+ value[0] +')', 'circle('+ value[1] + ' at 50% 50%)'];
+                testCase = ['circle('+ value[0] + ' at 50% 50%)', 'circle('+ value[1] + ' at 50% 50%)'];
                 if(Object.prototype.toString.call( value[2] ) === '[object Array]' && value[2].length == 2) {
                     testCase.push([ 'circle('+ value[2][0] + ' at 50% 50%)', 'circle('+ value[2][1] + ' at 50% 50%)']);
                 } else {
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-000.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-000.html
index 532f794448c..d74ed97a766 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-000.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-000.html
@@ -21,14 +21,14 @@
                 {
                   "name": "No arguments",
                   "actual": "ellipse()",
-                  "expected_inline": "ellipse(at 50% 50%)",
-                  "expected_computed": "ellipse(at 50% 50%)"
+                  "expected_inline": "ellipse()",
+                  "expected_computed": "ellipse()"
                 },
                 {
                   "name": "Radial arguments",
                   "actual": "ellipse(50px 50px)",
-                  "expected_inline": "ellipse(50px 50px at 50% 50%)",
-                  "expected_computed": "ellipse(50px 50px at 50% 50%)"
+                  "expected_inline": "ellipse(50px 50px)",
+                  "expected_computed": "ellipse(50px 50px)"
                 },
                 {
                    "name": "Position argument",
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-006.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-006.html
index 4bd75a445a6..69cd8aca78b 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-006.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-006.html
@@ -21,61 +21,121 @@
             var valid_ellipse_radii_tests = [
                 {
                   "actual": "ellipse(+10px +20px)",
+                  "expected_inline": "ellipse(10px 20px)",
+                  "expected_computed": "ellipse(10px 20px)"
+                },
+                {
+                  "actual": "ellipse(+30px 40px)",
+                  "expected_inline": "ellipse(30px 40px)",
+                  "expected_computed": "ellipse(30px 40px)"
+                },
+                {
+                  "actual": "ellipse(50px +60px)",
+                  "expected_inline": "ellipse(50px 60px)",
+                  "expected_computed": "ellipse(50px 60px)"
+                },
+                {
+                  "actual": "ellipse(+10.00px +20.230px)",
+                  "expected_inline": "ellipse(10px 20.23px)",
+                  "expected_computed": "ellipse(10px 20.23px)"
+                },
+                {
+                  "actual": "ellipse(+30.00px 40.567px)",
+                  "expected_inline": "ellipse(30px 40.567px)",
+                  "expected_computed": "ellipse(30px 40.567px)"
+                },
+                {
+                  "actual": "ellipse(50.10px +60.7px)",
+                  "expected_inline": "ellipse(50.1px 60.7px)",
+                  "expected_computed": "ellipse(50.1px 60.7px)"
+                },
+                {
+                  "actual": "ellipse(+10% +20%)",
+                  "expected_inline": "ellipse(10% 20%)",
+                  "expected_computed": "ellipse(10% 20%)"
+                },
+                {
+                  "actual": "ellipse(+30% 40%)",
+                  "expected_inline": "ellipse(30% 40%)",
+                  "expected_computed": "ellipse(30% 40%)"
+                },
+                {
+                  "actual": "ellipse(+50% +60%)",
+                  "expected_inline": "ellipse(50% 60%)",
+                  "expected_computed": "ellipse(50% 60%)"
+                },
+                {
+                  "actual": "ellipse(+10.00% +20.230%)",
+                  "expected_inline": "ellipse(10% 20.23%)",
+                  "expected_computed": "ellipse(10% 20.23%)"
+                },
+                {
+                  "actual": "ellipse(+30.00% 40.567%)",
+                  "expected_inline": "ellipse(30% 40.567%)",
+                  "expected_computed": "ellipse(30% 40.567%)"
+                },
+                {
+                  "actual": "ellipse(50.10% +60.7%)",
+                  "expected_inline": "ellipse(50.1% 60.7%)",
+                  "expected_computed": "ellipse(50.1% 60.7%)"
+                },
+                {
+                  "actual": "ellipse(+10px +20px at 50% 50%)",
                   "expected_inline": "ellipse(10px 20px at 50% 50%)",
                   "expected_computed": "ellipse(10px 20px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+30px 40px)",
+                  "actual": "ellipse(+30px 40px at 50% 50%)",
                   "expected_inline": "ellipse(30px 40px at 50% 50%)",
                   "expected_computed": "ellipse(30px 40px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(50px +60px)",
+                  "actual": "ellipse(50px +60px at 50% 50%)",
                   "expected_inline": "ellipse(50px 60px at 50% 50%)",
                   "expected_computed": "ellipse(50px 60px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+10.00px +20.230px)",
+                  "actual": "ellipse(+10.00px +20.230px at 50% 50%)",
                   "expected_inline": "ellipse(10px 20.23px at 50% 50%)",
                   "expected_computed": "ellipse(10px 20.23px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+30.00px 40.567px)",
+                  "actual": "ellipse(+30.00px 40.567px at 50% 50%)",
                   "expected_inline": "ellipse(30px 40.567px at 50% 50%)",
                   "expected_computed": "ellipse(30px 40.567px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(50.10px +60.7px)",
+                  "actual": "ellipse(50.10px +60.7px at 50% 50%)",
                   "expected_inline": "ellipse(50.1px 60.7px at 50% 50%)",
                   "expected_computed": "ellipse(50.1px 60.7px at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+10% +20%)",
+                  "actual": "ellipse(+10% +20% at 50% 50%)",
                   "expected_inline": "ellipse(10% 20% at 50% 50%)",
                   "expected_computed": "ellipse(10% 20% at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+30% 40%)",
+                  "actual": "ellipse(+30% 40% at 50% 50%)",
                   "expected_inline": "ellipse(30% 40% at 50% 50%)",
                   "expected_computed": "ellipse(30% 40% at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+50% +60%)",
+                  "actual": "ellipse(+50% +60% at 50% 50%)",
                   "expected_inline": "ellipse(50% 60% at 50% 50%)",
                   "expected_computed": "ellipse(50% 60% at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+10.00% +20.230%)",
+                  "actual": "ellipse(+10.00% +20.230% at 50% 50%)",
                   "expected_inline": "ellipse(10% 20.23% at 50% 50%)",
                   "expected_computed": "ellipse(10% 20.23% at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(+30.00% 40.567%)",
+                  "actual": "ellipse(+30.00% 40.567% at 50% 50%)",
                   "expected_inline": "ellipse(30% 40.567% at 50% 50%)",
                   "expected_computed": "ellipse(30% 40.567% at 50% 50%)"
                 },
                 {
-                  "actual": "ellipse(50.10% +60.7%)",
+                  "actual": "ellipse(50.10% +60.7% at 50% 50%)",
                   "expected_inline": "ellipse(50.1% 60.7% at 50% 50%)",
                   "expected_computed": "ellipse(50.1% 60.7% at 50% 50%)"
                 }
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-010.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-010.html
index 07cd1e593b7..430d2621baf 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-010.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/shape-outside-ellipse-010.html
@@ -21,7 +21,7 @@
             var ellipse_calc_tests = [];
             var defaultPosition = ' at 50% 50%';
             ParsingUtils.calcTestValues.forEach(function(value) {
-                testCase = ['ellipse(farthest-side '+ value[0] +')',
+                testCase = ['ellipse(farthest-side '+ value[0] + defaultPosition + ')',
                             'ellipse(farthest-side '+ value[1] + defaultPosition +')'];
                 if(Object.prototype.toString.call( value[2] ) === '[object Array]' && value[2].length == 2) {
                     testCase.push([
@@ -34,7 +34,7 @@
                 ellipse_calc_tests.push(testCase);
             });
             ParsingUtils.calcTestValues.forEach(function(value) {
-                testCase = ['ellipse('+ value[0] +' '+ value[0] +')',
+                testCase = ['ellipse('+ value[0] +' '+ value[0] + defaultPosition + ')',
                             'ellipse('+ value[1] +' '+ value[1] + defaultPosition +')'];
                 if(Object.prototype.toString.call( value[2] ) === '[object Array]' && value[2].length == 2) {
                     testCase.push([
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/support/parsing-utils.js b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/support/parsing-utils.js
index b7c637746e0..354a64b53f5 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/support/parsing-utils.js
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/values/support/parsing-utils.js
@@ -735,31 +735,54 @@ var invalidPositions = [
 // valid radii values for circle + ellipse
 // [value, expected_inline, [expected_computed?]]
 var validCircleRadii = [
-    ['', 'at 50% 50%', 'at 50% 50%'],
-    ['50u1', '50u1 at 50% 50%'],
-    ['50%', '50% at 50% 50%'],
-    ['closest-side', 'at 50% 50%'],
-    ['farthest-side', 'farthest-side at 50% 50%']
+    ['at 50% 50%', 'at 50% 50%'],
+    ['50u1 at 50% 50%', '50u1 at 50% 50%'],
+    ['50% at 50% 50%', '50% at 50% 50%'],
+    ['closest-side at 50% 50%', 'at 50% 50%'],
+    ['farthest-side at 50% 50%', 'farthest-side at 50% 50%'],
+    ['', ''],
+    ['50u1', '50u1'],
+    ['50%', '50%'],
+    ['closest-side', ''],
+    ['farthest-side', 'farthest-side']
 ]
 var validEllipseRadii = [
-    ['', 'at 50% 50%', 'at 50% 50%'],
-    ['50u1 100u1', '50u1 100u1 at 50% 50%'],
-    ['100u1 100px', '100u1 100px at 50% 50%'],
-    ['25% 50%', '25% 50% at 50% 50%'],
-    ['50u1 25%', '50u1 25% at 50% 50%'],
-    ['25% 50u1', '25% 50u1 at 50% 50%'],
-    ['25% closest-side', '25% closest-side at 50% 50%'],
-    ['25u1 closest-side', '25u1 closest-side at 50% 50%'],
-    ['closest-side 75%', 'closest-side 75% at 50% 50%'],
-    ['closest-side 75u1', 'closest-side 75u1 at 50% 50%'],
-    ['25% farthest-side', '25% farthest-side at 50% 50%'],
-    ['25u1 farthest-side', '25u1 farthest-side at 50% 50%'],
-    ['farthest-side 75%', 'farthest-side 75% at 50% 50%'],
-    ['farthest-side 75u1', 'farthest-side 75u1 at 50% 50%'],
-    ['closest-side closest-side', 'at 50% 50%'],
-    ['farthest-side farthest-side', 'farthest-side farthest-side at 50% 50%'],
-    ['closest-side farthest-side', 'closest-side farthest-side at 50% 50%'],
-    ['farthest-side closest-side', 'farthest-side closest-side at 50% 50%']
+    ['at 50% 50%', 'at 50% 50%', 'at 50% 50%'],
+    ['50u1 100u1 at 50% 50%', '50u1 100u1 at 50% 50%'],
+    ['100u1 100px at 50% 50%', '100u1 100px at 50% 50%'],
+    ['25% 50% at 50% 50%', '25% 50% at 50% 50%'],
+    ['50u1 25% at 50% 50%', '50u1 25% at 50% 50%'],
+    ['25% 50u1 at 50% 50%', '25% 50u1 at 50% 50%'],
+    ['25% closest-side at 50% 50%', '25% closest-side at 50% 50%'],
+    ['25u1 closest-side at 50% 50%', '25u1 closest-side at 50% 50%'],
+    ['closest-side 75% at 50% 50%', 'closest-side 75% at 50% 50%'],
+    ['closest-side 75u1 at 50% 50%', 'closest-side 75u1 at 50% 50%'],
+    ['25% farthest-side at 50% 50%', '25% farthest-side at 50% 50%'],
+    ['25u1 farthest-side at 50% 50%', '25u1 farthest-side at 50% 50%'],
+    ['farthest-side 75% at 50% 50%', 'farthest-side 75% at 50% 50%'],
+    ['farthest-side 75u1 at 50% 50%', 'farthest-side 75u1 at 50% 50%'],
+    ['closest-side closest-side at 50% 50%', 'at 50% 50%'],
+    ['farthest-side farthest-side at 50% 50%', 'farthest-side farthest-side at 50% 50%'],
+    ['closest-side farthest-side at 50% 50%', 'closest-side farthest-side at 50% 50%'],
+    ['farthest-side closest-side at 50% 50%', 'farthest-side closest-side at 50% 50%'],
+    ['', ''],
+    ['50u1 100u1', '50u1 100u1'],
+    ['100u1 100px', '100u1 100px'],
+    ['25% 50%', '25% 50%'],
+    ['50u1 25%', '50u1 25%'],
+    ['25% 50u1', '25% 50u1'],
+    ['25% closest-side', '25% closest-side'],
+    ['25u1 closest-side', '25u1 closest-side'],
+    ['closest-side 75%', 'closest-side 75%'],
+    ['closest-side 75u1', 'closest-side 75u1'],
+    ['25% farthest-side', '25% farthest-side'],
+    ['25u1 farthest-side', '25u1 farthest-side'],
+    ['farthest-side 75%', 'farthest-side 75%'],
+    ['farthest-side 75u1', 'farthest-side 75u1'],
+    ['closest-side closest-side', ''],
+    ['farthest-side farthest-side', 'farthest-side farthest-side'],
+    ['closest-side farthest-side', 'closest-side farthest-side'],
+    ['farthest-side closest-side', 'farthest-side closest-side']
 ]
 
 var validInsets = [
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-005.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-005.html
index 9924106f4b7..13de65d8a73 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-005.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-005.html
@@ -110,6 +110,32 @@
         {at: 2, expect: 'ray(-90deg farthest-corner)'},
       ]);
 
+      test_interpolation({
+        property: 'offset-path',
+        from: 'ray(-10deg farthest-corner at 0% 0px)',
+        to: 'ray(-50deg farthest-corner at 100% 100px)'
+      }, [
+        {at: -1, expect: 'ray(30deg farthest-corner at -100% -100px)'},
+        {at: 0, expect: 'ray(-10deg farthest-corner at 0% 0px)'},
+        {at: 0.125, expect: 'ray(-15deg farthest-corner at 12.5% 12.5px)'},
+        {at: 0.875, expect: 'ray(-45deg farthest-corner at 87.5% 87.5px)'},
+        {at: 1, expect: 'ray(-50deg farthest-corner at 100% 100px)'},
+        {at: 2, expect: 'ray(-90deg farthest-corner at 200% 200px)'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-path',
+        from: 'ray(-10deg farthest-corner)',
+        to: 'ray(-50deg farthest-corner at 100% 100%)'
+      }, [
+        {at: -1, expect: 'ray(30deg farthest-corner at 0% 0%)'},
+        {at: 0, expect: 'ray(-10deg farthest-corner)'},
+        {at: 0.125, expect: 'ray(-15deg farthest-corner at 56.25% 56.25%)'},
+        {at: 0.875, expect: 'ray(-45deg farthest-corner at 93.75% 93.75%)'},
+        {at: 1, expect: 'ray(-50deg farthest-corner at 100% 100%)'},
+        {at: 2, expect: 'ray(-90deg farthest-corner at 150% 150%)'},
+      ]);
+
       // No interpolation between different sizes and/or different containment.
       test_no_interpolation({
         property: 'offset-path',
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-006.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-006.html
index a19908e4fff..5b95501909c 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-006.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-path-interpolation-006.html
@@ -62,7 +62,7 @@
         to: 'ellipse(40% 50% at 25% 25%)',
       }, [
         {at: -0.3, expect: 'ellipse(1% 0% at 57.5% 57.5%)'},
-        {at: 0, expect: 'ellipse(10% 10% at 50% 50%)'},
+        {at: 0, expect: 'ellipse(10% 10%)'},
         {at: 0.3, expect: 'ellipse(19% 22% at 42.5% 42.5%)'},
         {at: 0.6, expect: 'ellipse(28% 34% at 35% 35%)'},
         {at: 1, expect: 'ellipse(40% 50% at 25% 25%)'},
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001-ref.html
index 679b43fe705..e9a7fbb808f 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001-ref.html
@@ -15,7 +15,10 @@
 }
 #box {
   background-color: green;
-  transform: translate(483.441px, 19.1699px) rotate(37.2267deg);
+  position: relative;
+  top: 100px;
+  left: 100px;
+  transform: translate(378.441px, -85.8301px) rotate(37.2267deg);
   width: 100px;
   height: 100px;
 }
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001.html
index 527459c6fdd..d8392607569 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-001.html
@@ -17,6 +17,8 @@
 }
 #box {
   background-color: green;
+  top: 100px;
+  left: 100px;
   position: relative;
   offset-path: border-box;
   offset-distance: 15%;
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002-ref.html
index a722ec3bd3e..aad79d40d03 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002-ref.html
@@ -14,7 +14,10 @@
 }
 #box {
   background-color: green;
-  transform: translate(250px, -50px);
+  position: relative;
+  top: 100px;
+  left: 100px;
+  transform: translate(145px, -155px);
   width: 100px;
   height: 100px;
 }
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002.html
index 0abe4169400..0446e2caa16 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-002.html
@@ -17,6 +17,8 @@
 #box {
   background-color: green;
   position: relative;
+  top: 100px;
+  left: 100px;
   offset-path: padding-box;
   offset-distance: 15%;
   width: 100px;
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003-ref.html
index f6e6203f4a0..bf896aafac2 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003-ref.html
@@ -15,7 +15,10 @@
 }
 #box {
   background-color: green;
-  transform: translate(250px, -50px);
+  position: relative;
+  top: 100px;
+  left: 100px;
+  transform: translate(135px, -165px);
   width: 100px;
   height: 100px;
 }
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003.html b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003.html
index 6605d8e9a0d..d3ea7f92a8e 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-coord-box-003.html
@@ -17,6 +17,8 @@
 }
 #box {
   background-color: green;
+  top: 100px;
+  left: 100px;
   position: relative;
   offset-path: content-box;
   offset-distance: 15%;
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-geometry-box-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-geometry-box-ref.html
index eb7646db662..60870c815e1 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-geometry-box-ref.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-geometry-box-ref.html
@@ -11,7 +11,7 @@
         height: 200px;
         background-color: lime;
         transform-origin: 0px 0px;
-        transform: translate(0px, 0px);
+        transform: translate(-300px, 0px);
       }
     </style>
   </head>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011-ref.html
new file mode 100644
index 00000000000..9a477b26968
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011-ref.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: ray() path with offset-position: normal</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    transform: translate(300px, 200px) translateX(10px) rotate(-90deg) translate(50px, -50px);
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011.html
new file mode 100644
index 00000000000..cf01e2b86ec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-011.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: ray() path with offset-position: normal</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-ray-011-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#ray-function">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    offset-path: ray(90deg);
+    offset-distance: 10px;
+    offset-position: normal;
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012-ref.html
new file mode 100644
index 00000000000..dfb34bf784f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012-ref.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: ray() path with offset-position specified with position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    transform: translate(-40px, 320px);
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012.html
new file mode 100644
index 00000000000..7c921cfac85
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-012.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: ray() path with offset-position specified with position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-ray-012-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#ray-function">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    top: 100px;
+    left: 100px;
+    offset-path: ray(180deg closest-side);
+    offset-distance: 100%;
+    offset-position: 10px 90%;
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013-ref.html
new file mode 100644
index 00000000000..d6bf4c037ba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013-ref.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: ray() path with position and offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    top: 100px;
+    left: 100px;
+    transform: translate(-50px, -130px);
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013.html
new file mode 100644
index 00000000000..196ff4efd6f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-013.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: ray() path with position and offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-ray-013-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#ray-function">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    top: 100px;
+    left: 100px;
+    offset-path: ray(0deg closest-side at 100px 30%);
+    offset-distance: 100%;
+    offset-position: 10px 90%;
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014-ref.html
new file mode 100644
index 00000000000..cd0fab44c36
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014-ref.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: ray() path with default position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    top: 100px;
+    left: 100px;
+    transform: translate(150px, -150px);
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014.html b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014.html
new file mode 100644
index 00000000000..42e431de354
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-ray-014.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: ray() path with default position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-ray-014-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#ray-function">
+
+<style>
+  #outer {
+    top: 100px;
+    left: 100px;
+    position: relative;
+    width: 600px;
+    height: 400px;
+  }
+  #box {
+    background-color: green;
+    position: relative;
+    top: 100px;
+    left: 100px;
+    offset-path: ray(0deg closest-side);
+    offset-distance: 100%;
+    offset-position: normal;
+    width: 100px;
+    height: 100px;
+  }
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005-ref.html
new file mode 100644
index 00000000000..77fc954ad95
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005-ref.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: &lt;basic-shape&gt; circle() path with offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+#outer {
+  top: 100px;
+  left: 100px;
+  position: relative;
+  width: 600px;
+  height: 400px;
+}
+#box {
+  background-color: green;
+  position: relative;
+  transform: translate(300px, 200px) translate(50px, -50px);
+  width: 100px;
+  height: 100px;
+}
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005.html b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005.html
new file mode 100644
index 00000000000..0ca93306c60
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-circle-005.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: &lt;basic-shape&gt; circle() path with offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-shape-circle-005-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#valdef-offset-path-basic-shape">
+
+<style>
+#outer {
+  top: 100px;
+  left: 100px;
+  position: relative;
+  width: 600px;
+  height: 400px;
+}
+#box {
+  background-color: green;
+  position: relative;
+  offset-path: circle(100px);
+  offset-position: normal;
+  width: 100px;
+  height: 100px;
+}
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005-ref.html b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005-ref.html
new file mode 100644
index 00000000000..98504d1a385
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005-ref.html
@@ -0,0 +1,27 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test reference: &lt;basic-shape&gt; ellipse() path with offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+
+<style>
+#outer {
+  top: 100px;
+  left: 100px;
+  position: relative;
+  width: 600px;
+  height: 400px;
+}
+#box {
+  background-color: green;
+  position: relative;
+  transform: translate(300px, 200px) translate(50px, -50px);
+  width: 100px;
+  height: 100px;
+}
+</style>
+
+<div id="outer">
+  <div id="inner">
+    <div id="box"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005.html b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005.html
new file mode 100644
index 00000000000..27eae4a5c49
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-ellipse-005.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Motion Path test: &lt;basic-shape&gt; ellipse() path with offset-position</title>
+<link rel="author" title="Daniil Sakhapov" href="sakhapov@google.com">
+<link rel="match" href="offset-path-shape-ellipse-005-ref.html">
+<link rel="help" href="https://drafts.fxtf.org/motion/#valdef-offset-path-basic-shape">
+
+<style>
+#outer {
+  top: 100px;
+  left: 100px;
+  position: relative;
+  width: 600px;
+  height: 400px;
+}
+#box {
+  background-color: green;
+  position: relative;
+  offset-path: ellipse(100px 100px);
+  offset-position: normal;
+  width: 100px;
+  height: 100px;
+}
+</style>
+
+<div id="outer">
+  <div id="box"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-inset-001.html b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-inset-001.html
index dd96c42ebb3..27f5e3fc7d6 100644
--- a/tests/wpt/web-platform-tests/css/motion/offset-path-shape-inset-001.html
+++ b/tests/wpt/web-platform-tests/css/motion/offset-path-shape-inset-001.html
@@ -17,6 +17,7 @@
 #box {
   background-color: green;
   position: relative;
+  top: 100px;
   offset-path: inset(10px 10px 10px 10px);
   offset-distance: 60%;
   border-radius: 50% 50% 0 0;
diff --git a/tests/wpt/web-platform-tests/css/motion/parsing/offset-path-parsing-valid.html b/tests/wpt/web-platform-tests/css/motion/parsing/offset-path-parsing-valid.html
index 59a64b2116d..8a22b9420ee 100644
--- a/tests/wpt/web-platform-tests/css/motion/parsing/offset-path-parsing-valid.html
+++ b/tests/wpt/web-platform-tests/css/motion/parsing/offset-path-parsing-valid.html
@@ -21,6 +21,11 @@ test_valid_value("offset-path", "ray(200grad farthest-side)");
 test_valid_value("offset-path", "ray(270deg farthest-corner contain)");
 test_valid_value("offset-path", "ray(-720deg sides)");
 test_valid_value("offset-path", "ray(calc(180deg - 45deg) farthest-side)", "ray(calc(135deg) farthest-side)");
+test_valid_value("offset-path", "ray(0deg at 100px 100px)");
+test_valid_value("offset-path", "ray(0deg sides at center center)");
+test_valid_value("offset-path", "ray(0deg at center center sides)", "ray(0deg sides at center center)");
+test_valid_value("offset-path", "ray(0deg at center center contain)", "ray(0deg contain at center center)");
+test_valid_value("offset-path", "ray(at 10px 10px 0deg contain)", "ray(0deg contain at 10px 10px)");
 
 test_valid_value("offset-path", 'path("m 20 0 h -100")');
 test_valid_value("offset-path", 'path("M 0 0 L 100 100 M 100 200 L 200 200 Z L 300 300 Z")');
@@ -44,10 +49,12 @@ test_valid_value("offset-path",
 
 test_valid_value("offset-path", 'url("http://www.example.com/index.html#polyline1")');
 
-test_valid_value("offset-path", "circle(100px)", "circle(100px at 50% 50%)");
-test_valid_value("offset-path", "margin-box");
+test_valid_value("offset-path", "circle(100px)");
+test_valid_value("offset-path", "circle(100px at 50% 50%)");
+test_valid_value("offset-path", "border-box");
 test_valid_value("offset-path", "inset(10% 20% 30% 40%) border-box");
 test_valid_value("offset-path", "fill-box ellipse(50% 60%)", "ellipse(50% 60%) fill-box");
+test_valid_value("offset-path", "content-box ellipse(50% 60% at 50% 50%)", "ellipse(50% 60% at 50% 50%) content-box");
 </script>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-computed.html b/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-computed.html
index 1cbdbdb0fe2..ebb8023e6c5 100644
--- a/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-computed.html
+++ b/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-computed.html
@@ -4,7 +4,7 @@
 <meta charset="utf-8">
 <title>Motion Path Module Level 1: getComputedStyle().offsetPosition</title>
 <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-position-property">
-<meta name="assert" content="offset-position is 'auto' or a computed position.">
+<meta name="assert" content="offset-position is 'auto', 'normal', or a computed position.">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/css/support/computed-testcommon.js"></script>
@@ -18,6 +18,7 @@
 <div id="target"></div>
 <script>
 test_computed_value("offset-position", "auto");
+test_computed_value("offset-position", "normal");
 
 test_computed_value("offset-position", "left bottom", "0% 100%");
 test_computed_value("offset-position", "center center", "50% 50%");
diff --git a/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-parsing-valid.html b/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-parsing-valid.html
index f71730f89eb..bc0d19a460f 100644
--- a/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-parsing-valid.html
+++ b/tests/wpt/web-platform-tests/css/motion/parsing/offset-position-parsing-valid.html
@@ -5,7 +5,7 @@
 <title>Motion Path Module Level 1: parsing offset-position with valid values</title>
 <link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
 <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-position-property">
-<meta name="assert" content="offset-position supports the full grammar 'auto | <position>'.">
+<meta name="assert" content="offset-position supports the full grammar 'auto | normal | <position>'.">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/css/support/parsing-testcommon.js"></script>
@@ -13,6 +13,7 @@
 <body>
 <script>
 test_valid_value("offset-position", "auto");
+test_valid_value("offset-position", "normal");
 
 test_valid_value("offset-position", "left bottom");
 test_valid_value("offset-position", "center center");
diff --git a/tests/wpt/web-platform-tests/fenced-frame/resources/default-enabled-features-helper.js b/tests/wpt/web-platform-tests/fenced-frame/resources/default-enabled-features-helper.js
index 821ebf69e36..5b4c292622f 100644
--- a/tests/wpt/web-platform-tests/fenced-frame/resources/default-enabled-features-helper.js
+++ b/tests/wpt/web-platform-tests/fenced-frame/resources/default-enabled-features-helper.js
@@ -31,15 +31,23 @@ async function runDefaultEnabledFeaturesTest(t, should_load, fenced_origin,
         "frame loaded using FLEDGE or shared storage.");
 
     if (generator_api == "fledge") {
-      assert_false(
+      assert_true(
             document.featurePolicy.allowsFeature('shared-storage'),
-            "Shared storage should be disallowed if the fenced " +
+            "Shared Storage should be allowed if the fenced " +
+            "frame loaded using FLEDGE.");
+      assert_true(
+            document.featurePolicy.allowsFeature('private-aggregation'),
+            "Private Aggregation should be allowed if the fenced " +
             "frame loaded using FLEDGE.");
     } else {
       assert_true(
             document.featurePolicy.allowsFeature('shared-storage'),
-            "Shared storage should be allowed if the fenced " +
-            "frame loaded using shared storage.");
+            "Shared Storage should be allowed if the fenced " +
+            "frame loaded using Shared Storage.");
+      assert_false(
+            document.featurePolicy.allowsFeature('private-aggregation'),
+            "Private Aggregation should be disabled if the fenced " +
+            "frame loaded using Shared Storage.");
     }
   }, [generator_api]);
 }
diff --git a/tests/wpt/web-platform-tests/fetch/api/crashtests/body-window-destroy.html b/tests/wpt/web-platform-tests/fetch/api/crashtests/body-window-destroy.html
new file mode 100644
index 00000000000..646d3c5f8ce
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/api/crashtests/body-window-destroy.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<iframe srcdoc='
+  <script>
+    let a = new Blob(["a", "𢕾"], {})
+    let b = new Response(a)
+    try { let _ = b.body } catch (e) { }
+    frameElement.remove()
+    b.json().catch(() => {})
+  </script>
+'></iframe>
diff --git a/tests/wpt/web-platform-tests/fetch/content-length/resources/content-lengths.json b/tests/wpt/web-platform-tests/fetch/content-length/resources/content-lengths.json
index dac9c82dc09..ac6f1a24680 100644
--- a/tests/wpt/web-platform-tests/fetch/content-length/resources/content-lengths.json
+++ b/tests/wpt/web-platform-tests/fetch/content-length/resources/content-lengths.json
@@ -31,6 +31,22 @@
     "input": "Content-Length: 30\r\nContent-Length: 30,30",
     "output": 30
   },
+  {
+    "input": "Content-Length: 30,30\r\nContent-Length: 30,30",
+    "output": 30
+  },
+  {
+    "input": "Content-Length: 30,30,  30  \r\nContent-Length: 30  ",
+    "output": 30
+  },
+  {
+    "input": "Content-Length: 30,42\r\nContent-Length: 30",
+    "output": null
+  },
+  {
+    "input": "Content-Length: 30,42\r\nContent-Length: 30,42",
+    "output": null
+  },
   {
     "input": "Content-Length: 42,30",
     "output": null
diff --git a/tests/wpt/web-platform-tests/graphics-aria/graphics-roles.html b/tests/wpt/web-platform-tests/graphics-aria/graphics-roles.html
index 159190ed833..fd7fabbb690 100644
--- a/tests/wpt/web-platform-tests/graphics-aria/graphics-roles.html
+++ b/tests/wpt/web-platform-tests/graphics-aria/graphics-roles.html
@@ -10,6 +10,8 @@
 </head>
 <body>
 
+<p>Tests the concrete roles defined in the <a href="https://www.w3.org/TR/graphics-aria-1.0/#role_definitions">ARIA Graphics Module</a> role definitions.</p>
+
 <div role="graphics-document" data-expectedrole="graphics-document" class="ex">x</div>
 <div role="graphics-object" data-expectedrole="graphics-object" class="ex">x</div>
 <div role="graphics-symbol" data-expectedrole="graphics-symbol" class="ex">x</div>
diff --git a/tests/wpt/web-platform-tests/html-aam/roles.html b/tests/wpt/web-platform-tests/html-aam/roles.html
index 3609c26a23f..ff4986370f4 100644
--- a/tests/wpt/web-platform-tests/html-aam/roles.html
+++ b/tests/wpt/web-platform-tests/html-aam/roles.html
@@ -11,7 +11,10 @@
 </head>
 <body>
 
-<!-- Most test names correspond to unique ID defined in the https://w3c.github.io/html-aam/ spec. -->
+
+<p>Tests the computedrole mappings defined in <a href="https://w3c.github.io/html-aam/">HTML-AAM</a>. Most test names correspond to unique ID defined in the spec.<p>
+
+<p>These should remain in alphabetical order, and include all HTML tagnames. If a tag is not tested here, include a pointer to the file where it is tested, such as: <code>&lt;!-- caption -&gt; ./table-roles.html --&gt;</code></p>
 
 <a href="#" data-testname="el-a" data-expectedrole="link" class="ex">x</a>
 <a data-testname="el-a-no-href" data-expectedrole="generic" class="ex">x</a>
diff --git a/tests/wpt/web-platform-tests/html-aam/table-roles.html b/tests/wpt/web-platform-tests/html-aam/table-roles.html
index d7865f5fcca..3f1a4eccd66 100644
--- a/tests/wpt/web-platform-tests/html-aam/table-roles.html
+++ b/tests/wpt/web-platform-tests/html-aam/table-roles.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests the computedrole mappings for the table-related roles defined in <a href="https://w3c.github.io/html-aam/">HTML-AAM</a>. Most test names correspond to unique ID defined in the spec.<p>
+
 <table data-testname="el-table" data-expectedrole="table" class="ex">
   <caption data-testname="el-caption" data-expectedrole="caption" class="ex">caption</caption>
   <thead data-testname="el-thead" data-expectedrole="rowgroup" class="ex">
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html
new file mode 100644
index 00000000000..ea95d812d7a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-base.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.pushState() with an empty string URL and base URL different from document's URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<base href="/the-base">
+
+<script>
+"use strict";
+
+test(() => {
+  const before = location.pathname;
+
+  history.pushState(null, null, "");
+  assert_equals(location.pathname, before);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html
new file mode 100644
index 00000000000..72d9be6a9c4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate-whitespace.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.pushState() with a whitespace URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  location.hash = "test";
+
+  const before = location.pathname;
+
+  history.pushState(null, null, " ");
+  assert_equals(location.pathname, before, "pathname");
+  assert_equals(location.hash, "", "hash");
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html
new file mode 100644
index 00000000000..1953709269e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/pushstate.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.pushState() with an empty string URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  location.hash = "test";
+
+  history.pushState(null, null, "");
+  assert_equals(location.hash, "#test");
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html
new file mode 100644
index 00000000000..224e928de6a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-base.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.replaceState() with an empty string URL and base URL different from document's URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<base href="/the-base">
+
+<script>
+"use strict";
+
+test(() => {
+  const before = location.pathname;
+
+  history.replaceState(null, null, "");
+  assert_equals(location.pathname, before);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html
new file mode 100644
index 00000000000..7261cdf3fa1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate-whitespace.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.replaceState() with a whitespace URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  location.hash = "test";
+
+  const before = location.pathname;
+
+  history.replaceState(null, null, " ");
+  assert_equals(location.pathname, before, "pathname");
+  assert_equals(location.hash, "", "hash");
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html
new file mode 100644
index 00000000000..66b4cc6f82b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/history/the-history-interface/pushstate-replacestate-empty-string/replacestate.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>history.replaceState() with an empty string URL</title>
+<link rel="help" href="https://github.com/whatwg/html/issues/9343">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  location.hash = "test";
+
+  history.replaceState(null, null, "");
+  assert_equals(location.hash, "#test");
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js
new file mode 100644
index 00000000000..39dc3b1cc21
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js
@@ -0,0 +1,10 @@
+// META: script=/common/get-host-info.sub.js
+
+// To use document.domain, we need to start from a subdomain.
+//
+// For document.domain setter to work, some web browser require the
+// |Origin-Agent-Cluster: ?0| header to be set uniformly on the origin.
+const origin = get_host_info().OTHER_ORIGIN;
+const openee = window.open(
+  origin + '/html/browsers/origin/inheritance/resources/document-write.html')
+fetch_tests_from_window(openee);
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js.headers b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js.headers
new file mode 100644
index 00000000000..e007de4d7bf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/document-write.https.window.js.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html
new file mode 100644
index 00000000000..7a6ff3118eb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <script src="/resources/testharness.js"></script>
+    <script src="/common/get-host-info.sub.js"></script>
+  </head>
+  <body></body>
+  <script>
+    const domain_start = document.domain;
+    const domain_new = domain_start.replace(/^[^.]+\./,'');
+
+    async_test(test => {
+      const iframe = document.createElement('iframe');
+      iframe.src = './iframe-with-about-blank-iframe.html';
+      iframe.onload = test.step_func_done(() => {
+        const doc0 = frames[0].frames[0].document;
+        const doc1 = frames[0].frames[1].document;
+
+        assert_equals(doc0.domain, domain_start);
+        assert_equals(doc1.domain, domain_start);
+
+        doc0.open();
+        doc1.open();
+        assert_equals(doc0.domain, domain_start);
+        assert_equals(doc1.domain, domain_start);
+
+        document.domain = domain_new;
+        assert_equals(doc0.domain, domain_start);
+        assert_equals(doc1.domain, domain_start);
+
+        doc0.close();
+        doc1.close();
+        assert_equals(doc0.domain, domain_start);
+        assert_equals(doc1.domain, domain_start);
+      });
+      document.body.appendChild(iframe);
+    }, "document.open() do not make the callee's origin to alias the caller's"
+      + " one");
+  </script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html.headers b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html.headers
new file mode 100644
index 00000000000..e007de4d7bf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/document-write.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html
new file mode 100644
index 00000000000..b3f51252332
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+  <body>
+    <iframe src="about:blank"></iframe>
+    <iframe src=""></iframe>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers
new file mode 100644
index 00000000000..e007de4d7bf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/inheritance/resources/iframe-with-about-blank-iframe.html.headers
@@ -0,0 +1 @@
+Origin-Agent-Cluster: ?0
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.apng.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.apng.html
deleted file mode 100644
index ffe19ce9bc4..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.apng.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-<title>Canvas test: 2d.drawImage.animated.apng</title>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
-<body class="show_output">
-
-<h1>2d.drawImage.animated.apng</h1>
-<p class="desc">drawImage() of an APNG with no poster frame draws the first frame</p>
-
-
-<p class="output">Actual output:</p>
-<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
-<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
-<ul id="d"></ul>
-<script>
-var t = async_test("drawImage() of an APNG with no poster frame draws the first frame");
-_addTest(function(canvas, ctx) {
-
-  deferTest();
-  step_timeout(t.step_func_done(function () {
-      ctx.drawImage(document.getElementById('anim-gr.png'), 0, 0);
-      _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-  }), 500);
-
-});
-</script>
-<img src="/images/anim-gr.png" id="anim-gr.png" class="resource">
-
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
deleted file mode 100644
index 2d28bc12837..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-<title>Canvas test: 2d.drawImage.animated.poster</title>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
-<body class="show_output">
-
-<h1>2d.drawImage.animated.poster</h1>
-<p class="desc">drawImage() of an APNG draws the poster frame</p>
-
-
-<p class="output">Actual output:</p>
-<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
-<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
-<ul id="d"></ul>
-<script>
-promise_test(async t => {
-
-  var canvas = document.getElementById('c');
-  var ctx = canvas.getContext('2d');
-
-  const response = await fetch('/images/anim-poster-gr.png');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-
-  ctx.drawImage(bitmap, 0, 0);
-  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-
-}, "drawImage() of an APNG draws the poster frame");
-</script>
-
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html
deleted file mode 100644
index 1c4e74866ab..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/drawing-images-to-the-canvas/drawimage_zerosize-image.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<title>Canvas test: 2d.drawImage.zerosource.image</title>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
-<body class="show_output">
-
-<h1>2d.drawImage.zerosource.image</h1>
-<p class="desc">drawImage with zero-sized source rectangle from image draws nothing without exception</p>
-
-
-<p class="output">Actual output:</p>
-<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
-<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
-<ul id="d"></ul>
-<script>
-var t = async_test("drawImage with zero-sized source rectangle from image draws nothing without exception");
-_addTest(function(canvas, ctx) {
-
-ctx.fillStyle = '#0f0';
-ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zerowidth.svg'), 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zeroheight.svg'), 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zerosize.svg'), 0, 0, 100, 50);
-_assertPixel(canvas, 50,25, 0,255,0,255);
-
-
-});
-</script>
-<img src="/images/red-zerowidth.svg" id="red-zerowidth.svg" class="resource">
-<img src="/images/red-zeroheight.svg" id="red-zeroheight.svg" class="resource">
-<img src="/images/red-zerosize.svg" id="red-zerosize.svg" class="resource">
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
deleted file mode 100644
index eccf14bfd04..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-<title>OffscreenCanvas test: 2d.drawImage.animated.poster</title>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-
-<h1>2d.drawImage.animated.poster</h1>
-<p class="desc">drawImage() of an APNG draws the poster frame</p>
-
-
-<script>
-promise_test(async t => {
-
-  var canvas = new OffscreenCanvas(100, 50);
-  var ctx = canvas.getContext('2d');
-
-  const response = await fetch('/images/anim-poster-gr.png');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-
-  ctx.drawImage(bitmap, 0, 0);
-  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-
-}, "drawImage() of an APNG draws the poster frame");
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
deleted file mode 100644
index 542c9382f64..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
+++ /dev/null
@@ -1,22 +0,0 @@
-// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.drawImage.animated.poster
-// Description:drawImage() of an APNG draws the poster frame
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/html/canvas/resources/canvas-tests.js");
-
-promise_test(async t => {
-
-  var canvas = new OffscreenCanvas(100, 50);
-  var ctx = canvas.getContext('2d');
-
-  const response = await fetch('/images/anim-poster-gr.png');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-
-  ctx.drawImage(bitmap, 0, 0);
-  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-  t.done();
-}, "drawImage() of an APNG draws the poster frame");
-done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
index cd293595fe8..c2ebd265cfa 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
@@ -15,11 +15,16 @@ promise_test(async t => {
   var canvas = new OffscreenCanvas(100, 50);
   var ctx = canvas.getContext('2d');
 
-  const response = await fetch('/images/green.svg');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-  ctx.drawImage(bitmap, 0, 0);
-  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+  const img = new Image();
+  const imageLoadPromise = new Promise((resolve, reject) => {
+    img.onload = () => resolve();
+    img.onerror = (err) => reject(err);
+  });
+  img.src = '/images/green.svg';
+  await imageLoadPromise;
+
+  ctx.drawImage(img, 0, 0);
+  _assertPixelApprox(canvas, 50, 25, 0, 255, 0, 255, 2);
 
 }, "drawImage() of an SVG image");
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
deleted file mode 100644
index 8293e89f247..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
+++ /dev/null
@@ -1,21 +0,0 @@
-// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.drawImage.svg
-// Description:drawImage() of an SVG image
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/html/canvas/resources/canvas-tests.js");
-
-promise_test(async t => {
-
-  var canvas = new OffscreenCanvas(100, 50);
-  var ctx = canvas.getContext('2d');
-
-  const response = await fetch('/images/green.svg');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-  ctx.drawImage(bitmap, 0, 0);
-  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-  t.done();
-}, "drawImage() of an SVG image");
-done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
index 5dfb2f3002c..77182242d4c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
@@ -17,11 +17,23 @@ promise_test(async t => {
 
   ctx.fillStyle = '#0f0';
   ctx.fillRect(0, 0, 100, 50);
-  const response = await fetch('/images/red-zerowidth.svg');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-  ctx.drawImage(bitmap, 0, 0, 100, 50);
-  _assertPixel(canvas, 50,25, 0,255,0,255);
+
+  function loadImage(src) {
+    return new Promise((resolve, reject) => {
+      const img = new Image();
+      img.onload = () => resolve(img);
+      img.onerror = (err) => reject(err);
+      img.src = src;
+    });
+  }
+  const img1 = await loadImage('/images/red-zerowidth.svg');
+  const img2 = await loadImage('/images/red-zeroheight.svg');
+  const img3 = await loadImage('/images/red-zerosize.svg');
+
+  ctx.drawImage(img1, 0, 0, 100, 50);
+  ctx.drawImage(img2, 0, 0, 100, 50);
+  ctx.drawImage(img3, 0, 0, 100, 50);
+  _assertPixel(canvas, 50, 25, 0, 255, 0, 255);
 
 }, "drawImage with zero-sized source rectangle from image draws nothing without exception");
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
deleted file mode 100644
index 467beb4d12f..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
+++ /dev/null
@@ -1,23 +0,0 @@
-// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.drawImage.zerosource.image
-// Description:drawImage with zero-sized source rectangle from image draws nothing without exception
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/html/canvas/resources/canvas-tests.js");
-
-promise_test(async t => {
-
-  var canvas = new OffscreenCanvas(100, 50);
-  var ctx = canvas.getContext('2d');
-
-  ctx.fillStyle = '#0f0';
-  ctx.fillRect(0, 0, 100, 50);
-  const response = await fetch('/images/red-zerowidth.svg');
-  const blob = await response.blob();
-  const bitmap = await createImageBitmap(blob);
-  ctx.drawImage(bitmap, 0, 0, 100, 50);
-  _assertPixel(canvas, 50,25, 0,255,0,255);
-  t.done();
-}, "drawImage with zero-sized source rectangle from image draws nothing without exception");
-done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html
deleted file mode 100644
index 4ee68b430fd..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-<link rel="help" href="https://html.spec.whatwg.org/#offscreencontext2d-commit">
-<script>
-
-function verifyPlaceholder(placeholder, expectedR, expectedG, expectedB, expectedA, expectedClrStr)
-{
-    var canvas = document.createElement('canvas');
-    canvas.width = canvas.height = 10;
-    var ctx = canvas.getContext('2d');
-    ctx.drawImage(placeholder, 0, 0);
-    _assertPixel(canvas, 5,5, expectedR, expectedG, expectedB, expectedA);
-}
-
-async_test(function(t) {
-    var placeholder = document.createElement('canvas');
-    placeholder.width = placeholder.height = 10;
-    var offscreenCanvas = placeholder.transferControlToOffscreen();
-    var ctx = offscreenCanvas.getContext('2d');
-    ctx.fillStyle = "#0f0";
-    ctx.fillRect(0, 0, 10, 10);
-    // commit() propagation is taken care of by an async task, which means the
-    // place holder contents should still be transparent black at this moment.
-    verifyPlaceholder(placeholder, 0,0,0,0, "0,0,0,0");
-    // Set timeout acts as a sync barrier to allow commit to propagate
-    t.step_timeout(function() {
-        verifyPlaceholder(placeholder, 0,255,0,255, "0,255,0,255");
-        t.done();
-    }, 0);
-}, "Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.");
-
-test(function() {
-    var offscreenCanvas = new OffscreenCanvas(10, 10);
-    var ctx = offscreenCanvas.getContext('2d');
-    ctx.fillStyle = "#0f0";
-    ctx.fillRect(0, 0, 10, 10);
-    ctx.commit();
-}, "Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement is a noop.");
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html
deleted file mode 100644
index 7d1d2c85f9c..00000000000
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.commit.w.html
+++ /dev/null
@@ -1,79 +0,0 @@
-<!DOCTYPE html>
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/html/canvas/resources/canvas-tests.js"></script>
-<link rel="help" href="https://html.spec.whatwg.org/#offscreencontext2d-commit">
-
-<script id="myWorker" type="text/worker">
-
-function testCommitPushesContents(offscreenCanvas) {
-  try {
-    var ctx = offscreenCanvas.getContext('2d');
-    ctx.fillStyle = "#0f0";
-    ctx.fillRect(0, 0, 10, 10);
-    ctx.commit();
-    return true;
-  } catch(e) {
-    return false;
-  }
-}
-
-function testCommitException() {
-    var offscreenCanvas = new OffscreenCanvas(10, 10);
-    var ctx = offscreenCanvas.getContext('2d');
-    ctx.fillStyle = "#0f0";
-    ctx.fillRect(0, 0, 10, 10);
-    return true;
-}
-
-self.onmessage = function(e) {
-    switch (e.data.msg) {
-        case 'test1':
-            self.postMessage(testCommitPushesContents(e.data.data));
-            break;
-        case 'test2':
-            self.postMessage(testCommitException());
-            break;
-    }
-};
-
-</script>
-
-<script>
-
-function verifyPlaceholder(placeholder) {
-    var canvas = document.createElement('canvas');
-    canvas.width = canvas.height = 10;
-    var ctx = canvas.getContext('2d');
-    ctx.drawImage(placeholder, 0, 0);
-    _assertPixel(canvas, 5,5, 0,255,0,255);
-}
-
-function makeWorker(test) {
-    var blob = new Blob([document.getElementById("myWorker").textContent]);
-    var worker = new Worker(URL.createObjectURL(blob));
-    worker.onerror = test.unreached_func("error");
-    return worker;
-}
-
-async_test(function(t) {
-    var placeholder = document.createElement('canvas');
-    placeholder.width = placeholder.height = 10;
-    var offscreenCanvas = placeholder.transferControlToOffscreen();
-    var worker = makeWorker(t);
-    worker.addEventListener('message', t.step_func_done(function(msg) {
-      assert_true(msg.data);
-      verifyPlaceholder(placeholder);
-    }));
-    worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
-}, "Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.");
-
-async_test(function(t) {
-    var worker = makeWorker(t);
-    worker.addEventListener('message', t.step_func_done(function(msg) {
-        assert_true(msg.data);
-    }));
-    worker.postMessage({msg: 'test2'});
-}, "Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement throws an exception in a worker.");
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/PRESUBMIT.py b/tests/wpt/web-platform-tests/html/canvas/tools/PRESUBMIT.py
index 048e96b7012..c7fb93ae6fd 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/PRESUBMIT.py
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/PRESUBMIT.py
@@ -7,8 +7,6 @@ See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
-USE_PYTHON3 = True
-
 
 def CommonChecks(input_api, output_api):
     return input_api.canned_checks.RunPylint(input_api, output_api)
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/gentestutilsunion.py b/tests/wpt/web-platform-tests/html/canvas/tools/gentestutilsunion.py
index cf154c41894..0542e32571a 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/gentestutilsunion.py
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/gentestutilsunion.py
@@ -28,7 +28,7 @@
 #
 # * Test the tests, add new ones to Git, remove deleted ones from Git, etc.
 
-from typing import Any, List, Mapping, MutableMapping, Optional, Set, Tuple
+from typing import Any, List, Mapping, Optional, Set, Tuple
 
 import re
 import collections
@@ -40,7 +40,6 @@ import jinja2
 import os
 import pathlib
 import sys
-import textwrap
 
 try:
     import cairocffi as cairo  # type: ignore
@@ -236,14 +235,14 @@ def _expand_test_code(code: str) -> str:
     return code
 
 
-class TestType(str, enum.Enum):
+class CanvasType(str, enum.Enum):
     HTML_CANVAS = 'htmlcanvas'
     OFFSCREEN_CANVAS = 'offscreencanvas'
     WORKER = 'worker'
 
 
-def _get_enabled_test_types(test: Mapping[str, Any]) -> Set[TestType]:
-    return {TestType(t.lower()) for t in test.get('canvasType', TestType)}
+def _get_enabled_canvas_types(test: Mapping[str, Any]) -> Set[CanvasType]:
+    return {CanvasType(t.lower()) for t in test.get('canvasType', CanvasType)}
 
 
 @dataclasses.dataclass
@@ -252,104 +251,142 @@ class TestConfig:
     image_out_dir: str
 
 
-_CANVAS_SIZE_REGEX = re.compile(r'(?P<width>.*), (?P<height>.*)',
-                                re.MULTILINE | re.DOTALL)
+def _validate_test(test: Mapping[str, Any]):
+    if test.get('expected', '') == 'green' and re.search(
+            r'@assert pixel .* 0,0,0,0;', test['code']):
+        print('Probable incorrect pixel test in %s' % test['name'])
 
-
-def _get_canvas_size(test: Mapping[str, Any]):
-    size = test.get('size', '100, 50')
-    match = _CANVAS_SIZE_REGEX.match(size)
-    if not match:
+    if 'size' in test and (not isinstance(test['size'], list)
+                           or len(test['size']) != 2):
         raise InvalidTestDefinitionError(
-            'Invalid canvas size "%s" in test %s. Expected a string matching '
-            'this pattern: "%%s, %%s" %% (width, height)' %
-            (size, test['name']))
-    return match.group('width'), match.group('height')
+            f'Invalid canvas size "{test["size"]}" in test {test["name"]}. '
+            'Expected an array with two numbers.')
 
-
-def _write_reference_test(test: Mapping[str, Any],
-                          jinja_env: jinja2.Environment,
-                          template_params: MutableMapping[str, Any],
-                          enabled_tests: Set[TestType],
-                          canvas_path: str, offscreen_path: str):
-    name = template_params["name"]
-    js_ref = test.get('reference')
-    html_ref = test.get('html_reference')
-    if js_ref is not None and html_ref is not None:
+    if 'test_type' in test and test['test_type'] != 'promise':
         raise InvalidTestDefinitionError(
-            f'Test {name} is invalid, "reference" and "html_reference" can\'t '
-            'both be specified at the same time.')
+            f'Test {test["name"]}\' test_type is invalid, it only accepts '
+            '"promise" now for creating promise test type in the template '
+            'file.')
 
-    ref_params = template_params.copy()
-    ref_params.update({'code': js_ref or html_ref})
-    ref_template_name = 'reftest_element.html' if js_ref else 'reftest.html'
-    if TestType.HTML_CANVAS in enabled_tests:
-        pathlib.Path(f'{canvas_path}-expected.html').write_text(
-            jinja_env.get_template(ref_template_name).render(ref_params),
-            'utf-8')
-    if {TestType.OFFSCREEN_CANVAS, TestType.WORKER} & enabled_tests:
-        pathlib.Path(f'{offscreen_path}-expected.html').write_text(
-            jinja_env.get_template(ref_template_name).render(ref_params),
-            'utf-8')
+    if 'reference' in test and 'html_reference' in test:
+        raise InvalidTestDefinitionError(
+            f'Test {test["name"]} is invalid, "reference" and "html_reference" '
+            'can\'t both be specified at the same time.')
 
-    params = template_params.copy()
+
+def _render_template(jinja_env: jinja2.Environment,
+                     template: jinja2.Template,
+                     params: Mapping[str, Any]) -> str:
+    """Renders the specified jinja template.
+
+    The template is repetitively rendered until no more changes are observed.
+    This allows for template parameters to refer to other template parameters.
+    """
+    rendered = template.render(params)
+    previous = ''
+    while rendered != previous:
+        previous = rendered
+        template = jinja_env.from_string(rendered)
+        rendered = template.render(params)
+    return rendered
+
+
+def _render(jinja_env: jinja2.Environment, template_name: str,
+            params: Mapping[str, Any]):
+    params = dict(params)
     params.update({
-        'ref_link': f'{name}-expected.html',
-        'fuzzy': test.get('fuzzy')
+        # Render the code on its own, as it could contain templates expanding
+        # to multuple lines. This is needed to get proper indentation of the
+        # code in the main template.
+        'code': _render_template(jinja_env,
+                                 jinja_env.from_string(params['code']),
+                                 params)
     })
-    if TestType.HTML_CANVAS in enabled_tests:
+
+    return _render_template(jinja_env, jinja_env.get_template(template_name),
+                            params)
+
+
+def _write_reference_test(jinja_env: jinja2.Environment,
+                          params: Mapping[str, Any],
+                          enabled_tests: Set[CanvasType],
+                          canvas_path: str, offscreen_path: str):
+    if CanvasType.HTML_CANVAS in enabled_tests:
+        html_params = dict(params)
+        html_params.update({'canvas_type': CanvasType.HTML_CANVAS.value})
         pathlib.Path(f'{canvas_path}.html').write_text(
-            jinja_env.get_template("reftest_element.html").render(params),
-            'utf-8')
-    if TestType.OFFSCREEN_CANVAS in enabled_tests:
+            _render(jinja_env, "reftest_element.html", html_params), 'utf-8')
+    if CanvasType.OFFSCREEN_CANVAS in enabled_tests:
+        offscreen_params = dict(params)
+        offscreen_params.update({
+            'canvas_type': CanvasType.OFFSCREEN_CANVAS.value
+        })
         pathlib.Path(f'{offscreen_path}.html').write_text(
-            jinja_env.get_template("reftest_offscreen.html").render(params),
+            _render(jinja_env, "reftest_offscreen.html", offscreen_params),
             'utf-8')
-    if TestType.WORKER in enabled_tests:
+    if CanvasType.WORKER in enabled_tests:
+        worker_params = dict(params)
+        worker_params.update({'canvas_type': CanvasType.WORKER.value})
         pathlib.Path(f'{offscreen_path}.w.html').write_text(
-            jinja_env.get_template("reftest_worker.html").render(params),
-            'utf-8')
+            _render(jinja_env, "reftest_worker.html", worker_params), 'utf-8')
+
+    js_ref = params.get('reference', '')
+    html_ref = params.get('html_reference', '')
+    ref_params = dict(params)
+    ref_params.update({
+        'is_test_reference': True,
+        'code': js_ref or html_ref
+    })
+    ref_template_name = 'reftest_element.html' if js_ref else 'reftest.html'
+    if CanvasType.HTML_CANVAS in enabled_tests:
+        pathlib.Path(f'{canvas_path}-expected.html').write_text(
+            _render(jinja_env, ref_template_name, ref_params), 'utf-8')
+    if {CanvasType.OFFSCREEN_CANVAS, CanvasType.WORKER} & enabled_tests:
+        pathlib.Path(f'{offscreen_path}-expected.html').write_text(
+            _render(jinja_env, ref_template_name, ref_params), 'utf-8')
 
 
 def _write_testharness_test(jinja_env: jinja2.Environment,
-                            template_params: MutableMapping[str, Any],
-                            enabled_tests: Set[TestType],
+                            params: Mapping[str, Any],
+                            enabled_tests: Set[CanvasType],
                             canvas_path: str,
                             offscreen_path: str):
     # Create test cases for canvas and offscreencanvas.
-    if TestType.HTML_CANVAS in enabled_tests:
+    if CanvasType.HTML_CANVAS in enabled_tests:
+        html_params = dict(params)
+        html_params.update({'canvas_type': CanvasType.HTML_CANVAS.value})
         pathlib.Path(f'{canvas_path}.html').write_text(
-            jinja_env.get_template("testharness_element.html").render(
-                template_params), 'utf-8')
+            _render(jinja_env, "testharness_element.html", html_params),
+            'utf-8')
 
-    template_params['done_needed'] = ('then(t_pass, t_fail);'
-                                      not in template_params['code'])
-
-    if TestType.OFFSCREEN_CANVAS in enabled_tests:
+    if CanvasType.OFFSCREEN_CANVAS in enabled_tests:
+        offscreen_params = dict(params)
+        offscreen_params.update({
+            'canvas_type': CanvasType.OFFSCREEN_CANVAS.value
+        })
         pathlib.Path(f'{offscreen_path}.html').write_text(
-            jinja_env.get_template("testharness_offscreen.html").render(
-                template_params), 'utf-8')
+            _render(jinja_env, "testharness_offscreen.html", offscreen_params),
+            'utf-8')
 
-    if TestType.WORKER in enabled_tests:
+    if CanvasType.WORKER in enabled_tests:
+        worker_params = dict(params)
+        worker_params.update({'canvas_type': CanvasType.WORKER.value})
         pathlib.Path(f'{offscreen_path}.worker.js').write_text(
-            jinja_env.get_template("testharness_worker.js").render(
-                template_params), 'utf-8')
+            _render(jinja_env, "testharness_worker.js", worker_params),
+            'utf-8')
 
 
 def _generate_test(test: Mapping[str, Any], jinja_env: jinja2.Environment,
-                   sub_dir: str, enabled_tests: Set[TestType],
+                   sub_dir: str, enabled_tests: Set[CanvasType],
                    html_canvas_cfg: TestConfig,
                    offscreen_canvas_cfg: TestConfig) -> None:
+    _validate_test(test)
+
     name = test['name']
 
-    if test.get('expected', '') == 'green' and re.search(
-            r'@assert pixel .* 0,0,0,0;', test['code']):
-        print('Probable incorrect pixel test in %s' % name)
-
-    expectation_html = ''
+    expected_img = None
     if 'expected' in test and test['expected'] is not None:
         expected = test['expected']
-        expected_img = None
         if expected == 'green':
             expected_img = '/images/green-100x50.png'
         elif expected == 'clear':
@@ -362,14 +399,14 @@ def _generate_test(test: Mapping[str, Any], jinja_env: jinja2.Environment,
                 r'surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, \1, \2)'
                 r'\ncr = cairo.Context(surface)', expected)
 
-            if TestType.HTML_CANVAS in enabled_tests:
+            if CanvasType.HTML_CANVAS in enabled_tests:
                 expected_canvas = (
                     expected + "\nsurface.write_to_png('%s.png')\n" %
                     os.path.join(html_canvas_cfg.image_out_dir, sub_dir, name))
                 eval(compile(expected_canvas, '<test %s>' % name, 'exec'), {},
                     {'cairo': cairo})
 
-            if {TestType.OFFSCREEN_CANVAS, TestType.WORKER} & enabled_tests:
+            if {CanvasType.OFFSCREEN_CANVAS, CanvasType.WORKER} & enabled_tests:
                 expected_offscreen = (
                     expected +
                     "\nsurface.write_to_png('%s.png')\n" % os.path.join(
@@ -379,53 +416,18 @@ def _generate_test(test: Mapping[str, Any], jinja_env: jinja2.Environment,
 
             expected_img = '%s.png' % name
 
-        if expected_img:
-            expectation_html = (
-                '<p class="output expectedtext">Expected output:<p>'
-                '<img src="%s" class="output expected" id="expected" '
-                'alt="">' % expected_img)
-
-    width, height = _get_canvas_size(test)
-
-    images = ''
-    for src in test.get('images', []):
-        img_id = src.split('/')[-1]
-        if '/' not in src:
-            src = '../images/%s' % src
-        images += '<img src="%s" id="%s" class="resource">\n' % (src, img_id)
-    for src in test.get('svgimages', []):
-        img_id = src.split('/')[-1]
-        if '/' not in src:
-            src = '../images/%s' % src
-        images += ('<svg><image xlink:href="%s" id="%s" class="resource">'
-                   '</svg>\n' % (src, img_id))
-    images = images.replace('../images/', '/images/')
-
-    is_promise_test = False
-    if 'test_type' in test:
-        if test['test_type'] == 'promise':
-            is_promise_test = True
-        else:
-            raise InvalidTestDefinitionError(
-                f'Test {name}\' test_type is invalid, it only accepts '
-                '"promise" now for creating promise test type in the template '
-                'file.')
-
-    template_params = {
-        'name': name,
-        'desc': test.get('desc', ''),
-        'notes': test.get('notes', ''),
-        'images': images,
-        'timeout': test.get('timeout'),
-        'canvas': test.get('canvas', ''),
-        'width': width,
-        'height': height,
-        'expected': expectation_html,
-        'code': _expand_test_code(test['code']),
-        'attributes': test.get('attributes', ''),
-        'promise_test': is_promise_test
+    # Defaults:
+    params = {
+        'desc': '',
+        'size': [100, 50],
     }
 
+    params.update(test)
+    params.update({
+        'code': _expand_test_code(test['code']),
+        'expected_img': expected_img
+    })
+
     canvas_path = os.path.join(html_canvas_cfg.out_dir, sub_dir, name)
     offscreen_path = os.path.join(offscreen_canvas_cfg.out_dir, sub_dir, name)
     if 'manual' in test:
@@ -433,11 +435,11 @@ def _generate_test(test: Mapping[str, Any], jinja_env: jinja2.Environment,
         offscreen_path += '-manual'
 
     if 'reference' in test or 'html_reference' in test:
-        _write_reference_test(test, jinja_env, template_params, enabled_tests,
+        _write_reference_test(jinja_env, params, enabled_tests,
                               canvas_path, offscreen_path)
     else:
-        _write_testharness_test(jinja_env, template_params, enabled_tests,
-                                canvas_path, offscreen_path)
+        _write_testharness_test(jinja_env, params, enabled_tests, canvas_path,
+                                offscreen_path)
 
 
 def genTestUtils_union(NAME2DIRFILE: str) -> None:
@@ -499,32 +501,26 @@ def genTestUtils_union(NAME2DIRFILE: str) -> None:
             test = original_test.copy()
             if variant_name or variant_params:
                 test['name'] += '.' + variant_name
-                test['code'] = test['code'] % variant_params
-                if 'reference' in test:
-                    test['reference'] = test['reference'] % variant_params
-                if 'html_reference' in test:
-                    test['html_reference'] = (
-                        test['html_reference'] % variant_params)
                 test.update(variant_params)
 
             name = test['name']
             print('\r(%s)' % name, ' ' * 32, '\t')
 
-            enabled_test_types = _get_enabled_test_types(test)
+            enabled_canvas_types = _get_enabled_canvas_types(test)
 
             already_tested = used_tests[name].intersection(
-                enabled_test_types)
+                enabled_canvas_types)
             if already_tested:
                 raise InvalidTestDefinitionError(
                     f'Test {name} is defined twice for types {already_tested}')
-            used_tests[name].update(enabled_test_types)
+            used_tests[name].update(enabled_canvas_types)
 
             sub_dir = _get_test_sub_dir(name, name_to_sub_dir)
             _generate_test(
                 test,
                 jinja_env,
                 sub_dir,
-                enabled_test_types,
+                enabled_canvas_types,
                 html_canvas_cfg=TestConfig(
                     out_dir=CANVASOUTPUTDIR,
                     image_out_dir=CANVASIMAGEOUTPUTDIR),
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest.html
index 8f98e164845..4c9affbbbbf 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest.html
@@ -1,15 +1,14 @@
 <!DOCTYPE html>
 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-{% if ref_link %}<link rel="match" href="{{ ref_link }}">
-{% endif %}
-{% if fuzzy %}<meta name=fuzzy content="{{ fuzzy }}">
-{% endif %}
-{% if timeout %}<meta name="timeout" content="{{ timeout }}">
-{% endif %}
 <title>Canvas test: {{ name }}</title>
 <h1>{{ name }}</h1>
 <p class="desc">{{ desc }}</p>
 {% if notes %}<p class="notes">{{ notes }}{% endif %}
 
 {{ code | trim }}
-{{ images -}}
+{% for image in images %}
+<img src="/images/{{ image }}" id="{{ image }}" class="resource">
+{% endfor -%}
+{% for svgimage in svgimages %}
+<svg><image xlink:href="/images/{{ svgimage }}" id="{{ svgimage }}" class="resource"></svg>
+{% endfor -%}
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_element.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_element.html
index 25445af6a4f..6684e9c615b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_element.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_element.html
@@ -1,28 +1,34 @@
 <!DOCTYPE html>
 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-{% if promise_test %}<html class="reftest-wait">
-{% endif %}
-{% if ref_link %}<link rel="match" href="{{ ref_link }}">
+{% if test_type == 'promise' %}<html class="reftest-wait">
 {% endif %}
+{% if not is_test_reference %}
+<link rel="match" href="{{ name }}-expected.html">
 {% if fuzzy %}<meta name=fuzzy content="{{ fuzzy }}">
 {% endif %}
+{% endif %}
 {% if timeout %}<meta name="timeout" content="{{ timeout }}">
 {% endif %}
 <title>Canvas test: {{ name }}</title>
 <h1>{{ name }}</h1>
 <p class="desc">{{ desc }}</p>
 {% if notes %}<p class="notes">{{ notes }}{% endif %}
-<canvas id="canvas" width="{{ width }}" height="{{ height }}"{{ canvas }}>
+<canvas id="canvas" width="{{ size[0] }}" height="{{ size[1] }}"{{ canvas }}>
   <p class="fallback">FAIL (fallback content)</p>
 </canvas>
-<script{% if promise_test %} type="module"{% endif %}>
+<script{% if test_type == 'promise' %} type="module"{% endif %}>
   const canvas = document.getElementById("canvas");
   const ctx = canvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %});
 
   {{ code | trim | indent(2) }}
-  {% if promise_test %}
+  {% if test_type == 'promise' %}
   document.documentElement.classList.remove("reftest-wait");
   {% endif %}
 </script>
-{{ images -}}
-{% if promise_test %}</html>{% endif %}
+{% for image in images %}
+<img src="/images/{{ image }}" id="{{ image }}" class="resource">
+{% endfor -%}
+{% for svgimage in svgimages %}
+<svg><image xlink:href="/images/{{ svgimage }}" id="{{ svgimage }}" class="resource"></svg>
+{% endfor -%}
+{% if test_type == 'promise' %}</html>{% endif %}
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_offscreen.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_offscreen.html
index 4d8b7c9de54..1d0d93dfa16 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_offscreen.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_offscreen.html
@@ -1,9 +1,8 @@
 <!DOCTYPE html>
 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
-{% if promise_test %}<html class="reftest-wait">
-{% endif %}
-{% if ref_link %}<link rel="match" href="{{ ref_link }}">
+{% if test_type == 'promise' %}<html class="reftest-wait">
 {% endif %}
+<link rel="match" href="{{ name }}-expected.html">
 {% if fuzzy %}<meta name=fuzzy content="{{ fuzzy }}">
 {% endif %}
 {% if timeout %}<meta name="timeout" content="{{ timeout }}">
@@ -12,20 +11,19 @@
 <h1>{{ name }}</h1>
 <p class="desc">{{ desc }}</p>
 {% if notes %}<p class="notes">{{ notes }}{% endif %}
-<canvas id="canvas" width="{{ width }}" height="{{ height }}"{{ canvas }}>
+<canvas id="canvas" width="{{ size[0] }}" height="{{ size[1] }}"{{ canvas }}>
   <p class="fallback">FAIL (fallback content)</p>
 </canvas>
-<script{% if promise_test %} type="module"{% endif %}>
-  const canvas = new OffscreenCanvas({{ width }}, {{ height }});
+<script{% if test_type == 'promise' %} type="module"{% endif %}>
+  const canvas = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
   const ctx = canvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %});
 
   {{ code | trim | indent(2) }}
 
   const outputCanvas = document.getElementById("canvas");
   outputCanvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %}).drawImage(canvas, 0, 0);
-  {% if promise_test %}
+  {% if test_type == 'promise' %}
   document.documentElement.classList.remove("reftest-wait");
   {% endif %}
 </script>
-{{ images -}}
-{% if promise_test %}</html>{% endif %}
+{% if test_type == 'promise' %}</html>{% endif %}
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_worker.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_worker.html
index 7ce9ca5b159..e636d3634ba 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_worker.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/reftest_worker.html
@@ -1,8 +1,7 @@
 <!DOCTYPE html>
 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
 <html class="reftest-wait">
-{% if ref_link %}<link rel="match" href="{{ ref_link }}">
-{% endif %}
+<link rel="match" href="{{ name }}-expected.html">
 {% if fuzzy %}<meta name=fuzzy content="{{ fuzzy }}">
 {% endif %}
 {% if timeout %}<meta name="timeout" content="{{ timeout }}">
@@ -11,12 +10,12 @@
 <h1>{{ name }}</h1>
 <p class="desc">{{ desc }}</p>
 {% if notes %}<p class="notes">{{ notes }}{% endif %}
-<canvas id="canvas" width="{{ width }}" height="{{ height }}"{{ canvas }}>
+<canvas id="canvas" width="{{ size[0] }}" height="{{ size[1] }}"{{ canvas }}>
   <p class="fallback">FAIL (fallback content)</p>
 </canvas>
 <script id='myWorker' type='text/worker'>
-  self.onmessage = {% if promise_test %}async {% endif %}function(e) {
-    const canvas = new OffscreenCanvas({{ width }}, {{ height }});
+  self.onmessage = {% if test_type == 'promise' %}async {% endif %}function(e) {
+    const canvas = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
     const ctx = canvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %});
 
     {{ code | trim | indent(4) }}
@@ -35,5 +34,4 @@
   });
   worker.postMessage(null);
 </script>
-{{ images -}}
 </html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_element.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_element.html
index 521fece50c4..b6bda2835e2 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_element.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_element.html
@@ -15,14 +15,16 @@
 
 {% endif %}
 <p class="output">Actual output:</p>
-<canvas id="c" class="output" width="{{ width }}" height="{{ height }}"
+<canvas id="c" class="output" width="{{ size[0] }}" height="{{ size[1] }}"
   {{- canvas}}><p class="fallback">FAIL (fallback content)</p></canvas>
-{{ expected }}
+{% if expected_img %}
+<p class="output expectedtext">Expected output:<p><img src="{{ expected_img }}" class="output expected" id="expected" alt="">
+{%- endif +%}
 <ul id="d"></ul>
 <script>
 
 {#- Promise vs. async test header: +#}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 promise_test(async t => {
 
   var canvas = document.getElementById('c');
@@ -36,11 +38,16 @@ _addTest(function(canvas, ctx) {
   {{ code | trim | indent(2) }}
 
 {# Promise vs. async test footer: #}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 }, "{{ desc }}");
 {% else %}
 }{% if attributes %}, {{ attributes }}{% endif %});
 {% endif -%}
 
 </script>
-{{ images }}
+{% for image in images %}
+<img src="/images/{{ image }}" id="{{ image }}" class="resource">
+{% endfor -%}
+{% for svgimage in svgimages %}
+<svg><image xlink:href="/images/{{ svgimage }}" id="{{ svgimage }}" class="resource"></svg>
+{% endfor +%}
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_offscreen.html b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_offscreen.html
index a6de83c4195..8ebbff77a6c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_offscreen.html
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_offscreen.html
@@ -13,7 +13,7 @@
 <script>
 
 {#- Promise vs. async test header: +#}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 promise_test(async t => {
 {% else %}
 var t = async_test("{{ desc | double_quote_escape }}");
@@ -25,13 +25,13 @@ t.step(function() {
 {% endif %}
 
 {# Test body: #}
-  var canvas = new OffscreenCanvas({{ width }}, {{ height }});
+  var canvas = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
   var ctx = canvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %});
 
   {{ code | trim | indent(2)}}
 
 {#- Promise vs. async test footer: +#}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 
 }, "{{ desc }}");
 {% else %}
@@ -40,3 +40,6 @@ t.step(function() {
 });
 {% endif %}
 </script>
+{% for svgimage in svgimages %}
+<svg><image xlink:href="/images/{{ svgimage }}" id="{{ svgimage }}" class="resource"></svg>
+{% endfor %}
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_worker.js b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_worker.js
index b6575b95a67..f1f04e7bb6b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/templates/testharness_worker.js
@@ -8,7 +8,7 @@ importScripts("/resources/testharness.js");
 importScripts("/html/canvas/resources/canvas-tests.js");
 
 {# Promise vs. async test header: #}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 promise_test(async t => {
 {% else %}
 var t = async_test("{{ desc | double_quote_escape }}");
@@ -20,14 +20,14 @@ t.step(function() {
 {% endif %}
 
 {# Test body: #}
-  var canvas = new OffscreenCanvas({{ width }}, {{ height }});
+  var canvas = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
   var ctx = canvas.getContext('2d'{% if attributes %}, {{ attributes }}{% endif %});
 
   {{ code | trim | indent(2)}}
   t.done();
 
 {#- Promise vs. async test footer: +#}
-{% if promise_test %}
+{% if test_type == 'promise' %}
 }, "{{ desc }}");
 {% else %}
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
index 91b92b0092f..93c556288d7 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
@@ -187,19 +187,6 @@
     }), 500);
   expected: green
 
-- name: 2d.drawImage.animated.apng
-  desc: drawImage() of an APNG with no poster frame draws the first frame
-  canvasType: ['HTMLCanvas']
-  images:
-  - anim-gr.png
-  code: |
-    deferTest();
-    step_timeout(t.step_func_done(function () {
-        ctx.drawImage(document.getElementById('anim-gr.png'), 0, 0);
-        @assert pixel 50,25 ==~ 0,255,0,255;
-    }), 500);
-  expected: green
-
 # TODO: drawImage shadows
 
 - name: 2d.drawImage.3arg
@@ -398,7 +385,7 @@
 - name: 2d.drawImage.zerosource.image
   desc: drawImage with zero-sized source rectangle from image draws nothing without exception
   test_type: promise
-  canvasType: ['HTMLCanvas']
+  canvasType: ['HTMLCanvas', 'OffscreenCanvas']
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
@@ -421,19 +408,6 @@
     _assertPixel(canvas, 50, 25, 0, 255, 0, 255);
   expected: green
 
-- name: 2d.drawImage.zerosource.image
-  desc: drawImage with zero-sized source rectangle from image draws nothing without exception
-  test_type: promise
-  canvasType: ['OffscreenCanvas', 'Worker']
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    const response = await fetch('/images/red-zerowidth.svg');
-    const blob = await response.blob();
-    const bitmap = await createImageBitmap(blob);
-    ctx.drawImage(bitmap, 0, 0, 100, 50);
-    _assertPixel(canvas, 50,25, 0,255,0,255);
-  expected: green
 
 - name: 2d.drawImage.negativesource
   desc: Negative source width/height represents the correct rectangle
@@ -544,7 +518,7 @@
 - name: 2d.drawImage.svg
   desc: drawImage() of an SVG image
   test_type: promise
-  canvasType: ['HTMLCanvas']
+  canvasType: ['HTMLCanvas', 'OffscreenCanvas']
   code: |
     const img = new Image();
     const imageLoadPromise = new Promise((resolve, reject) => {
@@ -558,31 +532,6 @@
     _assertPixelApprox(canvas, 50, 25, 0, 255, 0, 255, 2);
   expected: green
 
-
-- name: 2d.drawImage.svg
-  desc: drawImage() of an SVG image
-  test_type: promise
-  canvasType: ['OffscreenCanvas', 'Worker']
-  code: |
-    const response = await fetch('/images/green.svg');
-    const blob = await response.blob();
-    const bitmap = await createImageBitmap(blob);
-    ctx.drawImage(bitmap, 0, 0);
-    _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-  expected: green
-
-- name: 2d.drawImage.animated.poster
-  desc: drawImage() of an APNG draws the poster frame
-  test_type: promise
-  code: |
-    const response = await fetch('/images/anim-poster-gr.png');
-    const blob = await response.blob();
-    const bitmap = await createImageBitmap(blob);
-
-    ctx.drawImage(bitmap, 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255; @moz-todo
-  expected: green
-
 - name: 2d.drawImage.path
   test_type: promise
   code: |
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
index 9a90bed2482..a5c2b9864b6 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
@@ -349,13 +349,13 @@
 
 - name: 2d.filter.canvasFilterObject.dropShadow.tentative
   desc: Test CanvasFilter() dropShadow object.
-  size: 520, 420
+  size: [520, 420]
   code: |
     ctx.fillStyle = 'teal';
-    ctx.fillRect(0, 0, 520, 50);
-    ctx.fillRect(0, 100, 520, 50);
-    ctx.fillRect(0, 200, 520, 50);
-    ctx.fillRect(0, 300, 520, 50);
+    ctx.fillRect(0, 0, {{ size[0] }}, 50);
+    ctx.fillRect(0, 100, {{ size[0] }}, 50);
+    ctx.fillRect(0, 200, {{ size[0] }}, 50);
+    ctx.fillRect(0, 300, {{ size[0] }}, 50);
 
     ctx.fillStyle = 'crimson';
 
@@ -446,7 +446,7 @@
     ctx.fillRect(210, 310, 80, 80);
   html_reference: |
     <svg xmlns="http://www.w3.org/2000/svg"
-         width=520 height=420
+         width={{ size[0] }} height={{ size[1] }}
          color-interpolation-filters="sRGB">
       <rect x=0 y=0 width=100% height=50 fill="teal" />
       <rect x=0 y=100 width=100% height=50 fill="teal" />
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
index e0d2b3d793b..8ca05bec84d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
@@ -1,6 +1,6 @@
 - name: 2d.layer.global-states
   desc: Checks that layers correctly use global render states.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'rgba(0, 0, 255, 1)';
 
@@ -8,7 +8,7 @@
     circle.arc(90, 90, 45, 0, 2 * Math.PI);
     ctx.fill(circle);
 
-    %(render-states)s
+    {{ render_states }}
 
     ctx.beginLayer();
 
@@ -29,7 +29,7 @@
     circle.arc(90, 90, 45, 0, 2 * Math.PI);
     ctx.fill(circle);
 
-    %(render-states)s
+    {{ render_states }}
 
     canvas2 = document.createElement("canvas");
     ctx2 = canvas2.getContext("2d");
@@ -43,54 +43,54 @@
     ctx.drawImage(canvas2, 0, 0);
   variants: &global-state-variants
     no-global-states:
-      render-states: // No global states.
+      render_states: // No global states.
     alpha:
-      render-states: ctx.globalAlpha = 0.6;
+      render_states: ctx.globalAlpha = 0.6;
     blending:
-      render-states: ctx.globalCompositeOperation = 'multiply';
+      render_states: ctx.globalCompositeOperation = 'multiply';
     composite:
-      render-states: ctx.globalCompositeOperation = 'source-in';
+      render_states: ctx.globalCompositeOperation = 'source-in';
     shadow:
-      render-states: |-
+      render_states: |-
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
     alpha.blending:
-      render-states: |-
+      render_states: |-
         ctx.globalAlpha = 0.6;
         ctx.globalCompositeOperation = 'multiply';
     alpha.composite:
-      render-states: |-
+      render_states: |-
         ctx.globalAlpha = 0.6;
         ctx.globalCompositeOperation = 'source-in';
     alpha.shadow:
-      render-states: |-
+      render_states: |-
         ctx.globalAlpha = 0.5;
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
     alpha.blending.shadow:
-      render-states: |-
+      render_states: |-
         ctx.globalAlpha = 0.6;
         ctx.globalCompositeOperation = 'multiply';
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
     alpha.composite.shadow:
-      render-states: |-
+      render_states: |-
         ctx.globalAlpha = 0.6;
         ctx.globalCompositeOperation = 'source-in';
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
     blending.shadow:
-      render-states: |-
+      render_states: |-
         ctx.globalCompositeOperation = 'multiply';
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
     composite.shadow:
-      render-states: |-
+      render_states: |-
         ctx.globalCompositeOperation = 'source-in';
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
@@ -99,7 +99,7 @@
 
 - name: 2d.layer.global-states.filter
   desc: Checks that layers with filters correctly use global render states.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'rgba(0, 0, 255, 1)';
 
@@ -107,7 +107,7 @@
     circle.arc(90, 90, 45, 0, 2 * Math.PI);
     ctx.fill(circle);
 
-    %(render-states)s
+    {{ render_states }}
 
     ctx.beginLayer([
         {filter: 'colorMatrix', values: [0.393, 0.769, 0.189, 0, 0,
@@ -127,9 +127,9 @@
   reference: |
     const svg = `
       <svg xmlns="http://www.w3.org/2000/svg"
-            width="200" height="200"
+            width="{{ size[0] }}" height="{{ size[1] }}"
             color-interpolation-filters="sRGB">
-        <filter id="filter" x="-100%%" y="-100%%" width="300%%" height="300%%">
+        <filter id="filter" x="-100%" y="-100%" width="300%" height="300%">
           <feColorMatrix
               type="matrix"
               values="0.393 0.769 0.189 0 0
@@ -148,8 +148,8 @@
       </svg>`;
 
     const img = new Image();
-    img.width = 200;
-    img.height = 200;
+    img.width = {{ size[0] }};
+    img.height = {{ size[1] }};
     img.onload = () => {
       ctx.fillStyle = 'rgba(0, 0, 255, 1)';
 
@@ -157,7 +157,7 @@
       circle.arc(90, 90, 45, 0, 2 * Math.PI);
       ctx.fill(circle);
 
-      %(render-states)s
+      {{ render_states }}
 
       ctx.drawImage(img, 0, 0);
     };
@@ -167,7 +167,7 @@
 
 - name: 2d.layer.nested
   desc: Tests nested canvas layers.
-  size: 200, 200
+  size: [200, 200]
   code: |
     var circle = new Path2D();
     circle.arc(90, 90, 40, 0, 2 * Math.PI);
@@ -220,7 +220,7 @@
 
 - name: 2d.layer.restore-style
   desc: Test that ensure layers restores style values upon endLayer.
-  size: 200, 200
+  size: [200, 200]
   fuzzy: maxDifference=0-1; totalPixels=0-950
   code: |
     ctx.fillStyle = 'rgba(0,0,255,1)';
@@ -249,7 +249,7 @@
 
 - name: 2d.layer.unclosed
   desc: Check that layers are rendered even if not closed.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'purple';
     ctx.fillRect(60, 60, 75, 50);
@@ -274,7 +274,7 @@
 
 - name: 2d.layer.render-opportunities
   desc: Check that layers state stack is flushed and rebuilt on frame renders.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'purple';
     ctx.fillRect(60, 60, 75, 50);
@@ -286,7 +286,7 @@
     ctx.fillRect(50, 50, 75, 50);
 
     // Force a flush and restoration of the state stack:
-    %(flush_canvas)s
+    {{ flush_canvas }}
 
     ctx.fillRect(70, 70, 75, 50);
     ctx.fillStyle = 'orange';
@@ -324,11 +324,11 @@
       flush_canvas: createImageBitmap(canvas);
     drawImage:
       flush_canvas: |-
-        const canvas2 = new OffscreenCanvas(200, 200);
+        const canvas2 = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
         const ctx2 = canvas2.getContext('2d');
         ctx2.drawImage(canvas, 0, 0);
     getImageData:
-      flush_canvas: ctx.getImageData(0, 0, 200, 200);
+      flush_canvas: ctx.getImageData(0, 0, {{ size[0] }}, {{ size[1] }});
     requestAnimationFrame:
       canvasType: ['HTMLCanvas']
       test_type: "promise"
@@ -336,7 +336,7 @@
         await new Promise(resolve => requestAnimationFrame(resolve));
     putImageData:
       flush_canvas: |-
-        const canvas2 = new OffscreenCanvas(200, 200);
+        const canvas2 = new OffscreenCanvas({{ size[0] }}, {{ size[1] }});
         const ctx2 = canvas2.getContext('2d');
         ctx.putImageData(ctx2.getImageData(0, 0, 1, 1), 0, 0);
     toBlob:
@@ -351,7 +351,7 @@
 
 - name: 2d.layer.render-opportunities.transferToImageBitmap
   desc: Checks that transferToImageBitmap flushes and rebuilds the state stack.
-  size: 200, 200
+  size: [200, 200]
   canvasType: ['OffscreenCanvas', 'Worker']
   code: |
     ctx.fillStyle = 'purple';
@@ -391,7 +391,7 @@
   desc: >-
     Test to ensure beginlayer works for filter, alpha and shadow, even with
     consecutive layers.
-  size: 500, 500
+  size: [500, 500]
   fuzzy: maxDifference=0-3; totalPixels=0-6318
   code: |
     ctx.fillStyle = 'rgba(0, 0, 255, 1)';
@@ -441,7 +441,7 @@
   desc: >-
     A test to make sure an unmatched endLayer is a no-op and has no effect on
     the code following it.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'rgba(0, 0, 255, 1)';
     ctx.fillRect(60, 60, 75, 50);
@@ -473,7 +473,7 @@
 
 - name: 2d.layer.endlayer.alone
   desc: A test to make sure a single endLayer with no beginLayer is a no-op.
-  size: 200, 200
+  size: [200, 200]
   code: |
     ctx.fillStyle = 'rgba(0, 0, 255, 1)';
     ctx.fillRect(60, 60, 75, 50);
diff --git a/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/resources/iframe-test.js b/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/resources/iframe-test.js
index f788cbd1ebd..f13e7686902 100644
--- a/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/resources/iframe-test.js
+++ b/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/resources/iframe-test.js
@@ -86,6 +86,13 @@ function popupOpeningScript(popup_via, popup_url, popup_origin, headers,
   assert_not_reached('Unrecognized popup opening method.');
 }
 
+function promise_test_parallel(promise, description) {
+  async_test(test => {
+    promise(test)
+        .then(() => test.done())
+        .catch(test.step_func(error => { throw error; }));
+  }, description);
+};
 
 // Verifies that a popup with origin `popup_origin` and headers `headers` has
 // the expected `opener_state` after being opened from an iframe with origin
@@ -93,7 +100,7 @@ function popupOpeningScript(popup_via, popup_url, popup_origin, headers,
 function iframe_test(description, iframe_origin, popup_origin, headers,
     expected_opener_state) {
   for (const popup_via of ['window_open', 'anchor','form']) {
-    promise_test(async t => {
+    promise_test_parallel(async t => {
       const iframe_token = token();
       const popup_token = token();
       const reply_token = token();
diff --git a/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/tentative/restrict-properties/iframe-popup-to-so.https.html b/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/tentative/restrict-properties/iframe-popup-to-so.https.html
index 740ff2595aa..8cf2679e190 100644
--- a/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/tentative/restrict-properties/iframe-popup-to-so.https.html
+++ b/tests/wpt/web-platform-tests/html/cross-origin-opener-policy/tentative/restrict-properties/iframe-popup-to-so.https.html
@@ -1,10 +1,14 @@
 <!doctype html>
 <meta charset=utf-8>
 <meta name=timeout content=long>
-<meta name="variant" content="?1-2">
-<meta name="variant" content="?3-4">
-<meta name="variant" content="?5-6">
-<meta name="variant" content="?7-8">
+<meta name="variant" content="?1-1">
+<meta name="variant" content="?2-2">
+<meta name="variant" content="?3-3">
+<meta name="variant" content="?4-4">
+<meta name="variant" content="?5-5">
+<meta name="variant" content="?6-6">
+<meta name="variant" content="?7-7">
+<meta name="variant" content="?8-8">
 <meta name="variant" content="?9-last">
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
diff --git a/tests/wpt/web-platform-tests/html/rendering/dimension-attributes.html b/tests/wpt/web-platform-tests/html/rendering/dimension-attributes.html
index f3dc8f81718..1d94205e0b1 100644
--- a/tests/wpt/web-platform-tests/html/rendering/dimension-attributes.html
+++ b/tests/wpt/web-platform-tests/html/rendering/dimension-attributes.html
@@ -137,17 +137,10 @@ const tests = [
   [ newElem("img"), "height", "height", true ],
   [ newElem("td"), "width", "width", false ],
   [ newElem("td"), "height", "height", false ],
-  // https://github.com/whatwg/html/issues/4715 tracks the fact that for
-  // <table width> and <table height> the "0 is valid" boolean should probably
-  // be true.
   [ newElem("table"), "width", "width", false ],
-  [ newElem("table"), "height", "height", false ],
-  // https://github.com/whatwg/html/issues/4716 tracks the fact that for the
-  // <tr height> case that "0 is valid" boolean should probably be true.
-  [ newElem("tr"), "height", "height", false ],
-  // https://github.com/whatwg/html/issues/4717 tracks the fact that for the
-  // <col width> case that "0 is valid" boolean should probably be true.
-  [ newElem("col"), "width", "width", false ],
+  [ newElem("table"), "height", "height", true ],
+  [ newElem("tr"), "height", "height", true ],
+  [ newElem("col"), "width", "width", true ],
   [ newElem("embed"), "hspace", "marginLeft", true ],
   [ newElem("embed"), "hspace", "marginRight", true ],
   [ newElem("embed"), "vspace", "marginTop", true ],
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations-lazy.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations-lazy.html
new file mode 100644
index 00000000000..d3784671b86
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations-lazy.html
@@ -0,0 +1,78 @@
+<!doctype html>
+<title>img relevant mutations, lazy-loaded</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/relevant-mutations.js"></script>
+<div id=log></div>
+
+<img src="/images/green-2x2.png"> <!-- block the window load event -->
+
+<!-- should invoke update the image data, but omit events for layout changes -->
+<!-- but also see https://github.com/whatwg/html/issues/8492 -->
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" width="2" loading="lazy" data-desc="width attribute changes">
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 2px" loading="lazy" data-desc="width property changes">
+
+<div style="width: 2px">
+  <img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 100%" loading="lazy" data-desc="percentage width, CB width changes">
+</div>
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="height: 2px; aspect-ratio: 2 / 2" loading="lazy" data-desc="height property changes (with aspect-ratio)">
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 2px" loading="lazy" data-desc="being rendered changes">
+
+<!-- should not invoke update the image data -->
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 2px" loading="lazy" data-desc="loading attribute state changes">
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 2px" loading="lazy" data-desc="display property changes to inline-block">
+
+<img srcset="/images/green-2x2.png 2w" sizes="auto" style="width: 2px" loading="lazy" data-desc="loading attribute changes to LAZY">
+
+<script>
+const rAF = () => new Promise(resolve => requestAnimationFrame(resolve));
+
+onload = async function() {
+
+  await rAF();
+  await rAF();
+
+  // lazy-loaded images should have fired their first 'load' event at this point.
+
+  t('width attribute changes', function(img) {
+    img.width = '4';
+  }, 'load');
+
+  t('width property changes', function(img) {
+    img.style.width = '4px';
+  }, 'timeout');
+
+  t('percentage width, CB width changes', function(img) {
+    img.parentNode.style.width = '4px';
+  }, 'timeout');
+
+  t('height property changes (with aspect-ratio)', function(img) {
+    img.style.height = '4px';
+  }, 'timeout');
+
+  t('loading attribute state changes', function(img) {
+    img.loading = 'eager';
+  }, 'timeout');
+
+  t('being rendered changes', function(img) {
+    img.style.display = 'none';
+  }, 'timeout');
+
+  t('display property changes to inline-block', function(img) {
+    img.style.display = 'inline-block';
+  }, 'timeout');
+
+  t('loading attribute changes to LAZY', function(img) {
+    img.setAttribute('loading', 'LAZY');
+  }, 'timeout');
+
+  done();
+};
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
index 2f1031bf832..24e15543cd8 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/relevant-mutations.html
@@ -3,6 +3,7 @@
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="support/relevant-mutations.js"></script>
 <div id=log></div>
 
 <!-- should invoke update the image data -->
@@ -152,22 +153,6 @@
 
 
 <script>
-setup({explicit_done:true});
-
-function t(desc, func, expect) {
-  async_test(function() {
-    var img = document.querySelector('[data-desc="' + desc + '"]');
-    img.onload = img.onerror = this.unreached_func('update the image data was run');
-    if (expect == 'timeout') {
-      setTimeout(this.step_func_done(), 1000);
-    } else {
-      img['on' + expect] = this.step_func_done();
-      setTimeout(this.unreached_func('update the image data didn\'t run'), 1000);
-    }
-    func.call(this, img);
-  }, desc);
-}
-
 onload = function() {
 
   t('src set', function(img) {
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html
new file mode 100644
index 00000000000..41385edd33f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/sizes-auto.html
@@ -0,0 +1,147 @@
+<!doctype html>
+<title>img parse a sizes attribute: sizes=auto</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+img { height: 10px; } /* Keep all images in the viewport, so lazy images load */
+#narrow-div { width: 10px; }
+#wide-div { width: 500px; }
+</style>
+<div id=log></div>
+<script src="support/parse-a-sizes-attribute.js"></script>
+<img srcset='/images/green-1x1.png?ref1 50w, /images/green-16x16.png?ref1 51w' sizes='1px' id=ref1>
+<img srcset='/images/green-1x1.png?ref2 50w, /images/green-16x16.png?ref2 51w' sizes='100vw' id=ref2>
+<div id='narrow-div'></div>
+<div id='wide-div'></div>
+<script>
+"use strict";
+
+// https://github.com/web-platform-tests/rfcs/pull/75
+let async_promise_test = (promise, description) => {
+  async_test(test => {
+    promise(test)
+      .then(() => {test.done();})
+      .catch(test.step_func(error => { throw error; }));
+  }, description);
+};
+
+function check(imgOrPicture) {
+  let img = imgOrPicture;
+  let source;
+  if (imgOrPicture.localName === 'picture') {
+    source = imgOrPicture.firstChild;
+    img = imgOrPicture.lastChild;
+  }
+  const ref = document.getElementById(img.dataset.ref);
+  async_promise_test(async (t) => {
+    let expect = ref.currentSrc;
+    if (expect) {
+      expect = expect.split('?')[0];
+    }
+    if (expect === '' || expect === null || expect === undefined) {
+      assert_unreached('ref currentSrc was ' + format_value(expect));
+    }
+    await new Promise((resolve, reject) => {
+      img.onload = resolve;
+      img.onerror = reject;
+    });
+    t.step(() => {
+      let got = img.currentSrc;
+      assert_greater_than(got.indexOf('?'), -1, 'expected a "?" in currentSrc');
+      got = got.split('?')[0];
+      assert_equals(got, expect);
+    })
+  }, imgOrPicture.outerHTML);
+}
+
+const tests = [
+  // Smoke tests
+  {sizes: '1px', 'data-ref': 'ref1'},
+  {sizes: '', 'data-ref': 'ref2'},
+  // Actual tests
+  {loading: 'lazy', sizes: 'auto', width: '10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'AUTO', width: '10', 'data-ref': 'ref1'},
+  {loading: 'lazy', width: '10', 'data-ref': 'ref1'},
+  {loading: 'lazy', style: 'width: 10px', 'data-ref': 'ref1'},
+  {loading: 'lazy', style: 'max-width: 10px', 'data-ref': 'ref2'}, // no specified width -> 0 -> 100vw
+  {loading: 'lazy', style: 'width: 100%; max-width: 10px', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', width: '500', 'data-ref': 'ref2'},
+  {loading: 'lazy', sizes: 'auto', width: '10', style: 'visibility: hidden', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', width: '10', style: 'display: inline', hidden: '', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', width: '0', 'data-ref': 'ref2'}, // 0 -> 100vw
+  {loading: 'lazy', sizes: 'auto', style: 'width: 0px', 'data-ref': 'ref2'}, // 0 -> 100vw
+  {loading: 'lazy', sizes: 'auto', 'data-ref': 'ref2'}, // no specified width -> 0 -> 100vw
+  {loading: 'lazy', sizes: 'auto, 100vw', width: '10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: '100vw, auto', width: '10', 'data-ref': 'ref2'},
+  {loading: 'eager', sizes: 'auto', width: '10', 'data-ref': 'ref2'},
+  {loading: 'lazy', sizes: 'auto', width: '100%', parent: 'narrow-div', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', width: '100%', parent: 'wide-div', 'data-ref': 'ref2'},
+  {loading: 'lazy', sizes: 'auto', style: 'height: 10px; aspect-ratio: 10 / 10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'height: 10px; aspect-ratio: 500 / 10', 'data-ref': 'ref2'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-height: 10px; aspect-ratio: 10 / 10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-height: 10px; aspect-ratio: 500 / 10', 'data-ref': 'ref2'},
+  {loading: 'lazy', sizes: 'auto', style: 'inline-size: 10px', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-inline-size: 10px', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'block-size: 10px; aspect-ratio: 10 / 10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-block-size: 10px; aspect-ratio: 10 / 10', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'block-size: 10px; writing-mode: vertical-rl', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-block-size: 10px; writing-mode: vertical-rl', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'min-inline-size: 10px; aspect-ratio: 10/10; writing-mode: vertical-rl', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: '--my-width: 10px; width: var(--my-width)', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'width: calc(5px + 5px)', 'data-ref': 'ref1'},
+  {loading: 'lazy', sizes: 'auto', style: 'position: absolute; left: 50%; right: 49%', 'data-ref': 'ref2'}, // replaced elements don't get the width resolved from 'left'/'right' per https://drafts.csswg.org/css2/#abs-replaced-width
+];
+
+function test_img(obj, i) {
+  const img = document.createElement('img');
+  let parent = document.body;
+  for (const attr in obj) {
+    if (attr === 'parent') {
+      parent = document.getElementById(obj.parent);
+    } else {
+      img.setAttribute(attr, obj[attr]);
+    }
+  }
+  img.srcset = `/images/green-1x1.png?img${i} 50w, /images/green-16x16.png?img${i} 51w`
+  parent.appendChild(img);
+  check(img);
+}
+
+function test_picture(obj, i) {
+  const picture = document.createElement('picture');
+  const source = document.createElement('source');
+  const img = document.createElement('img');
+  let parent = document.body;
+  for (const attr in obj) {
+    switch (attr) {
+      case 'parent':
+        parent = document.getElementById(obj.parent);
+        break;
+      case 'sizes':
+      case 'type':
+      case 'media':
+        source.setAttribute(attr, obj[attr]);
+        break;
+      default:
+        img.setAttribute(attr, obj[attr]);
+        break;
+    }
+  }
+  source.srcset = `/images/green-1x1.png?picture${i} 50w, /images/green-16x16.png?picture${i} 51w`;
+  picture.appendChild(source);
+  picture.appendChild(img);
+  parent.appendChild(picture);
+  check(picture);
+}
+
+onload = () => {
+  let i = 0;
+  for (const obj of tests) {
+    i++;
+    test_img(obj, i);
+    test_picture(obj, i);
+  }
+  done();
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
index 7602dd8fce1..1f80ad2f917 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/sizes/support/sizes-iframed.sub.html
@@ -159,7 +159,6 @@
 <img srcset='/images/green-1x1.png?f19 50w, /images/green-16x16.png?f19 51w' data-foo='1' sizes='attr(data-foo, px, 1px)'>
 <img srcset='/images/green-1x1.png?f20 50w, /images/green-16x16.png?f20 51w' sizes='toggle(1px)'>
 <img srcset='/images/green-1x1.png?f21 50w, /images/green-16x16.png?f21 51w' sizes='inherit'>
-<img srcset='/images/green-1x1.png?f22 50w, /images/green-16x16.png?f22 51w' sizes='auto'>
 <img srcset='/images/green-1x1.png?f23 50w, /images/green-16x16.png?f23 51w' sizes='initial'>
 <img srcset='/images/green-1x1.png?f24 50w, /images/green-16x16.png?f24 51w' sizes='unset'>
 <img srcset='/images/green-1x1.png?f25 50w, /images/green-16x16.png?f25 51w' sizes='default'>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/support/relevant-mutations.js b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/support/relevant-mutations.js
new file mode 100644
index 00000000000..7105b037084
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/support/relevant-mutations.js
@@ -0,0 +1,15 @@
+setup({explicit_done:true});
+
+function t(desc, func, expect) {
+  async_test(function() {
+    var img = document.querySelector('[data-desc="' + desc + '"]');
+    img.onload = img.onerror = this.unreached_func('update the image data was run');
+    if (expect == 'timeout') {
+      setTimeout(this.step_func_done(), 1000);
+    } else {
+      img['on' + expect] = this.step_func_done();
+      setTimeout(this.unreached_func('update the image data didn\'t run'), 1000);
+    }
+    func.call(this, img);
+  }, desc);
+}
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-focus.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-focus.html
index 98bb065de7b..230492022c0 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-focus.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-focus.html
@@ -112,6 +112,19 @@
       assert_equals(document.activeElement, priorFocus, 'prior element should get focus on hide, or if focus didn\'t shift on show, focus should stay where it was');
       assert_false(isElementVisible(popover));
 
+      // Manual popover does not restore focus
+      popover.popover = 'manual';
+      priorFocus.focus();
+      assert_equals(document.activeElement, priorFocus);
+      popover.showPopover();
+      assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
+      popover.hidePopover();
+      if (!popover.hasAttribute('data-no-focus')) {
+        assert_not_equals(document.activeElement, priorFocus, 'prior element should *not* get focus when the popover is manual');
+      }
+      assert_false(isElementVisible(popover));
+      popover.popover = 'auto';
+
       // Hit Escape:
       priorFocus.focus();
       assert_equals(document.activeElement, priorFocus);
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-light-dismiss.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-light-dismiss.html
index 59a12a2c9ac..0f206f1c700 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-light-dismiss.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-light-dismiss.html
@@ -587,3 +587,30 @@ promise_test(async () => {
   p20.hidePopover(); // Cleanup
 },'Show an unrelated popover during "hide popover"');
 </script>
+
+<div id=p21 popover>21
+  <div id=p22 popover>22</div>
+  <div id=p23 popover>23</div>
+  <div id=p24 popover>24</div>
+</div>
+
+<script>
+promise_test(async () => {
+  p21.showPopover();
+  p22.showPopover();
+  let events = [];
+  const logEvents = (e) => { events.push(`${e.newState === 'open' ? 'show' : 'hide'} ${e.target.id}`) };
+  p22.addEventListener('beforetoggle', (e) => {
+    logEvents(e);
+    p24.showPopover()
+  });
+  p23.addEventListener('beforetoggle', logEvents);
+  p24.addEventListener('beforetoggle', logEvents);
+  p23.showPopover();
+  assert_array_equals(events, ['show p23', 'hide p22', 'show p24'], 'hiding p24 does not fire event');
+  assert_false(p22.matches(':popover-open'));
+  assert_true(p23.matches(':popover-open'));
+  assert_false(p24.matches(':popover-open'));
+  p21.hidePopover(); // Cleanup
+},'Show other auto popover during "hide all popover until"');
+</script>
diff --git a/tests/wpt/web-platform-tests/images/anim-poster-gr.png b/tests/wpt/web-platform-tests/images/anim-poster-gr.png
deleted file mode 100644
index 6941207373e513cfe10729077f59d369c59e6046..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 422
zcmeAS@N?(olHy`uVBq!ia0vp^DL`z*!3HE(nbz$CQXGlNAwEEw5r`SK=)PP4q^5hi
zIEGZrd3(-~7pUNX!JpY})m+CmUU5h_TmPbQf*i-ofglbrvgo|lo-AlR1?WVnG>Ef-
zOo*RA3^4e`{DP6ux<lO+$eWOs;ur#?8G)X;xR95@K;X!R+x0KsOYj;P^iR24R`RBt
op>2tzP_jplqG8(+30gDwD-XWbzP|J1G>}U@UHx3vIVCg!0B<*q;s5{u

diff --git a/tests/wpt/web-platform-tests/interfaces/turtledove.idl b/tests/wpt/web-platform-tests/interfaces/turtledove.idl
index 8add667b575..f5867e995a8 100644
--- a/tests/wpt/web-platform-tests/interfaces/turtledove.idl
+++ b/tests/wpt/web-platform-tests/interfaces/turtledove.idl
@@ -95,6 +95,7 @@ interface InterestGroupScoringScriptRunnerGlobalScope
 interface InterestGroupReportingScriptRunnerGlobalScope
         : InterestGroupScriptRunnerGlobalScope {
   undefined sendReportTo(DOMString url);
+  undefined registerAdBeacon(record<DOMString, USVString> map);
 };
 
 dictionary AdRender {
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl b/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
index 59710bf46c2..6dd2ba3fffa 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
@@ -27,7 +27,7 @@ typedef [EnforceRange] unsigned long long SmallCryptoKeyID;
 typedef (SmallCryptoKeyID or bigint) CryptoKeyID;
 
 [Exposed=(Window,DedicatedWorker)]
-interface SFrameTransform {
+interface SFrameTransform : EventTarget {
     constructor(optional SFrameTransformOptions options = {});
     Promise<undefined> setEncryptionKey(CryptoKey key, optional CryptoKeyID keyID);
     attribute EventHandler onerror;
diff --git a/tests/wpt/web-platform-tests/payment-request/payment-request-disallowed-when-hidden.https.html b/tests/wpt/web-platform-tests/payment-request/payment-request-disallowed-when-hidden.https.html
new file mode 100644
index 00000000000..aa59cde2ef0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/payment-request/payment-request-disallowed-when-hidden.https.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test for PaymentRequest.show() method - should fail when tab is not visible</title>
+<link rel="help" href="https://w3c.github.io/payment-request/#show-method">
+<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>
+<!-- For minimize() -->
+<script src="/page-visibility/resources/window_state_context.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  const {minimize, restore} = window_state_context(t);
+
+  const request = new PaymentRequest([
+      {
+        supportedMethods: "https://apple.com/apple-pay",
+        data: {
+          version: 3,
+          merchantIdentifier: "merchant.com.example",
+          countryCode: "US",
+          merchantCapabilities: ["supports3DS"],
+          supportedNetworks: ["visa"],
+        },
+      },
+  ], {
+      total: {
+        label: "Total",
+        amount: {
+          currency: "USD",
+          value: "1.00",
+        },
+      }
+  });
+
+  // Before we trigger the Payment Request, minimize the window. This should
+  // cause the show() call to be rejected.
+  await minimize();
+  assert_equals(document.hidden, true);
+
+  await test_driver.bless('user activation');
+  return promise_rejects_dom(t, "AbortError", request.show());
+}, 'PaymentRequest.show() cannot be triggered from a hidden context');
+</script>
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html
new file mode 100644
index 00000000000..211ca7445df
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script>
+  test(function() {
+    var wildcard_origin = 'https://*:{{ports[https][0]}}';
+    assert_array_equals(
+      document.featurePolicy.getAllowlistForFeature('fullscreen'),
+      [wildcard_origin]);
+    assert_true(document.featurePolicy.allowsFeature('fullscreen'));
+  }, 'Test wildcard host policy works as expected');
+  </script>
+</body>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html.sub.headers b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html.sub.headers
new file mode 100644
index 00000000000..81d0de836ea
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-host-wildcard.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Permissions-Policy: fullscreen=("https://*:{{ports[https][0]}}")
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html
new file mode 100644
index 00000000000..adb657023ea
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script>
+  test(function() {
+    var wildcard_origin = 'https://{{domains[]}}:*';
+    assert_array_equals(
+      document.featurePolicy.getAllowlistForFeature('fullscreen'),
+      [wildcard_origin]);
+    assert_true(document.featurePolicy.allowsFeature('fullscreen'));
+  }, 'Test wildcard port policy works as expected');
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html.sub.headers b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html.sub.headers
new file mode 100644
index 00000000000..b813167ee62
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-port-wildcard.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Permissions-Policy: fullscreen=("https://{{domains[]}}:*")
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html
new file mode 100644
index 00000000000..eab3e8f697f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script>
+  test(function() {
+    var wildcard_origin = 'https:';
+    assert_array_equals(
+      document.featurePolicy.getAllowlistForFeature('fullscreen'),
+      [wildcard_origin]);
+    assert_true(document.featurePolicy.allowsFeature('fullscreen'));
+  }, 'Test scheme only policy works as expected');
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html.sub.headers b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html.sub.headers
new file mode 100644
index 00000000000..14d0868f2bb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/permissions-policy/experimental-features/permissions-policy-header-scheme-only.https.sub.html.sub.headers
@@ -0,0 +1 @@
+Permissions-Policy: fullscreen=("https:")
diff --git a/tests/wpt/web-platform-tests/permissions-policy/permissions-policy-header-policy-allowed-for-malformed-wildcard.https.sub.html.sub.headers b/tests/wpt/web-platform-tests/permissions-policy/permissions-policy-header-policy-allowed-for-malformed-wildcard.https.sub.html.sub.headers
index d9facde69e0..648e3ac75e6 100644
--- a/tests/wpt/web-platform-tests/permissions-policy/permissions-policy-header-policy-allowed-for-malformed-wildcard.https.sub.html.sub.headers
+++ b/tests/wpt/web-platform-tests/permissions-policy/permissions-policy-header-policy-allowed-for-malformed-wildcard.https.sub.html.sub.headers
@@ -1 +1 @@
-Permissions-Policy: fullscreen=("*://{{domains[]}}:{{ports[https][0]}}" "https://{{domains[]}}:*" "https://*.*.{{domains[]}}:{{ports[https][0]}}" "https://example.*.{{domains[]}}:{{ports[https][0]}}" "https://*.example.com" self)
+Permissions-Policy: fullscreen=("*://{{domains[]}}:{{ports[https][0]}}" "https://*.*.{{domains[]}}:{{ports[https][0]}}" "https://example.*.{{domains[]}}:{{ports[https][0]}}" "https://*.example.com" self)
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-ref.html b/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-ref.html
new file mode 100644
index 00000000000..ea3215e3590
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-ref.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/">
+<script src="/web-animations/testcommon.js"></script>
+<style>
+  .scroller {
+    height: 200px;
+    width: 500px;
+    overflow: auto;
+    position: absolute;
+    top: 100px;
+  }
+
+  .anim {
+    position: absolute;
+    width: 100px;
+    height: 100px;
+    background: darkred;
+    view-timeline: --view;
+  }
+  .spacer {
+    height: 1000px;
+  }
+
+  .before {
+    top: 450px;
+  }
+  .after {
+    top: 50px;
+  }
+  .indicator {
+    position: fixed;
+    top: 315px;
+  }
+
+  .after .indicator {
+    left: 200px;
+  }
+
+  .indicator > div {
+    display: inline-block;
+    width: 25px;
+    height: 25px;
+    position: relative;
+    border-radius: 100%;
+    box-sizing: border-box;
+    border: 2px solid black;
+    padding: 3px;
+    background: lightgray;
+    background-clip: content-box;
+  }
+
+  .indicator > div > div {
+    width: 100%;
+    height: 100%;
+    border-radius: 100%;
+    background: green;
+    opacity: 0;
+  }
+</style>
+</head>
+<body>
+  <p>Neither of the activity indicators should be active as both of the observed elements are out of view.</p>
+  <div class="scroller">
+    <div class="anim after"><div class="indicator">After phase: <div><div></div></div></div></div>
+    <div class="anim before"><div class="indicator">Before phase: <div><div></div></div></div></div>
+    <div class="spacer"></div>
+  </div>
+</body>
+<script>
+  let scroller = document.querySelector('.scroller');
+  scroller.scrollTo(0, 200);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-test.html b/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-test.html
new file mode 100644
index 00000000000..c0021a1fbc2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/animation-inactive-outside-range-test.html
@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/">
+<link rel="match" href="animation-inactive-outside-range-ref.html">
+<script src="/common/reftest-wait.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+<style>
+  .scroller {
+    height: 200px;
+    width: 500px;
+    overflow: auto;
+    position: absolute;
+    top: 100px;
+  }
+
+  .anim {
+    position: absolute;
+    width: 100px;
+    height: 100px;
+    background: darkred;
+    view-timeline: --view;
+  }
+  .spacer {
+    height: 1000px;
+  }
+
+  .before {
+    top: 450px;
+  }
+  .after {
+    top: 50px;
+  }
+  @keyframes active-opacity {
+    0% { opacity: 1; }
+    100% { opacity: 1; }
+  }
+  .indicator {
+    position: fixed;
+    top: 315px;
+  }
+
+  .after .indicator {
+    left: 200px;
+  }
+
+  .indicator > div {
+    display: inline-block;
+    width: 25px;
+    height: 25px;
+    position: relative;
+    border-radius: 100%;
+    box-sizing: border-box;
+    border: 2px solid black;
+    padding: 3px;
+    background: lightgray;
+    background-clip: content-box;
+  }
+
+  .indicator > div > div {
+    width: 100%;
+    height: 100%;
+    border-radius: 100%;
+    background: green;
+    opacity: 0;
+    animation: active-opacity;
+    animation-timeline: --view;
+  }
+</style>
+</head>
+<body>
+  <p>Neither of the activity indicators should be active as both of the observed elements are out of view.</p>
+  <div class="scroller">
+    <div class="anim after"><div class="indicator">After phase: <div><div></div></div></div></div>
+    <div class="anim before"><div class="indicator">Before phase: <div><div></div></div></div></div>
+    <div class="spacer"></div>
+  </div>
+</body>
+<script>
+  async function run() {
+    let scroller = document.querySelector('.scroller');
+    // Scroll such that each animation becomes active.
+    scroller.scrollTo(0, 0);
+    await waitForCompositorReady();
+    scroller.scrollTo(0, 400);
+    await waitForNextFrame();
+
+    // Then scroll between them so that we are before one and after the other.
+    scroller.scrollTo(0, 200);
+    await waitForNextFrame();
+    takeScreenshot();
+  }
+  run();
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-ignored.tentative.html b/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-ignored.tentative.html
index 4a6624caf43..b9efbb428bd 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-ignored.tentative.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-ignored.tentative.html
@@ -65,7 +65,7 @@
           element.setAttribute('id', 'element');
           container.append(element);
         });
-        func();
+        await func();
       } finally {
         while (container.firstChild)
           container.firstChild.remove();
@@ -73,63 +73,81 @@
     }, description);
   }
 
-  test_animation_timeline(() => {
+  test_animation_timeline(async () => {
+    let animation = element.getAnimations()[0];
     assert_equals(getComputedStyle(element).width, '120px');
     element.style = 'animation-timeline:--timeline2';
+    await animation.ready;
+
     assert_equals(getComputedStyle(element).width, '140px');
   }, 'Changing animation-timeline changes the timeline (sanity check)');
 
-  test_animation_timeline(() => {
+  test_animation_timeline(async () => {
+    let animation = element.getAnimations()[0];
     assert_equals(getComputedStyle(element).width, '120px');
 
     // Set a (non-CSS) ScrollTimeline on the CSSAnimation.
     let timeline4 = new ScrollTimeline({ source: scroller4 });
 
-    element.getAnimations()[0].timeline = timeline4;
+    animation.timeline = timeline4;
+    await animation.ready;
     assert_equals(getComputedStyle(element).width, '180px');
 
     // Changing the animation-timeline property should have no effect.
     element.style = 'animation-timeline:--timeline2';
+    await animation.ready;
+
     assert_equals(getComputedStyle(element).width, '180px');
   }, 'animation-timeline ignored after setting timeline with JS ' +
      '(ScrollTimeline from JS)');
 
-  test_animation_timeline(() => {
+  test_animation_timeline(async () => {
+    let animation = element.getAnimations()[0];
     assert_equals(getComputedStyle(element).width, '120px');
 
-    let animation = element.getAnimations()[0];
     let timeline1 = animation.timeline;
     element.style = 'animation-timeline:--timeline2';
+    await animation.ready;
     assert_equals(getComputedStyle(element).width, '140px');
 
     animation.timeline = timeline1;
+    await animation.ready;
+
     assert_equals(getComputedStyle(element).width, '120px');
 
     // Should have no effect.
     element.style = 'animation-timeline:--timeline3';
+    await animation.ready;
+
     assert_equals(getComputedStyle(element).width, '120px');
   }, 'animation-timeline ignored after setting timeline with JS ' +
      '(ScrollTimeline from CSS)');
 
-  test_animation_timeline(() => {
+  test_animation_timeline(async () => {
+    let animation = element.getAnimations()[0];
     assert_equals(getComputedStyle(element).width, '120px');
-    element.getAnimations()[0].timeline = document.timeline;
+    animation.timeline = document.timeline;
+    await animation.ready;
 
     // (The animation continues from where the previous timeline left it).
     assert_equals(getComputedStyle(element).width, '120px');
 
     // Changing the animation-timeline property should have no effect.
     element.style = 'animation-timeline:--timeline2';
+    await animation.ready;
     assert_equals(getComputedStyle(element).width, '120px');
   }, 'animation-timeline ignored after setting timeline with JS (document timeline)');
 
-  test_animation_timeline(() => {
+  test_animation_timeline(async () => {
+    let animation = element.getAnimations()[0];
     assert_equals(getComputedStyle(element).width, '120px');
-    element.getAnimations()[0].timeline = null;
+    animation.timeline = null;
+    assert_false(animation.pending);
     assert_equals(getComputedStyle(element).width, '120px');
 
     // Changing the animation-timeline property should have no effect.
     element.style = 'animation-timeline:--timeline2';
+    assert_false(animation.pending);
     assert_equals(getComputedStyle(element).width, '120px');
   }, 'animation-timeline ignored after setting timeline with JS (null)');
 </script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/intrinsic-iteration-duration.tentative.html b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/intrinsic-iteration-duration.tentative.html
new file mode 100644
index 00000000000..4bcea1adba3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/intrinsic-iteration-duration.tentative.html
@@ -0,0 +1,78 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Scroll based animation: AnimationEffect.getComputedTiming</title>
+<link rel="help" href="https://www.w3.org/TR/web-animations-2/#dom-animationeffect-getcomputedtiming">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+<script src="testcommon.js"></script>
+<style>
+  .scroller {
+    overflow: auto;
+    height: 100px;
+    width: 100px;
+    will-change: transform;
+  }
+  .contents {
+    height: 1000px;
+    width: 100%;
+  }
+</style>
+<body>
+<div id="log"></div>
+<script type="text/javascript">
+
+//------------------------------------
+// Time-based duration
+//------------------------------------
+
+test(t => {
+  const anim = createScrollLinkedAnimationWithTiming(t, {duration: 1000 });
+  assert_equals(anim.effect.getTiming().duration, 1000);
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 100);
+}, 'Computed duration in percent even when specified in ms');
+
+test(t => {
+  const anim = createScrollLinkedAnimationWithTiming(t, { duration: 1000 });
+  anim.rangeStart = { offset: CSS.percent(20) };
+  anim.rangeEnd = { offset: CSS.percent(80) };
+  assert_equals(anim.effect.getTiming().duration, 1000);
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 60);
+}, 'Time-based duration normalized to fill animation range.');
+
+test(t => {
+  const anim =
+      createScrollLinkedAnimationWithTiming(
+          t, {duration: 700, delay: 100, endDelay: 200 });
+  assert_equals(anim.effect.getTiming().duration, 700);
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 70);
+}, 'Time-based duration normalized to preserve proportional delays.');
+
+//-------------------------------------------------
+// Duration 'auto' = Intrinsic iteration duration
+//-------------------------------------------------
+
+test(t => {
+  const anim = createScrollLinkedAnimationWithTiming(t, {});
+  assert_equals(anim.effect.getTiming().duration, 'auto');
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 100);
+}, 'Intrinsic iteration duration fills timeline.');
+
+test(t => {
+  const anim = createScrollLinkedAnimationWithTiming(t, {});
+  anim.rangeStart = { offset: CSS.percent(30) };
+  anim.rangeEnd = { offset: CSS.percent(90) };
+  assert_equals(anim.effect.getTiming().duration, 'auto');
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 60);
+}, 'Intrinsic iteration duration accounts for animation range.');
+
+test(t => {
+  const anim =
+      createScrollLinkedAnimationWithTiming(
+          t, { iterations: 4 });
+  assert_equals(anim.effect.getTiming().duration, 'auto');
+  assert_percents_equal(anim.effect.getComputedTiming().duration, 25);
+}, 'Intrinsic iteration duration accounts for number of iterations');
+
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/scroll-timeline-range.html b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/scroll-timeline-range.html
new file mode 100644
index 00000000000..cc844cb748e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/scroll-timeline-range.html
@@ -0,0 +1,185 @@
+<!DOCTYPE html>
+<title>Scroll timelines and animation attachment ranges</title>
+<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range">
+<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#animation-range">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+<script src="support/testcommon.js"></script>
+<style>
+  #scroller {
+    overflow-y: scroll;
+    width: 200px;
+    height: 200px;
+    scroll-timeline: --t1;
+  }
+  .spacer {
+    height: 1100px;
+  }
+  #target {
+    height:  100px;
+    width: 0;
+    font-size: 10px;
+    background-color: green;
+  }
+  @keyframes grow {
+    to { width: 200px }
+  }
+  .anim-1 {
+    animation: auto grow linear;
+    animation-timeline: --t1;
+    animation-range-start:  25%;
+    animation-range-end:  75%;
+  }
+  .anim-2 {
+    animation: auto grow linear;
+    animation-timeline: --t1;
+    animation-range-start: 40px;
+    animation-range-end:  700px;
+  }
+  .anim-3 {
+    animation: auto grow linear;
+    animation-timeline: --t1;
+    animation-range-start:  calc(30% + 40px);
+    animation-range-end:  calc(70% - 20px);
+  }
+  .anim-4 {
+    animation: auto grow linear;
+    animation-timeline: --t1;
+    animation-range-start:  5em;
+    animation-range-end:  calc(100% - 5em);
+  }
+
+</style>
+<div id=scroller>
+  <div id=target></div>
+  <div class=spacer></div>
+</div>
+<script>
+  // Test via web-animation API.
+
+  async function test_range_waapi(t, options) {
+    const timeline = new ScrollTimeline({source: scroller, axis: 'block'});
+    const anim =
+        target.animate([{ width: "200px" }],
+                       {
+                         timeline: timeline,
+                         rangeStart: options.rangeStart,
+                         rangeEnd: options.rangeEnd
+                       });
+    t.add_cleanup(() => {
+      anim.cancel();
+    });
+    await anim.ready;
+    scroller.scrollTop = 600;
+    await waitForNextFrame();
+
+    const expectedProgress =
+        (600 - options.startOffset) / (options.endOffset - options.startOffset);
+    assert_approx_equals(anim.effect.getComputedTiming().progress,
+                         expectedProgress, 0.001);
+  }
+
+  promise_test(async t => {
+    await test_range_waapi(t, {
+      rangeStart: "25%",
+      rangeEnd: "75%",
+      startOffset: 250,
+      endOffset: 750
+    });
+  }, 'Scroll timeline with percentage range [JavaScript API]');
+
+  promise_test(async t => {
+    await test_range_waapi(t, {
+      rangeStart: "40px",
+      rangeEnd: "700px",
+      startOffset: 40,
+      endOffset: 700
+    });
+  }, 'Scroll timeline with px range [JavaScript API]');
+
+  promise_test(async t => {
+    await test_range_waapi(t, {
+      rangeStart: "calc(30% + 40px)",
+      rangeEnd: "calc(70% - 20px)",
+      startOffset: 340,
+      endOffset: 680
+    });
+  }, 'Scroll timeline with calculated range [JavaScript API]');
+
+promise_test(async t => {
+    t.add_cleanup(() => {
+      target.style.fontSize = '';
+    });
+    await test_range_waapi(t, {
+      rangeStart: "5em",
+      rangeEnd: "calc(100% - 5em)",
+      startOffset: 50,
+      endOffset: 950
+    });
+    target.style.fontSize =  '20px';
+    await waitForNextFrame();
+    const anim = target.getAnimations()[0];
+    const expectedProgress = (600 - 100) / (900 - 100);
+    assert_approx_equals(anim.effect.getComputedTiming().progress,
+                         expectedProgress, 0.001);
+  }, 'Scroll timeline with EM range [JavaScript API]');
+
+  // Test via CSS.
+  async function test_range_css(t, options) {
+    t.add_cleanup(() => {
+      target.classList.remove(options.animation);
+    });
+    target.classList.add(options.animation);
+    const anim = target.getAnimations()[0];
+    await anim.ready;
+    scroller.scrollTop = 600;
+    await waitForNextFrame();
+
+    const expectedProgress =
+        (600 - options.startOffset) / (options.endOffset - options.startOffset);
+    assert_approx_equals(anim.effect.getComputedTiming().progress,
+                         expectedProgress, 0.001);
+  }
+
+  promise_test(async t => {
+    await test_range_css(t, {
+      animation: "anim-1",
+      startOffset: 250,
+      endOffset: 750
+    });
+  }, 'Scroll timeline with percentage range [CSS]');
+
+  promise_test(async t => {
+    await test_range_css(t, {
+      animation: "anim-2",
+      startOffset: 40,
+      endOffset: 700
+    });
+  }, 'Scroll timeline with px range [CSS]');
+
+  promise_test(async t => {
+    await test_range_css(t, {
+      animation: "anim-3",
+      startOffset: 340,
+      endOffset: 680
+    });
+  }, 'Scroll timeline with calculated range [CSS]');
+
+promise_test(async t => {
+    t.add_cleanup(() => {
+      target.style.fontSize = '';
+    });
+    await test_range_css(t, {
+      animation: "anim-4",
+      startOffset: 50,
+      endOffset: 950
+    });
+    target.style.fontSize =  '20px';
+    await waitForNextFrame();
+    const anim = target.getAnimations()[0];
+    const expectedProgress = (600 - 100) / (900 - 100);
+    assert_approx_equals(anim.effect.getComputedTiming().progress,
+                         expectedProgress, 0.001);
+  }, 'Scroll timeline with EM range [CSS]');
+</script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/set-current-time-before-play.html b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/set-current-time-before-play.html
index cd3faeeee46..280346e755f 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/set-current-time-before-play.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/set-current-time-before-play.html
@@ -40,30 +40,36 @@
 </div>
 
 <script>
-  const box = document.getElementById('box');
-  const effect = new KeyframeEffect(box,
-    [
-    { transform: 'translateY(0)', opacity: 1},
-    { transform: 'translateY(200px)', opacity: 0}
-    ], {
-      duration: 1000,
-    }
-  );
+  async function runTest() {
+    await waitForCompositorReady();
 
-  const scroller = document.getElementById('scroller');
-  const timeline = new ScrollTimeline(
-      { source: scroller, orientation: 'block' });
-  const animation = new Animation(effect, timeline);
-  animation.currentTime = CSS.percent(0);
-  animation.play();
+    const box = document.getElementById('box');
+    const effect = new KeyframeEffect(box,
+      [
+      { transform: 'translateY(0)', opacity: 1},
+      { transform: 'translateY(200px)', opacity: 0}
+      ], {
+        duration: 1000,
+      }
+    );
 
-  animation.ready.then(() => {
-    // Move the scroller to the halfway point.
-    const maxScroll = scroller.scrollHeight - scroller.clientHeight;
-    scroller.scrollTop = 0.5 * maxScroll;
+    const scroller = document.getElementById('scroller');
+    const timeline = new ScrollTimeline(
+        { source: scroller, orientation: 'block' });
+    const animation = new Animation(effect, timeline);
+    animation.currentTime = CSS.percent(0);
+    animation.play();
 
-    waitForAnimationFrames(2).then(_ => {
-      takeScreenshot();
+    animation.ready.then(() => {
+      // Move the scroller to the halfway point.
+      const maxScroll = scroller.scrollHeight - scroller.clientHeight;
+      scroller.scrollTop = 0.5 * maxScroll;
+
+      waitForAnimationFrames(2).then(_ => {
+        takeScreenshot();
+      });
     });
-  });
+  }
+
+  window.onload = runTest;
 </script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html
index 4a7e7366f79..5813de60fab 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/scroll-timelines/setting-timeline.tentative.html
@@ -9,7 +9,8 @@
 <script src="testcommon.js"></script>
 <style>
   .scroller {
-    overflow: auto;
+    overflow-x: hidden;
+    overflow-y: auto;
     height: 200px;
     width: 100px;
     will-change: transform;
@@ -26,6 +27,12 @@
   .anim {
     animation: anim 1s paused linear;
   }
+  #target {
+    height:  100px;
+    width:  100px;
+    background-color: green;
+    margin-top: -1000px;
+  }
 </style>
 <body>
 <script>
@@ -91,6 +98,17 @@ function assert_paused_times(animation, timeline_current_time,
   }
 }
 
+function createViewTimeline(t) {
+  const parent = document.querySelector('.scroller');
+  const elem = document.createElement('div');
+  elem.id = 'target';
+  t.add_cleanup(() => {
+    elem.remove();
+  });
+  parent.appendChild(elem);
+  return new ViewTimeline({ subject: elem });
+}
+
 promise_test(async t => {
   const scrollTimeline = createScrollTimeline(t);
   await updateScrollPosition(scrollTimeline, 100);
@@ -153,8 +171,9 @@ promise_test(async t => {
   await animation.ready;
 
   animation.timeline = scrollTimeline;
-  assert_false(animation.pending);
+  assert_true(animation.pending);
   assert_equals(animation.playState, 'running');
+  await animation.ready;
   assert_scroll_synced_times(animation, 10, 10);
 },  'Setting a scroll timeline on a running animation synchronizes the ' +
     'currentTime of the animation with the scroll position.');
@@ -278,6 +297,8 @@ promise_test(async t => {
 
   animation.timeline = scrollTimeline;
   assert_equals(animation.playState, 'running');
+  await animation.ready;
+
   assert_percents_equal(animation.currentTime, 10);
 }, 'Switching from a null timeline to a scroll timeline on an animation with ' +
    'a resolved start time preserved the play state');
@@ -295,6 +316,8 @@ promise_test(async t => {
   assert_percents_equal(animation.currentTime, 10);
 
   animation.timeline = secondScrollTimeline;
+  await animation.ready;
+
   assert_percents_equal(animation.currentTime, 20);
 }, 'Switching from one scroll timeline to another updates currentTime');
 
@@ -368,5 +391,39 @@ promise_test(async t => {
 }, 'Switching from a document timeline to a scroll timeline on an infinite ' +
    'duration animation.');
 
+
+promise_test(async t => {
+  const scrollTimeline = createScrollTimeline(t);
+  const view_timeline = createViewTimeline(t);
+  await updateScrollPosition(scrollTimeline, 100);
+  const animation = createAnimation(t);
+  animation.timeline = scrollTimeline;
+  // Range name is ignored while attached to a non-view scroll-timeline.
+  // Offsets are still applied to the scroll-timeline.
+  animation.rangeStart = { rangeName: 'contain', offset: CSS.percent(10) };
+  animation.rangeEnd = { rangeName: 'contain', offset: CSS.percent(90) };
+  await animation.ready;
+
+  assert_scroll_synced_times(animation, 10, 0);
+  assert_percents_equal(animation.startTime, 10);
+
+  animation.timeline = view_timeline;
+  assert_true(animation.pending);
+  await animation.ready;
+
+  // Cover range is [0px, 300px]
+  // Contain range is [100px, 200px]
+  // start time = (contain 10% pos - cover start pos) / cover range * 100%
+  const expected_start_time = 110 / 300 * 100;
+  // timeline time = (scroll pos - cover start pos) / cover range * 100%
+  const expected_timeline_time = 100 / 300 * 100;
+  // current time = timeline time - start time.
+  const expected_current_time = expected_timeline_time - expected_start_time;
+
+  assert_percents_equal(animation.startTime, expected_start_time);
+  assert_percents_equal(animation.timeline.currentTime, expected_timeline_time);
+  assert_percents_equal(animation.currentTime, expected_current_time);
+}, 'Changing from a scroll-timeline to a view-timeline updates start time.');
+
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/view-timelines/timeline-offset-in-keyframe.html b/tests/wpt/web-platform-tests/scroll-animations/view-timelines/timeline-offset-in-keyframe.html
index 62a8d1387d3..11688938542 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/view-timelines/timeline-offset-in-keyframe.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/view-timelines/timeline-offset-in-keyframe.html
@@ -213,12 +213,13 @@
       assert_opacity_equals(1, `Opacity with document timeline`);
 
       anim.timeline = new ViewTimeline( { subject: target });
-      await waitForNextFrame();
+      await anim.ready;
 
       assert_progress_equals(anim, 0.5, `Progress at contain 50%`);
       assert_opacity_equals(0.5, `Opacity at contain 50%`);
 
       anim.timeline = document.timeline;
+      assert_false(anim.pending);
       await waitForNextFrame();
       assert_opacity_equals(1, `Opacity after resetting timeline`);
 
@@ -251,7 +252,7 @@
       assert_progress_equals(
           anim, 0.5, `Progress at contain 50% after effect change`);
       assert_opacity_equals(0.5, `Opacity at contain 50% after effect change`);
-    }, 'Timeline offsets in programmetic keyframes resolved when updating ' +
+    }, 'Timeline offsets in programmatic keyframes resolved when updating ' +
        'the animation effect');
   }
 
diff --git a/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html b/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html
deleted file mode 100644
index 1c01fa0e89c..00000000000
--- a/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html
+++ /dev/null
@@ -1,57 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>Test for the 'secure-payment-confirmation' payment method authentication - accepted case</title>
-<link rel="help" href="https://w3c.github.io/secure-payment-confirmation#sctn-authentication">
-<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>
-<!-- For minimize() -->
-<script src="/page-visibility/resources/window_state_context.js"></script>
-<script src="utils.sub.js"></script>
-<script>
-'use strict';
-
-promise_test(async t => {
-  const {minimize, restore} = window_state_context(t);
-
-  const authenticator = await window.test_driver.add_virtual_authenticator(
-      AUTHENTICATOR_OPTS);
-  t.add_cleanup(() => {
-    return window.test_driver.remove_virtual_authenticator(authenticator);
-  });
-
-  await window.test_driver.set_spc_transaction_mode("autoAccept");
-  t.add_cleanup(() => {
-    return window.test_driver.set_spc_transaction_mode("none");
-  });
-
-  const credential = await createCredential();
-
-  const challenge = 'server challenge';
-  const payeeOrigin = 'https://merchant.com';
-  const displayName = 'Troycard ***1234';
-  const request = new PaymentRequest([{
-    supportedMethods: 'secure-payment-confirmation',
-    data: {
-      credentialIds: [credential.rawId],
-      challenge: Uint8Array.from(challenge, c => c.charCodeAt(0)),
-      payeeOrigin,
-      rpId: window.location.hostname,
-      timeout: 60000,
-      instrument: {
-        displayName,
-        icon: ICON_URL,
-      },
-    }
-  }], PAYMENT_DETAILS);
-
-  // Before we trigger the Payment Request, minimize the window. This should
-  // cause the show() call to be rejected.
-  await minimize();
-  assert_equals(document.hidden, true);
-
-  await test_driver.bless('user activation');
-  return promise_rejects_dom(t, "AbortError", request.show());
-}, 'SPC authentication cannot be triggered from a hidden context');
-</script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/blob_object_url.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/blob_object_url.html
new file mode 100644
index 00000000000..fe673d86392
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/blob_object_url.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<title>Same-origin prerendering page can create a url for the given
+objects</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="resources/utils.js"></script>
+<body>
+<script>
+
+setup(() => assertSpeculationRulesIsSupported());
+
+promise_test(async t => {
+  const {exec} = await create_prerendered_page(t);
+
+  const result = await exec(async () => {
+    const blob_contents = "test blob contents";
+    const blob = new Blob([blob_contents]);
+    const url = URL.createObjectURL(blob);
+    const fetched_content = await fetch(url).then(response => response.text());
+    URL.revokeObjectURL(url);
+    return fetched_content === blob_contents ? "PASS" : "FAIL";
+  });
+
+  // Start prerendering a page that attempts to create a url for a blob.
+  assert_equals(
+    result, "PASS",
+    'prerendering page should be able to create a url for blob and fetch it.');
+}, 'prerendering page should be able create url');
+
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/fetch-blob.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/fetch-blob.html
index 7f8d5570493..098a5a51289 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prerender/fetch-blob.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/fetch-blob.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<title>Same-origin prerendering can access localStorage</title>
+<title>Same-origin prerendering can access blobs</title>
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/restrictions.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/restrictions.html
index 5019d4b280c..1990dfa1fc4 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prerender/restrictions.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/restrictions.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<title>Same-origin prerendering can access localStorage</title>
+<title>Same-origin prerendering cannot access some APIs</title>
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/svg/types/scripted/SVGAnimatedEnumeration-SVGMarkerElement.html b/tests/wpt/web-platform-tests/svg/types/scripted/SVGAnimatedEnumeration-SVGMarkerElement.html
index dfc9dd24800..61c44d0d178 100644
--- a/tests/wpt/web-platform-tests/svg/types/scripted/SVGAnimatedEnumeration-SVGMarkerElement.html
+++ b/tests/wpt/web-platform-tests/svg/types/scripted/SVGAnimatedEnumeration-SVGMarkerElement.html
@@ -3,14 +3,22 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
+function createMarker() {
+  let markerElement = document.createElementNS("http://www.w3.org/2000/svg", "marker");
+  markerElement.setAttribute("markerUnits", "userSpaceOnUse");
+  markerElement.setAttribute("orient", "auto");
+  return markerElement;
+}
+
+function createSVGAngle() {
+  let svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
+  return svgElement.createSVGAngle();
+}
+
 test(function() {
   // This test checks the use of SVGAnimatedEnumeration within SVGMarkerElement.
 
-  var markerElement = document.createElementNS("http://www.w3.org/2000/svg", "marker");
-  markerElement.setAttribute("markerUnits", "userSpaceOnUse");
-  markerElement.setAttribute("orient", "auto");
-
-  var svgElement = document.createElementNS("http://www.w3.org/2000/svg", "svg");
+  let markerElement = createMarker();
 
   // markerUnits
   // Check initial 'markerUnits' value.
@@ -40,6 +48,10 @@ test(function() {
   markerElement.markerUnits.baseVal = SVGMarkerElement.SVG_MARKERUNITS_USERSPACEONUSE;
   assert_equals(markerElement.markerUnits.baseVal, SVGMarkerElement.SVG_MARKERUNITS_USERSPACEONUSE);
   assert_equals(markerElement.getAttribute('markerUnits'), "userSpaceOnUse");
+}, "Test SVGAnimatedEnumeration");
+
+test(function() {
+  let markerElement = createMarker();
 
   // orientType
   // Check initial 'orient' value.
@@ -50,7 +62,7 @@ test(function() {
   assert_equals(markerElement.orientType.baseVal, SVGMarkerElement.SVG_MARKER_ORIENT_AUTO);
 
   // Switch to 'Pi/2 rad' value - via setOrientToAngle().
-  anglePiHalfRad = svgElement.createSVGAngle();
+  let anglePiHalfRad = createSVGAngle();
   anglePiHalfRad.newValueSpecifiedUnits(SVGAngle.SVG_ANGLETYPE_RAD, (Math.PI / 2).toFixed(2));
   markerElement.setOrientToAngle(anglePiHalfRad);
   assert_equals(markerElement.orientAngle.baseVal.value.toFixed(1), "90.0");
@@ -66,7 +78,7 @@ test(function() {
   assert_equals(markerElement.getAttribute('orient'), "auto");
 
   // Switch to '20deg' value - via setOrientToAngle().
-  angle20deg = svgElement.createSVGAngle();
+  let angle20deg = createSVGAngle();
   angle20deg.newValueSpecifiedUnits(SVGAngle.SVG_ANGLETYPE_DEG, 20);
   markerElement.setOrientToAngle(angle20deg);
   assert_equals(markerElement.orientAngle.baseVal.value, 20);
@@ -90,15 +102,6 @@ test(function() {
 
   markerElement.setAttribute('orient', '10deg');
 
-  // Switch to 'auto-start-reverse' value - by modifying orientType.
-  markerElement.orientType.baseVal = SVGMarkerElement.SVG_MARKER_ORIENT_AUTO_START_REVERSE;
-  assert_equals(markerElement.orientAngle.baseVal.value, 0);
-  assert_equals(markerElement.orientAngle.baseVal.unitType, SVGAngle.SVG_ANGLETYPE_UNSPECIFIED);
-  assert_equals(markerElement.orientType.baseVal, SVGMarkerElement.SVG_MARKER_ORIENT_AUTO_START_REVERSE);
-  assert_equals(markerElement.getAttribute('orient'), "auto-start-reverse");
-
-  markerElement.setAttribute('orient', '10deg');
-
   // Try setting invalid values.
   assert_throws_js(TypeError, function() { markerElement.orientType.baseVal = 4; });
   assert_equals(markerElement.orientType.baseVal, SVGMarkerElement.SVG_MARKER_ORIENT_ANGLE);
@@ -118,5 +121,38 @@ test(function() {
   assert_equals(markerElement.orientAngle.baseVal.unitType, SVGAngle.SVG_ANGLETYPE_UNSPECIFIED);
   assert_equals(markerElement.orientType.baseVal, SVGMarkerElement.SVG_MARKER_ORIENT_AUTO);
   assert_equals(markerElement.getAttribute('orient'), "auto");
-});
+}, "Test SVGOrient");
+
+test(function() {
+  let markerElement = createMarker();
+
+  markerElement.setAttribute('orient', '400grad');
+  assert_equals(markerElement.orientAngle.baseVal.value, 360);
+  assert_equals(markerElement.orientAngle.baseVal.unitType, SVGAngle.SVG_ANGLETYPE_GRAD);
+}, "Test grad units");
+
+test(function() {
+  let markerElement = createMarker();
+
+  markerElement.setAttribute('orient', '1turn');
+  assert_equals(markerElement.orientAngle.baseVal.value, 360);
+  assert_equals(markerElement.orientAngle.baseVal.unitType, SVGAngle.SVG_ANGLETYPE_UNKNOWN);
+
+  let angle = createSVGAngle();
+  angle = markerElement.orientAngle.baseVal;
+  angle.value = 720;
+  markerElement.setOrientToAngle(angle);
+  assert_equals(markerElement.getAttribute('orient'), "2turn");
+}, "Test turn units");
+
+test(function() {
+  let markerElement = createMarker();
+
+  // Switch to 'auto-start-reverse' value - by modifying orientType.
+  markerElement.orientType.baseVal = SVGMarkerElement.SVG_MARKER_ORIENT_AUTO_START_REVERSE;
+  assert_equals(markerElement.orientAngle.baseVal.value, 0);
+  assert_equals(markerElement.orientAngle.baseVal.unitType, SVGAngle.SVG_ANGLETYPE_UNSPECIFIED);
+  assert_equals(markerElement.orientType.baseVal, SVGMarkerElement.SVG_MARKER_ORIENT_AUTO_START_REVERSE);
+  assert_equals(markerElement.getAttribute('orient'), "auto-start-reverse");
+}, "Test auto-start-reverse");
 </script>
diff --git a/tests/wpt/web-platform-tests/tools/wpt/virtualenv.py b/tests/wpt/web-platform-tests/tools/wpt/virtualenv.py
index 87f5d4281fe..c5e45033141 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/virtualenv.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/virtualenv.py
@@ -115,7 +115,7 @@ class Virtualenv:
         if "venv" in schemes:
             scheme = "venv"
         else:
-            scheme = "nt_user" if os.name == "nt" else "posix_user"
+            scheme = "nt" if os.name == "nt" else "posix_user"
         sys_paths = sysconfig.get_paths(scheme)
         data_path = sys_paths["data"]
         added = set()
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome.py
index 3bdbf6f962c..b15d9ccb369 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/chrome.py
@@ -136,6 +136,9 @@ def executor_kwargs(logger, test_type, test_environment, run_info_data,
         chrome_options["args"].append(
             f"--origin-to-force-quic-on=web-platform.test:{webtranport_h3_port[0]}")
 
+    if test_type == "wdspec":
+        executor_kwargs["binary_args"] = chrome_options["args"]
+
     executor_kwargs["capabilities"] = capabilities
 
     return executor_kwargs
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/firefox.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/firefox.py
index d2e386484f9..d9c9481f327 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/firefox.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/firefox.py
@@ -140,13 +140,16 @@ def executor_kwargs(logger, test_type, test_environment, run_info_data,
     if test_type == "wdspec":
         options = {"args": []}
         if kwargs["binary"]:
-            options["binary"] = kwargs["binary"]
+            if "webdriver_args" not in executor_kwargs:
+                executor_kwargs["webdriver_args"] = []
+            executor_kwargs["webdriver_args"].extend(["--binary", kwargs["binary"]])
         if kwargs["binary_args"]:
             options["args"] = kwargs["binary_args"]
 
         if not kwargs["binary"] and kwargs["headless"] and "--headless" not in options["args"]:
             options["args"].append("--headless")
 
+        executor_kwargs["binary_args"] = options["args"]
         capabilities["moz:firefoxOptions"] = options
 
     if kwargs["certutil_binary"] is None:
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/webkitgtk_minibrowser.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/webkitgtk_minibrowser.py
index a574328c326..4b247dd36e3 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/webkitgtk_minibrowser.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/webkitgtk_minibrowser.py
@@ -63,6 +63,8 @@ def executor_kwargs(logger, test_type, test_environment, run_info_data,
     executor_kwargs = base_executor_kwargs(test_type, test_environment, run_info_data, **kwargs)
     executor_kwargs["close_after_done"] = True
     executor_kwargs["capabilities"] = capabilities(test_environment.config, **kwargs)
+    if test_type == "wdspec":
+        executor_kwargs["binary_args"] = capabilities["webkitgtk:browserOptions"]["args"]
     return executor_kwargs
 
 
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
index 3159bb3c3a2..4b715a1f317 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
@@ -36,6 +36,7 @@ def executor_kwargs(test_type, test_environment, run_info_data, **kwargs):
 
     if test_type == "wdspec":
         executor_kwargs["binary"] = kwargs.get("binary")
+        executor_kwargs["binary_args"] = kwargs.get("args")
         executor_kwargs["webdriver_binary"] = kwargs.get("webdriver_binary")
         executor_kwargs["webdriver_args"] = kwargs.get("webdriver_args")
 
@@ -609,7 +610,7 @@ class WdspecExecutor(TestExecutor):
 
     def __init__(self, logger, browser, server_config, webdriver_binary,
                  webdriver_args, timeout_multiplier=1, capabilities=None,
-                 debug_info=None, **kwargs):
+                 debug_info=None, binary=None, binary_args=None, **kwargs):
         super().__init__(logger, browser, server_config,
                          timeout_multiplier=timeout_multiplier,
                          debug_info=debug_info)
@@ -617,6 +618,8 @@ class WdspecExecutor(TestExecutor):
         self.webdriver_args = webdriver_args
         self.timeout_multiplier = timeout_multiplier
         self.capabilities = capabilities
+        self.binary = binary
+        self.binary_args = binary_args
 
     def setup(self, runner):
         self.protocol = self.protocol_cls(self, self.browser)
@@ -645,6 +648,10 @@ class WdspecExecutor(TestExecutor):
                           "port": self.browser.port,
                           "capabilities": self.capabilities,
                           "timeout_multiplier": self.timeout_multiplier,
+                          "browser": {
+                              "binary": self.binary,
+                              "args": self.binary_args
+                          },
                           "webdriver": {
                               "binary": self.webdriver_binary,
                               "args": self.webdriver_args
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
index b1346d51df1..d2ed58444ab 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
@@ -700,16 +700,17 @@ class TestRunnerManager(threading.Thread):
 
         self.test_count += 1
         is_unexpected = expected != status and status not in known_intermittent
+        is_pass_or_expected = status in ["OK", "PASS"] or (not is_unexpected)
 
         if is_unexpected or subtest_unexpected:
             self.unexpected_tests.add(test.id)
 
         # A result is unexpected pass if the test or any subtest run
-        # unexpectedly, and the overall status is OK (for test harness test), or
-        # PASS (for reftest), and all unexpected results for subtests (if any) are
-        # unexpected pass.
+        # unexpectedly, and the overall status is expected or passing (OK for test
+        # harness test, or PASS for reftest), and all unexpected results for
+        # subtests (if any) are unexpected pass.
         is_unexpected_pass = ((is_unexpected or subtest_unexpected) and
-                              status in ["OK", "PASS"] and subtest_all_pass_or_expected)
+                              is_pass_or_expected and subtest_all_pass_or_expected)
         if is_unexpected_pass:
             self.unexpected_pass_tests.add(test.id)
 
diff --git a/tests/wpt/web-platform-tests/url/resources/percent-encoding.json b/tests/wpt/web-platform-tests/url/resources/percent-encoding.json
index bd81edbdc35..eccd1db62fe 100644
--- a/tests/wpt/web-platform-tests/url/resources/percent-encoding.json
+++ b/tests/wpt/web-platform-tests/url/resources/percent-encoding.json
@@ -44,13 +44,5 @@
     "output": {
       "utf-8": "%C3%A1|"
     }
-  },
-  "Surrogate!",
-  {
-    "input": "\ud800",
-    "output": {
-      "utf-8": "%EF%BF%BD",
-      "windows-1252": "%26%2365533%3B"
-    }
   }
 ]
diff --git a/tests/wpt/web-platform-tests/url/resources/urltestdata.json b/tests/wpt/web-platform-tests/url/resources/urltestdata.json
index 1aa42a51455..ec189871d90 100644
--- a/tests/wpt/web-platform-tests/url/resources/urltestdata.json
+++ b/tests/wpt/web-platform-tests/url/resources/urltestdata.json
@@ -7907,6 +7907,22 @@
     "search": "",
     "hash": ""
   },
+  "Percent-encoded http: in blob:",
+  {
+    "input": "blob:http%3a//example.org/",
+    "base": null,
+    "href": "blob:http%3a//example.org/",
+    "origin": "null",
+    "protocol": "blob:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "http%3a//example.org/",
+    "search": "",
+    "hash": ""
+  },
   "Invalid IPv4 radix digits",
   {
     "input": "http://0x7f.0.0.0x7g",
@@ -9484,5 +9500,35 @@
     "input": "stun://[:1]",
     "base": null,
     "failure": true
+  },
+  {
+    "input": "w://x:0",
+    "base": null,
+    "href": "w://x:0",
+    "origin": "null",
+    "protocol": "w:",
+    "username": "",
+    "password": "",
+    "host": "x:0",
+    "hostname": "x",
+    "port": "0",
+    "pathname": "",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "west://x:0",
+    "base": null,
+    "href": "west://x:0",
+    "origin": "null",
+    "protocol": "west:",
+    "username": "",
+    "password": "",
+    "host": "x:0",
+    "hostname": "x",
+    "port": "0",
+    "pathname": "",
+    "search": "",
+    "hash": ""
   }
 ]
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/abstract-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/abstract-roles.html
index 8a98ba74ead..520ecf2dbb3 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/abstract-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/abstract-roles.html
@@ -12,7 +12,8 @@
 <body>
 
 
-<p>Verifies <a href="https://w3c.github.io/aria/#document-handling_author-errors_roles">9.1 Roles - handling author errors</a></p>
+<p>Tests <a href="https://w3c.github.io/aria/#abstract_roles">Abstract Roles</a> and related <a href="https://w3c.github.io/aria/#document-handling_author-errors_roles">9.1 Roles - handling author errors</a></p>
+
   <nav role="command" data-testname="command role" data-expectedrole="navigation" class="ex">x</nav>
   <nav role="composite" data-testname="composite role" data-expectedrole="navigation" class="ex">x</nav>
   <nav role="input" data-testname="input role" data-expectedrole="navigation" class="ex">x</nav>
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/fallback-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/fallback-roles.html
index eb6e89b29ae..6f42fa693e5 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/fallback-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/fallback-roles.html
@@ -11,7 +11,7 @@
   </head>
   <body>
 
-  <p>Verifies Fallback Roles from <a href="https://w3c.github.io/aria/#document-handling_author-errors_roles">9.1 Roles - handling author errors</a></p>
+  <p>Tests <a href="https://w3c.github.io/aria/#host_general_role">8.1 Role Attribute</a> role token list selection and <a href="https://w3c.github.io/aria/#document-handling_author-errors_roles">9.1 Roles - handling author errors</a>.</p>
 
   <nav role="region group" data-testname="fallback role w/ region with no label" data-expectedrole="group" class="ex">x</nav>
   <nav role="region group" data-testname="fallback role w/ region with label" aria-label="x" data-expectedrole="region" class="ex">x</nav>
@@ -19,7 +19,7 @@
 <!-- todo: additional fallback roles:
 
 - valid/valid "switch checkbox"
-- valid/invalid "foo group"
+- invalid/valid "foo group"
 - unicode char tests with fallback
 - whitespace tests with fallback
 - unicode char tests with fallback
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/invalid-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/invalid-roles.html
index e7d38dc8c95..da2370583a2 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/invalid-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/invalid-roles.html
@@ -20,7 +20,7 @@
 
 - whitespace tests (including line breaks, tabs, zero-width space, braille space)
 - diacritics
-- joiners (e.g. like emoji variants use)
+- zero-width joiners (e.g. ZWJ like emoji variants use)
 - non-western chars
 - RTL strings (Hebrew & Arabic)
 - escaped chars, URL-encoded chars
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/list-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/list-roles.html
index 5d9787f04bf..da097ce67e8 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/list-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/list-roles.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests <a href="https://w3c.github.io/aria/#list">list</a> and related roles.</p>
+
 <div role="list" data-testname="first simple list" data-expectedrole="list" class="ex">
   <div role="listitem" data-testname="first simple listitem" data-expectedrole="listitem" class="ex">x</div>
   <div role="listitem" data-testname="last simple listitem" data-expectedrole="listitem" class="ex">x</div>
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/region-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/region-roles.html
index d087f8f69bd..d80570a97bc 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/region-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/region-roles.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests <a href="https://w3c.github.io/aria/#region">region</a> and related roles, as well as the "name from author" rule in <a href="https://w3c.github.io/aria/#document-handling_author-errors_roles">9.1 Roles - handling author errors</a>.</p>
+
 <!-- no label -->
 <nav role="region" data-testname="region without label" data-expectedrole="navigation" class="ex">x</nav>
 
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/roles.html b/tests/wpt/web-platform-tests/wai-aria/role/roles.html
index 72c9cdd0cd3..844da3ce47b 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/roles.html
@@ -10,6 +10,9 @@
   <script src="/wai-aria/scripts/aria-utils.js"></script>
 </head>
 <body>
+
+<p>Tests most <a href="https://w3c.github.io/aria/#role_definitions">ARIA role definitions</a>. See comments for more info.</p>
+
 <script>
 
 /*
diff --git a/tests/wpt/web-platform-tests/wai-aria/role/synonym-roles.html b/tests/wpt/web-platform-tests/wai-aria/role/synonym-roles.html
index 59d913a60a3..06a6a776f45 100644
--- a/tests/wpt/web-platform-tests/wai-aria/role/synonym-roles.html
+++ b/tests/wpt/web-platform-tests/wai-aria/role/synonym-roles.html
@@ -11,6 +11,8 @@
 </head>
 <body>
 
+<p>Tests synonym roles image/img and none/presentation via <a href="https://w3c.github.io/core-aam/#roleMappingComputedRole">Core-AAM Computed Role</a>.</p>
+
 <!-- spec resolution https://github.com/w3c/core-aam/issues/166 -->
 
 <div role="none" id="none" data-expectedrole="none" data-testname="none role == computedrole none" class="ex">x</div><!-- preferred -->
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https.html
index 98b5d2bab7a..c5d46cedfd8 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https.html
@@ -30,7 +30,8 @@ a=ice-options:trickle
 a=fingerprint:sha-256 5B:D3:8E:66:0E:7D:D3:F3:8E:E6:80:28:19:FC:55:AD:58:5D:B9:3D:A8:DE:45:4A:E7:87:02:F8:3C:0B:3B:B3
 a=setup:actpass
 a=mid:0
-a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
+a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
+a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
 a=recvonly
 a=rtcp-mux
 a=rtpmap:96 VP8/90000
diff --git a/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-closed-webrtc-connection.https.window.js b/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-closed-webrtc-connection.https.window.js
new file mode 100644
index 00000000000..320803adec2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-closed-webrtc-connection.https.window.js
@@ -0,0 +1,19 @@
+// META: title=Testing BFCache support for page with closed WebRTC connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=resources/webrtc-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openThenCloseWebRTC(rc1);
+  // The page should be eligible for BFCache because the WebRTC connection is closed.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ true);
+});
diff --git a/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-open-webrtc-connection.https.window.js b/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-open-webrtc-connection.https.window.js
new file mode 100644
index 00000000000..4a4807d5141
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/back-forward-cache-with-open-webrtc-connection.https.window.js
@@ -0,0 +1,20 @@
+// META: title=Testing BFCache support for page with open WebRTC connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=resources/webrtc-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openWebRTC(rc1);
+  // The page should not be eligible for BFCache because of open WebRTC connection.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ false);
+  await assertNotRestoredFromBFCache(rc1, ['WebRTC']);
+});
diff --git a/tests/wpt/web-platform-tests/webrtc/protocol/simulcast-answer.html b/tests/wpt/web-platform-tests/webrtc/protocol/simulcast-answer.html
index 5e19bc08ff5..f3732ca44c9 100644
--- a/tests/wpt/web-platform-tests/webrtc/protocol/simulcast-answer.html
+++ b/tests/wpt/web-platform-tests/webrtc/protocol/simulcast-answer.html
@@ -21,7 +21,8 @@ a=ice-options:trickle
 a=fingerprint:sha-256 5B:D3:8E:66:0E:7D:D3:F3:8E:E6:80:28:19:FC:55:AD:58:5D:B9:3D:A8:DE:45:4A:E7:87:02:F8:3C:0B:3B:B3
 a=setup:actpass
 a=mid:0
-a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
+a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
+a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
 a=recvonly
 a=rtcp-mux
 a=rtpmap:96 VP8/90000
diff --git a/tests/wpt/web-platform-tests/webrtc/resources/webrtc-test-helpers.sub.js b/tests/wpt/web-platform-tests/webrtc/resources/webrtc-test-helpers.sub.js
new file mode 100644
index 00000000000..48882b30ccc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/resources/webrtc-test-helpers.sub.js
@@ -0,0 +1,79 @@
+// SDP copied from JSEP Example 7.1
+// It contains two media streams with different ufrags
+// to test if candidate is added to the correct stream
+const sdp = `v=0
+o=- 4962303333179871722 1 IN IP4 0.0.0.0
+s=-
+t=0 0
+a=ice-options:trickle
+a=group:BUNDLE a1 v1
+a=group:LS a1 v1
+m=audio 10100 UDP/TLS/RTP/SAVPF 96 0 8 97 98
+c=IN IP4 203.0.113.100
+a=mid:a1
+a=sendrecv
+a=rtpmap:96 opus/48000/2
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:97 telephone-event/8000
+a=rtpmap:98 telephone-event/48000
+a=maxptime:120
+a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
+a=extmap:2 urn:ietf:params:rtp-hdrext:ssrc-audio-level
+a=msid:47017fee-b6c1-4162-929c-a25110252400 f83006c5-a0ff-4e0a-9ed9-d3e6747be7d9
+a=ice-ufrag:ETEn
+a=ice-pwd:OtSK0WpNtpUjkY4+86js7ZQl
+a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2
+a=setup:actpass
+a=dtls-id:1
+a=rtcp:10101 IN IP4 203.0.113.100
+a=rtcp-mux
+a=rtcp-rsize
+m=video 10102 UDP/TLS/RTP/SAVPF 100 101
+c=IN IP4 203.0.113.100
+a=mid:v1
+a=sendrecv
+a=rtpmap:100 VP8/90000
+a=rtpmap:101 rtx/90000
+a=fmtp:101 apt=100
+a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
+a=rtcp-fb:100 ccm fir
+a=rtcp-fb:100 nack
+a=rtcp-fb:100 nack pli
+a=msid:47017fee-b6c1-4162-929c-a25110252400 f30bdb4a-5db8-49b5-bcdc-e0c9a23172e0
+a=ice-ufrag:BGKk
+a=ice-pwd:mqyWsAjvtKwTGnvhPztQ9mIf
+a=fingerprint:sha-256 19:E2:1C:3B:4B:9F:81:E6:B8:5C:F4:A5:A8:D8:73:04:BB:05:2F:70:9F:04:A9:0E:05:E9:26:33:E8:70:88:A2
+a=setup:actpass
+a=dtls-id:1
+a=rtcp:10103 IN IP4 203.0.113.100
+a=rtcp-mux
+a=rtcp-rsize
+`;
+
+const sessionDesc = { type: 'offer', sdp };
+const candidate = {
+  candidate: 'candidate:1 1 udp 2113929471 203.0.113.100 10100 typ host',
+  sdpMid: 'a1',
+  sdpMLineIndex: 0,
+  usernameFragment: 'ETEn'
+};
+
+// Opens a new WebRTC connection.
+async function openWebRTC(remoteContextHelper) {
+  await remoteContextHelper.executeScript(async (sessionDesc, candidate) => {
+    const testRTCPeerConnection = new RTCPeerConnection();
+    await testRTCPeerConnection.setRemoteDescription(sessionDesc);
+    await testRTCPeerConnection.addIceCandidate(candidate);
+  }, [sessionDesc, candidate]);
+}
+
+// Opens a new WebRTC connection and then close it.
+async function openThenCloseWebRTC(remoteContextHelper) {
+  await remoteContextHelper.executeScript(async (sessionDesc, candidate) => {
+    const testRTCPeerConnection = new RTCPeerConnection();
+    await testRTCPeerConnection.setRemoteDescription(sessionDesc);
+    await testRTCPeerConnection.addIceCandidate(candidate);
+    testRTCPeerConnection.close();
+  }, [sessionDesc, candidate]);
+}
diff --git a/tests/wpt/web-platform-tests/webrtc/simulcast/setParameters-encodings.https.html b/tests/wpt/web-platform-tests/webrtc/simulcast/setParameters-encodings.https.html
index ac04ca55fb1..86274a0c5a3 100644
--- a/tests/wpt/web-platform-tests/webrtc/simulcast/setParameters-encodings.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/simulcast/setParameters-encodings.https.html
@@ -183,7 +183,8 @@ a=ice-options:trickle
 a=fingerprint:sha-256 5B:D3:8E:66:0E:7D:D3:F3:8E:E6:80:28:19:FC:55:AD:58:5D:B9:3D:A8:DE:45:4A:E7:87:02:F8:3C:0B:3B:B3
 a=setup:actpass
 a=mid:0
-a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
+a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
+a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
 a=recvonly
 a=rtcp-mux
 a=rtpmap:96 VP8/90000
diff --git a/tests/wpt/web-platform-tests/webrtc/simulcast/simulcast.js b/tests/wpt/web-platform-tests/webrtc/simulcast/simulcast.js
index 3aa0fc42870..1886531023d 100644
--- a/tests/wpt/web-platform-tests/webrtc/simulcast/simulcast.js
+++ b/tests/wpt/web-platform-tests/webrtc/simulcast/simulcast.js
@@ -77,6 +77,25 @@ function midToRid(description, localDescription, rids) {
   }
 
   const localMid = localDescription ? SDPUtils.getMid(SDPUtils.splitSections(localDescription.sdp)[1]) : '0';
+  if (localDescription) {
+    const localVideoSection = SDPUtils.splitSections(localDescription.sdp)[1];
+    const localParameters = SDPUtils.parseRtpParameters(localVideoSection);
+
+    const localMidExtension = localParameters.headerExtensions
+      .find(ext => ext.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid');
+    if (localMidExtension) {
+      rtpParameters.headerExtensions.push(localMidExtension);
+    }
+  } else {
+    // Find unused id in remote description to formally have a mid.
+    for (let id = 1; id < 15; id++) {
+      if (rtpParameters.headerExtensions.find(ext => ext.id === id) === undefined) {
+        rtpParameters.headerExtensions.push(
+          {id, uri: 'urn:ietf:params:rtp-hdrext:sdes:mid'});
+        break;
+      }
+    }
+  }
 
   if (!rids) {
     rids = [];
@@ -165,8 +184,15 @@ async function doAnswerToSendSimulcast(offerer, answerer) {
   const sections = SDPUtils.splitSections(offerer.localDescription.sdp);
   sections.shift();
   const mids = sections.map(section => SDPUtils.getMid(section));
+  let nonSimulcastAnswer = ridToMid(answerer.localDescription, mids);
+  // Restore MID RTP header extension.
+  const localParameters = SDPUtils.parseRtpParameters(sections[0]);
 
-  const nonSimulcastAnswer = ridToMid(answerer.localDescription, mids);
+  const localMidExtension = localParameters.headerExtensions
+    .find(ext => ext.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid');
+  if (localMidExtension) {
+    nonSimulcastAnswer += SDPUtils.writeExtmap(localMidExtension);
+  }
   await offerer.setRemoteDescription({
     type: 'answer',
     sdp: nonSimulcastAnswer,
diff --git a/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-closed-websocket-connection.window.js b/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-closed-websocket-connection.window.js
new file mode 100644
index 00000000000..30b8e63a2cd
--- /dev/null
+++ b/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-closed-websocket-connection.window.js
@@ -0,0 +1,20 @@
+// META: title=Testing BFCache support for page with closed WebSocket connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=/websockets/constants.sub.js
+// META: script=resources/websockets-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openThenCloseWebSocket(rc1);
+  // The page should be eligible for BFCache because the WebSocket connection has been closed.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ true);
+});
diff --git a/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-open-websocket-connection.window.js b/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-open-websocket-connection.window.js
new file mode 100644
index 00000000000..2baf38f303c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/websockets/back-forward-cache-with-open-websocket-connection.window.js
@@ -0,0 +1,21 @@
+// META: title=Testing BFCache support for page with open WebSocket connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=/websockets/constants.sub.js
+// META: script=resources/websockets-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openWebSocket(rc1);
+  // The page should not be eligible for BFCache because of open WebSocket connection.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ false);
+  await assertNotRestoredFromBFCache(rc1, ['WebSocket']);
+});
diff --git a/tests/wpt/web-platform-tests/websockets/resources/websockets-test-helpers.sub.js b/tests/wpt/web-platform-tests/websockets/resources/websockets-test-helpers.sub.js
new file mode 100644
index 00000000000..2680670cc69
--- /dev/null
+++ b/tests/wpt/web-platform-tests/websockets/resources/websockets-test-helpers.sub.js
@@ -0,0 +1,25 @@
+// The file including this must also include `/websockets/constants.sub.js to
+// pick up the necessary constants.
+
+// Opens a new WebSocket connection.
+async function openWebSocket(remoteContextHelper) {
+  let return_value = await remoteContextHelper.executeScript((domain) => {
+    return new Promise((resolve) => {
+      var webSocketInNotRestoredReasonsTests = new WebSocket(domain + '/echo');
+      webSocketInNotRestoredReasonsTests.onopen = () => { resolve(42); };
+    });
+  }, [SCHEME_DOMAIN_PORT]);
+  assert_equals(return_value, 42);
+}
+
+// Opens a new WebSocket connection and then close it.
+async function openThenCloseWebSocket(remoteContextHelper) {
+  let return_value = await remoteContextHelper.executeScript((domain) => {
+    return new Promise((resolve) => {
+      var testWebSocket = new WebSocket(domain + '/echo');
+      testWebSocket.onopen = () => { testWebSocket.close() };
+      testWebSocket.onclose = () => { resolve(42) };
+    });
+  }, [SCHEME_DOMAIN_PORT]);
+  assert_equals(return_value, 42);
+}
diff --git a/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-closed-webtransport-connection.https.window.js b/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-closed-webtransport-connection.https.window.js
new file mode 100644
index 00000000000..5cc7e93a2e1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-closed-webtransport-connection.https.window.js
@@ -0,0 +1,20 @@
+// META: title=Testing BFCache support for page with closed WebTransport connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=resources/webtransport-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openThenCloseWebTransport(rc1);
+  // The page should be eligible for BFCache because the WebTransport connection is closed.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ true);
+});
diff --git a/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-open-webtransport-connection.https.window.js b/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-open-webtransport-connection.https.window.js
new file mode 100644
index 00000000000..5d5143ae1a4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webtransport/back-forward-cache-with-open-webtransport-connection.https.window.js
@@ -0,0 +1,25 @@
+// META: title=Testing BFCache support for page with open WebTransport connection.
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+// META: script=resources/webtransport-test-helpers.sub.js
+
+'use strict';
+
+promise_test(async t => {
+  const rcHelper = new RemoteContextHelper();
+
+  // Open a window with noopener so that BFCache will work.
+  const rc1 = await rcHelper.addWindow(
+      /*config=*/ null, /*options=*/ { features: 'noopener' });
+  await openWebTransport(rc1);
+  // The page should be eligible for BFCache and the WebTransport connection
+  // should be closed.
+  await assertBFCacheEligibility(rc1, /*shouldRestoreFromBFCache=*/ true);
+  await rc1.executeScript(async () => {
+    assert_false(window.testWebTransport === undefined);
+    await window.testWebTransport.closed;
+  });
+});
diff --git a/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js b/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
index 9f9127b22f9..36788699e8b 100644
--- a/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
+++ b/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
@@ -110,3 +110,24 @@ async function readInto(reader, buffer) {
 
   return buffer;
 }
+
+// Opens a new WebTransport connection.
+async function openWebTransport(remoteContextHelper) {
+  const url = webtransport_url('custom-response.py?:status=200');
+  await remoteContextHelper.executeScript((url) => {
+    window.testWebTransport = new WebTransport(url);
+    return window.testWebTransport.ready;
+  }, [url]);
+}
+
+// Opens a new WebTransport connection and then close it.
+async function openThenCloseWebTransport(remoteContextHelper) {
+  const url = webtransport_url('custom-response.py?:status=200');
+  await remoteContextHelper.executeScript((url) => {
+    window.testWebTransport = new WebTransport(url);
+    return window.testWebTransport.ready.then(async () => {
+      window.testWebTransport.close();
+      await window.testWebTransport.closed;
+    });
+  }, [url]);
+}
diff --git a/tests/wpt/web-platform-tests/xhr/send-authentication-basic-cors-not-enabled.htm b/tests/wpt/web-platform-tests/xhr/send-authentication-basic-cors-not-enabled.htm
index 2e7cbaf0340..41201960cc3 100644
--- a/tests/wpt/web-platform-tests/xhr/send-authentication-basic-cors-not-enabled.htm
+++ b/tests/wpt/web-platform-tests/xhr/send-authentication-basic-cors-not-enabled.htm
@@ -5,6 +5,7 @@
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/common/utils.js"></script>
+    <script src="/common/get-host-info.sub.js"></script>
     <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol[1]/li[9]/ol[1]/li[1] following::ol[1]/li[9]/ol[1]/li[2]" />
     <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following::code[contains(@title,'http-authorization')]/.." />
   </head>
@@ -13,10 +14,10 @@
     <script>
       test(function() {
         var client = new XMLHttpRequest(),
-          urlstart = 'www1.'+location.host + location.pathname.replace(/\/[^\/]*$/, '/')
+          urlstart = get_host_info().REMOTE_ORIGIN + location.pathname.replace(/\/[^\/]*$/, '/')
         client.withCredentials = true
         user = token()
-        client.open("GET", location.protocol+'//'+urlstart + "resources/auth10/auth.py", false, user, 'pass')
+        client.open("GET", urlstart + "resources/auth10/auth.py", false, user, 'pass')
         client.setRequestHeader("x-user", user)
         assert_throws_dom("NetworkError", function(){ client.send(null) })
         assert_equals(client.responseText, '')
diff --git a/tests/wpt/web-platform-tests/xhr/send-authentication-cors-basic-setrequestheader.htm b/tests/wpt/web-platform-tests/xhr/send-authentication-cors-basic-setrequestheader.htm
index de9c5e54303..3c488dcad42 100644
--- a/tests/wpt/web-platform-tests/xhr/send-authentication-cors-basic-setrequestheader.htm
+++ b/tests/wpt/web-platform-tests/xhr/send-authentication-cors-basic-setrequestheader.htm
@@ -5,15 +5,16 @@
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/common/utils.js"></script>
+    <script src="/common/get-host-info.sub.js"></script>
   </head>
   <body>
     <div id="log"></div>
     <script>
       async_test(test => {
         var client = new XMLHttpRequest(),
-            urlstart = location.host + location.pathname.replace(/\/[^\/]*$/, '/'),
+            urlstart = get_host_info().REMOTE_ORIGIN + location.pathname.replace(/\/[^\/]*$/, '/'),
             user = token()
-        client.open("GET", location.protocol+'//www1.'+urlstart + "resources/auth2/corsenabled.py", false)
+        client.open("GET", urlstart + "resources/auth2/corsenabled.py", false)
         client.withCredentials = true
         client.setRequestHeader("x-user", user)
         client.setRequestHeader("x-pass", 'pass')
diff --git a/tests/wpt/web-platform-tests/xhr/send-authentication-cors-setrequestheader-no-cred.htm b/tests/wpt/web-platform-tests/xhr/send-authentication-cors-setrequestheader-no-cred.htm
index 14edf5bd778..eed619c1efb 100644
--- a/tests/wpt/web-platform-tests/xhr/send-authentication-cors-setrequestheader-no-cred.htm
+++ b/tests/wpt/web-platform-tests/xhr/send-authentication-cors-setrequestheader-no-cred.htm
@@ -5,6 +5,7 @@
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <script src="/common/utils.js"></script>
+    <script src="/common/get-host-info.sub.js"></script>
     <!-- These spec references do not make much sense simply because the spec doesn't say very much about this.. -->
     <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="following::ol[1]/li[6]" />
     <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following::code[contains(@title,'http-authorization')]/.." />
@@ -16,9 +17,9 @@
       var test = async_test(desc)
       test.step(function() {
         var client = new XMLHttpRequest(),
-            urlstart = location.host + location.pathname.replace(/\/[^\/]*$/, '/'),
+            urlstart = get_host_info().REMOTE_ORIGIN + location.pathname.replace(/\/[^\/]*$/, '/'),
             user = token()
-        client.open("GET", location.protocol + "//www1." + urlstart + "resources/" + pathsuffix, false)
+        client.open("GET", urlstart + "resources/" + pathsuffix, false)
         client.setRequestHeader("x-user", user)
         client.setRequestHeader("x-pass", 'pass')
         client.setRequestHeader("Authorization", "Basic " + btoa(user + ":pass"))
diff --git a/tests/wpt/web-platform-tests/xhr/send-network-error-sync-events.sub.htm b/tests/wpt/web-platform-tests/xhr/send-network-error-sync-events.sub.htm
index 2266eb36e1e..8011c58bdd1 100644
--- a/tests/wpt/web-platform-tests/xhr/send-network-error-sync-events.sub.htm
+++ b/tests/wpt/web-platform-tests/xhr/send-network-error-sync-events.sub.htm
@@ -17,7 +17,7 @@
         {
             var xhr = new XMLHttpRequest();
 
-            xhr.open("POST", "http://nonexistent.{{host}}:{{ports[http][0]}}", false);
+            xhr.open("POST", "http://{{host}}:1", false); // Bad port.
 
             assert_throws_dom("NetworkError", function()
             {