Auto merge of #27722 - servo-wpt-sync:wpt_update_27-10-2020, r=servo-wpt-sync

Sync WPT with upstream (27-10-2020) Automated downstream sync of changes from upstream as of 27-10-2020. [no-wpt-sync] r? @servo-wpt-sync
2025-08-06 14:10:11 +01:00 · 2020-10-27 09:19:31 -04:00 · 2020-10-27 09:19:31 -04:00 · 80570dafdd
commit 80570dafdd
parent 19ab519564 5961dbed05
71 changed files with 968 additions and 189 deletions
--- a/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini
@ -4,7 +4,7 @@
    expected: TIMEOUT

  [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT

  [Fetching a blob URL immediately before revoking it works in an iframe.]
    expected: FAIL
--- a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-002.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-002.html.ini
@ -0,0 +1,4 @@
+[hit-test-floats-002.html]
+  [Hit test float]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-004.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-004.html.ini
@ -1,4 +0,0 @@
-[hit-test-floats-004.html]
-  [Miss float below something else]
-    expected: FAIL
-
--- a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-005.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-005.html.ini
@ -1,4 +0,0 @@
-[hit-test-floats-005.html]
-  [Miss clipped float]
-    expected: FAIL
-
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
@ -0,0 +1,4 @@
+[CaretPosition-001.html]
+  [Element at (400, 100)]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/scroll-overflow-clip-quirks-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/scroll-overflow-clip-quirks-001.html.ini
@ -0,0 +1,4 @@
+[scroll-overflow-clip-quirks-001.html]
+  [CSSOM scrollingElement reflects the propagated scroll to viewport correctly]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/scroll-overflow-clip-quirks-002.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/scroll-overflow-clip-quirks-002.html.ini
@ -0,0 +1,4 @@
+[scroll-overflow-clip-quirks-002.html]
+  [CSSOM scrollingElement reflects the propagated scroll to viewport correctly]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
@ -315,24 +315,21 @@
  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
    expected: FAIL

-  [<iframe>: combined response Content-Type: text/html */*]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html */*]
-    expected: FAIL
-
-  [<iframe>: combined response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
    expected: FAIL

  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
    expected: FAIL

-  [<iframe>: separate response Content-Type: text/plain */*]
-    expected: FAIL
-
  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
    expected: FAIL

+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
@ -56,3 +56,6 @@
  [separate text/javascript x/x]
    expected: FAIL

+  [separate text/javascript ]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
@ -11,3 +11,6 @@
  [X-Content-Type-Options%3A%20nosniff%2C%2C%40%23%24%23%25%25%26%5E%26%5E*()()11!]
    expected: FAIL

+  [X-Content-Type-Options%3A%20no%0D%0AX-Content-Type-Options%3A%20nosniff]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
@ -0,0 +1,4 @@
+[traverse_the_history_3.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
@ -1,5 +1,4 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
  [opener of discarded nested browsing context]
    expected: FAIL

--- a/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@ -1,16 +1,17 @@
 [supported-elements.html]
+  expected: TIMEOUT
  [Contenteditable element should support autofocus]
    expected: FAIL

  [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: FAIL
+    expected: NOTRUN

  [Element with tabindex should support autofocus]
    expected: FAIL

  [Area element should support autofocus]
-    expected: FAIL
+    expected: NOTRUN

  [Host element with delegatesFocus should support autofocus]
-    expected: FAIL
+    expected: TIMEOUT

--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@ -1,5 +1,4 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: TIMEOUT
  [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL

--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-2.html]
-  expected: TIMEOUT
+  expected: CRASH
  [Check that popups from a sandboxed iframe do not escape the sandbox]
    expected: NOTRUN

--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
@ -1,4 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
-
--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
@ -0,0 +1,4 @@
+[module-static-import-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@ -3,6 +3,3 @@
  [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
    expected: TIMEOUT

-  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
-    expected: FAIL
-
--- a/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@ -1,4 +1,5 @@
 [realtimeanalyser-fft-scaling.html]
+  expected: TIMEOUT
  [X 2048-point FFT peak position is not equal to 64. Got 0.]
    expected: FAIL

--- a/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@ -197,3 +197,9 @@
  [X SNR (-529.35563055275 dB) is not greater than or equal to 65.737. Got -529.35563055275.]
    expected: FAIL

+  [X SNR (-481.3741499669012 dB) is not greater than or equal to 65.737. Got -481.3741499669012.]
+    expected: FAIL
+
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[28696\]\t1.7394493830210567e+26\t9.3139332532882690e-1\t1.7394493830210567e+26\t1.8675776771397270e+26\t3.8985999999999999e-3\n\t[28697\]\t7.0477002859115601e-1\t9.0675884485244751e-1\t2.0198881626129150e-1\t2.2275913536212616e-1\t3.8985999999999999e-3\n\tMax AbsError of 1.7394493830210567e+26 at index of 28696.\n\tMax RelError of 1.8675776771397270e+26 at index of 28696.\n]
+    expected: FAIL
+
--- a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
+++ b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
@ -0,0 +1,5 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
+
--- a/tests/wpt/metadata-layout-2020/workers/WorkerGlobalScope-close.html.ini
+++ b/tests/wpt/metadata-layout-2020/workers/WorkerGlobalScope-close.html.ini
@ -1,4 +0,0 @@
-[WorkerGlobalScope-close.html]
-  [Test sending a message after closing.]
-    expected: FAIL
-
--- a/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
+++ b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@ -7,7 +7,7 @@
    expected: FAIL

  [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT

  [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
    expected: TIMEOUT
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@ -127979,6 +127979,19 @@
       {}
      ]
     ],
+     "out-of-flow-in-multicolumn-002.html": [
+      "bc91fe11c6975eb6ea9fbe274a0a93d596efff5f",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
     "overflowed-block-with-no-room-after-000.html": [
      "084e16fb38de072fb83f92ba01302a2e404cdd97",
      [
@ -128070,6 +128083,19 @@
       {}
      ]
     ],
+     "relpos-inline.html": [
+      "a296f0ae7eb04e0b7fee52f9da9da84ff9ddd884",
+      [
+       null,
+       [
+        [
+         "/css/css-break/relpos-inline-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
     "tall-break-inside-avoid-at-start.html": [
      "6e9ab8bd9f56502247a6d8c2c2045b8f3af3605d",
      [
@ -250040,7 +250066,7 @@
     ],
     "reftests": {
      "display-none-mask.html": [
-       "5a746c9fdaec71c5c530e393aaa1f641f55c89b8",
+       "a6aa6007574ff6c3b2930fd15b6e51d65a633c7e",
       [
        null,
        [
@ -299958,7 +299984,11 @@
       "06108ac800c19c68841f2a0e8867fb05e868c1ab",
       []
      ]
-     }
+     },
+     "relpos-inline-ref.html": [
+      "8c19f1cf4c6c0173b45face28d624368d365ec70",
+      []
+     ]
    },
    "css-cascade": {
     "META.yml": [
@ -345015,6 +345045,10 @@
        "62c141d960d27dc59666538b2ec0f185f59c9468",
        []
       ],
+       "input-types.js": [
+        "44567510523622ff06f3ffccdd26cd44f864f372",
+        []
+       ],
       "multiline-placeholder-ref.html": [
        "2812f86e1e6c8e240f60ff313e856b6733e54b5e",
        []
@ -358879,7 +358913,7 @@
     ],
     "reftests": {
      "display-none-mask-ref.html": [
-       "7835597d961a9c9feb0fff92b0f651e164456c12",
+       "3739265b23d22e39f2e2acdc90d94c583b36f4f9",
       []
      ],
      "marker-path-001-ref.svg": [
@ -366154,7 +366188,7 @@
      ]
     },
     "requirements.txt": [
-      "1eba114a31c21f3e48aafae5e9466cefbe741288",
+      "7567e81ada590486bda300e484564700c373d11a",
      []
     ],
     "requirements_android_webview.txt": [
@ -368773,7 +368807,7 @@
     []
    ],
    "helpers.js": [
-     "c355d0586257b802c3f4a401c7ddedad16c860f9",
+     "620feebd2999ac71fe06d73e7b0cda4ec5d855fe",
     []
    ],
    "resources": {
@ -400381,6 +400415,13 @@
       ]
      ]
     },
+     "relpos-inline-hit-testing.html": [
+      "ca0c961ca22b3ac7fac7f25f21085ceb220dfddc",
+      [
+       null,
+       {}
+      ]
+     ],
     "remove-inline-child.html": [
      "64f4d0b1ac224b3386e915f31bedd70d718a5528",
      [
@ -422095,6 +422136,20 @@
       {}
      ]
     ],
+     "scroll-overflow-clip-quirks-001.html": [
+      "ae70083ac32af4e89dc15d6dca9192c827f36ac3",
+      [
+       null,
+       {}
+      ]
+     ],
+     "scroll-overflow-clip-quirks-002.html": [
+      "8909125649a0f8731898d203593d591f8b2da41b",
+      [
+       null,
+       {}
+      ]
+     ],
     "scrollIntoView-horizontal-partially-visible.html": [
      "1e8bc50071f080a89b9e19bbad9f6c4fbda1cc29",
      [
@ -422243,7 +422298,7 @@
      ]
     ],
     "scrollingElement.html": [
-      "84d313741ce88f5e3ae77e5c85f79a88348caddc",
+      "408fa47be9a3330aff88ef01e9b8be90fd4008ce",
      [
       null,
       {}
@ -470864,6 +470919,13 @@
         {}
        ]
       ],
+       "fieldset-content-percentage-size.html": [
+        "6195d8bb0527b5d3e72e57c41da32bfe2aa4bb50",
+        [
+         null,
+         {}
+        ]
+       ],
       "fieldset-default-style.html": [
        "f07c84f406cefc7054e8a13c2796d3d82673bdf7",
        [
@ -477481,6 +477543,15 @@
         {}
        ]
       ],
+       "selection-pointer.html": [
+        "8ad1f578215773a072304108e528c96afafd2797",
+        [
+         null,
+         {
+          "testdriver": true
+         }
+        ]
+       ],
       "selection.html": [
        "42c40108d92716ca263323389d05c5480703b393",
        [
@ -489560,7 +489631,7 @@
       ]
      ],
      "attribute-mapping-002.html": [
-       "e4532321e4a5b20944ff4181b2ad9b967ee31213",
+       "1fe9b34f98189c12683e13df931f63c572e00fdf",
       [
        null,
        {}
@ -518868,7 +518939,7 @@
      ]
     ],
     "general.any.js": [
-      "bd18973b41315d1bdbf3f242d6c09f821c867f3f",
+      "2e02dfad78a0fa0f74d916075a2d87bf8430e2f5",
      [
       null,
       {
@ -536313,7 +536384,7 @@
     ]
    ],
    "createcredential-extensions.https.html": [
-     "46cab3051b4924a2cb9cf1d7a2df46046b7b2f23",
+     "64690e7c506bb77ad260fe8606d499e2e1fb9b23",
     [
      null,
      {
@ -536332,6 +536403,26 @@
      }
     ]
    ],
+    "createcredential-large-blob-not-supported.https.html": [
+     "1a320d54d156baf0cd55f32c3154331f6ce958e3",
+     [
+      null,
+      {
+       "testdriver": true,
+       "timeout": "long"
+      }
+     ]
+    ],
+    "createcredential-large-blob-supported.https.html": [
+     "46623de77476141fb4adf72e3b63ddc62d34489b",
+     [
+      null,
+      {
+       "testdriver": true,
+       "timeout": "long"
+      }
+     ]
+    ],
    "createcredential-passing.https.html": [
     "30fef13bbdc9efb5659460652054d119399ce819",
     [
@ -536392,6 +536483,26 @@
      }
     ]
    ],
+    "getcredential-large-blob-not-supported.https.html": [
+     "26e91d8f4f632fe9f396e9758421f3131b4e8633",
+     [
+      null,
+      {
+       "testdriver": true,
+       "timeout": "long"
+      }
+     ]
+    ],
+    "getcredential-large-blob-supported.https.html": [
+     "02aea568173a317e76ce0516f06d2a5d675a7252",
+     [
+      null,
+      {
+       "testdriver": true,
+       "timeout": "long"
+      }
+     ]
+    ],
    "getcredential-passing.https.html": [
     "1af35aa9cb14327d3d1d4ea660b7380d6b0f65bd",
     [
@ -536482,7 +536593,7 @@
     ]
    ],
    "video-decoder.html": [
-     "33c478d0090775bee319c6f30710bfdedad7bc86",
+     "f653ba03b09a51b9e25b90173b4d7002242e05e7",
     [
      null,
      {}
@ -538724,7 +538835,7 @@
     ]
    ],
    "RTCPeerConnection-insertable-streams-audio.https.html": [
-     "3d419b2b9a792fe7e732309f81e64716146cd683",
+     "04282d0942cc1f8b733d9a48cab3a77a264b7f34",
     [
      null,
      {}
@ -538766,7 +538877,7 @@
     ]
    ],
    "RTCPeerConnection-insertable-streams-worker.https.html": [
-     "a21a0d90e55cbcc1ca912b88cfa61d038688e1fc",
+     "04c9c106b873058176298d8deca1cad06ffc8049",
     [
      null,
      {}
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
@ -0,0 +1,4 @@
+[hit-test-floats-002.html]
+  [Hit test float]
+    expected: FAIL
+
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
@ -1,4 +0,0 @@
-[hit-test-floats-004.html]
-  [Miss float below something else]
-    expected: FAIL
-
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
@ -1,4 +0,0 @@
-[hit-test-floats-005.html]
-  [Miss clipped float]
-    expected: FAIL
-
--- a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
@ -0,0 +1,4 @@
+[CaretPosition-001.html]
+  [Element at (400, 100)]
+    expected: FAIL
+
--- a/tests/wpt/metadata/css/cssom-view/scroll-overflow-clip-quirks-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/scroll-overflow-clip-quirks-001.html.ini
@ -0,0 +1,4 @@
+[scroll-overflow-clip-quirks-001.html]
+  [CSSOM scrollingElement reflects the propagated scroll to viewport correctly]
+    expected: FAIL
+
--- a/tests/wpt/metadata/css/cssom-view/scroll-overflow-clip-quirks-002.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/scroll-overflow-clip-quirks-002.html.ini
@ -0,0 +1,4 @@
+[scroll-overflow-clip-quirks-002.html]
+  [CSSOM scrollingElement reflects the propagated scroll to viewport correctly]
+    expected: FAIL
+
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@ -315,24 +315,21 @@
  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
    expected: FAIL

-  [<iframe>: combined response Content-Type: text/html */*]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html */*]
-    expected: FAIL
-
-  [<iframe>: combined response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
    expected: FAIL

  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
    expected: FAIL

-  [<iframe>: separate response Content-Type: text/plain */*]
-    expected: FAIL
-
  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
    expected: FAIL

+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@ -56,3 +56,6 @@
  [separate text/javascript x/x]
    expected: FAIL

+  [separate text/javascript ]
+    expected: FAIL
+
--- a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
@ -11,3 +11,6 @@
  [X-Content-Type-Options%3A%20nosniff%2C%2C%40%23%24%23%25%25%26%5E%26%5E*()()11!]
    expected: FAIL

+  [X-Content-Type-Options%3A%20no%0D%0AX-Content-Type-Options%3A%20nosniff]
+    expected: FAIL
+
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
@ -0,0 +1,4 @@
+[traverse_the_history_3.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
+
--- a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
@ -1,5 +1,4 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
  [opener and "removed" embedded documents]
    expected: FAIL

--- 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
@ -1,4 +1,5 @@
 [supported-elements.html]
+  expected: TIMEOUT
  [Contenteditable element should support autofocus]
    expected: FAIL

@ -6,11 +7,11 @@
    expected: FAIL

  [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: FAIL
+    expected: NOTRUN

  [Area element should support autofocus]
-    expected: FAIL
+    expected: NOTRUN

  [Host element with delegatesFocus should support autofocus]
-    expected: FAIL
+    expected: TIMEOUT

--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@ -1,5 +1,4 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: TIMEOUT
  [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL

--- 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
@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-2.html]
  type: testharness
-  expected: TIMEOUT
+  expected: CRASH
  [Check that popups from a sandboxed iframe do not escape the sandbox]
    expected: NOTRUN

--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
@ -1,4 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
-
--- 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
@ -0,0 +1,4 @@
+[module-static-import-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
+
--- a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@ -4,6 +4,3 @@
  [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
    expected: TIMEOUT

-  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
-    expected: FAIL
-
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@ -1,4 +1,5 @@
 [realtimeanalyser-fft-scaling.html]
+  expected: TIMEOUT
  [X 2048-point FFT peak position is not equal to 64. Got 0.]
    expected: FAIL

--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@ -425,3 +425,9 @@
  [X SNR (-529.35563055275 dB) is not greater than or equal to 65.737. Got -529.35563055275.]
    expected: FAIL

+  [X SNR (-481.3741499669012 dB) is not greater than or equal to 65.737. Got -481.3741499669012.]
+    expected: FAIL
+
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[28696\]\t1.7394493830210567e+26\t9.3139332532882690e-1\t1.7394493830210567e+26\t1.8675776771397270e+26\t3.8985999999999999e-3\n\t[28697\]\t7.0477002859115601e-1\t9.0675884485244751e-1\t2.0198881626129150e-1\t2.2275913536212616e-1\t3.8985999999999999e-3\n\tMax AbsError of 1.7394493830210567e+26 at index of 28696.\n\tMax RelError of 1.8675776771397270e+26 at index of 28696.\n]
+    expected: FAIL
+
--- a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
+++ b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
@ -0,0 +1,5 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
+
--- a/tests/wpt/metadata/workers/WorkerGlobalScope-close.html.ini
+++ b/tests/wpt/metadata/workers/WorkerGlobalScope-close.html.ini
@ -1,4 +0,0 @@
-[WorkerGlobalScope-close.html]
-  [Test sending a message after closing.]
-    expected: FAIL
-
--- a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
+++ b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
--- a/tests/wpt/web-platform-tests/css/css-break/out-of-flow-in-multicolumn-002.html
+++ b/tests/wpt/web-platform-tests/css/css-break/out-of-flow-in-multicolumn-002.html
@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<link rel="help" href="href=https://www.w3.org/TR/css-break-3/#break-decoration">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<!-- Tests fragmentation when a positioned node's child overflows. -->
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<style>
+  #multicol {
+    column-count: 2;
+    column-fill: auto;
+    column-gap: 0px;
+    height: 100px;
+    width: 50px;
+  }
+  .rel {
+    position: relative;
+    width: 30px;
+  }
+  .abs {
+    position: absolute;
+    top: 0px;
+    width: 5px;
+    height: 10px;
+    background: green;
+  }
+</style>
+<div id="multicol">
+  <div class="rel">
+    <div class="abs">
+      <div style="background: green; width: 25px; height: 400px;"></div>
+    </div>
+  </div>
+  <div style="background-color: red; width: 20px; height: 140px;"></div>
+</div>
--- a/tests/wpt/web-platform-tests/css/css-break/relpos-inline-hit-testing.html
+++ b/tests/wpt/web-platform-tests/css/css-break/relpos-inline-hit-testing.html
@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#transforms">
+<link rel="help" href="https://www.w3.org/TR/CSS22/visuren.html#relative-positioning">
+<link rel="match" href="relpos-inline-ref.html">
+<style>
+  body {
+      margin: 8px;
+  }
+  #target {
+      position: relative;
+      left: -100px;
+      top: 100px;
+      border: 1px solid;
+      background: hotpink;
+  }
+</style>
+<div style="columns:4; column-gap:0; column-fill:auto; line-height:30px; width:600px; height:60px; orphans:1; widows:1;">
+  <br><br><br>
+  <span id="target">
+    line1<br>
+    line2<br>
+    line3<br>
+    line4<br>
+  </span>
+</div>
+<div id="log" style="margin-top:100px;"></div>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  test(()=> { assert_equals(document.elementFromPoint(58, 153), target); }, "line1");
+  test(()=> { assert_equals(document.elementFromPoint(208, 123), target); }, "line2");
+  test(()=> { assert_equals(document.elementFromPoint(208, 153), target); }, "line3");
+  test(()=> { assert_equals(document.elementFromPoint(358, 123), target); }, "line4");
+  test(()=> { assert_not_equals(document.elementFromPoint(58, 123), target); }, "Above line1");
+  test(()=> { assert_not_equals(document.elementFromPoint(358, 153), target); }, "Below line4");
+  test(()=> { assert_not_equals(document.elementFromPoint(158, 48), target); }, "line1 before offsetting");
+</script>
--- a/tests/wpt/web-platform-tests/css/css-break/relpos-inline-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-break/relpos-inline-ref.html
@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<style>
+  span {
+      position: relative;
+      left: -100px;
+      top: 100px;
+      border: 1px solid;
+      background:hotpink;
+  }
+  .fakecol {
+      float: left;
+      width: 150px;
+      height: 100%;
+  }
+</style>
+<div style="line-height:30px; height:60px;">
+  <div class="fakecol"></div>
+  <div class="fakecol">
+    <br>
+    <span style="border-right:none;">
+      line1<br>
+    </span>
+  </div>
+  <div class="fakecol">
+    <span style="border-left:none; border-right:none;">
+      line2<br>
+      line3<br>
+    </span>
+  </div>
+  <div class="fakecol">
+    <span style="border-left:none;">
+      line4<br>
+    </span>
+  </div>
+</div>
--- a/tests/wpt/web-platform-tests/css/css-break/relpos-inline.html
+++ b/tests/wpt/web-platform-tests/css/css-break/relpos-inline.html
@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#transforms">
+<link rel="help" href="https://www.w3.org/TR/CSS22/visuren.html#relative-positioning">
+<link rel="match" href="relpos-inline-ref.html">
+<div style="columns:4; column-gap:0; column-fill:auto; line-height:30px; width:600px; height:60px; orphans:1; widows:1;">
+  <br><br><br>
+  <span style="position:relative; left:-100px; top:100px; border:1px solid; background:hotpink;">
+    line1<br>
+    line2<br>
+    line3<br>
+    line4<br>
+  </span>
+</div>
--- a/tests/wpt/web-platform-tests/css/cssom-view/scroll-overflow-clip-quirks-001.html
+++ b/tests/wpt/web-platform-tests/css/cssom-view/scroll-overflow-clip-quirks-001.html
@ -0,0 +1,23 @@
+<!-- quirks -->
+<title>CSSOM scrollingElement reflects the propagated scroll to viewport correctly</title>
+<meta charset="utf-8">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://drafts.csswg.org/css-overflow/#overflow-propagation">
+<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/5601">
+<style>
+  :root {
+    overflow: clip;
+  }
+  body {
+    overflow: scroll;
+  }
+</style>
+<script>
+test(function() {
+  assert_equals(document.scrollingElement, null);
+});
+</script>
--- a/tests/wpt/web-platform-tests/css/cssom-view/scroll-overflow-clip-quirks-002.html
+++ b/tests/wpt/web-platform-tests/css/cssom-view/scroll-overflow-clip-quirks-002.html
@ -0,0 +1,20 @@
+<!-- quirks -->
+<title>CSSOM scrollingElement reflects the propagated scroll to viewport correctly</title>
+<meta charset="utf-8">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="help" href="https://drafts.csswg.org/css-overflow/#overflow-propagation">
+<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/5601">
+<style>
+  body {
+    overflow: clip;
+  }
+</style>
+<script>
+test(function() {
+  assert_equals(document.scrollingElement, document.body);
+});
+</script>
--- a/tests/wpt/web-platform-tests/css/cssom-view/scrollingElement.html
+++ b/tests/wpt/web-platform-tests/css/cssom-view/scrollingElement.html
@ -93,12 +93,16 @@ function nonQuirksTest(rootDisplay, bodyDisplay) {
      nonQuirksDoc.documentElement.style.display = rootDisplay;
      nonQuirksDoc.body.style.display = bodyDisplay;

-      // Tests for non-quirks mode document.
      assert_equals(nonQuirksDoc.scrollingElement, nonQuirksDoc.documentElement,
        "scrollingElement in standards mode should be the document element.");
-      nonQuirksDoc.documentElement.style.overflow = "scroll";
-      nonQuirksDoc.body.style.overflow = "scroll";
-      assert_equals(nonQuirksDoc.scrollingElement, nonQuirksDoc.documentElement);
+
+      for (let rootOverflow of ["", "clip", "scroll", "hidden", "visible"]) {
+        for (let bodyOverflow of ["", "clip", "scroll", "hidden", "visible"]) {
+          nonQuirksDoc.documentElement.style.overflow = rootOverflow;
+          nonQuirksDoc.body.style.overflow = bodyOverflow;
+          assert_equals(nonQuirksDoc.scrollingElement, nonQuirksDoc.documentElement);
+        }
+      }

      nonQuirksDoc.removeChild(nonQuirksDoc.documentElement);
      assert_equals(nonQuirksDoc.scrollingElement, null);
--- a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-content-percentage-size.html
+++ b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-content-percentage-size.html
@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<link rel="help" href="https://crbug.com/1140595">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div style="height:100px;">
+  <fieldset style="margin:0; padding:0; border:none;">
+    <div id="inner" style="height:59%;"></div>
+  </fieldset>
+</div>
+<script>
+test(() => {
+  let innerDiv = document.querySelector('#inner');
+  assert_equals(innerDiv.clientHeight, 0);
+}, 'A percentage height for an element in an auto-height fieldset should be ignored');
+</script>
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/input-types.js
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/input-types.js
@ -0,0 +1,24 @@
+export default [
+  "button",
+  "checkbox",
+  "color",
+  "date",
+  "datetime-local",
+  "email",
+  "file",
+  "hidden",
+  "image",
+  "month",
+  "number",
+  "password",
+  "radio",
+  "range",
+  "reset",
+  "search",
+  "submit",
+  "tel",
+  "text",
+  "time",
+  "url",
+  "week",
+];
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/selection-pointer.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/selection-pointer.html
@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Selecting texts across input element</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<link rel="stylesheet" href="/fonts/ahem.css" />
+<style>
+  .test {
+    font: 16px/1 Ahem;
+    padding-bottom: 16px;
+  }
+</style>
+<div class="test">
+  <span id="foo">foo</span><br>
+  <input id="input"><br>
+  <span id="bar">bar</span>
+</div>
+<script type="module">
+import inputTypes from "./input-types.js";
+
+const selection = getSelection();
+const inputVisibleTypes = inputTypes.filter(t => t !== "hidden");
+
+for (const inputType of inputVisibleTypes) {
+  promise_test(async () => {
+    input.type = inputType;
+    selection.collapse(foo);
+    await new test_driver.Actions()
+      .pointerMove(0, 0, {origin: foo})
+      .pointerDown()
+      .pointerMove(0, 0, {origin: input})
+      .pointerMove(0, 0, {origin: bar})
+      .pointerUp()
+      .send();
+    assert_equals(selection.anchorNode, foo.childNodes[0], "anchorNode");
+    assert_equals(selection.focusNode, bar.childNodes[0], "focusNode");
+  }, `Selecting texts across <input type=${inputType}> should not cancel selection`);
+}
+</script>
--- a/tests/wpt/web-platform-tests/mathml/relations/css-styling/attribute-mapping-002.html
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/attribute-mapping-002.html
@ -44,26 +44,52 @@

          test(function() {
              // none and mprescripts appear as scripts
-              assert_equals(style.getPropertyValue("math-depth"), tag === "none" || tag === "mprescripts" ? 1 : 0, "no attribute");
+              assert_equals(style.getPropertyValue("math-depth"), tag === "none" || tag === "mprescripts" ? "1" : "0", "no attribute");

              var absoluteScriptlevel = 2;
              element.setAttribute("scriptlevel", absoluteScriptlevel);
-              assert_equals(style.getPropertyValue("math-depth"), absoluteScriptlevel, "attribute specified (<U>)");
+              assert_equals(style.getPropertyValue("math-depth"), "" + absoluteScriptlevel, "attribute specified <U>");

              var positiveScriptlevelDelta = 1;
              element.setAttribute("scriptlevel", `+${positiveScriptlevelDelta}`);
-              assert_equals(style.getPropertyValue("math-depth"), positiveScriptlevelDelta, epsilon, "attribute specified (+<U>)");
+              assert_equals(style.getPropertyValue("math-depth"), "" + positiveScriptlevelDelta, "attribute specified +<U>");

              var negativeScriptlevelDelta = -3;
-      element.setAttribute("scriptlevel", negativeScriptlevelDelta);
-              assert_approx_equals(style.getPropertyValue("math-depth"), negativeScriptlevelDelta, "attribute specified (-<U>)");
+              element.setAttribute("scriptlevel", `${negativeScriptlevelDelta}`);
+              assert_equals(style.getPropertyValue("math-depth"), "" + negativeScriptlevelDelta, "attribute specified -<U>");

              element.setAttribute("scriptlevel", absoluteScriptlevel);
              element.setAttribute("mathsize", "42px");
-              assert_approx_equals(fontSize(style), 42, epsilon, "mathsize wins over scriptlevel");
+              assert_approx_equals(fontSize(style), 42, 1, "mathsize wins over scriptlevel");

          }, `scriptlevel on the ${tag} element is mapped to math-depth(...)`);

+          test(function() {
+              // none and mprescripts appear as scripts
+              let expected = 0;
+              element.setAttribute("scriptlevel", "" + expected);
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "no attribute");
+
+              element.setAttribute("scriptlevel", " +1");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+              element.setAttribute("scriptlevel", " + 1");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+              element.setAttribute("scriptlevel", "2.0");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+              element.setAttribute("scriptlevel", "-3\"");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+              element.setAttribute("scriptlevel", "200px");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+              element.setAttribute("scriptlevel", "add(2)");
+              assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
+
+          }, `invalid scriptlevel values on the ${tag} element are not mapped to math-depth(...)`);
+
          test(function() {
              assert_equals(style.getPropertyValue("math-style"), "compact", "no attribute");
              element.setAttribute("displaystyle", "true");
--- a/tests/wpt/web-platform-tests/streams/piping/general.any.js
+++ b/tests/wpt/web-platform-tests/streams/piping/general.any.js
@ -198,3 +198,14 @@ promise_test(t => {
    }
  }), 'pipeTo should reject');
 }, 'pipeTo() should reject if an option getter grabs a writer');
+
+promise_test(t => {
+  const rs = new ReadableStream({
+    start(controller) {
+      controller.close();
+    }
+  });
+  const ws = new WritableStream();
+
+  return rs.pipeTo(ws, null);
+}, 'pipeTo() promise should resolve if null is passed');
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/display-none-mask-ref.html
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/display-none-mask-ref.html
@ -8,12 +8,12 @@
 <body>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px; background: red"></div>
+      <div style="width: 200px; height: 200px;"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px; background: red"></div>
+      <div style="width: 200px; height: 200px; background: green"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
@ -23,28 +23,28 @@
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px;"></div>
+      <div style="width: 200px; height: 200px; background: green"></div>
    </foreignObject>
  </svg>

  <!-- make sure masking actually works -->
  <svg width="200" height="200">
-      <rect x="0" y="0" width="100" height="50" fill="red"></rect>
-      <rect x="0" y="100" width="100" height="50" fill="red"></rect>
+      <rect x="0" y="0" width="100" height="50" fill="green"></rect>
+      <rect x="0" y="100" width="100" height="50" fill="green"></rect>
  </svg>
  <svg width="200" height="200">
-      <rect x="0" y="0" width="100" height="50" fill="red"></rect>
-      <rect x="0" y="100" width="100" height="50" fill="red"></rect>
+      <rect x="0" y="0" width="100" height="50" fill="green"></rect>
+      <rect x="0" y="100" width="100" height="50" fill="green"></rect>
  </svg>

  <!-- make sure masking works on active content -->
  <svg width="200" height="200">
-    <rect x="0" y="0" width="100" height="50" fill="red"></rect>
-    <rect x="0" y="100" width="100" height="50" fill="red"></rect>
+    <rect x="0" y="0" width="100" height="50" fill="green"></rect>
+    <rect x="0" y="100" width="100" height="50" fill="green"></rect>
  </svg>
  <svg width="200" height="200">
-    <rect x="0" y="0" width="100" height="50" fill="red"></rect>
-    <rect x="0" y="100" width="100" height="50" fill="red"></rect>
+    <rect x="0" y="0" width="100" height="50" fill="green"></rect>
+    <rect x="0" y="100" width="100" height="50" fill="green"></rect>
  </svg>
 </body>
 </html>
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/display-none-mask.html
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/display-none-mask.html
@ -3,28 +3,39 @@

 <head>
  <meta charset="UTF-8">
-  <link rel="match"  href="display-none-mask-ref.html" />
+  <title>Mask behaviour when mask image is missing or display:none</title>
+  <link rel="match"  href="display-none-mask-ref.html">
+  <link name="author" title="Timothy Nikkel" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1624532">
+  <link name="author" title="Mike Bremford" href="http://bfo.com"> <!-- edited 202010 -->
+  <link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-image">
+  <link rel="help" href="https://drafts.fxtf.org/css-masking-1/#MaskElement">
+  <link rel="help" href="https://github.com/w3c/fxtf-drafts/issues/245">
+  <meta name="assert" content="A missing or invalid mask image is equivalent to transparent black (i.e. nothing is displayed). A mask with display:none is disabled (which is a change to the specified behaviour as of issue 245)">
 </head>

 <body>
  <svg width="200" height="200">
+    <!-- missing/invalid mask is equivalent to transparent black - nothing displayed -->
    <foreignObject x="0" y="0" width="200" height="200" style="mask: url('#notfound');">
      <div style="width: 200px; height: 200px; background: red"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
+    <!-- display:none on mask means mask is not applied (new in https://github.com/w3c/fxtf-drafts/issues/245) -->
    <foreignObject x="0" y="0" width="200" height="200" style="mask: url('#noneMask');">
-      <div style="width: 200px; height: 200px; background: red"></div>
+      <div style="width: 200px; height: 200px; background: green"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
+      <!-- missing/invalid mask is equivalent to transparent black - nothing displayed -->
      <div style="width: 200px; height: 200px; background: red; mask: url('#notfound');"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px; background: red; mask: url('#noneMask');"></div>
+      <!-- display:none on mask means mask is not applied (new in https://github.com/w3c/fxtf-drafts/issues/245) -->
+      <div style="width: 200px; height: 200px; background: green; mask: url('#noneMask');"></div>
    </foreignObject>
  </svg>

@ -45,24 +56,24 @@
      </mask>
    </defs>
    <foreignObject x="0" y="0" width="200" height="200" style="mask: url('#aMask');">
-      <div style="width: 200px; height: 200px; background: red;"></div>
+      <div style="width: 200px; height: 200px; background: green;"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px; background: red; mask: url('#aMask');"></div>
+      <div style="width: 200px; height: 200px; background: green; mask: url('#aMask');"></div>
    </foreignObject>
  </svg>

  <!-- make sure masking works on active content -->
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200" style="mask: url('#aMask');">
-      <div style="width: 200px; height: 200px; background: red; will-change: transform"></div>
+      <div style="width: 200px; height: 200px; background: green; will-change: transform"></div>
    </foreignObject>
  </svg>
  <svg width="200" height="200">
    <foreignObject x="0" y="0" width="200" height="200">
-      <div style="width: 200px; height: 200px; background: red; will-change: transform; mask: url('#aMask');"></div>
+      <div style="width: 200px; height: 200px; background: green; will-change: transform; mask: url('#aMask');"></div>
    </foreignObject>
  </svg>
 </body>
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
@ -3,7 +3,8 @@ mozinfo==1.2.1  # https://bugzilla.mozilla.org/show_bug.cgi?id=1621226
 mozlog==6.1
 mozdebug==0.2
 # Pillow 7 requires Python 3
-pillow==6.2.2  # pyup: <7.0
+pillow==6.2.2; python_version <= '2.7'  # pyup: <7.0
+pillow==8.0.1; python_version >= '3.0'
 urllib3[secure]==1.25.10
 requests==2.24.0
 six==1.15.0
--- a/tests/wpt/web-platform-tests/webauthn/createcredential-extensions.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/createcredential-extensions.https.html
@ -23,28 +23,14 @@ standardSetup(function() {
    new CreateCredentialsTest("options.publicKey.extensions", "hi mom").runTest("Bad extensions: extensions is string", TypeError);

    // phony extensions
-    // TODO: not sure if this should pass or fail
-    // should be clarified as part of https://github.com/w3c/webauthn/pull/765
    var randomExtId = {};
    randomExtId[createRandomString(64)] = dummyExtension;
    new CreateCredentialsTest("options.publicKey.extensions", {foo: JSON.stringify(randomExtId)}).runTest("extensions is a nonsensical JSON string");

-    // Defined extensions.
-
    // appid
    new CreateCredentialsTest("options.publicKey.extensions", {appid: ""}).runTest("empty appid in create request", "NotSupportedError");
    new CreateCredentialsTest("options.publicKey.extensions", {appid: null}).runTest("null appid in create request", "NotSupportedError");
    new CreateCredentialsTest("options.publicKey.extensions", {appid: "anything"}).runTest("appid in create request", "NotSupportedError");
-
-    // TODO
-    // defined extensions:
-    // * txAuthSimple
-    // * txAuthGeneric
-    // * authnSel
-    // * exts
-    // * uvi
-    // * loc
-    // * uvm
 });

 /* JSHINT */
--- a/tests/wpt/web-platform-tests/webauthn/createcredential-large-blob-not-supported.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/createcredential-large-blob-not-supported.https.html
@ -0,0 +1,78 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>navigator.credentials.create() largeBlob extension tests with no authenticator support</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src=helpers.js></script>
+<body></body>
+<script>
+standardSetup(function() {
+  "use strict";
+
+  new CreateCredentialsTest("options.publicKey.extensions", {
+    largeBlob: {
+      write: new ArrayBuffer(),
+    },
+  }).runTest("navigator.credentials.create() with largeBlob.write set", "NotSupportedError");
+
+  new CreateCredentialsTest("options.publicKey.extensions", {
+    largeBlob: {
+      read: true,
+    },
+  }).runTest("navigator.credentials.create() with largeBlob.read set", "NotSupportedError");
+
+  promise_test(async t => {
+    const credential = await createCredential({
+      options: {
+        publicKey: {
+          authenticatorSelection: {
+            requireResidentKey: true,
+          },
+          extensions: {
+            largeBlob: {
+              support: "preferred",
+            },
+          },
+        },
+      },
+    });
+    assert_own_property(credential.getClientExtensionResults(), "largeBlob");
+    assert_false(credential.getClientExtensionResults().largeBlob.supported);
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.create() with largeBlob.support set to preferred and not supported by authenticator");
+
+  promise_test(async t => {
+    const credential = await createCredential({
+      options: {
+        publicKey: {
+          authenticatorSelection: {
+            requireResidentKey: true,
+          },
+          extensions: {
+            largeBlob: {},
+          },
+        },
+      },
+    });
+    assert_own_property(credential.getClientExtensionResults(), "largeBlob");
+    assert_false(credential.getClientExtensionResults().largeBlob.supported);
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.create() with largeBlob.support not set and not supported by authenticator");
+
+  new CreateCredentialsTest("options.publicKey.extensions", {
+    largeBlob: {
+      support: "required"
+    },
+  }).runTest("navigator.credentials.create() with largeBlob.support set to required and not supported by authenticator", "NotAllowedError");
+}, {
+  protocol: "ctap2",
+  hasResidentKey: true,
+  hasUserVerification: true,
+  isUserVerified: true,
+});
+</script>
--- a/tests/wpt/web-platform-tests/webauthn/createcredential-large-blob-supported.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/createcredential-large-blob-supported.https.html
@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>navigator.credentials.create() largeBlob extension tests with authenticator support</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src=helpers.js></script>
+<body></body>
+<script>
+standardSetup(function() {
+  "use strict";
+
+  promise_test(async t => {
+    const credential = await createCredential({
+      options: {
+        publicKey: {
+          authenticatorSelection: {
+            requireResidentKey: true,
+          },
+          extensions: {
+            largeBlob: {
+              support: "preferred",
+            },
+          },
+        },
+      },
+    });
+    assert_own_property(credential.getClientExtensionResults(), "largeBlob");
+    assert_true(credential.getClientExtensionResults().largeBlob.supported);
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.create() with largeBlob.support set to preferred and supported by authenticator");
+
+  promise_test(async t => {
+    const credential = await createCredential({
+      options: {
+        publicKey: {
+          authenticatorSelection: {
+            requireResidentKey: true,
+          },
+          extensions: {
+            largeBlob: {},
+          },
+        },
+      },
+    });
+    assert_own_property(credential.getClientExtensionResults(), "largeBlob");
+    assert_true(credential.getClientExtensionResults().largeBlob.supported);
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.create() with largeBlob.support not set and supported by authenticator");
+
+  promise_test(async t => {
+    const credential = await createCredential({
+      options: {
+        publicKey: {
+          authenticatorSelection: {
+            requireResidentKey: true,
+          },
+          extensions: {
+            largeBlob: {
+              support: "required"
+            },
+          },
+        },
+      },
+    });
+    assert_own_property(credential.getClientExtensionResults(), "largeBlob");
+    assert_true(credential.getClientExtensionResults().largeBlob.supported);
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(credential.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.create() with largeBlob.support set to required and supported by authenticator");
+}, {
+  protocol: "ctap2",
+  hasResidentKey: true,
+  hasUserVerification: true,
+  isUserVerified: true,
+  extensions: ["largeBlob"],
+});
+</script>
--- a/tests/wpt/web-platform-tests/webauthn/getcredential-large-blob-not-supported.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/getcredential-large-blob-not-supported.https.html
@ -0,0 +1,91 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>navigator.credentials.get() largeBlob extension tests with no authenticator support</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src=helpers.js></script>
+<body></body>
+<script>
+standardSetup(async function() {
+  "use strict";
+
+  const credential = createCredential();
+
+  promise_test(async t => {
+    return promise_rejects_dom(t, "NotSupportedError",
+      navigator.credentials.get({publicKey: {
+        challenge: new Uint8Array(),
+        allowCredentials: [{
+          id: (await credential).rawId,
+          type: "public-key",
+        }],
+        extensions: {
+          largeBlob: {
+            support: "preferred",
+          },
+        },
+      }}));
+  }, "navigator.credentials.get() with largeBlob.support set");
+
+  promise_test(async t => {
+    return promise_rejects_dom(t, "NotSupportedError",
+      navigator.credentials.get({publicKey: {
+        challenge: new Uint8Array(),
+        allowCredentials: [{
+          id: (await credential).rawId,
+          type: "public-key",
+        }],
+        extensions: {
+          largeBlob: {
+            read: true,
+            write: new ArrayBuffer(),
+          },
+        },
+      }}));
+  }, "navigator.credentials.get() with largeBlob.read and largeBlob.write set");
+
+  promise_test(async t => {
+    const assertion = await navigator.credentials.get({publicKey: {
+      challenge: new Uint8Array(),
+      allowCredentials: [{
+        id: (await credential).rawId,
+        type: "public-key",
+      }],
+      extensions: {
+        largeBlob: {
+          read: true,
+        },
+      },
+    }});
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "supported");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.get() with largeBlob.read set without authenticator support");
+
+  promise_test(async t => {
+    const assertion = await navigator.credentials.get({publicKey: {
+      challenge: new Uint8Array(),
+      allowCredentials: [{
+        id: (await credential).rawId,
+        type: "public-key",
+      }],
+      extensions: {
+        largeBlob: {
+          write: new TextEncoder().encode("Don't call me Shirley"),
+        },
+      },
+    }});
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "supported");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "blob");
+    assert_false(assertion.getClientExtensionResults().largeBlob.written);
+  }, "navigator.credentials.get() with largeBlob.write set without authenticator support");
+}, {
+  protocol: "ctap2",
+  hasResidentKey: true,
+  hasUserVerification: true,
+  isUserVerified: true,
+});
+</script>
--- a/tests/wpt/web-platform-tests/webauthn/getcredential-large-blob-supported.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/getcredential-large-blob-supported.https.html
@ -0,0 +1,90 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>navigator.credentials.get() largeBlob extension tests with authenticator support</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src=helpers.js></script>
+<body></body>
+<script>
+standardSetup(async function(authenticator) {
+  "use strict";
+
+  const credential = createCredential({
+    options: {
+      publicKey: {
+        authenticatorSelection: {
+          requireResidentKey: true,
+        },
+        extensions: {
+          largeBlob: {
+            support: "required",
+          },
+        },
+      },
+    },
+  });
+
+  promise_test(async t => {
+    const assertion = await navigator.credentials.get({publicKey: {
+      challenge: new Uint8Array(),
+      allowCredentials: [{
+        id: (await credential).rawId,
+        type: "public-key",
+      }],
+      extensions: {
+        largeBlob: {
+          read: true,
+        },
+      },
+    }});
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "supported");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.get() with largeBlob.read set with no blob on authenticator");
+
+  promise_test(async t => {
+    const blob = new TextEncoder().encode("According to all known laws of aviation, "
+                                        + "there is no way a bee should be able to fly");
+    let assertion = await navigator.credentials.get({publicKey: {
+      challenge: new Uint8Array(),
+      allowCredentials: [{
+        id: (await credential).rawId,
+        type: "public-key",
+      }],
+      extensions: {
+        largeBlob: {
+          write: blob,
+        },
+      },
+    }});
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "blob");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "supported");
+    assert_true(assertion.getClientExtensionResults().largeBlob.written);
+
+    assertion = await navigator.credentials.get({publicKey: {
+      challenge: new Uint8Array(),
+      allowCredentials: [{
+        id: (await credential).rawId,
+        type: "public-key",
+      }],
+      extensions: {
+        largeBlob: {
+          read: true,
+        },
+      },
+    }});
+    assert_array_equals(new Uint8Array(assertion.getClientExtensionResults().largeBlob.blob), blob);
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "supported");
+    assert_not_own_property(assertion.getClientExtensionResults().largeBlob, "written");
+  }, "navigator.credentials.get() read and write blob");
+}, {
+  protocol: "ctap2",
+  hasResidentKey: true,
+  hasUserVerification: true,
+  extensions: ["largeBlob"],
+  isUserVerified: true,
+});
+</script>
--- a/tests/wpt/web-platform-tests/webauthn/helpers.js
+++ b/tests/wpt/web-platform-tests/webauthn/helpers.js
@ -69,7 +69,7 @@ function createCredential(opts) {
    createArgs.options.publicKey.user.id = new Uint8Array(16);

    // change the defaults with any options that were passed in
-    extendObject (createArgs, opts);
+    extendObject(createArgs, opts);

    // create the credential, return the Promise
    return navigator.credentials.create(createArgs.options);
@ -344,7 +344,8 @@ function cloneObject(o) {
 function extendObject(dst, src) {
    Object.keys(src).forEach(function(key) {
        if (isSimpleObject(src[key])) {
-            extendObject (dst[key], src[key]);
+            dst[key] ||= {};
+            extendObject(dst[key], src[key]);
        } else {
            dst[key] = src[key];
        }
--- a/tests/wpt/web-platform-tests/webcodecs/video-decoder.html
+++ b/tests/wpt/web-platform-tests/webcodecs/video-decoder.html
@ -99,10 +99,7 @@ promise_test(async t => {
      });
    },
    error(e) {
-      t.step(() => {
-        // TODO(sandersd): Change to 'throw e' once e is defined.
-        throw "decode error";
-      });
+      t.step(() => { throw e; });
    }
  });

--- a/tests/wpt/web-platform-tests/webrtc-insertable-streams/RTCPeerConnection-insertable-streams-audio.https.html
+++ b/tests/wpt/web-platform-tests/webrtc-insertable-streams/RTCPeerConnection-insertable-streams-audio.https.html
@ -162,56 +162,6 @@ promise_test(async t => {
  return ontrackPromise;
 }, 'RTCRtpReceiver.createEncodedStream() throws if not requested in PC configuration');

-promise_test(async t => {
-  const caller = new RTCPeerConnection({encodedInsertableStreams:true});
-  t.add_cleanup(() => caller.close());
-  const callee = new RTCPeerConnection();
-  t.add_cleanup(() => callee.close());
-
-  const stream = await navigator.mediaDevices.getUserMedia({audio:true});
-  const track = stream.getTracks()[0];
-  t.add_cleanup(() => track.stop());
-
-  const sender = caller.addTrack(track)
-  const senderStreams = sender.createEncodedStreams();
-
-  const senderWorker = new Worker('RTCPeerConnection-sender-worker-single-frame.js')
-  senderWorker.postMessage(
-    {readableStream: senderStreams.readable},
-    [senderStreams.readable]);
-
-  let expectedFrameData = null;
-  let verifiedFrameData = false;
-  let numVerifiedFrames = 0;
-  const onmessagePromise = new Promise(resolve => {
-    senderWorker.onmessage = t.step_func(message => {
-      if (!(message.data instanceof RTCEncodedAudioFrame)) {
-        // This is the first message sent from the Worker to the test.
-        // It contains an object (not an RTCEncodedAudioFrame) with the same
-        // fields as the RTCEncodedAudioFrame to be sent in follow-up messages.
-        // These serve as expected values to validate that the
-        // RTCEncodedAudioFrame is sent correctly back to the test in the next
-        // message.
-        expectedFrameData = message.data;
-      } else {
-        // This is the frame sent by the Worker after reading it from the
-        // readable stream. The Worker sends it twice after sending the
-        // verification message.
-        assert_equals(message.data.type, expectedFrameData.type);
-        assert_equals(message.data.timestamp, expectedFrameData.timestamp);
-        assert_true(areArrayBuffersEqual(message.data.data, expectedFrameData.data));
-        if (++numVerifiedFrames == 2)
-          resolve();
-      }
-    });
-  });
-
-  exchangeIceCandidates(caller, callee);
-  await exchangeOfferAnswer(caller, callee);
-
-  return onmessagePromise;
-}, 'RTCRtpSender readable stream transferred to a Worker and the Worker sends an RTCEncodedAudioFrame back');
-
 promise_test(async t => {
  const caller = new RTCPeerConnection({encodedInsertableStreams:true});
  t.add_cleanup(() => caller.close());
--- a/tests/wpt/web-platform-tests/webrtc-insertable-streams/RTCPeerConnection-insertable-streams-worker.https.html
+++ b/tests/wpt/web-platform-tests/webrtc-insertable-streams/RTCPeerConnection-insertable-streams-worker.https.html
@ -9,6 +9,57 @@
 </head>
 <body>
 <script>
+promise_test(async t => {
+  const caller = new RTCPeerConnection({encodedInsertableStreams:true});
+  t.add_cleanup(() => caller.close());
+  const callee = new RTCPeerConnection();
+  t.add_cleanup(() => callee.close());
+
+  const stream = await navigator.mediaDevices.getUserMedia({audio:true});
+  const track = stream.getTracks()[0];
+  t.add_cleanup(() => track.stop());
+
+  const sender = caller.addTrack(track)
+  const senderStreams = sender.createEncodedStreams();
+
+  const senderWorker = new Worker('RTCPeerConnection-sender-worker-single-frame.js')
+  t.add_cleanup(() => senderWorker.terminate());
+  senderWorker.postMessage(
+    {readableStream: senderStreams.readable},
+    [senderStreams.readable]);
+
+  let expectedFrameData = null;
+  let verifiedFrameData = false;
+  let numVerifiedFrames = 0;
+  const onmessagePromise = new Promise(resolve => {
+    senderWorker.onmessage = t.step_func(message => {
+      if (!(message.data instanceof RTCEncodedAudioFrame)) {
+        // This is the first message sent from the Worker to the test.
+        // It contains an object (not an RTCEncodedAudioFrame) with the same
+        // fields as the RTCEncodedAudioFrame to be sent in follow-up messages.
+        // These serve as expected values to validate that the
+        // RTCEncodedAudioFrame is sent correctly back to the test in the next
+        // message.
+        expectedFrameData = message.data;
+      } else {
+        // This is the frame sent by the Worker after reading it from the
+        // readable stream. The Worker sends it twice after sending the
+        // verification message.
+        assert_equals(message.data.type, expectedFrameData.type);
+        assert_equals(message.data.timestamp, expectedFrameData.timestamp);
+        assert_true(areArrayBuffersEqual(message.data.data, expectedFrameData.data));
+        if (++numVerifiedFrames == 2)
+          resolve();
+      }
+    });
+  });
+
+  exchangeIceCandidates(caller, callee);
+  await exchangeOfferAnswer(caller, callee);
+
+  return onmessagePromise;
+}, 'RTCRtpSender readable stream transferred to a Worker and the Worker sends an RTCEncodedAudioFrame back');
+
 promise_test(async t => {
  const caller = new RTCPeerConnection({encodedInsertableStreams:true});
  t.add_cleanup(() => caller.close());
@ -23,6 +74,7 @@ promise_test(async t => {
  const senderStreams = videoSender.createEncodedStreams();

  const senderWorker = new Worker('RTCPeerConnection-sender-worker-single-frame.js')
+  t.add_cleanup(() => senderWorker.terminate());
  senderWorker.postMessage(
    {readableStream: senderStreams.readable},
    [senderStreams.readable]);