diff --git 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
index 76b398963ae..a9e46713244 100644
--- 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: FAIL
diff --git a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
index 3b874fc1748..6a3af4e2ece 100644
--- a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
@@ -14,6 +14,9 @@
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
+  [Revoke blob URL after calling fetch, fetch should succeed]
+    expected: FAIL
+
 
 [url-with-fetch.any.html]
   [Untitled]
@@ -34,6 +37,3 @@
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
-  [Revoke blob URL after calling fetch, fetch should succeed]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 43826c8d5ba..74bf491e9e4 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -204469,6 +204469,18 @@
      }
     ]
    ],
+   "infrastructure/reftest/reftest_fuzzy_chain_ini.html": [
+    [
+     "infrastructure/reftest/reftest_fuzzy_chain_ini.html",
+     [
+      [
+       "/infrastructure/reftest/fuzzy-ref-2.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "infrastructure/reftest/reftest_fuzzy_ini_full.html": [
     [
      "infrastructure/reftest/reftest_fuzzy_ini_full.html",
@@ -211729,6 +211741,18 @@
      {}
     ]
    ],
+   "infrastructure/reftest/fuzzy-ref-2.html": [
+    [
+     "infrastructure/reftest/fuzzy-ref-2.html",
+     [
+      [
+       "/infrastructure/reftest/fuzzy-ref-2a.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "infrastructure/reftest/reftest_and_fail_0-ref.html": [
     [
      "infrastructure/reftest/reftest_and_fail_0-ref.html",
@@ -275063,6 +275087,9 @@
    "infrastructure/metadata/infrastructure/reftest/reftest_cycle_fail.html.ini": [
     []
    ],
+   "infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_chain_ini.html": [
+    []
+   ],
    "infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_ini_full.html.ini": [
     []
    ],
@@ -275129,6 +275156,9 @@
    "infrastructure/reftest/fuzzy-ref-1.html": [
     []
    ],
+   "infrastructure/reftest/fuzzy-ref-2a.html": [
+    []
+   ],
    "infrastructure/reftest/green.html": [
     []
    ],
@@ -279623,6 +279653,9 @@
    "resource-timing/resources/object-refresh.html": [
     []
    ],
+   "resource-timing/resources/preflight.py": [
+    []
+   ],
    "resource-timing/resources/resource_timing_test0.css": [
     []
    ],
@@ -329123,6 +329156,18 @@
      {}
     ]
    ],
+   "css/css-values/minmax-length-percent-computed.html": [
+    [
+     "css/css-values/minmax-length-percent-computed.html",
+     {}
+    ]
+   ],
+   "css/css-values/minmax-length-percent-invalid.html": [
+    [
+     "css/css-values/minmax-length-percent-invalid.html",
+     {}
+    ]
+   ],
    "css/css-values/minmax-number-computed.html": [
     [
      "css/css-values/minmax-number-computed.html",
@@ -331665,6 +331710,12 @@
      {}
     ]
    ],
+   "css/motion/animation/offset-interpolation.html": [
+    [
+     "css/motion/animation/offset-interpolation.html",
+     {}
+    ]
+   ],
    "css/motion/animation/offset-path-interpolation-001.html": [
     [
      "css/motion/animation/offset-path-interpolation-001.html",
@@ -393997,6 +394048,38 @@
      {}
     ]
    ],
+   "resource-timing/cors-preflight.any.js": [
+    [
+     "resource-timing/cors-preflight.any.html",
+     {
+      "script_metadata": [
+       [
+        "script",
+        "/common/utils.js"
+       ],
+       [
+        "script",
+        "/common/get-host-info.sub.js"
+       ]
+      ]
+     }
+    ],
+    [
+     "resource-timing/cors-preflight.any.worker.html",
+     {
+      "script_metadata": [
+       [
+        "script",
+        "/common/utils.js"
+       ],
+       [
+        "script",
+        "/common/get-host-info.sub.js"
+       ]
+      ]
+     }
+    ]
+   ],
    "resource-timing/crossorigin-sandwich-TAO.sub.html": [
     [
      "resource-timing/crossorigin-sandwich-TAO.sub.html",
@@ -552546,7 +552629,7 @@
    "testharness"
   ],
   "css/css-fonts/animations/font-variation-settings-interpolation.html": [
-   "e11079cfc012ce8937b504662e1f0f6f92351fe2",
+   "cb99d7b255e9ac8743b7afadc79c7276ff5f74ed",
    "testharness"
   ],
   "css/css-fonts/calc-in-font-variation-settings.html": [
@@ -594725,6 +594808,14 @@
    "1405c3198128530939d9778642aaab2920bb6e60",
    "testharness"
   ],
+  "css/css-values/minmax-length-percent-computed.html": [
+   "881905ddd565960d47839f1b5a64770ad7627ba5",
+   "testharness"
+  ],
+  "css/css-values/minmax-length-percent-invalid.html": [
+   "ee086ef269d07bf6b0db5d1306a0f24af0ad8fab",
+   "testharness"
+  ],
   "css/css-values/minmax-number-computed.html": [
    "c72c276625466a193bf8829e3ddbb87d7a565dc0",
    "testharness"
@@ -605246,11 +605337,15 @@
    "support"
   ],
   "css/motion/animation/offset-anchor-interpolation.html": [
-   "75f855a2c8aff046c2817201197b3eb345327a4a",
+   "9c69c0f0bed2b14c02091ccf63f50ace61f2eb2a",
    "testharness"
   ],
   "css/motion/animation/offset-distance-interpolation.html": [
-   "4912b9cf2510b45915756b320f5872dad2cae5d8",
+   "bc0c094a8e5305c970f0a4d44ee8a3726d2965a1",
+   "testharness"
+  ],
+  "css/motion/animation/offset-interpolation.html": [
+   "0d1ba1c8875ca1d76e52a01a655037cad6f8eff9",
    "testharness"
   ],
   "css/motion/animation/offset-path-interpolation-001.html": [
@@ -605270,15 +605365,15 @@
    "testharness"
   ],
   "css/motion/animation/offset-path-interpolation-005.html": [
-   "afe4bf5774357f0387f1ab63642ab6d02a8e9c6a",
+   "9924106f4b75ede89e5270a76fe217f85ef20050",
    "testharness"
   ],
   "css/motion/animation/offset-position-interpolation.html": [
-   "5ccca37dc304fbdabf73f0bc074b54d2682c6336",
+   "9faaf9487afb20059046e95a8cd5b3a796e8fd42",
    "testharness"
   ],
   "css/motion/animation/offset-rotate-interpolation.html": [
-   "a55a005747f6d0a45a950b8b2315c8a71970043c",
+   "55845108ebf5f3c42a8b0532121199136160d695",
    "testharness"
   ],
   "css/motion/animation/reftests/offset-distance-interpolation-001.html": [
@@ -607538,7 +607633,7 @@
    "support"
   ],
   "css/support/interpolation-testcommon.js": [
-   "62f40790dbdf25720a127e21ed14d7fedafdef0f",
+   "e7ee011cdb470ee228a8a32442d6a717ef6ffd0a",
    "support"
   ],
   "css/support/parsing-testcommon.js": [
@@ -647029,6 +647124,10 @@
    "472b33f7764bde6e2aea7bc2ccd8bf3739babad2",
    "support"
   ],
+  "infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_chain_ini.html": [
+   "69dc018f38990001626df54f1d067efd3421fdd0",
+   "support"
+  ],
   "infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_ini_full.html.ini": [
    "0ebde2f4a62f4df54dd5639904df0478b457e56b",
    "support"
@@ -647121,6 +647220,14 @@
    "e50fc11ef6ea80754e702becfbf675feebe3dbb9",
    "support"
   ],
+  "infrastructure/reftest/fuzzy-ref-2.html": [
+   "cdaf6446ed40dd5c251a7f7031aeaba91bf79541",
+   "reftest_node"
+  ],
+  "infrastructure/reftest/fuzzy-ref-2a.html": [
+   "99da3203afba94574df823bb79d39a735b282b44",
+   "support"
+  ],
   "infrastructure/reftest/green-ref.html": [
    "0e145d60b55b3502639d15f10d4d63a6b0f79b7d",
    "reftest"
@@ -647181,6 +647288,10 @@
    "1930fe0ae8fb1aee30e91e691fe6a73ccfc87d0e",
    "reftest"
   ],
+  "infrastructure/reftest/reftest_fuzzy_chain_ini.html": [
+   "4353379ddb443355a978a7fc100ef470488035fd",
+   "reftest"
+  ],
   "infrastructure/reftest/reftest_fuzzy_ini_full.html": [
    "7429025798151b620dd72db71a46070aafe6c070",
    "reftest"
@@ -647566,7 +647677,7 @@
    "support"
   ],
   "interfaces/element-timing.idl": [
-   "cf56426fb6ea9ed133c76d1b36327ca95fe348b9",
+   "6a54bbd2af6952ff51b37907f866e7bdd770257a",
    "support"
   ],
   "interfaces/encoding.idl": [
@@ -647662,15 +647773,15 @@
    "support"
   ],
   "interfaces/largest-contentful-paint.idl": [
-   "d2c69c4757553fd4b6d7133067859fa39fe013b5",
+   "d3cfd56bafd171fb5820ace2c99eaa4e1a09b45a",
    "support"
   ],
   "interfaces/layout-instability.idl": [
-   "c46151a923dd32f1eb186b18e6d6d26bfb800451",
+   "0cd2262a9f32d4a4d6f81aae165c3a411868cfc4",
    "support"
   ],
   "interfaces/longtasks.idl": [
-   "333b842f86e5d41f6f1aab8827cf086356c5a782",
+   "ef3f660038bed8cf7064d51f7e261af11532df9c",
    "support"
   ],
   "interfaces/magnetometer.idl": [
@@ -647682,7 +647793,7 @@
    "support"
   ],
   "interfaces/media-playback-quality.idl": [
-   "12b2c74e6183af66ec5bfae1897b7c46f276bdac",
+   "5a93de9f06c654c5e4f2a015674ae93dd21cbfc4",
    "support"
   ],
   "interfaces/media-source.idl": [
@@ -647814,7 +647925,7 @@
    "support"
   ],
   "interfaces/screen-capture.idl": [
-   "f22f7a9a810e0d1330ee43b425fb778e7c4da911",
+   "b5b0067650d3e6de5fa78991409a3744a1995066",
    "support"
   ],
   "interfaces/screen-orientation.idl": [
@@ -647822,7 +647933,7 @@
    "support"
   ],
   "interfaces/scroll-animations.idl": [
-   "21013919a5d9d8cc0181e9f9b7637d0212409681",
+   "f2560d9ffc88eaadf961b055480ed605610f72bf",
    "support"
   ],
   "interfaces/secure-contexts.idl": [
@@ -647854,7 +647965,7 @@
    "support"
   ],
   "interfaces/touch-events.idl": [
-   "17be1b46b379fe1aefef076ef8066e0a4570bad0",
+   "1a8c9d7d24ece0ea221b6863ce8ea3595bcbb697",
    "support"
   ],
   "interfaces/trusted-types.tentative.idl": [
@@ -647894,7 +648005,7 @@
    "support"
   ],
   "interfaces/web-animations.idl": [
-   "0fc5b47a976dd55a3d9701dd4cbc8e4ad8ada9b0",
+   "72ac87f3e33633864b779632c85cb2fbb473ef4c",
    "support"
   ],
   "interfaces/web-bluetooth.idl": [
@@ -647930,7 +648041,7 @@
    "support"
   ],
   "interfaces/webmidi.idl": [
-   "58d6357f7365765c7e9142024caddba51c373927",
+   "0dfcb7771a871ff9a3568afc99a564c1e06b71a2",
    "support"
   ],
   "interfaces/webrtc-dscp.idl": [
@@ -671965,6 +672076,10 @@
    "eaf21b483ccd6ec63bcb8dc87c9e19a4305bf43d",
    "testharness"
   ],
+  "resource-timing/cors-preflight.any.js": [
+   "5bbf3d2a2345ed4a5202d64b241468614352b0a8",
+   "testharness"
+  ],
   "resource-timing/crossorigin-sandwich-TAO.sub.html": [
    "c3085950bd68ac72e1079a04d52ac3e1e1c603fb",
    "testharness"
@@ -672349,6 +672464,10 @@
    "9e43e19de19fc7c364e68e0b2415963f55e9ddb2",
    "support"
   ],
+  "resource-timing/resources/preflight.py": [
+   "4fca99d0717488b67c7c389d400b2ee57ec88fa2",
+   "support"
+  ],
   "resource-timing/resources/resource_timing_test0.css": [
    "8bc8326ba675adcc8aa809dd0b885dba3285782d",
    "support"
@@ -683438,7 +683557,7 @@
    "support"
   ],
   "tools/ci/run_tc.py": [
-   "1cfb41fcaaba55d9e1ee7d4722bb6c56aabeb459",
+   "240517a1ff68ba072cc48f31bf42ed8c9d888048",
    "support"
   ],
   "tools/ci/taskcluster-run.py": [
@@ -689198,7 +689317,7 @@
    "support"
   ],
   "tools/wptserve/tests/functional/test_pipes.py": [
-   "bad4d624c9f0a29bc8e4b3a740c0ffe834dc88f3",
+   "a6a703e304902dafaf43975ab1ac0580e160fdc3",
    "support"
   ],
   "tools/wptserve/tests/functional/test_request.py": [
@@ -689242,7 +689361,7 @@
    "support"
   ],
   "tools/wptserve/wptserve/handlers.py": [
-   "e846ff807a6163688473d80e9cdbaca8d13f45ff",
+   "ca5118009cfc9c4763f99e2a6296d784a6539216",
    "support"
   ],
   "tools/wptserve/wptserve/logger.py": [
@@ -694450,7 +694569,7 @@
    "support"
   ],
   "webdriver/tests/support/fixtures.py": [
-   "9f8c983d49816e21c07541daa54cecddca7d206e",
+   "ab2aaf4e75d96492d9c6419ab11d567205652b8f",
    "support"
   ],
   "webdriver/tests/support/helpers.py": [
@@ -694482,7 +694601,7 @@
    "support"
   ],
   "webdriver/tests/switch_to_frame/cross_origin.py": [
-   "3e5bab191a8eaa0976065d94f657b207e83d8ef9",
+   "4425a3ab901fef0effb2fc94ca3611e57f2ba51c",
    "wdspec"
   ],
   "webdriver/tests/switch_to_frame/switch.py": [
@@ -695410,7 +695529,7 @@
    "testharness"
   ],
   "webrtc/RTCIceTransport.html": [
-   "6a00e1c59e7183fd84712862b6c6b044d4be340d",
+   "94dc1c461fb5b2074b4975612251a7814af045e5",
    "testharness"
   ],
   "webrtc/RTCPeerConnection-add-track-no-deadlock.https.html": [
@@ -695478,7 +695597,7 @@
    "testharness"
   ],
   "webrtc/RTCPeerConnection-iceConnectionState.https.html": [
-   "282771153c4645994a661048d2829859c73d705f",
+   "c0ce25eb76bfe3464863ec42b31842cfbb88b8de",
    "testharness"
   ],
   "webrtc/RTCPeerConnection-iceGatheringState.html": [
@@ -700418,11 +700537,11 @@
    "testharness"
   ],
   "webxr/xrDevice_requestSession_optionalFeatures.https.html": [
-   "c274f4ff7138df2bdc98fbc173db73d29321afc2",
+   "0071b81e828603c3765edc1fea3ff659b3e39452",
    "testharness"
   ],
   "webxr/xrDevice_requestSession_requiredFeatures_unknown.https.html": [
-   "02b26c05cb5dc0e5b721e472632fae3aa83b6275",
+   "9fa8c31d63aab6f74886b55596ff63911018f51e",
    "testharness"
   ],
   "webxr/xrDevice_supportsSession_immersive.https.html": [
diff --git a/tests/wpt/metadata/css/css-values/minmax-length-percent-computed.html.ini b/tests/wpt/metadata/css/css-values/minmax-length-percent-computed.html.ini
new file mode 100644
index 00000000000..2c3c8100418
--- /dev/null
+++ b/tests/wpt/metadata/css/css-values/minmax-length-percent-computed.html.ini
@@ -0,0 +1,151 @@
+[minmax-length-percent-computed.html]
+  [Property margin-left value 'min(20px, 10%)' computes to '10px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1vh + 1%)' computes to '11.4px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1pc + 1%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1em, 10%)' computes to '10px']
+    expected: FAIL
+
+  [Property margin-left value 'min(30px + 10%, 60px + 5%)' computes to '70px']
+    expected: FAIL
+
+  [Property margin-left value 'max(20px, 10%)' computes to '40px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) * 2)' computes to '60px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) - 10px)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'max(20px, 10%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1mm + 1%)' computes to '7.78333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1em + 1%)' computes to '24px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1Q + 1%)' computes to '4.95px']
+    expected: FAIL
+
+  [Property margin-left value 'min(20px, 10%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(max(1em, 15%) * 2)' computes to '120px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1vmin + 1%)' computes to '11.4px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1px + 1%)' computes to '5px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1Q + 1%)' computes to '4.95px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1cm + 1%)' computes to '41.8px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1vmax + 1%)' computes to '14.2333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) - max(1em, 15%))' computes to '-30px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1vw + 1%)' computes to '14.2333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'max(2em + 10%, 1em + 20%)' computes to '100px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1in + 1%)' computes to '100px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1cm + 1%)' computes to '41.8px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) + max(1em, 15%))' computes to '90px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1vw + 1%)' computes to '14.2333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) / 2)' computes to '15px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1em + 1%)' computes to '24px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1pt + 1%)' computes to '5.33333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1ch + 1%)' computes to '14px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1mm + 1%)' computes to '7.78333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1rem + 1%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1vmin + 1%)' computes to '11.4px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1em, 10%)' computes to '40px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1vh + 1%)' computes to '11.4px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1vmax + 1%)' computes to '14.2333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1pt + 1%)' computes to '5.33333333333333px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1ex + 1%)' computes to '14px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(min(1.5em, 10%) + 10px)' computes to '40px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1em, 10%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1em, 10%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1ex + 1%)' computes to '14px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(max(1em, 15%) - 10px)' computes to '50px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1ch + 1%)' computes to '14px']
+    expected: FAIL
+
+  [Property margin-left value 'max(1in + 1%)' computes to '100px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(max(1em, 15%) / 2)' computes to '30px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1pc + 1%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1px + 1%)' computes to '5px']
+    expected: FAIL
+
+  [Property margin-left value 'min(1rem + 1%)' computes to '20px']
+    expected: FAIL
+
+  [Property margin-left value 'calc(max(1em, 15%) + 10px)' computes to '70px']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini b/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini
deleted file mode 100644
index e6e1f29e274..00000000000
--- a/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[matchMedia-display-none-iframe.html]
-  expected: ERROR
diff --git a/tests/wpt/metadata/fetch/content-type/response.window.js.ini b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
index fc6f6c144f3..6527ed8fb48 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,12 +312,6 @@
   [<iframe>: separate response Content-Type: */* text/html]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html */*]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
@@ -330,3 +324,12 @@
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
+  [<iframe>: combined response Content-Type: text/html;" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index 2638e2f8172..a5b9b3752be 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,15 +53,6 @@
   [combined text/javascript ]
     expected: FAIL
 
-  [separate text/javascript x/x]
-    expected: FAIL
-
-  [separate text/javascript;charset=windows-1252 error text/javascript]
-    expected: FAIL
-
-  [separate text/javascript error]
-    expected: FAIL
-
   [separate text/javascript;charset=windows-1252  text/javascript]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
new file mode 100644
index 00000000000..87b07c3e670
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
@@ -0,0 +1,4 @@
+[traverse_the_history_1.html]
+  [Multiple history traversals from the same task]
+    expected: FAIL
+
diff --git 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_4.html.ini
similarity index 71%
rename from tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
rename to tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
index 51f8272a6de..385376c7321 100644
--- 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_4.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_3.html]
+[traverse_the_history_4.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
index 23eefb8eaf9..e150c9d848f 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-screenx-screeny.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `screenx`, `screeny`]
     expected: FAIL
 
-  [features "screenx=-204" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-204" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-204.5" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-0" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screenx=-0" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "screenx=-204.5" should NOT set "left=204"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
index 940516ddd33..ad8840fbb68 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-top-left.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `top`, `left`]
     expected: FAIL
 
-  [features "top=-204" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "top=-204.5" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "left=-204" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "top=-0" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "left=-204.5" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "left=-0" should NOT set "left=204"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
index 9027336b453..d1ed9088b2b 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-width-height.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `width`, `height`]
     expected: FAIL
 
-  [features "height=-404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=-404e1" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=-404.5" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "width=-404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=-404e1" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=-404.5" should NOT set "width=404"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
index 4e44584b123..a70e9dbad4d 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
@@ -1,48 +1,32 @@
 [open-features-non-integer-height.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `height`]
     expected: FAIL
 
   [features "height=405*3" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405.5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405LLl" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "height=/404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [top=0,left=0,width=401,: absence of feature "height" should be treated same as "height=0"]
-    expected: TIMEOUT
-
-  [top=0,left=0: absence of feature "height" should be treated same as "height=0"]
-    expected: TIMEOUT
-
-  [features "height=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=L404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
index fcaeae5336d..779531b4a98 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-innerheight.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerheight`]
     expected: FAIL
 
   [features "innerheight=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405LLl" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405.5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405*3" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "innerheight=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=L404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=/404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
index 42327fedd27..7a1b258d52e 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-innerwidth.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerwidth`]
     expected: FAIL
 
   [features "innerwidth=405e-1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405*3" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405.5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405e1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405.32" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405  " should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405LLl" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405/5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405^4" should set "width=405"]
-    expected: TIMEOUT
-
-  [features "innerwidth=/404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=_404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=L404" should NOT set "width=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
index 64a08faf0e6..9ace8a4cbdb 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-screenx.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screenx`]
     expected: FAIL
 
   [features "screenx=105.5" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105e1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105  " should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105*3" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105e-1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105^4" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105LLl" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105/5" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105.32" should set "left=105"]
-    expected: TIMEOUT
-
-  [features "screenx=_104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "screenx=L104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "screenx=/104" should NOT set "left=104"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
index 4f22ef4ef29..a82bd0f981a 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-screeny.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screeny`]
     expected: FAIL
 
   [features "screeny=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405LLl" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405*3" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405.5" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "screeny=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "screeny=L404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "screeny=/404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
index 8540f53d8d6..10f617db69e 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-top.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `top`]
     expected: FAIL
 
   [features "top=105/5" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105*3" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105LLl" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105e-1" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105.32" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105e1" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105  " should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105^4" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105.5" should set "top=105"]
-    expected: TIMEOUT
-
-  [features "top=/104" should NOT set "top=104"]
-    expected: TIMEOUT
-
-  [features "top=_104" should NOT set "top=104"]
-    expected: TIMEOUT
-
-  [features "top=L104" should NOT set "top=104"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
index 9d841e61bc0..28f93ee71b5 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
@@ -1,48 +1,32 @@
 [open-features-non-integer-width.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `width`]
     expected: FAIL
 
   [features "width=405^4" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405.5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405e1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405  " should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405.32" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405LLl" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405*3" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405e-1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405/5" should set "width=405"]
-    expected: TIMEOUT
-
-  [top=0,left=0: absence of feature "width" should be treated same as "width=0"]
-    expected: TIMEOUT
-
-  [features "width=_404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [top=0,left=0,height=401,: absence of feature "width" should be treated same as "width=0"]
-    expected: TIMEOUT
-
-  [features "width=/404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=L404" should NOT set "width=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git 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
index 406b298d352..fd369192a02 100644
--- 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 +1,11 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
+  expected: TIMEOUT
   [opener and "removed" embedded documents]
     expected: FAIL
 
+  [opener of discarded nested browsing context]
+    expected: FAIL
+
+  [opener of discarded auxiliary browsing context]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
new file mode 100644
index 00000000000..9e522297c94
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
@@ -0,0 +1,7 @@
+[toggleEvent.html]
+  [Calling open twice on 'details' fires only one toggle event]
+    expected: FAIL
+
+  [Setting open=true to opened 'details' element should not fire a toggle event at the 'details' element]
+    expected: FAIL
+
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 034d9baebfa..496bad988c6 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
@@ -1,5 +1,4 @@
 [promise-rejection-events.html]
-  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
     expected: FAIL
 
@@ -9,6 +8,3 @@
   [no unhandledrejection/rejectionhandled: rejection handler attached synchronously to a promise created from createImageBitmap]
     expected: FAIL
 
-  [rejectionhandled is dispatched from a queued task, and not immediately]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/resource-timing/cors-preflight.any.js.ini b/tests/wpt/metadata/resource-timing/cors-preflight.any.js.ini
new file mode 100644
index 00000000000..ba4a8ba9f1d
--- /dev/null
+++ b/tests/wpt/metadata/resource-timing/cors-preflight.any.js.ini
@@ -0,0 +1,9 @@
+[cors-preflight.any.html]
+  [PerformanceResourceTiming sizes fetch with preflight test]
+    expected: FAIL
+
+
+[cors-preflight.any.worker.html]
+  [PerformanceResourceTiming sizes fetch with preflight test]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/resource-timing/resource_TAO_origin.htm.ini b/tests/wpt/metadata/resource-timing/resource_TAO_origin.htm.ini
index 5a549d938b6..5c59982f790 100644
--- a/tests/wpt/metadata/resource-timing/resource_TAO_origin.htm.ini
+++ b/tests/wpt/metadata/resource-timing/resource_TAO_origin.htm.ini
@@ -11,3 +11,6 @@
   [The iframe should have one resource timing entry.]
     expected: FAIL
 
+  [responseEnd should not be 0 in timing-allow cross-origin request.]
+    expected: FAIL
+
diff --git 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
index a56bad443a2..66bd350083b 100644
--- 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
@@ -1,5 +1,4 @@
 [realtimeanalyser-fft-scaling.html]
-  expected: TIMEOUT
   [X 2048-point FFT peak position is not equal to 64. Got 0.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webdriver/tests/switch_to_frame/cross_origin.py.ini b/tests/wpt/metadata/webdriver/tests/switch_to_frame/cross_origin.py.ini
new file mode 100644
index 00000000000..0e1d96dc9e1
--- /dev/null
+++ b/tests/wpt/metadata/webdriver/tests/switch_to_frame/cross_origin.py.ini
@@ -0,0 +1,4 @@
+[cross_origin.py]
+  [test_nested_cross_origin_iframe]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webxr/xrDevice_requestSession_optionalFeatures.https.html.ini b/tests/wpt/metadata/webxr/xrDevice_requestSession_optionalFeatures.https.html.ini
index 40c12b5fea7..b20c9fe3f68 100644
--- a/tests/wpt/metadata/webxr/xrDevice_requestSession_optionalFeatures.https.html.ini
+++ b/tests/wpt/metadata/webxr/xrDevice_requestSession_optionalFeatures.https.html.ini
@@ -5,3 +5,9 @@
   [Tests requestSession accepts XRSessionInit dictionary with empty feature lists]
     expected: FAIL
 
+  [Tests requestSession ignores unknown objects in optionalFeatures]
+    expected: FAIL
+
+  [Tests requestSession ignores unknown strings in optionalFeatures]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
deleted file mode 100644
index 80f9a4f15b8..00000000000
--- a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[Worker-constructor.html]
-  expected: ERROR
diff --git a/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini b/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini
new file mode 100644
index 00000000000..dbea4f293ad
--- /dev/null
+++ b/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini
@@ -0,0 +1,2 @@
+[transition_calc_implicit.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/animations/font-variation-settings-interpolation.html b/tests/wpt/web-platform-tests/css/css-fonts/animations/font-variation-settings-interpolation.html
index e11079cfc01..cb99d7b255e 100644
--- a/tests/wpt/web-platform-tests/css/css-fonts/animations/font-variation-settings-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/css-fonts/animations/font-variation-settings-interpolation.html
@@ -20,10 +20,24 @@
 <body></body>
 
 <script>
+
+// Because font-variation-settings is specced as a map rather than a list
+// (https://github.com/w3c/csswg-drafts/issues/1959), browsers are allowed to
+// reorder the output as they see fit.
+function compareFontVariationSettings(actual, expected) {
+  // This is not perfect, but should serve as a reasonable comparison. We split
+  // the inputs into arrays and trim each characteristic, then sort the array
+  // and compare them.
+  const actual_arr = actual.split(',').map(x => x.trim()).sort();
+  const expected_arr = expected.split(',').map(x => x.trim()).sort();
+  assert_array_equals(actual_arr, expected_arr);
+}
+
 test_interpolation({
   property: 'font-variation-settings',
   from: neutralKeyframe,
   to: '"test" 20',
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: -0.5, expect: "'test' 5"},
   {at: 0, expect: "'test' 10"},
@@ -43,6 +57,7 @@ test_interpolation({
   property: 'font-variation-settings',
   from: 'inherit',
   to: "'test' 20",
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: -0.5, expect: "'test' 35"},
   {at: 0, expect: "'test' 30"},
@@ -56,6 +71,7 @@ test_interpolation({
   property: 'font-variation-settings',
   from: 'unset',
   to: "'test' 20",
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: -0.5, expect: "'test' 35"},
   {at: 0, expect: "'test' 30"},
@@ -75,6 +91,7 @@ test_interpolation({
   property: 'font-variation-settings',
   from: "'test' 20",
   to: "'test' 30",
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: -0.5, expect: "'test' 15"},
   {at: 0, expect: "'test' 20"},
@@ -88,6 +105,7 @@ test_interpolation({
   property: 'font-variation-settings',
   from: "'aaaa' 0, 'bbbb' 10, 'cccc' 20",
   to: "'aaaa' 10, 'bbbb' 20, 'cccc' 30",
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: -0.5, expect: "'aaaa' -5, 'bbbb' 5, 'cccc' 15"},
   {at: 0, expect: "'aaaa' 0, 'bbbb' 10, 'cccc' 20"},
@@ -97,6 +115,21 @@ test_interpolation({
   {at: 1.5, expect: "'aaaa' 15, 'bbbb' 25, 'cccc' 35"},
 ]);
 
+// font-variation-settings is a map, so any order works.
+test_interpolation({
+  property: 'font-variation-settings',
+  from: "'aaaa' 0, 'bbbb' 10, 'cccc' 20",
+  to: "'cccc' 10, 'bbbb' 20, 'aaaa' 30",
+  comparisonFunction: compareFontVariationSettings,
+}, [
+  {at: -0.5, expect: "'aaaa' -15, 'bbbb' 5, 'cccc' 25"},
+  {at: 0, expect: "'aaaa' 0, 'bbbb' 10, 'cccc' 20"},
+  {at: 0.3, expect: "'aaaa' 9, 'bbbb' 13, 'cccc' 17"},
+  {at: 0.7, expect: "'aaaa' 21, 'bbbb' 17, 'cccc' 13"},
+  {at: 1, expect: "'aaaa' 30, 'bbbb' 20, 'cccc' 10"},
+  {at: 1.5, expect: "'aaaa' 45, 'bbbb' 25, 'cccc' 5"},
+]);
+
 test_no_interpolation({
   property: 'font-variation-settings',
   from: "'aaaa' 0, 'bbbb' 10",
@@ -109,12 +142,6 @@ test_no_interpolation({
   to: "'aaaa' 0, 'bbbb' 10",
 });
 
-test_no_interpolation({
-  property: 'font-variation-settings',
-  from: "'aaaa' 0, 'bbbb' 10, 'cccc' 20",
-  to: "'cccc' 10, 'bbbb' 20, 'aaaa' 30",
-});
-
 test_no_interpolation({
   property: 'font-variation-settings',
   from: "'aaaa' 0, 'bbbb' 10, 'cccc' 20",
@@ -126,7 +153,9 @@ test_interpolation({
   property: 'font-variation-settings',
   from: "'aaaa' 30, 'bbbb' 20",
   to: "'aaaa' 20, 'bbbb' 30",
+  comparisonFunction: compareFontVariationSettings,
 }, [
   {at: 3.40282e+38, expect: "'aaaa' -3.40282e+38, 'bbbb' 3.40282e+38"},
 ]);
+
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-computed.html b/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-computed.html
new file mode 100644
index 00000000000..881905ddd56
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-computed.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#comp-func">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#mixed-percentages">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#calc-type-checking">
+<link rel="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../support/computed-testcommon.js"></script>
+<div id="container" style="font-size: 20px; width: 400px">
+  <div id="target"></div>
+  <div id="reference"></div>
+</div>
+<script>
+const property = 'margin-left';
+
+function test_length_percent_equals(value, expected) {
+  const reference = document.getElementById('reference');
+  reference.style[property] = '';
+  reference.style[property] = expected;
+  const computed = getComputedStyle(reference)[property];
+  test_computed_value(property, value, computed);
+}
+
+// Identity tests
+test_length_percent_equals('min(1px + 1%)', 'calc(1px + 1%)');
+test_length_percent_equals('min(1cm + 1%)', 'calc(1cm + 1%)');
+test_length_percent_equals('min(1mm + 1%)', 'calc(1mm + 1%)');
+test_length_percent_equals('min(1Q + 1%)', 'calc(1Q + 1%)');
+test_length_percent_equals('min(1in + 1%)', 'calc(1in + 1%)');
+test_length_percent_equals('min(1pc + 1%)', 'calc(1pc + 1%)');
+test_length_percent_equals('min(1pt + 1%)', 'calc(1pt + 1%)');
+test_length_percent_equals('min(1em + 1%)', 'calc(1em + 1%)');
+test_length_percent_equals('min(1ex + 1%)', 'calc(1ex + 1%)');
+test_length_percent_equals('min(1ch + 1%)', 'calc(1ch + 1%)');
+test_length_percent_equals('min(1rem + 1%)', 'calc(1rem + 1%)');
+test_length_percent_equals('min(1vh + 1%)', 'calc(1vh + 1%)');
+test_length_percent_equals('min(1vw + 1%)', 'calc(1vw + 1%)');
+test_length_percent_equals('min(1vmin + 1%)', 'calc(1vmin + 1%)');
+test_length_percent_equals('min(1vmax + 1%)', 'calc(1vmax + 1%)');
+test_length_percent_equals('max(1px + 1%)', 'calc(1px + 1%)');
+test_length_percent_equals('max(1cm + 1%)', 'calc(1cm + 1%)');
+test_length_percent_equals('max(1mm + 1%)', 'calc(1mm + 1%)');
+test_length_percent_equals('max(1Q + 1%)', 'calc(1Q + 1%)');
+test_length_percent_equals('max(1in + 1%)', 'calc(1in + 1%)');
+test_length_percent_equals('max(1pc + 1%)', 'calc(1pc + 1%)');
+test_length_percent_equals('max(1pt + 1%)', 'calc(1pt + 1%)');
+test_length_percent_equals('max(1em + 1%)', 'calc(1em + 1%)');
+test_length_percent_equals('max(1ex + 1%)', 'calc(1ex + 1%)');
+test_length_percent_equals('max(1ch + 1%)', 'calc(1ch + 1%)');
+test_length_percent_equals('max(1rem + 1%)', 'calc(1rem + 1%)');
+test_length_percent_equals('max(1vh + 1%)', 'calc(1vh + 1%)');
+test_length_percent_equals('max(1vw + 1%)', 'calc(1vw + 1%)');
+test_length_percent_equals('max(1vmin + 1%)', 'calc(1vmin + 1%)');
+test_length_percent_equals('max(1vmax + 1%)', 'calc(1vmax + 1%)');
+
+// Comparisons between lengths and percentages
+test_length_percent_equals('min(20px, 10%)', '20px');
+test_length_percent_equals('min(1em, 10%)', '20px');
+test_length_percent_equals('max(20px, 10%)', '40px');
+test_length_percent_equals('max(1em, 10%)', '40px');
+
+document.getElementById('container').style.width = '100px';
+test_length_percent_equals('min(20px, 10%)', '10px');
+test_length_percent_equals('min(1em, 10%)', '10px');
+test_length_percent_equals('max(20px, 10%)', '20px');
+test_length_percent_equals('max(1em, 10%)', '20px');
+document.getElementById('container').style.width = '400px';
+
+// Comparisons between different mixings
+test_length_percent_equals('min(30px + 10%, 60px + 5%)', '70px');
+test_length_percent_equals('max(2em + 10%, 1em + 20%)', '100px');
+
+// General calculations
+test_length_percent_equals('calc(min(1.5em, 10%) + 10px)', '40px');
+test_length_percent_equals('calc(min(1.5em, 10%) - 10px)', '20px');
+test_length_percent_equals('calc(min(1.5em, 10%) * 2)', '60px');
+test_length_percent_equals('calc(min(1.5em, 10%) / 2)', '15px');
+test_length_percent_equals('calc(max(1em, 15%) + 10px)', '70px');
+test_length_percent_equals('calc(max(1em, 15%) - 10px)', '50px');
+test_length_percent_equals('calc(max(1em, 15%) * 2)', '120px');
+test_length_percent_equals('calc(max(1em, 15%) / 2)', '30px');
+test_length_percent_equals('calc(min(1.5em, 10%) + max(1em, 15%))', '90px');
+test_length_percent_equals('calc(min(1.5em, 10%) - max(1em, 15%))', '-30px');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-invalid.html b/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-invalid.html
new file mode 100644
index 00000000000..ee086ef269d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-values/minmax-length-percent-invalid.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#comp-func">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#mixed-percentages">
+<link rel="help" href="https://drafts.csswg.org/css-values-4/#calc-type-checking">
+<link rel="author" title="Xiaocheng Hu" href="mailto:xiaochengh@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../support/parsing-testcommon.js"></script>
+<script>
+function test_invalid_length_percent(value) {
+  test_invalid_value('margin-left', value);
+}
+
+// Type checking only. Syntax checking is done by other test files.
+// <length-percentage> accepts mixing lengths and percentages only.
+test_invalid_length_percent('min(1px, 0)');
+test_invalid_length_percent('min(1px, 0s)');
+test_invalid_length_percent('min(1px, 0Hz)');
+test_invalid_length_percent('min(1px, 0dpi)');
+test_invalid_length_percent('min(1px, 0fr)');
+test_invalid_length_percent('min(1%, 0)');
+test_invalid_length_percent('min(1%, 0s)');
+test_invalid_length_percent('min(1%, 0Hz)');
+test_invalid_length_percent('min(1%, 0dpi)');
+test_invalid_length_percent('min(1%, 0fr)');
+test_invalid_length_percent('max(1px, 0)');
+test_invalid_length_percent('max(1px, 0s)');
+test_invalid_length_percent('max(1px, 0Hz)');
+test_invalid_length_percent('max(1px, 0dpi)');
+test_invalid_length_percent('max(1px, 0fr)');
+test_invalid_length_percent('max(1%, 0)');
+test_invalid_length_percent('max(1%, 0s)');
+test_invalid_length_percent('max(1%, 0Hz)');
+test_invalid_length_percent('max(1%, 0dpi)');
+test_invalid_length_percent('max(1%, 0fr)');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-anchor-interpolation.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-anchor-interpolation.html
index 75f855a2c8a..9c69c0f0bed 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-anchor-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-anchor-interpolation.html
@@ -10,14 +10,11 @@
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
     <style>
-      body {
-        width: 500px;
-        height: 500px;
-        transform: rotate(0deg);
+      .parent {
+        offset-anchor: 30px 10px;
       }
-      div {
-        width: 10px;
-        height: 10px;
+      .target {
+        offset-anchor: 10px 30px;
       }
     </style>
   </head>
@@ -67,6 +64,63 @@
         from: 'right 10px top 20%',
         to: 'auto'
       });
+
+      test_interpolation({
+        property: 'offset-anchor',
+        from: neutralKeyframe,
+        to: '20px 20px',
+      }, [
+        {at: -0.3, expect: '7px 33px'},
+        {at: 0, expect: '10px 30px'},
+        {at: 0.3, expect: '13px 27px'},
+        {at: 0.6, expect: '16px 24px'},
+        {at: 1, expect: '20px 20px'},
+        {at: 1.5, expect: '25px 15px'},
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-anchor',
+        from: 'initial',
+        to: '60% 40%',
+      });
+
+      test_interpolation({
+        property: 'offset-anchor',
+        from: 'inherit',
+        to: '20px 20px',
+      }, [
+        {at: -0.3, expect: '33px 7px'},
+        {at: 0, expect: '30px 10px'},
+        {at: 0.3, expect: '27px 13px'},
+        {at: 0.6, expect: '24px 16px'},
+        {at: 1, expect: '20px 20px'},
+        {at: 1.5, expect: '15px 25px'},
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-anchor',
+        from: 'unset',
+        to: '50% 10px',
+      });
+
+      test_interpolation({
+        property: 'offset-anchor',
+        from: '0% 50%',
+        to: '100% 150%'
+      }, [
+        {at: -0.3, expect: '-30% 20%'},
+        {at: 0, expect: '0% 50%'},
+        {at: 0.3, expect: '30% 80%'},
+        {at: 0.6, expect: '60% 110%'},
+        {at: 1, expect: '100% 150%'},
+        {at: 1.5, expect: '150% 200%'}
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-anchor',
+        from: 'auto',
+        to: '20px 20px',
+      });
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-distance-interpolation.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-distance-interpolation.html
index 4912b9cf251..bc0c094a8e5 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-distance-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-distance-interpolation.html
@@ -10,6 +10,21 @@
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
   </head>
+  <style>
+    .parent {
+      offset-distance: 30px;
+    }
+    .target {
+      width: 10px;
+      height: 10px;
+      background-color: black;
+      offset-path: path("M0 0H 400");
+      offset-distance: 10px;
+    }
+    .expected {
+      background-color: green;
+    }
+  </style>
   <body>
     <script>
       test_interpolation({
@@ -50,6 +65,71 @@
         {at: 1, expect: 'calc(50px + 100%)'},
         {at: 2, expect: 'calc(130px + 180%)'}
       ]);
+
+      test_interpolation({
+        property: 'offset-distance',
+        from: neutralKeyframe,
+        to: '20px',
+      }, [
+        {at: -0.3, expect: '7px'},
+        {at: 0, expect: '10px'},
+        {at: 0.3, expect: '13px'},
+        {at: 0.6, expect: '16px'},
+        {at: 1, expect: '20px'},
+        {at: 1.5, expect: '25px'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-distance',
+        from: 'initial',
+        to: '20px',
+      }, [
+        {at: -0.3, expect: '-6px'},
+        {at: 0, expect: '0px'},
+        {at: 0.3, expect: '6px'},
+        {at: 0.6, expect: '12px'},
+        {at: 1, expect: '20px'},
+        {at: 1.5, expect: '30px'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-distance',
+        from: 'inherit',
+        to: '20px',
+      }, [
+        {at: -0.3, expect: '33px'},
+        {at: 0, expect: '30px'},
+        {at: 0.3, expect: '27px'},
+        {at: 0.6, expect: '24px'},
+        {at: 1, expect: '20px'},
+        {at: 1.5, expect: '15px'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-distance',
+        from: 'unset',
+        to: '20px',
+      }, [
+        {at: -0.3, expect: '-6px'},
+        {at: 0, expect: '0px'},
+        {at: 0.3, expect: '6px'},
+        {at: 0.6, expect: '12px'},
+        {at: 1, expect: '20px'},
+        {at: 1.5, expect: '30px'},
+      ]);
+
+      test_interpolation({
+        property: 'offset-distance',
+        from: '10px',
+        to: '100%',
+      }, [
+        {at: -0.3, expect: 'calc(13px + -30%)'},
+        {at: 0, expect: 'calc(0% + 10px)'},
+        {at: 0.3, expect: 'calc(7px + 30%)'},
+        {at: 0.6, expect: 'calc(4px + 60%)'},
+        {at: 1, expect: '100%'},
+        {at: 1.5, expect: 'calc(-5px + 150%)'},
+      ]);
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-interpolation.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-interpolation.html
new file mode 100644
index 00000000000..0d1ba1c8875
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-interpolation.html
@@ -0,0 +1,106 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-shorthand">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/css/support/interpolation-testcommon.js"></script>
+  </head>
+  <body>
+    <script>
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 200H 700") 500px 800deg',
+        to: 'path("M0 300H 700 Z") 600px 900deg',
+        method: 'CSS Transitions',
+      }, [
+        {at: -0.3, expect: 'path("M0 300H 700 Z") 470px 770deg'},
+        {at: 0, expect: 'path("M0 300H 700 Z") 500px 800deg'},
+        {at: 0.3, expect: 'path("M0 300H 700 Z") 530px 830deg'},
+        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
+        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
+        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
+      ]);
+
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 0H 200") 500px auto',
+        to: 'path("M0 0H 300") 600px 0deg',
+        method: 'CSS Transitions',
+      }, [
+        {at: -0.3, expect: 'path("M0 0H 170") 470px 0deg'},
+        {at: 0, expect: 'path("M0 0H 200") 500px 0deg'},
+        {at: 0.3, expect: 'path("M0 0H 230") 530px 0deg'},
+        {at: 0.6, expect: 'path("M0 0H 260") 560px 0deg'},
+        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
+        {at: 1.5, expect: 'path("M0 0H 350") 650px 0deg'},
+      ]);
+
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 200H 700") 500px 800deg',
+        to: 'path("M0 300H 700 Z") 600px 900deg',
+        method: 'CSS Animations',
+      }, [
+        {at: -0.3, expect: 'path("M0 200H 700") 470px 770deg'},
+        {at: 0, expect: 'path("M0 200H 700") 500px 800deg'},
+        {at: 0.3, expect: 'path("M0 200H 700") 530px 830deg'},
+        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
+        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
+        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
+      ]);
+
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 0H 200") 500px auto',
+        to: 'path("M0 0H 300") 600px 0deg',
+        method: 'CSS Animations',
+      }, [
+        {at: -0.3, expect: 'path("M0 0H 170") 470px auto'},
+        {at: 0, expect: 'path("M0 0H 200") 500px auto'},
+        {at: 0.3, expect: 'path("M0 0H 230") 530px auto'},
+        {at: 0.6, expect: 'path("M0 0H 260") 560px 0deg'},
+        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
+        {at: 1.5, expect: 'path("M0 0H 350") 650px 0deg'},
+      ]);
+
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 200H 700") 500px 800deg',
+        to: 'path("M0 300H 700 Z") 600px 900deg',
+        method: 'Web Animations',
+      }, [
+        {at: -0.3, expect: 'path("M0 200H 700") 470px 770deg'},
+        {at: 0, expect: 'path("M0 200H 700") 500px 800deg'},
+        {at: 0.3, expect: 'path("M0 200H 700") 530px 830deg'},
+        {at: 0.6, expect: 'path("M0 300H 700 Z") 560px 860deg'},
+        {at: 1, expect: 'path("M0 300H 700 Z") 600px 900deg'},
+        {at: 1.5, expect: 'path("M0 300H 700 Z") 650px 950deg'},
+      ]);
+
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 0V 200") 500px auto',
+        to: 'path("M0 0H 300") 600px 0deg',
+        method: 'Web Animations',
+      }, [
+        {at: -0.3, expect: 'path("M0 0V 200") 470px auto'},
+        {at: 0, expect: 'path("M0 0V 200") 500px auto'},
+        {at: 0.3, expect: 'path("M0 0V 200") 530px auto'},
+        {at: 0.6, expect: 'path("M0 0H 300") 560px 0deg'},
+        {at: 1, expect: 'path("M0 0H 300") 600px 0deg'},
+        {at: 1.5, expect: 'path("M0 0H 300") 650px 0deg'},
+      ]);
+
+      // Regression test for crbug.com/994489
+      test_interpolation({
+        property: 'offset',
+        from: 'path("M0 0H 200") 500px auto',
+        to: 'path("M0 0H 300") 600px 0deg',
+      }, [
+        {at: 3.40282e+038,  expect: 'path("M0 0H 3.4e+38") 3.36e+07px 0deg'},
+      ]);
+    </script>
+  </body>
+</html>
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 afe4bf57743..9924106f4b7 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
@@ -10,6 +10,14 @@
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
   </head>
+  <style>
+    .parent {
+      offset-path: ray(30deg closest-side);
+    }
+    .target {
+      offset-path: ray(10deg closest-side);
+    }
+  </style>
   <body>
     <script>
       'use strict';
@@ -26,6 +34,48 @@
         to: "none",
       });
 
+      // Neutral keyframes use the inline style.
+      test_interpolation({
+        property: 'offset-path',
+        from: neutralKeyframe,
+        to: 'ray(20deg closest-side)',
+      }, [
+        {at: -0.3, expect: 'ray(7deg closest-side)'},
+        {at: 0, expect: 'ray(10deg closest-side)'},
+        {at: 0.3, expect: 'ray(13deg closest-side)'},
+        {at: 0.6, expect: 'ray(16deg closest-side)'},
+        {at: 1, expect: 'ray(20deg closest-side)'},
+        {at: 1.5, expect: 'ray(25deg closest-side)'},
+      ]);
+
+      // No interpolation to a ray from the initial value 'none'.
+      test_no_interpolation({
+        property: 'offset-path',
+        from: 'initial',
+        to: 'ray(20deg closest-side)',
+      });
+
+      // 'inherit' keyframes use the parent style.
+      test_interpolation({
+        property: 'offset-path',
+        from: 'inherit',
+        to: 'ray(20deg closest-side)',
+      }, [
+        {at: -0.3, expect: 'ray(33deg closest-side)'},
+        {at: 0, expect: 'ray(30deg closest-side)'},
+        {at: 0.3, expect: 'ray(27deg closest-side)'},
+        {at: 0.6, expect: 'ray(24deg closest-side)'},
+        {at: 1, expect: 'ray(20deg closest-side)'},
+        {at: 1.5, expect: 'ray(15deg closest-side)'},
+      ]);
+
+      // No interpolation to a ray from the initial value 'none'.
+      test_no_interpolation({
+        property: 'offset-path',
+        from: 'unset',
+        to: 'ray(20deg closest-side)',
+      });
+
       // No interpolation to a ray from the initial value 'none'.
       test_no_interpolation({
         property: 'offset-path',
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-position-interpolation.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-position-interpolation.html
index 5ccca37dc30..9faaf9487af 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-position-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-position-interpolation.html
@@ -10,14 +10,11 @@
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
     <style>
-      body {
-        width: 500px;
-        height: 500px;
-        transform: rotate(0deg);
+      .parent {
+        offset-position: 30px 10px;
       }
-      div {
-        width: 10px;
-        height: 10px;
+      .target {
+        offset-position: 10px 30px;
       }
     </style>
   </head>
@@ -67,6 +64,63 @@
         from: 'right 10px top 20%',
         to: 'auto'
       });
+
+      test_interpolation({
+        property: 'offset-position',
+        from: neutralKeyframe,
+        to: '20px 20px',
+      }, [
+        {at: -0.3, expect: '7px 33px'},
+        {at: 0, expect: '10px 30px'},
+        {at: 0.3, expect: '13px 27px'},
+        {at: 0.6, expect: '16px 24px'},
+        {at: 1, expect: '20px 20px'},
+        {at: 1.5, expect: '25px 15px'},
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-position',
+        from: 'initial',
+        to: '20px 20px',
+      });
+
+      test_interpolation({
+        property: 'offset-position',
+        from: 'inherit',
+        to: '20px 20px',
+      }, [
+        {at: -0.3, expect: '33px 7px'},
+        {at: 0, expect: '30px 10px'},
+        {at: 0.3, expect: '27px 13px'},
+        {at: 0.6, expect: '24px 16px'},
+        {at: 1, expect: '20px 20px'},
+        {at: 1.5, expect: '15px 25px'},
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-position',
+        from: 'unset',
+        to: '20px 20px',
+      });
+
+      test_interpolation({
+        property: 'offset-position',
+        from: '0% 50%',
+        to: '100% 150%'
+      }, [
+        {at: -0.3, expect: '-30% 20%'},
+        {at: 0, expect: '0% 50%'},
+        {at: 0.3, expect: '30% 80%'},
+        {at: 0.6, expect: '60% 110%'},
+        {at: 1, expect: '100% 150%'},
+        {at: 1.5, expect: '150% 200%'}
+      ]);
+
+      test_no_interpolation({
+        property: 'offset-position',
+        from: 'auto',
+        to: '20px 20px',
+      });
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/motion/animation/offset-rotate-interpolation.html b/tests/wpt/web-platform-tests/css/motion/animation/offset-rotate-interpolation.html
index a55a005747f..55845108ebf 100644
--- a/tests/wpt/web-platform-tests/css/motion/animation/offset-rotate-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/motion/animation/offset-rotate-interpolation.html
@@ -10,6 +10,23 @@
     <script src="/resources/testharnessreport.js"></script>
     <script src="/css/support/interpolation-testcommon.js"></script>
   </head>
+  <style>
+    .parent {
+      offset-rotate: 30deg;
+    }
+    .target {
+      width: 80px;
+      height: 80px;
+      display: inline-block;
+      background-color: black;
+      margin-right: 5px;
+      offset-rotate: 10deg;
+    }
+    .expected {
+      background-color: green;
+      margin-right: 15px;
+    }
+  </style>
   <body>
     <script>
       test_interpolation({
@@ -89,6 +106,137 @@
         from: '6rad',
         to: 'auto',
       });
+
+      // Neutral keyframes use the inline style.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: neutralKeyframe,
+        to: '20deg',
+      }, [
+        {at: -0.3, expect: '7deg'},
+        {at: 0, expect: '10deg'},
+        {at: 0.3, expect: '13deg'},
+        {at: 0.6, expect: '16deg'},
+        {at: 1, expect: '20deg'},
+        {at: 1.5, expect: '25deg'},
+      ]);
+
+      // No interpolation to an angle from the initial value 'auto'.
+      test_no_interpolation({
+        property: 'offset-rotate',
+        from: 'initial',
+        to: '20deg',
+      });
+
+      // 'inherit' keyframes use the parent style.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: 'inherit',
+        to: '20deg',
+      }, [
+        {at: -0.3, expect: '33deg'},
+        {at: 0, expect: '30deg'},
+        {at: 0.3, expect: '27deg'},
+        {at: 0.6, expect: '24deg'},
+        {at: 1, expect: '20deg'},
+        {at: 1.5, expect: '15deg'},
+      ]);
+
+      // No interpolation to an angle from the initial value 'auto'.
+      test_no_interpolation({
+        property: 'offset-rotate',
+        from: 'unset',
+        to: '20deg',
+      });
+
+      // Interpolation between angles.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: '10deg',
+        to: '50deg'
+      }, [
+        {at: -0.3, expect: '-2deg'},
+        {at: 0, expect: '10deg'},
+        {at: 0.3, expect: '22deg'},
+        {at: 0.6, expect: '34deg'},
+        {at: 1, expect: '50deg'},
+        {at: 1.5, expect: '70deg'},
+      ]);
+
+      // Regression test for crbug.com/918430.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: '800deg',
+        to: '900deg'
+      }, [
+        {at: -3.40282e+38, expect: '-3.40282e+38deg'},
+      ]);
+
+      // Interpolation between auto angles.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: 'auto 10deg',
+        to: 'auto 50deg'
+      }, [
+        {at: -0.3, expect: 'auto -2deg'},
+        {at: 0, expect: 'auto 10deg'},
+        {at: 0.3, expect: 'auto 22deg'},
+        {at: 0.6, expect: 'auto 34deg'},
+        {at: 1, expect: 'auto 50deg'},
+        {at: 1.5, expect: 'auto 70deg'},
+      ]);
+
+      // 'reverse' is like 'auto 180deg'.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: 'reverse -170deg',
+        to: 'reverse -130deg'
+      }, [
+        {at: -0.3, expect: 'auto -2deg'},
+        {at: 0, expect: 'auto 10deg'},
+        {at: 0.3, expect: 'auto 22deg'},
+        {at: 0.6, expect: 'auto 34deg'},
+        {at: 1, expect: 'auto 50deg'},
+        {at: 1.5, expect: 'auto 70deg'},
+      ]);
+
+      // Interpolation between 'auto' and 'reverse'.
+      test_interpolation({
+        property: 'offset-rotate',
+        from: 'auto 10deg',
+        to: 'reverse -130deg'
+      }, [
+        {at: -0.3, expect: 'auto -2deg'},
+        {at: 0, expect: 'auto 10deg'},
+        {at: 0.3, expect: 'auto 22deg'},
+        {at: 0.6, expect: 'auto 34deg'},
+        {at: 1, expect: 'auto 50deg'},
+        {at: 1.5, expect: 'auto 70deg'},
+      ]);
+      test_interpolation({
+        property: 'offset-rotate',
+        from: 'reverse -170deg',
+        to: 'auto 50deg'
+      }, [
+        {at: -0.3, expect: 'auto -2deg'},
+        {at: 0, expect: 'auto 10deg'},
+        {at: 0.3, expect: 'auto 22deg'},
+        {at: 0.6, expect: 'auto 34deg'},
+        {at: 1, expect: 'auto 50deg'},
+        {at: 1.5, expect: 'auto 70deg'},
+      ]);
+
+      // No interpolation between auto/reverse and angle.
+      test_no_interpolation({
+        property: 'offset-rotate',
+        from: 'auto 200deg',
+        to: '300deg'
+      });
+      test_no_interpolation({
+        property: 'offset-rotate',
+        from: '300deg',
+        to: 'reverse 20deg'
+      });
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/support/interpolation-testcommon.js b/tests/wpt/web-platform-tests/css/support/interpolation-testcommon.js
index 62f40790dbd..e7ee011cdb4 100644
--- a/tests/wpt/web-platform-tests/css/support/interpolation-testcommon.js
+++ b/tests/wpt/web-platform-tests/css/support/interpolation-testcommon.js
@@ -11,14 +11,12 @@
     return keyframe === neutralKeyframe;
   }
 
-  // For all the CSS interpolation methods, we set the animation duration very
-  // very long so that any advancement in time that does happen is irrelevant
-  // in terms of the progress value. In particular, the animation duration is
-  // 2e9s which is ~63 years.
-  // We then set the delay to be *negative* half the duration, so we are
-  // immediately at the halfway point of the animation. Finally, we using an
-  // easing function that maps halfway (0.5) to whatever progress we actually
-  // want.
+  // For the CSS interpolation methods, we set the animation duration long
+  // enough that any advancement in time during the test is irrelevant in terms
+  // of the progress. We then set the delay to be negative half the duration, so
+  // we are immediately at the halfway point of the animation. Finally, we use
+  // an easing function that maps halfway to whatever progress we actually want.
+
   var cssAnimationsInterpolation = {
     name: 'CSS Animations',
     supportsProperty: function() {return true;},
@@ -233,12 +231,15 @@
     var property = interpolationTest.options.property;
     var from = interpolationTest.options.from;
     var to = interpolationTest.options.to;
+    var comparisonFunction = interpolationTest.options.comparisonFunction;
+
     if ((interpolationTest.options.method && interpolationTest.options.method != interpolationMethod.name)
       || !interpolationMethod.supportsProperty(property)
       || !interpolationMethod.supportsValue(from)
       || !interpolationMethod.supportsValue(to)) {
       return;
     }
+
     var testText = `${interpolationMethod.name}: property <${property}> from ${keyframeText(from)} to ${keyframeText(to)}`;
     var testContainer = createElement(interpolationMethodContainer, 'div');
     createElement(testContainer);
@@ -246,6 +247,14 @@
     if (expectations === expectNoInterpolation) {
       expectations = interpolationMethod.nonInterpolationExpectations(from, to);
     }
+
+    // Setup a standard equality function if an override is not provided.
+    if (!comparisonFunction) {
+      comparisonFunction = (actual, expected) => {
+        assert_equals(normalizeValue(actual), normalizeValue(expected));
+      };
+    }
+
     return expectations.map(function(expectation) {
       var actualTargetContainer = createTargetContainer(testContainer, 'actual');
       var expectedTargetContainer = createTargetContainer(testContainer, 'expected');
@@ -270,9 +279,9 @@
             assert_true(CSS.supports(property, underlying), '\'underlying\' value should be supported');
           }
 
-          assert_equals(
-            normalizeValue(getComputedStyle(target).getPropertyValue(property)),
-            normalizeValue(expectedValue));
+          comparisonFunction(
+              getComputedStyle(target).getPropertyValue(property),
+              expectedValue);
         }, `${testText} at (${expectation.at}) should be [${sanitizeUrls(expectedValue)}]`);
       };
       return target;
@@ -314,6 +323,7 @@
     container.remove();
     interpolationTests = [];
   }
+
   window.test_interpolation = test_interpolation;
   window.test_no_interpolation = test_no_interpolation;
   window.neutralKeyframe = neutralKeyframe;
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_chain_ini.html b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_chain_ini.html
new file mode 100644
index 00000000000..69dc018f389
--- /dev/null
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/reftest/reftest_fuzzy_chain_ini.html
@@ -0,0 +1,2 @@
+[reftest_fuzzy_chain_ini.html]
+  fuzzy: maxDifference=255;100-100
diff --git a/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2.html b/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2.html
new file mode 100644
index 00000000000..cdaf6446ed4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<!-- This will only match with the fuzzy set in the ini file -->
+<link rel="match" href="fuzzy-ref-2a.html">
+<style>
+div {
+  width: 100px;
+  height: 100px;
+  background-color: green;
+}
+</style>
+<div></div>
diff --git a/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2a.html b/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2a.html
new file mode 100644
index 00000000000..99da3203afb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/infrastructure/reftest/fuzzy-ref-2a.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<style>
+div {
+  width: 101px;
+  height: 100px;
+  background-color: green;
+}
+</style>
+<div></div>
diff --git a/tests/wpt/web-platform-tests/infrastructure/reftest/reftest_fuzzy_chain_ini.html b/tests/wpt/web-platform-tests/infrastructure/reftest/reftest_fuzzy_chain_ini.html
new file mode 100644
index 00000000000..4353379ddb4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/infrastructure/reftest/reftest_fuzzy_chain_ini.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<link rel=match href=fuzzy-ref-2.html>
+<!-- The metadata is added to the corresponding ini file -->
+<style>
+div {
+  width: 99px;
+  height: 100px;
+  background-color: green;
+}
+</style>
+<div></div>
diff --git a/tests/wpt/web-platform-tests/interfaces/element-timing.idl b/tests/wpt/web-platform-tests/interfaces/element-timing.idl
index cf56426fb6e..6a54bbd2af6 100644
--- a/tests/wpt/web-platform-tests/interfaces/element-timing.idl
+++ b/tests/wpt/web-platform-tests/interfaces/element-timing.idl
@@ -3,6 +3,7 @@
 // (https://github.com/tidoust/reffy-reports)
 // Source: Element Timing API (https://wicg.github.io/element-timing/)
 
+[Exposed=Window]
 interface PerformanceElementTiming : PerformanceEntry {
     readonly attribute DOMHighResTimeStamp renderTime;
     readonly attribute DOMHighResTimeStamp loadTime;
diff --git a/tests/wpt/web-platform-tests/interfaces/largest-contentful-paint.idl b/tests/wpt/web-platform-tests/interfaces/largest-contentful-paint.idl
index d2c69c47575..d3cfd56bafd 100644
--- a/tests/wpt/web-platform-tests/interfaces/largest-contentful-paint.idl
+++ b/tests/wpt/web-platform-tests/interfaces/largest-contentful-paint.idl
@@ -3,6 +3,7 @@
 // (https://github.com/tidoust/reffy-reports)
 // Source: Largest Contentful Paint (https://wicg.github.io/largest-contentful-paint/)
 
+[Exposed=Window]
 interface LargestContentfulPaint : PerformanceEntry {
     readonly attribute DOMHighResTimeStamp renderTime;
     readonly attribute DOMHighResTimeStamp loadTime;
diff --git a/tests/wpt/web-platform-tests/interfaces/layout-instability.idl b/tests/wpt/web-platform-tests/interfaces/layout-instability.idl
index c46151a923d..0cd2262a9f3 100644
--- a/tests/wpt/web-platform-tests/interfaces/layout-instability.idl
+++ b/tests/wpt/web-platform-tests/interfaces/layout-instability.idl
@@ -3,6 +3,7 @@
 // (https://github.com/tidoust/reffy-reports)
 // Source: Layout Instability API (https://wicg.github.io/layout-instability/)
 
+[Exposed=Window]
 interface LayoutShift : PerformanceEntry {
   readonly attribute long value;
   readonly attribute boolean hadRecentInput;
diff --git a/tests/wpt/web-platform-tests/interfaces/longtasks.idl b/tests/wpt/web-platform-tests/interfaces/longtasks.idl
index 333b842f86e..ef3f660038b 100644
--- a/tests/wpt/web-platform-tests/interfaces/longtasks.idl
+++ b/tests/wpt/web-platform-tests/interfaces/longtasks.idl
@@ -3,11 +3,13 @@
 // (https://github.com/tidoust/reffy-reports)
 // Source: Long Tasks API 1 (https://w3c.github.io/longtasks/)
 
+[Exposed=Window]
 interface PerformanceLongTaskTiming : PerformanceEntry {
     readonly attribute FrozenArray<TaskAttributionTiming> attribution;
     [Default] object toJSON();
 };
 
+[Exposed=Window]
 interface TaskAttributionTiming : PerformanceEntry {
     readonly attribute DOMString containerType;
     readonly attribute DOMString containerSrc;
diff --git a/tests/wpt/web-platform-tests/interfaces/media-playback-quality.idl b/tests/wpt/web-platform-tests/interfaces/media-playback-quality.idl
index 12b2c74e618..5a93de9f06c 100644
--- a/tests/wpt/web-platform-tests/interfaces/media-playback-quality.idl
+++ b/tests/wpt/web-platform-tests/interfaces/media-playback-quality.idl
@@ -7,6 +7,7 @@ partial interface HTMLVideoElement {
   VideoPlaybackQuality getVideoPlaybackQuality();
 };
 
+[Exposed=Window]
 interface VideoPlaybackQuality {
   readonly attribute DOMHighResTimeStamp creationTime;
   readonly attribute unsigned long corruptedVideoFrames;
diff --git a/tests/wpt/web-platform-tests/interfaces/screen-capture.idl b/tests/wpt/web-platform-tests/interfaces/screen-capture.idl
index f22f7a9a810..b5b0067650d 100644
--- a/tests/wpt/web-platform-tests/interfaces/screen-capture.idl
+++ b/tests/wpt/web-platform-tests/interfaces/screen-capture.idl
@@ -4,7 +4,7 @@
 // Source: Screen Capture (https://w3c.github.io/mediacapture-screen-share/)
 
 partial interface MediaDevices {
-    Promise<MediaStream> getDisplayMedia(optional DisplayMediaStreamConstraints constraints);
+    Promise<MediaStream> getDisplayMedia (optional DisplayMediaStreamConstraints constraints = {});
 };
 
 dictionary DisplayMediaStreamConstraints {
diff --git a/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl b/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
index 21013919a5d..f2560d9ffc8 100644
--- a/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
+++ b/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
@@ -22,7 +22,7 @@ dictionary ScrollTimelineOptions {
 };
 
 [Exposed=Window,
- Constructor(optional ScrollTimelineOptions options)]
+ Constructor(optional ScrollTimelineOptions options = {})]
 interface ScrollTimeline : AnimationTimeline {
   readonly attribute Element scrollSource;
   readonly attribute ScrollDirection orientation;
diff --git a/tests/wpt/web-platform-tests/interfaces/touch-events.idl b/tests/wpt/web-platform-tests/interfaces/touch-events.idl
index 17be1b46b37..1a8c9d7d24e 100644
--- a/tests/wpt/web-platform-tests/interfaces/touch-events.idl
+++ b/tests/wpt/web-platform-tests/interfaces/touch-events.idl
@@ -45,6 +45,7 @@ interface Touch {
     readonly        attribute TouchType touchType;
 };
 
+[Exposed=Window]
 interface TouchList {
     readonly        attribute unsigned long length;
     getter Touch? item(unsigned long index);
@@ -56,15 +57,15 @@ dictionary TouchEventInit : EventModifierInit {
              sequence<Touch> changedTouches = [];
 };
 
-[Constructor(DOMString type, optional TouchEventInit eventInitDict), Exposed=Window]
+[Constructor(DOMString type, optional TouchEventInit eventInitDict = {}), Exposed=Window]
 interface TouchEvent : UIEvent {
     readonly        attribute TouchList touches;
     readonly        attribute TouchList targetTouches;
     readonly        attribute TouchList changedTouches;
-    readonly        attribute boolean altKey;
-    readonly        attribute boolean metaKey;
-    readonly        attribute boolean ctrlKey;
-    readonly        attribute boolean shiftKey;
+    readonly        attribute boolean   altKey;
+    readonly        attribute boolean   metaKey;
+    readonly        attribute boolean   ctrlKey;
+    readonly        attribute boolean   shiftKey;
 };
 
 partial interface mixin GlobalEventHandlers {
diff --git a/tests/wpt/web-platform-tests/interfaces/web-animations.idl b/tests/wpt/web-platform-tests/interfaces/web-animations.idl
index 0fc5b47a976..72ac87f3e33 100644
--- a/tests/wpt/web-platform-tests/interfaces/web-animations.idl
+++ b/tests/wpt/web-platform-tests/interfaces/web-animations.idl
@@ -13,7 +13,7 @@ dictionary DocumentTimelineOptions {
 };
 
 [Exposed=Window,
- Constructor(optional DocumentTimelineOptions options)]
+ Constructor(optional DocumentTimelineOptions options = {})]
 interface DocumentTimeline : AnimationTimeline {
 };
 
@@ -53,7 +53,7 @@ enum AnimationReplaceState { "active", "removed", "persisted" };
 interface AnimationEffect {
     EffectTiming         getTiming();
     ComputedEffectTiming getComputedTiming();
-    void                 updateTiming(optional OptionalEffectTiming timing);
+    void                 updateTiming(optional OptionalEffectTiming timing = {});
 };
 
 dictionary EffectTiming {
@@ -93,7 +93,7 @@ dictionary ComputedEffectTiming : EffectTiming {
 [Exposed=Window,
  Constructor((Element or CSSPseudoElement)? target,
              object? keyframes,
-             optional (unrestricted double or KeyframeEffectOptions) options),
+             optional (unrestricted double or KeyframeEffectOptions) options = {}),
  Constructor(KeyframeEffect source)]
 interface KeyframeEffect : AnimationEffect {
     attribute (Element or CSSPseudoElement)? target;
@@ -135,8 +135,8 @@ enum CompositeOperationOrAuto { "replace", "add", "accumulate", "auto" };
 
 interface mixin Animatable {
     Animation           animate(object? keyframes,
-                                optional (unrestricted double or KeyframeAnimationOptions) options);
-    sequence<Animation> getAnimations(optional GetAnimationsOptions options);
+                                optional (unrestricted double or KeyframeAnimationOptions) options = {});
+    sequence<Animation> getAnimations(optional GetAnimationsOptions options = {});
 };
 
 dictionary KeyframeAnimationOptions : KeyframeEffectOptions {
@@ -160,7 +160,7 @@ Element includes Animatable;
 CSSPseudoElement includes Animatable;
 
 [Exposed=Window,
- Constructor(DOMString type, optional AnimationPlaybackEventInit eventInitDict)]
+ Constructor(DOMString type, optional AnimationPlaybackEventInit eventInitDict = {})]
 interface AnimationPlaybackEvent : Event {
     readonly attribute double? currentTime;
     readonly attribute double? timelineTime;
diff --git a/tests/wpt/web-platform-tests/interfaces/webmidi.idl b/tests/wpt/web-platform-tests/interfaces/webmidi.idl
index 58d6357f736..0dfcb7771a8 100644
--- a/tests/wpt/web-platform-tests/interfaces/webmidi.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webmidi.idl
@@ -4,7 +4,7 @@
 // Source: Web MIDI API (http://webaudio.github.io/web-midi-api/)
 
 partial interface Navigator {
-  [SecureContext] Promise<MIDIAccess> requestMIDIAccess(optional MIDIOptions options);
+  [SecureContext] Promise <MIDIAccess> requestMIDIAccess(optional MIDIOptions options = {});
 };
 
 dictionary MIDIOptions {
@@ -12,22 +12,22 @@ dictionary MIDIOptions {
   boolean software;
 };
 
-[SecureContext] interface MIDIInputMap {
+[SecureContext, Exposed=Window] interface MIDIInputMap {
   readonly maplike<DOMString, MIDIInput>;
 };
 
-[SecureContext] interface MIDIOutputMap {
+[SecureContext, Exposed=Window] interface MIDIOutputMap {
   readonly maplike<DOMString, MIDIOutput>;
 };
 
-[SecureContext] interface MIDIAccess : EventTarget {
+[SecureContext, Exposed=Window] interface MIDIAccess : EventTarget {
   readonly attribute MIDIInputMap inputs;
   readonly attribute MIDIOutputMap outputs;
   attribute EventHandler onstatechange;
   readonly attribute boolean sysexEnabled;
 };
 
-[SecureContext] interface MIDIPort : EventTarget {
+[SecureContext, Exposed=Window] interface MIDIPort : EventTarget {
   readonly attribute DOMString id;
   readonly attribute DOMString? manufacturer;
   readonly attribute DOMString? name;
@@ -40,11 +40,11 @@ dictionary MIDIOptions {
   Promise<MIDIPort> close();
 };
 
-[SecureContext] interface MIDIInput : MIDIPort {
+[SecureContext, Exposed=Window] interface MIDIInput : MIDIPort {
   attribute EventHandler onmidimessage;
 };
 
-[SecureContext] interface MIDIOutput : MIDIPort {
+[SecureContext, Exposed=Window] interface MIDIOutput : MIDIPort {
   void send(sequence<octet> data, optional DOMHighResTimeStamp timestamp = 0);
   void clear();
 };
@@ -65,7 +65,7 @@ enum MIDIPortConnectionState {
   "pending",
 };
 
-[SecureContext, Constructor(DOMString type, optional MIDIMessageEventInit eventInitDict)]
+[SecureContext, Exposed=Window, Constructor(DOMString type, optional MIDIMessageEventInit eventInitDict = {})]
 interface MIDIMessageEvent : Event {
   readonly attribute Uint8Array data;
 };
@@ -74,7 +74,7 @@ dictionary MIDIMessageEventInit : EventInit {
   Uint8Array data;
 };
 
-[SecureContext, Constructor(DOMString type, optional MIDIConnectionEventInit eventInitDict)]
+[SecureContext, Exposed=Window, Constructor(DOMString type, optional MIDIConnectionEventInit eventInitDict = {})]
 interface MIDIConnectionEvent : Event {
   readonly attribute MIDIPort port;
 };
diff --git a/tests/wpt/web-platform-tests/resource-timing/cors-preflight.any.js b/tests/wpt/web-platform-tests/resource-timing/cors-preflight.any.js
new file mode 100644
index 00000000000..5bbf3d2a234
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resource-timing/cors-preflight.any.js
@@ -0,0 +1,33 @@
+// META: script=/common/utils.js
+// META: script=/common/get-host-info.sub.js
+
+// Because apache decrements the Keep-Alive max value on each request, the
+// transferSize will vary slightly between requests for the same resource.
+const fuzzFactor = 3;  // bytes
+
+const hostInfo = get_host_info();
+const url = new URL('/resource-timing/resources/preflight.py', hostInfo['HTTP_REMOTE_ORIGIN']).href;
+
+// The header bytes are expected to be > |minHeaderSize| and
+// < |maxHeaderSize|. If they are outside this range the test will fail.
+const minHeaderSize = 100;
+const maxHeaderSize = 1024;
+
+function checkResourceSizes() {
+  const entries = performance.getEntriesByName(url);
+  assert_equals(entries.length, 2, 'Wrong number of entries');
+  assert_greater_than(entries[0].transferSize, 0, 'No-preflight transferSize');
+  const lowerBound = entries[0].transferSize - fuzzFactor;
+  const upperBound = entries[0].transferSize + fuzzFactor;
+  assert_between_exclusive(entries[1].transferSize, lowerBound, upperBound, 'Preflighted transferSize');
+}
+
+promise_test(() => {
+  const eatBody = response => response.arrayBuffer();
+  const requirePreflight = {headers: {'X-Require-Preflight' : '1'}};
+  return fetch(url)
+      .then(eatBody)
+      .then(() => fetch(url, requirePreflight))
+      .then(eatBody)
+      .then(checkResourceSizes);
+}, 'PerformanceResourceTiming sizes fetch with preflight test');
diff --git a/tests/wpt/web-platform-tests/resource-timing/resources/preflight.py b/tests/wpt/web-platform-tests/resource-timing/resources/preflight.py
new file mode 100644
index 00000000000..4fca99d0717
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resource-timing/resources/preflight.py
@@ -0,0 +1,8 @@
+def main(request, response):
+    response.headers.set("Access-Control-Allow-Origin", "*");
+    response.headers.set("Access-Control-Max-Age", "0");
+    response.headers.set("Timing-Allow-Origin", "*");
+    # If this script is accessed with the header X-Require-Preflight then the
+    # browser will send a preflight request. Otherwise it won't.
+    if request.method == 'OPTIONS':
+        response.headers.set("Access-Control-Allow-Headers", "X-Require-Preflight");
diff --git a/tests/wpt/web-platform-tests/tools/ci/run_tc.py b/tests/wpt/web-platform-tests/tools/ci/run_tc.py
index 1cfb41fcaab..240517a1ff6 100755
--- a/tests/wpt/web-platform-tests/tools/ci/run_tc.py
+++ b/tests/wpt/web-platform-tests/tools/ci/run_tc.py
@@ -109,7 +109,7 @@ def get_parser():
 def start_userspace_oom_killer():
     # Start userspace OOM killer: https://github.com/rfjakob/earlyoom
     # It will report memory usage every minute and prefer to kill browsers.
-    start(["sudo", "earlyoom", "-p", "-r", "60" "--prefer=(chrome|firefox)", "--avoid=python"])
+    start(["sudo", "earlyoom", "-p", "-r", "60", "--prefer=(chrome|firefox)", "--avoid=python"])
 
 
 def make_hosts_file():
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/test_pipes.py b/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/test_pipes.py
index bad4d624c9f..a6a703e3049 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/test_pipes.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/test_pipes.py
@@ -102,6 +102,10 @@ server: http://localhost:{0}""".format(self.server.port).encode("ascii")
         resp = self.request("/sub_url_base.sub.txt")
         self.assertEqual(resp.read().rstrip(), b"Before / After")
 
+    def test_sub_url_base_via_filename_with_query(self):
+        resp = self.request("/sub_url_base.sub.txt?pipe=slice(5,10)")
+        self.assertEqual(resp.read().rstrip(), b"e / A")
+
     def test_sub_uuid(self):
         resp = self.request("/sub_uuid.sub.txt")
         self.assertRegexpMatches(resp.read().rstrip(), b"Before [a-f0-9-]+ After")
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
index e846ff807a6..ca5118009cf 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
@@ -105,17 +105,21 @@ class DirectoryHandler(object):
 
 def wrap_pipeline(path, request, response):
     query = parse_qs(request.url_parts.query)
+    pipe_string = ""
 
-    pipeline = None
-    if "pipe" in query:
-        pipeline = Pipeline(query["pipe"][-1])
-    elif ".sub." in path:
+    if ".sub." in path:
         ml_extensions = {".html", ".htm", ".xht", ".xhtml", ".xml", ".svg"}
         escape_type = "html" if os.path.splitext(path)[1] in ml_extensions else "none"
-        pipeline = Pipeline("sub(%s)" % escape_type)
+        pipe_string = "sub(%s)" % escape_type
 
-    if pipeline is not None:
-        response = pipeline(request, response)
+    if "pipe" in query:
+        if pipe_string:
+            pipe_string += "|"
+
+        pipe_string += query["pipe"][-1]
+
+    if pipe_string:
+        response = Pipeline(pipe_string)(request, response)
 
     return response
 
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
index 9f8c983d498..ab2aaf4e75d 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
@@ -168,10 +168,10 @@ def current_session():
 
 @pytest.fixture
 def url(server_config):
-    def inner(path, protocol="http", subdomain="", query="", fragment=""):
-        domain = server_config["domains"][""][subdomain]
+    def inner(path, protocol="http", domain="", subdomain="", query="", fragment=""):
+        domain = server_config["domains"][domain][subdomain]
         port = server_config["ports"][protocol][0]
-        host = "%s:%s" % (domain, port)
+        host = "{0}:{1}".format(domain, port)
         return urlparse.urlunsplit((protocol, host, path, query, fragment))
 
     inner.__name__ = "url"
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py b/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py
index 3e5bab191a8..4425a3ab901 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py
@@ -1,11 +1,10 @@
+from urlparse import urlparse
+
 import webdriver.protocol as protocol
 
 from tests.support.asserts import assert_success
 from tests.support.helpers import document_location
-from tests.support.inline import (
-    iframe,
-    inline,
-)
+from tests.support.inline import iframe, inline
 
 
 """
@@ -29,32 +28,37 @@ def switch_to_frame(session, frame):
 
 
 def test_cross_origin_iframe(session, server_config):
-    session.url = inline(iframe("", subdomain="www"))
+    session.url = inline(iframe("", domain="alt"))
     frame_element = session.find.css("iframe", all=False)
 
     response = switch_to_frame(session, frame_element)
-    value = assert_success(response)
-    assert document_location(session).startswith(
-        "http://www.{}".format(server_config["browser_host"]))
+    assert_success(response)
+
+    parse_result = urlparse(document_location(session))
+    assert parse_result.netloc != server_config["browser_host"]
 
 
 def test_nested_cross_origin_iframe(session, server_config):
-    frame2 = iframe("", subdomain="www.www")
-    frame1 = iframe(frame2, subdomain="www")
-    top_doc = inline(frame1, subdomain="")
+    frame2 = iframe("", domain="alt", subdomain="www")
+    frame1 = iframe(frame2)
+    top_doc = inline(frame1, domain="alt")
 
     session.url = top_doc
-    assert document_location(session).startswith(
-        "http://{}".format(server_config["browser_host"]))
 
-    frame1_el = session.find.css("iframe", all=False)
-    response = switch_to_frame(session, frame1_el)
-    value = assert_success(response)
-    assert document_location(session).startswith(
-        "http://www.{}".format(server_config["browser_host"]))
+    parse_result = urlparse(document_location(session))
+    top_level_host = parse_result.netloc
+    assert not top_level_host.startswith(server_config["browser_host"])
+
+    frame1_element = session.find.css("iframe", all=False)
+    response = switch_to_frame(session, frame1_element)
+    assert_success(response)
+
+    parse_result = urlparse(document_location(session))
+    assert parse_result.netloc.startswith(server_config["browser_host"])
 
     frame2_el = session.find.css("iframe", all=False)
     response = switch_to_frame(session, frame2_el)
-    value = assert_success(response)
-    assert document_location(session).startswith(
-        "http://www.www.{}".format(server_config["browser_host"]))
+    assert_success(response)
+
+    parse_result = urlparse(document_location(session))
+    assert parse_result.netloc == "www.{}".format(top_level_host)
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCIceTransport.html b/tests/wpt/web-platform-tests/webrtc/RTCIceTransport.html
index 6a00e1c59e7..94dc1c461fb 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCIceTransport.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCIceTransport.html
@@ -81,7 +81,6 @@
 
     assert_equals(typeof param.usernameFragment, 'string',
       'Expect param.usernameFragment to be set with string value');
-
     assert_equals(typeof param.password, 'string',
       'Expect param.password to be set with string value');
   }
@@ -90,7 +89,7 @@
     const { state, gatheringState, role, component } = iceTransport;
 
     assert_true(role === 'controlling' || role === 'controlled',
-      'Expect RTCIceRole to be either controlling or controlled');
+      'Expect RTCIceRole to be either controlling or controlled, found ' + role);
 
     assert_true(component === 'rtp' || component === 'rtcp',
       'Expect RTCIceComponent to be either rtp or rtcp');
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
index 282771153c4..c0ce25eb76b 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
@@ -313,6 +313,54 @@ for (let bundle_policy of ['balanced', 'max-bundle', 'max-compat']) {
                     'PC.iceConnectionState:');
     }, 'iceConnectionState changes at the right time, with bundle policy ' +
                  bundle_policy);
+}
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+  pc1.onicecandidate = async e => {
+    if (e.candidate) {
+      await pc2.addIceCandidate(e.candidate);
+    }
+  };
+  pc1.candidateBuffer = [];
+  pc2.onicecandidate = e => {
+    // Don't add candidate if candidate buffer is already used
+    if (e.candidate && pc1.candidateBuffer) {
+      pc1.candidateBuffer.push(e.candidate)
+    }
+  };
+  pc1.iceStates = [pc1.iceConnectionState];
+  pc2.iceStates = [pc2.iceConnectionState];
+  pc1.oniceconnectionstatechange = () => {
+    pc1.iceStates.push(pc1.iceConnectionState);
+  };
+  pc2.oniceconnectionstatechange = () => {
+    pc2.iceStates.push(pc2.iceConnectionState);
+  };
+
+  const localStream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
+  const localStream2 = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
+  const remoteStream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
+  for (const stream of [localStream, localStream2, remoteStream]) {
+    t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
   }
+  localStream.getTracks().forEach(t => pc1.addTrack(t, localStream));
+  localStream2.getTracks().forEach(t => pc1.addTrack(t, localStream2));
+  remoteStream.getTracks().forEach(t => pc2.addTrack(t, remoteStream));
+  const offer = await pc1.createOffer();
+  await pc2.setRemoteDescription(offer);
+  await pc1.setLocalDescription(offer);
+  const answer = await pc2.createAnswer();
+  await pc2.setLocalDescription(answer);
+  await pc1.setRemoteDescription(answer);
+  pc1.candidateBuffer.forEach(c => pc1.addIceCandidate(c));
+  delete pc1.candidateBuffer;
+  await listenToIceConnected(pc1);
+  assert_array_equals(pc1.iceStates, ['new', 'checking', 'connected']);
+  assert_array_equals(pc2.iceStates, ['new', 'checking', 'connected']);
+}, 'Responder ICE connection state behaves as expected');
 
 </script>
diff --git a/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_optionalFeatures.https.html b/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_optionalFeatures.https.html
index c274f4ff713..0071b81e828 100644
--- a/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_optionalFeatures.https.html
+++ b/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_optionalFeatures.https.html
@@ -19,9 +19,15 @@
       }, TRACKED_IMMERSIVE_DEVICE, 'immersive-vr', {requiredFeatures: [], optionalFeatures: []});
 
     xr_session_promise_test(
-      "Tests requestSession ignores unknown optionalFeatures",
+      "Tests requestSession ignores unknown strings in optionalFeatures",
       (session) => {
         assert_not_equals(session, null);
       }, TRACKED_IMMERSIVE_DEVICE, 'immersive-vr', {optionalFeatures: ['unicorns']});
+
+    xr_session_promise_test(
+      "Tests requestSession ignores unknown objects in optionalFeatures",
+      (session) => {
+        assert_not_equals(session, null);
+      }, TRACKED_IMMERSIVE_DEVICE, 'immersive-vr', {optionalFeatures: [{ unicorns: "please" }]});
   </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_requiredFeatures_unknown.https.html b/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_requiredFeatures_unknown.https.html
index 02b26c05cb5..9fa8c31d63a 100644
--- a/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_requiredFeatures_unknown.https.html
+++ b/tests/wpt/web-platform-tests/webxr/xrDevice_requestSession_requiredFeatures_unknown.https.html
@@ -18,7 +18,15 @@
                 navigator.xr.requestSession('immersive-vr',
                                             {requiredFeatures: ['undefined-unicorns']}),
                 "unexpected requestSession success"
-              ))
+              ).then(() => {
+                return promise_rejects(
+                  t,
+                  "NotSupportedError",
+                  navigator.xr.requestSession('immersive-vr',
+                                            {requiredFeatures: [{unicorns: "please"}]}),
+                  "unexpected requestSession success with unknown object"
+                );
+              }));
             });
           }));
       });