diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-003.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-003.html.ini
deleted file mode 100644
index f29da48a2a0..00000000000
--- a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-003.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[hit-test-floats-003.html]
-  [Miss float below something else]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-005.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-005.html.ini
new file mode 100644
index 00000000000..baa9f1a7541
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-005.html.ini
@@ -0,0 +1,4 @@
+[hit-test-floats-005.html]
+  [Miss clipped float]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/detach-abspos-before-layout.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/detach-abspos-before-layout.html.ini
new file mode 100644
index 00000000000..4cc6e839ea4
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/detach-abspos-before-layout.html.ini
@@ -0,0 +1,4 @@
+[detach-abspos-before-layout.html]
+  [No crash or DCHECK failure]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini b/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
index 4a1e8110f6f..f8e7e539aae 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
@@ -2,3 +2,6 @@
   [Hit test intersecting scaled box]
     expected: FAIL
 
+  [Hit test within unscaled box]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
deleted file mode 100644
index 4c79907309b..00000000000
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[CaretPosition-001.html]
-  [Element at (400, 100)]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
new file mode 100644
index 00000000000..e181af5397f
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
@@ -0,0 +1,4 @@
+[elementsFromPoint-invalid-cases.html]
+  [The root element is the last element returned for otherwise empty queries within the viewport]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
index 7fb68f9aee4..b6cda2233a8 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
@@ -312,27 +312,24 @@
   [Response: combined response Content-Type: text/html;" \\" text/plain ";charset=GBK]
     expected: NOTRUN
 
-  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
index e67f0406fc3..d2df9b78483 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
@@ -53,3 +53,6 @@
   [combined text/javascript ]
     expected: FAIL
 
+  [separate text/javascript x/x]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/http-cache/split-cache.tentative.html.ini b/tests/wpt/metadata-layout-2020/fetch/http-cache/split-cache.html.ini
similarity index 53%
rename from tests/wpt/metadata/fetch/http-cache/split-cache.tentative.html.ini
rename to tests/wpt/metadata-layout-2020/fetch/http-cache/split-cache.html.ini
index a398c9b5cf7..45120a9f132 100644
--- a/tests/wpt/metadata/fetch/http-cache/split-cache.tentative.html.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/http-cache/split-cache.html.ini
@@ -1,10 +1,4 @@
-[split-cache.tentative.html]
-  [HTTP Cache - Partioning by top-level origin 1]
-    expected: FAIL
-
-  [HTTP Cache - Partioning by top-level origin 3]
-    expected: FAIL
-
+[split-cache.html]
   [HTTP cache is not shared between same-site frames with cross-site top-level frames]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
index 1c62485a210..58de838d890 100644
--- a/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -11,9 +11,6 @@
   [X-Content-Type-Options%3A%20nosniff%2C%2C%40%23%24%23%25%25%26%5E%26%5E*()()11!]
     expected: FAIL
 
-  [X-Content-Type-Options%3A%20%2Cnosniff]
-    expected: FAIL
-
-  [Content-Type-Options%3A%20nosniff]
+  [X-Content-Type-Options%3A%20%22nosniFF%22]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
deleted file mode 100644
index 385376c7321..00000000000
--- a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_4.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
index 09ae27d7480..5c3ac06f42a 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
@@ -171,6 +171,3 @@
   [XHTML img usemap="#hash-id"]
     expected: FAIL
 
-  [HTML (standards) IMG usemap="no-hash-name"]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 88f4ddd0e9a..42ebcc9d57e 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_escaping-1.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
index c6f45be1eb2..e63fe7c263e 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index d913fcbb129..3080be9afc0 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-1.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index 9eb581fcf1f..0407f0cc2b7 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-2.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index f4f994c5d6f..0fbc49ea1c1 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit.html.ini
deleted file mode 100644
index b193c33c2b6..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[form-double-submit.html]
-  [default submit action should supersede onclick submit()]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
deleted file mode 100644
index 178680e5d14..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[script-onerror-insertion-point-2.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
index 58c9d7f8c0c..57744023f73 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
@@ -1,5 +1,5 @@
 [ignore-opens-during-unload.window.html]
-  expected: TIMEOUT
+  expected: CRASH
   [document.open should bail out when ignore-opens-during-unload is greater than 0 during visibilitychange event (open(parent) while unloading parent and child)]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
index dbec6f2c2ff..450c88bd32b 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@@ -3,3 +3,6 @@
   [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
     expected: TIMEOUT
 
+  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini
new file mode 100644
index 00000000000..064cf47545b
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini
@@ -0,0 +1,5 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/without-ports/018.html.ini
deleted file mode 100644
index 663a1f8fa30..00000000000
--- a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/018.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 3ecdfaab54f..3b6a51280eb 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -11875,7 +11875,7 @@
       ]
      ],
      "cursor-auto-007.html": [
-      "6cf1495a02c42c49b1407fef0a22eb363cdf7d2b",
+      "0d355ad0d953dce9be2f42340d331f442af8fac2",
       [
        null,
        {}
@@ -131073,6 +131073,19 @@
        {}
       ]
      ],
+     "display-first-line-002.html": [
+      "fef1d0b001c3bf46d9c5eea6741dc804bd057c72",
+      [
+       null,
+       [
+        [
+         "/css/css-display/display-first-line-002-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "display-flow-root-001.html": [
       "3d1dcb020df129dd10d66bb4b04d62c3c280cfb6",
       [
@@ -152678,6 +152691,32 @@
         {}
        ]
       ],
+      "clip-path-document-element-will-change.html": [
+       "977eaca1405449fd1f79a01e9a5a91f2bb069b60",
+       [
+        null,
+        [
+         [
+          "/css/css-masking/clip-path/reference/clip-path-document-element-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "clip-path-document-element.html": [
+       "56f2d5c8ebb5114fc91a87b3bb240b36957a1800",
+       [
+        null,
+        [
+         [
+          "/css/css-masking/clip-path/reference/clip-path-document-element-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "clip-path-element-userSpaceOnUse-001.html": [
        "1381f53cb0c0aefc82a91a232b712d18be625b97",
        [
@@ -249992,7 +250031,7 @@
      []
     ],
     "get-host-info.sub.js": [
-     "1c28a7f476f67d513e4627b6133d0c2e0ffc867a",
+     "8f37d557583b99235b7a1fa903e54e96f90b9870",
      []
     ],
     "get-host-info.sub.js.headers": [
@@ -292194,6 +292233,10 @@
       "135bc04d8ee5c5e29045488728cc276f24c69832",
       []
      ],
+     "display-first-line-002-ref.html": [
+      "e82f6153a22befdbd33e2f106e9a8258f174d571",
+      []
+     ],
      "display-flow-root-001-ref.html": [
       "fcb5ac277ee72f8dd4d70d66b7b6ce736225940e",
       []
@@ -302690,6 +302733,10 @@
         "f718ea6abfbab54333ba674ff0dcd320d8672bcd",
         []
        ],
+       "clip-path-document-element-ref.html": [
+        "4608e54b2082aef805dce8b5bbff2c2cc82c41e9",
+        []
+       ],
        "clip-path-ellipse-ref.html": [
         "5adc91a5c00f27f0d3225c99a6c2534b5b868a8d",
         []
@@ -321701,7 +321748,7 @@
     ],
     "data": {
      "README.md": [
-      "606c67182ca35bccc65fc073d9cb8edfd2d5d17b",
+      "2ac414b280275ea7a5ad1f376b6fe65d1bb897fe",
       []
      ],
      "backcolor.js": [
@@ -321721,7 +321768,7 @@
       []
      ],
      "delete.js": [
-      "db53a3643f600da683a1df2f49e6e55d5b1e6d3d",
+      "00b61178c74b1704cfe18c7b3f00e98937ae98b2",
       []
      ],
      "fontname.js": [
@@ -321741,7 +321788,7 @@
       []
      ],
      "forwarddelete.js": [
-      "2b8829e6721b521b19af3c71740dd5b73c84fd36",
+      "b636a95e8a0e84608620e72fb7279a62de677477",
       []
      ],
      "hilitecolor.js": [
@@ -321769,7 +321816,7 @@
       []
      ],
      "insertlinebreak.js": [
-      "540b1b1e411945cfe2a95e59ccb0d66e0a0c8750",
+      "a29862ffd360ea01901fbe9c85dc87d1fc13b67d",
       []
      ],
      "insertorderedlist.js": [
@@ -321777,11 +321824,11 @@
       []
      ],
      "insertparagraph.js": [
-      "fcf9e855e1c311de2cee26e6f6d117b2da5f1fb4",
+      "2ffab8fd353c7ba7a20cfa1b5e2a3a0b1ab56c9b",
       []
      ],
      "inserttext.js": [
-      "4012510fcb6389a2f17647d5febb87b012ce883f",
+      "102da09211b6de90a49cd60410f8dcec16d08bb1",
       []
      ],
      "insertunorderedlist.js": [
@@ -321863,7 +321910,7 @@
       []
      ],
      "tests.js": [
-      "a03a68ed8dc80a94c79023247b14ad58c5f2e2d7",
+      "c18aef136b928b92ac90448a8181bc09c881d775",
       []
      ]
     }
@@ -337958,7 +338005,7 @@
      []
     ],
     "appmanifest.idl": [
-     "cf30b6127682f7f7f6a380cd1abafc1b2ad2c770",
+     "926a4fc2022e71c28aa4a2ae3d1adc12104ee1ab",
      []
     ],
     "audio-output.idl": [
@@ -338101,6 +338148,14 @@
      "b7d9c33d596c3882e14ffa2fa1dee99e087ecedf",
      []
     ],
+    "custom-state-pseudo-class.idl": [
+     "8fcd287acd337664d0878aaaac46453aa54f224d",
+     []
+    ],
+    "deprecation-reporting.idl": [
+     "e62711936b5ec9e6ee93e85c3e52e07462406957",
+     []
+    ],
     "device-memory.idl": [
      "f664013ddefea7bc8950f7604c06f53c1c1aac48",
      []
@@ -338442,7 +338497,7 @@
      []
     ],
     "streams.idl": [
-     "4dddbf41cbf7bca67b42f5bc6e58b0ffcd2e309c",
+     "35f558f624a83f3e2526e89b9be909a7883ecb08",
      []
     ],
     "text-detection-api.tentative.idl": [
@@ -349062,7 +349117,7 @@
      ]
     },
     "requirements_flake8.txt": [
-     "ae3e4f4b5a64e692fa9c2992f12dcaa0ca582cc2",
+     "f97916e03e97a742c8f8f664f8c4ac24c7e1327a",
      []
     ],
     "requirements_mypy.txt": [
@@ -386128,6 +386183,13 @@
         {}
        ]
       ],
+      "needs-layout-transform.html": [
+       "8a307b3b68d216521f87698417360a5657b92d79",
+       [
+        null,
+        {}
+       ]
+      ],
       "vertical-align-top-bottom-001.html": [
        "2e03bc0d2fbed51589545b0b62d0ccb3d161556d",
        [
@@ -386237,6 +386299,13 @@
         {}
        ]
       ],
+      "detach-abspos-before-layout.html": [
+       "27ee59ccc5073597ccba01b83ef8a590a8f751b9",
+       [
+        null,
+        {}
+       ]
+      ],
       "inline-static-position-001.html": [
        "b627fbcab58d0a988de8ef572f64a67c2929536b",
        [
@@ -389700,6 +389769,20 @@
        {}
       ]
      ],
+     "display-with-float-dynamic.html": [
+      "7cc2fefcc42f4fc0aa7b72fabbf2fc8df6c38048",
+      [
+       null,
+       {}
+      ]
+     ],
+     "display-with-float.html": [
+      "49f94799d93b58c77289d4ac35cb8b7d3239b4fa",
+      [
+       null,
+       {}
+      ]
+     ],
      "inheritance.html": [
       "bfd072651cb6ec82cca7d9be5b6768afbc39fca0",
       [
@@ -392833,7 +392916,7 @@
        ]
       ],
       "grid-baseline-004.html": [
-       "baabc70a3f477321f76dff59cfa2e73bcff8e165",
+       "7c3e46cfdbde7c982f76526d4b98611abd311e1e",
        [
         null,
         {}
@@ -394027,28 +394110,28 @@
        ]
       ],
       "grid-auto-fill-columns-001.html": [
-       "ed32ee55d5be7f19f468e2f772f3eb2fbbb2cde5",
+       "83ab583797dceb0a78f3692999606932706be67d",
        [
         null,
         {}
        ]
       ],
       "grid-auto-fill-rows-001.html": [
-       "afce3f5fa91a609f5a4f27f666e97565f4fbc8ee",
+       "d3078b7b3ad9ac633de08c4db0e66e784976db6b",
        [
         null,
         {}
        ]
       ],
       "grid-auto-fit-columns-001.html": [
-       "b1dab7e32f9dd98f14af9ff885cc688b465ed384",
+       "524bb209a569f066e994cfe3174ac9f2d2fd743a",
        [
         null,
         {}
        ]
       ],
       "grid-auto-fit-rows-001.html": [
-       "7619d9e023e2a7cbc9e7d5fb5d49730046bfbcf3",
+       "fef304b2188c07a69c9dd5d07dbb316dc1a18b8e",
        [
         null,
         {}
@@ -394216,7 +394299,7 @@
        ]
       ],
       "grid-support-grid-template-areas-001.html": [
-       "da29040b31b9780b34345a0173a4b7db5159a2df",
+       "ed4c500a1986008033acd16c435c75f02ba8751e",
        [
         null,
         {}
@@ -394684,7 +394767,7 @@
        ]
       ],
       "flex-and-intrinsic-sizes-001.html": [
-       "5144450dd8cb6106768d55088bd4900405be05ce",
+       "02e34071ec4d0f43378f17c3a2255295f267ac88",
        [
         null,
         {}
@@ -394788,6 +394871,13 @@
         {}
        ]
       ],
+      "grid-flex-track-intrinsic-sizes-003.html": [
+       "81a5d14131078c214b59f236838043870dda2512",
+       [
+        null,
+        {}
+       ]
+      ],
       "grid-intrinsic-size-with-orthogonal-items.html": [
        "4dfcd126d10e86bb9b2d2bb6bfc1f668f839c9ba",
        [
@@ -407910,6 +408000,13 @@
        {}
       ]
      ],
+     "rem-unit-root-element.html": [
+      "cfd7af17c4f0463e3df02b8d91a1f96c70511408",
+      [
+       null,
+       {}
+      ]
+     ],
      "rgba-011.html": [
       "84c317033063b72716e36cfd15466780e010ba11",
       [
@@ -412558,6 +412655,26 @@
      ]
     ]
    },
+   "custom-state-pseudo-class": {
+    "idlharness.window.js": [
+     "7ddbe315a60f3f448bb6fe2f1bf071afb8464fe6",
+     [
+      "custom-state-pseudo-class/idlharness.window.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "/resources/WebIDLParser.js"
+        ],
+        [
+         "script",
+         "/resources/idlharness.js"
+        ]
+       ]
+      }
+     ]
+    ]
+   },
    "delegated-ink": {
     "exception-thrown-bad-color.tentative.html": [
      "24e54c50bae567c3f1690378d1d62e8b68290e5e",
@@ -412592,6 +412709,41 @@
      ]
     ]
    },
+   "deprecation-reporting": {
+    "idlharness.any.js": [
+     "720bacfa3ff3f00e2b8dcc4e061924d2dc48e876",
+     [
+      "deprecation-reporting/idlharness.any.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "/resources/WebIDLParser.js"
+        ],
+        [
+         "script",
+         "/resources/idlharness.js"
+        ]
+       ]
+      }
+     ],
+     [
+      "deprecation-reporting/idlharness.any.worker.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "/resources/WebIDLParser.js"
+        ],
+        [
+         "script",
+         "/resources/idlharness.js"
+        ]
+       ]
+      }
+     ]
+    ]
+   },
    "device-memory": {
     "device-memory.https.any.js": [
      "4fe6f04ebc959e6468af5296ebc677c70a7cf170",
@@ -433478,7 +433630,7 @@
        }
       ]
      ],
-     "split-cache.tentative.html": [
+     "split-cache.html": [
       "4b04c9ff79bf951cce993c6dbcc556dc1e505c41",
       [
        null,
@@ -433967,10 +434119,12 @@
       ]
      ],
      "preserve-fragment.html": [
-      "72ed24c837f143191a08d6df69544c0601385863",
+      "682539a7445f2da6ec27d4b6a217d743c5c91915",
       [
        null,
-       {}
+       {
+        "timeout": "long"
+       }
       ]
      ]
     },
@@ -457973,6 +458127,13 @@
          {}
         ]
        ],
+       "flex-legend-float-abspos.html": [
+        "f6eead471cc076d20839a0e95be01b7742f199fa",
+        [
+         null,
+         {}
+        ]
+       ],
        "legend-align-justify-self.html": [
         "29df29d17778a9d3d592c5e942f093a44f419b3c",
         [
@@ -462008,7 +462169,7 @@
         ]
        ],
        "iframe-loading-lazy.tentative.html": [
-        "1a5f8f7407e3403888239325c0603b5ec4101ffd",
+        "51b442695e01e9496ee4f5754023f722e6636f36",
         [
          null,
          {}
@@ -462670,7 +462831,7 @@
         ]
        ],
        "image-loading-lazy-below-viewport-dynamic.html": [
-        "e27212cfd79c19c531efe44167f94a0730790a4b",
+        "7fc2c74214739206cfec69b1617d59a2f36b3b3d",
         [
          null,
          {}
@@ -462705,7 +462866,7 @@
         ]
        ],
        "image-loading-lazy-in-viewport-dynamic.html": [
-        "c9baceda5874285cd4a140786baef20598e7ee0e",
+        "982f09b8298bccee48b24c1774ef46a5d702dd22",
         [
          null,
          {}
@@ -462733,7 +462894,7 @@
         ]
        ],
        "image-loading-lazy-multicol.html": [
-        "1458fb44b7849fed9792170638381a11a45d22ab",
+        "e906681932dbe616eb58e2f889878b2f2fdfaa4e",
         [
          null,
          {}
@@ -475537,6 +475698,13 @@
         {}
        ]
       ],
+      "default-properties-on-the-math-root.html": [
+       "80a09774a7777fa104c861086e0f5ac971f07f05",
+       [
+        null,
+        {}
+       ]
+      ],
       "display-contents.html": [
        "aeaa28da908816ad39619d9a47bbb43a3116bbe9",
        [
@@ -513426,7 +513594,7 @@
      ]
     ],
     "request-video-frame-callback-webrtc.https.html": [
-     "b6131d6a808759346aa54b9e400e535b6c3ca29c",
+     "ce5b5ad6be699a917b3dce5559cdbfa8e334127d",
      [
       null,
       {}
@@ -518268,6 +518436,13 @@
         {}
        ]
       ],
+      "audiobuffersource-duration-loop.html": [
+       "faa70e11c4774991061e1d85a4a4b774e7368f5a",
+       [
+        null,
+        {}
+       ]
+      ],
       "audiobuffersource-ended.html": [
        "b9922f61ef399bf558a2f6d3c61154b9f14a512f",
        [
@@ -521261,10 +521436,12 @@
      ]
     ],
     "RTCPeerConnection-createDataChannel.html": [
-     "3d2169dffac65ffbc81355b33c4c904bf5e3f067",
+     "87867664b58a6787bd96cfb85559b4f1171e263f",
      [
       null,
-      {}
+      {
+       "timeout": "long"
+      }
      ]
     ],
     "RTCPeerConnection-createOffer.html": [
@@ -521312,7 +521489,7 @@
      ]
     ],
     "RTCPeerConnection-iceConnectionState.https.html": [
-     "851ce884d6ea12bf60761ef23f78cf197d594372",
+     "d3126065b99778f32b5e313211085d55c064fe1e",
      [
       null,
       {
@@ -521516,10 +521693,12 @@
      ]
     ],
     "RTCPeerConnection-setRemoteDescription-tracks.https.html": [
-     "59761c4c4bdca57141272b092fe56a917b612c7b",
+     "d2ee646e2c17c7d0aa1d632882838a07a6d5a685",
      [
       null,
-      {}
+      {
+       "timeout": "long"
+      }
      ]
     ],
     "RTCPeerConnection-setRemoteDescription.html": [
@@ -521761,14 +521940,14 @@
      ]
     ],
     "datachannel-emptystring.html": [
-     "6af436a1d1bd4fb0c3bb8065f48475582c87e33a",
+     "456bac7367e6f9034f83bbee6998313b789b8c0d",
      [
       null,
       {}
      ]
     ],
     "getstats.html": [
-     "979e99c0b27cc39af3f3a050df16a70b8f1221e8",
+     "0950a374c3cd8a44cbb8bffc2991fc6dc95417c8",
      [
       null,
       {}
@@ -521841,14 +522020,14 @@
      ]
     },
     "no-media-call.html": [
-     "dbe6a0dd4c210b2fe930e574fe5d638968805dca",
+     "b1eba08d0b433c60c6332199cd35294847028a0c",
      [
       null,
       {}
      ]
     ],
     "promises-call.html": [
-     "ceb6ab258ccbaaebb39b63742a48a379db35bc46",
+     "8b9a27554973531e8528406a52d38b7c55932f3c",
      [
       null,
       {}
@@ -521968,14 +522147,14 @@
      ]
     ],
     "simplecall-no-ssrcs.https.html": [
-     "87f8d939a5a2f80fa9fae137cf34d6e99ecf391a",
+     "5160451f012e642dd5697e034a19a7f8895421ea",
      [
       null,
       {}
      ]
     ],
     "simplecall.https.html": [
-     "291437a526582d13db6e04fa39c152ce9ed5859a",
+     "ffe043b6a237fae1a4f70e2cfac495a2a6132c28",
      [
       null,
       {}
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini
deleted file mode 100644
index f29da48a2a0..00000000000
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[hit-test-floats-003.html]
-  [Miss float below something else]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
new file mode 100644
index 00000000000..baa9f1a7541
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
@@ -0,0 +1,4 @@
+[hit-test-floats-005.html]
+  [Miss clipped float]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/CSS2/positioning/detach-abspos-before-layout.html.ini b/tests/wpt/metadata/css/CSS2/positioning/detach-abspos-before-layout.html.ini
new file mode 100644
index 00000000000..4cc6e839ea4
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/positioning/detach-abspos-before-layout.html.ini
@@ -0,0 +1,4 @@
+[detach-abspos-before-layout.html]
+  [No crash or DCHECK failure]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
index 4a1e8110f6f..f8e7e539aae 100644
--- a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
+++ b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
@@ -2,3 +2,6 @@
   [Hit test intersecting scaled box]
     expected: FAIL
 
+  [Hit test within unscaled box]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
deleted file mode 100644
index 4c79907309b..00000000000
--- a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[CaretPosition-001.html]
-  [Element at (400, 100)]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
new file mode 100644
index 00000000000..e181af5397f
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
@@ -0,0 +1,4 @@
+[elementsFromPoint-invalid-cases.html]
+  [The root element is the last element returned for otherwise empty queries within the viewport]
+    expected: FAIL
+
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 17cbb82d7dc..1b48648b68e 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,27 +312,24 @@
   [fetch(): separate response Content-Type: text/plain ]
     expected: NOTRUN
 
-  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
+    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 e67f0406fc3..d2df9b78483 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,3 +53,6 @@
   [combined text/javascript ]
     expected: FAIL
 
+  [separate text/javascript x/x]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/http-cache/split-cache.html.ini b/tests/wpt/metadata/fetch/http-cache/split-cache.html.ini
new file mode 100644
index 00000000000..45120a9f132
--- /dev/null
+++ b/tests/wpt/metadata/fetch/http-cache/split-cache.html.ini
@@ -0,0 +1,7 @@
+[split-cache.html]
+  [HTTP cache is not shared between same-site frames with cross-site top-level frames]
+    expected: FAIL
+
+  [HTTP cache is not shared between cross-site top-level frames]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
index 1c62485a210..58de838d890 100644
--- a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -11,9 +11,6 @@
   [X-Content-Type-Options%3A%20nosniff%2C%2C%40%23%24%23%25%25%26%5E%26%5E*()()11!]
     expected: FAIL
 
-  [X-Content-Type-Options%3A%20%2Cnosniff]
-    expected: FAIL
-
-  [Content-Type-Options%3A%20nosniff]
+  [X-Content-Type-Options%3A%20%22nosniFF%22]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
deleted file mode 100644
index 385376c7321..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_4.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html.ini b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html.ini
new file mode 100644
index 00000000000..9c1f920a597
--- /dev/null
+++ b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html.ini
@@ -0,0 +1,13 @@
+[flex-legend-float-abspos.html]
+  [dynamic changes to float]
+    expected: FAIL
+
+  [dynamic changes to position]
+    expected: FAIL
+
+  [inserting a new legend and removing it again]
+    expected: FAIL
+
+  [no dynamic changes]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
index 98163335e40..1de3f8d68b2 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/image-maps/image-map-processing-model/hash-name-reference.html.ini
@@ -172,6 +172,3 @@
   [XHTML img usemap="http://example.org/#garbage-before-hash-id"]
     expected: FAIL
 
-  [HTML (standards) IMG usemap="no-hash-name"]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 2a166bb97b7..fc37df7e3fa 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_escaping-1.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
index c6f45be1eb2..e63fe7c263e 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index 9df1ac56f2a..963d4cd20ef 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index 45d8be1c898..d43f38b40cd 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-2.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index e440b1e38c6..71edac2c5ed 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-3.html]
   type: testharness
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini
deleted file mode 100644
index b193c33c2b6..00000000000
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[form-double-submit.html]
-  [default submit action should supersede onclick submit()]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
deleted file mode 100644
index 178680e5d14..00000000000
--- a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[script-onerror-insertion-point-2.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
index 69bd952d756..910c88d3e81 100644
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/ignore-opens-during-unload.window.js.ini
@@ -1,5 +1,5 @@
 [ignore-opens-during-unload.window.html]
-  expected: TIMEOUT
+  expected: CRASH
   [ignore-opens-during-unload]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
index 0cef5158fae..01f7b72cbe7 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@@ -4,3 +4,6 @@
   [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
     expected: TIMEOUT
 
+  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
new file mode 100644
index 00000000000..064cf47545b
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
@@ -0,0 +1,5 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
deleted file mode 100644
index 663a1f8fa30..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/web-platform-tests/common/get-host-info.sub.js b/tests/wpt/web-platform-tests/common/get-host-info.sub.js
index 1c28a7f476f..8f37d557583 100644
--- a/tests/wpt/web-platform-tests/common/get-host-info.sub.js
+++ b/tests/wpt/web-platform-tests/common/get-host-info.sub.js
@@ -7,6 +7,7 @@ function get_host_info() {
   var HTTP_PORT = '{{ports[http][0]}}';
   var HTTP_PORT2 = '{{ports[http][1]}}';
   var HTTPS_PORT = '{{ports[https][0]}}';
+  var HTTPS_PORT2 = '{{ports[https][1]}}';
   var PROTOCOL = self.location.protocol;
   var IS_HTTPS = (PROTOCOL == "https:");
   var HTTP_PORT_ELIDED = HTTP_PORT == "80" ? "" : (":" + HTTP_PORT);
@@ -22,6 +23,7 @@ function get_host_info() {
     HTTP_PORT: HTTP_PORT,
     HTTP_PORT2: HTTP_PORT2,
     HTTPS_PORT: HTTPS_PORT,
+    HTTPS_PORT2: HTTPS_PORT2,
     ORIGINAL_HOST: ORIGINAL_HOST,
     REMOTE_HOST: REMOTE_HOST,
 
diff --git a/tests/wpt/web-platform-tests/css/CSS2/linebox/needs-layout-transform.html b/tests/wpt/web-platform-tests/css/CSS2/linebox/needs-layout-transform.html
new file mode 100644
index 00000000000..8a307b3b68d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/CSS2/linebox/needs-layout-transform.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<title>Reusing cached lines multiple times should not crash</title>
+<link rel="author" href="mailto:kojii@chromium.org">
+<link rel="help" href="https://crbug.com/1102083">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<a><object id="target"><b></b></object><br></a>
+<script>
+test(() => {
+  const target = document.getElementById('target');
+  target.style.setProperty('transition-delay', '9999s');
+  document.body.offsetWidth;
+  target.style.transform = 'scale(1)';
+  document.body.offsetHeight;
+}, 'No crash');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/CSS2/positioning/detach-abspos-before-layout.html b/tests/wpt/web-platform-tests/css/CSS2/positioning/detach-abspos-before-layout.html
new file mode 100644
index 00000000000..27ee59ccc50
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/CSS2/positioning/detach-abspos-before-layout.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<title>Detaching positioned object before it is laid out should not crash</title>
+<link rel="author" href="mailto:kojii@chromium.org">
+<link rel="help" href="https://crbug.com/1101986">
+<meta name="assert" content="Detaching positioned object before it is laid out should not crash">
+<style>
+.float {
+  float: left;
+}
+.abs {
+  position: absolute;
+}
+</style>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+  <div id="container">text<span id="target" class="float"></span></div>
+</body>
+<script>
+test(() => {
+  document.body.offsetTop;
+  let target = document.getElementById('target');
+
+  // Change `#target` from floating object to positioned object.
+  target.classList.add('abs');
+
+  // Style recalc without layout, and detach.
+  getComputedStyle(target).display;
+  container.style.display = "none";
+}, 'No crash or DCHECK failure');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-display/display-first-line-002-ref.html b/tests/wpt/web-platform-tests/css/css-display/display-first-line-002-ref.html
new file mode 100644
index 00000000000..e82f6153a22
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-display/display-first-line-002-ref.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<div contenteditable></div>
+<p>The word "PASS" should be seen below. There should be no DCHECK
+  failure.</p>
+<p style="color: blue;">PASS</p>
diff --git a/tests/wpt/web-platform-tests/css/css-display/display-first-line-002.html b/tests/wpt/web-platform-tests/css/css-display/display-first-line-002.html
new file mode 100644
index 00000000000..fef1d0b001c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-display/display-first-line-002.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Display flex first line with floated first letter</title>
+<link rel="help" href="https://crbug.com/1097595">
+<link rel="match" href="display-first-line-002-ref.html">
+<style id="styleElm">
+  #victim::first-line { display:flex;  }
+  #victim::first-letter { float:right; }
+</style>
+
+<!-- The contenteditable DIV is just here to trigger legacy layout
+     fallback, and a DCHECK failure identical to the one in the bug
+     report. If we remove it, we'll get NG layout, and then it will
+     actually DCHECK-fail inside NG inline layout code instead. -->
+<div contenteditable></div>
+
+<p>The word "PASS" should be seen below. There should be no DCHECK
+  failure.</p>
+<div id="child" style="display:none;"></div>
+<div id="victim" style="width:fit-content;">
+  SPAS
+</div>
+<script>
+  document.body.offsetTop;
+  styleElm.appendChild(child);
+  document.body.offsetTop;
+  victim.style.color = "blue";
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-display/display-with-float-dynamic.html b/tests/wpt/web-platform-tests/css/css-display/display-with-float-dynamic.html
new file mode 100644
index 00000000000..7cc2fefcc42
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-display/display-with-float-dynamic.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Computed float value of flex/grid items</title>
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-containers">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#grid-containers">
+<meta name="assert" content="computed float value of flex/grid items should be as specified">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div id="flex" style="display:flex;">
+  <div id="flex-item"></div>
+</div>
+<div id="grid" style="display:grid;">
+  <div id="grid-item">
+</div>
+<script>
+  function setFloatFor(id, float) {
+    document.getElementById(id).style.cssFloat = float;
+  }
+  function getFloatFor(id) {
+    return window.getComputedStyle(document.getElementById(id)).getPropertyValue("float");
+  }
+  function setDisplayBlock(id) {
+    document.getElementById(id).style.display = "block";
+  }
+  test(function() {
+    assert_equals(getFloatFor("flex-item"), "none");
+    assert_equals(getFloatFor("grid-item"), "none");
+
+    setFloatFor("flex-item", "left");
+    setFloatFor("grid-item", "right");
+    assert_equals(getFloatFor("flex-item"), "left");
+    assert_equals(getFloatFor("grid-item"), "right");
+
+    setDisplayBlock("grid");
+    setDisplayBlock("flex");
+    assert_equals(getFloatFor("flex-item"), "left");
+    assert_equals(getFloatFor("grid-item"), "right");
+  }, "computed style for float");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-display/display-with-float.html b/tests/wpt/web-platform-tests/css/css-display/display-with-float.html
new file mode 100644
index 00000000000..49f94799d93
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-display/display-with-float.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Computed float value of flex/grid items</title>
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#flex-containers">
+<link rel="help" href="https://drafts.csswg.org/css-grid-1/#grid-containers">
+<meta name="assert" content="computed float value of flex/grid items should be as specified">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div style="display:flex;">
+  <div id="flex-item" style="float:left;"></div>
+</div>
+<div style="display:grid;">
+  <div id="grid-item" style="float:right;"></div>
+</div>
+<script>
+  function getFloatFor(id) {
+    return window.getComputedStyle(document.getElementById(id)).getPropertyValue("float");
+  }
+  test(function() {
+    assert_equals(getFloatFor("flex-item"), "left");
+    assert_equals(getFloatFor("grid-item"), "right");
+  }, "computed style for float");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-baseline-004.html b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-baseline-004.html
index baabc70a3f4..7c3e46cfdbd 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-baseline-004.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/alignment/grid-baseline-004.html
@@ -35,9 +35,17 @@ body { margin: 0; }
 }
 .item {
     height: 25px;
-    border-color: black;
+    border-color: gray;
     border-style: solid;
 }
+.grid.grid > * {
+    background: silver;
+    background: rgba(0,0,0,0.3);
+}
+.target.target {
+    background: blue;
+    border-color: navy;
+}
 .style1 {
     border-width: 5px 0px 10px;
     padding: 10px 0px 20px;
@@ -79,124 +87,134 @@ body { margin: 0; }
 </p>
 
 <p>
-    This case shows 3 items located along the first row and in different columns, so grid baseline is computed using the one located at first column (blue item).
+    This case shows 3 items located along the first row and in different columns.
+    The grid baseline is computed using the one located at first column (blue item)
+    regardless of source order.
 </p>
 <div class="container" data-expected-width="480" data-expected-height="120">
     <div class="grid" data-offset-x="0" data-offset-y="20">
-        <div class="item style1 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="item style1 firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="item style2 firstRowSecondColumn" data-offset-x="50"  data-offset-y="10"></div>
         <div class="item style3 firstRowThirdColumn"  data-offset-x="100" data-offset-y="20"></div>
     </div>
     <div class="grid" data-offset-x="160" data-offset-y="10">
         <div class="item style1 firstRowThirdColumn"  data-offset-x="100" data-offset-y="0"></div>
-        <div class="item style2 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="10"></div>
+        <div class="item style2 firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="10"></div>
         <div class="item style3 firstRowSecondColumn" data-offset-x="50"  data-offset-y="20"></div>
     </div>
     <div class="grid" data-offset-x="320" data-offset-y="0">
         <div class="item style1 firstRowSecondColumn" data-offset-x="50"  data-offset-y="0"></div>
         <div class="item style2 firstRowThirdColumn"  data-offset-x="100" data-offset-y="10"></div>
-        <div class="item style3 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="20"></div>
+        <div class="item style3 firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="20"></div>
     </div>
 </div>
 
 <p>
-    This case shows 3 items located along the first row and in different columns, so such item is used to determine the grid's baseline instead of using the grid order.
+    This case shows 3 items located along the first row and in different columns.
+    The baseline-aligned item (blue) always determines the grid baseline.
 </p>
 <div class="container" data-expected-width="480" data-expected-height="120">
     <div class="grid" data-offset-x="0" data-offset-y="0">
         <div class="item style1 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="item style2 firstRowSecondColumn" data-offset-x="50"  data-offset-y="10"></div>
-        <div class="item style3 firstRowThirdColumn alignSelfBaseline"  data-offset-x="100" data-offset-y="20"></div>
+        <div class="item style3 firstRowThirdColumn alignSelfBaseline target"  data-offset-x="100" data-offset-y="20"></div>
     </div>
     <div class="grid" data-offset-x="160" data-offset-y="0">
         <div class="item style1 firstRowThirdColumn"  data-offset-x="100" data-offset-y="0"></div>
         <div class="item style2 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="10"></div>
-        <div class="item style3 firstRowSecondColumn alignSelfBaseline" data-offset-x="50"  data-offset-y="20"></div>
+        <div class="item style3 firstRowSecondColumn alignSelfBaseline target" data-offset-x="50"  data-offset-y="20"></div>
     </div>
     <div class="grid" data-offset-x="320" data-offset-y="20">
-        <div class="item style1 firstRowSecondColumn alignSelfBaseline" data-offset-x="50"  data-offset-y="0"></div>
+        <div class="item style1 firstRowSecondColumn alignSelfBaseline target" data-offset-x="50"  data-offset-y="0"></div>
         <div class="item style2 firstRowThirdColumn"  data-offset-x="100" data-offset-y="10"></div>
         <div class="item style3 firstRowFirstColumn"  data-offset-x="0"   data-offset-y="20"></div>
     </div>
 </div>
 
 <p>
-    This case shows 3 items' areas intersecting the first row and first column, so the dom order must be used to determine each grid's baseline.
+    This case shows 3 items' areas intersecting the first row and first column,
+    but none of them participate in baseline alignment in the first row,
+    so the dom order must be used to determine each grid's baseline.
 </p>
 <div class="container" data-expected-width="480" data-expected-height="165">
     <div class="grid twoRows" data-offset-x="0" data-offset-y="40">
-        <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
+        <div class="bothRowFirstColumn style2" style="align-self: last baseline"  data-offset-x="0"></div>
     </div>
     <div class="grid twoRows" data-offset-x="160" data-offset-y="0">
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
+        <div class="bothRowFirstColumn target"  data-offset-x="0" data-offset-y="10"></div>
         <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
     </div>
     <div class="grid twoRows" data-offset-x="320" data-offset-y="55">
-        <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
+        <div class="firstRowBothColumn target" data-offset-x="0"  data-offset-y="15"></div>
         <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
     </div>
 </div>
 
 <p>
-    This case shows 3 items' areas intersecting the first row and first column, but one of the items participates in baseline alignment, so such item is used to determine the grid's baseline instead of using the dom order.
+    This case shows 3 items' areas intersecting the first row and first column,
+    but one of the items participates in baseline alignment in the first row,
+    so such item is used to determine the grid's baseline
+    instead of using the dom order.
 </p>
 <div class="container" data-expected-width="480" data-expected-height="165">
     <div class="grid twoRows" data-offset-x="0" data-offset-y="55">
         <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
-        <div class="firstRowBothColumn alignSelfBaseline" style="width: 100px; height: 20px;"  data-offset-x="0"  data-offset-y="15"></div>
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
+        <div class="firstRowBothColumn alignSelfBaseline target" style="width: 100px; height: 20px;"  data-offset-x="0"  data-offset-y="15"></div>
+        <div class="bothRowFirstColumn" data-offset-x="0" data-offset-y="10"></div>
     </div>
     <div class="grid twoRows" data-offset-x="160" data-offset-y="40">
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
-        <div class="firstRowFirstColumn alignSelfBaseline" style="width: 50px; height: 50px;"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="bothRowFirstColumn style2" style="align-self: last baseline" data-offset-x="0"></div>
+        <div class="firstRowFirstColumn alignSelfBaseline target" style="width: 50px; height: 50px;"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
     </div>
     <div class="grid twoRows" data-offset-x="320" data-offset-y="0">
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
         <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
-        <div class="bothRowFirstColumn alignSelfBaseline" style="width: 40px; height: 80px;"  data-offset-x="0" data-offset-y="10"></div>
+        <div class="bothRowFirstColumn alignSelfBaseline target" style="width: 40px; height: 80px;"  data-offset-x="0" data-offset-y="10"></div>
     </div>
 </div>
 
 <p>
-    This case shows one of the grids with no items, hence its baseline must be synthesized.
+    This case shows one of the grids with no items,
+    hence its baseline must be synthesized from its margin box.
 </p>
 <div class="container" data-expected-width="480" data-expected-height="250">
     <div class="grid twoRows" data-offset-x="0" data-offset-y="140">
-        <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
+        <div class="firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
         <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
     </div>
     <div class="grid twoRows" data-offset-x="160" data-offset-y="100">
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
+        <div class="bothRowFirstColumn target"  data-offset-x="0" data-offset-y="10"></div>
         <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
     </div>
-    <div class="grid empty twoRows" data-offset-x="320" data-offset-y="15">
+    <div class="grid empty twoRows target" data-offset-x="320" data-offset-y="15">
     </div>
 </div>
 
 <p>
-    This case shows one of the grids with no items in the first row, hence its baseline must be synthesized.
+    This case shows two of the grids with no items in their first row,
+    hence the items in the second row are evaluated.
 </p>
-<div class="container" data-expected-width="480" data-expected-height="300">
-    <div class="grid twoRows" data-offset-x="0" data-offset-y="190">
-        <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
+<div class="container" data-expected-width="480" data-expected-height="250">
+    <div id=first class="grid twoRows" data-offset-x="0" data-offset-y="80">
+        <div class="firstRowFirstColumn target"  data-offset-x="0"   data-offset-y="0"></div>
         <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
         <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
     </div>
-    <div class="grid twoRows" data-offset-x="160" data-offset-y="150">
-        <div class="bothRowFirstColumn"  data-offset-x="0" data-offset-y="10"></div>
-        <div class="firstRowFirstColumn"  data-offset-x="0"   data-offset-y="0"></div>
-        <div class="firstRowBothColumn" data-offset-x="0"  data-offset-y="15"></div>
+    <div id=second class="grid threeRows" data-offset-x="160" data-offset-y="55">
+        <div class="thirdRowFirstColumn" data-offset-x="0" data-offset-y="100"></div>
+        <div class="secondRowBothColumn" data-offset-x="0" data-offset-y="65"></div>
+        <div class="secondRowSecondColumn style3 alignSelfBaseline target" id="first"  data-offset-x="0"   data-offset-y="80"></div>
     </div>
     <div class="grid empty threeRows" data-offset-x="320" data-offset-y="15">
-        <div class="secondRowFirstColumn"  data-offset-x="0" data-offset-y="60"></div>
         <div class="thirdRowSecondColumn"  data-offset-x="50"   data-offset-y="110"></div>
+        <div class="secondRowFirstColumn target"  data-offset-x="0" data-offset-y="60"></div>
         <div class="secondRowBothColumn" data-offset-x="0"  data-offset-y="75"></div>
     </div>
 </div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-columns-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-columns-001.html
index ed32ee55d5b..83ab583797d 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-columns-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-columns-001.html
@@ -23,13 +23,16 @@
 }
 
 .gridOnlyAutoRepeat { grid-template-columns: repeat(auto-fill, 30px [autobar]); }
+.gridMinMaxAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(13px, 30px)); }
+.gridMaxMinAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(30px, 13px)); }
+.gridMaxMinPercentAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(30px, 6.5%)); }
 .gridAutoRepeatAndFixedBefore { grid-template-columns: 10px [foo] 20% [bar] repeat(auto-fill, [autofoo] 35px); }
 .gridAutoRepeatAndFixedAfter { grid-template-columns: repeat(auto-fill, [first] 30px [last]) [foo] minmax(60px, 80px) [bar] minmax(45px, max-content); }
 .gridAutoRepeatAndFixed { grid-template-columns: [start] repeat(2, 50px [a]) [middle] repeat(auto-fill, [autofoo] 15px [autobar]) minmax(5%, 10%) [end]; }
 .gridMultipleNames { grid-template-columns: [start] 20px [foo] 50% repeat(auto-fill, [bar] 20px [start foo]) [foo] 10% [end bar]; }
 .gridMultipleTracks { grid-template-columns: [start] 20px repeat(auto-fill, [a] 2em [b c] 10% [d]) [e] minmax(75px, 1fr) [last]; }
 
-.item { background-color: cyan; }
+.item { background: cyan; }
 
 .gap { grid-column-gap: 20px; }
 
@@ -45,7 +48,19 @@
 <p>This test checks that repeat(auto-fill, ) syntax works as expected.</p>
 
 <div class="grid gridOnlyAutoRepeat">
-    <div class="item" style="grid-column: 1 / span 6" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMinMaxAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMaxMinAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMaxMinPercentAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
 </div>
 
 <div class="grid gridOnlyAutoRepeat">
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-rows-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-rows-001.html
index afce3f5fa91..d3078b7b3ad 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-rows-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fill-rows-001.html
@@ -28,18 +28,20 @@
 }
 
 .gridOnlyAutoRepeat { grid-template-rows: repeat(auto-fill, 30px [autobar]); }
+.gridMinMaxAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(13px, 30px)); }
+.gridMaxMinAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(30px, 13px)); }
+.gridMaxMinPercentAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(30px, 6.5%)); }
 .gridAutoRepeatAndFixedBefore { grid-template-rows: 10px [foo] 20% [bar] repeat(auto-fill, [autofoo] 35px); }
 .gridAutoRepeatAndFixedAfter { grid-template-rows: repeat(auto-fill, [first] 30px [last]) [foo] minmax(60px, 80px) [bar] minmax(45px, max-content); }
 .gridAutoRepeatAndFixed { grid-template-rows: [start] repeat(2, 50px [a]) [middle] repeat(auto-fill, [autofoo] 15px [autobar]) minmax(5%, 10%) [end]; }
 .gridMultipleNames { grid-template-rows: [start] 20px [foo] 50% repeat(auto-fill, [bar] 20px [start foo]) [foo] 10% [end bar]; }
 .gridMultipleTracks { grid-template-rows: [start] 20px repeat(auto-fill, [a] 2em [b c] 10% [d]) [e] minmax(75px, 1fr) [last]; }
 
-.item { background-color: blue; }
+.item { background: blue; }
 .item:nth-child(2) { background: green; }
 .item:nth-child(3) { background: orange; }
 
 .gap { grid-row-gap: 20px; }
-
 </style>
 
 <script src="/resources/testharness.js"></script>
@@ -52,7 +54,19 @@
 <p>This test checks that repeat(auto-fill, ) syntax works as expected.</p>
 
 <div class="grid gridOnlyAutoRepeat">
-    <div class="item" style="grid-row: 1 / span 6" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
+<div class="grid gridMinMaxAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
+<div class="grid gridMaxMinAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
+<div class="grid gridMaxMinPercentAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
 </div>
 
 <div class="grid gridOnlyAutoRepeat">
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-columns-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-columns-001.html
index b1dab7e32f9..524bb209a56 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-columns-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-columns-001.html
@@ -1,5 +1,7 @@
 <!DOCTYPE html>
 <title>CSS Grid: auto-fit columns</title>
+<base href="https://wpt.live/css/css-grid/grid-definition/grid-auto-fill-rows-001.html">
+
 <link rel="author" title="Sergio Villar" href="mailto: svillar@igalia.com">
 <link rel="help" href="https://drafts.csswg.org/css-grid-1/#valdef-repeat-auto-fit">
 <link rel="help" href="https://drafts.csswg.org/css-grid-1/#propdef-grid-auto-columns">
@@ -24,6 +26,9 @@
 }
 
 .gridOnlyAutoRepeat { grid-template-columns: repeat(auto-fit, 30px [autobar]); }
+.gridMinMaxAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(13px, 30px)); }
+.gridMaxMinAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(30px, 13px)); }
+.gridMaxMinPercentAutoRepeat { grid-template-columns: repeat(auto-fill, minmax(30px, 6.5%)); }
 .gridAutoRepeatAndFixedBefore { grid-template-columns: 10px [foo] 20% [bar] repeat(auto-fit, [autofoo] 35px); }
 .gridAutoRepeatAndFixedAfter { grid-template-columns: repeat(auto-fit, [first] 30px [last]) [foo] minmax(60px, 80px) [bar] minmax(45px, max-content); }
 .gridAutoRepeatAndFixed { grid-template-columns: [start] repeat(2, 50px [a]) [middle] repeat(auto-fit, [autofoo] 15px [autobar]) minmax(5%, 10%) [end]; }
@@ -31,8 +36,8 @@
 .gridMultipleTracks { grid-template-columns: [start] 20px repeat(auto-fit, [a] 2em [b c] 10% [d]) [e] minmax(75px, 1fr) [last]; }
 .gridMinMaxFixedFlex { grid-template-columns: repeat(auto-fit, minmax(50px, 1fr)); }
 
-.item { background-color: cyan; }
-.item:nth-child(2n) { background-color: green; }
+.item { background: cyan; }
+.item:nth-child(2n) { background: green; }
 
 .gap { grid-column-gap: 20px; }
 
@@ -48,7 +53,19 @@
 <p>This test checks that repeat(auto-fit, ) syntax works as expected.</p>
 
 <div class="grid gridOnlyAutoRepeat">
-    <div class="item" style="grid-column: 1 / span 6" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMinMaxAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMaxMinAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
+</div>
+
+<div class="grid gridMaxMinPercentAutoRepeat">
+    <div class="item" style="grid-column: 1 / -1" data-offset-x="0" data-offset-y="0" data-expected-width="180" data-expected-height="25"></div>
 </div>
 
 <div class="grid gridOnlyAutoRepeat">
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-rows-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-rows-001.html
index 7619d9e023e..fef304b2188 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-rows-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-auto-fit-rows-001.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <title>CSS Grid: auto-fit rows</title>
-<link rel="author" title="Sergio Villar" href="mailto: svillar@igalia.com">
+h<link rel="author" title="Sergio Villar" href="mailto: svillar@igalia.com">
 <link rel="help" href="https://drafts.csswg.org/css-grid-1/#valdef-repeat-auto-fit">
 <link rel="help" href="https://drafts.csswg.org/css-grid-1/#propdef-grid-auto-columns">
 <link rel="help" href="https://drafts.csswg.org/css-grid-1/#propdef-grid-auto-rows">
@@ -27,14 +27,17 @@
 }
 
 .gridOnlyAutoRepeat { grid-template-rows: repeat(auto-fit, 30px [autobar]); }
+.gridMinMaxAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(13px, 30px)); }
+.gridMaxMinAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(30px, 13px)); }
+.gridMaxMinPercentAutoRepeat { grid-template-rows: repeat(auto-fill, minmax(30px, 6.5%)); }
 .gridAutoRepeatAndFixedBefore { grid-template-rows: 10px [foo] 20% [bar] repeat(auto-fit, [autofoo] 35px); }
 .gridAutoRepeatAndFixedAfter { grid-template-rows: repeat(auto-fit, [first] 30px [last]) [foo] minmax(60px, 80px) [bar] minmax(45px, max-content); }
 .gridAutoRepeatAndFixed { grid-template-rows: [start] repeat(2, 50px [a]) [middle] repeat(auto-fit, [autofoo] 15px [autobar]) minmax(5%, 10%) [end]; }
 .gridMultipleNames { grid-template-rows: [start] 20px [foo] 50% repeat(auto-fit, [bar] 20px [start foo]) [foo] 10% [end bar]; }
 .gridMultipleTracks { grid-template-rows: [start] 20px repeat(auto-fit, [a] 2em [b c] 10% [d]) [e] minmax(75px, 1fr) [last]; }
 
-.item { background-color: cyan; }
-.item:nth-child(2n) { background-color: green; }
+.item { background: cyan; }
+.item:nth-child(2n) { background: green; }
 
 .gap { grid-row-gap: 20px; }
 
@@ -53,6 +56,18 @@
     <div class="item" style="grid-row: 1 / span 6" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
 </div>
 
+<div class="grid gridMinMaxAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
+<div class="grid gridMaxMinAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
+<div class="grid gridMaxMinPercentAutoRepeat">
+    <div class="item" style="grid-row: 1 / -1" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
+</div>
+
 <div class="grid gridOnlyAutoRepeat">
     <div class="item" style="grid-row: 1 / span 6 autobar" data-offset-y="0" data-offset-x="0" data-expected-height="180" data-expected-width="25"></div>
 </div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html
index da29040b31b..ed4c500a198 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html
@@ -25,29 +25,29 @@
   TestingUtils.testGridTemplateAreas('grid', '"lower UPPER 10 -minus _low 1-st ©copy_right line¶"', '"lower UPPER 10 -minus _low 1-st ©copy_right line¶"');
   TestingUtils.testGridTemplateAreas('grid', '"a b"', '"a b"');
   TestingUtils.testGridTemplateAreas('grid', '"a b" "c d"', '"a b" "c d"');
-  TestingUtils.testGridTemplateAreas('grid', '"a   b"   "c   d"', ['"a b" "c d"', '"a   b" "c   d"']);
+  TestingUtils.testGridTemplateAreas('grid', '"a   b"   "c   d"', '"a b" "c d"');
   TestingUtils.testGridTemplateAreas('grid', '"a b""c d"', '"a b" "c d"');
   TestingUtils.testGridTemplateAreas('grid', '"a b"\t"c d"', '"a b" "c d"');
   TestingUtils.testGridTemplateAreas('grid', '"a b"\n"c d"', '"a b" "c d"');
   TestingUtils.testGridTemplateAreas('grid', '"a b" "a b"', '"a b" "a b"');
   TestingUtils.testGridTemplateAreas('grid', '"a a" "b b"', '"a a" "b b"');
   TestingUtils.testGridTemplateAreas('grid', '". a ." "b a c"', '". a ." "b a c"');
-  TestingUtils.testGridTemplateAreas('grid', '".. a ..." "b a c"', ['". a ." "b a c"', '".. a ..." "b a c"']);
-  TestingUtils.testGridTemplateAreas('grid', '".a..." "b a c"', ['". a ." "b a c"', '".a..." "b a c"']);
+  TestingUtils.testGridTemplateAreas('grid', '".. a ..." "b a c"', '". a ." "b a c"');
+  TestingUtils.testGridTemplateAreas('grid', '".a..." "b a c"', '". a ." "b a c"');
   TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot ."', '"head head" "nav main" "foot ."');
-  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot ...."', ['"head head" "nav main" "foot ."', '"head head" "nav main" "foot ...."']);
-  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot."', ['"head head" "nav main" "foot ."', '"head head" "nav main" "foot."']);
+  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot ...."', '"head head" "nav main" "foot ."');
+  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot."', '"head head" "nav main" "foot ."');
   TestingUtils.testGridTemplateAreas('grid', '". header header ." "nav main main main" "nav footer footer ."', '". header header ." "nav main main main" "nav footer footer ."');
-  TestingUtils.testGridTemplateAreas('grid', '"... header header ...." "nav main main main" "nav footer footer ...."', ['". header header ." "nav main main main" "nav footer footer ."', '"... header header ...." "nav main main main" "nav footer footer ...."']);
-  TestingUtils.testGridTemplateAreas('grid', '"...header header...." "nav main main main" "nav footer footer...."', ['". header header ." "nav main main main" "nav footer footer ."', '"...header header...." "nav main main main" "nav footer footer...."']);
+  TestingUtils.testGridTemplateAreas('grid', '"... header header ...." "nav main main main" "nav footer footer ...."', '". header header ." "nav main main main" "nav footer footer ."');
+  TestingUtils.testGridTemplateAreas('grid', '"...header header...." "nav main main main" "nav footer footer...."', '". header header ." "nav main main main" "nav footer footer ."');
   TestingUtils.testGridTemplateAreas('grid', '"title stats" "score stats" "board board" "ctrls ctrls"', '"title stats" "score stats" "board board" "ctrls ctrls"');
   TestingUtils.testGridTemplateAreas('grid', '"title board" "stats board" "score ctrls"', '"title board" "stats board" "score ctrls"');
   TestingUtils.testGridTemplateAreas('grid', '". a" "b a" ". a"', '". a" "b a" ". a"');
-  TestingUtils.testGridTemplateAreas('grid', '".. a" "b a" "... a"', ['". a" "b a" ". a"', '".. a" "b a" "... a"']);
-  TestingUtils.testGridTemplateAreas('grid', '"..a" "b a" ".a"', ['". a" "b a" ". a"', '"..a" "b a" ".a"']);
+  TestingUtils.testGridTemplateAreas('grid', '".. a" "b a" "... a"', '". a" "b a" ". a"');
+  TestingUtils.testGridTemplateAreas('grid', '"..a" "b a" ".a"', '". a" "b a" ". a"');
   TestingUtils.testGridTemplateAreas('grid', '"a a a" "b b b"', '"a a a" "b b b"');
   TestingUtils.testGridTemplateAreas('grid', '". ." "a a"', '". ." "a a"');
-  TestingUtils.testGridTemplateAreas('grid', '"... ...." "a a"', ['". ." "a a"', '"... ...." "a a"']);
+  TestingUtils.testGridTemplateAreas('grid', '"... ...." "a a"', '". ." "a a"');
 
   // Reset values.
   document.getElementById('grid').style.gridTemplateAreas = '';
diff --git a/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/flex-and-intrinsic-sizes-001.html b/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/flex-and-intrinsic-sizes-001.html
index 5144450dd8c..02e34071ec4 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/flex-and-intrinsic-sizes-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/flex-and-intrinsic-sizes-001.html
@@ -44,6 +44,12 @@ div { font: 10px/1 Ahem; }
   </div>
 </div>
 
+<div class="container">
+  <div class="grid min-content" data-expected-width="30" data-expected-height="20" style="grid-template-columns:minmax(0, 1fr);">
+    <div>XXX XXX</div>
+  </div>
+</div>
+
 <div class="container">
   <div class="grid max-content" data-expected-width="70" data-expected-height="10">
     <div>XXX XXX</div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/grid-flex-track-intrinsic-sizes-003.html b/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/grid-flex-track-intrinsic-sizes-003.html
new file mode 100644
index 00000000000..81a5d141310
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/layout-algorithm/grid-flex-track-intrinsic-sizes-003.html
@@ -0,0 +1,86 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Intrinsic contribution of an item with flex tracks</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="author" title="Tab Atkins-Bittner" href="mailto:jackalmage@gmail.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#algo-spanning-items" title="11.5.3 Increase sizes to accommodate spanning items crossing content-sized tracks">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#algo-spanning-flex-items" title="11.5.4 Increase sizes to accommodate spanning items crossing flexible tracks">
+<meta name="assert" content="This test checks that the intrinsic contribution of a single grid item is distributed correctly among the tracks it spans when flexible tracks are involved, and the item's size is determined by its children rather than explicitly.">
+<style>
+#grid {
+  display: grid;
+  width: 50px;
+  height: 50px;
+  border: solid;
+}
+#item {
+  background: blue;
+}
+#item::before {
+  content: "";
+  display: block;
+  width: 100px;
+  height: 100px;
+}
+</style>
+
+<div id="log"></div>
+
+<div id="grid">
+  <div id="item"></div>
+</div>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../grid-definition/support/testing-utils.js"></script>
+<script>
+const item = document.getElementById("item");
+function checkTrackSizes(span, trackList, expected) {
+  item.style.gridColumn = item.style.gridRow = `span ${span}`;
+  TestingUtils.testGridTemplateColumnsRows("grid", trackList, trackList, expected, expected);
+}
+
+// Item spanning an intrinsic flexible track
+checkTrackSizes(1, "0fr", "100px");
+checkTrackSizes(1, "1fr", "100px");
+checkTrackSizes(1, "2fr", "100px");
+
+// Item spanning a fixed flexible track
+checkTrackSizes(1, "minmax(0, 0fr)", "0px");
+checkTrackSizes(1, "minmax(0, .5fr)", "25px");
+checkTrackSizes(1, "minmax(0, 1fr)", "50px");
+checkTrackSizes(1, "minmax(0, 2fr)", "50px");
+checkTrackSizes(1, "minmax(75px, 1fr)", "75px");
+
+// Item spanning 2 intrinsic flexible tracks
+checkTrackSizes(2, "0fr 0fr", "50px 50px");
+checkTrackSizes(2, "0fr 1fr", "0px 100px");
+checkTrackSizes(2, "1fr 0fr", "100px 0px");
+checkTrackSizes(2, "1fr 1fr", "50px 50px");
+checkTrackSizes(2, "1fr 3fr", "25px 75px");
+checkTrackSizes(2, "0fr 0fr 1fr", "50px 50px 0px");
+
+// Item spanning 2 fixed flexible tracks
+checkTrackSizes(2, "minmax(0, 0fr) minmax(0, 0fr)", "0px 0px");
+checkTrackSizes(2, "minmax(0, 0fr) minmax(0, 1fr)", "0px 50px");
+checkTrackSizes(2, "minmax(15px, 0fr) minmax(0, 1fr)", "15px 35px");
+checkTrackSizes(2, "minmax(20px, 1fr) minmax(0, 1fr)", "25px 25px");
+checkTrackSizes(2, "minmax(30px, 1fr) minmax(0, 1fr)", "30px 20px");
+
+// Item spanning an intrinsic flexible track and a fixed flexible track
+checkTrackSizes(2, "0fr minmax(0, 0fr)", "100px 0px");
+checkTrackSizes(2, "0fr minmax(0, 1fr)", "100px 0px");
+checkTrackSizes(2, "1fr minmax(0, 1fr)", "100px 0px");
+checkTrackSizes(2, "1fr minmax(25px, 1fr)", "75px 25px");
+
+// Item spanning an intrinsic flexible track and an intrinsic non-flexible track
+checkTrackSizes(2, "0fr auto", "100px 0px");
+checkTrackSizes(2, "1fr auto", "100px 0px");
+checkTrackSizes(2, "1fr max-content", "100px 0px");
+
+// Item spanning a fixed flexible track and an intrinsic non-flexible track
+checkTrackSizes(2, "minmax(0, 0fr) auto", "0px 100px");
+checkTrackSizes(2, "minmax(0, 1fr) auto", "0px 100px");
+checkTrackSizes(2, "minmax(25px, 0fr) auto", "25px 75px");
+checkTrackSizes(2, "minmax(25px, 1fr) auto", "25px 75px");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element-will-change.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element-will-change.html
new file mode 100644
index 00000000000..977eaca1405
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element-will-change.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<style>
+html {
+  background: red;
+  /* an "L" shape */
+  clip-path: polygon(50px 50px, 100px 50px, 100px 100px, 150px 100px, 150px 150px, 50px 150px);
+  will-change: transform;
+}
+div {
+  width: 500px;
+  height: 500px;
+  background: green;
+}
+</style>
+<link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
+<link rel="help" href="https://drafts.fxtf.org/compositing/#rootgroup">
+<link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop">
+<link rel="match" href="reference/clip-path-document-element-ref.html">
+<meta name="assert" content="Clip-path on the document element applies to the root background.
+    The test passes if there is a green 'L' shape without red.">
+<div></div>
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element.html
new file mode 100644
index 00000000000..56f2d5c8ebb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-document-element.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<style>
+html {
+  background: red;
+  /* an "L" shape */
+  clip-path: polygon(50px 50px, 100px 50px, 100px 100px, 150px 100px, 150px 150px, 50px 150px);
+}
+div {
+  width: 500px;
+  height: 500px;
+  background: green;
+}
+</style>
+<link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
+<link rel="help" href="https://drafts.fxtf.org/compositing/#rootgroup">
+<link rel="help" href="https://drafts.fxtf.org/compositing/#pagebackdrop">
+<link rel="match" href="reference/clip-path-document-element-ref.html">
+<meta name="assert" content="Clip-path on the document element applies to the root background.
+    The test passes if there is a green 'L' shape without red.">
+<div></div>
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/reference/clip-path-document-element-ref.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/reference/clip-path-document-element-ref.html
new file mode 100644
index 00000000000..4608e54b208
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/reference/clip-path-document-element-ref.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<style>
+div {
+  position: absolute;
+  width: 50px;
+  height: 50px;
+  background: green;
+}
+</style>
+<div style="top: 50px; left: 50px"></div>
+<div style="top: 100px; left: 50px"></div>
+<div style="top: 100px; left: 100px"></div>
diff --git a/tests/wpt/web-platform-tests/css/css-ui/cursor-auto-007.html b/tests/wpt/web-platform-tests/css/css-ui/cursor-auto-007.html
index 6cf1495a02c..0d355ad0d95 100644
--- a/tests/wpt/web-platform-tests/css/css-ui/cursor-auto-007.html
+++ b/tests/wpt/web-platform-tests/css/css-ui/cursor-auto-007.html
@@ -36,7 +36,7 @@
   .unselectable {
     display: block;
     user-select: none;
-    -webkit-user-select: none; /* Yes, vendor prefixes are ugly. But this one was grandfathered in and support is required by spec. */
+    -webkit-user-select: none;
   }
 }
 
diff --git a/tests/wpt/web-platform-tests/css/css-values/rem-unit-root-element.html b/tests/wpt/web-platform-tests/css/css-values/rem-unit-root-element.html
new file mode 100644
index 00000000000..cfd7af17c4f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-values/rem-unit-root-element.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<title>CSS Values and Units Test: rem units on the root element</title>
+<link rel="help" href="https://drafts.csswg.org/css-values/#rem">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  :root {
+    font-size: 50px;
+    margin-left: 2rem;
+    padding-top: 2rem;
+    line-height: 2rem;
+  }
+</style>
+<script>
+  let rootStyle = getComputedStyle(document.documentElement);
+  test(() => assert_equals(rootStyle.marginLeft, "100px"), "rem based margin.");
+  test(() => assert_equals(rootStyle.paddingTop, "100px"), "rem based padding.");
+  test(() => assert_equals(rootStyle.lineHeight, "100px"), "rem based line-height.");
+
+  test(() => {
+    document.documentElement.style.fontSize = "initial";
+    let initialFontSize = parseInt(getComputedStyle(document.documentElement).fontSize);
+    document.documentElement.style.fontSize = "3rem";
+    assert_equals(getComputedStyle(document.documentElement).fontSize, 3*initialFontSize + "px");
+  }, "Check that rem font-size is based on the initial font-size.");
+</script>
diff --git a/tests/wpt/web-platform-tests/custom-state-pseudo-class/idlharness.window.js b/tests/wpt/web-platform-tests/custom-state-pseudo-class/idlharness.window.js
new file mode 100644
index 00000000000..7ddbe315a60
--- /dev/null
+++ b/tests/wpt/web-platform-tests/custom-state-pseudo-class/idlharness.window.js
@@ -0,0 +1,14 @@
+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+
+'use strict';
+
+idl_test(
+  ['custom-state-pseudo-class'],
+  ['html'],
+  idl_array => {
+    idl_array.add_objects({
+      // Nothing to add; spec only defined a partial interface.
+    });
+  }
+);
diff --git a/tests/wpt/web-platform-tests/deprecation-reporting/idlharness.any.js b/tests/wpt/web-platform-tests/deprecation-reporting/idlharness.any.js
new file mode 100644
index 00000000000..720bacfa3ff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/deprecation-reporting/idlharness.any.js
@@ -0,0 +1,14 @@
+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+
+'use strict';
+
+idl_test(
+  ['deprecation-reporting'],
+  ['reporting'],
+  idl_array => {
+    idl_array.add_objects({
+      // TODO: objects
+    });
+  }
+);
diff --git a/tests/wpt/web-platform-tests/editing/data/README.md b/tests/wpt/web-platform-tests/editing/data/README.md
index 606c67182ca..2ac414b2802 100644
--- a/tests/wpt/web-platform-tests/editing/data/README.md
+++ b/tests/wpt/web-platform-tests/editing/data/README.md
@@ -85,6 +85,13 @@ matches the expected HTML provided here.  As on line 1, the characters []{}
 expected to be in the HTML.  However, on this line they don't affect the test's
 processing -- there are no tests of what the final selection is.
 
+This can be array of string if there are some acceptable cases.  However,
+array shouldn't be used as far as possible because WPT checks compatibility
+between browsers.  So, this should be used when:
+
+- There are some different behaviors in edge cases.
+- There are some differences which are not related to the test.
+
 ## Line 4: expected return values ##
 
        ["foo[bar]baz",
diff --git a/tests/wpt/web-platform-tests/editing/data/delete.js b/tests/wpt/web-platform-tests/editing/data/delete.js
index db53a3643f6..00b61178c74 100644
--- a/tests/wpt/web-platform-tests/editing/data/delete.js
+++ b/tests/wpt/web-platform-tests/editing/data/delete.js
@@ -2494,5 +2494,65 @@ var browserTests = [
     [["delete",""]],
     "<div>foobar</div>",
     [true],
-    {"delete":[false,false,"",false,false,""]}]
+    {"delete":[false,false,"",false,false,""]}],
+["<div> a[]bc</div>",
+    [["delete",""]],
+    "<div>bc</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>  a[]bc</div>",
+    [["delete",""]],
+    "<div>bc</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div> []abc</div>",
+    [["delete",""]],
+    "<div> abc</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div> [] abc</div>",
+    [["delete",""]],
+    "<div>  abc</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc</div><div> []def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc</div><div> [] def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc</div><div>  []def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc </div><div>[]def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc  </div><div>[]def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc </div><div> []def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc  </div><div> [] def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
+["<div>abc  </div> <div>  []def</div>",
+    [["delete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"delete":[false,false,"",false,false,""]}],
 ]
diff --git a/tests/wpt/web-platform-tests/editing/data/forwarddelete.js b/tests/wpt/web-platform-tests/editing/data/forwarddelete.js
index 2b8829e6721..b636a95e8a0 100644
--- a/tests/wpt/web-platform-tests/editing/data/forwarddelete.js
+++ b/tests/wpt/web-platform-tests/editing/data/forwarddelete.js
@@ -2379,5 +2379,65 @@ var browserTests = [
     [["forwarddelete",""]],
     "<div>foobar</div>",
     [true],
-    {"forwarddelete":[false,false,"",false,false,""]}]
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>ab[]c </div>",
+    [["forwarddelete",""]],
+    "<div>ab</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>ab[]c  </div>",
+    [["forwarddelete",""]],
+    "<div>ab</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[] </div>",
+    [["forwarddelete",""]],
+    "<div>abc </div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc [] </div>",
+    [["forwarddelete",""]],
+    "<div>abc  </div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[] </div><div>def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[]  </div><div>def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc [] </div><div>def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[]</div><div> def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[]</div><div>  def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[] </div><div> def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc [] </div><div>  def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
+["<div>abc[]  </div> <div>  def</div>",
+    [["forwarddelete",""]],
+    "<div>abcdef</div>",
+    [true],
+    {"forwarddelete":[false,false,"",false,false,""]}],
 ]
diff --git a/tests/wpt/web-platform-tests/editing/data/insertlinebreak.js b/tests/wpt/web-platform-tests/editing/data/insertlinebreak.js
index 540b1b1e411..a29862ffd36 100644
--- a/tests/wpt/web-platform-tests/editing/data/insertlinebreak.js
+++ b/tests/wpt/web-platform-tests/editing/data/insertlinebreak.js
@@ -834,5 +834,40 @@ var browserTests = [
     [["insertlinebreak",""]],
     "<div class=\"a\" id=\"x\"><p class=\"b\" id=\"y\">foo<br>{}bar</p></div>",
     [true],
-    {"insertlinebreak":[false,false,"",false,false,""]}]
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div>abc [] </div>",
+    [["insertlinebreak",""]],
+    "<div>abc<br><br></div>",
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div>abc[]  </div>",
+    [["insertlinebreak",""]],
+    "<div>abc<br><br></div>",
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div>[] abc</div>",
+    [["insertlinebreak",""]],
+    ["<div><br>abc</div>",
+     "<div><br> abc</div>"],
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div>[]  abc</div>",
+    [["insertlinebreak",""]],
+    ["<div><br>abc</div>",
+     "<div><br>  abc</div>"],
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div> [] abc</div>",
+    [["insertlinebreak",""]],
+    ["<div><br>abc</div>",
+     "<div><br> abc</div>",
+     "<div><br>  abc</div>"],
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
+["<div>  []abc</div>",
+    [["insertlinebreak",""]],
+    ["<div><br>abc</div>",
+     "<div><br>  abc</div>"],
+    [true,true],
+    {"insertlinebreak":[false,false,"",false,false,""]}],
 ]
diff --git a/tests/wpt/web-platform-tests/editing/data/insertparagraph.js b/tests/wpt/web-platform-tests/editing/data/insertparagraph.js
index fcf9e855e1c..2ffab8fd353 100644
--- a/tests/wpt/web-platform-tests/editing/data/insertparagraph.js
+++ b/tests/wpt/web-platform-tests/editing/data/insertparagraph.js
@@ -1886,4 +1886,48 @@ var browserTests = [
     "<div contenteditable=\"false\"><foo-bar contenteditable=\"\"><div>foo</div><div>bar</div></foo-bar></div>",
     [true,true],
     {"defaultparagraphseparator":[false,false,"div",false,false,"p"],"insertparagraph":[false,false,"",false,false,""]}],
+["<div>abc[] </div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>abc</div><div><br></div>",
+     "<div>abc </div><div><br></div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>abc[]  </div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>abc</div><div><br></div>",
+     "<div>abc  </div><div><br></div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>abc [] </div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div>abc</div><div><br></div>",
+     "<div>abc </div><div><br></div>",
+     "<div>abc  </div><div><br></div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>[] abc</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div><br></div><div>abc</div>",
+     "<div><br></div><div> abc</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>[]  abc</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div><br></div><div>abc</div>",
+     "<div><br></div><div>  abc</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div> [] abc</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div><br></div><div>abc</div>",
+     "<div><br></div><div> abc</div>",
+     "<div><br></div><div>  abc</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
+["<div>  []abc</div>",
+    [["defaultparagraphseparator","div"],["insertparagraph",""]],
+    ["<div><br></div><div>abc</div>",
+     "<div><br></div><div>  abc</div>"],
+    [true,true],
+    {"insertparagraph":[false,false,"",false,false,""]}],
 ]
diff --git a/tests/wpt/web-platform-tests/editing/data/inserttext.js b/tests/wpt/web-platform-tests/editing/data/inserttext.js
index 4012510fcb6..102da09211b 100644
--- a/tests/wpt/web-platform-tests/editing/data/inserttext.js
+++ b/tests/wpt/web-platform-tests/editing/data/inserttext.js
@@ -1189,5 +1189,60 @@ var browserTests = [
     [["inserttext","a"]],
     "<blockquote><font color=\"blue\">a[]</font></blockquote>",
     [true],
-    {"inserttext":[false,false,"",false,false,""]}]
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>[] abc</div>",
+    [["inserttext"," "]],
+    "<div>&nbsp;abc</div>",
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div> []abc</div>",
+    [["inserttext"," "]],
+    "<div>&nbsp;abc</div>",
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>[]  abc</div>",
+    [["inserttext"," "]],
+    "<div>&nbsp;abc</div>",
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div> [] abc</div>",
+    [["inserttext"," "]],
+    "<div>&nbsp;abc</div>",
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>  []abc</div>",
+    [["inserttext"," "]],
+    "<div>&nbsp;abc</div>",
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>abc[] </div>",
+    [["inserttext"," "]],
+    ["<div>abc&nbsp;</div>",
+     "<div>abc <br></div>"],
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>abc []</div>",
+    [["inserttext"," "]],
+    ["<div>abc&nbsp;</div>",
+     "<div>abc <br></div>"],
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>abc[]  </div>",
+    [["inserttext"," "]],
+    ["<div>abc&nbsp;</div>",
+     "<div>abc <br></div>"],
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>abc [] </div>",
+    [["inserttext"," "]],
+    ["<div>abc&nbsp;</div>",
+     "<div>abc <br></div>"],
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
+["<div>abc  []</div>",
+    [["inserttext"," "]],
+    ["<div>abc&nbsp;</div>",
+     "<div>abc <br></div>"],
+    [true],
+    {"inserttext":[false,false,"",false,false,""]}],
 ]
diff --git a/tests/wpt/web-platform-tests/editing/include/tests.js b/tests/wpt/web-platform-tests/editing/include/tests.js
index a03a68ed8dc..c18aef136b9 100644
--- a/tests/wpt/web-platform-tests/editing/include/tests.js
+++ b/tests/wpt/web-platform-tests/editing/include/tests.js
@@ -5667,9 +5667,19 @@ function runConformanceTest(browserTest) {
     subsetTest(test, function() {
         assert_equals(exception, null, "Setup must not throw an exception");
 
-        assert_equals(testDiv.innerHTML,
-            browserTest[2].replace(/[\[\]{}]/g, ""),
-            "Unexpected innerHTML (after normalizing inline style)");
+        if (Array.isArray(browserTest[2])) {
+          var expectedInnerHTMLArray = [];
+          browserTest[2].forEach(function (expectedInnerHTML) {
+            expectedInnerHTMLArray.push(expectedInnerHTML.replace(/[\[\]{}]/g, ""));
+          });
+          assert_in_array(testDiv.innerHTML,
+               expectedInnerHTMLArray,
+               "Unexpected innerHTML (after normalizing inline style)");
+        } else {
+          assert_equals(testDiv.innerHTML,
+              browserTest[2].replace(/[\[\]{}]/g, ""),
+              "Unexpected innerHTML (after normalizing inline style)");
+        }
     }, testName + " compare innerHTML");
 
     for (var command in expectedQueryResults) {
diff --git a/tests/wpt/web-platform-tests/fetch/http-cache/split-cache.tentative.html b/tests/wpt/web-platform-tests/fetch/http-cache/split-cache.html
similarity index 100%
rename from tests/wpt/web-platform-tests/fetch/http-cache/split-cache.tentative.html
rename to tests/wpt/web-platform-tests/fetch/http-cache/split-cache.html
diff --git a/tests/wpt/web-platform-tests/fetch/redirect-navigate/preserve-fragment.html b/tests/wpt/web-platform-tests/fetch/redirect-navigate/preserve-fragment.html
index 72ed24c837f..682539a7445 100644
--- a/tests/wpt/web-platform-tests/fetch/redirect-navigate/preserve-fragment.html
+++ b/tests/wpt/web-platform-tests/fetch/redirect-navigate/preserve-fragment.html
@@ -3,6 +3,11 @@
   <head>
     <meta charset="UTF-8">
     <title>Ensure fragment is kept across redirects</title>
+    <meta name="timeout" content="long">
+    <link rel=help href="https://www.w3.org/TR/cuap/#uri">
+    <link rel=help href="https://tools.ietf.org/html/rfc7231#section-7.1.2">
+    <link rel=help href="https://bugs.webkit.org/show_bug.cgi?id=158420">
+    <link rel=help href="https://bugs.webkit.org/show_bug.cgi?id=24175">
     <script src="/common/get-host-info.sub.js"></script>
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html
new file mode 100644
index 00000000000..f6eead471cc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/flex-legend-float-abspos.html
@@ -0,0 +1,97 @@
+<!doctype html>
+<title>
+  legend and float and position: absolute/fixed when the display type of
+  the fieldset is flex.
+</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<style>
+ body { margin: 0; }
+ fieldset {
+   border: 10px solid;
+   display: flex;
+   margin: 0;
+   padding: 20px;
+   width: 300px;
+ }
+ legend { height: 10px; }
+ #legend1 { float: left; }
+ #legend2 { float: right; }
+ #legend3 { position: absolute; }
+ #legend4 { position: fixed; }
+</style>
+<fieldset id=fieldset>
+  <div>div</div>
+  <legend id=legend1>legend1</legend>
+  <legend id=legend2>legend2</legend>
+  <legend id=legend3>legend3</legend>
+  <legend id=legend4>legend4</legend>
+  <legend id=legend5>legend5</legend>
+</fieldset>
+<script>
+ const fieldset = document.getElementById('fieldset');
+ const legends = document.getElementsByTagName('legend');
+ const [legend1, legend2, legend3, legend4, legend5] = legends;
+ const expectedTop = 0;
+ const expectedLeft = 10 + 20;
+
+ function assert_rendered_legend(legend) {
+   assert_equals(legend.offsetTop, expectedTop, `${legend.id}.offsetTop`);
+   assert_equals(legend.offsetLeft, expectedLeft, `${legend.id}.offsetLeft`);
+   for (const other of legends) {
+     if (other === legend) {
+       continue;
+     }
+     if (other.offsetTop === expectedTop && other.offsetLeft === expectedLeft) {
+       assert_unreached(`${other.id} should not be the "rendered legend"`);
+     }
+   }
+ }
+
+ test(t => {
+   assert_rendered_legend(legend5);
+ }, 'no dynamic changes');
+
+ test(t => {
+   const legend = document.createElement('legend');
+   t.add_cleanup(() => {
+     legend.remove();
+   });
+   legend.id = 'script-inserted';
+   legend.textContent = 'script-inserted legend';
+   fieldset.insertBefore(legend, legend1);
+   assert_rendered_legend(legend);
+   legend.remove();
+   assert_rendered_legend(legend5);
+ }, 'inserting a new legend and removing it again');
+
+ test(t => {
+   t.add_cleanup(() => {
+     legend1.id = 'legend1';
+     legend2.id = 'legend2';
+   });
+   legend2.id = '';
+   assert_rendered_legend(legend2);
+   legend1.id = '';
+   assert_rendered_legend(legend1);
+   legend1.id = 'legend1';
+   assert_rendered_legend(legend2);
+   legend2.id = 'legend2';
+   assert_rendered_legend(legend5);
+ }, 'dynamic changes to float');
+
+ test(t => {
+   t.add_cleanup(() => {
+     legend3.id = 'legend3';
+     legend4.id = 'legend4';
+   });
+   legend4.id = '';
+   assert_rendered_legend(legend4);
+   legend3.id = '';
+   assert_rendered_legend(legend3);
+   legend3.id = 'legend3';
+   assert_rendered_legend(legend4);
+   legend4.id = 'legend4';
+   assert_rendered_legend(legend5);
+ }, 'dynamic changes to position');
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.tentative.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.tentative.html
index 1a5f8f7407e..51b442695e0 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.tentative.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.tentative.html
@@ -37,20 +37,20 @@
 
   const below_viewport_iframe_onload = t_below_viewport.step_func_done(() => {
     assert_true(has_window_loaded,
-                "The window.load() event should have fired before " +
+                "The window load event should have fired before " +
                 "the below-viewport iframe loads");
   });
 
   // Must make this accessible to the srcdoc iframe's body.
   window.below_viewport_srcdoc_iframe_subresource_onload = t_below_viewport_srcdoc.step_func(() => {
     assert_true(has_window_loaded,
-                "The window.load() event should have fired before " +
+                "The window load event should have fired before " +
                 "the below-viewport srcdoc iframe's subresource loads");
   });
 
   const below_viewport_srcdoc_iframe_onload = t_below_viewport_srcdoc.step_func_done(() => {
     assert_true(has_window_loaded,
-                "The window.load() event should have fired before " +
+                "The window load event should have fired before " +
                 "the below-viewport srcdoc iframe loads");
   });
 </script>
@@ -77,7 +77,7 @@
 
   <!-- This async script loads very slowly in order to ensure that, if the
        below_viewport* elements have started loading, it has a chance to finish
-       loading before window.load() happens, so that the test will dependably
+       loading before window load event fires, so that the test will dependably
        fail in that case instead of potentially passing depending on how long
        different resource fetches take. -->
   <script async src="/common/slow.py"></script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-below-viewport-dynamic.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-below-viewport-dynamic.html
index e27212cfd79..7fc2c742147 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-below-viewport-dynamic.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-below-viewport-dynamic.html
@@ -18,7 +18,7 @@
 
   window.addEventListener("load", t.step_func(function() {
     assert_false(has_window_loaded,
-                 "The window.load() event should only fire once.");
+                 "The window load event should only fire once.");
     has_window_loaded = true;
   }));
 
@@ -26,7 +26,7 @@
     assert_false(has_below_viewport_loaded,
                "The in_viewport element should load only once.");
     assert_true(has_window_loaded,
-                "The window.load() event should have fired before " +
+                "The window load event should have fired before " +
                 "below_viewport loaded.");
     has_below_viewport_loaded = true;
   });
@@ -38,7 +38,7 @@
        loading="lazy" onload="below_viewport_img_onload();">
   <script>
     assert_false(has_window_loaded,
-                "The window.load() event should not fire before " +
+                "The window load event should not fire before " +
                 "changing below_viewport to loading='eager'.");
     document.getElementById("below_viewport").loading = 'eager';
   </script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-in-viewport-dynamic.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-in-viewport-dynamic.html
index c9baceda587..982f09b8298 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-in-viewport-dynamic.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-in-viewport-dynamic.html
@@ -20,13 +20,13 @@
     assert_false(has_in_viewport_loaded,
                "The in_viewport element should load only once.");
     assert_true(has_window_loaded,
-               "The window.load() event should fire before in_viewport image loads.");
+               "The window load event should fire before in_viewport image loads.");
     has_in_viewport_loaded = true;
   });
 
   window.addEventListener("load", t.step_func(function() {
     assert_false(has_window_loaded,
-                 "The window.load() event should only fire once.");
+                 "The window load event should only fire once.");
     has_window_loaded = true;
   }));
 </script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-multicol.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-multicol.html
index 1458fb44b78..e906681932d 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-multicol.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-multicol.html
@@ -20,7 +20,7 @@
 
   window.addEventListener("load", t.step_func_done(function() {
     assert_true(has_in_viewport_loaded, "The in_viewport element should have loaded before window.load().");
-    assert_false(has_window_loaded, "The window.load() event should only fire once.");
+    assert_false(has_window_loaded, "The window load event should only fire once.");
     has_window_loaded = true;
   }));
 
@@ -37,7 +37,7 @@
   <!--
     This async script loads very slowly in order to ensure that, if the
     below_viewport element has started loading, it has a chance to finish
-    loading before window.load() happens, so that the test will dependably fail
+    loading before window load event fires, so that the test will dependably fail
     in that case instead of potentially passing depending on how long different
     resource fetches take.
   -->
diff --git a/tests/wpt/web-platform-tests/interfaces/appmanifest.idl b/tests/wpt/web-platform-tests/interfaces/appmanifest.idl
index cf30b612768..926a4fc2022 100644
--- a/tests/wpt/web-platform-tests/interfaces/appmanifest.idl
+++ b/tests/wpt/web-platform-tests/interfaces/appmanifest.idl
@@ -34,7 +34,6 @@ enum DisplayModeType {
 };
 
 dictionary ManifestImageResource : ImageResource {
-  USVString platform;
   USVString purpose;
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/custom-state-pseudo-class.idl b/tests/wpt/web-platform-tests/interfaces/custom-state-pseudo-class.idl
new file mode 100644
index 00000000000..8fcd287acd3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/custom-state-pseudo-class.idl
@@ -0,0 +1,8 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into reffy-reports
+// (https://github.com/tidoust/reffy-reports)
+// Source: Custom State Pseudo Class (https://wicg.github.io/custom-state-pseudo-class/)
+
+partial interface ElementInternals {
+  [SameObject, PutForwards=value] readonly attribute DOMTokenList states;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/deprecation-reporting.idl b/tests/wpt/web-platform-tests/interfaces/deprecation-reporting.idl
new file mode 100644
index 00000000000..e62711936b5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/deprecation-reporting.idl
@@ -0,0 +1,15 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into reffy-reports
+// (https://github.com/tidoust/reffy-reports)
+// Source: Deprecation Reporting (https://wicg.github.io/deprecation-reporting/)
+
+[Exposed=(Window,Worker)]
+interface DeprecationReportBody : ReportBody {
+  [Default] object toJSON();
+  readonly attribute DOMString id;
+  readonly attribute Date? anticipatedRemoval;
+  readonly attribute DOMString message;
+  readonly attribute DOMString? sourceFile;
+  readonly attribute unsigned long? lineNumber;
+  readonly attribute unsigned long? columnNumber;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/streams.idl b/tests/wpt/web-platform-tests/interfaces/streams.idl
index 4dddbf41cbf..35f558f624a 100644
--- a/tests/wpt/web-platform-tests/interfaces/streams.idl
+++ b/tests/wpt/web-platform-tests/interfaces/streams.idl
@@ -65,10 +65,15 @@ interface ReadableStreamDefaultReader {
   readonly attribute Promise<void> closed;
 
   Promise<void> cancel(optional any reason);
-  Promise<any> read();
+  Promise<ReadableStreamDefaultReadResult> read();
   void releaseLock();
 };
 
+dictionary ReadableStreamDefaultReadResult {
+ any value;
+ boolean done;
+};
+
 [Exposed=(Window,Worker,Worklet)]
 interface ReadableStreamBYOBReader {
   constructor(ReadableStream stream);
@@ -76,10 +81,15 @@ interface ReadableStreamBYOBReader {
   readonly attribute Promise<void> closed;
 
   Promise<void> cancel(optional any reason);
-  Promise<any> read(ArrayBufferView view);
+  Promise<ReadableStreamBYOBReadResult> read(ArrayBufferView view);
   void releaseLock();
 };
 
+dictionary ReadableStreamBYOBReadResult {
+ ArrayBufferView value;
+ boolean done;
+};
+
 [Exposed=(Window,Worker,Worklet)]
 interface ReadableStreamDefaultController {
   readonly attribute unrestricted double? desiredSize;
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/default-properties-on-the-math-root.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/default-properties-on-the-math-root.html
new file mode 100644
index 00000000000..80a09774a77
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/default-properties-on-the-math-root.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Default properties on the &lt;math&gt; root</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#user-agent-stylesheet">
+<meta name="assert" content="Test properties on the math root set by the UA stylesheet.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  math {
+      font-size: 100px;
+  }
+  .styled {
+      direction: rtl;
+      writing-mode: vertical-lr;
+      text-indent: .5em;
+      letter-spacing: .5em;
+      line-height: .5em;
+      word-spacing: .5em;
+      font-style: italic;
+      font-weight: bold;
+  }
+</style>
+
+</head>
+<body>
+  <div id="log"></div>
+  <div class="styled">
+    <math id="ua"></math>
+    <math id="author" class="styled"></math>
+  </div>
+
+  <script>
+    function getProperty(id, property) {
+        return window.getComputedStyle(document.getElementById(id))[property];
+    }
+    [
+        // Property name, value when specified from the UA, from the author.
+        ["direction", "ltr", "rtl"],
+        ["writing-mode", "horizontal-tb", "horizontal-tb"], // MathML Core level 1 only supports horizontal mode.
+        ["text-indent", "0px", "50px"],
+        ["letter-spacing", "normal", "50px"],
+        ["line-height", "normal", "50px"],
+        ["word-spacing", "0px", "50px"],
+        ["font-style", "normal", "italic"],
+        ["font-weight", "400", "700"]
+    ].forEach(([name, ua_value, author_value]) => {
+        test(function () {
+            assert_equals(getProperty("ua", name), ua_value, "when specified from the UA sheet");
+            assert_equals(getProperty("author", name), author_value, "when specified by the author");
+        }, `Value of ${name} on the <math> root`);
+    });
+  </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/tools/requirements_flake8.txt b/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
index ae3e4f4b5a6..f97916e03e9 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
@@ -1,4 +1,4 @@
 flake8==3.8.3
 pycodestyle==2.6.0
 pyflakes==2.2.0
-pep8-naming==0.10.0
+pep8-naming==0.11.1
diff --git a/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html b/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
index b6131d6a808..ce5b5ad6be6 100644
--- a/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
+++ b/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
@@ -64,9 +64,11 @@
 
   function getNoiseStreamOkCallback(localStream) {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
 
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
     gSecondConnection.ontrack = onRemoteTrack;
 
@@ -146,4 +148,4 @@
 </script>
 
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-duration-loop.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-duration-loop.html
new file mode 100644
index 00000000000..faa70e11c47
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-duration-loop.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>
+      Test AudioBufferSourceNode With Looping And Duration
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit-util.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+  </head>
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+      audit.define('loop with duration', (task, should) => {
+        // Create the context
+        let context = new OfflineAudioContext(1, 4096, 48000);
+
+        // Create the sample buffer and fill the second half with 1
+        let buffer = context.createBuffer(1, 2048, context.sampleRate);
+        for(let i = 1024; i < 2048; i++) {
+          buffer.getChannelData(0)[i] = 1;
+        }
+
+        // Create the source and set its value
+        let source = context.createBufferSource();
+        source.loop = true;
+        source.loopStart = 1024 / context.sampleRate;
+        source.loopEnd = 2048 / context.sampleRate;
+        source.buffer = buffer;
+        source.connect(context.destination);
+        source.start(0, 1024 / context.sampleRate, 2048 / context.sampleRate);
+        // Render it!
+        context.startRendering()
+          .then(function(audioBuffer) {
+            for(let i = 0; i < 2048; i++) {
+              assert_equals(audioBuffer.getChannelData(0)[i], 1,
+                  "audioBuffer did not loop as intended");
+            }
+            for(let i = 2048; i < 4096; i++) {
+              assert_equals(audioBuffer.getChannelData(0)[i], 0,
+                  "audioBuffer did not respect duration");
+            }
+          })
+          .then(task.done());
+      });
+
+      audit.run();
+
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-createDataChannel.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-createDataChannel.html
index 3d2169dffac..87867664b58 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-createDataChannel.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-createDataChannel.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCPeerConnection.prototype.createDataChannel</title>
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
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 851ce884d6e..d3126065b99 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-iceConnectionState.https.html
@@ -122,6 +122,8 @@
         assert_true(had_checking, 'state should pass checking before' +
                                   ' reaching connected or completed');
         t.done();
+      } else if (iceConnectionState === 'failed') {
+        assert_unreached("ICE should not fail");
       }
     });
 
@@ -165,6 +167,8 @@ async_test(t => {
           'Expect ICE transport to be in connected state when' +
           ' iceConnectionState is completed');
         t.done();
+      } else if (iceConnectionState === 'failed') {
+        assert_unreached("ICE should not fail");
       }
     });
 
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-tracks.https.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-tracks.https.html
index 59761c4c4bd..d2ee646e2c1 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-tracks.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-setRemoteDescription-tracks.https.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCPeerConnection.prototype.setRemoteDescription - add/remove remote tracks</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/webrtc/datachannel-emptystring.html b/tests/wpt/web-platform-tests/webrtc/datachannel-emptystring.html
index 6af436a1d1b..456bac7367e 100644
--- a/tests/wpt/web-platform-tests/webrtc/datachannel-emptystring.html
+++ b/tests/wpt/web-platform-tests/webrtc/datachannel-emptystring.html
@@ -76,8 +76,10 @@ and ensures that an empty string sent by one is received by the second.
 
   test.step(function() {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
 
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
 
     gFirstConnection.onicecandidate = exchangeIce(gSecondConnection);
     gSecondConnection.onicecandidate = exchangeIce(gFirstConnection);
diff --git a/tests/wpt/web-platform-tests/webrtc/getstats.html b/tests/wpt/web-platform-tests/webrtc/getstats.html
index 979e99c0b27..0950a374c3c 100644
--- a/tests/wpt/web-platform-tests/webrtc/getstats.html
+++ b/tests/wpt/web-platform-tests/webrtc/getstats.html
@@ -81,10 +81,12 @@ This test uses data only, and thus does not require fake media devices.
   // This function starts the test.
   test.step(function() {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
     gFirstConnection.oniceconnectionstatechange = onIceConnectionStateChange;
 
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
 
     // The createDataChannel is necessary and sufficient to make
diff --git a/tests/wpt/web-platform-tests/webrtc/no-media-call.html b/tests/wpt/web-platform-tests/webrtc/no-media-call.html
index dbe6a0dd4c2..b1eba08d0b4 100644
--- a/tests/wpt/web-platform-tests/webrtc/no-media-call.html
+++ b/tests/wpt/web-platform-tests/webrtc/no-media-call.html
@@ -113,10 +113,12 @@
   // This function starts the test.
   test.step(function() {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
     gFirstConnection.oniceconnectionstatechange = onIceConnectionStateChange;
 
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
     gSecondConnection.oniceconnectionstatechange = onIceConnectionStateChange;
 
diff --git a/tests/wpt/web-platform-tests/webrtc/promises-call.html b/tests/wpt/web-platform-tests/webrtc/promises-call.html
index ceb6ab258cc..8b9a2755497 100644
--- a/tests/wpt/web-platform-tests/webrtc/promises-call.html
+++ b/tests/wpt/web-platform-tests/webrtc/promises-call.html
@@ -66,10 +66,12 @@ This test uses data only, and thus does not require fake media devices.
   // This function starts the test.
   test.step(function() {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
     gFirstConnection.oniceconnectionstatechange = onIceConnectionStateChange;
 
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
     gSecondConnection.oniceconnectionstatechange = onIceConnectionStateChange;
 
diff --git a/tests/wpt/web-platform-tests/webrtc/simplecall-no-ssrcs.https.html b/tests/wpt/web-platform-tests/webrtc/simplecall-no-ssrcs.https.html
index 87f8d939a5a..5160451f012 100644
--- a/tests/wpt/web-platform-tests/webrtc/simplecall-no-ssrcs.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/simplecall-no-ssrcs.https.html
@@ -32,6 +32,7 @@
 
   function getNoiseStreamOkCallback(localStream) {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
     localStream.getTracks().forEach(function(track) {
       gFirstConnection.addTrack(track, localStream);
@@ -56,6 +57,7 @@
 
   function receiveCall(offerSdp) {
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
     gSecondConnection.ontrack = onRemoteTrack;
 
diff --git a/tests/wpt/web-platform-tests/webrtc/simplecall.https.html b/tests/wpt/web-platform-tests/webrtc/simplecall.https.html
index 291437a5265..ffe043b6a23 100644
--- a/tests/wpt/web-platform-tests/webrtc/simplecall.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/simplecall.https.html
@@ -32,6 +32,7 @@
 
   function getNoiseStreamOkCallback(localStream) {
     gFirstConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gFirstConnection.close());
     gFirstConnection.onicecandidate = onIceCandidateToFirst;
     localStream.getTracks().forEach(function(track) {
       gFirstConnection.addTrack(track, localStream);
@@ -52,6 +53,7 @@
 
   function receiveCall(offerSdp) {
     gSecondConnection = new RTCPeerConnection(null);
+    test.add_cleanup(() => gSecondConnection.close());
     gSecondConnection.onicecandidate = onIceCandidateToSecond;
     gSecondConnection.ontrack = onRemoteTrack;
 
diff --git a/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini b/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini
index 6d27ac4afa4..49509bce71d 100644
--- a/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini
+++ b/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini
@@ -182,3 +182,6 @@
   [WebGL test #50: attachment 5 should be 0,255,0,255\nat (4, 0) expected: 0,255,0,255 was 255,0,0,0]
     expected: FAIL
 
+  [WebGL test #52: attachment 7 should be 0,255,0,255\nat (0, 0) expected: 0,255,0,255 was 255,0,255,0]
+    expected: FAIL
+