diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
index 76b398963ae..a9e46713244 100644
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -7,7 +7,7 @@
     expected: FAIL
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
     expected: FAIL
diff --git a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
index 0bf3b469372..4c1aa18e695 100644
--- a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
@@ -2,8 +2,14 @@
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
+  [Revoke blob URL after calling fetch, fetch should succeed]
+    expected: FAIL
+
 
 [url-with-fetch.any.html]
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
+  [Revoke blob URL after calling fetch, fetch should succeed]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 85c96a326f6..4fdf726fd04 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -273357,6 +273357,12 @@
    "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-failure.js.headers": [
     []
    ],
+   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js": [
+    []
+   ],
+   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js.headers": [
+    []
+   ],
    "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/sharedworker-failure.js": [
     []
    ],
@@ -273387,6 +273393,9 @@
    "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-failure.https.html.headers": [
     []
    ],
+   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.headers": [
+    []
+   ],
    "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-sharedworker-failure.https.html.headers": [
     []
    ],
@@ -289632,6 +289641,9 @@
    "wasm/serialization/module/resources/serviceworker-failure.js": [
     []
    ],
+   "wasm/serialization/module/resources/serviceworker-success.js": [
+    []
+   ],
    "wasm/serialization/module/resources/sharedworker-failure.js": [
     []
    ],
@@ -312657,6 +312669,16 @@
      }
     ]
    ],
+   "compression/decompression-corrupt-input.any.js": [
+    [
+     "compression/decompression-corrupt-input.any.html",
+     {}
+    ],
+    [
+     "compression/decompression-corrupt-input.any.worker.html",
+     {}
+    ]
+   ],
    "compression/decompression-empty-input.tentative.any.js": [
     [
      "compression/decompression-empty-input.tentative.any.html",
@@ -323183,6 +323205,18 @@
      {}
     ]
    ],
+   "css/css-grid/parsing/grid-shorthand-invalid.html": [
+    [
+     "css/css-grid/parsing/grid-shorthand-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-grid/parsing/grid-shorthand-valid.html": [
+    [
+     "css/css-grid/parsing/grid-shorthand-valid.html",
+     {}
+    ]
+   ],
    "css/css-grid/parsing/grid-shorthand.html": [
     [
      "css/css-grid/parsing/grid-shorthand.html",
@@ -323267,6 +323301,18 @@
      {}
     ]
    ],
+   "css/css-grid/parsing/grid-template-shorthand-invalid.html": [
+    [
+     "css/css-grid/parsing/grid-template-shorthand-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-grid/parsing/grid-template-shorthand-valid.html": [
+    [
+     "css/css-grid/parsing/grid-template-shorthand-valid.html",
+     {}
+    ]
+   ],
    "css/css-grid/parsing/grid-template-shorthand.html": [
     [
      "css/css-grid/parsing/grid-template-shorthand.html",
@@ -358130,6 +358176,12 @@
      {}
     ]
    ],
+   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html": [
+    [
+     "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html",
+     {}
+    ]
+   ],
    "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-sharedworker-failure.https.html": [
     [
      "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-sharedworker-failure.https.html",
@@ -416726,9 +416778,9 @@
      {}
     ]
    ],
-   "trusted-types/idlharness.window.js": [
+   "trusted-types/idlharness.tentative.window.js": [
     [
-     "trusted-types/idlharness.window.html",
+     "trusted-types/idlharness.tentative.window.html",
      {
       "script_metadata": [
        [
@@ -423351,6 +423403,12 @@
      {}
     ]
    ],
+   "wasm/serialization/module/window-serviceworker-success.https.html": [
+    [
+     "wasm/serialization/module/window-serviceworker-success.https.html",
+     {}
+    ]
+   ],
    "wasm/serialization/module/window-sharedworker-failure.html": [
     [
      "wasm/serialization/module/window-sharedworker-failure.html",
@@ -471169,7 +471227,7 @@
    "support"
   ],
   "common/security-features/resources/common.sub.js": [
-   "b43417b417c189d1e1b3444baa286456df979bb5",
+   "cdd20a9d8daecefec26c1fe3ef5d7f2a4ed48008",
    "support"
   ],
   "common/security-features/resources/common.sub.js.headers": [
@@ -471548,6 +471606,10 @@
    "11d8736cb225d6ce575677dcdb70b0a19dd4f65f",
    "testharness"
   ],
+  "compression/decompression-corrupt-input.any.js": [
+   "95e91b662ee47f545167cd05dc4d06b85cb74b00",
+   "testharness"
+  ],
   "compression/decompression-empty-input.tentative.any.js": [
    "ff4cff522a4a7ba0ba3eedb79c4d39b0752c9caf",
    "testharness"
@@ -579089,7 +579151,7 @@
    "testharness"
   ],
   "css/css-grid/parsing/grid-area-valid.html": [
-   "8e7d0d43d1cfac44935593892b67fdb40b179791",
+   "9f93e6325b1b3cb2fff53f1c9e8b4963ac875e09",
    "testharness"
   ],
   "css/css-grid/parsing/grid-auto-columns-computed.html": [
@@ -579128,6 +579190,14 @@
    "d4dcdb12b177cf97c3aa030cbb19c2ce2ae6d25d",
    "testharness"
   ],
+  "css/css-grid/parsing/grid-shorthand-invalid.html": [
+   "642a4abab3b8177982c4006e4a5c0477d035305a",
+   "testharness"
+  ],
+  "css/css-grid/parsing/grid-shorthand-valid.html": [
+   "435959af25e0f03b8f53844f907430daa3d36d97",
+   "testharness"
+  ],
   "css/css-grid/parsing/grid-shorthand.html": [
    "91995608dd9eda5cd8d99abe3454cd67e52e405b",
    "testharness"
@@ -579184,6 +579254,14 @@
    "2d3a1ed8045c3eef9982cffc3f95415518f560cb",
    "testharness"
   ],
+  "css/css-grid/parsing/grid-template-shorthand-invalid.html": [
+   "366cdf4d887aa937875cd5e5a49631d1b3e283b1",
+   "testharness"
+  ],
+  "css/css-grid/parsing/grid-template-shorthand-valid.html": [
+   "042268f334816172b077edf341b1c091196f5197",
+   "testharness"
+  ],
   "css/css-grid/parsing/grid-template-shorthand.html": [
    "b9165359a7250afab60463878b9beb8592424f58",
    "testharness"
@@ -652148,6 +652226,14 @@
    "6604450991a122e3e241e40b1b9e0516c525389d",
    "support"
   ],
+  "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js": [
+   "34add843ecaaff85b5d50b6eab31a616226f9234",
+   "support"
+  ],
+  "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js.headers": [
+   "20319c1b02dda1ca0d40a0cae6bf6b460f5562f1",
+   "support"
+  ],
   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/sharedworker-failure.js": [
    "8472318abd53207ec56b3f5988fb0a49d0c006a4",
    "support"
@@ -652220,6 +652306,14 @@
    "63b60e490f47f4db77d33d7a4ca2f5b9a4181de8",
    "support"
   ],
+  "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html": [
+   "3d5ced9760625793950bf27934c182f48420a487",
+   "testharness"
+  ],
+  "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.headers": [
+   "4fff9d9fba4c81f953826ffea010a75be626b95d",
+   "support"
+  ],
   "html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-sharedworker-failure.https.html": [
    "023cb5acdef1c144dbad4ebefd0af23fc6c17d79",
    "testharness"
@@ -666261,7 +666355,7 @@
    "testharness"
   ],
   "lint.whitelist": [
-   "be6ae4f0314942a35632a1b0dc8b10dd9dd34657",
+   "48d7e9d6a747b973333912b6e940055449f2f5ce",
    "support"
   ],
   "loading/lazyload/common.js": [
@@ -711280,8 +711374,8 @@
    "074fe79dc93fee6563bcb9ce2db3fa708bf4ad4f",
    "testharness"
   ],
-  "trusted-types/idlharness.window.js": [
-   "7be9615ce67ca1582c3b82ed849d7019a61e4cdd",
+  "trusted-types/idlharness.tentative.window.js": [
+   "5a854a12b78026a3318dad70ffa0d6a690e39f55",
    "testharness"
   ],
   "trusted-types/support/WorkerGlobalScope-importScripts.https.js": [
@@ -716412,6 +716506,10 @@
    "39796f9d94a39d2a13ed832544ce781373a20655",
    "support"
   ],
+  "wasm/serialization/module/resources/serviceworker-success.js": [
+   "89dd8a3831b138cb6c4eb2a5578b95bb711cd189",
+   "support"
+  ],
   "wasm/serialization/module/resources/sharedworker-failure.js": [
    "854c70b9e84e6e6fb1c59f64a06a79646a122576",
    "support"
@@ -716444,6 +716542,10 @@
    "97c5a1decdb85317930508ece8f306fb80880ca2",
    "testharness"
   ],
+  "wasm/serialization/module/window-serviceworker-success.https.html": [
+   "a479b37e5e227e4961f59e09554c137041528124",
+   "testharness"
+  ],
   "wasm/serialization/module/window-sharedworker-failure.html": [
    "667e985a30b53c0ecadfd4c68f6217b87a7a5b98",
    "testharness"
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 9abfe827b60..81b7704b14e 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -309,21 +309,21 @@
   [<iframe>: separate response Content-Type: */* text/html]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
   [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+  [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
+  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
     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..8d0261f22a0 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 +53,9 @@
   [combined text/javascript ]
     expected: FAIL
 
+  [separate text/javascript x/x]
+    expected: FAIL
+
+  [separate text/javascript; charset=windows-1252 text/javascript]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
deleted file mode 100644
index 87b07c3e670..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_1.html]
-  [Multiple history traversals from the same task]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
similarity index 71%
rename from tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
rename to tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
index 51f8272a6de..75d75b4cda2 100644
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_3.html]
+[traverse_the_history_2.html]
   [Multiple history traversals, last would be aborted]
     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/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
index e02f179ec25..bf50d59df41 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-innerwidth-innerheight.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `innerwidth`, `innerheight`]
     expected: FAIL
 
-  [features "innerheight=-404.5" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=-404.5" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=-404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=-404e1" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=-404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=-404e1" should NOT set "width=404"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
index 23eefb8eaf9..e150c9d848f 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-screenx-screeny.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `screenx`, `screeny`]
     expected: FAIL
 
-  [features "screenx=-204" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-204" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-204.5" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screeny=-0" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "screenx=-0" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "screenx=-204.5" should NOT set "left=204"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
index 940516ddd33..ad8840fbb68 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-top-left.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `top`, `left`]
     expected: FAIL
 
-  [features "top=-204" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "top=-204.5" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "left=-204" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "top=-0" should NOT set "top=204"]
-    expected: TIMEOUT
-
-  [features "left=-204.5" should NOT set "left=204"]
-    expected: TIMEOUT
-
-  [features "left=-0" should NOT set "left=204"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
index 4e44584b123..a70e9dbad4d 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
@@ -1,48 +1,32 @@
 [open-features-non-integer-height.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `height`]
     expected: FAIL
 
   [features "height=405*3" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405.5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "height=405LLl" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "height=/404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [top=0,left=0,width=401,: absence of feature "height" should be treated same as "height=0"]
-    expected: TIMEOUT
-
-  [top=0,left=0: absence of feature "height" should be treated same as "height=0"]
-    expected: TIMEOUT
-
-  [features "height=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=L404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
index fcaeae5336d..779531b4a98 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-innerheight.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerheight`]
     expected: FAIL
 
   [features "innerheight=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405LLl" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405.5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerheight=405*3" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "innerheight=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=L404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "innerheight=/404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
index 42327fedd27..7a1b258d52e 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-innerwidth.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerwidth`]
     expected: FAIL
 
   [features "innerwidth=405e-1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405*3" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405.5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405e1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405.32" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405  " should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405LLl" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405/5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "innerwidth=405^4" should set "width=405"]
-    expected: TIMEOUT
-
-  [features "innerwidth=/404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=_404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "innerwidth=L404" should NOT set "width=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
index a8e4fe06618..caba4124f0b 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-left.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `left`]
     expected: FAIL
 
   [features "left=105e1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105  " should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105/5" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105e-1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105^4" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105LLl" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105.32" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105*3" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "left=105.5" should set "left=105"]
-    expected: TIMEOUT
-
-  [features "left=L104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "left=/104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "left=_104" should NOT set "left=104"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
index 64a08faf0e6..9ace8a4cbdb 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-screenx.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screenx`]
     expected: FAIL
 
   [features "screenx=105.5" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105e1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105  " should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105*3" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105e-1" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105^4" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105LLl" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105/5" should set "left=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screenx=105.32" should set "left=105"]
-    expected: TIMEOUT
-
-  [features "screenx=_104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "screenx=L104" should NOT set "left=104"]
-    expected: TIMEOUT
-
-  [features "screenx=/104" should NOT set "left=104"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
index 4f22ef4ef29..a82bd0f981a 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-screeny.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screeny`]
     expected: FAIL
 
   [features "screeny=405^4" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405e-1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405LLl" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405e1" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405  " should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405/5" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405*3" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405.32" should set "height=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "screeny=405.5" should set "height=405"]
-    expected: TIMEOUT
-
-  [features "screeny=_404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "screeny=L404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "screeny=/404" should NOT set "height=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
index 8540f53d8d6..10f617db69e 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
@@ -1,42 +1,32 @@
 [open-features-non-integer-top.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `top`]
     expected: FAIL
 
   [features "top=105/5" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105*3" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105LLl" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105e-1" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105.32" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105e1" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105  " should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105^4" should set "top=105"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "top=105.5" should set "top=105"]
-    expected: TIMEOUT
-
-  [features "top=/104" should NOT set "top=104"]
-    expected: TIMEOUT
-
-  [features "top=_104" should NOT set "top=104"]
-    expected: TIMEOUT
-
-  [features "top=L104" should NOT set "top=104"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
index 9d841e61bc0..28f93ee71b5 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
@@ -1,48 +1,32 @@
 [open-features-non-integer-width.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `width`]
     expected: FAIL
 
   [features "width=405^4" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405.5" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405e1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405  " should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405.32" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405LLl" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405*3" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405e-1" should set "width=405"]
-    expected: TIMEOUT
+    expected: FAIL
 
   [features "width=405/5" should set "width=405"]
-    expected: TIMEOUT
-
-  [top=0,left=0: absence of feature "width" should be treated same as "width=0"]
-    expected: TIMEOUT
-
-  [features "width=_404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [top=0,left=0,height=401,: absence of feature "width" should be treated same as "width=0"]
-    expected: TIMEOUT
-
-  [features "width=/404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=L404" should NOT set "width=404"]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
index fd369192a02..442db3cb549 100644
--- a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
@@ -1,5 +1,4 @@
 [embedded-opener-remove-frame.html]
-  expected: TIMEOUT
   [opener and "removed" embedded documents]
     expected: FAIL
 
@@ -7,5 +6,5 @@
     expected: FAIL
 
   [opener of discarded auxiliary browsing context]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.ini b/tests/wpt/metadata/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.ini
new file mode 100644
index 00000000000..3df50b20c36
--- /dev/null
+++ b/tests/wpt/metadata/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.ini
@@ -0,0 +1,4 @@
+[window-serviceworker-success.https.html]
+  [Test ServiceWorkerContainer.onmessageerror using SharedArrayBuffer]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index 963d4cd20ef..9df1ac56f2a 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: 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/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/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
deleted file mode 100644
index a9677391662..00000000000
--- a/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[DOMContentLoaded-defer.html]
-  [The end: DOMContentLoaded and defer scripts]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini
deleted file mode 100644
index 1e9b11d3487..00000000000
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[promise-rejection-events-onerror.html]
-  expected: TIMEOUT
-  [Throwing inside an unhandledrejection handler invokes the error handler.]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/wasm/serialization/module/window-serviceworker-success.https.html.ini b/tests/wpt/metadata/wasm/serialization/module/window-serviceworker-success.https.html.ini
new file mode 100644
index 00000000000..adc01e32532
--- /dev/null
+++ b/tests/wpt/metadata/wasm/serialization/module/window-serviceworker-success.https.html.ini
@@ -0,0 +1,4 @@
+[window-serviceworker-success.https.html]
+  [Test ServiceWorkerContainer.onmessageerror using WebAssembly.Module]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
index a56bad443a2..66bd350083b 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@@ -1,5 +1,4 @@
 [realtimeanalyser-fft-scaling.html]
-  expected: TIMEOUT
   [X 2048-point FFT peak position is not equal to 64. Got 0.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
new file mode 100644
index 00000000000..064cf47545b
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/with-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/web-platform-tests/common/security-features/resources/common.sub.js b/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
index b43417b417c..cdd20a9d8da 100644
--- a/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
+++ b/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
@@ -286,9 +286,17 @@ function bindEvents2(resolveObject, resolveEventName, rejectObject, rejectEventN
 function createElement(tagName, attrs, parentNode, doBindEvents) {
   var element = document.createElement(tagName);
 
-  if (doBindEvents)
+  if (doBindEvents) {
     bindEvents(element);
-
+    if (element.tagName == "IFRAME" && !('srcdoc' in attrs || 'src' in attrs)) {
+      // If we're loading a frame, ensure we spin the event loop after load to
+      // paper over the different event timing in Gecko vs Blink/WebKit
+      // see https://github.com/whatwg/html/issues/4965
+      element.eventPromise = element.eventPromise.then(() => {
+        return new Promise(resolve => setTimeout(resolve, 0))
+      });
+    }
+  }
   // We set the attributes after binding to events to catch any
   // event-triggering attribute changes. E.g. form submission.
   //
diff --git a/tests/wpt/web-platform-tests/compression/decompression-corrupt-input.any.js b/tests/wpt/web-platform-tests/compression/decompression-corrupt-input.any.js
new file mode 100644
index 00000000000..95e91b662ee
--- /dev/null
+++ b/tests/wpt/web-platform-tests/compression/decompression-corrupt-input.any.js
@@ -0,0 +1,299 @@
+// META global=worker
+
+// This test checks that DecompressionStream behaves according to the standard
+// when the input is corrupted. To avoid a combinatorial explosion in the
+// number of tests, we only mutate one field at a time, and we only test
+// "interesting" values.
+
+'use strict';
+
+// The many different cases are summarised in this data structure.
+const expectations = [
+  {
+    format: 'deflate',
+
+    // Decompresses to 'expected output'.
+    baseInput: [120, 156, 75, 173, 40, 72, 77, 46, 73, 77, 81, 200, 47, 45, 41,
+                40, 45, 1, 0, 48, 173, 6, 36],
+
+    // See RFC1950 for the definition of the various fields used by deflate:
+    // https://tools.ietf.org/html/rfc1950.
+    fields: [
+      {
+        // The function of this field. This matches the name used in the RFC.
+        name: 'CMF',
+
+        // The offset of the field in bytes from the start of the input.
+        offset: 0,
+
+        // The length of the field in bytes.
+        length: 1,
+
+        cases: [
+          {
+            // The value to set the field to. If the field contains multiple
+            // bytes, all the bytes will be set to this value.
+            value: 0,
+
+            // The expected result. 'success' means the input is decoded
+            // successfully. 'error' means that the stream will be errored.
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'FLG',
+        offset: 1,
+        length: 1,
+
+        // FLG contains a 4-bit checksum (FCHECK) which is calculated in such a
+        // way that there are 4 valid values for this field.
+        cases: [
+          {
+            value: 218,
+            result: 'success'
+          },
+          {
+            value: 1,
+            result: 'success'
+          },
+          {
+            value: 94,
+            result: 'success'
+          },
+          {
+            // The remaining 252 values cause an error.
+            value: 157,
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'DATA',
+        // In general, changing any bit of the data will trigger a checksum
+        // error. Only the last byte does anything else.
+        offset: 18,
+        length: 1,
+        cases: [
+          {
+            value: 4,
+            result: 'success'
+          },
+          {
+            value: 5,
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'ADLER',
+        offset: -4,
+        length: 4,
+        cases: [
+          {
+            value: 255,
+            result: 'error'
+          }
+        ]
+      }
+    ]
+  },
+  {
+    format: 'gzip',
+
+    // Decompresses to 'expected output'.
+    baseInput: [31, 139, 8, 0, 0, 0, 0, 0, 0, 3, 75, 173, 40, 72, 77, 46, 73,
+                77, 81, 200, 47, 45, 41, 40, 45, 1, 0, 176, 1, 57, 179, 15, 0,
+                0, 0],
+
+    // See RFC1952 for the definition of the various fields used by gzip:
+    // https://tools.ietf.org/html/rfc1952.
+    fields: [
+      {
+        name: 'ID',
+        offset: 0,
+        length: 2,
+        cases: [
+          {
+            value: 255,
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'CM',
+        offset: 2,
+        length: 1,
+        cases: [
+          {
+            value: 0,
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'FLG',
+        offset: 3,
+        length: 1,
+        cases: [
+          {
+            value: 1, // FTEXT
+            result: 'success'
+          },
+          {
+            value: 2, // FHCRC
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'MTIME',
+        offset: 4,
+        length: 4,
+        cases: [
+          {
+            // Any value is valid for this field.
+            value: 255,
+            result: 'success'
+          }
+        ]
+      },
+      {
+        name: 'XFL',
+        offset: 8,
+        length: 1,
+        cases: [
+          {
+            // Any value is accepted.
+            value: 255,
+            result: 'success'
+          }
+        ]
+      },
+      {
+        name: 'OS',
+        offset: 9,
+        length: 1,
+        cases: [
+          {
+            // Any value is accepted.
+            value: 128,
+            result: 'success'
+          }
+        ]
+      },
+      {
+        name: 'DATA',
+
+        // The last byte of the data is the most interesting.
+        offset: 26,
+        length: 1,
+        cases: [
+          {
+            value: 3,
+            result: 'error'
+          },
+          {
+            value: 4,
+            result: 'success'
+          }
+        ]
+      },
+      {
+        name: 'CRC',
+        offset: -8,
+        length: 4,
+        cases: [
+          {
+            // Any change will error the stream.
+            value: 0,
+            result: 'error'
+          }
+        ]
+      },
+      {
+        name: 'ISIZE',
+        offset: -4,
+        length: 4,
+        cases: [
+          {
+            // A mismatch will error the stream.
+            value: 1,
+            result: 'error'
+          }
+        ]
+      }
+    ]
+  }
+];
+
+async function tryDecompress(input, format) {
+  const ds = new DecompressionStream(format);
+  const reader = ds.readable.getReader();
+  const writer = ds.writable.getWriter();
+  writer.write(input).catch(() => {});
+  writer.close().catch(() => {});
+  let out = [];
+  while (true) {
+    try {
+      const { value, done } = await reader.read();
+      if (done) {
+        break;
+      }
+      out = out.concat(Array.from(value));
+    } catch (e) {
+      return { result: 'error' };
+    }
+  }
+  const expectedOutput = 'expected output';
+  if (out.length !== expectedOutput.length) {
+    return { result: 'corrupt' };
+  }
+  for (let i = 0; i < out.length; ++i) {
+    if (out[i] !== expectedOutput.charCodeAt(i)) {
+      return { result: 'corrupt' };
+    }
+  }
+  return { result: 'success' };
+}
+
+function corruptInput(input, offset, length, value) {
+  const output = new Uint8Array(input);
+  if (offset < 0) {
+    offset += input.length;
+  }
+  for (let i = offset; i < offset + length; ++i) {
+    output[i] = value;
+  }
+  return output;
+}
+
+for (const { format, baseInput, fields } of expectations) {
+  promise_test(async () => {
+    const { result } = await tryDecompress(new Uint8Array(baseInput), format);
+    assert_equals(result, 'success', 'decompression should succeed');
+  }, `the unchanged input for '${format}' should decompress successfully`);
+
+  promise_test(async () => {
+    const truncatedInput = new Uint8Array(baseInput.slice(0, -1));
+    const { result } = await tryDecompress(truncatedInput, format);
+    assert_equals(result, 'error', 'decompression should fail');
+  }, `truncating the input for '${format}' should give an error`);
+
+  promise_test(async () => {
+    const extendedInput = new Uint8Array(baseInput.concat([0]));
+    const { result } = await tryDecompress(extendedInput, format);
+    assert_equals(result, 'error', 'decompression should fail');
+  }, `trailing junk for '${format}' should give an error`);
+
+  for (const { name, offset, length, cases } of fields) {
+    for (const { value, result } of cases) {
+      promise_test(async () => {
+        const corruptedInput = corruptInput(baseInput, offset, length, value);
+        const { result: actual } =
+              await tryDecompress(corruptedInput, format);
+        assert_equals(actual, result, 'result should match');
+      }, `format '${format}' field ${name} should be ${result} for ${value}`);
+    }
+  }
+}
diff --git a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-area-valid.html b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-area-valid.html
index 8e7d0d43d1c..9f93e6325b1 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-area-valid.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-area-valid.html
@@ -13,26 +13,32 @@
 <body>
 <script>
 // auto
-test_valid_value("grid-area", "auto", "auto / auto / auto / auto");
-test_valid_value("grid-area", "AuTo", "auto / auto / auto / auto");
-test_valid_value("grid-row", "auto", "auto / auto");
+test_valid_value("grid-area", "auto");
+test_valid_value("grid-area", "auto / auto", "auto");
+test_valid_value("grid-area", "auto / auto / auto", "auto");
+test_valid_value("grid-area", "auto / auto / auto / auto", "auto");
+test_valid_value("grid-area", "AuTo", "auto");
+test_valid_value("grid-row", "auto");
+test_valid_value("grid-row", "auto/auto", "auto");
 test_valid_value("grid-column-end", "AuTo", "auto");
 
 // <custom-ident>
-test_valid_value("grid-area", "--a", "--a / --a / --a / --a");
-test_valid_value("grid-row", "-zπ", "-zπ / -zπ");
+test_valid_value("grid-area", "--a");
+test_valid_value("grid-row", "-zπ");
+test_valid_value("grid-row", "-zπ/-zπ", "-zπ");
+test_valid_value("grid-row", "i / i", "i");
 test_valid_value("grid-row-start", "AZ");
 test_valid_value("grid-column-start", "-_π");
 test_valid_value("grid-row-end", "_9");
 
 
 // <integer> && <custom-ident>?
-test_valid_value("grid-area", "1", "1 / auto / auto / auto");
-test_valid_value("grid-area", "+90 -a-", "90 -a- / auto / auto / auto");
-test_valid_value("grid-row", "az 2", "2 az / auto");
-test_valid_value("grid-column", "9", "9 / auto");
-test_valid_value("grid-column", "-19 zA", "-19 zA / auto");
-test_valid_value("grid-column", "-A0 33", "33 -A0 / auto");
+test_valid_value("grid-area", "1");
+test_valid_value("grid-area", "+90 -a-", "90 -a-");
+test_valid_value("grid-row", "az 2", "2 az");
+test_valid_value("grid-column", "9");
+test_valid_value("grid-column", "-19 zA");
+test_valid_value("grid-column", "-A0 33", "33 -A0");
 test_valid_value("grid-row-start", "-19");
 test_valid_value("grid-row-start", "9 -Z_");
 test_valid_value("grid-column-start", "+90", "90");
@@ -41,27 +47,41 @@ test_valid_value("grid-row-end", "1 -πA");
 test_valid_value("grid-column-end", "π_ +5", "5 π_");
 
 // span && [ <integer> || <custom-ident> ]
-test_valid_value("grid-area", "span 2 i", "span 2 i / auto / auto / auto");
-test_valid_value("grid-area", "i 2 SpAn", "span 2 i / auto / auto / auto");
-test_valid_value("grid-row", "span 2", "span 2 / auto");
-test_valid_value("grid-column", "i SpAn", "span i / auto");
-test_valid_value("grid-row-start", "span i", "span i");
+test_valid_value("grid-area", "span 2 i");
+test_valid_value("grid-area", "i 2 SpAn", "span 2 i");
+test_valid_value("grid-row", "span 2");
+test_valid_value("grid-column", "i SpAn", "span i");
+test_valid_value("grid-row-start", "span i");
 test_valid_value("grid-column-start", "SpAn i 2", "span 2 i");
 test_valid_value("grid-row-end", "2 i span", "span 2 i");
 test_valid_value("grid-column-end", "2 SpAn", "span 2");
 
 // <grid-line> [ / <grid-line> ]{0,3}
-test_valid_value("grid-area", "auto / i", "auto / i / auto / i");
-test_valid_value("grid-area", "auto / i / 2 j", "auto / i / 2 j / i");
+test_valid_value("grid-area", "auto / i");
+test_valid_value("grid-area", "auto / i / auto / i", "auto / i");
+test_valid_value("grid-area", "auto / i / auto / 2 i");
+test_valid_value("grid-area", "1 / i  / auto / i", "1 / i");
+test_valid_value("grid-area", "1 / auto / auto / auto", "1");
+test_valid_value("grid-area", "1 / auto / i / auto", "1 / auto / i");
+test_valid_value("grid-area", "1 / j / i / k");
+test_valid_value("grid-area", "1 / auto / 2 / auto", "1 / auto / 2");
+test_valid_value("grid-area", "1 / i / 2 / auto");
+test_valid_value("grid-area", "i / i / auto / auto");
+test_valid_value("grid-area", "i / auto / i / auto", "i / auto");
+test_valid_value("grid-area", "auto / i / 2 j");
 test_valid_value("grid-area", "auto / i / 2 j / span 3 k");
 test_valid_value("grid-row", "auto / i");
+test_valid_value("grid-row", "i / auto");
+test_valid_value("grid-row", "2 i / auto", "2 i");
+test_valid_value("grid-row", "1 / auto", "1");
 test_valid_value("grid-column", "2 j / span 3 k");
 
-
 // https://github.com/w3c/csswg-drafts/issues/2858
-// '\\31 st' in Blink, Firefox, '1st' in Edge, '"1st"' in Safari.
-test_valid_value("grid-column-end",  "\\31st", ["\\31 st", "1st", '"1st"']);
-test_valid_value("grid-column-end",  "\\31 st", ["\\31 st", "1st", '"1st"']);
+// '\\31 st' in Blink, Firefox, EdgeHTML and Safari serialize invalid values.
+test_valid_value("grid-column-end", "\\31st", ["\\31 st", "\\31st"]);
+test_valid_value("grid-column-end", "\\31 st", ["\\31 st", "\\31st"]);
+test_valid_value("grid-column", "\\31st / \\31 st", ["\\31 st", "\\31st"]);
+
 </script>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-invalid.html b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-invalid.html
new file mode 100644
index 00000000000..642a4abab3b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-invalid.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: parsing 'grid' with invalid values</title>
+<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#propdef-grid">
+<meta name="assert" content="grid-template supports only the grammar `<'grid-template'> | <'grid-template-rows'> / [ auto-flow && dense? ] <'grid-auto-columns'>? | [ auto-flow && dense? ] <'grid-auto-rows'>? / <'grid-template-columns'>`.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+
+test_invalid_value("grid", 'none none');
+test_invalid_value("grid", 'none []');
+test_invalid_value("grid", '10px');
+test_invalid_value("grid", '20%');
+test_invalid_value("grid", '5fr');
+test_invalid_value("grid", '[a]');
+test_invalid_value("grid", '[a] 10px');
+test_invalid_value("grid", '[a] 10px []');
+test_invalid_value("grid", '[]');
+test_invalid_value("grid", '10px "a"');
+test_invalid_value("grid", '[] 10px "a"');
+test_invalid_value("grid", '10px [] "a"');
+test_invalid_value("grid", '[] [] "a"');
+test_invalid_value("grid", '"a" none');
+test_invalid_value("grid", '"a" 10px 10px');
+test_invalid_value("grid", '"a" [a] 10px');
+test_invalid_value("grid", '"a" [a] 10px [a]');
+test_invalid_value("grid", '"a" [a] [a] 10px');
+test_invalid_value("grid", '"a" 10px [a] [a]');
+test_invalid_value("grid", '"a" [a] [a]');
+test_invalid_value("grid", '[a] "a" [a] [a]');
+test_invalid_value("grid", '"a" "a" [a] [a]');
+test_invalid_value("grid", '"a" [a] [a] / none');
+test_invalid_value("grid", '"a" "a" [a] [a] / none');
+test_invalid_value("grid", 'none / "a"');
+test_invalid_value("grid", '"a" / none');
+test_invalid_value("grid", 'none / [] "a"');
+test_invalid_value("grid", 'none / "a" []');
+test_invalid_value("grid", 'none / "a" [] 10px');
+
+// FIXME: add more values to test full syntax
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-valid.html b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-valid.html
new file mode 100644
index 00000000000..435959af25e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-shorthand-valid.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: parsing 'grid' with valid values</title>
+<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#propdef-grid">
+<meta name="assert" content="grid-template supports the grammar `<'grid-template'> | <'grid-template-rows'> / [ auto-flow && dense? ] <'grid-auto-columns'>? | [ auto-flow && dense? ] <'grid-auto-rows'>? / <'grid-template-columns'>`.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+
+// <'grid-template'> values
+test_valid_value("grid", 'auto / auto');
+test_valid_value("grid", 'none / [a] 0px');
+test_valid_value("grid", 'none / [] 0px', 'none / 0px');
+test_valid_value("grid", '[a] 10px / auto');
+test_valid_value("grid", '[a] 10px / none');
+test_valid_value("grid", '[] 10px [] / [] auto []', '10px / auto');
+test_valid_value("grid", '[a] "a" 10px');
+test_valid_value("grid", '[a] "a" 10px []', '[a] "a" 10px');
+test_valid_value("grid", '"a" 10px');
+test_valid_value("grid", '[] "a" 10px', '"a" 10px');
+test_valid_value("grid", '[a] "a" 10px [a]');
+
+// FIXME: add more values to test full syntax
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-invalid.html b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-invalid.html
new file mode 100644
index 00000000000..366cdf4d887
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-invalid.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: parsing grid-template with invalid values</title>
+<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#propdef-grid-template">
+<meta name="assert" content="grid-template supports only the grammar `none | [ <'grid-template-rows'> / <'grid-template-columns'> ] | [ <line-names>? <string> <track-size>? <line-names>? ]+ [ / <explicit-track-list> ]?`.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+
+test_invalid_value("grid-template", 'auto');
+test_invalid_value("grid-template", 'none none');
+test_invalid_value("grid-template", 'none []');
+test_invalid_value("grid-template", '10px');
+test_invalid_value("grid-template", '20%');
+test_invalid_value("grid-template", '5fr');
+test_invalid_value("grid-template", '[a]');
+test_invalid_value("grid-template", '[a] 10px');
+test_invalid_value("grid-template", '[a] 10px []');
+test_invalid_value("grid-template", '[]');
+test_invalid_value("grid-template", '10px "a"');
+test_invalid_value("grid-template", '[] 10px "a"');
+test_invalid_value("grid-template", '10px [] "a"');
+test_invalid_value("grid-template", '[] [] "a"');
+test_invalid_value("grid-template", '"a" none');
+test_invalid_value("grid-template", '"a" 10px 10px');
+test_invalid_value("grid-template", '"a" [a] 10px');
+test_invalid_value("grid-template", '"a" [a] 10px [a]');
+test_invalid_value("grid-template", '"a" [a] [a] 10px');
+test_invalid_value("grid-template", '"a" 10px [a] [a]');
+test_invalid_value("grid-template", '"a" [a] [a]');
+test_invalid_value("grid-template", '[a] "a" [a] [a]');
+test_invalid_value("grid-template", '"a" "a" [a] [a]');
+test_invalid_value("grid-template", '"a" [a] [a] / none');
+test_invalid_value("grid-template", '"a" "a" [a] [a] / none');
+test_invalid_value("grid-template", 'none / "a"');
+test_invalid_value("grid-template", '"a" / none');
+test_invalid_value("grid-template", 'none / [] "a"');
+test_invalid_value("grid-template", 'none / "a" []');
+test_invalid_value("grid-template", 'none / "a" [] 10px');
+
+// FIXME: add more values to test full syntax
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-valid.html b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-valid.html
new file mode 100644
index 00000000000..042268f3348
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/parsing/grid-template-shorthand-valid.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: parsing grid-template with valid values</title>
+<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/css-grid/#propdef-grid-template">
+<meta name="assert" content="grid-template supports the grammar `none | [ <'grid-template-rows'> / <'grid-template-columns'> ] | [ <line-names>? <string> <track-size>? <line-names>? ]+ [ / <explicit-track-list> ]?`.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+
+test_valid_value("grid-template", 'auto / auto');
+test_valid_value("grid-template", 'none / [a] 0px');
+test_valid_value("grid-template", 'none / [] 0px', 'none / 0px');
+test_valid_value("grid-template", '[a] 10px / auto');
+test_valid_value("grid-template", '[a] 10px / none');
+test_valid_value("grid-template", '[] 10px [] / [] auto []', '10px / auto');
+test_valid_value("grid-template", '[a] "a" 10px');
+test_valid_value("grid-template", '[a] "a" 10px []', '[a] "a" 10px');
+test_valid_value("grid-template", '"a" 10px');
+test_valid_value("grid-template", '[] "a" 10px', '"a" 10px');
+test_valid_value("grid-template", '[a] "a" 10px [a]');
+
+// FIXME: add more values to test full syntax
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js
new file mode 100644
index 00000000000..34add843eca
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js
@@ -0,0 +1,18 @@
+"use strict";
+self.importScripts("/resources/testharness.js");
+
+let state = "start in worker";
+
+self.onmessage = e => {
+  if (e.data === "start in window") {
+    assert_equals(state, "start in worker");
+    e.source.postMessage(state);
+    state = "waiting for message from the window";
+  } else if (e.data === "we are expecting a messageerror due to the worker sending us a SAB")  {
+    assert_equals(state, "waiting for message from the window");
+    e.source.postMessage(new SharedArrayBuffer());
+    state = "done in worker";
+  } else {
+    e.source.postMessage(`worker onmessage was reached when in state "${state}" and data ${e.data}`);
+  }
+};
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js.headers b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js.headers
new file mode 100644
index 00000000000..20319c1b02d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/resources/serviceworker-success.js.headers
@@ -0,0 +1 @@
+Cross-Origin-Embedder-Policy: require-corp
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html
new file mode 100644
index 00000000000..3d5ced97606
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test ServiceWorkerContainer.onmessageerror using SharedArrayBuffer</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
+
+<script>
+"use strict";
+promise_test(t => {
+  const scope = "resources/blank.html";
+  return service_worker_unregister_and_register(t, "resources/serviceworker-success.js", scope)
+  .then(reg => {
+    t.add_cleanup(() => service_worker_unregister(t, scope));
+    return wait_for_state(t, reg.installing, "activated");
+  })
+  .then(() => with_iframe(scope))
+  .then(iframe => {
+    t.add_cleanup(() => iframe.remove());
+    const sw = iframe.contentWindow.navigator.serviceWorker;
+    let state = "start in window";
+
+    return new Promise(resolve => {
+      sw.onmessage = t.step_func(e => {
+        if (e.data === "start in worker") {
+          assert_equals(state, "start in window");
+          state = "we are expecting a messageerror due to the worker sending us a SAB";
+          sw.controller.postMessage(state);
+        } else {
+          assert_unreached("Got an unexpected message from the service worker: " + e.data);
+        }
+      });
+
+      sw.onmessageerror = t.step_func(e => {
+        assert_equals(state, "we are expecting a messageerror due to the worker sending us a SAB");
+        assert_equals(e.data, null, "data");
+        assert_equals(e.origin, self.origin, "origin");
+        assert_not_equals(e.source, null, "source");
+        assert_equals(e.ports.length, 0, "ports length");
+        state = "done in window";
+        resolve();
+      });
+
+      sw.controller.postMessage(state);
+    });
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.headers b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.headers
new file mode 100644
index 00000000000..4fff9d9fba4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-serviceworker-success.https.html.headers
@@ -0,0 +1,2 @@
+Cross-Origin-Opener-Policy: same-origin
+Cross-Origin-Embedder-Policy: require-corp
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/lint.whitelist b/tests/wpt/web-platform-tests/lint.whitelist
index be6ae4f0314..48d7e9d6a74 100644
--- a/tests/wpt/web-platform-tests/lint.whitelist
+++ b/tests/wpt/web-platform-tests/lint.whitelist
@@ -282,6 +282,7 @@ GENERATE_TESTS: shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/w
 GENERATE_TESTS: shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/window-named-properties-003.html
 
 # Intentional use of setTimeout
+SET TIMEOUT: common/security-features/resources/common.sub.js
 SET TIMEOUT: css/css-fonts/font-display/font-display.html
 SET TIMEOUT: css/css-fonts/font-display/font-display-change.html
 SET TIMEOUT: css/css-fonts/font-display/font-display-change-ref.html
diff --git a/tests/wpt/web-platform-tests/trusted-types/idlharness.window.js b/tests/wpt/web-platform-tests/trusted-types/idlharness.tentative.window.js
similarity index 96%
rename from tests/wpt/web-platform-tests/trusted-types/idlharness.window.js
rename to tests/wpt/web-platform-tests/trusted-types/idlharness.tentative.window.js
index 7be9615ce67..5a854a12b78 100644
--- a/tests/wpt/web-platform-tests/trusted-types/idlharness.window.js
+++ b/tests/wpt/web-platform-tests/trusted-types/idlharness.tentative.window.js
@@ -12,6 +12,5 @@ idl_test(
         TrustedScript: ['window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string")'],
         TrustedScriptURL: ['window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string")'],
       });
-    },
-    'Trusted Types'
+    }
 );
diff --git a/tests/wpt/web-platform-tests/wasm/serialization/module/resources/serviceworker-success.js b/tests/wpt/web-platform-tests/wasm/serialization/module/resources/serviceworker-success.js
new file mode 100644
index 00000000000..89dd8a3831b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/wasm/serialization/module/resources/serviceworker-success.js
@@ -0,0 +1,19 @@
+"use strict";
+self.importScripts("/resources/testharness.js");
+self.importScripts("./create-empty-wasm-module.js");
+
+let state = "start in worker";
+
+self.onmessage = e => {
+  if (e.data === "start in window") {
+    assert_equals(state, "start in worker");
+    e.source.postMessage(state);
+    state = "waiting for message from the window";
+  } else if (e.data === "we are expecting a messageerror due to the worker sending us a WebAssembly.Module")  {
+    assert_equals(state, "waiting for message from the window");
+    e.source.postMessage(createEmptyWasmModule());
+    state = "done in worker";
+  } else {
+    e.source.postMessage(`worker onmessage was reached when in state "${state}" and data ${e.data}`);
+  }
+};
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/wasm/serialization/module/window-serviceworker-success.https.html b/tests/wpt/web-platform-tests/wasm/serialization/module/window-serviceworker-success.https.html
new file mode 100644
index 00000000000..a479b37e5e2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/wasm/serialization/module/window-serviceworker-success.https.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test ServiceWorkerContainer.onmessageerror using WebAssembly.Module</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
+<script src="./resources/create-empty-wasm-module.js"></script>
+
+<script>
+"use strict";
+promise_test(t => {
+  const scope = "resources/blank.html";
+  return service_worker_unregister_and_register(t, "resources/serviceworker-success.js", scope)
+  .then(reg => {
+    t.add_cleanup(() => service_worker_unregister(t, scope));
+    return wait_for_state(t, reg.installing, "activated");
+  })
+  .then(() => with_iframe(scope))
+  .then(iframe => {
+    t.add_cleanup(() => iframe.remove());
+    const sw = iframe.contentWindow.navigator.serviceWorker;
+    let state = "start in window";
+
+    return new Promise(resolve => {
+      sw.onmessage = t.step_func(e => {
+        if (e.data === "start in worker") {
+          assert_equals(state, "start in window");
+          state = "we are expecting a messageerror due to the worker sending us a WebAssembly.Module";
+          sw.controller.postMessage(state);
+        } else {
+          assert_unreached("Got an unexpected message from the service worker: " + e.data);
+        }
+      });
+
+      sw.onmessageerror = t.step_func(e => {
+        assert_equals(state, "we are expecting a messageerror due to the worker sending us a WebAssembly.Module");
+        assert_equals(e.data, null, "data");
+        assert_equals(e.origin, self.origin, "origin");
+        assert_not_equals(e.source, null, "source");
+        assert_equals(e.ports.length, 0, "ports length");
+        state = "done in window";
+        resolve();
+      });
+
+      sw.controller.postMessage(state);
+    });
+  });
+});
+</script>