diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-002.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-002.html.ini
new file mode 100644
index 00000000000..f64b45fea6b
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-002.html.ini
@@ -0,0 +1,4 @@
+[hit-test-floats-002.html]
+  [Hit test float]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini
new file mode 100644
index 00000000000..79eb41e58fb
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini
@@ -0,0 +1,4 @@
+[hittest-before-pseudo.html]
+  [Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-001.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-001.html.ini
deleted file mode 100644
index e38782d8c85..00000000000
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[elementFromPoint-001.html]
-  [CSSOM View - 5 - extensions to the Document interface]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
index c131078eace..23c61ede1a1 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
@@ -17,3 +17,6 @@
   [test the top of layer]
     expected: FAIL
 
+  [test some point of the element: top left corner]
+    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 a5195409b91..b46b01e499c 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
@@ -312,15 +312,27 @@
   [Response: combined response Content-Type: text/html;" \\" text/plain ";charset=GBK]
     expected: NOTRUN
 
-  [<iframe>: combined response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
+    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 a5b9b3752be..8d0261f22a0 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
@@ -53,6 +53,9 @@
   [combined text/javascript ]
     expected: FAIL
 
-  [separate text/javascript;charset=windows-1252  text/javascript]
+  [separate text/javascript x/x]
+    expected: FAIL
+
+  [separate text/javascript; charset=windows-1252 text/javascript]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
similarity index 71%
rename from tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
rename to tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
index dc2e45516de..385376c7321 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_5.html]
+[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/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 295031c1812..338d283eb0e 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_escaping-3.html]
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL
 
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 0407f0cc2b7..9eb581fcf1f 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: 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-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index 0fbc49ea1c1..f4f994c5d6f 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: 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/scripting-1/the-script-element/execution-timing/077.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/execution-timing/077.html.ini
new file mode 100644
index 00000000000..bcd2fd0eab8
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/execution-timing/077.html.ini
@@ -0,0 +1,4 @@
+[077.html]
+  [ adding several types of scripts through the DOM and removing some of them confuses scheduler ]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini
new file mode 100644
index 00000000000..a0f90ae10bd
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini
@@ -0,0 +1,4 @@
+[referrer-strict-policies.sub.html]
+  [The strict-* referrer policies compare the trustworthiness of a request's referrer string against its URL]
+    expected: FAIL
+
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/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
index 5ddb9bfeff6..a1effd5f801 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Sanity check: this all works as expected with no promises involved]
     expected: FAIL
@@ -16,5 +15,5 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/url/failure.html.ini b/tests/wpt/metadata-layout-2020/url/failure.html.ini
index a253a1e4e65..d49972a78db 100644
--- a/tests/wpt/metadata-layout-2020/url/failure.html.ini
+++ b/tests/wpt/metadata-layout-2020/url/failure.html.ini
@@ -143,3 +143,21 @@
   [Location's href: file://%C2%AD/p should throw]
     expected: FAIL
 
+  [XHR: \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [XHR: \\\\\\.\\Y: should throw]
+    expected: FAIL
+
+  [window.open(): \\\\\\.\\Y: should throw]
+    expected: FAIL
+
+  [window.open(): \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [Location's href: \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [Location's href: \\\\\\.\\Y: should throw]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 7fb55d4460c..801d3a0d464 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -113,6 +113,13 @@
        {}
       ]
      ],
+     "orthogonal-flex-item-crash.html": [
+      "056d6588835f6444234e75268c5550b057adfa13",
+      [
+       null,
+       {}
+      ]
+     ],
      "padding-overflow-crash.html": [
       "fd0c333fabadb073b9977a63de6a8c5c3ed79042",
       [
@@ -264,6 +271,13 @@
      ]
     },
     "css-scroll-anchoring": {
+     "fullscreen-crash.html": [
+      "545f2919b55ffe31f942e547d5299c00ee89d715",
+      [
+       null,
+       {}
+      ]
+     ],
      "table-collapsed-borders-crash.html": [
       "aa699317e2734fece3d662ad102fdd2772680e25",
       [
@@ -131413,6 +131427,19 @@
        {}
       ]
      ],
+     "align-items-008.html": [
+      "88aa10690bed3222ef81fec56d9ee94b55d74652",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "align-items-baseline-overflow-non-visible.html": [
       "3c91bc5553084018b2c16cbeb6721077c8db54e2",
       [
@@ -145626,7 +145653,7 @@
        ]
       ],
       "abs-pos-003.html": [
-       "c6b7d7b657ef89cd847388b9be28720d474329a9",
+       "8551a0109ed720f8d6a770d5967770e8d9188228",
        [
         null,
         [
@@ -146002,6 +146029,32 @@
         {}
        ]
       ],
+      "parent-repeat-auto-fit-001.html": [
+       "12010c32f29c67222861e8a3e1f2bc20e650af1a",
+       [
+        null,
+        [
+         [
+          "/css/css-grid/subgrid/parent-repeat-auto-fit-001-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "parent-repeat-auto-fit-002.html": [
+       "d46f59b99f557fb424ff0a7ab2a4962de23023c1",
+       [
+        null,
+        [
+         [
+          "/css/css-grid/subgrid/parent-repeat-auto-fit-002-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "repeat-auto-fill-001.html": [
        "9e57028c4cc2757eb3ec52cc214f902562413474",
        [
@@ -155983,6 +156036,19 @@
        {}
       ]
      ],
+     "text-overflow-ellipsis-editing-input.html": [
+      "b235ca503a80c42d2083ba78195d9b28e1307c22",
+      [
+       null,
+       [
+        [
+         "/css/css-overflow/text-overflow-ellipsis-editing-input-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "text-overflow-ellipsis-rtl-001.html": [
       "32284f89c2e5c4db774ba1a73fd3594f49606b06",
       [
@@ -163580,6 +163646,58 @@
         {}
        ]
       ],
+      "block-aspect-ratio-015.tentative.html": [
+       "3f9e833f1ece948d88ed2eeef5081a852687f3c6",
+       [
+        null,
+        [
+         [
+          "/css/reference/ref-filled-green-100px-square.xht",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "block-aspect-ratio-016.tentative.html": [
+       "7bd21e9196ed12605c0bb6f64110e3602a6245ad",
+       [
+        null,
+        [
+         [
+          "/css/reference/ref-filled-green-100px-square.xht",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "block-aspect-ratio-017.tentative.html": [
+       "4ea0d69a24f41a70790b4739e2ee8233927b6fe7",
+       [
+        null,
+        [
+         [
+          "/css/reference/ref-filled-green-100px-square.xht",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "block-aspect-ratio-018.tentative.html": [
+       "6c92b32c7b0fd45bace2d5bbf57c1f21c286682e",
+       [
+        null,
+        [
+         [
+          "/css/reference/ref-filled-green-100px-square.xht",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "flex-aspect-ratio-001.tentative.html": [
        "3b477e299ad763a1c0108e16f05981c76c25bb77",
        [
@@ -204471,6 +204589,19 @@
        {}
       ]
      ],
+     "text-orientation-initial.html": [
+      "434e14ccb88f8fde666c7ab646bf882a15bea294",
+      [
+       null,
+       [
+        [
+         "/css/css-writing-modes/text-orientation-initial-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "text-orientation-mixed-srl-016.xht": [
       "4fd928a8764f79255dcfbb295544535334a6d6e2",
       [
@@ -205368,6 +205499,19 @@
        {}
       ]
      ],
+     "writing-mode-initial.html": [
+      "2e7c9272855eff95e38aecb793d40162c4da1e21",
+      [
+       null,
+       [
+        [
+         "/css/css-writing-modes/writing-mode-initial-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "writing-mode-vertical-lr-002.xht": [
       "7e03cefd3c9208e3377c6b670ba37f1b7a7ce482",
       [
@@ -242535,7 +242679,7 @@
     []
    ],
    ".taskcluster.yml": [
-    "f83710377347b28877d29d3d1363f1cc1e1dff15",
+    "1716de40cf3b3ebf9691811f4bdd02049a4c05e2",
     []
    ],
    ".well-known": {
@@ -245541,6 +245685,10 @@
      "greenbox.png": [
       "6e555e3b197ce2f448f59d61e1488a0175490145",
       []
+     ],
+     "user-activation.js": [
+      "babd5b2cd32131a65d3eb81c4f5508fefff064cb",
+      []
      ]
     }
    },
@@ -296952,7 +297100,7 @@
        []
       ],
       "abs-pos-003-ref.html": [
-       "05e927399dd5ee78e14223fe33def32ceb49c5a9",
+       "19180106e548c8a183ba903b7b9c6f3e443d79a9",
        []
       ],
       "auto-track-sizing-001-ref.html": [
@@ -297059,6 +297207,14 @@
        "1de585bd6230172b9d43556c897d3270c78d9e82",
        []
       ],
+      "parent-repeat-auto-fit-001-ref.html": [
+       "2217497cd2bf1813ecb585564788b81488079b85",
+       []
+      ],
+      "parent-repeat-auto-fit-002-ref.html": [
+       "a884a12b991ad2a36e9ea1def1b9ff811a785a00",
+       []
+      ],
       "repeat-auto-fill-001-ref.html": [
        "8cd0ef66b974e808463b51db603476adee3b5f5d",
        []
@@ -299423,7 +299579,11 @@
        "c2c8914161af668cd57ce7ebac15b2100d93be8b",
        []
       ]
-     }
+     },
+     "text-overflow-ellipsis-editing-input-ref.html": [
+      "3902072bc58b7bf62290edafbce1b735288af716",
+      []
+     ]
     },
     "css-overscroll-behavior": {
      "META.yml": [
@@ -309992,6 +310152,10 @@
       "0010955e40522437cce426684b60e96c48f95414",
       []
      ],
+     "text-orientation-initial-ref.html": [
+      "322dde323ea8604c37d435f4d205e997a44e962f",
+      []
+     ],
      "text-orientation-mixed-srl-016-ref.xht": [
       "bae223a995da64c6a70d9d4e6a068685d7d018c8",
       []
@@ -310116,6 +310280,10 @@
       "d7ddfd553d60bbb98243eb32090b76f24fe38113",
       []
      ],
+     "writing-mode-initial-ref.html": [
+      "6f7b84fa72ad042924dedba39503ed6ea40bbd20",
+      []
+     ],
      "writing-mode-vertical-rl-003-ref.htm": [
       "19c334329711df0af4515614173ebd0ebe818f00",
       []
@@ -318610,7 +318778,7 @@
     "feature-policy-for-sandbox": {
      "resources": {
       "helper.js": [
-       "eec189871ff82d18c6e8a3cc86ccf9c08597ca42",
+       "4c553525300b998df74b9e5b273fa0a788dde8e4",
        []
       ],
       "opened_window.html": [
@@ -318618,7 +318786,7 @@
        []
       ],
       "opened_window.js": [
-       "189eb155cbcfb1bf7a0cbcc84971e01be5c0bf5a",
+       "d69c75cca00b9789511b2a94db054b89e5b69cb8",
        []
       ],
       "window_opener.html": [
@@ -318626,7 +318794,7 @@
        []
       ],
       "window_opener.js": [
-       "263a17b524b14fcf8576f61c901df7c0b6afdeca",
+       "6788c25f575b08f17ad35d4d22bfe642e04e9e63",
        []
       ]
      }
@@ -320185,7 +320353,7 @@
       []
      ],
      "operators.woff": [
-      "bb747e06ba609d64d9ef6a583d43df25c00a6941",
+      "5d7a588a9cd326d4d906d86c5b218942df27ce2d",
       []
      ],
      "radical-degreebottomraisepercent25-rulethickness1000.woff": [
@@ -330696,6 +330864,14 @@
           "3ae805d78d9ffbc265869f2403311006a37ddc10",
           []
          ],
+         "import-referrer-checker-insecure.sub.js": [
+          "2d6fd967120f5f1189c4ada726cbef7d7e537bae",
+          []
+         ],
+         "import-referrer-checker-insecure.sub.js.headers": [
+          "cb762eff806849df46dc758ef7b98b63f27f54c9",
+          []
+         ],
          "import-referrer-checker.sub.js": [
           "2c7dce9dffaf809887c8425b00d695019cde7064",
           []
@@ -333781,7 +333957,7 @@
         []
        ],
        "operator-dictionary-tests.js": [
-        "838a22c446b657fcb654d4a628037fb4204df97a",
+        "b92a852738ffbde90152791c0d67304064e2eafb",
         []
        ]
       }
@@ -334123,7 +334299,7 @@
       []
      ],
      "operator-dictionary.json": [
-      "2e9abe73b39f2c44765b7a351a6964d093313f6a",
+      "5dd0ab537243e89316644ec681446c5ff5a8c679",
       []
      ]
     },
@@ -343465,7 +343641,7 @@
       []
      ],
      "manifest.py": [
-      "f79edc8435293faed732243134ab0e4447f6b5d9",
+      "19d1bbed0334b938d765fda6738f409a9793b306",
       []
      ],
      "sourcefile.py": [
@@ -349181,7 +349357,7 @@
         []
        ],
        "executormarionette.py": [
-        "535923fdb5e9140f8b2c593557a50398f6532b47",
+        "2eaf25801df50276f2b02447d68a3fc98c5c377e",
         []
        ],
        "executoropera.py": [
@@ -349260,7 +349436,7 @@
        []
       ],
       "font.py": [
-       "daf0a1c1bfa221aa47981d93239021e4aefa74a9",
+       "6226fc66fedf2afc96b5110f3524b00d185cc538",
        []
       ],
       "formatters": {
@@ -349344,7 +349520,7 @@
        []
       ],
       "testloader.py": [
-       "cc9d1e539ac57c3dd5de355a66a59d2490c28351",
+       "3a26efc554211a5248a790909d99893afe9ff674",
        []
       ],
       "testrunner.py": [
@@ -349516,11 +349692,11 @@
        }
       },
       "wptrunner.py": [
-       "ce15c5fbbf0bdd3d1227612a4dac9f9e9c4c3f7c",
+       "d0cc19481dbdedc45edfee9608d82deb4a196571",
        []
       ],
       "wpttest.py": [
-       "27d7fbbbd7f41fd89261299986a18d5a4fdbb3ef",
+       "4b43b73610a591808aec938932eca228c08342bf",
        []
       ]
      },
@@ -349842,7 +350018,7 @@
        []
       ],
       "response.py": [
-       "f4009702f68ed06bdf863b6d701dd292cdb0259f",
+       "b6f274474519846d298a29da0b3db3961999b24f",
        []
       ],
       "router.py": [
@@ -350405,7 +350581,7 @@
       []
      ],
      "urltestdata.json": [
-      "b5b200e640c90d7f2887c1c0f4ac27c56ad7c6da",
+      "dd40eaa5a9f179d6904776e619d6e7f618b2ebf4",
       []
      ]
     }
@@ -372462,17 +372638,21 @@
      ]
     ],
     "async-platform-specific-write-read.tentative.https.html": [
-     "c1e8323f1186d628432ae5b983f0d9f81ba5f1ed",
+     "685b5a58a809f43e7c1379055743d5536258681c",
      [
       null,
-      {}
+      {
+       "testdriver": true
+      }
      ]
     ],
     "async-raw-write-read.tentative.https.html": [
-     "bd11a7f0f9a2a1f2e74d67f908d6ef2eaa2597f5",
+     "e6882b344f86de62af5c31f17719a4de6f94b2bb",
      [
       null,
-      {}
+      {
+       "testdriver": true
+      }
      ]
     ],
     "clipboard-events-synthetic.html": [
@@ -383074,6 +383254,13 @@
        ]
       ]
      },
+     "hittest-before-pseudo.html": [
+      "afba77e06dba12f229779cae6a4b6265d95461bd",
+      [
+       null,
+       {}
+      ]
+     ],
      "hittest-overlapping-margin.html": [
       "5c3601d96aeb42694c66aaff0845c1029474cda1",
       [
@@ -421571,16 +421758,14 @@
     },
     "feature-policy-for-sandbox": {
      "feature-propagation-to-auxiliary-context.html": [
-      "118ccac489c53e14b238f29cbdbd634793e7a611",
+      "86cdcb3b42702fe3d6dedfe13ddae348c3dd32e6",
       [
        null,
-       {
-        "timeout": "long"
-       }
+       {}
       ]
      ],
      "sandbox-policies-in-allow-attribute.html": [
-      "a29d43e5fccabedf376ec5cd28fe213d7902081e",
+      "c9e2d7119382882a663b3f25a0ba70b581ec9b5d",
       [
        null,
        {}
@@ -458642,6 +458827,13 @@
           {}
          ]
         ],
+        "referrer-strict-policies.sub.html": [
+         "1984d875b36668c0b8dbd53f24c50935af261fac",
+         [
+          null,
+          {}
+         ]
+        ],
         "referrer-unsafe-url.sub.html": [
          "443731c1b81375b737eeb9723a0c81d19ceab521",
          [
@@ -466288,66 +466480,282 @@
         {}
        ]
       ],
-      "operator-dictionary-001.html": [
-       "e4e5c68b26344195844699e531dceacc835a8597",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
-      "operator-dictionary-002.html": [
-       "ede3adc210cd5c091c7f56bb234e55d475ebf292",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
-      "operator-dictionary-003.html": [
-       "bb3c638e58f820fded8b0d75064a92ebad51e592",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
-      "operator-dictionary-004.html": [
-       "79bf523a787bfca3508fd078d528dc6346632224",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
-      "operator-dictionary-005.html": [
-       "4c1ee6dd74288596f4a1718988ab33255a3321e8",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
-      "operator-dictionary-006.html": [
-       "cdd3e1618b5c1c7e20276eaa5a54799d3029ca06",
-       [
-        null,
-        {
-         "timeout": "long"
-        }
-       ]
-      ],
       "operator-dictionary-combining.html": [
        "21befc92f01673ca7f3d4d2c007e9973d0f142e7",
        [
         null,
         {}
        ]
+      ],
+      "operator-dictionary-largeop-001.html": [
+       "8a5d2089ff933864ebb2847503739de460527697",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-largeop-002.html": [
+       "1650f01261f5c36f67aa6737f2941d80c9ca03cf",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-largeop-003.html": [
+       "96847592044e94bb50e4ccf5d9b87fd490e4e488",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-largeop-004.html": [
+       "08f5916b479b949a742ccd58e8678e3b37fceaf2",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-largeop-005.html": [
+       "9245fbcad9b63238b9bece34c7abf3a8660628b9",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-largeop-006.html": [
+       "b9d4b681b66f756ffbc60870d5e6d77254288d2e",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-001.html": [
+       "09698a15fc78433490a08f17b6857f4ab2dce8f1",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-002.html": [
+       "f3e9deb5afd3a980367f1e1eedf185ff0380a14c",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-003.html": [
+       "f4c5137b5f32c43d826ba9a618658381c74ca9c2",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-004.html": [
+       "9432c5dff0f6dd6aae88aa791f256fcfc8c4bf3d",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-005.html": [
+       "fbffb440182dcea78e657ce5a8907c3d0fb79435",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-movablelimits-006.html": [
+       "a6a6dfa0784fb2c98cbf728b01a229feab0e4824",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-001.html": [
+       "a7781fb3f78951037a66c3a4432bbf8efc133392",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-002.html": [
+       "5b524d9095aa66ab054c57441ea596f60edb1dad",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-003.html": [
+       "abd8736419bb277fc0bf4050e654bc007cb0c164",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-004.html": [
+       "09a1d8c8394fe5c54b7a60cee2e023437a78c525",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-005.html": [
+       "fc56326beb41d1f9e2415261eb060c02b66adb96",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-spacing-006.html": [
+       "2de9d66a0d383f3a77b55fe20935fe93ed33504f",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-001.html": [
+       "672a5d3f1b3f1ebd0af216f57f4831d66c231165",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-002.html": [
+       "bbf5b3e48a015dbfe217b74e9359ceed5408d1f4",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-003.html": [
+       "343ac09df3219b41218d85949af92e186e372ce1",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-004.html": [
+       "dd25c1121a5d88cfd9a12208f76736b19ea6cf9b",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-005.html": [
+       "4d716497436929d0268c806a906d57450e64335c",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-stretchy-006.html": [
+       "2088168b07240547d449845f152304825b6589a2",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-001.html": [
+       "14b72da2833c8bec19a6c0df053cd48000eb8e64",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-002.html": [
+       "9f18d893d6bcd870865ff14307ead2f00ac0e944",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-003.html": [
+       "73b4b07889eaee702c4defc601899224b6d749bf",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-004.html": [
+       "6bd20562bd71f49a28394ee7261a1024597c2cdd",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-005.html": [
+       "13f045fb95184d6ff873017cb1b01f9ddc962709",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
+      ],
+      "operator-dictionary-symmetric-006.html": [
+       "26267a76ab96f98a7d5f6283e664f420994a0c75",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
       ]
      },
      "radicals": {
@@ -474405,7 +474813,7 @@
      ]
     ],
     "pointerevent_capture_mouse.html": [
-     "32056f09cc1fade179f2528205920b61479b9783",
+     "bae2d14012fb20e2c6bf48ccbcb8f83d87110b83",
      [
       null,
       {
@@ -474681,7 +475089,7 @@
      ]
     ],
     "pointerevent_releasepointercapture_invalid_pointerid.html": [
-     "f51674cb4293a8f7d021a057abc9da16766cd625",
+     "71de19808992cc160dffaef54b1015edaf269569",
      [
       null,
       {
@@ -486558,6 +486966,13 @@
       }
      ]
     ],
+    "cross-origin-status-codes.html": [
+     "e8ece5ff2fea3d4d856cdf3774870c59080a1c45",
+     [
+      null,
+      {}
+     ]
+    ],
     "crossorigin-sandwich-TAO.sub.html": [
      "695bd654bb57d35edbcdf8409aaf9c09af9f620e",
      [
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
new file mode 100644
index 00000000000..f64b45fea6b
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
@@ -0,0 +1,4 @@
+[hit-test-floats-002.html]
+  [Hit test float]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini b/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
new file mode 100644
index 00000000000..79eb41e58fb
--- /dev/null
+++ b/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
@@ -0,0 +1,4 @@
+[hittest-before-pseudo.html]
+  [Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
deleted file mode 100644
index e38782d8c85..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[elementFromPoint-001.html]
-  [CSSOM View - 5 - extensions to the Document interface]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
index 85e94926cb3..5733d536fd3 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
@@ -21,3 +21,6 @@
   [test the top of layer]
     expected: FAIL
 
+  [test some point of the element: top left corner]
+    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
deleted file mode 100644
index e181af5397f..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[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 338b03e7fcf..08a0e7271d7 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,15 +312,27 @@
   [fetch(): separate response Content-Type: text/plain ]
     expected: NOTRUN
 
-  [<iframe>: combined response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
+    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 a5b9b3752be..8d0261f22a0 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,6 +53,9 @@
   [combined text/javascript ]
     expected: FAIL
 
-  [separate text/javascript;charset=windows-1252  text/javascript]
+  [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_5.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
similarity index 71%
rename from tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
rename to tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
index dc2e45516de..385376c7321 100644
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_5.html]
+[traverse_the_history_4.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 5f60c78e73c..f6a7aca3306 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,6 +1,5 @@
 [iframe_sandbox_popups_escaping-3.html]
   type: testharness
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL
 
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 d43f38b40cd..45d8be1c898 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: 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-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index 71edac2c5ed..e440b1e38c6 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: 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/execution-timing/077.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/execution-timing/077.html.ini
new file mode 100644
index 00000000000..bcd2fd0eab8
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/execution-timing/077.html.ini
@@ -0,0 +1,4 @@
+[077.html]
+  [ adding several types of scripts through the DOM and removing some of them confuses scheduler ]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini
new file mode 100644
index 00000000000..a0f90ae10bd
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html.ini
@@ -0,0 +1,4 @@
+[referrer-strict-policies.sub.html]
+  [The strict-* referrer policies compare the trustworthiness of a request's referrer string against its URL]
+    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/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
index 5ddb9bfeff6..a1effd5f801 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Sanity check: this all works as expected with no promises involved]
     expected: FAIL
@@ -16,5 +15,5 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/url/failure.html.ini b/tests/wpt/metadata/url/failure.html.ini
index 1cf097e8f6a..b9e60154b11 100644
--- a/tests/wpt/metadata/url/failure.html.ini
+++ b/tests/wpt/metadata/url/failure.html.ini
@@ -147,3 +147,21 @@
   [Location's href: file://%C2%AD/p should throw]
     expected: FAIL
 
+  [XHR: \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [XHR: \\\\\\.\\Y: should throw]
+    expected: FAIL
+
+  [window.open(): \\\\\\.\\Y: should throw]
+    expected: FAIL
+
+  [window.open(): \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [Location's href: \\\\\\.\\y: should throw]
+    expected: FAIL
+
+  [Location's href: \\\\\\.\\Y: should throw]
+    expected: FAIL
+
diff --git a/tests/wpt/web-platform-tests/.taskcluster.yml b/tests/wpt/web-platform-tests/.taskcluster.yml
index f8371037734..1716de40cf3 100644
--- a/tests/wpt/web-platform-tests/.taskcluster.yml
+++ b/tests/wpt/web-platform-tests/.taskcluster.yml
@@ -12,7 +12,7 @@ tasks:
       else:
         $if: 'tasks_for == "github-pull-request"'
         then:
-          $if: 'event.action in ["opened", "reopened", "synchronize", "ready_for_review"]  && !(event.pull_request.draft)'
+          $if: 'event.action in ["opened", "reopened", "synchronize"]'
           then: true
           else: false
         else: false
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-platform-specific-write-read.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-platform-specific-write-read.tentative.https.html
index c1e8323f118..685b5a58a80 100644
--- a/tests/wpt/web-platform-tests/clipboard-apis/async-platform-specific-write-read.tentative.https.html
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-platform-specific-write-read.tentative.https.html
@@ -2,8 +2,12 @@
 <meta charset="utf-8">
 <title>Async Clipboard raw platform-specific write -> read tests</title>
 <link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<body>Body needed for test_driver.click()</body>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/user-activation.js"></script>
 <script>
 'use strict';
 
@@ -11,6 +15,7 @@ async function rawWriteBeforeTest() {
   const format = 'RawClipboardDisabledFormat';
   const blob = new Blob(['RawClipboardDisabled'], {type: format});
   const clipboardItem = new ClipboardItem({[format]: blob}, {raw: true});
+  await waitForUserActivation();
   await navigator.clipboard.write([clipboardItem]);
 }
 
@@ -38,9 +43,11 @@ promise_test(async t => {
   assert_equals(blobInput.type, format.toLowerCase());
   const clipboardItemInput = new ClipboardItem(
       {[format]: blobInput}, {raw: true});
+  await waitForUserActivation();
   await navigator.clipboard.write([clipboardItemInput]);
 
   // Items should be readable on a raw clipboard after raw write.
+  await waitForUserActivation();
   const clipboardItems = await navigator.clipboard.read({raw: true});
   assert_equals(clipboardItems.length, 1);
   const clipboardItem = clipboardItems[0];
@@ -57,7 +64,6 @@ promise_test(async t => {
   // accessible as text.
   const textOutput = await navigator.clipboard.readText();
   assert_equals(textOutput, dataToWrite);
-
 }, 'Verify write and read clipboard given platform-specific raw input');
 </script>
 <p>
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-raw-write-read.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-raw-write-read.tentative.https.html
index bd11a7f0f9a..e6882b344f8 100644
--- a/tests/wpt/web-platform-tests/clipboard-apis/async-raw-write-read.tentative.https.html
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-raw-write-read.tentative.https.html
@@ -2,8 +2,12 @@
 <meta charset="utf-8">
 <title>Async Clipboard raw write -> Async Clipboard raw read test</title>
 <link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<body>Body needed for test_driver.click()</body>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/user-activation.js"></script>
 <script>
 'use strict';
 
@@ -16,6 +20,7 @@ promise_test(async t => {
   const blobInput2 = new Blob(['input data 2'], {type: format2});
   const clipboardItemInput = new ClipboardItem(
       {[format1]: blobInput1, [format2]: blobInput2}, {raw: true});
+  await waitForUserActivation();
   await navigator.clipboard.write([clipboardItemInput]);
 
   // Items may not be readable on the sanitized clipboard after raw write.
@@ -23,6 +28,7 @@ promise_test(async t => {
       navigator.clipboard.read({raw: false}));
 
   // Items should be readable on a raw clipboard after raw write.
+  await waitForUserActivation();
   const clipboardItems = await navigator.clipboard.read({raw: true});
   assert_equals(clipboardItems.length, 1);
   const clipboardItem = clipboardItems[0];
@@ -41,7 +47,6 @@ promise_test(async t => {
   assert_equals(data2, 'input data 2');
 
 }, 'Verify write and read clipboard given 2 platform-neutral raw inputs');
-
 </script>
 <p>
   Note: This is a manual test because it writes/reads to the shared system
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/resources/user-activation.js b/tests/wpt/web-platform-tests/clipboard-apis/resources/user-activation.js
new file mode 100644
index 00000000000..babd5b2cd32
--- /dev/null
+++ b/tests/wpt/web-platform-tests/clipboard-apis/resources/user-activation.js
@@ -0,0 +1,21 @@
+'use strict';
+
+// In order to use this function, please import testdriver.js and
+// testdriver-vendor.js, and include a <body> element.
+async function waitForUserActivation() {
+  const loadedPromise = new Promise(resolve => {
+    if(document.readyState == 'complete') {
+      resolve();
+      return;
+    }
+    window.addEventListener('load', resolve, {once: true});
+  });
+  await loadedPromise;
+
+  const clickedPromise = new Promise(resolve => {
+    document.body.addEventListener('click', resolve, {once: true});
+  });
+
+  test_driver.click(document.body);
+  await clickedPromise;
+}
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/align-items-008.html b/tests/wpt/web-platform-tests/css/css-flexbox/align-items-008.html
new file mode 100644
index 00000000000..88aa10690be
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/align-items-008.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
+<link rel="help" href="https://crbug.com/1081086" />
+<meta name="assert" content="Tests that certain dynamic changes don't lead to an incorrectly sized flex-item." />
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div id="target" style="display: flex; min-height: 200px;">
+  <div style="width: 100px; min-height: 100px; background: green;"></div>
+</div>
+<script>
+document.body.offsetTop;
+document.getElementById('target').style.alignItems = 'flex-start';
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/hittest-before-pseudo.html b/tests/wpt/web-platform-tests/css/css-flexbox/hittest-before-pseudo.html
new file mode 100644
index 00000000000..afba77e06db
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/hittest-before-pseudo.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<link rel="help" href="https://crbug.com/1081789" />
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+#target::before {
+  font: 50px/1 Ahem;
+  display: inline-flex;
+  content: "X";
+  border: 2px solid black;
+  color: green;
+}
+</style>
+<div id=target></div>
+<script>
+test(function(t) {
+  const target = document.getElementById('target');
+  assert_equals(target, document.elementFromPoint(30, 30));
+}, 'Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/orthogonal-flex-item-crash.html b/tests/wpt/web-platform-tests/css/css-flexbox/orthogonal-flex-item-crash.html
new file mode 100644
index 00000000000..056d6588835
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/orthogonal-flex-item-crash.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<link rel="help" href="https://crbug.com/1081086" />
+<meta name="assert" content="This test ensures that orthogonal flex and flex-items does not crash." />
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+<body style="width: 100px; height: 100px; font: 12px/1 Ahem;">
+  <div style="display: flex; writing-mode: vertical-rl;">
+    text text
+    <div style="min-height: 0; writing-mode: horizontal-tb;">
+      <span id="target"></span>
+      text
+    </div>
+  </div>
+</body>
+<script>
+document.body.offsetTop;
+const target = document.getElementById('target');
+target.parentElement.appendChild(target);
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003-ref.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003-ref.html
index 05e927399dd..19180106e54 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003-ref.html
@@ -56,6 +56,7 @@ a {
 <div class="grid"><div class="subgrid t1"></div></div>
 <div class="grid"><div class="subgrid t1"><x></x></div></div>
 <div class="grid"><div class="subgrid t1"><x></x><x></x></div></div>
+<div class="grid"><div class="subgrid t1"></div></div>
 <div class="grid a"><div class="subgrid t1"></div></div>
 <div class="grid a"><div class="subgrid t1"><x></x></div></div>
 <div class="grid a"><div class="subgrid t1"><x></x></div></div>
@@ -68,6 +69,7 @@ a {
 
 <div class="grid"><div class="subgrid t2"></div></div>
 <div class="grid"><div class="subgrid t2"><x></x></div></div>
+<div class="grid"><div class="subgrid t2"></div></div>
 <div class="grid"><div class="subgrid t2"><x></x><x></x></div></div>
 <div class="grid a"><div class="subgrid t2"></div></div>
 <div class="grid a"><div class="subgrid t2"><x></x></div></div>
@@ -81,6 +83,7 @@ a {
 
 <div class="grid"><div class="subgrid t3"></div></div>
 <div class="grid"><div class="subgrid t3"><x></x></div></div>
+<div class="grid"><div class="subgrid t3"></div></div>
 <div class="grid"><div class="subgrid t3"><x></x><x></x></div></div>
 <div class="grid a"><div class="subgrid t3"></div></div>
 <div class="grid a"><div class="subgrid t3"><x></x></div></div>
@@ -96,6 +99,7 @@ a {
 
 <div class="grid"><div class="subgrid t1"><a></a></div></div>
 <div class="grid"><div class="subgrid t1"><a></a><a></a></div></div>
+<div class="grid"><div class="subgrid t1"><a></a></div></div>
 <div class="grid a"><div class="subgrid t1"><a></a></div></div>
 <div class="grid a"><div class="subgrid t1"><a></a><a></a></div></div>
 <div class="grid c"><div class="subgrid t1"><a></a></div></div>
@@ -105,6 +109,7 @@ a {
 
 <div class="grid"><div class="subgrid t2"><a></a></div></div>
 <div class="grid"><div class="subgrid t2"><a></a><a></a></div></div>
+<div class="grid"><div class="subgrid t2"><a></a></div></div>
 <div class="grid a"><div class="subgrid t2"><a></a></div></div>
 <div class="grid a"><div class="subgrid t2"><a></a><a></a></div></div>
 <div class="grid c"><div class="subgrid t2"><a></a></div></div>
@@ -112,6 +117,7 @@ a {
 <div class="grid r"><div class="subgrid t2"><a></a></div></div>
 <div class="grid r"><div class="subgrid t2"><a></a><a></a></div></div>
 
+<div class="grid"><div class="subgrid t3"><a></a></div></div>
 <div class="grid"><div class="subgrid t3"><a></a></div></div>
 <div class="grid"><div class="subgrid t3"><a></a><a></a></div></div>
 <div class="grid a"><div class="subgrid t3"><a></a></div></div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003.html
index c6b7d7b657e..8551a0109ed 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/abs-pos-003.html
@@ -45,6 +45,12 @@ a {
   background: purple;
 }
 
+.o { overflow: hidden; }
+.abs {
+  grid-auto-rows: 3em;
+  grid-auto-columns: 3em;
+}
+.abs x { width:auto; height:auto; }
 </style>
 </head>
 <body>
@@ -52,6 +58,7 @@ a {
 <div class="grid"><div class="subgrid t1"></div></div>
 <div class="grid"><div class="subgrid t1"><x></x></div></div>
 <div class="grid"><div class="subgrid t1"><x></x><x></x></div></div>
+<div class="grid abs"><div class="subgrid t1 o"><x></x></div></div>
 <div class="grid a"><div class="subgrid t1"></div></div>
 <div class="grid a"><div class="subgrid t1"><x></x></div></div>
 <div class="grid a"><div class="subgrid t1"><x></x><x></x></div></div>
@@ -64,6 +71,7 @@ a {
 
 <div class="grid"><div class="subgrid t2"></div></div>
 <div class="grid"><div class="subgrid t2"><x></x></div></div>
+<div class="grid abs"><div class="subgrid t2 o"><x></x></div></div>
 <div class="grid"><div class="subgrid t2"><x></x><x></x></div></div>
 <div class="grid a"><div class="subgrid t2"></div></div>
 <div class="grid a"><div class="subgrid t2"><x></x></div></div>
@@ -77,6 +85,7 @@ a {
 
 <div class="grid"><div class="subgrid t3"></div></div>
 <div class="grid"><div class="subgrid t3"><x></x></div></div>
+<div class="grid abs"><div class="subgrid t3 o"><x></x></div></div>
 <div class="grid"><div class="subgrid t3"><x></x><x></x></div></div>
 <div class="grid a"><div class="subgrid t3"></div></div>
 <div class="grid a"><div class="subgrid t3"><x></x></div></div>
@@ -92,6 +101,7 @@ a {
 
 <div class="grid"><div class="subgrid t1"><a></a></div></div>
 <div class="grid"><div class="subgrid t1"><a></a><a></a></div></div>
+<div class="grid abs"><div class="subgrid t1 o"><a></a></div></div>
 <div class="grid a"><div class="subgrid t1"><a></a></div></div>
 <div class="grid a"><div class="subgrid t1"><a></a><a></a></div></div>
 <div class="grid c"><div class="subgrid t1"><a></a></div></div>
@@ -101,6 +111,7 @@ a {
 
 <div class="grid"><div class="subgrid t2"><a></a></div></div>
 <div class="grid"><div class="subgrid t2"><a></a><a></a></div></div>
+<div class="grid abs"><div class="subgrid t2 o"><a></a></div></div>
 <div class="grid a"><div class="subgrid t2"><a></a></div></div>
 <div class="grid a"><div class="subgrid t2"><a></a><a></a></div></div>
 <div class="grid c"><div class="subgrid t2"><a></a></div></div>
@@ -110,6 +121,7 @@ a {
 
 <div class="grid"><div class="subgrid t3"><a></a></div></div>
 <div class="grid"><div class="subgrid t3"><a></a><a></a></div></div>
+<div class="grid abs"><div class="subgrid t3 o"><a></a></div></div>
 <div class="grid a"><div class="subgrid t3"><a></a></div></div>
 <div class="grid a"><div class="subgrid t3"><a></a><a></a></div></div>
 <div class="grid c"><div class="subgrid t3"><a></a></div></div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001-ref.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001-ref.html
new file mode 100644
index 00000000000..2217497cd2b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001-ref.html
@@ -0,0 +1,436 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>Reference: subgrid inside a parent with repeat(auto-fit) columns</title>
+  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+  <style>
+html,body {
+  color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
+}
+
+.grid {
+  display: inline-grid;
+  width: 50px;
+  border: 1px solid;
+}
+
+.subgrid {
+  display: grid;
+  grid-template-columns: subgrid;
+  grid-column: 3 / span 4;
+  grid-auto-rows: 8px;
+  background: grey;
+}
+
+.fit-0a  { grid-template-columns: [y] 0px [z] 1px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-0b  { grid-template-columns: [x y] 0px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-0c  { grid-template-columns: [x] 1px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-0d  { grid-template-columns: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-0e  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px [z]; }
+.fit-0f  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px; }
+.fit-0g  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px [z] 1px [z]; }
+.fit-0h  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z] 1px [z]; }
+.fit-0i  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z]; }
+.fit-0j  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px; }
+.fit-0k  { grid-template-columns: [y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px; }
+.fit-0l  { grid-template-columns: [x y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px; }
+.fit-0m  { grid-template-columns: [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [y] 0px; }
+
+.fit-1a  { grid-template-columns: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-1b  { grid-template-columns: [x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-1c  { grid-template-columns: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-1d  { grid-template-columns: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-1e  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px; }
+
+.fit-2a  { grid-template-columns: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-2b  { grid-template-columns: [x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-2c  { grid-template-columns: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-2d  { grid-template-columns: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px; }
+
+.fit-3a  { grid-template-columns: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-3b  { grid-template-columns: [x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-3c  { grid-template-columns: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.fit-4a  { grid-template-columns: [y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-4b  { grid-template-columns: [x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.fit-5   { grid-template-columns: [y] 0px [y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.subgrid > :nth-child(2n)   {  background: black; }
+.subgrid > :nth-child(2n+1) {  background: pink; }
+
+  </style>
+</head>
+<body>
+
+<div class="grid fit-0a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0e"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0f"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0g"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0h"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0i"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0j"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0k"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0l"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0m"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1e"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-4a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-4b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-5"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001.html
new file mode 100644
index 00000000000..12010c32f29
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-001.html
@@ -0,0 +1,479 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>CSS Grid Test: subgrid inside a parent with repeat(auto-fit) columns</title>
+  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+  <link rel="help" href="https://drafts.csswg.org/css-grid-2/">
+  <link rel="match" href="parent-repeat-auto-fit-001-ref.html">
+  <style>
+html,body {
+  color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
+}
+
+.grid {
+  display: inline-grid;
+  width: 50px;
+  border: 1px solid;
+}
+
+.subgrid {
+  display: grid;
+  grid-template-columns: subgrid;
+  grid-column: 3 / span 4;
+  grid-auto-rows: 8px;
+  background: grey;
+}
+
+.fit-0a  { grid-template-columns: repeat(auto-fit, [y] 30px) [z] 1px [z] 1px [z] 1px [z] 1px [z] }
+.fit-0b  { grid-template-columns: [x] repeat(auto-fit, [y] 30px) [z] 1px [z] 1px [z] 1px [z] }
+.fit-0c  { grid-template-columns: [x] 1px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-0d  { grid-template-columns: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0e  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-0f  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+.fit-0g  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0h  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0i  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-0j  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+.fit-0k  { grid-template-columns: repeat(auto-fit, [y] 10px) repeat(100, [z] 10px) }
+.fit-0l  { grid-template-columns: [x] repeat(auto-fit, [y] 10px) repeat(100, [z] 10px) }
+.fit-0m  { grid-template-columns: repeat(100, [x] 10px) repeat(auto-fit, [y] 10px) }
+
+.fit-1a  { grid-template-columns: repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] 1px [z] }
+.fit-1b  { grid-template-columns: [x] repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-1c  { grid-template-columns: [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-1d  { grid-template-columns: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-1e  { grid-template-columns: [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-2a  { grid-template-columns: repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-2b  { grid-template-columns: [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-2c  { grid-template-columns: [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-2d  { grid-template-columns: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-3a  { grid-template-columns: repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-3b  { grid-template-columns: [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-3c  { grid-template-columns: [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-4a  { grid-template-columns: repeat(auto-fit, [y] 10px) [z] }
+.fit-4b  { grid-template-columns: [x] repeat(auto-fit, [y] 10px) }
+
+.fit-5   { grid-template-columns: repeat(auto-fit, [y] 10px) }
+
+.subgrid > :nth-child(2n)   {  background: black; }
+.subgrid > :nth-child(2n+1) {  background: pink; }
+
+  </style>
+</head>
+<body>
+
+<div class="grid fit-0a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0e"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0f"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0g"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0h"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0i"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0j"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0k"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0l"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-0m"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-1e"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-2d"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-3c"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-4a"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-4b"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<div class="grid fit-5"><div class="subgrid">
+  <div style="grid-column:y 5"></div>
+  <div style="grid-column:y 4"></div>
+  <div style="grid-column:y 3"></div>
+  <div style="grid-column:y 2"></div>
+  <div style="grid-column:y 1"></div>
+  <div style="grid-column:y -1"></div>
+  <div style="grid-column:y -2"></div>
+  <div style="grid-column:y -3"></div>
+  <div style="grid-column:y -4"></div>
+  <div style="grid-column:y -5"></div>
+</div></div>
+
+<script>
+  const expectedResults = [
+    "[y] 0px [z] 1px [z] 1px [z] 1px [z] 1px [z]",
+    "[x y] 0px [z] 1px [z] 1px [z] 1px [z]",
+    "[x] 1px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px",
+    "[y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px",
+    "[x y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px",
+    "[x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [y] 0px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [y] 10px",
+  ];
+  [...document.querySelectorAll('.grid')].forEach(function(grid, i) {
+    let actual = window.getComputedStyle(grid)['grid-template-columns'];
+    let expected = expectedResults[i];
+    if (actual != expected) {
+      let err = "Unexpected getComputedStyle value for grid " + i + " with className '" + grid.className + "':" +
+      " Actual: \"" + actual + "\", Expected: \"" + expected + "\"";
+      document.body.appendChild(document.createTextNode(err));
+    }
+  });
+</script>
+
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002-ref.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002-ref.html
new file mode 100644
index 00000000000..a884a12b991
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002-ref.html
@@ -0,0 +1,440 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>Reference: subgrid inside a parent with repeat(auto-fit) rows</title>
+  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+  <style>
+html,body {
+  color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
+}
+
+.grid {
+  display: inline-grid;
+  height: 50px;
+  width: 50px;
+  grid-template-columns: repeat(auto-fit, 10px);
+  border: 1px solid;
+  vertical-align: top;
+}
+
+.subgrid {
+  display: grid;
+  grid: subgrid / subgrid;
+  grid-column: 1 / -1;
+  grid-row: 3 / span 4;
+  grid-auto-columns: 8px;
+  background: grey;
+}
+
+.fit-0a  { grid-template-rows: [y] 0px [z] 1px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-0b  { grid-template-rows: [x y] 0px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-0c  { grid-template-rows: [x] 1px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-0d  { grid-template-rows: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-0e  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px [z]; }
+.fit-0f  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px; }
+.fit-0g  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px [z] 1px [z]; }
+.fit-0h  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z] 1px [z]; }
+.fit-0i  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z]; }
+.fit-0j  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px; }
+.fit-0k  { grid-template-rows: [y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px; }
+.fit-0l  { grid-template-rows: [x y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px; }
+.fit-0m  { grid-template-rows: [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [y] 0px; }
+
+.fit-1a  { grid-template-rows: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z] 1px [z]; }
+.fit-1b  { grid-template-rows: [x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-1c  { grid-template-rows: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-1d  { grid-template-rows: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-1e  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px; }
+
+.fit-2a  { grid-template-rows: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]; }
+.fit-2b  { grid-template-rows: [x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-2c  { grid-template-rows: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-2d  { grid-template-rows: [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px; }
+
+.fit-3a  { grid-template-rows: [y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]; }
+.fit-3b  { grid-template-rows: [x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-3c  { grid-template-rows: [x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.fit-4a  { grid-template-rows: [y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]; }
+.fit-4b  { grid-template-rows: [x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.fit-5   { grid-template-rows: [y] 0px [y] 0px [y] 10px [y] 10px [y] 10px; }
+
+.subgrid > :nth-child(2n)   {  background: black; }
+.subgrid > :nth-child(2n+1) {  background: pink; }
+
+  </style>
+</head>
+<body>
+
+<div class="grid fit-0a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0b"><div class="subgrid" style="grid-column-start:2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0c"><div class="subgrid" style="grid-column-start:3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0d"><div class="subgrid" style="grid-column-start:4">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0e"><div class="subgrid" style="grid-column-start:5">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0f"><div class="subgrid" style="grid-column-start:6">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0g"><div class="subgrid" style="grid-column-end:-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0h"><div class="subgrid" style="grid-column-end:-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0i"><div class="subgrid" style="grid-column-end:-4">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0j"><div class="subgrid" style="grid-column-end:-5">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0k"><div class="subgrid" style="grid-column-end:-6">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0l"><div class="subgrid" style="grid-column:2/-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0m"><div class="subgrid" style="grid-column:3/-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1a"><div class="subgrid" style="grid-column:2/-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1b"><div class="subgrid" style="grid-column:3/-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1d"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1e"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2d"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-4a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-4b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-5"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002.html
new file mode 100644
index 00000000000..d46f59b99f5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/parent-repeat-auto-fit-002.html
@@ -0,0 +1,483 @@
+<!DOCTYPE HTML>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<html><head>
+  <meta charset="utf-8">
+  <title>CSS Grid Test: subgrid inside a parent with repeat(auto-fit) rows</title>
+  <link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">
+  <link rel="help" href="https://drafts.csswg.org/css-grid-2/">
+  <link rel="match" href="parent-repeat-auto-fit-002-ref.html">
+  <style>
+html,body {
+  color:black; background-color:white; font:10px/1 monospace; padding:0; margin:0;
+}
+
+.grid {
+  display: inline-grid;
+  height: 50px;
+  width: 50px;
+  grid-template-columns: repeat(auto-fit, 10px);
+  border: 1px solid;
+  vertical-align: top;
+}
+
+.subgrid {
+  display: grid;
+  grid: subgrid / subgrid;
+  grid-column: 1 / -1;
+  grid-row: 3 / span 4;
+  grid-auto-columns: 8px;
+  background: grey;
+}
+
+.fit-0a  { grid-template-rows: repeat(auto-fit, [y] 30px) [z] 1px [z] 1px [z] 1px [z] 1px [z] }
+.fit-0b  { grid-template-rows: [x] repeat(auto-fit, [y] 30px) [z] 1px [z] 1px [z] 1px [z] }
+.fit-0c  { grid-template-rows: [x] 1px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-0d  { grid-template-rows: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0e  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-0f  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+.fit-0g  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0h  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-0i  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-0j  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+.fit-0k  { grid-template-rows: repeat(auto-fit, [y] 10px) repeat(100, [z] 10px) }
+.fit-0l  { grid-template-rows: [x] repeat(auto-fit, [y] 10px) repeat(100, [z] 10px) }
+.fit-0m  { grid-template-rows: repeat(100, [x] 10px) repeat(auto-fit, [y] 10px) }
+
+.fit-1a  { grid-template-rows: repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] 1px [z] }
+.fit-1b  { grid-template-rows: [x] repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-1c  { grid-template-rows: [x] 2px [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-1d  { grid-template-rows: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-1e  { grid-template-rows: [x] 2px [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-2a  { grid-template-rows: repeat(auto-fit, [y] 10px) [z] 1px [z] 1px [z] }
+.fit-2b  { grid-template-rows: [x] repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-2c  { grid-template-rows: [x] 2px [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-2d  { grid-template-rows: [x] 2px [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-3a  { grid-template-rows: repeat(auto-fit, [y] 10px) [z] 1px [z] }
+.fit-3b  { grid-template-rows: [x] repeat(auto-fit, [y] 10px) [z] }
+.fit-3c  { grid-template-rows: [x] 2px [x] repeat(auto-fit, [y] 10px) }
+
+.fit-4a  { grid-template-rows: repeat(auto-fit, [y] 10px) [z] }
+.fit-4b  { grid-template-rows: [x] repeat(auto-fit, [y] 10px) }
+
+.fit-5   { grid-template-rows: repeat(auto-fit, [y] 10px) }
+
+.subgrid > :nth-child(2n)   {  background: black; }
+.subgrid > :nth-child(2n+1) {  background: pink; }
+
+  </style>
+</head>
+<body>
+
+<div class="grid fit-0a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0b"><div class="subgrid" style="grid-column-start:2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0c"><div class="subgrid" style="grid-column-start:3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0d"><div class="subgrid" style="grid-column-start:4">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0e"><div class="subgrid" style="grid-column-start:5">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0f"><div class="subgrid" style="grid-column-start:6">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0g"><div class="subgrid" style="grid-column-end:-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0h"><div class="subgrid" style="grid-column-end:-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0i"><div class="subgrid" style="grid-column-end:-4">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0j"><div class="subgrid" style="grid-column-end:-5">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0k"><div class="subgrid" style="grid-column-end:-6">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0l"><div class="subgrid" style="grid-column:2/-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-0m"><div class="subgrid" style="grid-column:3/-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1a"><div class="subgrid" style="grid-column:2/-3">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1b"><div class="subgrid" style="grid-column:3/-2">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1d"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-1e"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-2d"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-3c"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-4a"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-4b"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<div class="grid fit-5"><div class="subgrid">
+  <div style="grid-row:y 5"></div>
+  <div style="grid-row:y 4"></div>
+  <div style="grid-row:y 3"></div>
+  <div style="grid-row:y 2"></div>
+  <div style="grid-row:y 1"></div>
+  <div style="grid-row:y -1"></div>
+  <div style="grid-row:y -2"></div>
+  <div style="grid-row:y -3"></div>
+  <div style="grid-row:y -4"></div>
+  <div style="grid-row:y -5"></div>
+</div></div>
+
+<script>
+  const expectedResults = [
+    "[y] 0px [z] 1px [z] 1px [z] 1px [z] 1px [z]",
+    "[x y] 0px [z] 1px [z] 1px [z] 1px [z]",
+    "[x] 1px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 0px [y] 0px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z] 1px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px [z]",
+    "[x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x] 2px [x y] 0px [y] 0px [y] 0px",
+    "[y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px",
+    "[x y] 0px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px [z] 10px",
+    "[x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [x] 10px [y] 0px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 0px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x] 2px [x y] 10px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [z] 1px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x] 2px [x y] 0px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [y] 10px [z]",
+    "[x y] 0px [y] 0px [y] 10px [y] 10px [y] 10px",
+    "[y] 0px [y] 0px [y] 10px [y] 10px [y] 10px",
+  ];
+  [...document.querySelectorAll('.grid')].forEach(function(grid, i) {
+    let actual = window.getComputedStyle(grid)['grid-template-rows'];
+    let expected = expectedResults[i];
+    if (actual != expected) {
+      let err = "Unexpected getComputedStyle value for grid " + i + " with className '" + grid.className + "':" +
+      " Actual: \"" + actual + "\", Expected: \"" + expected + "\"";
+      document.body.appendChild(document.createTextNode(err));
+    }
+  });
+</script>
+
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input-ref.html b/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input-ref.html
new file mode 100644
index 00000000000..3902072bc58
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input-ref.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<title>CSS Test Reference</title>
+<style>
+  input {
+    all: initial;
+    width: 100px;
+  }
+</style>
+<p>You should not see an ellipsis for the text below.</p>
+<input id="input_element" value="xxxxxxxxxxxxxxxxxxxx">
diff --git a/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input.html b/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input.html
new file mode 100644
index 00000000000..b235ca503a8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-overflow/text-overflow-ellipsis-editing-input.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<title>CSS Overflow Test: text-overflow:ellipsis not rendered while editing</title>
+<link rel="help" href="https://drafts.csswg.org/css-overflow/#ellipsis-interaction">
+<link rel="match" href="text-overflow-ellipsis-editing-input-ref.html">
+<!-- The specification says it "may" render ellipsis as clip while editing, but
+     all current engines do for input elements. -->
+<style>
+  input {
+    all: initial;
+    width: 100px;
+    text-overflow: ellipsis;
+    caret-color: transparent;
+  }
+</style>
+<p>You should not see an ellipsis for the text below.</p>
+<input id="input_element" value="xxxxxxxxxxxxxxxxxxxx">
+<script>
+  input_element.offsetTop;
+  input_element.focus();
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-scroll-anchoring/fullscreen-crash.html b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/fullscreen-crash.html
new file mode 100644
index 00000000000..545f2919b55
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/fullscreen-crash.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html class="test-wait">
+<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=823150">
+
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<style>
+
+#a { height: 700px; }
+#b { border: 4px solid #ccc; }
+
+</style>
+<div id="a"><div id="b"></div></div>
+<script>
+
+onload = () => {
+  test_driver.bless("requestFullscreen", step2);
+};
+step2 = () => {
+  b.requestFullscreen();
+  b.addEventListener('fullscreenchange', step3);
+};
+step3 = () => {
+  document.designMode = "on";
+  document.execCommand("selectAll");
+  document.execCommand("formatBlock", false, "p");
+  document.documentElement.classList.remove('test-wait');
+};
+
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-015.tentative.html b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-015.tentative.html
new file mode 100644
index 00000000000..3f9e833f1ec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-015.tentative.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<title>CSS aspect-ratio: div inline size + min-width: auto</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht" />
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+
+<div style="background: green; height: 100px; aspect-ratio: 1/2;">
+  <div style="width: 100px;"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-016.tentative.html b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-016.tentative.html
new file mode 100644
index 00000000000..7bd21e9196e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-016.tentative.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<title>CSS aspect-ratio: div inline size + min-width: auto</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht" />
+<meta name="assert" content="With min-width: auto and content smaller than the aspect ratio size, we should still size per aspect-ratio">
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+
+<div style="background: green; height: 100px; aspect-ratio: 1/1;">
+  <div style="width: 50px"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-017.tentative.html b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-017.tentative.html
new file mode 100644
index 00000000000..4ea0d69a24f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-017.tentative.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<title>CSS aspect-ratio: div inline size + min-width: auto</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht" />
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+
+<div style="writing-mode: vertical-lr; background: green; width: 100px; aspect-ratio: 2/1;">
+  <div style="height: 100px"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-018.tentative.html b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-018.tentative.html
new file mode 100644
index 00000000000..6c92b32c7b0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/aspect-ratio/block-aspect-ratio-018.tentative.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<title>CSS aspect-ratio: div inline size + min-width: auto</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht" />
+<meta name="assert" content="Setting overflow to non-visible/clip should not apply min-width: auto">
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+
+<div style="background: green; height: 100px; aspect-ratio: 1/1; overflow: hidden;">
+  <div style="width: 100px; display: inline-block;"></div>
+  <div style="width: 500px; display: inline-block; background: red;"></div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial-ref.html b/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial-ref.html
new file mode 100644
index 00000000000..322dde323ea
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial-ref.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<div style="writing-mode:vertical-rl">
+  <div>
+    vertical
+  </div>
+</div>
+
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial.html b/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial.html
new file mode 100644
index 00000000000..434e14ccb88
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/text-orientation-initial.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<link rel=help href="https://drafts.csswg.org/css-writing-modes-4/#text-orientation">
+<link rel=help href="https://crbug.com/1081659">
+<link rel="match" href="text-orientation-initial-ref.html">
+<div style="writing-mode:vertical-rl;text-orientation:upright">
+  <div style="text-orientation:initial">
+    vertical
+  </div>
+</div>
+
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial-ref.html b/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial-ref.html
new file mode 100644
index 00000000000..6f7b84fa72a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial-ref.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<div>
+  <div>
+    horizontal
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial.html b/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial.html
new file mode 100644
index 00000000000..2e7c9272855
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/writing-mode-initial.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<link rel=help href="https://drafts.csswg.org/css-writing-modes-4/#block-flow">
+<link rel=help href="https://crbug.com/1081659">
+<link rel="match" href="writing-mode-initial-ref.html">
+<div style="writing-mode:vertical-rl">
+  <div style="writing-mode:initial">
+    horizontal
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/feature-propagation-to-auxiliary-context.html b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/feature-propagation-to-auxiliary-context.html
index 118ccac489c..86cdcb3b427 100644
--- a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/feature-propagation-to-auxiliary-context.html
+++ b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/feature-propagation-to-auxiliary-context.html
@@ -1,6 +1,5 @@
 <!DOCTYPE html>
 <head>
-<meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 </head>
@@ -16,48 +15,57 @@ const iframe_src = "/feature-policy/feature-policy-for-sandbox/resources/window_
 const window_url_main = "/feature-policy/feature-policy-for-sandbox/resources/opened_window.html";
 
 promise_test( async () => {
-    for (const feature of features_that_propagate) {
-     const iframe = await add_iframe(
-        {src: iframe_src, allow: `${feature} 'none'`});
-    iframe.contentWindow.postMessage({type: "feature", feature: feature}, "*");
-    const iframe_state = await feature_update(feature);
-    assert_false(iframe_state, `'${feature}' is not disabled in <iframe>.'`);
-    iframe.contentWindow.postMessage({
-        type: "open_window",
-        url: `${window_url_main}?${feature}`
-    }, "*");
-    const window_state = await feature_update(feature);
-    assert_false(window_state,
-                 `'${feature}' is not disabled in new window.`);
-    const did_close = await close_aux_window(iframe);
-    assert_true(did_close);
-    iframe.parentElement.removeChild(iframe);
-  }
+  const iframe = await add_iframe({
+    src: iframe_src,
+    allow: features_that_propagate.map(feature => `${feature} 'none'`).join(", ")
+  });
+
+  iframe.contentWindow.postMessage(
+    {type: "features", features: features_that_propagate}, "*");
+  const iframe_states = await feature_update();
+  for (const [feature, state] of iframe_states)
+    assert_false(state, `'${feature}' is not disabled in <iframe>.'`);
+
+  iframe.contentWindow.postMessage({
+      type: "open_window",
+      url: `${window_url_main}?${features_that_propagate.join("&")}`
+  }, "*");
+  const window_states = await feature_update();
+  for (const [feature, state] of iframe_states)
+    assert_false(state, `'${feature}' is not disabled in new window.`);
+
+  const did_close = await close_aux_window(iframe);
+  assert_true(did_close);
+  iframe.parentElement.removeChild(iframe);
 }, "Verify feature policies are inherited by the auxiliary browsing context " +
    "if opened from a non-sandboxed same-origin <iframe>.");
 
-promise_test( async() => {
-  for (const feature of features_that_propagate) {
-    const iframe = await add_iframe({
-        src: iframe_src,
-        allow: `${feature} 'none'`,
-        sandbox: "allow-scripts allow-popups allow-popups-to-escape-sandbox"});
-    iframe.contentWindow.postMessage({type: "feature", feature: feature}, "*");
-    const iframe_state = await feature_update(feature);
-    assert_false(iframe_state,
-                 `'${feature}' is not disabled in <iframe>.'`);
-    iframe.contentWindow.postMessage({
-        type: "open_window",
-        url: `${window_url_main}?${feature}`
-    }, "*");
-    const window_state = await feature_update(feature);
-    assert_true(window_state, `'${feature}' is disabled.`);
-    const did_close = await close_aux_window(iframe);
-    assert_true(did_close);
-    iframe.parentElement.removeChild(iframe);
-  }
+promise_test( async () => {
+  const iframe = await add_iframe({
+    src: iframe_src,
+    allow: features_that_propagate.map(feature => `${feature} 'none'`).join(", "),
+    sandbox: "allow-scripts allow-popups allow-popups-to-escape-sandbox"
+  });
+
+  iframe.contentWindow.postMessage(
+    {type: "features", features: features_that_propagate}, "*");
+  const iframe_states = await feature_update();
+  for (const [feature, state] of iframe_states)
+    assert_false(state, `'${feature}' is not disabled in <iframe>.'`);
+
+  iframe.contentWindow.postMessage({
+      type: "open_window",
+      url: `${window_url_main}?${features_that_propagate.join("&")}`
+  }, "*");
+  const window_states = await feature_update();
+  for (const [feature, state] of window_states)
+    assert_true(state, `'${feature}' is disabled in new window.`);
+
+  const did_close = await close_aux_window(iframe);
+  assert_true(did_close);
+  iframe.parentElement.removeChild(iframe);
 }, "Verify feature policies are NOT inherited by the auxiliary browsing " +
-   "context if opened from a sandboxed same-origin <iframe> which allows " +
-   "popups to escape sandbox.");
+  "context if opened from a sandboxed same-origin <iframe> which allows " +
+  "popups to escape sandbox.");
 </script>
-</body>
\ No newline at end of file
+</body>
diff --git a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/helper.js b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/helper.js
index eec189871ff..4c553525300 100644
--- a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/helper.js
+++ b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/helper.js
@@ -52,29 +52,30 @@ function wait_for_raf_count(c) {
 }
 
 // Returns a promise which is resolved with the next/already received message
-// with feature update for |feature|. The resolved value is the state of the
-// feature |feature|. If |optional_timeout| is provided, after the given delay
+// with features update for |features|. The resolved value is the state of the
+// features |features|. If |optional_timeout| is provided, after the given delay
 // (in terms of rafs) the promise is resolved with false.
-function feature_update(feature, optional_timeout_rafs) {
+function feature_update(optional_timeout_rafs) {
   function reset_for_next_update() {
     return new Promise((r) => {
-      const state = last_feature_message.state;
+      const states = last_feature_message.states;
       last_feature_message = null;
-      r(state);
+      r(states);
     });
   }
-  if (last_feature_message && last_feature_message.feature === feature)
+
+  if (last_feature_message)
     return reset_for_next_update();
 
   if (optional_timeout_rafs) {
     wait_for_raf_count(optional_timeout_rafs).then (() => {
-      last_feature_message = {state: false};
+      last_feature_message = {states: []};
       on_new_feature_callback();
     });
   }
 
   return new Promise((r) => on_new_feature_callback = r)
-            .then(() => reset_for_next_update());
+            .then(reset_for_next_update);
 }
 
 function close_aux_window(iframe) {
@@ -88,7 +89,7 @@ function on_message(e) {
   var msg = e.data;
   assert_true("type" in msg);
   switch (msg.type) {
-    case "feature":
+    case "features":
       on_feature_msg(msg);
       break;
     case "close_window":
@@ -98,9 +99,8 @@ function on_message(e) {
 }
 
 function on_feature_msg(msg) {
-  assert_true("feature" in msg);
-  assert_true("state" in msg);
-  last_feature_message = msg
+  assert_true("states" in msg);
+  last_feature_message = msg;
   if (on_new_feature_callback) {
     on_new_feature_callback();
     on_new_feature_callback = null;
diff --git a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/opened_window.js b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/opened_window.js
index 189eb155cbc..d69c75cca00 100644
--- a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/opened_window.js
+++ b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/opened_window.js
@@ -1,7 +1,9 @@
-var feature = window.location.search.substr(1);
-var state = document.featurePolicy.allowsFeature(feature);
+const features = window.location.search.substr(1).split("&");
+const states = features
+  .map(feature => [feature, document.featurePolicy.allowsFeature(feature)]);
+
 // TODO(ekaramad): We might at some point choose a different propagation
 // strategy with rel=noopener. This test should adapt accordingly (perhaps use
 // broadcast channels).
 window.opener.parent.postMessage(
-    {type: "feature", feature: feature, state: state}, "*");
+    {type: "features", states: states}, "*");
diff --git a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/window_opener.js b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/window_opener.js
index 263a17b524b..6788c25f575 100644
--- a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/window_opener.js
+++ b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/resources/window_opener.js
@@ -2,12 +2,13 @@ var auxiliary_context = null;
 window.addEventListener("message", (e) => {
   var msg = e.data;
   switch (msg.type) {
-    case "feature":
-      var state = document.featurePolicy.allowsFeature(msg.feature);
+    case "features":
       e.source.postMessage({
-          type: "feature",
-          feature: msg.feature,
-          state: state}, "*");
+        type: "features",
+        states:
+          msg.features
+          .map(feature => [feature, document.featurePolicy.allowsFeature(feature)])
+      }, "*");
       break;
     case "open_window":
       auxiliary_context = window.open(msg.url);
diff --git a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/sandbox-policies-in-allow-attribute.html b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/sandbox-policies-in-allow-attribute.html
index a29d43e5fcc..c9e2d711938 100644
--- a/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/sandbox-policies-in-allow-attribute.html
+++ b/tests/wpt/web-platform-tests/feature-policy/feature-policy-for-sandbox/sandbox-policies-in-allow-attribute.html
@@ -12,35 +12,53 @@
 const iframe_src = "/feature-policy/feature-policy-for-sandbox/resources/window_opener.html";
 
 promise_test( async () => {
-  for (const feature of sandbox_features) {
-    // For the test to work correctly we need "scripts";
-    const sandbox_flags = feature === "scripts" ? "" : "allow-scripts";
-    const iframe = await add_iframe(
-        {src: iframe_src, allow: `${feature} *`, sandbox: sandbox_flags});
-    iframe.contentWindow.postMessage({type: "feature", feature: feature}, "*");
-    const iframe_state = await feature_update(feature);
-    assert_true(iframe_state,
-                `'${feature}' should not be disabled in <iframe>.'`);
-    iframe.parentElement.removeChild(iframe);
-  }
+  const iframe = await add_iframe({
+    src: iframe_src,
+    allow: sandbox_features.map(feature => `${feature} *`).join(", "),
+    sandbox: ""
+  });
+
+  iframe.contentWindow.postMessage({type: "features", features: sandbox_features}, "*");
+  const iframe_states = await feature_update();
+  for (const [feature, state] of iframe_states)
+    assert_true(state, `'${feature}' should not be disabled in <iframe>.'`);
+
+  iframe.parentElement.removeChild(iframe);
 }, "Verify that when a sandbox related feature is enabled in 'allow' then " +
    " the feature will be enabled regardless of sandbox attribute's value.");
 
-promise_test( async() => {
-  for (const feature of sandbox_features) {
-    const sandbox_flags = `allow-${feature} allow-scripts`;
-    const iframe = await add_iframe(
-        {src: iframe_src, allow: `${feature} 'none'`, sandbox: sandbox_flags});
-    iframe.contentWindow.postMessage({type: "feature", feature: feature}, "*");
-    // 'scripts' will block running code in the subframe and no update can be
-    // sent. A timeout determines the feature is disabled.
-    const timeout = (feature === "scripts") ? 10 : false;
-    const iframe_state = await feature_update(feature, timeout);
-    assert_false(iframe_state,
-                `'${feature}' should be disabled in <iframe>.'`);
-    iframe.parentElement.removeChild(iframe);
-  }
-}, "Verify that when a sandbox related feature is disabled in 'allow' then " +
+promise_test( async () => {
+  const non_script_sandbox_features =
+    sandbox_features.filter(feature => feature !== "scripts");
+  const sandbox_flags =
+    sandbox_features.map(feature => `allow-${feature}`).join(" ");
+  const allow_attribute =
+    non_script_sandbox_features.map(feature => `${feature} 'none'`).join(", ");
+
+  const iframe = await add_iframe(
+      {src: iframe_src, allow: allow_attribute, sandbox: sandbox_flags});
+
+  iframe.contentWindow.postMessage(
+    {type: "features", features: non_script_sandbox_features}, "*");
+  const iframe_states = await feature_update();
+  for (const [feature, state] of iframe_states)
+    assert_false(state, `'${feature}' should be disabled in <iframe>.'`);
+
+  iframe.parentElement.removeChild(iframe);
+}, "Verify that when a sandbox related feature (except scripts) is disabled in 'allow' then " +
    " the feature will be disabled regardless of sandbox attribute's value.");
+
+promise_test( async () => {
+  const iframe = await add_iframe(
+    {src: iframe_src, allow: "scripts 'none'", sandbox: "allow-scripts"});
+
+  iframe.contentWindow.postMessage(
+    {type: "features", features: ['scripts']}, "*");
+  const iframe_states = await feature_update(10);
+
+  assert_equals(iframe_states.length, 0);
+  iframe.parentElement.removeChild(iframe);
+}, "Verify that when scripts is disabled in 'allow' then " +
+  " the feature will be disabled regardless of sandbox attribute's value.");
 </script>
-</body>
\ No newline at end of file
+</body>
diff --git a/tests/wpt/web-platform-tests/fonts/math/operators.woff b/tests/wpt/web-platform-tests/fonts/math/operators.woff
index bb747e06ba6..5d7a588a9cd 100644
Binary files a/tests/wpt/web-platform-tests/fonts/math/operators.woff and b/tests/wpt/web-platform-tests/fonts/math/operators.woff differ
diff --git a/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html
new file mode 100644
index 00000000000..1984d875b36
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/referrer-strict-policies.sub.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Referrer with the strict-origin referrer policy</title>
+<meta name="referrer" content="strict-origin">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<script type="module">
+
+// "name" parameter is necessary for bypassing the module map in descendant import.
+
+import { referrer as insecureImport } from "./resources/import-referrer-checker-insecure.sub.js?name=insecure_import";
+import { referrer as secureImport } from "https://{{domains[www]}}:{{ports[https][0]}}/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js?name=secure_import";
+
+const origin = (new URL(location.href)).origin + "/";
+
+test(t => {
+  assert_equals(
+      insecureImport, origin,
+      "A document with the strict-origin referrer policy served over HTTP, " +
+      "imports an module script over HTTP, that imports a descendant script " +
+      "over HTTP. The request for the descendant script is sent with a " +
+      "`Referer` header with the page's origin");
+
+  assert_equals(
+      secureImport, "",
+      "A document with the strict-origin referrer policy served over HTTP, " +
+      "imports an module script over HTTPS, that imports a descendant script " +
+      "over HTTP. The request for the descendant script is sent with no " +
+      "`Referer` header");
+}, "The strict-* referrer policies compare the trustworthiness of a " +
+   "request's referrer string against its URL");
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js
new file mode 100644
index 00000000000..2d6fd967120
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js
@@ -0,0 +1 @@
+export { referrer } from 'http://{{host}}:{{ports[http][0]}}/html/semantics/scripting-1/the-script-element/module/resources/referrer-checker.py?name={{GET[name]}}';
diff --git a/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js.headers b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js.headers
new file mode 100644
index 00000000000..cb762eff806
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/scripting-1/the-script-element/module/resources/import-referrer-checker-insecure.sub.js.headers
@@ -0,0 +1 @@
+Access-Control-Allow-Origin: *
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-001.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-005.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-001.html
index 4c1ee6dd742..8a5d2089ff9 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-005.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-001.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "symmetric");
+      OperatorDictionaryTests.run(json, "largeop", 0);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-002.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-006.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-002.html
index cdd3e1618b5..1650f01261f 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-006.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-002.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "accent");
+      OperatorDictionaryTests.run(json, "largeop", 1);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-003.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-003.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-003.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-003.html
index bb3c638e58f..96847592044 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-003.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-003.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "largeop");
+      OperatorDictionaryTests.run(json, "largeop", 2);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-004.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-004.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-004.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-004.html
index 79bf523a787..08f5916b479 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-004.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-004.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "stretchy");
+      OperatorDictionaryTests.run(json, "largeop", 3);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-005.html
new file mode 100644
index 00000000000..9245fbcad9b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-005.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "largeop", 4);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-006.html
new file mode 100644
index 00000000000..b9d4b681b66
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-largeop-006.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "largeop", 5);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-001.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-001.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-001.html
index e4e5c68b263..09698a15fc7 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-001.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-001.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "lspace/rspace");
+      OperatorDictionaryTests.run(json, "movablelimits", 0);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-002.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-002.html
similarity index 95%
rename from tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-002.html
rename to tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-002.html
index ede3adc210c..f3e9deb5afd 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-002.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-002.html
@@ -20,7 +20,7 @@
   window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
   async function runTests() {
       let json = await fetchOperatorDictionary();
-      OperatorDictionaryTests.run(json, "movablelimits");
+      OperatorDictionaryTests.run(json, "movablelimits", 1);
       done();
   }
 </script>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-003.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-003.html
new file mode 100644
index 00000000000..f4c5137b5f3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-003.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "movablelimits", 2);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-004.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-004.html
new file mode 100644
index 00000000000..9432c5dff0f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-004.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "movablelimits", 3);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-005.html
new file mode 100644
index 00000000000..fbffb440182
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-005.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "movablelimits", 4);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-006.html
new file mode 100644
index 00000000000..a6a6dfa0784
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-movablelimits-006.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "movablelimits", 5);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-001.html
new file mode 100644
index 00000000000..a7781fb3f78
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-001.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 0);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-002.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-002.html
new file mode 100644
index 00000000000..5b524d9095a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-002.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 1);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-003.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-003.html
new file mode 100644
index 00000000000..abd8736419b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-003.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 2);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-004.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-004.html
new file mode 100644
index 00000000000..09a1d8c8394
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-004.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 3);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-005.html
new file mode 100644
index 00000000000..fc56326beb4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-005.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 4);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-006.html
new file mode 100644
index 00000000000..2de9d66a0d3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-spacing-006.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "lspace/rspace", 5);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-001.html
new file mode 100644
index 00000000000..672a5d3f1b3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-001.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 0);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-002.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-002.html
new file mode 100644
index 00000000000..bbf5b3e48a0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-002.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 1);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-003.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-003.html
new file mode 100644
index 00000000000..343ac09df32
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-003.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 2);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-004.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-004.html
new file mode 100644
index 00000000000..dd25c1121a5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-004.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 3);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-005.html
new file mode 100644
index 00000000000..4d716497436
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-005.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 4);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-006.html
new file mode 100644
index 00000000000..2088168b072
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-stretchy-006.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "stretchy", 5);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-001.html
new file mode 100644
index 00000000000..14b72da2833
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-001.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 0);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-002.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-002.html
new file mode 100644
index 00000000000..9f18d893d6b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-002.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 1);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-003.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-003.html
new file mode 100644
index 00000000000..73b4b07889e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-003.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 2);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-004.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-004.html
new file mode 100644
index 00000000000..6bd20562bd7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-004.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 3);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-005.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-005.html
new file mode 100644
index 00000000000..13f045fb951
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-005.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 4);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-006.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-006.html
new file mode 100644
index 00000000000..26267a76ab9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/operator-dictionary-symmetric-006.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Operator dictionary</title>
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#dictionary-based-attributes">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-dictionary">
+<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#stretchy-operator-axis">
+<meta name="assert" content="Verify default properties for characters that are in the operator dictionary, as well as for U+00A0 NO-BREAK SPACE">
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/operator-dictionary.js"></script>
+<script src="./support/operator-dictionary-tests.js"></script>
+<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
+<script>
+  setup({ explicit_done: true });
+  window.addEventListener("load", () => { document.fonts.ready.then(runTests); });
+  async function runTests() {
+      let json = await fetchOperatorDictionary();
+      OperatorDictionaryTests.run(json, "symmetric", 5);
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/support/operator-dictionary-tests.js b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/support/operator-dictionary-tests.js
index 838a22c446b..b92a852738f 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/support/operator-dictionary-tests.js
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/operators/support/operator-dictionary-tests.js
@@ -187,60 +187,32 @@ symmetric for "${parsedKey.characters}" (${parsedKey.form}): \
         div.style.display = "none";
     },
 
-    "accent": function(json, key) {
-        let parsedKey = splitKey(key);
-        let entry = json.dictionary[key];
-        let epsilon = 1;
-
-        // FIXME: Should really detect accent support...
-        assert_true(MathMLFeatureDetection.has_mover());
-        var defaultValue = defaultPropertyValue(entry, "accent");
-        document.body.insertAdjacentHTML("beforeend", `<div>\
-accent for "${parsedKey.characters}" (${parsedKey.form}): \
-<math>\
-  <mover>\
-    <mn>&nbsp;</mn>\
-    <mo form="${parsedKey.form}">${parsedKey.characters}</mo>\
-  </mover>\
-</math>\
- VS \
-<math>\
-  <mover>\
-    <mn>&nbsp;</mn>\
-    <mo form="${parsedKey.form}" accent="${defaultValue}">${parsedKey.characters}</mo>\
-  </mover>\
-</math>\
-</div>`);
-        var div = document.body.lastElementChild;
-        var movers = div.getElementsByTagName("mover");
-        function gapBetweenBaseAndScript(mover) {
-            return mover.children[0].getBoundingClientRect().top -
-                mover.children[1].getBoundingClientRect().bottom;
-        }
-        var gap = gapBetweenBaseAndScript(movers[0])
-        var gapRef = gapBetweenBaseAndScript(movers[1])
-        assert_approx_equals(gap, gapRef, epsilon, `Accent property for ${key} should be '${defaultValue}'`);
-        div.style.display = "none";
-    },
-
-    run: function(json, name) {
+    run: function(json, name, fileIndex) {
         // The operator dictionary has more than one thousand of entries so the
         // tests are grouped in chunks so that these don't get much more
         // importance than other MathML tests. For easy debugging, one can set the
         // chunk size to 1. Also, note that the test div will remain visible for
         // failed tests.
         const entryPerChunk = 50
+        const filesPerProperty = 6
 
         var counter = 0;
         var test;
 
         for (key in json.dictionary) {
 
-            if (counter % entryPerChunk === 0) {
+            // Skip this key if it does not belong to that test file.
+            if (counter % filesPerProperty != fileIndex) {
+                counter++;
+                continue;
+            }
+
+            var counterInFile = (counter - fileIndex) / filesPerProperty;
+            if (counterInFile % entryPerChunk === 0) {
                 // Start of a new chunk.
                 // Complete current async tests and create new ones for the next chunk.
                 if (test) test.done();
-                test = async_test(`Operator dictionary chunk ${1 + counter / entryPerChunk} - ${name}`);
+                test = async_test(`Operator dictionary chunk ${1 + counterInFile / entryPerChunk} - ${name}`);
             }
 
             test.step(function() {
diff --git a/tests/wpt/web-platform-tests/mathml/support/operator-dictionary.json b/tests/wpt/web-platform-tests/mathml/support/operator-dictionary.json
index 2e9abe73b39..5dd0ab53724 100644
--- a/tests/wpt/web-platform-tests/mathml/support/operator-dictionary.json
+++ b/tests/wpt/web-platform-tests/mathml/support/operator-dictionary.json
@@ -1 +1 @@
-{"comment": "This file was automatically generated by operator-dictionary.py. Do not edit.", "dictionary": {"! postfix": {"lspace": 1, "rspace": 0}, "!! postfix": {"lspace": 1, "rspace": 0}, "!= infix": {"lspace": 4, "rspace": 4}, "\" postfix": {"accent": true, "lspace": 0, "rspace": 0}, "% infix": {"lspace": 3, "rspace": 3}, "& postfix": {"lspace": 0, "rspace": 0}, "&& infix": {"lspace": 4, "rspace": 4}, "' postfix": {"accent": true, "lspace": 0, "rspace": 0}, "( prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, ") postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "* infix": {"lspace": 3, "rspace": 3}, "** infix": {"lspace": 1, "rspace": 1}, "*= infix": {"lspace": 4, "rspace": 4}, "+ infix": {"lspace": 4, "rspace": 4}, "+ prefix": {"lspace": 0, "rspace": 1}, "++ postfix": {"lspace": 0, "rspace": 0}, "+= infix": {"lspace": 4, "rspace": 4}, ", infix": {"lspace": 0, "rspace": 3}, "- infix": {"lspace": 4, "rspace": 4}, "- prefix": {"lspace": 0, "rspace": 1}, "-- postfix": {"lspace": 0, "rspace": 0}, "-= infix": {"lspace": 4, "rspace": 4}, "-> infix": {"lspace": 5, "rspace": 5}, ". infix": {"lspace": 3, "rspace": 3}, ".. postfix": {"lspace": 0, "rspace": 0}, "... postfix": {"lspace": 0, "rspace": 0}, "/ infix": {"lspace": 1, "rspace": 1}, "// infix": {"lspace": 1, "rspace": 1}, "/= infix": {"lspace": 4, "rspace": 4}, ": infix": {"lspace": 1, "rspace": 2}, ":= infix": {"lspace": 4, "rspace": 4}, "; infix": {"lspace": 0, "rspace": 3}, "< infix": {"lspace": 5, "rspace": 5}, "<= infix": {"lspace": 5, "rspace": 5}, "<> infix": {"lspace": 1, "rspace": 1}, "= infix": {"horizontal": true, "lspace": 5, "rspace": 5}, "== infix": {"lspace": 4, "rspace": 4}, "> infix": {"lspace": 5, "rspace": 5}, ">= infix": {"lspace": 5, "rspace": 5}, "? infix": {"lspace": 1, "rspace": 1}, "@ infix": {"lspace": 1, "rspace": 1}, "[ prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "\\ infix": {"lspace": 0, "rspace": 0}, "] postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "^ infix": {"horizontal": true, "lspace": 1, "rspace": 1}, "^ postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "_ infix": {"horizontal": true, "lspace": 1, "rspace": 1}, "_ postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "` postfix": {"accent": true, "lspace": 0, "rspace": 0}, "{ prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "| infix": {"lspace": 2, "rspace": 2, "stretchy": true, "symmetric": true}, "| postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "| prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "|| infix": {"lspace": 2, "rspace": 2, "stretchy": true, "symmetric": true}, "|| postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "|| prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "||| infix": {"lspace": 2, "rspace": 2, "stretchy": true, "symmetric": true}, "||| postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "||| prefix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "} postfix": {"lspace": 0, "rspace": 0, "stretchy": true, "symmetric": true}, "~ postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u00a0 infix": {}, "\u00a0 prefix": {}, "\u00a0 suffix": {}, "\u00a8 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00aa postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00ac prefix": {"lspace": 2, "rspace": 1}, "\u00af postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u00b0 postfix": {"lspace": 0, "rspace": 0}, "\u00b1 infix": {"lspace": 4, "rspace": 4}, "\u00b1 prefix": {"lspace": 0, "rspace": 1}, "\u00b2 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00b3 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00b4 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00b7 infix": {"lspace": 4, "rspace": 4}, "\u00b8 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00b9 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00ba postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u00d7 infix": {"lspace": 4, "rspace": 4}, "\u00f7 infix": {"lspace": 4, "rspace": 4}, "\u02c6 postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u02c7 postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u02c9 postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u02ca postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02cb postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02cd postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u02d8 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02d9 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02da postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02dc postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u02dd postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u02f7 postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u0302 postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u0311 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u03f6 infix": {"lspace": 5, "rspace": 5}, "\u2016 postfix": {"lspace": 0, "rspace": 0, "stretchy": true}, "\u2016 prefix": {"lspace": 0, "rspace": 0, "stretchy": true}, "\u2018 prefix": {"lspace": 0, "rspace": 0}, "\u2019 postfix": {"lspace": 0, "rspace": 0}, "\u201a postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u201b postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u201c prefix": {"lspace": 0, "rspace": 0}, "\u201d postfix": {"lspace": 0, "rspace": 0}, "\u201e postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u201f postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2022 infix": {"lspace": 4, "rspace": 4}, "\u2026 infix": {"lspace": 0, "rspace": 0}, "\u2032 postfix": {"lspace": 0, "rspace": 0}, "\u2033 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2034 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2035 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2036 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2037 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u203e postfix": {"accent": true, "horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\u2043 infix": {"lspace": 4, "rspace": 4}, "\u2044 infix": {"lspace": 4, "rspace": 4, "stretchy": true}, "\u2057 postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2061 infix": {"lspace": 0, "rspace": 0}, "\u2062 infix": {"lspace": 0, "rspace": 0}, "\u2063 infix": {"lspace": 0, "rspace": 0}, "\u2064 infix": {"lspace": 0, "rspace": 0}, "\u20db postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u20dc postfix": {"accent": true, "lspace": 0, "rspace": 0}, "\u2145 prefix": {"lspace": 2, "rspace": 1}, "\u2146 prefix": {"lspace": 2, "rspace": 0}, "\u2190 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2191 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u2192 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2193 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u2194 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2195 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u2196 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u2197 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u2198 infix": {"horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2199 infix": {"horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u219a infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u219b infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u219c infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u219d infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u219e infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u219f infix": {"accent": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a0 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a1 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21a2 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a3 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a4 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a5 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21a6 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21a7 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21a8 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21a9 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21aa infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ab infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ac infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ad infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ae infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21af infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b0 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b1 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b2 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b3 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b4 infix": {"horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21b5 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21b6 infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21b7 infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21b8 infix": {"lspace": 5, "rspace": 5}, "\u21b9 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ba infix": {"lspace": 5, "rspace": 5}, "\u21bb infix": {"lspace": 5, "rspace": 5}, "\u21bc infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21bd infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21be infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21bf infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21c0 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21c1 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21c2 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21c3 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21c4 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21c5 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21c6 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21c7 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21c8 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21c9 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21ca infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21cb infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21cc infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21cd infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21ce infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21cf infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21d0 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21d1 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d2 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21d3 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d4 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21d5 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d6 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d7 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d8 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21d9 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21da infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21db infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21dc infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21dd infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21de infix": {"lspace": 5, "rspace": 5}, "\u21df infix": {"lspace": 5, "rspace": 5}, "\u21e0 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e1 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21e2 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e3 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21e4 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e5 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e6 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e7 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21e8 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21e9 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21ea infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21eb infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21ec infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21ed infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21ee infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21ef infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21f0 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21f1 infix": {"lspace": 5, "rspace": 5}, "\u21f2 infix": {"lspace": 5, "rspace": 5}, "\u21f3 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21f4 infix": {"accent": true, "lspace": 5, "rspace": 5}, "\u21f5 infix": {"lspace": 5, "rspace": 5, "stretchy": true}, "\u21f6 infix": {"accent": true, "horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u21f7 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{"lspace": 5, "rspace": 5}, "\u2b05 infix": {"lspace": 5, "rspace": 5}, "\u2b06 infix": {"lspace": 5, "rspace": 5}, "\u2b07 infix": {"lspace": 5, "rspace": 5}, "\u2b08 infix": {"lspace": 5, "rspace": 5}, "\u2b09 infix": {"lspace": 5, "rspace": 5}, "\u2b0a infix": {"lspace": 5, "rspace": 5}, "\u2b0b infix": {"lspace": 5, "rspace": 5}, "\u2b0c infix": {"lspace": 5, "rspace": 5}, "\u2b0d infix": {"lspace": 5, "rspace": 5}, "\u2b0e infix": {"lspace": 5, "rspace": 5}, "\u2b0f infix": {"lspace": 5, "rspace": 5}, "\u2b10 infix": {"lspace": 5, "rspace": 5}, "\u2b11 infix": {"lspace": 5, "rspace": 5}, "\u2b30 infix": {"lspace": 5, "rspace": 5}, "\u2b31 infix": {"lspace": 5, "rspace": 5}, "\u2b32 infix": {"lspace": 4, "rspace": 4}, "\u2b33 infix": {"lspace": 5, "rspace": 5}, "\u2b34 infix": {"lspace": 5, "rspace": 5}, "\u2b35 infix": {"lspace": 5, "rspace": 5}, "\u2b36 infix": {"lspace": 5, "rspace": 5}, "\u2b37 infix": {"lspace": 5, "rspace": 5}, "\u2b38 infix": {"lspace": 5, "rspace": 5}, "\u2b39 infix": {"lspace": 5, "rspace": 5}, "\u2b3a infix": {"lspace": 5, "rspace": 5}, "\u2b3b infix": {"lspace": 5, "rspace": 5}, "\u2b3c infix": {"lspace": 5, "rspace": 5}, "\u2b3d infix": {"lspace": 5, "rspace": 5}, "\u2b3e infix": {"lspace": 5, "rspace": 5}, "\u2b3f infix": {"lspace": 5, "rspace": 5}, "\u2b40 infix": {"lspace": 5, "rspace": 5}, "\u2b41 infix": {"lspace": 5, "rspace": 5}, "\u2b42 infix": {"lspace": 5, "rspace": 5}, "\u2b43 infix": {"lspace": 5, "rspace": 5}, "\u2b44 infix": {"lspace": 5, "rspace": 5}, "\u2b45 infix": {"horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2b46 infix": {"horizontal": true, "lspace": 5, "rspace": 5, "stretchy": true}, "\u2b47 infix": {"lspace": 5, "rspace": 5}, "\u2b48 infix": {"lspace": 5, "rspace": 5}, "\u2b49 infix": {"lspace": 5, "rspace": 5}, "\u2b4a infix": {"lspace": 5, "rspace": 5}, "\u2b4b infix": {"lspace": 5, "rspace": 5}, "\u2b4c infix": {"lspace": 5, "rspace": 5}, "\u2b4d infix": {"lspace": 5, "rspace": 5}, "\u2b4e infix": {"lspace": 5, "rspace": 5}, "\u2b4f infix": {"lspace": 5, "rspace": 5}, "\u2b5a infix": {"lspace": 5, "rspace": 5}, "\u2b5b infix": {"lspace": 5, "rspace": 5}, "\u2b5c infix": {"lspace": 5, "rspace": 5}, "\u2b5d infix": {"lspace": 5, "rspace": 5}, "\u2b5e infix": {"lspace": 5, "rspace": 5}, "\u2b5f infix": {"lspace": 5, "rspace": 5}, "\u2b60 infix": {"lspace": 5, "rspace": 5}, "\u2b61 infix": {"lspace": 5, "rspace": 5}, "\u2b62 infix": {"lspace": 5, "rspace": 5}, "\u2b63 infix": {"lspace": 5, "rspace": 5}, "\u2b64 infix": {"lspace": 5, "rspace": 5}, "\u2b65 infix": {"lspace": 5, "rspace": 5}, "\u2b66 infix": {"lspace": 5, "rspace": 5}, "\u2b67 infix": {"lspace": 5, "rspace": 5}, "\u2b68 infix": {"lspace": 5, "rspace": 5}, "\u2b69 infix": {"lspace": 5, "rspace": 5}, "\u2b6a infix": {"lspace": 5, "rspace": 5}, "\u2b6b infix": {"lspace": 5, "rspace": 5}, "\u2b6c infix": {"lspace": 5, "rspace": 5}, "\u2b6d infix": {"lspace": 5, "rspace": 5}, "\u2b6e infix": {"lspace": 5, "rspace": 5}, "\u2b6f infix": {"lspace": 5, "rspace": 5}, "\u2b70 infix": {"lspace": 5, "rspace": 5}, "\u2b71 infix": {"lspace": 5, "rspace": 5}, "\u2b72 infix": {"lspace": 5, "rspace": 5}, "\u2b73 infix": {"lspace": 5, "rspace": 5}, "\u2b76 infix": {"lspace": 5, "rspace": 5}, "\u2b77 infix": {"lspace": 5, "rspace": 5}, "\u2b78 infix": {"lspace": 5, "rspace": 5}, "\u2b79 infix": {"lspace": 5, "rspace": 5}, "\u2b7a infix": {"lspace": 5, "rspace": 5}, "\u2b7b infix": {"lspace": 5, "rspace": 5}, "\u2b7c infix": {"lspace": 5, "rspace": 5}, "\u2b7d infix": {"lspace": 5, "rspace": 5}, "\u2b80 infix": {"lspace": 5, "rspace": 5}, "\u2b81 infix": {"lspace": 5, "rspace": 5}, "\u2b82 infix": {"lspace": 5, "rspace": 5}, "\u2b83 infix": {"lspace": 5, "rspace": 5}, "\u2b84 infix": {"lspace": 5, "rspace": 5}, "\u2b85 infix": {"lspace": 5, "rspace": 5}, "\u2b86 infix": {"lspace": 5, "rspace": 5}, "\u2b87 infix": {"lspace": 5, "rspace": 5}, "\u2b88 infix": {"lspace": 5, "rspace": 5}, "\u2b89 infix": {"lspace": 5, "rspace": 5}, "\u2b8a infix": {"lspace": 5, "rspace": 5}, "\u2b8b infix": {"lspace": 5, "rspace": 5}, "\u2b8c infix": {"lspace": 5, "rspace": 5}, "\u2b8d infix": {"lspace": 5, "rspace": 5}, "\u2b8e infix": {"lspace": 5, "rspace": 5}, "\u2b8f infix": {"lspace": 5, "rspace": 5}, "\u2b94 infix": {"lspace": 5, "rspace": 5}, "\u2b95 infix": {"lspace": 5, "rspace": 5}, "\u2ba0 infix": {"lspace": 5, "rspace": 5}, "\u2ba1 infix": {"lspace": 5, "rspace": 5}, "\u2ba2 infix": {"lspace": 5, "rspace": 5}, "\u2ba3 infix": {"lspace": 5, "rspace": 5}, "\u2ba4 infix": {"lspace": 5, "rspace": 5}, "\u2ba5 infix": {"lspace": 5, "rspace": 5}, "\u2ba6 infix": {"lspace": 5, "rspace": 5}, "\u2ba7 infix": {"lspace": 5, "rspace": 5}, "\u2ba8 infix": {"lspace": 5, "rspace": 5}, "\u2ba9 infix": {"lspace": 5, "rspace": 5}, "\u2baa infix": {"lspace": 5, "rspace": 5}, "\u2bab infix": {"lspace": 5, "rspace": 5}, "\u2bac infix": {"lspace": 5, "rspace": 5}, "\u2bad infix": {"lspace": 5, "rspace": 5}, "\u2bae infix": {"lspace": 5, "rspace": 5}, "\u2baf infix": {"lspace": 5, "rspace": 5}, "\u2bb0 infix": {"lspace": 5, "rspace": 5}, "\u2bb1 infix": {"lspace": 5, "rspace": 5}, "\u2bb2 infix": {"lspace": 5, "rspace": 5}, "\u2bb3 infix": {"lspace": 5, "rspace": 5}, "\u2bb4 infix": {"lspace": 5, "rspace": 5}, "\u2bb5 infix": {"lspace": 5, "rspace": 5}, "\u2bb6 infix": {"lspace": 5, "rspace": 5}, "\u2bb7 infix": {"lspace": 5, "rspace": 5}, "\u2bb8 infix": {"lspace": 5, "rspace": 5}, "\u2bd1 infix": {"lspace": 5, "rspace": 5}, "\ud83b\udef0 postfix": {"horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\ud83b\udef1 postfix": {"horizontal": true, "lspace": 0, "rspace": 0, "stretchy": true}, "\ud83e\udc00 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc01 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc02 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc03 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc04 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc05 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc06 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc07 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc08 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc09 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc0a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc0b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc10 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc11 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc12 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc13 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc14 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc15 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc16 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc17 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc18 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc19 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1c infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1d infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1e infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc1f infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc20 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc21 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc22 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc23 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc24 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc25 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc26 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc27 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc28 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc29 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2c infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2d infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2e infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc2f infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc30 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc31 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc32 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc33 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc34 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc35 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc36 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc37 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc38 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc39 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3c infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3d infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3e infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc3f infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc40 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc41 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc42 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc43 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc44 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc45 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc46 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc47 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc50 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc51 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc52 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc53 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc54 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc55 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc56 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc57 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc58 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc59 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc60 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc61 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc62 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc63 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc64 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc65 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc66 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc67 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc68 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc69 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6c infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6d infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6e infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc6f infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc70 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc71 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc72 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc73 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc74 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc75 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc76 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc77 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc78 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc79 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7c infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7d infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7e infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc7f infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc80 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc81 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc82 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc83 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc84 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc85 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc86 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc87 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc98 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc99 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc9a infix": {"lspace": 5, "rspace": 5}, "\ud83e\udc9b infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca0 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca1 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca2 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca3 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca4 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca5 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca6 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca7 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca8 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udca9 infix": {"lspace": 5, "rspace": 5}, "\ud83e\udcaa infix": {"lspace": 5, "rspace": 5}, "\ud83e\udcab infix": {"lspace": 5, "rspace": 5}}}
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse.html
index 32056f09cc1..bae2d14012f 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse.html
@@ -40,6 +40,10 @@
             var ownEventForTheCapturedTargetGot = false;
             var count=0;
             var event_log = [];
+            var actions_promise1;
+            var actions_promise2;
+            var actions_promise3;
+            var actions_promise4;
 
             var detected_pointertypes = {};
             add_completion_callback(end_of_test);
@@ -64,12 +68,16 @@
                 });
 
                 on_event(target0, 'gotpointercapture', function(e) {
-                    test_gotpointercapture.done();
+                    actions_promise3.then( () => {
+                        test_gotpointercapture.done();
+                    });
                     event_log.push('gotpointercapture@target0');
                 });
 
                 on_event(target0, 'lostpointercapture', function(e) {
-                    test_lostpointercapture.done();
+                    actions_promise4.then( () => {
+                        test_lostpointercapture.done();
+                    });
                     isPointerCapture = false;
                     event_log.push('lostpointercapture@target0');
                 });
@@ -84,11 +92,13 @@
                 on_event(target0, "pointermove", function (event) {
                     detected_pointertypes[ event.pointerType ] = true;
                     if(!pointermoveNoCaptureGot0) {
-                        test_pointermove0.done();
-                        event_log.push('pointermove@target0');
-                        pointermoveNoCaptureGot0 = true;
-                        // Second dispatch a pointer move to target1.
-                        new test_driver.Actions().pointerMove(0, 0, {origin: target1}).send();
+                        actions_promise2 = actions_promise1.then( () => {
+                            test_pointermove0.done();
+                            event_log.push('pointermove@target0');
+                            pointermoveNoCaptureGot0 = true;
+                            // Second dispatch a pointer move to target1.
+                            return new test_driver.Actions().pointerMove(0, 0, {origin: target1}).send();
+                        });
                     }
                     if(isPointerCapture) {
                         if(!pointermoveCaptureGot0) {
@@ -105,7 +115,9 @@
                             event_log.push('pointermove@target0');
                             pointermoveCaptureGot0 = true;
                             // Fourth dispatch a pointer move to target0.
-                            new test_driver.Actions().pointerMove(0, 0, {origin: target0}).send();
+                            actions_promise4 = actions_promise3.then( () => {
+                                return new test_driver.Actions().pointerMove(0, 0, {origin: target0}).send();
+                            });
                         }
                         if((event.clientX > target0.getBoundingClientRect().left)&&
                             (event.clientX < target0.getBoundingClientRect().right)&&
@@ -122,7 +134,7 @@
                 });
 
                 // First dispatch a pointer move to target0.
-                new test_driver.Actions().pointerMove(0, 0, {origin: target0}).send();
+                actions_promise1 = new test_driver.Actions().pointerMove(0, 0, {origin: target0}).send();
 
                 on_event(target1, "pointermove", function (event) {
                     test(function() {
@@ -130,17 +142,19 @@
                     }, "pointermove shouldn't trigger for the purple rectangle while the black rectangle has capture");
 
                     if(!pointermoveNoCaptureGot1) {
-                        test_pointermove1.done();
-                        event_log.push('pointermove@target1');
-                        pointermoveNoCaptureGot1 = true;
-                        // Third, drag the mouse from btnCapture, target1 to target0.
-                        new test_driver.Actions()
-                            .pointerMove(0, 0, {origin: btnCapture})
-                            .pointerDown()
-                            .pointerMove(0, 0, {origin: target1})
-                            .pointerMove(0, 0, {origin: target0})
-                            .pointerUp()
-                            .send();
+                        actions_promise3 = actions_promise2.then( () => {
+                            test_pointermove1.done();
+                            event_log.push('pointermove@target1');
+                            pointermoveNoCaptureGot1 = true;
+                            // Third, drag the mouse from btnCapture, target1 to target0.
+                            return new test_driver.Actions()
+                                .pointerMove(0, 0, {origin: btnCapture})
+                                .pointerDown()
+                                .pointerMove(0, 0, {origin: target1})
+                                .pointerMove(0, 0, {origin: target0})
+                                .pointerUp()
+                                .send();
+                        });
                     }
                 });
             }
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_invalid_pointerid.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_invalid_pointerid.html
index f51674cb429..71de1980899 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_invalid_pointerid.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_invalid_pointerid.html
@@ -26,6 +26,7 @@
             add_completion_callback(showPointerTypes);
 
             var INVALID_POINTERID = 314159265358973923;
+            var actions_promise;
 
             function run() {
                 var target0 = document.getElementById("target0");
@@ -41,7 +42,10 @@
                                         "It should not be possible to release capture an invalid pointer id");
                     });
 
-                    test_pointerEvent.done(); // complete test
+                    // Make sure the test finishes after all the input actions are completed.
+                    actions_promise.then( () => {
+                        test_pointerEvent.done();
+                    });
                 });
 
                 // set pointer capture
@@ -51,7 +55,7 @@
                 });
 
                 // Inject mouse inputs.
-                new test_driver.Actions()
+                actions_promise = new test_driver.Actions()
                     .pointerMove(0, 0, {origin: target0})
                     .pointerDown()
                     .pointerMove(10, 0, {origin: target0})
diff --git a/tests/wpt/web-platform-tests/resource-timing/cross-origin-status-codes.html b/tests/wpt/web-platform-tests/resource-timing/cross-origin-status-codes.html
new file mode 100644
index 00000000000..e8ece5ff2fe
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resource-timing/cross-origin-status-codes.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<html>
+<head>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src=/common/get-host-info.sub.js></script>
+</head>
+<body>
+<img id="img_200">
+<img id="img_307">
+<img id="img_404">
+<img id="img_502">
+<script id="script_200"></script>
+<script id="script_307"></script>
+<script id="script_404"></script>
+<script id="script_502"></script>
+<script>
+async_test(t => {
+  let destUrl = get_host_info().HTTP_REMOTE_ORIGIN + '/resource-timing/resources/';
+  let statusCodes = ['200', '307', '404', '502'];
+  statusCodes.forEach(status => {
+    document.getElementById('img_' + status).src = destUrl + 'status-code.py?status=' + status;
+    document.getElementById('script_' + status).src = destUrl + 'status-code.py?status=' + status + '&script=1';
+  });
+  let nameMap = {};
+  let firstEntry = null;
+  // We will check that the non-timestamp values of the entry match for all entries.
+  const keys = ['entryType', 'nextHopProtocol', 'transferSize', 'encodedBodySize', 'decodedBodySize'];
+  new PerformanceObserver(t.step_func(entryList => {
+    entryList.getEntries().forEach(entry => {
+      if (!entry.name.includes("status-code"))
+        return;
+
+      nameMap[entry.name] = true;
+      if (!firstEntry) {
+        firstEntry = entry;
+      } else {
+        keys.forEach(key => {
+          assert_equals(entry[key], firstEntry[key], `Discernible difference in ${key} for ${entry.name}`);
+        });
+      }
+    });
+    if (Object.keys(nameMap).length === 8) {
+      t.done();
+    }
+  })).observe({entryTypes: ['resource']});
+}, "Make sure cross origin resource fetch failures with different status codes are indistinguishable");
+</script>
diff --git a/tests/wpt/web-platform-tests/tools/manifest/manifest.py b/tests/wpt/web-platform-tests/tools/manifest/manifest.py
index f79edc84352..19d1bbed033 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/manifest.py
+++ b/tests/wpt/web-platform-tests/tools/manifest/manifest.py
@@ -1,9 +1,17 @@
+import io
 import itertools
 import json
 import os
 from copy import deepcopy
 from multiprocessing import Pool, cpu_count
-from six import PY3, iteritems, itervalues, string_types, binary_type, text_type
+from six import (
+    PY3,
+    binary_type,
+    iteritems,
+    itervalues,
+    string_types,
+    text_type,
+)
 
 from . import vcs
 from .item import (ConformanceCheckerTest, ManifestItem, ManualTest, RefTest, SupportFile,
@@ -318,7 +326,7 @@ def _load(logger,  # type: Logger
         else:
             logger.debug("Creating new manifest at %s" % manifest)
         try:
-            with open(manifest, "rb") as f:
+            with io.open(manifest, "r", encoding="utf-8") as f:
                 rv = Manifest.from_json(tests_root,
                                         fast_json.load(f),
                                         types=types,
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executormarionette.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executormarionette.py
index 535923fdb5e..2eaf25801df 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executormarionette.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executormarionette.py
@@ -5,7 +5,7 @@ import time
 import traceback
 import uuid
 
-from six import iteritems
+from six import iteritems, iterkeys
 from six.moves.urllib.parse import urljoin
 
 errors = None
@@ -602,7 +602,7 @@ class MarionetteProtocol(Protocol):
 
     def on_environment_change(self, old_environment, new_environment):
         #Unset all the old prefs
-        for name in old_environment.get("prefs", {}).iterkeys():
+        for name in iterkeys(old_environment.get("prefs", {})):
             value = self.executor.original_pref_values[name]
             if value is None:
                 self.prefs.clear(name)
@@ -799,7 +799,7 @@ class MarionetteRefTestExecutor(RefTestExecutor):
             self.wait_script = f.read() % {"classname": "reftest-wait"}
 
     def setup(self, runner):
-        super(self.__class__, self).setup(runner)
+        super(MarionetteRefTestExecutor, self).setup(runner)
         self.implementation.setup(**self.implementation_kwargs)
 
     def teardown(self):
@@ -809,7 +809,7 @@ class MarionetteRefTestExecutor(RefTestExecutor):
                 handles = self.protocol.marionette.window_handles
                 if handles:
                     self.protocol.marionette.switch_to_window(handles[0])
-            super(self.__class__, self).teardown()
+            super(MarionetteRefTestExecutor, self).teardown()
         except Exception:
             # Ignore errors during teardown
             self.logger.warning("Exception during reftest teardown:\n%s" %
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/font.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/font.py
index daf0a1c1bfa..6226fc66fed 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/font.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/font.py
@@ -78,7 +78,12 @@ class FontInstaller(object):
         # Per https://github.com/web-platform-tests/results-collection/issues/218
         # installing Ahem on macOS is flaky, so check if it actually installed
         fonts = check_output(['/usr/sbin/system_profiler', '-xml', 'SPFontsDataType'])
-        fonts = plistlib.readPlistFromString(fonts)
+        try:
+            # if py3
+            readPlistFromBytes = plistlib.readPlistFromBytes
+        except AttributeError:
+            readPlistFromBytes = plistlib.readPlistFromString
+        fonts = readPlistFromBytes(fonts)
         assert len(fonts) == 1
         for font in fonts[0]['_items']:
             if font['path'] == installed_font_path:
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
index cc9d1e539ac..3a26efc5542 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
@@ -305,6 +305,10 @@ class TestSource(object):
     def make_queue(cls, tests, **kwargs):  # noqa: N805
         pass
 
+    @abstractmethod
+    def tests_by_group(cls, tests, **kwargs):  # noqa: N805
+        pass
+
     @classmethod
     def group_metadata(cls, state):
         return {"scope": "/"}
@@ -343,6 +347,17 @@ class GroupedSource(TestSource):
             test_queue.put(item)
         return test_queue
 
+    @classmethod
+    def tests_by_group(cls, tests, **kwargs):
+        groups = defaultdict(list)
+        state = {}
+        current = None
+        for test in tests:
+            if cls.new_group(state, test, **kwargs):
+                current = cls.group_metadata(state)['scope']
+            groups[current].append(test.id)
+        return groups
+
 
 class SingleTestSource(TestSource):
     @classmethod
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wptrunner.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wptrunner.py
index ce15c5fbbf0..d0cc19481db 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wptrunner.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wptrunner.py
@@ -236,7 +236,12 @@ def run_tests(config, test_paths, product, **kwargs):
 
                 test_count = 0
                 unexpected_count = 0
-                logger.suite_start(test_loader.test_ids,
+
+                tests = []
+                for test_type in test_loader.test_types:
+                    tests.extend(test_loader.tests[test_type])
+
+                logger.suite_start(test_source_cls.tests_by_group(tests, **test_source_kwargs),
                                    name='web-platform-test',
                                    run_info=run_info,
                                    extra={"run_by_dir": kwargs["run_by_dir"]})
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wpttest.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wpttest.py
index 27d7fbbbd7f..4b43b73610a 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wpttest.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/wpttest.py
@@ -410,7 +410,8 @@ class TestharnessTest(Test):
         jsshell = manifest_item.jsshell if hasattr(manifest_item, "jsshell") else False
         quic = manifest_item.quic if hasattr(manifest_item, "quic") else False
         script_metadata = manifest_item.script_metadata or []
-        scripts = [v for (k, v) in script_metadata if k == b"script"]
+        scripts = [v for (k, v) in script_metadata
+                   if k in (b"script", "script")]
         return cls(manifest_file.tests_root,
                    manifest_item.url,
                    inherit_metadata,
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/response.py b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/response.py
index f4009702f68..b6f27447451 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/response.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/response.py
@@ -234,9 +234,12 @@ class Response(object):
         self.write_status_headers()
         self.write_content()
 
-    def set_error(self, code, message=""):
-        """Set the response status headers and body to indicate an
-        error"""
+    def set_error(self, code, message=u""):
+        """Set the response status headers and return a JSON error object:
+
+        {"error": {"code": code, "message": message}}
+        code is an int (HTTP status code), and message is a text string.
+        """
         err = {"code": code,
                "message": message}
         data = json.dumps({"error": err})
diff --git a/tests/wpt/web-platform-tests/url/resources/urltestdata.json b/tests/wpt/web-platform-tests/url/resources/urltestdata.json
index b5b200e640c..dd40eaa5a9f 100644
--- a/tests/wpt/web-platform-tests/url/resources/urltestdata.json
+++ b/tests/wpt/web-platform-tests/url/resources/urltestdata.json
@@ -5863,6 +5863,130 @@
     "search": "",
     "hash": "#frag"
   },
+  "# file: drive letter cases from https://crbug.com/1078698",
+  {
+    "input": "file:///Y:",
+    "base": "about:blank",
+    "href": "file:///Y:",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/Y:",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///Y:/",
+    "base": "about:blank",
+    "href": "file:///Y:/",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/Y:/",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///./Y",
+    "base": "about:blank",
+    "href": "file:///Y",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/Y",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///./Y:",
+    "base": "about:blank",
+    "href": "file:///Y:",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/Y:",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "\\\\\\.\\Y:",
+    "base": "about:blank",
+    "failure": true
+  },
+  "# file: drive letter cases from https://crbug.com/1078698 but lowercased",
+  {
+    "input": "file:///y:",
+    "base": "about:blank",
+    "href": "file:///y:",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/y:",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///y:/",
+    "base": "about:blank",
+    "href": "file:///y:/",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/y:/",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///./y",
+    "base": "about:blank",
+    "href": "file:///y",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/y",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:///./y:",
+    "base": "about:blank",
+    "href": "file:///y:",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/y:",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "\\\\\\.\\y:",
+    "base": "about:blank",
+    "failure": true
+  },
   "# IPv6 tests",
   {
     "input": "http://[1:0::]",
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 cb0d5ef3af2..d0af30448df 100644
--- a/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini
+++ b/tests/wpt/webgl/meta/conformance2/rendering/draw-buffers.html.ini
@@ -137,3 +137,6 @@
   [WebGL test #52: attachment 7 should be 0,255,0,255\nat (0, 0) expected: 0,255,0,255 was 0,255,0,0]
     expected: FAIL
 
+  [WebGL test #52: attachment 7 should be 0,255,0,255\nat (0, 0) expected: 0,255,0,255 was 0,0,0,255]
+    expected: FAIL
+