Auto merge of #25874 - servo-wpt-sync:wpt_update_29-02-2020, r=servo-wpt-sync

Sync WPT with upstream (29-02-2020)

Automated downstream sync of changes from upstream as of 29-02-2020.
[no-wpt-sync]
r? @servo-wpt-sync

68 files changed, 1767 insertions, 375 deletions

diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 6bcd9b7d2e6..493a547882e 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -138884,6 +138884,32 @@
        {}
       ]
      ],
+     "test-synthetic-italic-2.html": [
+      "6e8910e22c86c309de1403060f9a5061dbbf571c",
+      [
+       null,
+       [
+        [
+         "/css/css-fonts/test-synthetic-italic-2-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "test-synthetic-italic-3.html": [
+      "f3c1a371562a299f110315b3aefb19fe5f20edbd",
+      [
+       null,
+       [
+        [
+         "/css/css-fonts/test-synthetic-italic-3-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "variations": {
       "font-descriptor-range-reversed.html": [
        "14d426245d3bdb56e67007edde5e9a49473e5694",
@@ -158892,7 +158918,7 @@
         ]
        ],
        "shape-image-024.html": [
-        "d6197e1f5210bb657541d30d18ef54abd3acd191",
+        "3ca0ba912b146a7aad4a51ad25d358b6ffb59367",
         [
          null,
          [
@@ -231187,7 +231213,7 @@
      ],
      "reftests": {
       "marker-path-001.svg": [
-       "6eeac7fc8f431bd7949bc998af68b36fdc2e1347",
+       "7fb4adf4277321eb69e50fecb9018c1950aef4ca",
        [
         null,
         [
@@ -279735,6 +279761,12 @@
       []
      ]
     },
+    "construct-stylesheets": {
+     "META.yml": [
+      "9ffc2c606c637331fc9f57e4c1905da9004dd35b",
+      []
+     ]
+    },
     "css-align": {
      "META.yml": [
       "bd26585d9e639e3133a650c26d3f3cb93579e4ae",
@@ -290166,6 +290198,14 @@
        []
       ]
      },
+     "test-synthetic-italic-2-ref.html": [
+      "d3165b681c86dbe8b0aff6d91df56a9369d2127b",
+      []
+     ],
+     "test-synthetic-italic-3-ref.html": [
+      "a0721426016c949369ae0114211136f45ce51b27",
+      []
+     ],
      "variations": {
       "META.yml": [
        "53487a6d85ecaafdc33738292312120ffed4bb6a",
@@ -315367,6 +315407,14 @@
        "6604450991a122e3e241e40b1b9e0516c525389d",
        []
       ],
+      "dedicated-worker.js": [
+       "5d46edcde24c1854c19069d967038c493d7e24f0",
+       []
+      ],
+      "iframe.html": [
+       "a6b74ad924aa108e15603544f7b0a80a3e18940b",
+       []
+      ],
       "navigate-none.sub.html": [
        "1008f70ff123ae5e507a95ac4f16d32bbb74c983",
        []
@@ -324767,6 +324815,10 @@
      "3cd3c06b54b022c61857a6a29e8e97bf4fa9b47b",
      []
     ],
+    "construct-stylesheets.idl": [
+     "fca2a3e2887a192f737b4ce05edc52810b2cd7a9",
+     []
+    ],
     "cookie-store.idl": [
      "88719369760e4b0da19ae18c4016d2ea5b3ffbe4",
      []
@@ -325108,7 +325160,7 @@
      []
     ],
     "resize-observer.idl": [
-     "448c949df9e38d90b96171a15ec0a4705e486395",
+     "60d55a19bae8b156a99b1ad8a88089297ad409e4",
      []
     ],
     "resource-timing.idl": [
@@ -341638,7 +341690,7 @@
      ],
      "reftests": {
       "marker-path-001-ref.svg": [
-       "8f766668e6de36479666f3f27fa8eed317e5dfe8",
+       "202ac3420dc080f85c4a2cac5e13ccbea6d0235e",
        []
       ],
       "marker-path-002-ref.svg": [
@@ -341666,11 +341718,11 @@
        []
       ],
       "marker-path-022-ref.svg": [
-       "2b808f02f0988ab49a8bd6a45af9127910d198cf",
+       "8abf33f0880849010f7687452a48a0648aad40d2",
        []
       ],
       "marker-path-023-ref.svg": [
-       "a8e764442bb7dee2ce259082cf7cc0c8d1e143e0",
+       "4bd1c67776206fb730abd16a8a69db4ad0922ff9",
        []
       ],
       "markers-orient-001-ref.svg": [
@@ -341979,7 +342031,7 @@
     },
     "styling": {
      "presentation-attributes.js": [
-      "c9dc14ad49072cc42bfb09362f421a2f99d437f9",
+      "552041496f187e97b4e17bfa445826d8cd278b99",
       []
      ],
      "render": {
@@ -347907,7 +347959,7 @@
         []
        ],
        "base.py": [
-        "cb7323ece0ae4a9af7213a0134e976ef325e3e13",
+        "ab36c95c11339951c9c5ccd5da4c19551ba8f8de",
         []
        ],
        "executorchrome.py": [
@@ -347927,7 +347979,7 @@
         []
        ],
        "executormarionette.py": [
-        "4739d09b572d5007c2a03128cb8e2e04856cf966",
+        "3f0b92f23b3e7797918cf171566f3b4b8acbbcb0",
         []
        ],
        "executoropera.py": [
@@ -347939,7 +347991,7 @@
         []
        ],
        "executorselenium.py": [
-        "39d723a788662dd55c2707eb8d670dba6237cd3c",
+        "5524d70bc718f859c6d20e06c7f86029a7b141ac",
         []
        ],
        "executorservo.py": [
@@ -347947,11 +347999,11 @@
         []
        ],
        "executorservodriver.py": [
-        "02ecc756647656e6b20e06371d28767fa0eb00f1",
+        "f6701da34058b43da63f9f82044833da0cfb9faf",
         []
        ],
        "executorwebdriver.py": [
-        "eccba8c4a127f7895baa85948dc21006d5910aa5",
+        "96488f462e7c89b0526a0d58ddb8ddb2cdb03a44",
         []
        ],
        "executorwebkit.py": [
@@ -348050,7 +348102,7 @@
        []
       ],
       "metadata.py": [
-       "73b6de9ad0fd69ef1d6fce10c1e8568b9bdce9c7",
+       "69373c3387f18d9b0e97e8448dcc5679135b08cd",
        []
       ],
       "process.py": [
@@ -348094,7 +348146,7 @@
        []
       ],
       "testrunner.py": [
-       "51e75442ce714cf3ba13751ad376b5d5307ead4c",
+       "f0d830787a46ad143f1e33c7783f5ff6dd1ff830",
        []
       ],
       "tests": {
@@ -350212,7 +350264,7 @@
      []
     ],
     "helpers.js": [
-     "bf28e69cccf9b9fe2ba6becbda30910bb50a140e",
+     "0fc64c8b522cfd7fce2ec585e2ec1d6bd839b855",
      []
     ],
     "resources": {
@@ -382955,6 +383007,15 @@
       ]
      }
     },
+    "construct-stylesheets": {
+     "idlharness.html": [
+      "85de760d6c7e3d10cbd72d35a4cbd900f37abc6c",
+      [
+       null,
+       {}
+      ]
+     ]
+    },
     "css-align": {
      "animation": {
       "column-gap-composition.html": [
@@ -383871,7 +383932,7 @@
       ]
      ],
      "Document-getAnimations.tentative.html": [
-      "4a9768a8b610e5327cc3497a1ec6f301642468a7",
+      "b3108759d86f3f23741070388abe5d11bece7d4a",
       [
        null,
        {}
@@ -383966,7 +384027,7 @@
       ]
      ],
      "event-order.tentative.html": [
-      "f4f9e29a3c859daaa9727fe3009f837a7ddeb1be",
+      "58f0bb67cafdd6bc81b17a8845280ded94b73b63",
       [
        null,
        {}
@@ -392267,6 +392328,29 @@
       ]
      }
     },
+    "css-page": {
+     "page-rule-declarations-000.html": [
+      "227b9148a3870617ffccff141e1f763a631024b6",
+      [
+       null,
+       {}
+      ]
+     ],
+     "page-rule-declarations-001.html": [
+      "e57424029ba827862e7be5bd1c7e949b74c58331",
+      [
+       null,
+       {}
+      ]
+     ],
+     "page-rule-declarations-002.html": [
+      "183072dec676d6e913c3ed35935d5e06f3fd4963",
+      [
+       null,
+       {}
+      ]
+     ]
+    },
     "css-paint-api": {
      "idlharness.html": [
       "aad04a17cc4c660084fa196cb85da5d88b8560d4",
@@ -399077,7 +399161,7 @@
       ]
      ],
      "Document-getAnimations.tentative.html": [
-      "cecddfaa401f90ff0226d39f1c7eae9be9b7b10c",
+      "cd97acfd5ec76c7585d5356c86b3832bb0b7bd37",
       [
        null,
        {}
@@ -399275,7 +399359,14 @@
       ]
      ],
      "non-rendered-element-002.html": [
-      "f26a04895781b389d7bad5aee80122b1e1d878a9",
+      "accf1410376ec9efadd4c8b66aca7405f5c84ddb",
+      [
+       null,
+       {}
+      ]
+     ],
+     "non-rendered-element-004.tentative.html": [
+      "1fe2af1253d13f5719774a4ebae1203790bcfd6a",
       [
        null,
        {}
@@ -405930,7 +406021,14 @@
          {}
         ]
        ]
-      }
+      },
+      "style-attribute-selector.html": [
+       "83e8102c015dcdda1933678f0bbf5bd1f2f67bf0",
+       [
+        null,
+        {}
+       ]
+      ]
      },
      "child-indexed-pseudo-class.html": [
       "2e496d854184796be55d66566af8739fd4a7f776",
@@ -407753,6 +407851,15 @@
       ]
      ],
      "scrolling": {
+      "input-text-scroll-event-when-using-arrow-keys.html": [
+       "f84e4465275b7a3401c8cde88677465d3cc5a18c",
+       [
+        null,
+        {
+         "testdriver": true
+        }
+       ]
+      ],
       "overscroll-deltas.html": [
        "091cfd0631b454babaeb8c32dd289468b6d509d3",
        [
@@ -430903,6 +431010,13 @@
        {}
       ]
      ],
+     "dedicated-worker-cache-storage.https.html": [
+      "2559de839a304dce0c2700dc4f8ee0002de04332",
+      [
+       null,
+       {}
+      ]
+     ],
      "javascript.https.html": [
       "9fe85db76f54507b1c80b9f7077a916b8795f0f9",
       [
@@ -537166,7 +537280,7 @@
       ]
      ],
      "presentation-attributes-special-cases.html": [
-      "c544c9c7a64d8b17178c860f2f8c9ee14c0ab998",
+      "8fa045984d9ad55097768e6608146bbe2b37e8bf",
       [
        null,
        {}
@@ -549482,8 +549596,15 @@
         {}
        ]
       ],
+      "k-rate-connections.html": [
+       "730f03e5619577abf98c30b5566cddeeccf31551",
+       [
+        null,
+        {}
+       ]
+      ],
       "k-rate-constant-source.html": [
-       "4db3548dacb990b39a5dd2bc53610c8d7a4c4a9d",
+       "0bea5c91f8538e6b0e9d587af1b5c8e4b018ab62",
        [
         null,
         {}
@@ -550554,7 +550675,7 @@
      ]
     ],
     "createcredential-timeout.https.html": [
-     "09af4520ae87f3540772d3d257d385dfc3647058",
+     "fc35a6e72f0a76a4ff410df71b346109cc215681",
      [
       null,
       {
@@ -550604,7 +550725,7 @@
      ]
     ],
     "getcredential-timeout.https.html": [
-     "228ef50978971c2b17882c5f33ad4e68da61b44f",
+     "c4d8aed38c63afa9fc1b720e244a918ebb1e8e0d",
      [
       null,
       {
@@ -550655,7 +550776,7 @@
      ]
     ],
     "webauthn-testdriver-basic.https.html": [
-     "7790f5d0d3fd7567df24a3aeebc4d7541c118e1a",
+     "4b8b08d975ebb5ef56c3aa27f2a24e630a500314",
      [
       null,
       {
@@ -560766,7 +560887,7 @@
       ]
      ],
      "shared-worker-import-failure.html": [
-      "5e8f547daf69efe77a2631e78f894e0e76ac23d2",
+      "14579ba762ff469d8e964ba8cfe1f584c5dd5f03",
       [
        null,
        {}
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
deleted file mode 100644
index f64b45fea6b..00000000000
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[hit-test-floats-002.html]
-  [Hit test float]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
new file mode 100644
index 00000000000..4bfb0c2053a
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
@@ -0,0 +1,4 @@
+[hit-test-floats-004.html]
+  [Miss float below something else]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
deleted file mode 100644
index baa9f1a7541..00000000000
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[hit-test-floats-005.html]
-  [Miss clipped float]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/css-animations/Document-getAnimations.tentative.html.ini b/tests/wpt/metadata/css/css-animations/Document-getAnimations.tentative.html.ini
index a2a02dff6dc..016bd72d857 100644
--- a/tests/wpt/metadata/css/css-animations/Document-getAnimations.tentative.html.ini
+++ b/tests/wpt/metadata/css/css-animations/Document-getAnimations.tentative.html.ini
@@ -44,3 +44,6 @@
   [Order of CSS Animations - within an element unaffected by start time]
     expected: FAIL
 
+  [CSS Animations targetting (pseudo-)elements should have correct order after sorting (::marker)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-animations/event-order.tentative.html.ini b/tests/wpt/metadata/css/css-animations/event-order.tentative.html.ini
index 5286c0e29f8..1cc72db35d7 100644
--- a/tests/wpt/metadata/css/css-animations/event-order.tentative.html.ini
+++ b/tests/wpt/metadata/css/css-animations/event-order.tentative.html.ini
@@ -26,3 +26,6 @@
   [Iteration and end events are ordered by time]
     expected: FAIL
 
+  [Same events on pseudo-elements follow the prescribed order (::marker)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-2.html.ini b/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-2.html.ini
new file mode 100644
index 00000000000..81c161354c3
--- /dev/null
+++ b/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-2.html.ini
@@ -0,0 +1,2 @@
+[test-synthetic-italic-2.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-3.html.ini b/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-3.html.ini
new file mode 100644
index 00000000000..5efbce5a4c3
--- /dev/null
+++ b/tests/wpt/metadata/css/css-fonts/test-synthetic-italic-3.html.ini
@@ -0,0 +1,2 @@
+[test-synthetic-italic-3.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
index 4a1e8110f6f..f8e7e539aae 100644
--- a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
+++ b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
@@ -2,3 +2,6 @@
   [Hit test intersecting scaled box]
     expected: FAIL
 
+  [Hit test within unscaled box]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transitions/Document-getAnimations.tentative.html.ini b/tests/wpt/metadata/css/css-transitions/Document-getAnimations.tentative.html.ini
index b658c6f6b5f..d5a4fbdfeb2 100644
--- a/tests/wpt/metadata/css/css-transitions/Document-getAnimations.tentative.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/Document-getAnimations.tentative.html.ini
@@ -11,3 +11,6 @@
   [Transitions are not returned after they have finished]
     expected: FAIL
 
+  [CSS Transitions targetting (pseudo-)elements should have correct order after sorting (::marker)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transitions/non-rendered-element-004.tentative.html.ini b/tests/wpt/metadata/css/css-transitions/non-rendered-element-004.tentative.html.ini
new file mode 100644
index 00000000000..4f24c094b1e
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transitions/non-rendered-element-004.tentative.html.ini
@@ -0,0 +1,4 @@
+[non-rendered-element-004.tentative.html]
+  [Transitions on ::marker pseudo-elements are canceled when the parent display type is no longer list-item]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
index c884dc82eab..628b1fab770 100644
--- a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
@@ -2,6 +2,3 @@
   [listeners are called when <iframe> is resized]
     expected: FAIL
 
-  [listeners are called correct number of times]
-    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-iframes.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
index 171592fc08f..6ef8bb1049f 100644
--- a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
@@ -2,3 +2,6 @@
   [elementsFromPoint on the root document for points in iframe elements]
     expected: FAIL
 
+  [elementsFromPoint on inner documents]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
new file mode 100644
index 00000000000..e181af5397f
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
@@ -0,0 +1,4 @@
+[elementsFromPoint-invalid-cases.html]
+  [The root element is the last element returned for otherwise empty queries within the viewport]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/selectors/attribute-selectors/style-attribute-selector.html.ini b/tests/wpt/metadata/css/selectors/attribute-selectors/style-attribute-selector.html.ini
new file mode 100644
index 00000000000..1fcadf7682c
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/attribute-selectors/style-attribute-selector.html.ini
@@ -0,0 +1,34 @@
+[style-attribute-selector.html]
+  [Match style attribute with no value]
+    expected: FAIL
+
+  [Dynamically remove style with Element.style]
+    expected: FAIL
+
+  [Match style attribute with empty value]
+    expected: FAIL
+
+  [Dynamically change style with Element.style]
+    expected: FAIL
+
+  [Dynamically change style with Element.style.property]
+    expected: FAIL
+
+  [Match style attribute with background value]
+    expected: FAIL
+
+  [Initially no style attribute to match]
+    expected: FAIL
+
+  [Dynamically remove style with Element.style.removeProperty]
+    expected: FAIL
+
+  [Dynamically change style with Element.setAttribute]
+    expected: FAIL
+
+  [Dynamically remove style with Element.style.property]
+    expected: FAIL
+
+  [Dynamically remove style with Element.removeAttribute]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/custom-elements/reactions/HTMLMediaElement.html.ini b/tests/wpt/metadata/custom-elements/reactions/HTMLMediaElement.html.ini
deleted file mode 100644
index 2ca05f57bb0..00000000000
--- a/tests/wpt/metadata/custom-elements/reactions/HTMLMediaElement.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[HTMLMediaElement.html]
-  expected: TIMEOUT
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 d5c2bfe8a7e..bb8ba7c6ad9 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,24 +312,18 @@
   [fetch(): separate response Content-Type: text/plain ]
     expected: NOTRUN
 
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
-    expected: FAIL
-
-  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
+  [<iframe>: combined response Content-Type: text/html */*]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html */*]
+  [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
+  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index 5c001592859..279734168dc 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -56,6 +56,6 @@
   [separate text/javascript x/x]
     expected: FAIL
 
-  [separate text/javascript;charset=windows-1252 error text/javascript]
+  [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_5.html.ini
deleted file mode 100644
index dc2e45516de..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_5.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html.ini
index 7eadac021e8..f1db5900b81 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-multi-channels.html.ini
@@ -20,3 +20,6 @@
   [X Rendered audio for channel 5 does not equal [0,0.0626220703125,0.125030517578125,0.18695068359375,0.24810791015625,0.308319091796875,0.3673095703125,0.42486572265625,0.480743408203125,0.53472900390625,0.58660888671875,0.636199951171875,0.68328857421875,0.727691650390625,0.76922607421875,0.8077392578125...\] with an element-wise tolerance of {"absoluteThreshold":0.000030517578125,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[1\]\t3.6732959747314453e-1\t6.2622070312500000e-2\t3.0470752716064453e-1\t4.8658168859649127e+0\t3.0517578125000000e-5\n\t[2\]\t6.8329977989196777e-1\t1.2503051757812500e-1\t5.5826926231384277e-1\t4.4650639949963384e+0\t3.0517578125000000e-5\n\t[3\]\t9.0373212099075317e-1\t1.8695068359375000e-1\t7.1678143739700317e-1\t3.8340669508039502e+0\t3.0517578125000000e-5\n\t[4\]\t9.9780619144439697e-1\t2.4810791015625000e-1\t7.4969828128814697e-1\t3.0216621502152523e+0\t3.0517578125000000e-5\n\t[5\]\t9.5236867666244507e-1\t3.0831909179687500e-1\t6.4404958486557007e-1\t2.0889059484187866e+0\t3.0517578125000000e-5\n\t...and 44036 more errors.\n\tMax AbsError of 1.9962286949157715e+0 at index of 32177.\n\t[32177\]\t9.9879217147827148e-1\t-9.9743652343750000e-1\t1.9962286949157715e+0\t2.0013591321441684e+0\t3.0517578125000000e-5\n\tMax RelError of Infinity at index of 21168.\n\t[21168\]\t9.5105654001235962e-1\t0.0000000000000000e+0\t9.5105654001235962e-1\tInfinity\t3.0517578125000000e-5\n]
     expected: FAIL
 
+  [X Rendered audio for channel 5 does not equal [0,0.0626220703125,0.125030517578125,0.18695068359375,0.24810791015625,0.308319091796875,0.3673095703125,0.42486572265625,0.480743408203125,0.53472900390625,0.58660888671875,0.636199951171875,0.68328857421875,0.727691650390625,0.76922607421875,0.8077392578125...\] with an element-wise tolerance of {"absoluteThreshold":0.000030517578125,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[1\]\t3.6732959747314453e-1\t6.2622070312500000e-2\t3.0470752716064453e-1\t4.8658168859649127e+0\t3.0517578125000000e-5\n\t[2\]\t6.8329977989196777e-1\t1.2503051757812500e-1\t5.5826926231384277e-1\t4.4650639949963384e+0\t3.0517578125000000e-5\n\t[3\]\t9.0373212099075317e-1\t1.8695068359375000e-1\t7.1678143739700317e-1\t3.8340669508039502e+0\t3.0517578125000000e-5\n\t[4\]\t9.9780619144439697e-1\t2.4810791015625000e-1\t7.4969828128814697e-1\t3.0216621502152523e+0\t3.0517578125000000e-5\n\t[5\]\t9.5236867666244507e-1\t3.0831909179687500e-1\t6.4404958486557007e-1\t2.0889059484187866e+0\t3.0517578125000000e-5\n\t...and 44048 more errors.\n\tMax AbsError of 1.9986916780471802e+0 at index of 29020.\n\t[29020\]\t9.9994289875030518e-1\t-9.9874877929687500e-1\t1.9986916780471802e+0\t2.0011956154322119e+0\t3.0517578125000000e-5\n\tMax RelError of Infinity at index of 10584.\n\t[10584\]\t-5.8778524398803711e-1\t0.0000000000000000e+0\t5.8778524398803711e-1\tInfinity\t3.0517578125000000e-5\n]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
index 873f6179f2c..06f0da3d734 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@@ -146,3 +146,9 @@
   [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[19030\]\t1.0053343057791861e+29\t-7.3546999692916870e-1\t1.0053343057791861e+29\t1.3669276924643975e+29\t3.8985999999999999e-3\n\t[19031\]\t-3.6017334461212158e-1\t-6.9157749414443970e-1\t3.3140414953231812e-1\t4.7920030992665957e-1\t3.8985999999999999e-3\n\t[38059\]\t1.9958413252754581e+29\t-9.8956179618835449e-1\t1.9958413252754581e+29\t2.0168940767147069e+29\t3.8985999999999999e-3\n\t[38060\]\t-8.8409073650836945e-2\t-9.9664616584777832e-1\t9.0823709219694138e-1\t9.1129341918891205e-1\t3.8985999999999999e-3\n\tMax AbsError of 1.9958413252754581e+29 at index of 38059.\n\tMax RelError of 2.0168940767147069e+29 at index of 38059.\n]
     expected: FAIL
 
+  [X SNR (39.52349713035221 dB) is not greater than or equal to 65.737. Got 39.52349713035221.]
+    expected: FAIL
+
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[19030\]\t-6.4853054482227890e-8\t-7.3546999692916870e-1\t7.3546993207611422e-1\t9.9999991182093795e-1\t3.8985999999999999e-3\n\t[19031\]\t-3.6017334461212158e-1\t-6.9157749414443970e-1\t3.3140414953231812e-1\t4.7920030992665957e-1\t3.8985999999999999e-3\n\t[38059\]\t-1.5015864107681409e-7\t-9.8956179618835449e-1\t9.8956164602971342e-1\t9.9999984825743915e-1\t3.8985999999999999e-3\n\t[38060\]\t-8.8409073650836945e-2\t-9.9664616584777832e-1\t9.0823709219694138e-1\t9.1129341918891205e-1\t3.8985999999999999e-3\n\tMax AbsError of 9.8956164602971342e-1 at index of 38059.\n\tMax RelError of 9.9999991182093795e-1 at index of 19030.\n]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html.ini
new file mode 100644
index 00000000000..6927027d6cc
--- /dev/null
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html.ini
@@ -0,0 +1,28 @@
+[k-rate-connections.html]
+  [X pan[256:384\]: Expected 0.5987244248390198 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.6529694199562073\n\t[1\]\t0.6529694199562073\n\t[2\]\t0.6529694199562073\n\t[3\]\t0.6529694199562073\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X pan[768:896\]: Expected 0.6674262881278992 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.6533852815628052\n\t[1\]\t0.6533852815628052\n\t[2\]\t0.6533852815628052\n\t[3\]\t0.6533852815628052\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X pan[896:1024\]: Expected 0.598724365234375 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.5880131721496582\n\t[1\]\t0.5880131721496582\n\t[2\]\t0.5880131721496582\n\t[3\]\t0.5880131721496582\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X pan[384:512\]: Expected 0.6674262881278992 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.6933872699737549\n\t[1\]\t0.6933872699737549\n\t[2\]\t0.6933872699737549\n\t[3\]\t0.6933872699737549\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X pan[512:640\]: Expected 0.7026606798171997 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.7071065902709961\n\t[1\]\t0.7071065902709961\n\t[2\]\t0.7071065902709961\n\t[3\]\t0.7071065902709961\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [< [StereoPanner\] 7 out of 8 assertions were failed.]
+    expected: FAIL
+
+  [X pan[640:768\]: Expected 0.7026606202125549 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.6935992240905762\n\t[1\]\t0.6935992240905762\n\t[2\]\t0.6935992240905762\n\t[3\]\t0.6935992240905762\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X pan[128:256\]: Expected 0.5 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0.5874094367027283\n\t[1\]\t0.5874094367027283\n\t[2\]\t0.5874094367027283\n\t[3\]\t0.5874094367027283\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [# AUDIT TASK RUNNER FINISHED: 1 out of 2 tasks were failed.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html.ini
new file mode 100644
index 00000000000..02ee2f7b584
--- /dev/null
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html.ini
@@ -0,0 +1,28 @@
+[k-rate-constant-source.html]
+  [< [ConstantSourceNode.offset k-rate automation\] 7 out of 8 assertions were failed.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[640:768\]: Expected 639.6246337890625 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t585.1428833007812\n\t[1\]\t585.1428833007812\n\t[2\]\t585.1428833007812\n\t[3\]\t585.1428833007812\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[896:1024\]: Expected 895.8748779296875 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t877.7142944335938\n\t[1\]\t877.7142944335938\n\t[2\]\t877.7142944335938\n\t[3\]\t877.7142944335938\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[512:640\]: Expected 511.49951171875 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t438.8571472167969\n\t[1\]\t438.8571472167969\n\t[2\]\t438.8571472167969\n\t[3\]\t438.8571472167969\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[128:256\]: Expected 127.1241455078125 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t0\n\t[1\]\t0\n\t[2\]\t0\n\t[3\]\t0\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[256:384\]: Expected 255.249267578125 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t146.2857208251953\n\t[1\]\t146.2857208251953\n\t[2\]\t146.2857208251953\n\t[3\]\t146.2857208251953\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[384:512\]: Expected 383.3743896484375 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t292.5714416503906\n\t[1\]\t292.5714416503906\n\t[2\]\t292.5714416503906\n\t[3\]\t292.5714416503906\n\t...and 124 more errors.]
+    expected: FAIL
+
+  [# AUDIT TASK RUNNER FINISHED: 1 out of 3 tasks were failed.]
+    expected: FAIL
+
+  [X k-rate ConstantSource.offset:  output[768:896\]: Expected 767.749755859375 for all values but found 128 unexpected values: \n\tIndex\tActual\n\t[0\]\t731.4285888671875\n\t[1\]\t731.4285888671875\n\t[2\]\t731.4285888671875\n\t[3\]\t731.4285888671875\n\t...and 124 more errors.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
index 064cf47545b..064cf47545b 100644
--- a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
+++ b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
new file mode 100644
index 00000000000..663a1f8fa30
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
@@ -0,0 +1,5 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/web-platform-tests/css/construct-stylesheets/META.yml b/tests/wpt/web-platform-tests/css/construct-stylesheets/META.yml
new file mode 100644
index 00000000000..9ffc2c606c6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/construct-stylesheets/META.yml
@@ -0,0 +1,5 @@
+spec: https://wicg.github.io/construct-stylesheets/
+suggested_reviewers:
+  - ericwilligers
+  - rakina
+  - tabatkins
diff --git a/tests/wpt/web-platform-tests/css/construct-stylesheets/idlharness.html b/tests/wpt/web-platform-tests/css/construct-stylesheets/idlharness.html
new file mode 100644
index 00000000000..85de760d6c7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/construct-stylesheets/idlharness.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<title>Constructable Stylesheet Objects IDL tests</title>
+<link rel="help" href="https://wicg.github.io/construct-stylesheets/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/WebIDLParser.js"></script>
+<script src="/resources/idlharness.js"></script>
+<div id="shadowHost"></div>
+<script>
+  'use strict';
+
+  idl_test(
+    ['construct-stylesheets'],
+    ['cssom', 'dom'],
+    idl_array => {
+      idl_array.add_objects({
+        CSSStyleSheet: ['new CSSStyleSheet()'],
+        Document: ['document'],
+        ShadowRoot: ['shadowRoot'],
+      });
+      const shadowHost = document.getElementById('shadowHost');
+      self.shadowRoot = shadowHost.attachShadow({mode: 'open'});
+    }
+  );
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/Document-getAnimations.tentative.html b/tests/wpt/web-platform-tests/css/css-animations/Document-getAnimations.tentative.html
index 4a9768a8b61..b3108759d86 100644
--- a/tests/wpt/web-platform-tests/css/css-animations/Document-getAnimations.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-animations/Document-getAnimations.tentative.html
@@ -262,83 +262,88 @@ test(t => {
                 'returned');
 }, 'CSS Animations canceled and restarted via the API are returned');
 
-test(t => {
-  // Create two divs with the following arrangement:
-  //
-  //       parent
-  //    (::marker,)
-  //     ::before,
-  //     ::after
-  //        |
-  //       child
-
-  addStyle(t, {
-    '#parent::after': "content: ''; animation: animLeft 100s;",
-    '#parent::before': "content: ''; animation: animRight 100s;",
-  });
+function pseudoTest(description, testMarkerPseudos) {
+  test(t => {
+    // Create two divs with the following arrangement:
+    //
+    //       parent
+    //    (::marker,)  // Optionally
+    //     ::before,
+    //     ::after
+    //        |
+    //       child
 
-  const supportsMarkerPseudos = CSS.supports('selector(::marker)');
-  if (supportsMarkerPseudos) {
     addStyle(t, {
-      '#parent': 'display: list-item;',
-      '#parent::marker': "content: ''; animation: animLeft 100s;",
+      '#parent::after': "content: ''; animation: animLeft 100s;",
+      '#parent::before': "content: ''; animation: animRight 100s;",
     });
-  }
-
-  const parent = addDiv(t, { id: 'parent' });
-  const child = addDiv(t);
-  parent.appendChild(child);
-  for (const div of [parent, child]) {
-    div.setAttribute('style', 'animation: animBottom 100s');
-  }
-
-  const expectedAnimations = [
-    [parent, undefined],
-    [parent, '::marker'],
-    [parent, '::before'],
-    [parent, '::after'],
-    [child, undefined],
-  ];
-  if (!supportsMarkerPseudos) {
-    expectedAnimations.splice(1, 1);
-  }
 
-  const animations = document.getAnimations();
-  assert_equals(
-    animations.length,
-    expectedAnimations.length,
-    'CSS animations on both pseudo-elements and elements are returned'
-  );
-
-  for (const [index, expected] of expectedAnimations.entries()) {
-    const [element, pseudo] = expected;
-    const actual = animations[index];
-
-    if (pseudo) {
-      assert_equals(
-        actual.effect.target,
-        element,
-        `Animation #${index + 1} has expected target`
-      );
-      assert_equals(
-        actual.effect.pseudoElement,
-        pseudo,
-        `Animation #${index + 1} has expected pseudo type`
-      );
-    } else {
-      assert_equals(
-        actual.effect.target,
-        element,
-        `Animation #${index + 1} has expected target`
-      );
-      assert_equals(
-        actual.effect.pseudoElement,
-        null,
-        `Animation #${index + 1} has null pseudo type`
-      );
+    if (testMarkerPseudos) {
+      addStyle(t, {
+        '#parent': 'display: list-item;',
+        '#parent::marker': "content: ''; animation: animLeft 100s;",
+      });
+    }
+
+    const parent = addDiv(t, { id: 'parent' });
+    const child = addDiv(t);
+    parent.appendChild(child);
+    for (const div of [parent, child]) {
+      div.setAttribute('style', 'animation: animBottom 100s');
     }
-  }
-}, 'CSS Animations targetting (pseudo-)elements should have correct order '
-   + 'after sorting');
+
+    const expectedAnimations = [
+      [parent, undefined],
+      [parent, '::marker'],
+      [parent, '::before'],
+      [parent, '::after'],
+      [child, undefined],
+    ];
+    if (!testMarkerPseudos) {
+      expectedAnimations.splice(1, 1);
+    }
+
+    const animations = document.getAnimations();
+    assert_equals(
+      animations.length,
+      expectedAnimations.length,
+      'CSS animations on both pseudo-elements and elements are returned'
+    );
+
+    for (const [index, expected] of expectedAnimations.entries()) {
+      const [element, pseudo] = expected;
+      const actual = animations[index];
+
+      if (pseudo) {
+        assert_equals(
+          actual.effect.target,
+          element,
+          `Animation #${index + 1} has expected target`
+        );
+        assert_equals(
+          actual.effect.pseudoElement,
+          pseudo,
+          `Animation #${index + 1} has expected pseudo type`
+        );
+      } else {
+        assert_equals(
+          actual.effect.target,
+          element,
+          `Animation #${index + 1} has expected target`
+        );
+        assert_equals(
+          actual.effect.pseudoElement,
+          null,
+          `Animation #${index + 1} has null pseudo type`
+        );
+      }
+    }
+  }, description);
+}
+
+pseudoTest('CSS Animations targetting (pseudo-)elements should have correct '
+     + 'order after sorting', false);
+pseudoTest('CSS Animations targetting (pseudo-)elements should have correct '
+     + 'order after sorting (::marker)', true);
 
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/event-order.tentative.html b/tests/wpt/web-platform-tests/css/css-animations/event-order.tentative.html
index f4f9e29a3c8..58f0bb67caf 100644
--- a/tests/wpt/web-platform-tests/css/css-animations/event-order.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-animations/event-order.tentative.html
@@ -129,62 +129,68 @@ promise_test(async t => {
                       ['animationend', div2, 200]);
 }, 'Same events are ordered by elements');
 
-promise_test(async t => {
-  // Setup a hierarchy as follows:
-  //
-  //              parent
-  //                |
-  //  (::marker, ::before, ::after)
-  //                |
-  //              child
-  const parentDiv = addDiv(t, { style: 'animation: anim 100s' });
-
-  parentDiv.id = 'parent-div';
-  addStyle(t, {
-    '#parent-div::after': "content: ''; animation: anim 100s",
-    '#parent-div::before': "content: ''; animation: anim 100s",
-  });
-
-  if (CSS.supports('selector(::marker)')) {
-    parentDiv.style.display = 'list-item';
+function pseudoTest(description, testMarkerPseudos) {
+  promise_test(async t => {
+    // Setup a hierarchy as follows:
+    //
+    //              parent
+    //                |
+    //  (::marker, ::before, ::after) // ::marker optional
+    //                |
+    //              child
+    const parentDiv = addDiv(t, { style: 'animation: anim 100s' });
+
+    parentDiv.id = 'parent-div';
     addStyle(t, {
-      '#parent-div::marker': "content: ''; animation: color-anim 100s",
+      '#parent-div::after': "content: ''; animation: anim 100s",
+      '#parent-div::before': "content: ''; animation: anim 100s",
     });
-  }
 
-  const childDiv = addDiv(t, { style: 'animation: anim 100s' });
-  parentDiv.append(childDiv);
-
-  // Setup event handlers
-  let events = [];
-  for (const name of ['start', 'iteration', 'end', 'cancel']) {
-    parentDiv['onanimation' + name] = evt => {
-      events.push({
-        type: evt.type,
-        target: evt.target,
-        pseudoElement: evt.pseudoElement,
-        elapsedTime: evt.elapsedTime,
+    if (testMarkerPseudos) {
+      parentDiv.style.display = 'list-item';
+      addStyle(t, {
+        '#parent-div::marker': "content: ''; animation: color-anim 100s",
       });
-    };
-  }
-
-  // Wait a couple of frames for the events to be dispatched
-  await waitForFrame();
-  await waitForFrame();
-
-  const expectedEvents = [
-    ['animationstart', parentDiv, 0],
-    ['animationstart', parentDiv, '::marker', 0],
-    ['animationstart', parentDiv, '::before', 0],
-    ['animationstart', parentDiv, '::after', 0],
-    ['animationstart', childDiv, 0],
-  ];
-  if (!CSS.supports('selector(::marker)')) {
-    expectedEvents.splice(1, 1);
-  }
+    }
+
+    const childDiv = addDiv(t, { style: 'animation: anim 100s' });
+    parentDiv.append(childDiv);
+
+    // Setup event handlers
+    let events = [];
+    for (const name of ['start', 'iteration', 'end', 'cancel']) {
+      parentDiv['onanimation' + name] = evt => {
+        events.push({
+          type: evt.type,
+          target: evt.target,
+          pseudoElement: evt.pseudoElement,
+          elapsedTime: evt.elapsedTime,
+        });
+      };
+    }
+
+    // Wait a couple of frames for the events to be dispatched
+    await waitForFrame();
+    await waitForFrame();
+
+    const expectedEvents = [
+      ['animationstart', parentDiv, 0],
+      ['animationstart', parentDiv, '::marker', 0],
+      ['animationstart', parentDiv, '::before', 0],
+      ['animationstart', parentDiv, '::after', 0],
+      ['animationstart', childDiv, 0],
+    ];
+    if (!testMarkerPseudos) {
+      expectedEvents.splice(1, 1);
+    }
+
+    checkEvents(events, ...expectedEvents);
+  }, description);
+}
 
-  checkEvents(events, ...expectedEvents);
-}, 'Same events on pseudo-elements follow the prescribed order');
+pseudoTest('Same events on pseudo-elements follow the prescribed order', false);
+pseudoTest('Same events on pseudo-elements follow the prescribed order ' +
+    '(::marker)', true);
 
 promise_test(async t => {
   let events = [];
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2-ref.html b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2-ref.html
new file mode 100644
index 00000000000..d3165b681c8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2-ref.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+     <head>
+        <title>CSS Reference file</title>
+        <meta charset="utf-8" />
+        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+        <style type="text/css">
+            div {
+              /* use Ahem font which has no italic/oblique face, so that the oblique
+                 will be synthesized with the given angle */
+              font: 50px/1 Ahem;
+              position: absolute;
+            }
+            /* test elements will use Ahem with various values of obliqueness */
+            .test {
+              writing-mode: vertical-rl;
+              -webkit-text-orientation: upright;
+              text-orientation: upright;
+              color: green;
+            }
+            #test1 {
+              font-style: oblique 14deg;
+              top: 100px;
+              left: 100px;
+            }
+            #test2 {
+              font-style: oblique -45deg;
+              top: 100px;
+              left: 200px;
+            }
+        </style>
+    </head>
+    <body>
+        <p>Test passes if no red shows, just two sheared green blocks:</p>
+        <div id=test1 class=test>ABC</div>
+        <div id=test2 class=test>ABC</div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2.html b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2.html
new file mode 100644
index 00000000000..6e8910e22c8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-2.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<html>
+     <head>
+        <title>CSS Test: Test for synthetic italics in vertical upright mode</title>
+        <meta charset="utf-8" />
+        <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com" />
+        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+        <link rel="match" href="test-synthetic-italic-2-ref.html">
+        <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/2869#issuecomment-402034497"/>
+        <meta name="assert" content="Synthetic italics in vertical upright mode should skew vertically" />
+        <style type="text/css">
+            div {
+              /* use Ahem font which has no italic/oblique face, so that the oblique
+                 will be synthesized with the given angle */
+              font: 50px/1 Ahem;
+              position: absolute;
+            }
+            /* test elements will use Ahem with various values of obliqueness */
+            .test {
+              writing-mode: vertical-rl;
+              -webkit-text-orientation: upright;
+              text-orientation: upright;
+              color: green;
+            }
+            #test1 {
+              font-style: oblique 14deg;
+              top: 100px;
+              left: 100px;
+            }
+            #test2 {
+              font-style: oblique -45deg;
+              top: 100px;
+              left: 200px;
+            }
+            /* create a set of background shapes that should be entirely covered by the
+               appropriately sheared Ahem glyphs in the test elements */
+            .bg {
+              width: 50px;
+              height: 150px;
+            }
+            .inner {
+              /* we shrink the inner red shape slightly to try and avoid pixels
+                 "bleeding through" around antialiased glyph edges */
+              margin: 2px;
+              width: calc(100% - 4px);
+              height: calc(100% - 4px);
+              background-color: red;
+            }
+            #bg1 {
+              top: 100px;
+              left: 100px;
+              transform: skewY(14deg);
+            }
+            #bg2 {
+              top: 100px;
+              left: 200px;
+              transform: skewY(-45deg);
+            }
+        </style>
+    </head>
+    <body>
+        <p>Test passes if no red shows, just two sheared green blocks:</p>
+        <div id=bg1 class=bg><div class=inner></div></div>
+        <div id=bg2 class=bg><div class=inner></div></div>
+        <div id=test1 class=test>ABC</div>
+        <div id=test2 class=test>ABC</div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3-ref.html b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3-ref.html
new file mode 100644
index 00000000000..a0721426016
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3-ref.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+     <head>
+        <title>CSS Reference file</title>
+        <meta charset="utf-8" />
+        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+        <style type="text/css">
+            div {
+              /* use Ahem font which has no italic/oblique face, so that the oblique
+                 will be synthesized with the given angle */
+              font: 50px/1 Ahem;
+              position: absolute;
+            }
+            /* test elements will use Ahem with various values of obliqueness */
+            .test {
+              writing-mode: vertical-rl;
+              -webkit-text-orientation: upright;
+              text-orientation: upright;
+              color: green;
+            }
+            /* check that the sheared glyphs are still correct when transforms are
+               also in effect */
+            #test3 {
+              font-style: oblique 25deg;
+              top: 150px;
+              left: 100px;
+              transform: scale(1.5) rotate(45deg) skew(30deg);
+            }
+        </style>
+    </head>
+    <body>
+        <p>Test passes if no red shows, just a sheared green block:</p>
+        <div id=test3 class=test>ABC</div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3.html b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3.html
new file mode 100644
index 00000000000..f3c1a371562
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-fonts/test-synthetic-italic-3.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html>
+     <head>
+        <title>CSS Test: Test for synthetic italics in vertical upright mode</title>
+        <meta charset="utf-8" />
+        <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com" />
+        <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+        <link rel="match" href="test-synthetic-italic-3-ref.html">
+        <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/2869#issuecomment-402034497"/>
+        <meta name="assert" content="Synthetic italics in vertical upright mode should skew vertically" />
+        <style type="text/css">
+            div {
+              /* use Ahem font which has no italic/oblique face, so that the oblique
+                 will be synthesized with the given angle */
+              font: 50px/1 Ahem;
+              position: absolute;
+            }
+            /* test elements will use Ahem with various values of obliqueness */
+            .test {
+              writing-mode: vertical-rl;
+              -webkit-text-orientation: upright;
+              text-orientation: upright;
+              color: green;
+            }
+            /* check that the sheared glyphs are still correct when transforms are
+               also in effect */
+            #test3 {
+              font-style: oblique 25deg;
+              top: 150px;
+              left: 100px;
+              transform: scale(1.5) rotate(45deg) skew(30deg);
+            }
+            /* create a set of background shapes that should be entirely covered by the
+               appropriately sheared Ahem glyphs in the test elements */
+            .bg {
+              width: 50px;
+              height: 150px;
+            }
+            .inner {
+              /* we shrink the inner red shape slightly to try and avoid pixels
+                 "bleeding through" around antialiased glyph edges */
+              margin: 2px;
+              width: calc(100% - 4px);
+              height: calc(100% - 4px);
+              background-color: red;
+            }
+            #bg3 {
+              top: 150px;
+              left: 100px;
+              /* same transform as the test element, plus skewY for the oblique */
+              transform: scale(1.5) rotate(45deg) skew(30deg) skewY(25deg);
+            }
+        </style>
+    </head>
+    <body>
+        <p>Test passes if no red shows, just a sheared green block:</p>
+        <div id=bg3 class=bg><div class=inner></div></div>
+        <div id=test3 class=test>ABC</div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-000.html b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-000.html
new file mode 100644
index 00000000000..227b9148a38
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-000.html
@@ -0,0 +1,120 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Paged Media: parsing @page declarations</title>
+<link rel="author" title="Felipe Erias Morandeira" href="mailto:felipeerias@gmail.com"/>
+<link rel="help" href="https://drafts.csswg.org/css-page/#at-page-rule"/>
+<meta name="assert" content="Test that @page declarations are parsed correctly.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style type="text/css">
+
+    @page :visited { /* :visited is invalid for @page */
+        color: red;
+    }
+    @page a_page_name:visited { /* :visited is invalid for @page */
+        background-color: red;
+    }
+    @page {
+        margin-top:5cm;
+        margin-bottom:10cm;
+    }
+    @page :left {
+        margin-right:3cm;
+    }
+    @page :right {
+        margin-left:3cm;
+    }
+    @page :first {
+        border-width:1px;
+    }
+    @page hello {
+        color:green;
+    }
+    @page world:right {
+        background-color:green;
+    }
+    @page auto_page {
+        size: auto;
+    }
+    @page square_page {
+        size: 4in;
+    }
+    @page letter_page {
+        size: letter;
+    }
+    @page page_width_height {
+        size: 10cm 15cm;
+    }
+    @page page_size_orientation {
+        size: ledger landscape;
+    }
+    @page page_orientation_size {
+        size: portrait a4;
+    }
+    @page page_jis_size_orientation {
+        size: jis-b5 portrait;
+    }
+    @page page_orientation_jis_size {
+        size: landscape jis-b4;
+    }
+    @page err_empty_size {
+        size:;
+    }
+    @page err_unknow_page_size {
+        size: yotsugiri;
+    }
+    @page err_length_and_page_size {
+        size: 10cm letter;
+    }
+    @page err_length_and_orientation {
+        size: 10cm landscape;
+    }
+    @page err_orientations {
+        size: portrait landscape;
+    }
+    @page err_too_many_params {
+        size: a5 landscape auto;
+    }
+
+</style>
+<script type="text/javascript">
+
+    test(function(){
+        let expectedForSelector = {
+            "" : "margin-top: 5cm; margin-bottom: 10cm;",
+            ":left" : "margin-right: 3cm;",
+            ":right" : "margin-left: 3cm;",
+            ":first" : "border-width: 1px;",
+            "hello" : "color: green;",
+            "world:right" : "background-color: green;",
+            "auto_page" : "size: auto;",
+            "square_page" : "size: 4in;",
+            "letter_page" : "size: letter;",
+            "page_width_height" : "size: 10cm 15cm;",
+            "page_size_orientation" : "size: ledger landscape;",
+            "page_orientation_size" : "size: a4 portrait;",
+            "page_jis_size_orientation" : "size: jis-b5 portrait;",
+            "page_orientation_jis_size" : "size: jis-b4 landscape;",
+            "err_empty_size" : "",
+            "err_unknow_page_size" : "",
+            "err_length_and_page_size" : "",
+            "err_length_and_orientation" : "",
+            "err_orientations" : "",
+            "err_too_many_params" : ""
+        };
+        let styleSheets = document.styleSheets;
+        for (let i = 0; i < styleSheets.length; i++) {
+            let rules = styleSheets[i].cssRules;
+            for (let rule of rules) {
+                if (rule.type == CSSRule.PAGE_RULE) {
+                    let expected = expectedForSelector[rule.selectorText];
+                    assert_equals(rule.style.cssText, expected, "unexpected @page contents");
+                    delete expectedForSelector[rule.selectorText];
+                }
+            }
+        }
+        assert_equals(Object.keys(expectedForSelector).length, 0, "missing @page selectors");
+    }, "test CSS @page declarations");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-001.html b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-001.html
new file mode 100644
index 00000000000..e57424029ba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-001.html
@@ -0,0 +1,55 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Paged Media: parsing @page declarations inside @media</title>
+<link rel="author" title="Felipe Erias Morandeira" href="mailto:felipeerias@gmail.com"/>
+<link rel="help" href="https://drafts.csswg.org/css-page/#at-page-rule"/>
+<meta name="assert" content="Test that @page declarations inside @media are parsed correctly.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style type="text/css">
+
+    @media print {
+        @page {
+            margin: 3cm;
+        }
+        @page :first {
+            margin-top: 6cm;
+        }
+        @page :left {
+            color: red;
+        }
+        @page :right {
+            color: blue;
+        }
+    }
+
+</style>
+<script type="text/javascript">
+
+    test(function(){
+        let expectedForSelector = {
+            "" : "margin: 3cm;",
+            ":first" : "margin-top: 6cm;",
+            ":left" : "color: red;",
+            ":right" : "color: blue;"
+        };
+        let styleSheets = document.styleSheets;
+        for (let i = 0; i < styleSheets.length; i++) {
+            let rules = styleSheets[i].cssRules;
+            for (let rule of rules) {
+                if (rule.type == CSSRule.MEDIA_RULE && rule.conditionText == 'print') {
+                    for (let mediaRule of rule.cssRules) {
+                        if (mediaRule.type == CSSRule.PAGE_RULE) {
+                            let expected = expectedForSelector[mediaRule.selectorText];
+                            assert_equals(mediaRule.style.cssText, expected, "unexpected @page contents");
+                            delete expectedForSelector[mediaRule.selectorText];
+                        }
+                    }
+                }
+            }
+        }
+        assert_equals(Object.keys(expectedForSelector).length, 0, "missing @page selectors in @media");
+    }, "test @page inside a @media print rule");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-002.html b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-002.html
new file mode 100644
index 00000000000..183072dec67
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-page/page-rule-declarations-002.html
@@ -0,0 +1,36 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Paged Media: parsing page properties inside HTML elements</title>
+<link rel="author" title="Felipe Erias Morandeira" href="mailto:felipeerias@gmail.com"/>
+<link rel="help" href="https://drafts.csswg.org/css-page/#using-named-pages"/>
+<meta name="assert" content="Test that page properties of HTML elements are parsed correctly.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+
+<style type="text/css">
+
+    @page {
+        size: a4;
+    }
+    @page small_page {
+        size: a5 portrait;
+    }
+    @page large_page {
+        size: a3 landscape;
+    }
+
+</style>
+<script type="text/javascript">
+
+    test(function(){
+        test_valid_value("page", "auto");
+        test_valid_value("page", "small_page");
+        test_valid_value("page", "large_page");
+        test_invalid_value("page", "auto small_page");
+        test_invalid_value("page", "large_page auto");
+        test_invalid_value("page", "small_page large_page");
+        test_invalid_value("page", "1cm");
+    }, "test page properties in HTML elements");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/shape-image/shape-image-024.html b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/shape-image/shape-image-024.html
index d6197e1f521..3ca0ba912b1 100644
--- a/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/shape-image/shape-image-024.html
+++ b/tests/wpt/web-platform-tests/css/css-shapes/shape-outside/shape-image/shape-image-024.html
@@ -20,7 +20,7 @@
           font: 100px/1 Ahem;
         }
         #test {
-            width: 200px;
+            width: 211px;
             color: rgb(0,100,0);
         }
         #image {
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/Document-getAnimations.tentative.html b/tests/wpt/web-platform-tests/css/css-transitions/Document-getAnimations.tentative.html
index cecddfaa401..cd97acfd5ec 100644
--- a/tests/wpt/web-platform-tests/css/css-transitions/Document-getAnimations.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-transitions/Document-getAnimations.tentative.html
@@ -35,94 +35,99 @@ test(t => {
                 'getAnimations returns no running CSS Transitions');
 }, 'getAnimations for CSS Transitions');
 
-test(t => {
-  // Create two divs with the following arrangement:
-  //
-  //       parent
-  //    (::marker,)
-  //     ::before,
-  //     ::after
-  //        |
-  //       child
-
-  addStyle(t, {
-    '.init::after': 'content: ""; width: 0px; transition: all 100s;',
-    '.init::before': 'content: ""; width: 0px; transition: all 100s;',
-    '.change::after': 'width: 100px;',
-    '.change::before': 'width: 100px;',
-  });
-
-  const supportsMarkerPseudos = CSS.supports('selector(::marker)');
-  if (supportsMarkerPseudos) {
+function pseudoTest(description, testMarkerPseudos) {
+  test(t => {
+    // Create two divs with the following arrangement:
+    //
+    //       parent
+    //    (::marker,) // Optionally
+    //     ::before,
+    //     ::after
+    //        |
+    //       child
+
     addStyle(t, {
-      '.init::marker': 'content: ""; color: red; transition: all 100s;',
-      '.change::marker': 'color: green;',
+      '.init::after': 'content: ""; width: 0px; transition: all 100s;',
+      '.init::before': 'content: ""; width: 0px; transition: all 100s;',
+      '.change::after': 'width: 100px;',
+      '.change::before': 'width: 100px;',
     });
-  }
-
-  const parent = addDiv(t, { 'style': 'display: list-item' });
-  const child = addDiv(t);
-  parent.appendChild(child);
-
-  parent.style.left = '0px';
-  parent.style.transition = 'left 100s';
-  parent.classList.add('init');
-  child.style.left = '0px';
-  child.style.transition = 'left 100s';
-  getComputedStyle(parent).left;
-
-  parent.style.left = '100px';
-  parent.classList.add('change');
-  child.style.left = '100px';
-
-  const expectedTransitions = [
-    [parent, undefined],
-    [parent, '::marker'],
-    [parent, '::before'],
-    [parent, '::after'],
-    [child, undefined],
-  ];
-  if (!supportsMarkerPseudos) {
-    expectedTransitions.splice(1, 1);
-  }
-
-  const transitions = document.getAnimations();
-  assert_equals(
-    transitions.length,
-    expectedTransitions.length,
-    'CSS transition on both pseudo-elements and elements are returned'
-  );
-
-  for (const [index, expected] of expectedTransitions.entries()) {
-    const [element, pseudo] = expected;
-    const actual = transitions[index];
-
-    if (pseudo) {
-      assert_equals(
-        actual.effect.target,
-        element,
-        `Transition #${index + 1} has expected target`
-      );
-      assert_equals(
-        actual.effect.pseudoElement,
-        pseudo,
-        `Transition #${index + 1} has expected pseudo type`
-      );
-    } else {
-      assert_equals(
-        actual.effect.target,
-        element,
-        `Transition #${index + 1} has expected target`
-      );
-      assert_equals(
-        actual.effect.pseudoElement,
-        null,
-        `Transition #${index + 1} has null pseudo type`
-      );
+
+    if (testMarkerPseudos) {
+      addStyle(t, {
+        '.init::marker': 'content: ""; color: red; transition: all 100s;',
+        '.change::marker': 'color: green;',
+      });
+    }
+
+    const parent = addDiv(t, { 'style': 'display: list-item' });
+    const child = addDiv(t);
+    parent.appendChild(child);
+
+    parent.style.left = '0px';
+    parent.style.transition = 'left 100s';
+    parent.classList.add('init');
+    child.style.left = '0px';
+    child.style.transition = 'left 100s';
+    getComputedStyle(parent).left;
+
+    parent.style.left = '100px';
+    parent.classList.add('change');
+    child.style.left = '100px';
+
+    const expectedTransitions = [
+      [parent, undefined],
+      [parent, '::marker'],
+      [parent, '::before'],
+      [parent, '::after'],
+      [child, undefined],
+    ];
+    if (!testMarkerPseudos) {
+      expectedTransitions.splice(1, 1);
+    }
+
+    const transitions = document.getAnimations();
+    assert_equals(
+      transitions.length,
+      expectedTransitions.length,
+      'CSS transition on both pseudo-elements and elements are returned'
+    );
+
+    for (const [index, expected] of expectedTransitions.entries()) {
+      const [element, pseudo] = expected;
+      const actual = transitions[index];
+
+      if (pseudo) {
+        assert_equals(
+          actual.effect.target,
+          element,
+          `Transition #${index + 1} has expected target`
+        );
+        assert_equals(
+          actual.effect.pseudoElement,
+          pseudo,
+          `Transition #${index + 1} has expected pseudo type`
+        );
+      } else {
+        assert_equals(
+          actual.effect.target,
+          element,
+          `Transition #${index + 1} has expected target`
+        );
+        assert_equals(
+          actual.effect.pseudoElement,
+          null,
+          `Transition #${index + 1} has null pseudo type`
+        );
+      }
     }
-  }
-}, 'CSS Transitions targetting (pseudo-)elements should have correct order '
-   + 'after sorting');
+  }, description);
+}
+
+pseudoTest('CSS Transitions targetting (pseudo-)elements should have correct '
+     + 'order after sorting', false)
+pseudoTest('CSS Transitions targetting (pseudo-)elements should have correct '
+     + 'order after sorting (::marker)', true)
 
 promise_test(async t => {
   const div = addDiv(t, { style: 'left: 0px; transition: all 50ms' });
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-002.html b/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-002.html
index f26a0489578..accf1410376 100644
--- a/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-002.html
+++ b/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-002.html
@@ -51,39 +51,6 @@ promise_test(async t => {
 }, 'Transitions on ::before/::after pseudo-elements are canceled when the'
    + ' content property is cleared');
 
-promise_test(async t => {
-  if (!CSS.supports('selector(::marker)')) {
-    return;
-  }
-
-  addStyle(t, {
-    '.init::marker': 'content: ""; color: red; transition: color 100s;',
-    '.change::marker': 'color: green',
-  });
-
-  // Create element (and pseudo-element) and attach event listeners
-  const div = addDiv(t, { 'style': 'display: list-item' });
-  div.classList.add('init');
-
-  const eventWatcher = new EventWatcher(t, div, [
-    'transitionrun',
-    'transitioncancel',
-  ]);
-
-  // Trigger transition
-  getComputedStyle(div).color;
-  div.classList.add('change');
-  getComputedStyle(div).color;
-
-  await eventWatcher.wait_for('transitionrun');
-
-  // Make the parent element no longer display: list-item so that the pseudo
-  // element no longer renders
-  div.style.display = 'block';
-
-  await eventWatcher.wait_for('transitioncancel');
-}, 'Transitions on ::marker pseudo-elements are canceled when the'
-   + ' parent display type is no longer list-item');
 </script>
 
 </body>
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-004.tentative.html b/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-004.tentative.html
new file mode 100644
index 00000000000..1fe2af1253d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transitions/non-rendered-element-004.tentative.html
@@ -0,0 +1,51 @@
+<!doctype html>
+<html>
+<head>
+<meta charset=utf-8>
+<title>CSS Transitions Test: Transitions do not run for a ::marker-element that is not being rendered</title>
+<link rel="help" title="Starting transitions"
+  href="https://drafts.csswg.org/css-transitions/#starting">
+
+<script src="/resources/testharness.js" type="text/javascript"></script>
+<script src="/resources/testharnessreport.js" type="text/javascript"></script>
+<script src="./support/helper.js" type="text/javascript"></script>
+
+</head>
+<body>
+<div id="log"></div>
+
+<script>
+
+promise_test(async t => {
+  addStyle(t, {
+    '.init::marker': 'content: ""; color: red; transition: color 100s;',
+    '.change::marker': 'color: green',
+  });
+
+  // Create element (and pseudo-element) and attach event listeners
+  const div = addDiv(t, { 'style': 'display: list-item' });
+  div.classList.add('init');
+
+  const eventWatcher = new EventWatcher(t, div, [
+    'transitionrun',
+    'transitioncancel',
+  ]);
+
+  // Trigger transition
+  getComputedStyle(div).color;
+  div.classList.add('change');
+  getComputedStyle(div).color;
+
+  await eventWatcher.wait_for('transitionrun');
+
+  // Make the parent element no longer display: list-item so that the pseudo
+  // element no longer renders
+  div.style.display = 'block';
+
+  await eventWatcher.wait_for('transitioncancel');
+}, 'Transitions on ::marker pseudo-elements are canceled when the'
+   + ' parent display type is no longer list-item');
+</script>
+
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/selectors/attribute-selectors/style-attribute-selector.html b/tests/wpt/web-platform-tests/css/selectors/attribute-selectors/style-attribute-selector.html
new file mode 100644
index 00000000000..83e8102c015
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/attribute-selectors/style-attribute-selector.html
@@ -0,0 +1,130 @@
+<!doctype html>
+<title>CSS Selectors Test: Tests the style attribute used in an attribute selector</title>
+<link rel="help" href="https://drafts.csswg.org/selectors/#attribute-selectors">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  #container { font-size: 16px; color: black; }
+  .test[style] { color: green }
+  .test[style=""] { font-size: 100px }
+  .test[style*="text-decoration"] { background-color: lime }
+  .test[style] + #sibling { color: green; }
+  .test[style*="text-decoration"] + #sibling { background-color: lime; }
+</style>
+<div id="container">
+  <div id="t1" class="test" style></div>
+  <div id="t2" class="test" style=""></div>
+  <div id="t3" class="test" style="text-decoration:underline"></div>
+  <div id="t4" class="test"></div>
+  <div id="sibling"></div>
+</div>
+<script>
+  const no_match_bgcolor = "rgba(0, 0, 0, 0)";
+  const no_match_color = "rgb(0, 0, 0)";
+  const no_match_font_size = "16px";
+  const match_bgcolor = "rgb(0, 255, 0)";
+  const match_color = "rgb(0, 128, 0)";
+  const match_font_size = "100px";
+
+  test(() => {
+    assert_equals(getComputedStyle(t1).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t1).color, match_color);
+    assert_equals(getComputedStyle(t1).fontSize, match_font_size);
+  }, "Match style attribute with no value");
+
+  test(() => {
+    assert_equals(getComputedStyle(t2).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t2).color, match_color);
+    assert_equals(getComputedStyle(t2).fontSize, match_font_size);
+  }, "Match style attribute with empty value");
+
+  test(() => {
+    assert_equals(getComputedStyle(t3).backgroundColor, match_bgcolor);
+    assert_equals(getComputedStyle(t3).color, match_color);
+    assert_equals(getComputedStyle(t3).fontSize, no_match_font_size);
+  }, "Match style attribute with background value");
+
+  test(() => {
+    assert_equals(getComputedStyle(t4).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, no_match_color);
+    assert_equals(getComputedStyle(t4).fontSize, no_match_font_size);
+    assert_equals(getComputedStyle(sibling).color, no_match_color);
+  }, "Initially no style attribute to match");
+
+  function reset_style(element) {
+    element.removeAttribute("style");
+    element.offsetTop;
+  }
+
+  function set_style(element) {
+    element.setAttribute("style", "text-decoration: underline");
+    element.offsetTop;
+  }
+
+  test(() => {
+    reset_style(t4);
+    t4.setAttribute("style", "text-decoration: underline");
+    assert_equals(getComputedStyle(t4).backgroundColor, match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, no_match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+  }, "Dynamically change style with Element.setAttribute");
+
+  test(() => {
+    reset_style(t4);
+    t4.style = "text-decoration: underline";
+    assert_equals(getComputedStyle(t4).backgroundColor, match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, no_match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+  }, "Dynamically change style with Element.style");
+
+  test(() => {
+    reset_style(t4);
+    t4.style.textDecoration = "underline";
+    assert_equals(getComputedStyle(t4).backgroundColor, match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, no_match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+  }, "Dynamically change style with Element.style.property");
+
+  test(() => {
+    set_style(t4);
+    t4.removeAttribute("style");
+    assert_equals(getComputedStyle(t4).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, no_match_color);
+    assert_equals(getComputedStyle(t4).fontSize, no_match_font_size);
+    assert_equals(getComputedStyle(sibling).color, no_match_color);
+    assert_equals(getComputedStyle(sibling).backgroundColor, no_match_bgcolor);
+  }, "Dynamically remove style with Element.removeAttribute");
+
+  test(() => {
+    set_style(t4);
+    t4.style = "";
+    assert_equals(getComputedStyle(t4).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+    assert_equals(getComputedStyle(sibling).backgroundColor, no_match_bgcolor);
+  }, "Dynamically remove style with Element.style");
+
+  test(() => {
+    set_style(t4);
+    t4.style.textDecoration = "";
+    assert_equals(getComputedStyle(t4).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+    assert_equals(getComputedStyle(sibling).backgroundColor, no_match_bgcolor);
+  }, "Dynamically remove style with Element.style.property");
+
+  test(() => {
+    set_style(t4);
+    t4.style.removeProperty("text-decoration");
+    assert_equals(getComputedStyle(t4).backgroundColor, no_match_bgcolor);
+    assert_equals(getComputedStyle(t4).color, match_color);
+    assert_equals(getComputedStyle(t4).fontSize, match_font_size);
+    assert_equals(getComputedStyle(sibling).color, match_color);
+    assert_equals(getComputedStyle(sibling).backgroundColor, no_match_bgcolor);
+  }, "Dynamically remove style with Element.style.removeProperty");
+</script>
diff --git a/tests/wpt/web-platform-tests/dom/events/scrolling/input-text-scroll-event-when-using-arrow-keys.html b/tests/wpt/web-platform-tests/dom/events/scrolling/input-text-scroll-event-when-using-arrow-keys.html
new file mode 100644
index 00000000000..f84e4465275
--- /dev/null
+++ b/tests/wpt/web-platform-tests/dom/events/scrolling/input-text-scroll-event-when-using-arrow-keys.html
@@ -0,0 +1,71 @@
+<!doctype html>
+<html>
+<head>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+</head>
+<body onload=runTest()>
+    <p>Moving the cursor using the arrow keys into an
+        input element fires scroll events when text has to scroll into view.
+        Uses arrow keys to move forward and backwards in the input
+        element.</p>
+    <input type="text" style='width: 50px'
+    value="Fooooooooooooooooooooooooooooooooooooooooooooooooo"/>
+    <textarea rows="4" cols="4">
+        Fooooooooooooooooooooooooooooooooooooooooooooooooo
+    </textarea>
+
+    <script>
+      async function moveCursorRightInsideElement(element, value){
+          var arrowRight = '\uE014';
+          for(var i=0;i<value;i++){
+            await test_driver.send_keys(element, arrowRight);
+          }
+      }
+
+      function runTest(){
+          promise_test(async(t) => { return new Promise(async (resolve, reject) => {
+            var input = document.getElementsByTagName('input')[0];
+            function handleScroll(){
+              resolve("Scroll Event successfully fired!");
+            }
+            input.addEventListener('scroll', handleScroll, false);
+            // move cursor to the right until the text scrolls
+            while(input.scrollLeft === 0){
+              await moveCursorRightInsideElement(input, 1);
+            }
+            // if there is no scroll event fired then test will fail by timeout
+          })},
+             /*
+               Moving the cursor using the arrow keys into an input element
+               fires scroll events when text has to scroll into view.
+               Uses arrow keys to move right in the input element.
+             */
+           "Scroll event fired for <input> element.");
+
+          promise_test(async(t) => { return new Promise(async (resolve, reject) => {
+            var textarea = document.getElementsByTagName('textarea')[0];
+            function handleScroll(){
+              resolve("Scroll Event successfully fired!");
+            }
+            textarea.addEventListener('scroll', handleScroll, false);
+            // move cursor to the right until the text scrolls
+            while(textarea.scrollLeft === 0){
+              await moveCursorRightInsideElement(textarea, 1);
+            }
+            // if there is no scroll event fired then test will fail by timeout
+          })},
+             /*
+              Moving the cursor using the arrow keys into a textarea element
+              fires scroll events when text has to scroll into view.
+              Uses arrow keys to move right in the textarea element.
+            */
+              "Scroll event fired for <textarea> element.");
+      }
+    </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/dedicated-worker-cache-storage.https.html b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/dedicated-worker-cache-storage.https.html
new file mode 100644
index 00000000000..2559de839a3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/dedicated-worker-cache-storage.https.html
@@ -0,0 +1,127 @@
+<!doctype html>
+<html>
+<title> Check enforcement of COEP in a DedicatedWorker using CacheStorage. </title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script>
+
+function remote(path) {
+  const REMOTE_ORIGIN = get_host_info().HTTPS_REMOTE_ORIGIN;
+  return new URL(path, REMOTE_ORIGIN);
+}
+
+const iframe_path = "./resources/iframe.html?pipe=";
+const dedicated_worker_path = "./dedicated-worker.js?pipe=";
+const ressource_path = "/images/blue.png?pipe=";
+
+const coep_header= {
+  "coep-none"         : "|header(Cross-Origin-Embedder-Policy,none)",
+  "coep-require-corp" : "|header(Cross-Origin-Embedder-Policy,require-corp)",
+}
+
+const corp_header = {
+  "corp-undefined": "",
+  "corp-cross-origin": "|header(Cross-Origin-Resource-Policy,cross-origin)",
+}
+
+// Check enforcement of COEP in a DedicatedWorker using CacheStorage.
+//
+// 1) Fetch a response from a document with COEP:none. Store it in the
+//    CacheStorage. The response is cross-origin without any CORS header.
+// 2) From an iframe, start a DedicatedWorker and try to retrieve the response
+//    from the CacheStorage.
+//
+// Test parameters:
+// - |iframe_coep| the COEP header of the iframe's document response
+// - |worker_coep| the COEP header of the DedicatedWorker's script response.
+// - |response_corp| the CORP header of the response.
+//
+// Test expectations:
+// |loaded| is true whenever the worker is able to fetch the response from
+// the CacheStorage. According to the specification:
+// https://mikewest.github.io/corpp/#initialize-embedder-policy-for-global
+// it must be false when:
+// - |iframe_coep| is 'coep-require-corp' and
+// - |response-corp| is 'corp-undefined'.
+//
+// |worker_coep| must be ignored.
+function check(
+  // Test parameters:
+  iframe_coep,
+  worker_coep,
+  response_corp,
+
+  // Test expectations:
+  loaded) {
+
+  promise_test(async (t) => {
+    // 1) Fetch a response from a document with COEP:none. Store it in the
+    //    CacheStorage. The response is cross-origin without any CORS header.
+    const resource_path = ressource_path + corp_header[response_corp];
+    const resource_url = remote(resource_path);
+    const fetch_request = new Request(resource_url, {mode: 'no-cors'});
+    const cache = await caches.open('v1');
+    const fetch_response = await fetch(fetch_request);
+    await cache.put(fetch_request, fetch_response);
+
+    // 2) From an iframe, start a DedicatedWorker and try to retrieve the
+    //    response from the CacheStorage.
+    const worker_url = dedicated_worker_path + coep_header[worker_coep];
+    const worker_eval = `
+      (async function() {
+        const cache = await caches.open('v1');
+        const request = new Request('${resource_url}', {
+          mode: 'no-cors'
+        });
+        try {
+          const response = await cache.match(request);
+          postMessage('success');
+        } catch(error) {
+          postMessage('error');
+        }
+      })()
+    `;
+
+    const iframe_url = iframe_path + coep_header[iframe_coep];
+    const iframe_eval = `
+      (async function() {
+        const w = new Worker('${worker_url}');
+        const worker_response = new Promise(resolve => w.onmessage = resolve);
+        w.postMessage(\`${worker_eval}\`);
+        const response = await worker_response;
+        parent.postMessage(response.data);
+      })();
+    `;
+
+    const iframe = document.createElement("iframe");
+    t.add_cleanup(() => iframe.remove());
+    iframe.src = iframe_url;
+    const iframe_loaded = new Promise(resolve => iframe.onload = resolve);
+    document.body.appendChild(iframe);
+    await iframe_loaded;
+
+    const iframe_response = new Promise(resolve => {
+      window.addEventListener("message", resolve);
+    })
+    iframe.contentWindow.postMessage(iframe_eval);
+
+    const {data} = await iframe_response;
+    assert_equals(data == "success", loaded);
+  }, `${iframe_coep} ${worker_coep} ${response_corp}`)
+}
+
+// -----------------------------------------------------------------------------
+//    iframe_coep         , worker_coep         , response_corp       , loaded
+// -----------------------------------------------------------------------------
+check("coep-none"         , "coep-none"         , "corp-cross-origin" , true);
+check("coep-none"         , "coep-none"         , "corp-undefined"    , true);
+check("coep-none"         , "coep-require-corp" , "corp-cross-origin" , true);
+check("coep-none"         , "coep-require-corp" , "corp-undefined"    , true);
+check("coep-require-corp" , "coep-none"         , "corp-cross-origin" , true);
+check("coep-require-corp" , "coep-none"         , "corp-undefined"    , false);
+check("coep-require-corp" , "coep-require-corp" , "corp-cross-origin" , true);
+check("coep-require-corp" , "coep-require-corp" , "corp-undefined"    , false);
+
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/dedicated-worker.js b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/dedicated-worker.js
new file mode 100644
index 00000000000..5d46edcde24
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/dedicated-worker.js
@@ -0,0 +1 @@
+onmessage = message => eval(message.data);
diff --git a/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/iframe.html b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/iframe.html
new file mode 100644
index 00000000000..a6b74ad924a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin-embedder-policy/resources/iframe.html
@@ -0,0 +1,3 @@
+<script>
+  window.addEventListener("message", message => eval(message.data));
+</script>
diff --git a/tests/wpt/web-platform-tests/interfaces/construct-stylesheets.idl b/tests/wpt/web-platform-tests/interfaces/construct-stylesheets.idl
new file mode 100644
index 00000000000..fca2a3e2887
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/construct-stylesheets.idl
@@ -0,0 +1,21 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into reffy-reports
+// (https://github.com/tidoust/reffy-reports)
+// Source: Constructable Stylesheet Objects (https://wicg.github.io/construct-stylesheets/)
+
+partial interface CSSStyleSheet {
+  constructor(optional CSSStyleSheetInit options = {});
+  Promise<CSSStyleSheet> replace(USVString text);
+  void replaceSync(USVString text);
+};
+
+dictionary CSSStyleSheetInit {
+  (MediaList or DOMString) media = "";
+  DOMString title = "";
+  boolean alternate = false;
+  boolean disabled = false;
+};
+
+partial interface DocumentOrShadowRoot {
+  attribute FrozenArray<CSSStyleSheet> adoptedStyleSheets;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/resize-observer.idl b/tests/wpt/web-platform-tests/interfaces/resize-observer.idl
index 448c949df9e..60d55a19bae 100644
--- a/tests/wpt/web-platform-tests/interfaces/resize-observer.idl
+++ b/tests/wpt/web-platform-tests/interfaces/resize-observer.idl
@@ -25,9 +25,9 @@ callback ResizeObserverCallback = void (sequence<ResizeObserverEntry> entries, R
 interface ResizeObserverEntry {
     readonly attribute Element target;
     readonly attribute DOMRectReadOnly contentRect;
-    readonly attribute sequence<ResizeObserverSize> borderBoxSize;
-    readonly attribute sequence<ResizeObserverSize> contentBoxSize;
-    readonly attribute sequence<ResizeObserverSize> devicePixelContentBoxSize;
+    readonly attribute FrozenArray<ResizeObserverSize> borderBoxSize;
+    readonly attribute FrozenArray<ResizeObserverSize> contentBoxSize;
+    readonly attribute FrozenArray<ResizeObserverSize> devicePixelContentBoxSize;
 };
 
 interface ResizeObserverSize {
diff --git a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001-ref.svg b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001-ref.svg
index 8f766668e6d..202ac3420dc 100644
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001-ref.svg
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001-ref.svg
@@ -14,27 +14,30 @@
     <marker id="Start"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="green">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
     <marker id="Mid"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="orange">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
     <marker id="End"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="blue">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
diff --git a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001.svg b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001.svg
index 6eeac7fc8f4..7fb4adf4277 100644
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001.svg
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-001.svg
@@ -17,27 +17,30 @@
     <marker id="Start"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="green">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
     <marker id="Mid"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="orange">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
     <marker id="End"
             viewBox="0 0 10 10" refX="0" refY="5"
             markerUnits="strokeWidth"
-            markerWidth="12"
-            markerHeight="9"
+            markerWidth="10"
+            markerHeight="10"
             orient="auto"
+            overflow="visible"
             fill="blue">
       <path d="M 0 0 L 10 5 L 0 10 z"/>
     </marker>
diff --git a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-022-ref.svg b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-022-ref.svg
index 2b808f02f09..8abf33f0880 100644
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-022-ref.svg
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-022-ref.svg
@@ -41,13 +41,13 @@
   </defs>
 
   <g id="test-body-reference" style="fill:none;stroke:black;stroke-width:2">
-    <path d="m 120,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-start:url(#Start)"/>
-    <path d="m 240,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-mid:url(#Mid)"/>
-    <path d="m 360,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-end:url(#End)"/>
+    <path d="m 120,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
+    <path d="m 240,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
+    <path d="m 360,100 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
 
-    <path d="m 60,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-start:url(#Start)"/>
-    <path d="m 200,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-mid:url(#Mid)"/>
-    <path d="m 340,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z" style="marker-end:url(#End)"/>
+    <path d="m 60,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
+    <path d="m 200,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
+    <path d="m 340,200 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z m 60,60 c -40,0 -40,0 -40,40 c 0,40 0,40 40,40 c 40,0 40,0 40,-40 c 0,-40 0,-40 -40,-40 z"/>
 
     <!-- Arrows -->
     <path d="m 120,100 -40,  0"   style="stroke:none;marker-start:url(#Start)"/>
diff --git a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-023-ref.svg b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-023-ref.svg
index a8e764442bb..4bd1c677762 100644
--- a/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-023-ref.svg
+++ b/tests/wpt/web-platform-tests/svg/painting/reftests/marker-path-023-ref.svg
@@ -41,13 +41,13 @@
   </defs>
 
   <g id="test-body-reference" style="fill:none;stroke:black;stroke-width:2">
-    <path d="m  120,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-start:url(#Start)"/>
-    <path d="m  240,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-mid:url(#Mid)"/>
-    <path d="m  360,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-end:url(#End)"/>
+    <path d="m  120,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
+    <path d="m  240,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
+    <path d="m  360,100  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
 
-    <path d="m   60,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-start:url(#Start)"/>
-    <path d="m  200,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-mid:url(#Mid)"/>
-    <path d="m  340,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z" style="marker-end:url(#End)"/>
+    <path d="m   60,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
+    <path d="m  200,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
+    <path d="m  340,200  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z m 60,60  a 40,40 0 0 0 -40,40  a  40,40 0 0 0 40,40 a 40,40 0 0 0 40,-40 a 40,40 0 0 0 -40,-40 z"/>
 
     <!-- Arrows -->
     <path d="m 120,100 -40,  0"   style="stroke:none;marker-start:url(#Start)"/>
diff --git a/tests/wpt/web-platform-tests/svg/styling/presentation-attributes-special-cases.html b/tests/wpt/web-platform-tests/svg/styling/presentation-attributes-special-cases.html
index c544c9c7a64..8fa045984d9 100644
--- a/tests/wpt/web-platform-tests/svg/styling/presentation-attributes-special-cases.html
+++ b/tests/wpt/web-platform-tests/svg/styling/presentation-attributes-special-cases.html
@@ -89,7 +89,7 @@ if (propertiesAreSupported(["rx", "ry"])) {
 
 if (CSS.supports("d", "initial")) {
   test(function() {
-    assertPresentationAttributeIsSupported("g", "d", "M0,0 L1,1", "d");
+    assertPresentationAttributeIsNotSupported("g", "d", "M0,0 L1,1", "d");
   }, `d presentation attribute not supported on other elements`);
 }
 
diff --git a/tests/wpt/web-platform-tests/svg/styling/presentation-attributes.js b/tests/wpt/web-platform-tests/svg/styling/presentation-attributes.js
index c9dc14ad490..552041496f1 100644
--- a/tests/wpt/web-platform-tests/svg/styling/presentation-attributes.js
+++ b/tests/wpt/web-platform-tests/svg/styling/presentation-attributes.js
@@ -62,7 +62,7 @@ const PROPERTIES = {
   "d": {
     value: "M0,0 L1,1",
     relevantElement: "path",
-    irrelevantElement: "image",
+    irrelevantElement: null,
   },
   "dominant-baseline": {
     value: "middle",
@@ -142,7 +142,7 @@ const PROPERTIES = {
   "height": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
   "image-rendering": {
     value: "optimizeSpeed",
@@ -207,17 +207,17 @@ const PROPERTIES = {
   "r": {
     value: "1",
     relevantElement: "circle",
-    irrelevantElement: "rect",
+    irrelevantElement: null,
   },
   "rx": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
   "ry": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
   "shape-rendering": {
     value: "geometricPrecision",
@@ -302,7 +302,7 @@ const PROPERTIES = {
   "transform": {
     value: "scale(2)",
     relevantElement: "g",
-    irrelevantElement: "linearGradient",
+    irrelevantElement: null,
   },
   "unicode-bidi": {
     value: "embed",
@@ -327,7 +327,7 @@ const PROPERTIES = {
   "width": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
   "word-spacing": {
     value: "1",
@@ -342,12 +342,12 @@ const PROPERTIES = {
   "x": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
   "y": {
     value: "1",
     relevantElement: "rect",
-    irrelevantElement: "path",
+    irrelevantElement: null,
   },
 };
 
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
index cb7323ece0a..ab36c95c113 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/base.py
@@ -260,8 +260,9 @@ class TestExecutor(object):
         try:
             result = self.do_test(test)
         except Exception as e:
-            self.logger.warning(traceback.format_exc(e))
-            result = self.result_from_exception(test, e)
+            exception_string = traceback.format_exc()
+            self.logger.warning(exception_string)
+            result = self.result_from_exception(test, e, exception_string)
 
         if result is Stop:
             return result
@@ -294,7 +295,7 @@ class TestExecutor(object):
     def on_environment_change(self, new_environment):
         pass
 
-    def result_from_exception(self, test, e):
+    def result_from_exception(self, test, e, exception_string):
         if hasattr(e, "status") and e.status in test.result_cls.statuses:
             status = e.status
         else:
@@ -302,7 +303,7 @@ class TestExecutor(object):
         message = text_type(getattr(e, "message", ""))
         if message:
             message += "\n"
-        message += traceback.format_exc(e)
+        message += exception_string
         return test.result_cls(status, message), []
 
     def wait(self):
@@ -579,7 +580,7 @@ class WdspecRun(object):
             message = getattr(e, "message")
             if message:
                 message += "\n"
-            message += traceback.format_exc(e)
+            message += traceback.format_exc()
             self.result = False, ("INTERNAL-ERROR", message)
         finally:
             self.result_flag.set()
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 4739d09b572..3f0b92f23b3 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
@@ -115,8 +115,8 @@ class MarionetteBaseProtocolPart(BaseProtocolPart):
             except IOError:
                 self.logger.debug("Socket closed")
                 break
-            except Exception as e:
-                self.logger.warning(traceback.format_exc(e))
+            except Exception:
+                self.logger.warning(traceback.format_exc())
                 break
 
 
@@ -138,12 +138,12 @@ class MarionetteTestharnessProtocolPart(TestharnessProtocolPart):
         self.logger.debug("Loading %s" % url)
         try:
             self.dismiss_alert(lambda: self.marionette.navigate(url))
-        except Exception as e:
+        except Exception:
             self.logger.critical(
                 "Loading initial page %s failed. Ensure that the "
                 "there are no other programs bound to this port and "
                 "that your firewall rules or network setup does not "
-                r"prevent access.\e%s" % (url, traceback.format_exc(e)))
+                r"prevent access.\e%s" % (url, traceback.format_exc()))
             raise
         self.runner_handle = self.marionette.current_window_handle
         format_map = {"title": threading.current_thread().name.replace("'", '"')}
@@ -659,7 +659,7 @@ class ExecuteAsyncScriptRun(TimedRunner):
                 message = getattr(e, "message", "")
                 if message:
                     message += "\n"
-                message += traceback.format_exc(e)
+                message += traceback.format_exc()
                 self.logger.warning(traceback.format_exc())
             self.result = False, ("INTERNAL-ERROR", message)
         finally:
@@ -809,10 +809,10 @@ class MarionetteRefTestExecutor(RefTestExecutor):
                 if handles:
                     self.protocol.marionette.switch_to_window(handles[0])
             super(self.__class__, self).teardown()
-        except Exception as e:
+        except Exception:
             # Ignore errors during teardown
             self.logger.warning("Exception during reftest teardown:\n%s" %
-                                traceback.format_exc(e))
+                                traceback.format_exc())
 
     def reset(self):
         self.implementation.reset(**self.implementation_kwargs)
@@ -935,9 +935,9 @@ class InternalRefTestImplementation(RefTestImplementation):
                 handles = self.executor.protocol.marionette.window_handles
                 if handles:
                     self.executor.protocol.marionette.switch_to_window(handles[0])
-        except Exception as e:
+        except Exception:
             # Ignore errors during teardown
-            self.logger.warning(traceback.format_exc(e))
+            self.logger.warning(traceback.format_exc())
 
 
 class GeckoDriverProtocol(WebDriverProtocol):
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorselenium.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorselenium.py
index 39d723a7886..5524d70bc71 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorselenium.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorselenium.py
@@ -73,8 +73,8 @@ class SeleniumBaseProtocolPart(BaseProtocolPart):
             except (socket.timeout, exceptions.NoSuchWindowException,
                     exceptions.ErrorInResponseException, IOError):
                 break
-            except Exception as e:
-                self.logger.error(traceback.format_exc(e))
+            except Exception:
+                self.logger.error(traceback.format_exc())
                 break
 
 
@@ -262,7 +262,7 @@ class SeleniumRun(TimedRunner):
             message = str(getattr(e, "message", ""))
             if message:
                 message += "\n"
-            message += traceback.format_exc(e)
+            message += traceback.format_exc()
             self.result = False, ("INTERNAL-ERROR", message)
         finally:
             self.result_flag.set()
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorservodriver.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorservodriver.py
index 02ecc756647..f6701da3405 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorservodriver.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorservodriver.py
@@ -126,8 +126,8 @@ class ServoWebDriverProtocol(Protocol):
                 pass
             except (socket.timeout, IOError):
                 break
-            except Exception as e:
-                self.logger.error(traceback.format_exc(e))
+            except Exception:
+                self.logger.error(traceback.format_exc())
                 break
 
 
@@ -146,7 +146,7 @@ class ServoWebDriverRun(TimedRunner):
             message = getattr(e, "message", "")
             if message:
                 message += "\n"
-            message += traceback.format_exc(e)
+            message += traceback.format_exc()
             self.result = False, ("INTERNAL-ERROR", e)
         finally:
             self.result_flag.set()
@@ -256,7 +256,7 @@ class ServoWebDriverRefTestExecutor(RefTestExecutor):
             message = getattr(e, "message", "")
             if message:
                 message += "\n"
-            message += traceback.format_exc(e)
+            message += traceback.format_exc()
             return test.result_cls("INTERNAL-ERROR", message), []
 
     def screenshot(self, test, viewport_size, dpi):
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorwebdriver.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorwebdriver.py
index eccba8c4a12..96488f462e7 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorwebdriver.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/executors/executorwebdriver.py
@@ -79,8 +79,8 @@ class WebDriverBaseProtocolPart(BaseProtocolPart):
                     client.UnknownErrorException,
                     IOError):
                 break
-            except Exception as e:
-                self.logger.error(traceback.format_exc(e))
+            except Exception:
+                self.logger.error(traceback.format_exc())
                 break
 
 
@@ -296,7 +296,7 @@ class WebDriverProtocol(Protocol):
             message = str(getattr(e, "message", ""))
             if message:
                 message += "\n"
-            message += traceback.format_exc(e)
+            message += traceback.format_exc()
             self.logger.debug(message)
         self.webdriver = None
 
@@ -345,7 +345,7 @@ class WebDriverRun(TimedRunner):
                 message = str(getattr(e, "message", ""))
                 if message:
                     message += "\n"
-                message += traceback.format_exc(e)
+                message += traceback.format_exc()
                 self.result = False, ("INTERNAL-ERROR", message)
         finally:
             self.result_flag.set()
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/metadata.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/metadata.py
index 73b6de9ad0f..69373c3387f 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/metadata.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/metadata.py
@@ -497,6 +497,9 @@ class ExpectedUpdater(object):
         return dir_id, self.id_test_map[dir_id]
 
     def lsan_leak(self, data):
+        if data["scope"] == "/":
+            logger.warning("Not updating lsan annotations for root scope")
+            return
         dir_id, test_data = self.test_for_scope(data)
         test_data.set(dir_id, None, "lsan",
                       self.run_info, (data["frames"], data.get("allowed_match")))
@@ -504,6 +507,9 @@ class ExpectedUpdater(object):
             test_data.set_requires_update()
 
     def mozleak_object(self, data):
+        if data["scope"] == "/":
+            logger.warning("Not updating mozleak annotations for root scope")
+            return
         dir_id, test_data = self.test_for_scope(data)
         test_data.set(dir_id, None, "leak-object",
                       self.run_info, ("%s:%s", (data["process"], data["name"]),
@@ -512,6 +518,9 @@ class ExpectedUpdater(object):
             test_data.set_requires_update()
 
     def mozleak_total(self, data):
+        if data["scope"] == "/":
+            logger.warning("Not updating mozleak annotations for root scope")
+            return
         if data["bytes"]:
             dir_id, test_data = self.test_for_scope(data)
             test_data.set(dir_id, None, "leak-threshold",
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
index 51e75442ce7..f0d830787a4 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
@@ -393,8 +393,8 @@ class TestRunnerManager(threading.Thread):
                             return
                     self.state = new_state
                     self.logger.debug("new state: %s" % self.state.__class__.__name__)
-            except Exception as e:
-                self.logger.error(traceback.format_exc(e))
+            except Exception:
+                self.logger.error(traceback.format_exc())
                 raise
             finally:
                 self.logger.debug("TestRunnerManager main loop terminating, starting cleanup")
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html
new file mode 100644
index 00000000000..730f03e5619
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-connections.html
@@ -0,0 +1,139 @@
+<!doctype html>
+<html>
+  <head>
+    <title>k-rate AudioParams with Inputs</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit-util.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+  </head>
+
+  <body>
+    <script>
+      let audit = Audit.createTaskRunner();
+
+      // Must be power of two to eliminate round-off
+      const sampleRate = 8192;
+
+      // Arbitrary duration that doesn't need to be too long to verify k-rate
+      // automations.  Probably should be at least a few render quanta.
+      const testDuration = 8 * RENDER_QUANTUM_FRAMES / sampleRate;
+
+      // Test k-rate GainNode.gain is k-rate
+      audit.define(
+          {label: 'Gain', description: 'k-rate GainNode.gain'},
+          (task, should) => {
+            let context = new OfflineAudioContext({
+              numberOfChannels: 2,
+              sampleRate: sampleRate,
+              length: testDuration * sampleRate
+            });
+
+            let merger = new ChannelMergerNode(
+                context, {numberOfInputs: context.destination.channelCount});
+            merger.connect(context.destination);
+
+            let src = new ConstantSourceNode(context);
+
+            createTestSubGraph(context, src, merger, 'GainNode', 'gain');
+
+            src.start();
+            context.startRendering()
+                .then(buffer => {
+                  let actual = buffer.getChannelData(0);
+                  let expected = buffer.getChannelData(1);
+
+                  for (let k = 0; k < actual.length;
+                       k += RENDER_QUANTUM_FRAMES) {
+                    should(
+                        actual.slice(k, k + RENDER_QUANTUM_FRAMES),
+                        `gain[${k}:${k + RENDER_QUANTUM_FRAMES}]`)
+                        .beConstantValueOf(expected[k]);
+                  }
+                })
+                .then(() => task.done());
+          });
+
+      // Test k-rate StereoPannerNode.pan is k-rate
+      audit.define(
+          {label: 'StereoPanner', description: 'k-rate StereoPannerNode.pan'},
+          (task, should) => {
+            let context = new OfflineAudioContext({
+              numberOfChannels: 2,
+              sampleRate: sampleRate,
+              length: testDuration * sampleRate
+            });
+            let merger = new ChannelMergerNode(
+                context, {numberOfInputs: context.destination.channelCount});
+            merger.connect(context.destination);
+
+            let src = new ConstantSourceNode(context);
+
+            createTestSubGraph(
+                context, src, merger, 'StereoPannerNode', 'pan', {
+                  testModSetup: node => {
+                    node.offset.setValueAtTime(-1, 0);
+                    node.offset.linearRampToValueAtTime(1, testDuration);
+                  }
+                });
+
+            src.start();
+            context.startRendering()
+                .then(buffer => {
+                  let actual = buffer.getChannelData(0);
+                  let expected = buffer.getChannelData(1);
+
+                  for (let k = 0; k < actual.length; k += 128) {
+                    should(actual.slice(k, k + 128), `pan[${k}:${k + 128}]`)
+                        .beConstantValueOf(expected[k]);
+                  }
+                })
+                .then(() => task.done());
+          });
+
+      audit.run();
+
+      function createTestSubGraph(
+          context, src, merger, nodeName, paramName, options) {
+        // The test node which has its AudioParam set up for k-rate autmoations.
+        let tstNode = new window[nodeName](context);
+
+        if (options && options.setups) {
+          options.setups(tstNode);
+        }
+        tstNode[paramName].automationRate = 'k-rate';
+
+        // Modulating signal for the test node.  Just a linear ramp. This is
+        // connected to the AudioParam of the tstNode.
+        let tstMod = new ConstantSourceNode(context);
+        if (options && options.testModSetup) {
+          options.testModSetup(tstMod);
+        } else {
+          tstMod.offset.linearRampToValueAtTime(context.length, testDuration);
+        }
+
+        tstMod.connect(tstNode[paramName]);
+        src.connect(tstNode).connect(merger, 0, 0);
+
+        // The ref node is the same type of node as the test node, but uses
+        // a-rate automation.  However, the modulating signal is k-rate.  This
+        // causes the input to the audio param to be constant over a render,
+        // which is basically the same as making the audio param be k-rate.
+        let refNode = new window[nodeName](context);
+        let refMod = new ConstantSourceNode(context);
+        refMod.offset.automationRate = 'k-rate';
+        if (options && options.testModSetup) {
+          options.testModSetup(refMod);
+        } else {
+          refMod.offset.linearRampToValueAtTime(context.length, testDuration);
+        }
+
+        refMod.connect(refNode[paramName]);
+        src.connect(refNode).connect(merger, 0, 1);
+
+        tstMod.start();
+        refMod.start();
+      }
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html
index 4db3548dacb..0bea5c91f85 100644
--- a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-audioparam-interface/k-rate-constant-source.html
@@ -44,6 +44,132 @@
         }).then(() => task.done());
       });
 
+      // Parameters for the For the following tests.
+
+      // Must be power of two to eliminate round-off
+      const sampleRate8k = 8192;
+
+      // Arbitrary duration that doesn't need to be too long to verify k-rate
+      // automations.  Probably should be at least a few render quanta.
+      const testDuration = 8 * RENDER_QUANTUM_FRAMES / sampleRate8k;
+
+      // Basic test that k-rate ConstantSourceNode.offset is k-rate.  This is
+      // the basis for all of the following tests, so make sure it's right.
+      audit.define(
+          {
+            label: 'ConstantSourceNode.offset k-rate automation',
+            description:
+                'Explicitly test ConstantSourceNode.offset k-rate automation is k-rate'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext({
+              numberOfChannels: 2,
+              sampleRate: sampleRate8k,
+              length: testDuration * sampleRate8k
+            });
+            let merger = new ChannelMergerNode(
+                context, {numberOfInputs: context.destination.channelCount});
+            merger.connect(context.destination);
+
+            // k-rate ConstantSource.offset using a linear ramp starting at 0
+            // and incrementing by 1 for each frame.
+            let src = new ConstantSourceNode(context, {offset: 0});
+            src.offset.automationRate = 'k-rate';
+
+            src.offset.setValueAtTime(0, 0);
+            src.offset.linearRampToValueAtTime(context.length, testDuration);
+
+            src.connect(merger, 0, 0);
+
+            src.start();
+
+            // a-rate ConstantSource using the same ramp as above.
+            let refSrc = new ConstantSourceNode(context, {offset: 0});
+
+            refSrc.offset.setValueAtTime(0, 0);
+            refSrc.offset.linearRampToValueAtTime(context.length, testDuration);
+
+            refSrc.connect(merger, 0, 1);
+
+            refSrc.start();
+
+            context.startRendering()
+                .then(buffer => {
+                  let actual = buffer.getChannelData(0);
+                  let expected = buffer.getChannelData(1);
+
+                  for (let k = 0; k < actual.length;
+                       k += RENDER_QUANTUM_FRAMES) {
+                    // Verify that the k-rate output is constant over the render
+                    // and that it matches the value of the a-rate value at the
+                    // beginning of the render.
+                    should(
+                        actual.slice(k, k + RENDER_QUANTUM_FRAMES),
+                        `k-rate ConstantSource.offset:  output[${k}:${
+                            k + RENDER_QUANTUM_FRAMES}]`)
+                        .beConstantValueOf(expected[k]);
+                  }
+                })
+                .then(() => task.done());
+          });
+
+      // This test verifies that a k-rate input to the ConstantSourceNode.offset
+      // works just as if we set the AudioParam to be k-rate.  This is the basis
+      // of the following tests, so make sure it works.
+      audit.define(
+          {
+            label: 'ConstantSource.offset',
+            description: 'Verify k-rate automation matches k-rate input'
+          },
+          (task, should) => {
+            let context = new OfflineAudioContext({
+              numberOfChannels: 2,
+              sampleRate: sampleRate8k,
+              length: testDuration * sampleRate8k
+            });
+
+            let merger = new ChannelMergerNode(
+                context, {numberOfInputs: context.destination.channelCount});
+            merger.connect(context.destination);
+
+            let tstSrc = new ConstantSourceNode(context);
+            let tstMod = new ConstantSourceNode(context);
+            tstSrc.offset.automationRate = 'k-rate';
+            tstMod.offset.linearRampToValueAtTime(context.length, testDuration);
+
+            tstMod.connect(tstSrc.offset)
+            tstSrc.connect(merger, 0, 0);
+
+            let refSrc = new ConstantSourceNode(context);
+            let refMod = new ConstantSourceNode(context);
+            refMod.offset.linearRampToValueAtTime(context.length, testDuration);
+            refMod.offset.automationRate = 'k-rate';
+
+            refMod.connect(refSrc.offset);
+            refSrc.connect(merger, 0, 1);
+
+            tstSrc.start();
+            tstMod.start();
+            refSrc.start();
+            refMod.start();
+
+            context.startRendering()
+                .then(buffer => {
+                  let actual = buffer.getChannelData(0);
+                  let expected = buffer.getChannelData(1);
+
+                  for (let k = 0; k < context.length;
+                       k += RENDER_QUANTUM_FRAMES) {
+                    should(
+                        actual.slice(k, k + RENDER_QUANTUM_FRAMES),
+                        `ConstantSource.offset k-rate input: output[${k}:${
+                            k + RENDER_QUANTUM_FRAMES}]`)
+                        .beConstantValueOf(expected[k]);
+                  }
+                })
+                .then(() => task.done());
+          });
+
       audit.run();
     </script>
   </body>
diff --git a/tests/wpt/web-platform-tests/webauthn/createcredential-timeout.https.html b/tests/wpt/web-platform-tests/webauthn/createcredential-timeout.https.html
index 09af4520ae8..fc35a6e72f0 100644
--- a/tests/wpt/web-platform-tests/webauthn/createcredential-timeout.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/createcredential-timeout.https.html
@@ -22,11 +22,12 @@
 promise_test(async t => {
     // if available, configure a mock authenticator that does not respond to user input
     try {
-        await window.test_driver.add_virtual_authenticator({
+        let authenticator = await window.test_driver.add_virtual_authenticator({
             protocol: "ctap1/u2f",
             transport: "usb",
             isUserConsenting: false,
         });
+      t.add_cleanup(() => window.test_driver.remove_virtual_authenticator(authenticator));
     } catch (error) {
         if (error !== "error: Action add_virtual_authenticator not implemented") {
             throw error;
diff --git a/tests/wpt/web-platform-tests/webauthn/getcredential-timeout.https.html b/tests/wpt/web-platform-tests/webauthn/getcredential-timeout.https.html
index 228ef509789..c4d8aed38c6 100644
--- a/tests/wpt/web-platform-tests/webauthn/getcredential-timeout.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/getcredential-timeout.https.html
@@ -22,6 +22,7 @@ promise_test(async t => {
             transport: "usb",
             isUserConsenting: false,
         });
+        t.add_cleanup(() => window.test_driver.remove_virtual_authenticator(authenticator));
         const private_key =
             "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg8_zMDQDYAxlU-Q"
           + "hk1Dwkf0v18GZca1DMF3SaJ9HPdmShRANCAASNYX5lyVCOZLzFZzrIKmeZ2jwU"
diff --git a/tests/wpt/web-platform-tests/webauthn/helpers.js b/tests/wpt/web-platform-tests/webauthn/helpers.js
index bf28e69cccf..0fc64c8b522 100644
--- a/tests/wpt/web-platform-tests/webauthn/helpers.js
+++ b/tests/wpt/web-platform-tests/webauthn/helpers.js
@@ -537,17 +537,28 @@ function validateAuthenticatorAssertionResponse(assert) {
 
 function standardSetup(cb) {
     // Setup an automated testing environment if available.
-    window.test_driver.add_virtual_authenticator({
-      protocol: "ctap1/u2f",
-      transport: "usb"
-    }).then(cb).catch(error => {
-        if (error === "error: Action add_virtual_authenticator not implemented") {
-          // The protocol is not available. Continue manually.
-          cb();
-          return;
+    let authenticator;
+    promise_test(async t => {
+        try {
+            authenticator = await window.test_driver.add_virtual_authenticator({
+                protocol: "ctap1/u2f",
+                transport: "usb"
+            });
+        } catch (error) {
+            if (error !== "error: Action add_virtual_authenticator not implemented") {
+                throw error;
+            }
+            // The protocol is not available. Continue manually.
         }
-        throw error;
-    });
+    }, "Set up the test environment");
+
+    cb();
+
+    promise_test(t => {
+        if (authenticator) {
+            return window.test_driver.remove_virtual_authenticator(authenticator);
+        }
+    }, "Clean up the test environment");
 }
 
 /* JSHINT */
diff --git a/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html b/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
index 7790f5d0d3f..4b8b08d975e 100644
--- a/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
@@ -10,8 +10,10 @@
 <script>
 "use strict";
 
+let authenticator;
+
 promise_test(async t => {
-  return window.test_driver.add_virtual_authenticator({
+  authenticator = await window.test_driver.add_virtual_authenticator({
     protocol: "ctap1/u2f",
     transport: "usb",
   });
@@ -114,4 +116,8 @@ promise_test(async t => {
     { name: "ECDSA", hash: "SHA-256" }, key, signature, signedData));
 }, "Get an assertion");
 
+promise_test(async t => {
+  await window.test_driver.remove_virtual_authenticator(authenticator);
+}, "Clean up the test environment");
+
 </script>
diff --git a/tests/wpt/web-platform-tests/workers/modules/shared-worker-import-failure.html b/tests/wpt/web-platform-tests/workers/modules/shared-worker-import-failure.html
index 5e8f547daf6..14579ba762f 100644
--- a/tests/wpt/web-platform-tests/workers/modules/shared-worker-import-failure.html
+++ b/tests/wpt/web-platform-tests/workers/modules/shared-worker-import-failure.html
@@ -7,8 +7,12 @@
 
 // TODO: Factor out the test cases into a separate file.
 // (like import-test-cases.js)
-// TODO: Add rest of the tests correponding to
-// 'dedicated-worker-import-failure.html'
+
+// SharedWorkers doesn't fire error events when runtime script errors occur.
+//
+// "For shared workers, if the error is still not handled afterwards, the error
+// may be reported to a developer console." [spec text]
+// https://html.spec.whatwg.org/C/#runtime-script-errors-2
 
 promise_test(async () => {
   const scriptURL = 'resources/import-scripts-worker.js';
@@ -25,6 +29,29 @@ promise_test(() => {
 }, 'Worker construction for non-existent script should dispatch an ' +
    'ErrorEvent.');
 
+promise_test(() => {
+  const scriptURL = 'resources/static-import-non-existent-script-worker.js';
+  const worker = new SharedWorker(scriptURL, { type: 'module' });
+  return new Promise(resolve => worker.onerror = resolve);
+}, 'Static import for non-existent script should dispatch an ErrorEvent.');
+
+promise_test(async () => {
+  const scriptURL = './non-existent-worker.js';
+  const worker =
+      new SharedWorker('resources/dynamic-import-given-url-worker.js',
+                       { type: 'module' });
+  worker.port.postMessage(scriptURL);
+  const msg_event = await new Promise((resolve, reject) => {
+    worker.port.onmessage = resolve;
+    worker.onerror = error => {
+      const msg = error instanceof ErrorEvent ? error.message
+                                              : 'unknown error';
+      reject(msg);
+    };
+  });
+  assert_equals(msg_event.data, 'TypeError');
+}, 'Dynamic import for non-existent script should throw an exception.');
+
 test(() => {
   const scriptURL = 'http://invalid:123$';
   assert_throws_dom('SyntaxError',