diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index b0534a94447..0c1e05dbb22 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -13585,6 +13585,12 @@
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     ]
    ],
+   "pointerevents/extension/pointerevent_pointerrawmove_in_pointerlock-manual.html": [
+    [
+     "/pointerevents/extension/pointerevent_pointerrawmove_in_pointerlock-manual.html",
+     {}
+    ]
+   ],
    "pointerevents/extension/pointerevent_touch-action-pan-down-css_touch-manual.html": [
     [
      "/pointerevents/extension/pointerevent_touch-action-pan-down-css_touch-manual.html",
@@ -14131,12 +14137,30 @@
      {}
     ]
    ],
+   "presentation-api/controlling-ua/reconnectToMultiplePresentations_success-manual.https.html": [
+    [
+     "/presentation-api/controlling-ua/reconnectToMultiplePresentations_success-manual.https.html",
+     {}
+    ]
+   ],
+   "presentation-api/controlling-ua/reconnectToPresentation_notfound_error-manual.https.html": [
+    [
+     "/presentation-api/controlling-ua/reconnectToPresentation_notfound_error-manual.https.html",
+     {}
+    ]
+   ],
    "presentation-api/controlling-ua/reconnectToPresentation_success-manual.https.html": [
     [
      "/presentation-api/controlling-ua/reconnectToPresentation_success-manual.https.html",
      {}
     ]
    ],
+   "presentation-api/controlling-ua/startMultiplePresentations_success-manual.https.html": [
+    [
+     "/presentation-api/controlling-ua/startMultiplePresentations_success-manual.https.html",
+     {}
+    ]
+   ],
    "presentation-api/controlling-ua/startNewPresentation_displaynotallowed-manual.https.html": [
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      "/presentation-api/controlling-ua/startNewPresentation_displaynotallowed-manual.https.html",
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-     [
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-       "=="
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     [
      "/css/css-contain/contain-layout-009.html",
@@ -109717,6 +109729,42 @@
      {}
     ]
    ],
+   "css/css-contain/contain-layout-independent-formatting-context-001.html": [
+    [
+     "/css/css-contain/contain-layout-independent-formatting-context-001.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-contain/contain-layout-independent-formatting-context-002.html": [
+    [
+     "/css/css-contain/contain-layout-independent-formatting-context-002.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-contain/contain-layout-independent-formatting-context-003.html": [
+    [
+     "/css/css-contain/contain-layout-independent-formatting-context-003.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-contain/contain-layout-ink-overflow-013.html": [
     [
      "/css/css-contain/contain-layout-ink-overflow-013.html",
@@ -109957,18 +110005,6 @@
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-   "css/css-contain/contain-paint-013.html": [
-    [
-     "/css/css-contain/contain-paint-013.html",
-     [
-      [
-       "/css/css-contain/reference/contain-paint-013-ref.html",
-       "=="
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    "css/css-contain/contain-paint-014.html": [
     [
      "/css/css-contain/contain-paint-014.html",
@@ -110281,6 +110317,42 @@
      {}
     ]
    ],
+   "css/css-contain/contain-paint-independent-formatting-context-001.html": [
+    [
+     "/css/css-contain/contain-paint-independent-formatting-context-001.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-contain/contain-paint-independent-formatting-context-002.html": [
+    [
+     "/css/css-contain/contain-paint-independent-formatting-context-002.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-contain/contain-paint-independent-formatting-context-003.html": [
+    [
+     "/css/css-contain/contain-paint-independent-formatting-context-003.html",
+     [
+      [
+       "/css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-contain/contain-paint-size-001.html": [
     [
      "/css/css-contain/contain-paint-size-001.html",
@@ -133969,6 +134041,30 @@
      {}
     ]
    ],
+   "css/css-tables/percentages-grandchildren-quirks-mode-001.html": [
+    [
+     "/css/css-tables/percentages-grandchildren-quirks-mode-001.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square-only.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-tables/percentages-grandchildren-quirks-mode-002.html": [
+    [
+     "/css/css-tables/percentages-grandchildren-quirks-mode-002.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square-only.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-tables/table-has-box-sizing-border-box-001.html": [
     [
      "/css/css-tables/table-has-box-sizing-border-box-001.html",
@@ -134497,6 +134593,18 @@
      {}
     ]
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+   "css/css-text/hyphens/hyphens-auto-001.html": [
+    [
+     "/css/css-text/hyphens/hyphens-auto-001.html",
+     [
+      [
+       "/css/css-text/hyphens/reference/hyphens-auto-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-text/i18n/css3-text-line-break-opclns-001.html": [
     [
      "/css/css-text/i18n/css3-text-line-break-opclns-001.html",
@@ -185617,12 +185725,24 @@
      {}
     ]
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-   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap.html": [
+   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html": [
     [
-     "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap.html",
+     "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html",
      [
       [
-       "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-ref.html",
+       "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/no-red-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html": [
+    [
+     "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html",
+     [
+      [
+       "/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative-ref.html",
        "=="
       ]
      ],
@@ -221489,6 +221609,16 @@
      {}
     ]
    ],
+   "cookie-store/resources/helper_iframe.sub.html": [
+    [
+     {}
+    ]
+   ],
+   "cookie-store/resources/helpers.js": [
+    [
+     {}
+    ]
+   ],
    "cookie-store/resources/http_cookie_and_set_cookie_headers.js": [
     [
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@@ -247669,11 +247799,6 @@
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-   "css/css-contain/reference/contain-paint-013-ref.html": [
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-   ],
    "css/css-contain/reference/contain-paint-022-ref.html": [
     [
      {}
@@ -247694,6 +247819,16 @@
      {}
     ]
    ],
+   "css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html": [
+    [
+     {}
+    ]
+   ],
+   "css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/css-contain/reference/contain-paint-size-001-ref.html": [
     [
      {}
@@ -258644,6 +258779,11 @@
      {}
     ]
    ],
+   "css/css-inline/META.yml": [
+    [
+     {}
+    ]
+   ],
    "css/css-layout-api/META.yml": [
     [
      {}
@@ -262874,6 +263014,11 @@
      {}
     ]
    ],
+   "css/css-text/hyphens/reference/hyphens-auto-001-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/css-text/i18n/META.yml": [
     [
      {}
@@ -271409,6 +271554,11 @@
      {}
     ]
    ],
+   "css/cssom/support/getComputedStyle-insets.js": [
+    [
+     {}
+    ]
+   ],
    "css/cssom/support/import-charset.css": [
     [
      {}
@@ -272464,6 +272614,11 @@
      {}
     ]
    ],
+   "css/support/inheritance-testcommon.js": [
+    [
+     {}
+    ]
+   ],
    "css/support/parsing-testcommon.js": [
     [
      {}
@@ -279689,6 +279844,16 @@
      {}
     ]
    ],
+   "feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html.headers": [
+    [
+     {}
+    ]
+   ],
+   "feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html.headers": [
+    [
+     {}
+    ]
+   ],
    "feature-policy/experimental-features/resources/async-script.js": [
     [
      {}
@@ -279729,6 +279894,11 @@
      {}
     ]
    ],
+   "feature-policy/experimental-features/resources/lazyload-contents.html": [
+    [
+     {}
+    ]
+   ],
    "feature-policy/experimental-features/resources/parser-blocking-script.js": [
     [
      {}
@@ -288344,7 +288514,7 @@
      {}
     ]
    ],
-   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-ref.html": [
+   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative-ref.html": [
     [
      {}
     ]
@@ -288429,6 +288599,11 @@
      {}
     ]
    ],
+   "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/no-red-ref.html": [
+    [
+     {}
+    ]
+   ],
    "html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/resources/fieldset-vertical.css": [
     [
      {}
@@ -295534,6 +295709,11 @@
      {}
     ]
    ],
+   "pointerevents/resources/pointerevent_pointerrawmove_in_pointerlock-iframe.html": [
+    [
+     {}
+    ]
+   ],
    "pointerlock/META.yml": [
     [
      {}
@@ -329942,6 +330122,18 @@
      {}
     ]
    ],
+   "cookie-store/cookieStore_get_set_across_frames.tentative.https.html": [
+    [
+     "/cookie-store/cookieStore_get_set_across_frames.tentative.https.html",
+     {}
+    ]
+   ],
+   "cookie-store/cookieStore_get_set_across_origins.tentative.sub.https.html": [
+    [
+     "/cookie-store/cookieStore_get_set_across_origins.tentative.sub.https.html",
+     {}
+    ]
+   ],
    "cookie-store/cookieStore_get_set_basic.tentative.https.window.js": [
     [
      "/cookie-store/cookieStore_get_set_basic.tentative.https.window.html",
@@ -331104,6 +331296,12 @@
      {}
     ]
    ],
+   "css/css-animations/inheritance.html": [
+    [
+     "/css/css-animations/inheritance.html",
+     {}
+    ]
+   ],
    "css/css-animations/parsing/animation-delay-invalid.html": [
     [
      "/css/css-animations/parsing/animation-delay-invalid.html",
@@ -332372,6 +332570,102 @@
      {}
     ]
    ],
+   "css/css-flexbox/parsing/flex-basis-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-basis-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-basis-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-basis-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-direction-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-direction-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-direction-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-direction-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-flow-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-flow-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-flow-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-flow-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-grow-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-grow-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-grow-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-grow-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-shrink-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-shrink-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-shrink-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-shrink-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-wrap-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-wrap-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/flex-wrap-valid.html": [
+    [
+     "/css/css-flexbox/parsing/flex-wrap-valid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/order-invalid.html": [
+    [
+     "/css/css-flexbox/parsing/order-invalid.html",
+     {}
+    ]
+   ],
+   "css/css-flexbox/parsing/order-valid.html": [
+    [
+     "/css/css-flexbox/parsing/order-valid.html",
+     {}
+    ]
+   ],
    "css/css-flexbox/percentage-heights-000.html": [
     [
      "/css/css-flexbox/percentage-heights-000.html",
@@ -334198,6 +334492,12 @@
      {}
     ]
    ],
+   "css/css-inline/inheritance.html": [
+    [
+     "/css/css-inline/inheritance.html",
+     {}
+    ]
+   ],
    "css/css-layout-api/at-supports-rule.https.html": [
     [
      "/css/css-layout-api/at-supports-rule.https.html",
@@ -337492,12 +337792,24 @@
      {}
     ]
    ],
+   "css/css-transitions/historical.html": [
+    [
+     "/css/css-transitions/historical.html",
+     {}
+    ]
+   ],
    "css/css-transitions/idlharness.html": [
     [
      "/css/css-transitions/idlharness.html",
      {}
     ]
    ],
+   "css/css-transitions/inheritance.html": [
+    [
+     "/css/css-transitions/inheritance.html",
+     {}
+    ]
+   ],
    "css/css-transitions/parsing/transition-delay-invalid.html": [
     [
      "/css/css-transitions/parsing/transition-delay-invalid.html",
@@ -341244,6 +341556,42 @@
      {}
     ]
    ],
+   "css/cssom/getComputedStyle-insets-absolute.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-absolute.html",
+     {}
+    ]
+   ],
+   "css/cssom/getComputedStyle-insets-fixed.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-fixed.html",
+     {}
+    ]
+   ],
+   "css/cssom/getComputedStyle-insets-nobox.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-nobox.html",
+     {}
+    ]
+   ],
+   "css/cssom/getComputedStyle-insets-relative.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-relative.html",
+     {}
+    ]
+   ],
+   "css/cssom/getComputedStyle-insets-static.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-static.html",
+     {}
+    ]
+   ],
+   "css/cssom/getComputedStyle-insets-sticky.html": [
+    [
+     "/css/cssom/getComputedStyle-insets-sticky.html",
+     {}
+    ]
+   ],
    "css/cssom/getComputedStyle-pseudo.html": [
     [
      "/css/cssom/getComputedStyle-pseudo.html",
@@ -342314,6 +342662,12 @@
      {}
     ]
    ],
+   "custom-elements/parser/parser-custom-element-in-foreign-content.html": [
+    [
+     "/custom-elements/parser/parser-custom-element-in-foreign-content.html",
+     {}
+    ]
+   ],
    "custom-elements/parser/parser-fallsback-to-unknown-element.html": [
     [
      "/custom-elements/parser/parser-fallsback-to-unknown-element.html",
@@ -354162,6 +354516,18 @@
      {}
     ]
    ],
+   "feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html": [
+    [
+     "/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html",
+     {}
+    ]
+   ],
+   "feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html": [
+    [
+     "/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html",
+     {}
+    ]
+   ],
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     [
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@@ -384740,12 +385106,6 @@
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-     {}
-    ]
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     [
      "/presentation-api/controlling-ua/reconnectToPresentation_sandboxing_success.https.html",
@@ -396440,6 +396800,22 @@
      {}
     ]
    ],
+   "speech-api/SpeechSynthesis-pause-resume.tentative.html": [
+    [
+     "/speech-api/SpeechSynthesis-pause-resume.tentative.html",
+     {
+      "testdriver": true
+     }
+    ]
+   ],
+   "speech-api/SpeechSynthesis-speak-events.html": [
+    [
+     "/speech-api/SpeechSynthesis-speak-events.html",
+     {
+      "testdriver": true
+     }
+    ]
+   ],
    "speech-api/SpeechSynthesis-speak-ownership.html": [
     [
      "/speech-api/SpeechSynthesis-speak-ownership.html",
@@ -396456,14 +396832,6 @@
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-    [
-     "/speech-api/SpeechSynthesis-speak-with-activation-succeeds.html",
-     {
-      "testdriver": true
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     [
      "/speech-api/SpeechSynthesis-speak-without-activation-fails.tentative.html",
@@ -398484,6 +398852,12 @@
      {}
     ]
    ],
+   "trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html": [
+    [
+     "/trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html",
+     {}
+    ]
+   ],
    "trusted-types/Document-write.tentative.html": [
     [
      "/trusted-types/Document-write.tentative.html",
@@ -398508,6 +398882,12 @@
      {}
     ]
    ],
+   "trusted-types/Element-setAttributeNS.tentative.html": [
+    [
+     "/trusted-types/Element-setAttributeNS.tentative.html",
+     {}
+    ]
+   ],
    "trusted-types/HTMLElement-generic.tentative.html": [
     [
      "/trusted-types/HTMLElement-generic.tentative.html",
@@ -398586,6 +398966,12 @@
      {}
     ]
    ],
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   ],
+  "trusted-types/block-string-assignment-to-Element-setAttributeNS.tentative.html": [
+   "5a72992100ced1ae73766f147e29fa0afa6c8334",
+   "testharness"
+  ],
   "trusted-types/block-string-assignment-to-HTMLElement-generic.tentative.html": [
    "f31fce629bccd342ff5e8dfacd43e13faac6fced",
    "testharness"
@@ -654532,7 +655154,7 @@
    "testharness"
   ],
   "trusted-types/support/helper.sub.js": [
-   "1ad5b4ef0c68a1ffde111db62c5e2aa4957732b6",
+   "75874e5b3c2ed90f0ebfbfca2da701d027d2d832",
    "support"
   ],
   "uievents/META.yml": [
@@ -658151,10 +658773,6 @@
    "6326d00dfb78efefd8a179e87dc53b531584895d",
    "testharness"
   ],
-  "webaudio/the-audio-api/the-gainnode-interface/test-gainnode.html": [
-   "f0c8e42044b6aa4c6ed32b6c65d73550c91abf73",
-   "testharness"
-  ],
   "webaudio/the-audio-api/the-iirfilternode-interface/ctor-iirfilter.html": [
    "e884d487af8fc89b6b162177c7402eac692c02e3",
    "testharness"
diff --git a/tests/wpt/metadata/css/css-animations/inheritance.html.ini b/tests/wpt/metadata/css/css-animations/inheritance.html.ini
new file mode 100644
index 00000000000..495d1fed41d
--- /dev/null
+++ b/tests/wpt/metadata/css/css-animations/inheritance.html.ini
@@ -0,0 +1,49 @@
+[inheritance.html]
+  [Property animation-name has initial value none]
+    expected: FAIL
+
+  [Property animation-name does not inherit]
+    expected: FAIL
+
+  [Property animation-direction has initial value normal]
+    expected: FAIL
+
+  [Property animation-duration does not inherit]
+    expected: FAIL
+
+  [Property animation-play-state has initial value running]
+    expected: FAIL
+
+  [Property animation-fill-mode has initial value none]
+    expected: FAIL
+
+  [Property animation-delay has initial value 0s]
+    expected: FAIL
+
+  [Property animation-timing-function does not inherit]
+    expected: FAIL
+
+  [Property animation-direction does not inherit]
+    expected: FAIL
+
+  [Property animation-duration has initial value 0s]
+    expected: FAIL
+
+  [Property animation-delay does not inherit]
+    expected: FAIL
+
+  [Property animation-iteration-count does not inherit]
+    expected: FAIL
+
+  [Property animation-fill-mode does not inherit]
+    expected: FAIL
+
+  [Property animation-timing-function has initial value ease]
+    expected: FAIL
+
+  [Property animation-play-state does not inherit]
+    expected: FAIL
+
+  [Property animation-iteration-count has initial value 1]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transitions/inheritance.html.ini b/tests/wpt/metadata/css/css-transitions/inheritance.html.ini
new file mode 100644
index 00000000000..549c97e7414
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transitions/inheritance.html.ini
@@ -0,0 +1,25 @@
+[inheritance.html]
+  [Property transition-delay does not inherit]
+    expected: FAIL
+
+  [Property transition-property has initial value all]
+    expected: FAIL
+
+  [Property transition-timing-function has initial value ease]
+    expected: FAIL
+
+  [Property transition-duration has initial value 0s]
+    expected: FAIL
+
+  [Property transition-duration does not inherit]
+    expected: FAIL
+
+  [Property transition-delay has initial value 0s]
+    expected: FAIL
+
+  [Property transition-timing-function does not inherit]
+    expected: FAIL
+
+  [Property transition-property does not inherit]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-transitions/transitions-animatable-properties-01.html.ini b/tests/wpt/metadata/css/css-transitions/transitions-animatable-properties-01.html.ini
index 5b9f5a9888c..b07393a05bc 100644
--- a/tests/wpt/metadata/css/css-transitions/transitions-animatable-properties-01.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/transitions-animatable-properties-01.html.ini
@@ -68,12 +68,6 @@
   [outline-width intermediate]
     expected: FAIL
 
-  [outline-width end]
-    expected: FAIL
-
-  [border-bottom-width end]
-    expected: FAIL
-
   [bottom intermediate]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-absolute.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-absolute.html.ini
new file mode 100644
index 00000000000..0fcea9e70f7
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-absolute.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-absolute.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-fixed.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-fixed.html.ini
new file mode 100644
index 00000000000..e46b9c445e0
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-fixed.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-fixed.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-nobox.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-nobox.html.ini
new file mode 100644
index 00000000000..7ca66dc0456
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-nobox.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-nobox.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-relative.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-relative.html.ini
new file mode 100644
index 00000000000..623f02a9f9a
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-relative.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-relative.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-static.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-static.html.ini
new file mode 100644
index 00000000000..555f2b80aae
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-static.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-static.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/cssom/getComputedStyle-insets-sticky.html.ini b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-sticky.html.ini
new file mode 100644
index 00000000000..4723e4371f4
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom/getComputedStyle-insets-sticky.html.ini
@@ -0,0 +1,2 @@
+[getComputedStyle-insets-sticky.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/custom-elements/parser/parser-custom-element-in-foreign-content.html.ini b/tests/wpt/metadata/custom-elements/parser/parser-custom-element-in-foreign-content.html.ini
new file mode 100644
index 00000000000..8709d58ff6a
--- /dev/null
+++ b/tests/wpt/metadata/custom-elements/parser/parser-custom-element-in-foreign-content.html.ini
@@ -0,0 +1,4 @@
+[parser-custom-element-in-foreign-content.html]
+  [HTML parser should not create custom elements in non-HTML namespaces]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
new file mode 100644
index 00000000000..87b07c3e670
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
@@ -0,0 +1,4 @@
+[traverse_the_history_1.html]
+  [Multiple history traversals from the same task]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html.ini b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html.ini
new file mode 100644
index 00000000000..080e44db047
--- /dev/null
+++ b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html.ini
@@ -0,0 +1,2 @@
+[fieldset-border-gap-negative-margin.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html.ini b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html.ini
new file mode 100644
index 00000000000..167d3129781
--- /dev/null
+++ b/tests/wpt/metadata/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html.ini
@@ -0,0 +1,2 @@
+[fieldset-border-gap-position-relative.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/adoption.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/adoption.html.ini
index 21672e83393..0cc1f123d22 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/adoption.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/adoption.html.ini
@@ -1,6 +1,5 @@
 [adoption.html]
   type: testharness
-  expected: TIMEOUT
   [adoption is from appendChild]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index d129c20cf72..6dc30b21283 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,6 +1,5 @@
 [non-active-document.html]
   type: testharness
-  expected: CRASH
   [DOMParser]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
new file mode 100644
index 00000000000..9e522297c94
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
@@ -0,0 +1,7 @@
+[toggleEvent.html]
+  [Calling open twice on 'details' fires only one toggle event]
+    expected: FAIL
+
+  [Setting open=true to opened 'details' element should not fire a toggle event at the 'details' element]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..a9677391662
--- /dev/null
+++ b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
@@ -0,0 +1,4 @@
+[DOMContentLoaded-defer.html]
+  [The end: DOMContentLoaded and defer scripts]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
index ce482a60da8..c6d49957c4a 100644
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
@@ -2,6 +2,3 @@
   [document.open() after parser is aborted]
     expected: FAIL
 
-  [async document.open() after parser is aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/url/urlencoded-parser.any.js.ini b/tests/wpt/metadata/url/urlencoded-parser.any.js.ini
index a7b88eb470f..45160d1be12 100644
--- a/tests/wpt/metadata/url/urlencoded-parser.any.js.ini
+++ b/tests/wpt/metadata/url/urlencoded-parser.any.js.ini
@@ -5,35 +5,29 @@
   [response.formData() with input: a&b&c]
     expected: FAIL
 
-  [response.formData() with input: a=b&c=d]
-    expected: FAIL
-
   [request.formData() with input: &&&a=b&&&&c=d&]
     expected: FAIL
 
-  [response.formData() with input: a=b&c=d&]
-    expected: FAIL
-
   [request.formData() with input: a=b&c=d]
     expected: FAIL
 
-  [response.formData() with input: &&&a=b&&&&c=d&]
-    expected: FAIL
-
   [request.formData() with input: a=b&c=d&]
     expected: FAIL
 
 
 [urlencoded-parser.any.worker.html]
-  [response.formData() with input: a&b&c]
-    expected: FAIL
-
   [response.formData() with input: a=b&c=d]
     expected: FAIL
 
-  [request.formData() with input: a=b&c=d&]
-    expected: FAIL
-
   [request.formData() with input: a&b&c]
     expected: FAIL
 
+  [request.formData() with input: _charset_=windows-1252&test=%C2x]
+    expected: FAIL
+
+  [response.formData() with input: a=b&c=d&]
+    expected: FAIL
+
+  [response.formData() with input: &&&a=b&&&&c=d&]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini b/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
index 9d72f08e38e..f806a845a2a 100644
--- a/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
+++ b/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
@@ -1,5 +1,6 @@
 [005.html]
   type: testharness
+  expected: ERROR
   [dedicated worker in shared worker in dedicated worker]
     expected: FAIL
 
diff --git a/tests/wpt/web-platform-tests/accname/name_test_case_661-manual.html b/tests/wpt/web-platform-tests/accname/name_test_case_661-manual.html
index e1f25ba7c66..2bb16f9ffc0 100644
--- a/tests/wpt/web-platform-tests/accname/name_test_case_661-manual.html
+++ b/tests/wpt/web-platform-tests/accname/name_test_case_661-manual.html
@@ -21,7 +21,7 @@
                   "property",
                   "name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "AXAPI" : [
@@ -29,7 +29,7 @@
                   "property",
                   "AXDescription",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "IAccessible2" : [
@@ -37,7 +37,7 @@
                   "property",
                   "accName",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "UIA" : [
@@ -45,7 +45,7 @@
                   "property",
                   "Name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ]
          },
diff --git a/tests/wpt/web-platform-tests/accname/name_test_case_662-manual.html b/tests/wpt/web-platform-tests/accname/name_test_case_662-manual.html
index 4d69b0f1b57..55875694381 100644
--- a/tests/wpt/web-platform-tests/accname/name_test_case_662-manual.html
+++ b/tests/wpt/web-platform-tests/accname/name_test_case_662-manual.html
@@ -21,7 +21,7 @@
                   "property",
                   "name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "AXAPI" : [
@@ -29,7 +29,7 @@
                   "property",
                   "AXDescription",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "IAccessible2" : [
@@ -37,7 +37,7 @@
                   "property",
                   "accName",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "UIA" : [
@@ -45,7 +45,7 @@
                   "property",
                   "Name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ]
          },
diff --git a/tests/wpt/web-platform-tests/accname/name_test_case_663a-manual.html b/tests/wpt/web-platform-tests/accname/name_test_case_663a-manual.html
index 95ec2f857b7..3fc3d17ccdf 100644
--- a/tests/wpt/web-platform-tests/accname/name_test_case_663a-manual.html
+++ b/tests/wpt/web-platform-tests/accname/name_test_case_663a-manual.html
@@ -21,7 +21,7 @@
                   "property",
                   "name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "AXAPI" : [
@@ -29,7 +29,7 @@
                   "property",
                   "AXDescription",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "IAccessible2" : [
@@ -37,7 +37,7 @@
                   "property",
                   "accName",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ],
             "UIA" : [
@@ -45,7 +45,7 @@
                   "property",
                   "Name",
                   "is",
-                  "foo bar baz"
+                  "foo baz"
                ]
             ]
          },
diff --git a/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_frames.tentative.https.html b/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_frames.tentative.https.html
new file mode 100644
index 00000000000..fe5c1f14605
--- /dev/null
+++ b/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_frames.tentative.https.html
@@ -0,0 +1,40 @@
+<!doctype html>
+<meta charset='utf-8'>
+<title>Async Cookies: cookieStore basic API across frames</title>
+<link rel='help' href='https://github.com/WICG/cookie-store'>
+<link rel='author' href='jarrydg@chromium.org' title='Jarryd Goodman'>
+<script src='/resources/testharness.js'></script>
+<script src='/resources/testharnessreport.js'></script>
+<style>iframe { display: none; }</style>
+<iframe id='iframe'></iframe>
+<script>
+'use strict';
+
+promise_test(async t => {
+  const iframe = document.getElementById('iframe');
+  const frameCookieStore = iframe.contentWindow.cookieStore;
+
+  const oldCookie = await frameCookieStore.get('cookie-name');
+  assert_equals(oldCookie, null);
+
+  await cookieStore.set('cookie-name', 'cookie-value');
+  t.add_cleanup(() => cookieStore.delete('cookie-name'));
+
+  const frameCookie = await frameCookieStore.get('cookie-name');
+  assert_equals(frameCookie.value, 'cookie-value');
+}, 'cookieStore.get() sees cookieStore.set() in frame');
+
+promise_test(async t => {
+  const iframe = document.getElementById('iframe');
+  const frameCookieStore = iframe.contentWindow.cookieStore;
+
+  const oldCookie = await frameCookieStore.get('cookie-name');
+  assert_equals(oldCookie, null);
+
+  await frameCookieStore.set('cookie-name', 'cookie-value');
+  t.add_cleanup(() => frameCookieStore.delete('cookie-name'));
+
+  const cookie = await cookieStore.get('cookie-name');
+  assert_equals(cookie.value, 'cookie-value');
+}, 'cookieStore.get() in frame sees cookieStore.set()')
+</script>
diff --git a/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_origins.tentative.sub.https.html b/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_origins.tentative.sub.https.html
new file mode 100644
index 00000000000..5cbe542e32b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/cookie-store/cookieStore_get_set_across_origins.tentative.sub.https.html
@@ -0,0 +1,63 @@
+<!doctype html>
+<meta charset='utf-8'>
+<title>Async Cookies: cookieStore basic API across origins</title>
+<link rel='help' href='https://github.com/WICG/cookie-store'>
+<link rel='author' href='jarrydg@chromium.org' title='Jarryd Goodman'>
+<script src='/resources/testharness.js'></script>
+<script src='/resources/testharnessreport.js'></script>
+<script src='resources/helpers.js'></script>
+<style>iframe { display: none; }</style>
+
+<script>
+'use strict';
+
+const kPath = '/cookie-store/resources/helper_iframe.sub.html';
+const kCorsBase = `https://{{domains[www1]}}:{{ports[https][0]}}`;
+const kCorsUrl = `${kCorsBase}${kPath}`;
+
+promise_test(async t => {
+  const iframe = await createIframe(kCorsUrl, t);
+  assert_true(iframe != null);
+
+  iframe.contentWindow.postMessage({
+    opname: 'set-cookie',
+    name: 'cookie-name',
+    value: 'cookie-value',
+  }, kCorsBase);
+  t.add_cleanup(() => {
+    cookieStore.delete('cookie-name');
+  });
+
+  await waitForMessage();
+
+  const cookies = await cookieStore.getAll();
+  assert_equals(cookies.length, 1);
+  assert_equals(cookies[0].name, 'cookie-name');
+  assert_equals(cookies[0].value, 'cookie-value');
+}, 'cookieStore.get() sees cookieStore.set() in cross-origin frame');
+
+promise_test(async t => {
+  const iframe = await createIframe(kCorsUrl, t);
+  assert_true(iframe != null);
+
+  await cookieStore.set('cookie-name', 'cookie-value');
+
+  const cookie = await cookieStore.get('cookie-name');
+  assert_equals(cookie.value, 'cookie-value');
+
+  iframe.contentWindow.postMessage({
+    opname: 'get-cookie',
+    name: 'cookie-name',
+  }, kCorsBase);
+  t.add_cleanup(() => {
+    cookieStore.delete('cookie-name');
+  })
+
+  const message = await waitForMessage();
+
+  const { frameCookie } = message;
+  assert_not_equals(frameCookie, null);
+  assert_equals(frameCookie.name, 'cookie-name');
+  assert_equals(frameCookie.value, 'cookie-value');
+}, 'cookieStore.get() in cross-origin frame sees cookieStore.set()');
+</script>
diff --git a/tests/wpt/web-platform-tests/cookie-store/resources/helper_iframe.sub.html b/tests/wpt/web-platform-tests/cookie-store/resources/helper_iframe.sub.html
new file mode 100644
index 00000000000..8e91cb7bed4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/cookie-store/resources/helper_iframe.sub.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset='utf-8'>
+<link rel='author' href='jarrydg@chromium.org' title='Jarryd Goodman'>
+<script>
+  'use strict';
+
+  // Writing a cookie:
+  //   Input: { cookieToSet: { name: 'cookie-name', value: 'cookie-value' } }
+  //   Response: "Cookie has been set"
+  //
+  // Read a cookie.
+  //   Command: { existingCookieName: 'cookie-name' }
+  //   Response: Result of cookieStore.get():
+  //     { frameCookie: { name: 'cookie-name', value: 'cookie-value' } }
+  window.addEventListener('message', async function (event) {
+    const { opname } = event.data;
+    if (opname === 'set-cookie') {
+      const { name, value } = event.data
+      await cookieStore.set({
+        name,
+        value,
+        domain: '{{host}}',
+      });
+      event.source.postMessage('Cookie has been set', event.origin);
+    } else if (opname === 'get-cookie') {
+      const { name } = event.data
+      const frameCookie = await cookieStore.get(name);
+      event.source.postMessage({frameCookie}, event.origin);
+    }
+  });
+</script>
diff --git a/tests/wpt/web-platform-tests/cookie-store/resources/helpers.js b/tests/wpt/web-platform-tests/cookie-store/resources/helpers.js
new file mode 100644
index 00000000000..98f9ff6cb09
--- /dev/null
+++ b/tests/wpt/web-platform-tests/cookie-store/resources/helpers.js
@@ -0,0 +1,24 @@
+/**
+ * Promise based helper function who's return promise will resolve
+ * once the iframe src has been loaded
+ * @param {string} url the url to set the iframe src
+ * @param {test} t a test object to add a cleanup function to
+ * @return {Promise} when resolved, will return the iframe
+ */
+self.createIframe = (url, t) => new Promise(resolve => {
+  const iframe = document.createElement('iframe');
+  iframe.addEventListener('load', () => {resolve(iframe);}, {once: true});
+  iframe.src = url;
+  document.documentElement.appendChild(iframe);
+  t.add_cleanup(() => iframe.remove());
+});
+
+/**
+ * Function that will return a promise that resolves when a message event
+ * is fired. Returns a promise that resolves to the message that was received
+ */
+self.waitForMessage = () => new Promise(resolve => {
+  window.addEventListener('message', event => {
+    resolve(event.data);
+  }, {once: true});
+});
diff --git a/tests/wpt/web-platform-tests/css/css-animations/inheritance.html b/tests/wpt/web-platform-tests/css/css-animations/inheritance.html
new file mode 100644
index 00000000000..6e7697b9d81
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-animations/inheritance.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Inheritance of CSS Animations properties</title>
+<link rel="help" href="https://drafts.csswg.org/css-animations/#property-index">
+<meta name="assert" content="Properties inherit or not according to the spec.">
+<meta name="assert" content="Properties have initial values according to the spec.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/inheritance-testcommon.js"></script>
+</head>
+<body>
+<div id="container">
+<div id="target"></div>
+</div>
+<script>
+assert_not_inherited('animation-delay', '0s', '2s');
+assert_not_inherited('animation-direction', 'normal', 'reverse');
+assert_not_inherited('animation-duration', '0s', '3s');
+assert_not_inherited('animation-fill-mode', 'none', 'forwards');
+assert_not_inherited('animation-iteration-count', '1', '4');
+assert_not_inherited('animation-name', 'none', 'spinner');
+assert_not_inherited('animation-play-state', 'running', 'paused');
+assert_not_inherited('animation-timing-function', 'ease', 'linear');
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001.html b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001.html
new file mode 100644
index 00000000000..94c88bc49cb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Layout containment independent formatting context</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-001-ref.html">
+<meta name=assert content="Layout containment elements establish an independent formatting context. The test checks that this feature of layout containment applies to blocks.">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <div style="margin: 1em 0; contain: layout;">
+    <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-layout-008.html b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-002.html
similarity index 51%
rename from tests/wpt/web-platform-tests/css/css-contain/contain-layout-008.html
rename to tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-002.html
index d442bebb065..a7e8baed56d 100644
--- a/tests/wpt/web-platform-tests/css/css-contain/contain-layout-008.html
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-002.html
@@ -3,27 +3,17 @@
 <title>CSS Containment Test: Layout containment independent formatting context</title>
 <link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
 <link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">
-<link rel="match" href="reference/contain-paint-013-ref.html">
-<meta name=assert content="Layout containment elements establish an independent formatting context. The test checks that this feature of layout containment applies to blocks and inline blocks, but it doesn't apply to inline elements.">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-001-ref.html">
+<meta name=assert content="Layout containment elements establish an independent formatting context. The test checks that this feature of layout containment applies to inline blocks.">
 <style>
 .wrapper {
   border: solid thick;
   margin: 1em;
 }
 </style>
-<p>Test passes if on the first two boxes the top and bottom margins of the text line are double size than on the last box.</p>
-<div class="wrapper">
-  <div style="margin: 1em 0; contain: layout;">
-    <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
-  </div>
-</div>
+<p>Test passes if it has the same output than the reference.</p>
 <div class="wrapper">
   <span style="display: inline-block; margin: 1em 0; contain: layout;">
     <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
   </span>
 </div>
-<div class="wrapper">
-  <span style="margin: 1em 0; contain: layout;">
-    <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
-  </span>
-</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-003.html b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-003.html
new file mode 100644
index 00000000000..a10afd3cdee
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-003.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Layout containment independent formatting context</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-003-ref.html">
+<meta name=assert content="Layout containment elements establish an independent formatting context. The test checks that this feature of paint containment does not appliy to inline elements.">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <span style="margin: 1em 0; contain: layout;">
+    <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
+  </span>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-001.html b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-001.html
new file mode 100644
index 00000000000..e4c06a992b3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-001.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Paint containment independent formatting context</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-paint">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-001-ref.html">
+<meta name=assert content="Paint containment elements establish an independent formatting context. The test checks that this feature of paint containment applies to blocks.">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <div style="margin: 1em 0; contain: paint;">
+    <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-paint-013.html b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-002.html
similarity index 51%
rename from tests/wpt/web-platform-tests/css/css-contain/contain-paint-013.html
rename to tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-002.html
index 3b6b3a76dc6..353196970c9 100644
--- a/tests/wpt/web-platform-tests/css/css-contain/contain-paint-013.html
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-002.html
@@ -3,27 +3,17 @@
 <title>CSS Containment Test: Paint containment independent formatting context</title>
 <link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
 <link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-paint">
-<link rel="match" href="reference/contain-paint-013-ref.html">
-<meta name=assert content="Paint containment elements establish an independent formatting context. The test checks that this feature of paint containment applies to blocks and inline blocks, but it doesn't apply to inline elements.">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-001-ref.html">
+<meta name=assert content="Paint containment elements establish an independent formatting context. The test checks that this feature of paint containment applies to inline blocks.">
 <style>
 .wrapper {
   border: solid thick;
   margin: 1em;
 }
 </style>
-<p>Test passes if on the first two boxes the top and bottom margins of the text line are double size than on the last box.</p>
-<div class="wrapper">
-  <div style="margin: 1em 0; contain: paint;">
-    <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
-  </div>
-</div>
+<p>Test passes if it has the same output than the reference.</p>
 <div class="wrapper">
   <span style="display: inline-block; margin: 1em 0; contain: paint;">
     <div style="margin: 1em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
   </span>
 </div>
-<div class="wrapper">
-  <span style="margin: 1em 0; contain: paint;">
-    <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
-  </span>
-</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-003.html b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-003.html
new file mode 100644
index 00000000000..fe1f7f2775d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-003.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Paint containment independent formatting context</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-paint">
+<link rel="match" href="reference/contain-paint-independent-formatting-context-003-ref.html">
+<meta name=assert content="Paint containment elements establish an independent formatting context. The test checks that this feature of paint containment does not appliy to inline elements.">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <span style="margin: 1em 0; contain: paint;">
+    <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
+  </span>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-013-ref.html b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-013-ref.html
deleted file mode 100644
index af758703a3b..00000000000
--- a/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-013-ref.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS Containment Test: Reference file</title>
-<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
-<style>
-.wrapper {
-  border: solid thick;
-  margin: 1em;
-}
-</style>
-<p>Test passes if on the first two boxes the top and bottom margins of the text line are double size than on the last box.</p>
-<div class="wrapper">
-  <div style="margin: 2em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
-</div>
-<div class="wrapper">
-  <div style="margin: 2em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
-</div>
-<div class="wrapper">
-  <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
-</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html
new file mode 100644
index 00000000000..08900b201b1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-001-ref.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Reference file</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <div style="margin: 2em 0;">This text should have 2em top and bottom margins (margins do not collapse).</div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html
new file mode 100644
index 00000000000..0cef592ba5c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-paint-independent-formatting-context-003-ref.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Reference file</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<style>
+.wrapper {
+  border: solid thick;
+  margin: 1em;
+}
+</style>
+<p>Test passes if it has the same output than the reference.</p>
+<div class="wrapper">
+  <div style="margin: 1em 0;">This text should have 1em top and bottom margins.</div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-invalid.html
new file mode 100644
index 00000000000..502a21c0160
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-invalid.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-basis with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-basis">
+<meta name="assert" content="flex-basis supports only the grammar 'content | <‘width’>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-basis", "none");
+test_invalid_value("flex-basis", "auto content");
+test_invalid_value("flex-basis", "-1px");
+test_invalid_value("flex-basis", "-2%");
+test_invalid_value("flex-basis", "3px 4%");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-valid.html
new file mode 100644
index 00000000000..25c91ad0597
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-basis-valid.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-basis with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-basis">
+<meta name="assert" content="flex-basis supports the full grammar 'content | <‘width’>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-basis", "1px");
+test_valid_value("flex-basis", "calc(2em + 3ex)");
+test_valid_value("flex-basis", "400%");
+test_valid_value("flex-basis", "auto");
+
+// The following is not yet supported by browsers:
+// test_valid_value("flex-basis", "content");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-invalid.html
new file mode 100644
index 00000000000..81fa8beb7ee
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-invalid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-direction with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-direction">
+<meta name="assert" content="flex-direction supports only the grammar 'row | row-reverse | column | column-reverse'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-direction", "auto");
+test_invalid_value("flex-direction", "column row-reverse");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-valid.html
new file mode 100644
index 00000000000..75e108478cb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-direction-valid.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-direction with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-direction">
+<meta name="assert" content="flex-direction supports the full grammar 'row | row-reverse | column | column-reverse'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-direction", "row");
+test_valid_value("flex-direction", "row-reverse");
+test_valid_value("flex-direction", "column");
+test_valid_value("flex-direction", "column-reverse");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-invalid.html
new file mode 100644
index 00000000000..e82c284632d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-invalid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-flow with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-flow">
+<meta name="assert" content="flex-flow supports only the grammar '<flex-direction> || <flex-wrap>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-flow", "nowrap row nowrap");
+test_invalid_value("flex-flow", "column wrap column");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-valid.html
new file mode 100644
index 00000000000..01acd435096
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-flow-valid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-flow with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-flow">
+<meta name="assert" content="flex-flow supports the full grammar '<flex-direction> || <flex-wrap>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-flow", "column nowrap");
+test_valid_value("flex-flow", "nowrap column", "column nowrap");
+test_valid_value("flex-flow", "wrap row-reverse", "row-reverse wrap");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-invalid.html
new file mode 100644
index 00000000000..7af51e77a85
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-invalid.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-grow with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-grow">
+<meta name="assert" content="flex-grow supports only the grammar '<number>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-grow", "2e3.4");
+test_invalid_value("flex-grow", "-+5");
+test_invalid_value("flex-grow", "6 7");
+
+test_invalid_value("flex-grow", "1."); // Accepted by Edge.
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-valid.html
new file mode 100644
index 00000000000..9abc79cb796
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-grow-valid.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-grow with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-grow">
+<meta name="assert" content="flex-grow supports the full grammar '<number>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-grow", "1");
+test_valid_value("flex-grow", "23.4e5", ["2.34e+06", "2.34e+006", "2340000"]);
+test_valid_value("flex-grow", "+.678E9", ["6.78e+08", "6.78e+008", "678000000"]);
+test_valid_value("flex-grow", ".0", "0");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-invalid.html
new file mode 100644
index 00000000000..ae010d7b4b4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-invalid.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex">
+<meta name="assert" content="flex supports only the grammar 'none | [ <‘flex-grow’> <‘flex-shrink’>? || <‘flex-basis’> ]'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex", "none 1");
+test_invalid_value("flex", "2 3 4");
+test_invalid_value("flex", "5px 7%");
+test_invalid_value("flex", "9 none");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-invalid.html
new file mode 100644
index 00000000000..9fa53de0513
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-invalid.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-shrink with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-shrink">
+<meta name="assert" content="flex-shrink supports only the grammar '<number>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-shrink", "2e3.4");
+test_invalid_value("flex-shrink", "-+5");
+test_invalid_value("flex-shrink", "6 7");
+
+test_invalid_value("flex-shrink", "1."); // Accepted by Edge.
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-valid.html
new file mode 100644
index 00000000000..1376e8a43ce
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-shrink-valid.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-shrink with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-shrink">
+<meta name="assert" content="flex-shrink supports the full grammar '<number>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-shrink", "1");
+test_valid_value("flex-shrink", "23.4e5", ["2.34e+06", "2.34e+006", "2340000"]);
+test_valid_value("flex-shrink", "+.678E9", ["6.78e+08", "6.78e+008", "678000000"]);
+test_valid_value("flex-shrink", ".0", "0");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-valid.html
new file mode 100644
index 00000000000..f3eaf118da6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-valid.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex">
+<meta name="assert" content="flex supports the full grammar 'none | [ <‘flex-grow’> <‘flex-shrink’>? || <‘flex-basis’> ]'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex", "none", "0 0 auto");
+test_valid_value("flex", "1", "1 1 0%");
+test_valid_value("flex", "2 3", "2 3 0%");
+test_valid_value("flex", "4 5 6px");
+test_valid_value("flex", "7% 8", "8 1 7%");
+test_valid_value("flex", "8 auto", "8 1 auto");
+
+// The following is not yet supported by browsers:
+// test_valid_value("flex", "content");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-invalid.html
new file mode 100644
index 00000000000..45b0029402b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-invalid.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-wrap with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-wrap">
+<meta name="assert" content="flex-wrap supports only the grammar 'nowrap | wrap | wrap-reverse'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("flex-wrap", "auto");
+test_invalid_value("flex-wrap", "nowrap wrap");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-valid.html
new file mode 100644
index 00000000000..a3a56cc2da0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/flex-wrap-valid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing flex-wrap with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-flex-wrap">
+<meta name="assert" content="flex-wrap supports the full grammar 'nowrap | wrap | wrap-reverse'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("flex-wrap", "nowrap");
+test_valid_value("flex-wrap", "wrap");
+test_valid_value("flex-wrap", "wrap-reverse");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-invalid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-invalid.html
new file mode 100644
index 00000000000..7a60396b681
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-invalid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing order with invalid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-order">
+<meta name="assert" content="order supports only the grammar '<integer>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("order", "auto");
+test_invalid_value("order", "123.45");
+test_invalid_value("order", "123 45");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-valid.html b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-valid.html
new file mode 100644
index 00000000000..fa101d7ee8d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/parsing/order-valid.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Flexible Box Layout Module Level 1: parsing order with valid values</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-order">
+<meta name="assert" content="order supports the full grammar '<integer>'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("order", "0");
+test_valid_value("order", "123");
+test_valid_value("order", "-45");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/abspos/absolute-positioning-grid-container-parent-001.html b/tests/wpt/web-platform-tests/css/css-grid/abspos/absolute-positioning-grid-container-parent-001.html
index e798b80d9d0..a7a38ad0a0a 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/abspos/absolute-positioning-grid-container-parent-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/abspos/absolute-positioning-grid-container-parent-001.html
@@ -41,19 +41,19 @@
 
 <div class="container relative">
   <div class="grid">
-    <div class="sizedToGridArea absolute autoRowAutoColumn" data-offset-x="35" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute autoRowAutoColumn" data-offset-x="50" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
 <div class="container relative">
   <div class="grid">
-    <div class="sizedToGridArea absolute firstRowFirstColumn" data-offset-x="35" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute firstRowFirstColumn" data-offset-x="50" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
 <div class="container relative">
   <div class="grid">
-    <div class="sizedToGridArea absolute secondRowSecondColumn" data-offset-x="35" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute secondRowSecondColumn" data-offset-x="50" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
@@ -77,19 +77,19 @@
 
 <div class="container relative">
   <div class="grid directionRTL">
-    <div class="sizedToGridArea absolute autoRowAutoColumn" data-offset-x="-135" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute autoRowAutoColumn" data-offset-x="-150" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
 <div class="container relative">
   <div class="grid directionRTL">
-    <div class="sizedToGridArea absolute firstRowFirstColumn" data-offset-x="-135" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute firstRowFirstColumn" data-offset-x="-150" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
 <div class="container relative">
   <div class="grid directionRTL">
-    <div class="sizedToGridArea absolute secondRowSecondColumn" data-offset-x="-135" data-offset-y="5" data-expected-width="500" data-expected-height="400"></div>
+    <div class="sizedToGridArea absolute secondRowSecondColumn" data-offset-x="-150" data-offset-y="10" data-expected-width="500" data-expected-height="400"></div>
   </div>
 </div>
 
diff --git a/tests/wpt/web-platform-tests/css/css-inline/META.yml b/tests/wpt/web-platform-tests/css/css-inline/META.yml
new file mode 100644
index 00000000000..323d367b923
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/META.yml
@@ -0,0 +1,4 @@
+spec: https://drafts.csswg.org/css-fonts/
+suggested_reviewers:
+  - dauwhe
+  - fantasai
diff --git a/tests/wpt/web-platform-tests/css/css-inline/inheritance.html b/tests/wpt/web-platform-tests/css/css-inline/inheritance.html
new file mode 100644
index 00000000000..f4c93b5b253
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/inheritance.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Inheritance of CSS Inline Layout properties</title>
+<link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-inline-3/#property-index">
+<meta name="assert" content="Properties inherit or not according to the spec.">
+<meta name="assert" content="Properties have initial values according to the spec.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/inheritance-testcommon.js"></script>
+</head>
+<body>
+<div id="container">
+<div id="target"></div>
+</div>
+<script>
+assert_not_inherited('alignment-baseline', 'baseline', 'central');
+assert_not_inherited('baseline-shift', '0px', '10px');
+assert_inherited('dominant-baseline', 'normal', 'central');
+assert_not_inherited('initial-letters', 'normal', '2 3');
+assert_inherited('initial-letters-align', 'alphabetic', 'hanging');
+assert_inherited('initial-letters-wrap', 'none', 'grid');
+assert_not_inherited('initial-sizing', 'normal', 'stretch');
+assert_not_inherited('vertical-align', 'baseline', '10px');
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-001.html b/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-001.html
new file mode 100644
index 00000000000..b6b6d245ab2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-001.html
@@ -0,0 +1,9 @@
+<link rel="help" href="https://drafts.csswg.org/css-tables-3/">
+<meta name="assert" content="This test checks that table cell children, in quirks mode, don't apply the percentage height quirk to their children." />
+<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
+<p style="margin-top: 1em;">Test passes if there is a filled green square.</p>
+<div style="display:table-cell; height:100px; background:green;">
+  <div style="width:100px;">
+    <div style="height:100%; background:red;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-002.html b/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-002.html
new file mode 100644
index 00000000000..a24556aa0de
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-tables/percentages-grandchildren-quirks-mode-002.html
@@ -0,0 +1,9 @@
+<link rel="help" href="https://drafts.csswg.org/css-tables-3/">
+<meta name="assert" content="This test checks that table cell children, in quirks mode, pass the correct percentage resolution size to their children." />
+<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
+<p style="margin-top: 1em;">Test passes if there is a filled green square.</p>
+<div style="display:table-cell; height:100px; background:red;">
+  <div style="width:100px; height: 100%;">
+    <div style="height:100%; background:green;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-text/hyphens/hyphens-auto-001.html b/tests/wpt/web-platform-tests/css/css-text/hyphens/hyphens-auto-001.html
new file mode 100644
index 00000000000..39814d3e18c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/hyphens/hyphens-auto-001.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Text Test: no automatic hyphenation without language tagging</title>
+<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
+<link rel="help" href="https://drafts.csswg.org/css-text-3/#hyphens-property">
+<meta name="flags" content="">
+<link rel="match" href="reference/hyphens-auto-001-ref.html">
+<meta name="assert" content="automatic hyphenation must not work without language tagging">
+<style>
+div {
+  width: 4ch;
+  hyphens: auto;
+}
+</style>
+
+<p>Test passes if none of the words below are hyphenated.
+<div>implementation
+initialization
+realization
+hyphenation
+anticonstitutionnellement
+intergouvernementalisation
+dichlorodiphényltrichloroéthane
+honorificabilitudinitatibus
+Wiedervereinigung
+Rechtsschutzversicherungsgesellschaften</div>
+
diff --git a/tests/wpt/web-platform-tests/css/css-text/hyphens/reference/hyphens-auto-001-ref.html b/tests/wpt/web-platform-tests/css/css-text/hyphens/reference/hyphens-auto-001-ref.html
new file mode 100644
index 00000000000..c1355d0abba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/hyphens/reference/hyphens-auto-001-ref.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Text Test Reference</title>
+<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
+<style>
+div { white-space: pre; }
+</style>
+
+<p>Test passes if none of the words below are hyphenated.
+<div>implementation
+initialization
+realization
+hyphenation
+anticonstitutionnellement
+intergouvernementalisation
+dichlorodiphényltrichloroéthane
+honorificabilitudinitatibus
+Wiedervereinigung
+Rechtsschutzversicherungsgesellschaften</div>
+
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/historical.html b/tests/wpt/web-platform-tests/css/css-transitions/historical.html
new file mode 100644
index 00000000000..8d0360a8ecf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transitions/historical.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+
+<title>Historical CSS Transition features must be removed</title>
+<link rel="help" href="http://www.w3.org/TR/css3-transitions">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+function isInterfaceNuked(name) {
+  test(function() {
+    assert_equals(window[name], undefined)
+  }, "Historical CSS features must be removed: " + name)
+}
+var nukedInterfaces = [
+  "WebKitTransitionEvent", // Replaced by unprefixed TransitionEvent
+];
+nukedInterfaces.forEach(isInterfaceNuked);
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/inheritance.html b/tests/wpt/web-platform-tests/css/css-transitions/inheritance.html
new file mode 100644
index 00000000000..986436950e4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transitions/inheritance.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Inheritance of CSS Transitions properties</title>
+<link rel="help" href="https://drafts.csswg.org/css-transitions/#property-index">
+<meta name="assert" content="Properties inherit or not according to the spec.">
+<meta name="assert" content="Properties have initial values according to the spec.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/inheritance-testcommon.js"></script>
+</head>
+<body>
+<div id="container">
+<div id="target"></div>
+</div>
+<script>
+assert_not_inherited('transition-delay', '0s', '2s');
+assert_not_inherited('transition-duration', '0s', '3s');
+assert_not_inherited('transition-property', 'all', 'opacity');
+assert_not_inherited('transition-timing-function', 'ease', 'linear');
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-absolute.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-absolute.html
new file mode 100644
index 00000000000..196f5f26f31
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-absolute.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties for absolute positioning</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests, containerForAbspos} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "position: absolute",
+  containingBlockElement: containerForAbspos,
+  containingBlockArea: "padding",
+  preservesPercentages: false,
+  preservesAuto: false,
+  canStretchAutoSize: true,
+  staticPositionY: 1 + 2 + 4 + 8,
+  staticPositionX: 2 + 4 + 8 + 16,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-fixed.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-fixed.html
new file mode 100644
index 00000000000..e57e774fe6e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-fixed.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties for fixed positioning</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests, containerForFixed} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "position: fixed",
+  containingBlockElement: containerForFixed,
+  containingBlockArea: "padding",
+  preservesPercentages: false,
+  preservesAuto: false,
+  canStretchAutoSize: true,
+  staticPositionY: 1 + 2 + 4 + 8 + 16 + 32 + 64,
+  staticPositionX: 2 + 4 + 8 + 16 + 32 + 64 + 128,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-nobox.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-nobox.html
new file mode 100644
index 00000000000..ca55ace7f4e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-nobox.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties when the element generates no box</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "display: none",
+  containingBlockElement: null,
+  preservesPercentages: true,
+  preservesAuto: true,
+  canStretchAutoSize: false,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-relative.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-relative.html
new file mode 100644
index 00000000000..c48f2eb555e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-relative.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties for relative positioning</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests, containerForInflow} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "position: relative",
+  containingBlockElement: containerForInflow,
+  containingBlockArea: "content",
+  preservesPercentages: false,
+  preservesAuto: false,
+  canStretchAutoSize: false,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-static.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-static.html
new file mode 100644
index 00000000000..854a8e3dba4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-static.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties for static positioning</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests, containerForInflow} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "position: static",
+  containingBlockElement: containerForInflow,
+  containingBlockArea: "content",
+  preservesPercentages: true,
+  preservesAuto: true,
+  canStretchAutoSize: false,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-sticky.html b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-sticky.html
new file mode 100644
index 00000000000..10520232d73
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/getComputedStyle-insets-sticky.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSSOM: resolved values of the inset properties for sticky positioning</title>
+<link rel="help" href="https://drafts.csswg.org/cssom/#resolved-value">
+<link rel="help" href="https://drafts.csswg.org/css-position/#pos-sch">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@crisal.io">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script type="module">
+import {runTests, containerForInflow} from "./support/getComputedStyle-insets.js";
+runTests({
+  style: "position: sticky; position: -webkit-sticky",
+  containingBlockElement: containerForInflow,
+  containingBlockArea: "content",
+  preservesPercentages: false,
+  preservesAuto: true,
+  canStretchAutoSize: false,
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/cssom/shorthand-serialization.html b/tests/wpt/web-platform-tests/css/cssom/shorthand-serialization.html
index 44af6737e3e..97e11da8b8a 100644
--- a/tests/wpt/web-platform-tests/css/cssom/shorthand-serialization.html
+++ b/tests/wpt/web-platform-tests/css/cssom/shorthand-serialization.html
@@ -70,8 +70,17 @@
             const testElem = document.getElementById("test");
             testElem.style.setProperty("margin-top", "initial", "important");
             assert_equals(testElem.style.margin, "");
-            assert_equals(testElem.style.cssText, "margin-top: initial !important; margin-right: initial; margin-bottom: initial; margin-left: initial;");
         }, "Shorthand serialization with 'initial' value, one longhand with important flag.");
+
+        test(function() {
+            const testElem = document.getElementById("test");
+            testElem.style.cssText = "";
+            testElem.style.setProperty("margin-top", "initial");
+            testElem.style.setProperty("margin-right", "initial");
+            testElem.style.setProperty("margin-bottom", "initial");
+            testElem.style.setProperty("margin-left", "initial", "important");
+            assert_equals(testElem.style.margin, "");
+        }, "Shorthand serialization with 'initial' value, longhands set individually, one with important flag.");
     </script>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/cssom/support/getComputedStyle-insets.js b/tests/wpt/web-platform-tests/css/cssom/support/getComputedStyle-insets.js
new file mode 100644
index 00000000000..7bd34fe87a2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/cssom/support/getComputedStyle-insets.js
@@ -0,0 +1,376 @@
+export const testEl = document.createElement("div");
+export const containerForInflow = document.createElement("div");
+export const containerForAbspos = document.createElement("div");
+export const containerForFixed = document.createElement("div");
+
+testEl.id = "test";
+containerForInflow.id = "container-for-inflow";
+containerForAbspos.id = "container-for-abspos";
+containerForFixed.id = "container-for-fixed";
+
+containerForInflow.appendChild(testEl);
+containerForAbspos.appendChild(containerForInflow);
+containerForFixed.appendChild(containerForAbspos);
+document.body.appendChild(containerForFixed);
+
+const stylesheet = document.createElement("style");
+stylesheet.textContent = `
+  #container-for-inflow {
+    /* Content area: 100px tall, 200px wide */
+    height: 100px;
+    width: 200px;
+    padding: 1px 2px;
+    border-width: 2px 4px;
+    margin: 4px 8px;
+    overflow: hidden;
+  }
+  #container-for-abspos {
+    /* Padding area: 200px tall, 400px wide */
+    height: 184px;
+    width: 368px;
+    padding: 8px 16px;
+    border-width: 16px 32px;
+    margin: 32px 64px;
+    position: relative;
+  }
+  #container-for-fixed {
+    /* Padding area: 300px tall, 600px wide */
+    height: 172px;
+    width: 344px;
+    padding: 64px 128px;
+    border-width: 128px 256px;
+    margin: 256px 512px;
+    position: absolute;
+    transform: scale(1);
+    visibility: hidden;
+  }
+  [id ^= container] {
+    border-style: solid;
+  }
+`;
+document.head.appendChild(stylesheet);
+
+function runTestsWithWM(data, testWM, cbWM) {
+  const {
+    style,
+    containingBlockElement,
+    containingBlockArea,
+    preservesPercentages,
+    preservesAuto,
+    canStretchAutoSize,
+    staticPositionX,
+    staticPositionY,
+  } = data;
+
+  let cbHeight = containingBlockElement ? containingBlockElement.clientHeight : NaN;
+  let cbWidth = containingBlockElement ? containingBlockElement.clientWidth : NaN;
+  if (containingBlockElement && containingBlockArea == "content") {
+    const cs = getComputedStyle(containingBlockElement);
+    cbHeight -= parseFloat(cs.paddingTop) + parseFloat(cs.paddingBottom);
+    cbWidth -= parseFloat(cs.paddingLeft) + parseFloat(cs.paddingRight);
+  }
+
+  const staticPositionTop = cbWM.blockStart == "top" || cbWM.inlineStart == "top"
+    ? staticPositionY : cbHeight - staticPositionY;
+  const staticPositionLeft = cbWM.blockStart == "left" || cbWM.inlineStart == "left"
+    ? staticPositionX : cbWidth - staticPositionX;
+  const staticPositionBottom = cbWM.blockStart == "bottom" || cbWM.inlineStart == "bottom"
+    ? staticPositionY : cbHeight - staticPositionY;
+  const staticPositionRight = cbWM.blockStart == "right" || cbWM.inlineStart == "right"
+    ? staticPositionX : cbWidth - staticPositionX;
+
+  function serialize(declarations) {
+    return Object.entries(declarations).map(([p, v]) => `${p}: ${v}; `).join("");
+  }
+
+  function wmName(wm) {
+    return Object.values(wm.style).join(" ");
+  }
+
+  function checkStyle(declarations, expected, msg) {
+    test(function() {
+      testEl.style.cssText = style + "; " + serialize({...declarations, ...testWM.style});
+      if (containingBlockElement) {
+        containingBlockElement.style.cssText = serialize({...cbWM.style});
+      }
+      const cs = getComputedStyle(testEl);
+      for (let [prop, value] of Object.entries(expected)) {
+        assert_equals(cs[prop], value, `'${prop}'`);
+      }
+    }, `${wmName(testWM)} inside ${wmName(cbWM)} - ${msg}`);
+
+    testEl.style.cssText = "";
+    if (containingBlockElement) {
+      containingBlockElement.style.cssText = "";
+    }
+  }
+
+  checkStyle({
+    top: "1px",
+    left: "2px",
+    bottom: "3px",
+    right: "4px",
+  }, {
+    top: "1px",
+    left: "2px",
+    bottom: "3px",
+    right: "4px",
+  }, "Pixels resolve as-is");
+
+  checkStyle({
+    top: "1em",
+    left: "2em",
+    bottom: "3em",
+    right: "4em",
+    "font-size": "10px",
+  }, {
+    top: "10px",
+    left: "20px",
+    bottom: "30px",
+    right: "40px",
+  }, "Relative lengths are absolutized into pixels");
+
+  if (preservesPercentages) {
+    checkStyle({
+      top: "10%",
+      left: "25%",
+      bottom: "50%",
+      right: "75%",
+    }, {
+      top: "10%",
+      left: "25%",
+      bottom: "50%",
+      right: "75%",
+    }, "Percentages resolve as-is");
+  } else {
+    checkStyle({
+      top: "10%",
+      left: "25%",
+      bottom: "50%",
+      right: "75%",
+    }, {
+      top: .1 * cbHeight + "px",
+      left: .25 * cbWidth + "px",
+      bottom: .5 * cbHeight + "px",
+      right: .75 * cbWidth + "px",
+    }, "Percentages are absolutized into pixels");
+
+    checkStyle({
+      top: "calc(10% - 1px)",
+      left: "calc(25% - 2px)",
+      bottom: "calc(50% - 3px)",
+      right: "calc(75% - 4px)",
+    }, {
+      top: .1 * cbHeight - 1 + "px",
+      left: .25 * cbWidth - 2 + "px",
+      bottom: .5 * cbHeight - 3 + "px",
+      right: .75 * cbWidth - 4 + "px",
+    }, "calc() is absolutized into pixels");
+  }
+
+  if (canStretchAutoSize) {
+    // Force overconstraintment by setting size or with insets that would result in
+    // negative size. Then the resolved value should be the computed one according to
+    // https://drafts.csswg.org/cssom/#resolved-value-special-case-property-like-top
+
+    checkStyle({
+      top: "1px",
+      left: "2px",
+      bottom: "3px",
+      right: "4px",
+      height: "0px",
+      width: "0px",
+    }, {
+      top: "1px",
+      left: "2px",
+      bottom: "3px",
+      right: "4px",
+    }, "Pixels resolve as-is when overconstrained");
+
+    checkStyle({
+      top: "100%",
+      left: "100%",
+      bottom: "100%",
+      right: "100%",
+    }, {
+      top: cbHeight + "px",
+      left: cbWidth + "px",
+      bottom: cbHeight + "px",
+      right: cbWidth + "px",
+    }, "Percentages absolutize the computed value when overconstrained");
+  }
+
+  if (preservesAuto) {
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "3px",
+      right: "4px",
+    }, {
+      top: "auto",
+      left: "auto",
+      bottom: "3px",
+      right: "4px",
+    }, "If start side is 'auto' and end side is not, 'auto' resolves as-is");
+
+    checkStyle({
+      top: "1px",
+      left: "2px",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: "1px",
+      left: "2px",
+      bottom: "auto",
+      right: "auto",
+    }, "If end side is 'auto' and start side is not, 'auto' resolves as-is");
+
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: "auto",
+      left: "auto",
+      bottom: "auto",
+      right: "auto",
+    }, "If opposite sides are 'auto', they resolve as-is");
+  } else if (canStretchAutoSize) {
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "3px",
+      right: "4px",
+    }, {
+      top: cbHeight - 3 + "px",
+      left: cbWidth - 4 + "px",
+      bottom: "3px",
+      right: "4px",
+    }, "If start side is 'auto' and end side is not, 'auto' resolves to used value");
+
+    checkStyle({
+      top: "1px",
+      left: "2px",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: "1px",
+      left: "2px",
+      bottom: cbHeight - 1 + "px",
+      right: cbWidth - 2 + "px",
+    }, "If end side is 'auto' and start side is not, 'auto' resolves to used value");
+
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: staticPositionTop + "px",
+      left: staticPositionLeft + "px",
+      bottom: staticPositionBottom + "px",
+      right: staticPositionRight + "px",
+    }, "If opposite sides are 'auto', they resolve to used value");
+  } else {
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "3px",
+      right: "4px",
+    }, {
+      top: "-3px",
+      left: "-4px",
+      bottom: "3px",
+      right: "4px",
+    }, "If start side is 'auto' and end side is not, 'auto' resolves to used value");
+
+    checkStyle({
+      top: "1px",
+      left: "2px",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: "1px",
+      left: "2px",
+      bottom: "-1px",
+      right: "-2px",
+    }, "If end side is 'auto' and start side is not, 'auto' resolves to used value");
+
+    checkStyle({
+      top: "auto",
+      left: "auto",
+      bottom: "auto",
+      right: "auto",
+    }, {
+      top: "0px",
+      left: "0px",
+      bottom: "0px",
+      right: "0px",
+    }, "If opposite sides are 'auto', they resolve to used value");
+  }
+}
+
+const writingModes = [{
+  style: {
+    "writing-mode": "horizontal-tb",
+    "direction": "ltr",
+  },
+  blockStart: "top",
+  blockEnd: "bottom",
+  inlineStart: "left",
+  inlineEnd: "right",
+}, {
+  style: {
+    "writing-mode": "horizontal-tb",
+    "direction": "rtl",
+  },
+  blockStart: "top",
+  blockEnd: "bottom",
+  inlineStart: "right",
+  inlineEnd: "left",
+}, {
+  style: {
+    "writing-mode": "vertical-lr",
+    "direction": "ltr",
+  },
+  blockStart: "left",
+  blockEnd: "right",
+  inlineStart: "top",
+  inlineEnd: "bottom",
+}, {
+  style: {
+    "writing-mode": "vertical-lr",
+    "direction": "rtl",
+  },
+  blockStart: "left",
+  blockEnd: "right",
+  inlineStart: "bottom",
+  inlineEnd: "top",
+}, {
+  style: {
+    "writing-mode": "vertical-rl",
+    "direction": "ltr",
+  },
+  blockStart: "right",
+  blockEnd: "left",
+  inlineStart: "top",
+  inlineEnd: "bottom",
+}, {
+  style: {
+    "writing-mode": "vertical-rl",
+    "direction": "rtl",
+  },
+  blockStart: "right",
+  blockEnd: "left",
+  inlineStart: "bottom",
+  inlineEnd: "top",
+}];
+
+export function runTests(data) {
+  for (let testWM of writingModes) {
+    for (let cbWM of writingModes) {
+      runTestsWithWM(data, testWM, cbWM);
+    }
+  }
+}
diff --git a/tests/wpt/web-platform-tests/css/support/inheritance-testcommon.js b/tests/wpt/web-platform-tests/css/support/inheritance-testcommon.js
new file mode 100644
index 00000000000..50bf4c3ae2b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/support/inheritance-testcommon.js
@@ -0,0 +1,54 @@
+'use strict';
+
+function assert_initial(property, initial) {
+  test(() => {
+    if (!getComputedStyle(target)[property])
+      return;
+    target.style[property] = 'initial';
+    assert_equals(getComputedStyle(target)[property], initial);
+    target.style[property] = '';
+  }, 'Property ' + property + ' has initial value ' + initial);
+}
+
+function assert_inherited(property, initial, other) {
+  assert_initial(property, initial);
+
+  test(() => {
+    if (!getComputedStyle(target)[property])
+      return;
+    container.style[property] = 'initial';
+    target.style[property] = 'unset';
+    assert_not_equals(getComputedStyle(container)[property], other);
+    assert_not_equals(getComputedStyle(target)[property], other);
+    container.style[property] = other;
+    assert_equals(getComputedStyle(container)[property], other);
+    assert_equals(getComputedStyle(target)[property], other);
+    target.style[property] = 'initial';
+    assert_not_equals(getComputedStyle(container)[property], other);
+    assert_not_equals(getComputedStyle(target)[property], other);
+    target.style[property] = 'inherit';
+    assert_equals(getComputedStyle(container)[property], other);
+    container.style[property] = '';
+    target.style[property] = '';
+  }, 'Property ' + property + ' inherits');
+}
+
+function assert_not_inherited(property, initial, other) {
+  assert_initial(property, initial);
+
+  test(() => {
+    if (!getComputedStyle(target)[property])
+      return;
+    container.style[property] = 'initial';
+    target.style[property] = 'unset';
+    assert_not_equals(getComputedStyle(container)[property], other);
+    assert_not_equals(getComputedStyle(target)[property], other);
+    container.style[property] = other;
+    assert_equals(getComputedStyle(container)[property], other);
+    assert_not_equals(getComputedStyle(target)[property], other);
+    target.style[property] = 'inherit';
+    assert_equals(getComputedStyle(target)[property], other);
+    container.style[property] = '';
+    target.style[property] = '';
+  }, 'Property ' + property + ' does not inherit');
+}
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-002-ref.html
index 376e0086f85..40dd0f2f517 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-002-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 32px;
-      width: 26px;
+      height: 30px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
     }
 
     .container > * {
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-img-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-img-002-ref.html
index cba35db9970..ea15f8de198 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-img-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-img-002-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 42px;
-      width: 26px;
+      height: 40px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
       margin-bottom: 20px; /* to reduce overlap between overflowing images */
     }
 
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-003-ref.html
index dc3d2bc4623..cadaadd95a3 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-003-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 32px;
-      width: 26px;
+      height: 30px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
     }
 
     .container > * {
@@ -33,8 +34,8 @@
       height: 6px;
       width: 8px;
     }
-    .big   > .container > * { margin-left: 18px; }
-    .small > .container > * { margin-left:  0px; }
+    .big   > .container > * { margin-left: 14px; }
+    .small > .container > * { margin-left: -4px; }
 
     .big   .alignStart  { margin-top:  0px; }
     .big   .alignCenter { margin-top: 13px; }
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-004-ref.html
index dc3d2bc4623..cadaadd95a3 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-rtl-004-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 32px;
-      width: 26px;
+      height: 30px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
     }
 
     .container > * {
@@ -33,8 +34,8 @@
       height: 6px;
       width: 8px;
     }
-    .big   > .container > * { margin-left: 18px; }
-    .small > .container > * { margin-left:  0px; }
+    .big   > .container > * { margin-left: 14px; }
+    .small > .container > * { margin-left: -4px; }
 
     .big   .alignStart  { margin-top:  0px; }
     .big   .alignCenter { margin-top: 13px; }
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-003-ref.html
index 8877789be1c..7eca626d2df 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-003-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 32px;
-      height: 26px;
+      width: 30px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-right: 10px; /* To avoid overlap between overflowing kids */
     }
 
@@ -34,12 +35,12 @@
       width: 6px;
       height: 8px;
     }
-    .big   .alignStart  { margin-left: 26px; }
-    .big   .alignCenter { margin-left: 13px; }
-    .big   .alignEnd    { margin-left:  0px; }
-    .small .alignStart  { margin-left: -2px; }
-    .small .alignCenter { margin-left: -1px; }
-    .small .alignEnd    { margin-left:  0px; }
+    .big   .alignStart  { margin-left: 24px; }
+    .big   .alignCenter { margin-left: 11px; }
+    .big   .alignEnd    { margin-left: -2px; }
+    .small .alignStart  { margin-left: -4px; }
+    .small .alignCenter { margin-left: -3px; }
+    .small .alignEnd    { margin-left: -2px; }
   </style>
 </head>
 <body>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-004-ref.html
index 54d6d46f820..66d0d29f3c3 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-align-self-vertWM-004-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 32px;
-      height: 26px;
+      width: 30px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-right: 10px; /* To avoid overlap between overflowing kids */
     }
 
@@ -34,12 +35,12 @@
       width: 6px;
       height: 8px;
     }
-    .big   .alignStart  { margin-left: 26px; }
-    .big   .alignCenter { margin-left: 13px; }
-    .big   .alignEnd    { margin-left:  0px; }
-    .small .alignStart  { margin-left: -2px; }
-    .small .alignCenter { margin-left: -1px; }
-    .small .alignEnd    { margin-left:  0px; }
+    .big   .alignStart  { margin-left: 24px; }
+    .big   .alignCenter { margin-left: 11px; }
+    .big   .alignEnd    { margin-left: -2px; }
+    .small .alignStart  { margin-left: -4px; }
+    .small .alignCenter { margin-left: -3px; }
+    .small .alignEnd    { margin-left: -2px; }
   </style>
 </head>
 <body>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
index 741a795f20e..f7396eda984 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-002-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 32px;
-      height: 26px;
+      width: 30px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-right: 10px; /* To avoid overlap between overflowing kids */
     }
 
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
index a1d4e8163fd..e71555d4294 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-img-002-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 42px;
-      height: 26px;
+      width: 40px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-bottom: 20px; /* to reduce overlap between overflowing images */
     }
 
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
index b38590c8021..8c88ad97b9c 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-003-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 32px;
-      height: 26px;
+      width: 30px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-right: 10px; /* To avoid overlap between overflowing kids */
     }
 
@@ -34,12 +35,12 @@
       width: 6px;
       height: 8px;
     }
-    .big   .alignStart  { margin-left: 26px; }
-    .big   .alignCenter { margin-left: 13px; }
-    .big   .alignEnd    { margin-left:  0px; }
-    .small .alignStart  { margin-left: -2px; }
-    .small .alignCenter { margin-left: -1px; }
-    .small .alignEnd    { margin-left:  0px; }
+    .big   .alignStart  { margin-left: 24px; }
+    .big   .alignCenter { margin-left: 11px; }
+    .big   .alignEnd    { margin-left: -2px; }
+    .small .alignStart  { margin-left: -4px; }
+    .small .alignCenter { margin-left: -3px; }
+    .small .alignEnd    { margin-left: -2px; }
   </style>
 </head>
 <body>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
index 1ebc9e62c97..3e4c10049db 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-rtl-004-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 2px 1px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      width: 32px;
-      height: 26px;
+      width: 30px;
+      height: 22px;
     }
     .small > .container {
-      width: 4px;
-      height: 8px;
+      width: 2px;
+      height: 4px;
       margin-right: 10px; /* To avoid overlap between overflowing kids */
     }
 
@@ -34,12 +35,12 @@
       width: 6px;
       height: 8px;
     }
-    .big   .alignStart  { margin-left: 26px; }
-    .big   .alignCenter { margin-left: 13px; }
-    .big   .alignEnd    { margin-left:  0px; }
-    .small .alignStart  { margin-left: -2px; }
-    .small .alignCenter { margin-left: -1px; }
-    .small .alignEnd    { margin-left:  0px; }
+    .big   .alignStart  { margin-left: 24px; }
+    .big   .alignCenter { margin-left: 11px; }
+    .big   .alignEnd    { margin-left: -2px; }
+    .small .alignStart  { margin-left: -4px; }
+    .small .alignCenter { margin-left: -3px; }
+    .small .alignEnd    { margin-left: -2px; }
   </style>
 </head>
 <body>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
index 15507845661..c0d0b784415 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-003-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 32px;
-      width: 26px;
+      height: 30px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
     }
 
     .container > * {
@@ -33,8 +34,8 @@
       height: 6px;
       width: 8px;
     }
-    .big   > .container > * { margin-left: 18px; }
-    .small > .container > * { margin-left:  0px; }
+    .big   > .container > * { margin-left: 14px; }
+    .small > .container > * { margin-left: -4px; }
 
     .big   .alignStart  { margin-top:  0px; }
     .big   .alignCenter { margin-top: 13px; }
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
index 15507845661..c0d0b784415 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/align3/grid-abspos-staticpos-justify-self-vertWM-004-ref.html
@@ -11,6 +11,7 @@
   <style>
     .container {
       display: block;
+      padding: 1px 2px;
       border: 1px solid black;
       background: yellow;
       margin-bottom: 5px;
@@ -20,12 +21,12 @@
     br { clear: both }
 
     .big > .container {
-      height: 32px;
-      width: 26px;
+      height: 30px;
+      width: 22px;
     }
     .small > .container {
-      height: 4px;
-      width: 8px;
+      height: 2px;
+      width: 4px;
     }
 
     .container > * {
@@ -33,8 +34,8 @@
       height: 6px;
       width: 8px;
     }
-    .big   > .container > * { margin-left: 18px; }
-    .small > .container > * { margin-left:  0px; }
+    .big   > .container > * { margin-left: 14px; }
+    .small > .container > * { margin-left: -4px; }
 
     .big   .alignStart  { margin-top:  0px; }
     .big   .alignCenter { margin-top: 13px; }
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/reftest.list
index f931e37deae..3a48ae4bdac 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/reftest.list
@@ -16,7 +16,7 @@
 == descriptor-prefix.html   descriptor-prefix-ref.html
 == descriptor-suffix.html   descriptor-suffix-ref.html
 == descriptor-range.html    descriptor-range-ref.html
-== descriptor-pad.html      descriptor-pad-ref.html
+== descriptor-pad.html descriptor-pad-ref.html
 == descriptor-fallback.html descriptor-fallback-ref.html
 == descriptor-symbols.html  descriptor-symbols-ref.html
 == descriptor-negative-invalid.html descriptor-negative-invalid-ref.html
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/images3/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/images3/reftest.list
index f7429e37201..1a21c76db1c 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/images3/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/images3/reftest.list
@@ -191,4 +191,4 @@
 == object-position-svg-002p.html object-position-svg-002-ref.html
 
 # Tests for gradient color stops with 'currentcolor'
-== color-stop-currentcolor.html color-stop-currentcolor-ref.html
\ No newline at end of file
+== color-stop-currentcolor.html color-stop-currentcolor-ref.html
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/text-decor-3/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/text-decor-3/reftest.list
index 8d1b308ec9c..42f029ce03d 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/text-decor-3/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/text-decor-3/reftest.list
@@ -132,4 +132,4 @@
 == text-emphasis-line-height-001z.html text-emphasis-line-height-001-ref.html
 
 # text-shadow 'currentcolor' test cases
-== text-shadow-currentcolor.html text-shadow-currentcolor-ref.html
\ No newline at end of file
+== text-shadow-currentcolor.html text-shadow-currentcolor-ref.html
diff --git a/tests/wpt/web-platform-tests/custom-elements/parser/parser-custom-element-in-foreign-content.html b/tests/wpt/web-platform-tests/custom-elements/parser/parser-custom-element-in-foreign-content.html
new file mode 100644
index 00000000000..2ae0f1309c6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/custom-elements/parser/parser-custom-element-in-foreign-content.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<title>Custom Elements: Custom element in foreign content</title>
+<meta name="assert" content="HTML parser should not create non-HTML namespace custom elements">
+<link rel="help" href="https://html.spec.whatwg.org/#create-an-element-for-the-token">
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+class ThrowsException extends HTMLElement {
+  constructor() {
+    throw 'Bad';
+  }
+};
+customElements.define('throws-exception', ThrowsException);
+</script>
+<svg>
+  <throws-exception/>
+</svg>
+<script>
+test(function () {
+  var instance = document.querySelector('throws-exception');
+  assert_false(instance instanceof ThrowsException,
+               'The HTML parser must NOT instantiate a custom element in non-HTML namespaces');
+  assert_false(instance instanceof HTMLUnknownElement, 'The HTML parser should not fallback');
+  assert_true(instance instanceof SVGElement,
+              'The element created by the HTML parser must be an instance of SVGElement');
+}, 'HTML parser should not create custom elements in non-HTML namespaces');
+</script>
diff --git a/tests/wpt/web-platform-tests/docs/_writing-tests/lint-tool.md b/tests/wpt/web-platform-tests/docs/_writing-tests/lint-tool.md
index d818f4b0b38..498df7f293d 100644
--- a/tests/wpt/web-platform-tests/docs/_writing-tests/lint-tool.md
+++ b/tests/wpt/web-platform-tests/docs/_writing-tests/lint-tool.md
@@ -58,7 +58,7 @@ below to fix all errors reported.
   element whose `content` attribute has a malformed value; **fix**: ensure
   the value of the `content` attribute starts with `?` or `#` or is empty.
 
-* **MISSING-LINK**: CSS test file is missing a link to a spec. **fix**: Ensure that there is a `<link rel="help" src="[url]">` for the spec.
+* **MISSING-LINK**: CSS test file is missing a link to a spec. **fix**: Ensure that there is a `<link rel="help" href="[url]">` for the spec.
   * Note: `MISSING-LINK` is designed to ensure that the CSS build tool can find the tests. Note that the CSS build system is primarily used by [test.csswg.org/](http://test.csswg.org/), which doesn't use `wptserve`, so `*.any.js` and similar tests won't work there; stick with the `.html` equivalent.
 
 * **MISSING-TESTHARNESSREPORT**: Test file is missing an instance of
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html
new file mode 100644
index 00000000000..5b9034b6384
--- /dev/null
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html
@@ -0,0 +1,93 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 400px;
+  height: 400px;
+  margin: 10px;
+}
+
+.spacer {
+  width: 100%;
+  height: 300%;
+}
+</style>
+<div class="spacer"></div>
+<script>
+  let cross_origin_url =
+      "http://{{hosts[alt][www]}}:{{ports[http][0]}}/" +
+      "feature-policy/experimental-features/resources/lazyload-contents.html";
+
+  let load_timeout = 400; // ms
+  let expected_timeout_msg = false;
+
+  window.scrollTo(0, 0);
+
+  // Sanity-check: Make sure lazyload='on' works as intended.
+  promise_test(async(t) => {
+    // Add a frame with lazyload="on".
+    let frame_on = createIframe(document.body, {
+        id: "ON",
+        lazyload: "on",
+        src: `${cross_origin_url}?id=ON`
+      });
+    // Sanity-check: The frame is not visible.
+    assert_greater_than(
+        frame_on.getBoundingClientRect().top,
+        window.innerHeight * 2,
+        "Unexpected position for <iframe> with ID 'ON'.");
+    let msg_or_timeout_attr_on =
+        await waitForMessageOrTimeout(t, "ON", load_timeout);
+    assert_equals(msg_or_timeout_attr_on,
+                  expected_timeout_msg,
+                  "With lazyload='on', the frame should not load.");
+  }, "Sanity-check: Contents do not load immediately (no eager-loading) " +
+     "when the lazyload attribute is 'on' and frame is in viewport.");
+
+
+  // Verify that when 'lazyload' policy is disabled,  lazyload='off' and
+  // lazyload='auto' behave the same.
+  promise_test(async(t) => {
+    // Add a frame with lazyload="off".
+    let frame_on = createIframe(document.body, {
+        id: "OFF",
+        lazyload: "off",
+        src: `${cross_origin_url}?id=OFF`
+      });
+    // Sanity-check: The frame is not visible.
+    assert_greater_than(
+        frame_on.getBoundingClientRect().top,
+        window.innerHeight * 2,
+        "Unexpected position for <iframe> with ID 'OFF'.");
+    let msg_or_timeout_attr_off =
+        await waitForMessageOrTimeout(t, "OFF", load_timeout);
+
+    // Now do the same for lazyload='auto'.
+    let frame_auto = createIframe(document.body, {
+        id: "AUTO",
+        lazyload: "auto",
+        src: `${cross_origin_url}?id=AUTO`
+    });
+    // Sanity-check: The frame is not visible.
+    assert_greater_than(
+        frame_on.getBoundingClientRect().top,
+        window.innerHeight * 2,
+        "Unexpected position for <iframe> with ID 'AUTO'.");
+    let msg_or_timeout_attr_auto =
+        await waitForMessageOrTimeout(t, "AUTO", load_timeout);
+
+    // The result should be the same.
+    assert_equals(
+          msg_or_timeout_attr_off,
+          msg_or_timeout_attr_auto,
+          "lazyload='off' not treated as 'auto'.");
+  }, "When 'lazyload' feature is disabled, a frame cannot avoid lazyloading " +
+     "by setting 'lazyload' attribute to 'off'");
+</script>
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html.headers b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html.headers
new file mode 100644
index 00000000000..d0bac47e01a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-disabled-tentative.sub.html.headers
@@ -0,0 +1 @@
+Feature-Policy: lazyload 'none'
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html
new file mode 100644
index 00000000000..2e0a791f374
--- /dev/null
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/feature-policy/experimental-features/resources/common.js"></script>
+<style>
+html, body {
+  height: 100%;
+  width: 100%;
+}
+
+iframe {
+  width: 400px;
+  height: 400px;
+  margin: 10px;
+}
+
+.spacer {
+  width: 100%;
+  height: 300%;
+}
+</style>
+<div class="spacer"></div>
+<script>
+  let cross_origin_url =
+      "http://{{hosts[alt][www]}}:{{ports[http][0]}}/" +
+      "feature-policy/experimental-features/resources/lazyload-contents.html";
+
+  let load_timeout = 400; // ms
+  let expected_timeout_msg = false;
+  let expected_load_msg = "This page is lazyloaded.";
+
+  window.scrollTo(0, 0);
+
+  // Sanity-check: Make sure lazyload='on' works as intended.
+  promise_test(async(t) => {
+    // Add a frame with lazyload="on".
+    let frame_on = createIframe(document.body, {
+        id: "ON",
+        lazyload: "on",
+        src: `${cross_origin_url}?id=ON`
+      });
+    // Sanity-check: The frame is not visible.
+    assert_greater_than(
+        frame_on.getBoundingClientRect().top,
+        window.innerHeight * 2,
+        "Unexpected position for <iframe> with ID 'ON'.");
+    let msg_or_timeout_attr_on =
+        await waitForMessageOrTimeout(t, "ON", load_timeout);
+    assert_equals(msg_or_timeout_attr_on,
+                  expected_timeout_msg,
+                  "With lazyload='on', the frame should not load.");
+  }, "Sanity-check: Contents do not load immediately (no eager-loading) " +
+     "when the lazyload attribute is 'on' and frame is in viewport.");
+
+  // When feature is enabled, a frame can turn off lazy loading by setting the
+  // attribute to 'off'.
+  promise_test(async(t) => {
+    // Add a frame with lazyload="off".
+    let frame_off = createIframe(document.body, {
+        id: "OFF",
+        lazyload: "off",
+        src: `${cross_origin_url}?id=OFF`
+      });
+    // Sanity-check: The frame is not visible.
+    assert_greater_than(
+        frame_off.getBoundingClientRect().top,
+        window.innerHeight * 2,
+        "Unexpected position for <iframe> with ID 'OFF'.");
+    let msg_or_timeout_attr_off =
+        await waitForMessageOrTimeout(t, "OFF", load_timeout);
+
+    assert_equals(msg_or_timeout_attr_off,
+                  expected_load_msg,
+                  "With lazyload='off', the frame should load.");
+  }, "When 'lazyload' feature is enabled, a frame can avoid lazyloading by " +
+     "setting 'lazyload' attribute to 'off'");
+</script>
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html.headers b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html.headers
new file mode 100644
index 00000000000..83b744e2bc4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/lazyload/lazyload-enabled-tentative.sub.html.headers
@@ -0,0 +1 @@
+Feature-Policy: lazyload *
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/common.js b/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/common.js
index 08d3aef9874..10c28be7741 100644
--- a/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/common.js
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/common.js
@@ -32,3 +32,29 @@ function onMessage(e) {
 }
 
 window.addEventListener("message", onMessage);
+
+// Waits for |load_timeout| before resolving the promise. It will resolve the
+// promise sooner if a message event with |e.data.id| of |id| is received.
+// In such a case the response is the contents of the message |e.data.contents|.
+// Otherwise, returns false (when timeout occurs).
+function waitForMessageOrTimeout(t, id, load_timeout) {
+  return new Promise((resolve) => {
+      window.addEventListener(
+        "message",
+        (e) => {
+          if (!e.data || e.data.id !== id)
+            return;
+          resolve(e.data.contents);
+        }
+      );
+      t.step_timeout(() => { resolve(false); }, load_timeout);
+  });
+}
+
+function createIframe(container, attributes) {
+  var new_iframe = document.createElement("iframe");
+  for (attr_name in attributes)
+    new_iframe.setAttribute(attr_name, attributes[attr_name]);
+  container.appendChild(new_iframe);
+  return new_iframe;
+}
diff --git a/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/lazyload-contents.html b/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/lazyload-contents.html
new file mode 100644
index 00000000000..a6e98c24e6a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/feature-policy/experimental-features/resources/lazyload-contents.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<body>
+  <p>This page is lazyloaded.</p>
+  <script>
+    let query_index = window.location.href.indexOf("?id=");
+    let id = window.location.href.substr(query_index + 4);
+    window.addEventListener("load", () => {
+      let p = document.querySelector("p");
+      let contents = p ? p.innerHTML : "null";
+      window.parent.postMessage({"id": id, "contents": contents}, "*");
+    });
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/resources/message-opener.html b/tests/wpt/web-platform-tests/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/resources/message-opener.html
index e6c164bfae5..12836f536f0 100644
--- a/tests/wpt/web-platform-tests/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/resources/message-opener.html
+++ b/tests/wpt/web-platform-tests/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/resources/message-opener.html
@@ -1,12 +1,22 @@
 <script src="/common/PrefixedPostMessage.js"></script>
 <script>
 var prefixedMessage = new PrefixedMessageResource();
-window.addEventListener('load', () => {
+var max = 50, attempts = 0;
+function sendCoordinates() {
+  // Certain windowing systems position windows asynchronously.
+  // As a result, the window may not be positioned yet when the
+  // load event fires. To accommodate this, allow waiting up to
+  // 5 seconds for positioning to take place.
+  if (!window.screenX && !window.screenY && ++attempts < max) {
+    setTimeout(sendCoordinates, 100);
+    return;
+  }
   prefixedMessage.postToOpener({
     left: window.screenX,
     top: window.screenY,
     width: window.innerWidth,
     height: window.innerHeight
   });
-});
+}
+window.addEventListener('load', sendCoordinates);
 </script>
diff --git a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html
new file mode 100644
index 00000000000..563a2aa68d8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-negative-margin.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<title>fieldset border gap with negative margin</title>
+<link rel=match href=no-red-ref.html>
+<style>
+fieldset { border:none; border-left: 100px solid red; margin: 0; padding: 0; height:100px; }
+legend { padding: 0; margin-left: -100px; width: 100px; height: 100px; transform: rotate(45deg); }
+</style>
+<p>There should be no red.</p>
+<fieldset>
+ <legend></legend>
+</fieldset>
diff --git a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-ref.html b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative-ref.html
similarity index 100%
rename from tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-ref.html
rename to tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative-ref.html
diff --git a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap.html b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html
similarity index 81%
rename from tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap.html
rename to tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html
index 4d2269632c0..1dbef479a9f 100644
--- a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap.html
+++ b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/fieldset-border-gap-position-relative.html
@@ -1,6 +1,6 @@
 <!doctype html>
 <title>fieldset border gap</title>
-<link rel=match href=fieldset-border-gap-ref.html>
+<link rel=match href=fieldset-border-gap-position-relative-ref.html>
 <style>
 fieldset, legend { margin: 0; padding: 0; }
 fieldset { border: none; border-top: 100px solid red; width: 100px; }
diff --git a/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/no-red-ref.html b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/no-red-ref.html
new file mode 100644
index 00000000000..32b7d46d6ff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/no-red-ref.html
@@ -0,0 +1,3 @@
+<!doctype html>
+<title>Reference there should be no red</title>
+<p>There should be no red.</p>
diff --git a/tests/wpt/web-platform-tests/interfaces/background-fetch.idl b/tests/wpt/web-platform-tests/interfaces/background-fetch.idl
index 130d5d825a5..0dbe3fbad3c 100644
--- a/tests/wpt/web-platform-tests/interfaces/background-fetch.idl
+++ b/tests/wpt/web-platform-tests/interfaces/background-fetch.idl
@@ -22,8 +22,8 @@ interface BackgroundFetchManager {
 };
 
 dictionary BackgroundFetchUIOptions {
-  sequence<ImageResource> icons = [];
-  DOMString title = "";
+  sequence<ImageResource> icons;
+  DOMString title;
 };
 
 dictionary BackgroundFetchOptions : BackgroundFetchUIOptions {
diff --git a/tests/wpt/web-platform-tests/interfaces/cookie-store.idl b/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
index d872b7aadb2..f5c44b60bd0 100644
--- a/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
+++ b/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
@@ -25,6 +25,7 @@ interface CookieStore : EventTarget {
   [Exposed=ServiceWorker]
   Promise<sequence<CookieStoreGetOptions>> getChangeSubscriptions();
 
+  [Exposed=Window]
   attribute EventHandler onchange;
 };
 
@@ -76,7 +77,7 @@ dictionary CookieListItem {
 
 typedef sequence<CookieListItem> CookieList;
 
-[Exposed=(ServiceWorker,Window),
+[Exposed=Window,
  SecureContext,
  Constructor(DOMString type, optional CookieChangeEventInit eventInitDict)]
 interface CookieChangeEvent : Event {
@@ -89,6 +90,18 @@ dictionary CookieChangeEventInit : EventInit {
   CookieList deleted;
 };
 
+[Exposed=ServiceWorker,
+ Constructor(DOMString type, optional ExtendableCookieChangeEventInit eventInitDict)
+] interface ExtendableCookieChangeEvent : ExtendableEvent {
+  readonly attribute CookieList changed;
+  readonly attribute CookieList deleted;
+};
+
+dictionary ExtendableCookieChangeEventInit : ExtendableEventInit {
+  CookieList changed;
+  CookieList deleted;
+};
+
 [SecureContext]
 partial interface Window {
   [Replaceable, SameObject] readonly attribute CookieStore cookieStore;
diff --git a/tests/wpt/web-platform-tests/interfaces/feature-policy.idl b/tests/wpt/web-platform-tests/interfaces/feature-policy.idl
index de2f0464683..c09cc33ce14 100644
--- a/tests/wpt/web-platform-tests/interfaces/feature-policy.idl
+++ b/tests/wpt/web-platform-tests/interfaces/feature-policy.idl
@@ -19,7 +19,6 @@ partial interface HTMLIFrameElement {
 };
 interface FeaturePolicyViolationReportBody : ReportBody {
   readonly attribute DOMString featureId;
-  readonly attribute DOMString message;
   readonly attribute DOMString? sourceFile;
   readonly attribute long? lineNumber;
   readonly attribute long? columnNumber;
diff --git a/tests/wpt/web-platform-tests/interfaces/payment-request.idl b/tests/wpt/web-platform-tests/interfaces/payment-request.idl
index 05790c7d76d..e3afbd47db3 100644
--- a/tests/wpt/web-platform-tests/interfaces/payment-request.idl
+++ b/tests/wpt/web-platform-tests/interfaces/payment-request.idl
@@ -182,11 +182,13 @@ dictionary PayerErrorFields {
 [Constructor(DOMString type, optional MerchantValidationEventInit eventInitDict),
 SecureContext, Exposed=Window]
 interface MerchantValidationEvent : Event {
+  readonly attribute DOMString methodName;
   readonly attribute USVString validationURL;
   void complete(Promise<any> merchantSessionPromise);
 };
 
 dictionary MerchantValidationEventInit : EventInit {
+  DOMString methodName = "";
   USVString validationURL = "";
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/service-workers.idl b/tests/wpt/web-platform-tests/interfaces/service-workers.idl
index 2c9cbf6955e..ed02af11717 100644
--- a/tests/wpt/web-platform-tests/interfaces/service-workers.idl
+++ b/tests/wpt/web-platform-tests/interfaces/service-workers.idl
@@ -188,14 +188,17 @@ dictionary CacheQueryOptions {
   boolean ignoreSearch = false;
   boolean ignoreMethod = false;
   boolean ignoreVary = false;
-  DOMString cacheName;
 };
 
 [SecureContext, Exposed=(Window,Worker)]
 interface CacheStorage {
-  [NewObject] Promise<any> match(RequestInfo request, optional CacheQueryOptions options);
+  [NewObject] Promise<any> match(RequestInfo request, optional MultiCacheQueryOptions options);
   [NewObject] Promise<boolean> has(DOMString cacheName);
   [NewObject] Promise<Cache> open(DOMString cacheName);
   [NewObject] Promise<boolean> delete(DOMString cacheName);
   [NewObject] Promise<sequence<DOMString>> keys();
 };
+
+dictionary MultiCacheQueryOptions : CacheQueryOptions {
+  DOMString cacheName;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
index ee5cce403f8..4df720a0fc1 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
@@ -237,7 +237,7 @@ dictionary RTCTransportStats : RTCStats {
 dictionary RTCIceCandidateStats : RTCStats {
              DOMString transportId;
              RTCNetworkType networkType;
-             DOMString ip;
+             DOMString address;
              long port;
              DOMString protocol;
              RTCIceCandidateType candidateType;
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc.idl b/tests/wpt/web-platform-tests/interfaces/webrtc.idl
index c06e91e6de7..c4ca910d6d1 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc.idl
@@ -168,7 +168,7 @@ interface RTCIceCandidate {
     readonly        attribute DOMString? foundation;
     readonly        attribute RTCIceComponent? component;
     readonly        attribute unsigned long? priority;
-    readonly        attribute DOMString? ip;
+    readonly        attribute DOMString? address;
     readonly        attribute RTCIceProtocol? protocol;
     readonly        attribute unsigned short? port;
     readonly        attribute RTCIceCandidateType? type;
diff --git a/tests/wpt/web-platform-tests/lint.whitelist b/tests/wpt/web-platform-tests/lint.whitelist
index 837a9d01a75..e39672d0c6e 100644
--- a/tests/wpt/web-platform-tests/lint.whitelist
+++ b/tests/wpt/web-platform-tests/lint.whitelist
@@ -208,6 +208,8 @@ SET TIMEOUT: streams/piping/general.js
 SET TIMEOUT: streams/readable-streams/cancel.js
 SET TIMEOUT: streams/resources/rs-utils.js
 SET TIMEOUT: streams/writable-streams/byte-length-queuing-strategy.js
+SET TIMEOUT: trusted-types/block-string-assignment-to-DOMWindowTimers-setTimeout-setInterval.tentative.html
+SET TIMEOUT: trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html
 SET TIMEOUT: user-timing/*
 SET TIMEOUT: webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html
 SET TIMEOUT: webauthn/*timeout.https.html
diff --git a/tests/wpt/web-platform-tests/mimesniff/mime-types/resources/mime-types.json b/tests/wpt/web-platform-tests/mimesniff/mime-types/resources/mime-types.json
index 1d0b1528892..8918b355bf5 100644
--- a/tests/wpt/web-platform-tests/mimesniff/mime-types/resources/mime-types.json
+++ b/tests/wpt/web-platform-tests/mimesniff/mime-types/resources/mime-types.json
@@ -194,9 +194,9 @@
   },
   {
     "input": "text/html;charset=\"\";charset=GBK",
-    "output": "text/html;charset=GBK",
+    "output": "text/html;charset=\"\"",
     "navigable": true,
-    "encoding": "GBK"
+    "encoding": null
   },
   {
     "input": "text/html;charset=\";charset=GBK",
diff --git a/tests/wpt/web-platform-tests/payment-request/MerchantValidationEvent/constructor.https.html b/tests/wpt/web-platform-tests/payment-request/MerchantValidationEvent/constructor.https.html
index 952c0f734a3..ec8a4ff1ed0 100644
--- a/tests/wpt/web-platform-tests/payment-request/MerchantValidationEvent/constructor.https.html
+++ b/tests/wpt/web-platform-tests/payment-request/MerchantValidationEvent/constructor.https.html
@@ -6,7 +6,9 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script>
-const applePay = Object.freeze({ supportedMethods: "https://apple.com/apple-pay"});
+const applePay = Object.freeze({
+  supportedMethods: "https://apple.com/apple-pay",
+});
 const basicCard = Object.freeze({ supportedMethods: "basic-card" });
 const defaultMethods = Object.freeze([basicCard, applePay]);
 const defaultDetails = Object.freeze({
@@ -56,21 +58,69 @@ test(() => {
 test(() => {
   const validationURL = "http://\u005B"; // invalid URL
   assert_throws(new TypeError(), () => {
-    new MerchantValidationEvent("test", { validationURL })
+    new MerchantValidationEvent("test", { validationURL });
   });
 }, "Must throw TypeError if initialized with an invalid URL.");
 
 test(() => {
   const validationURL = "";
-  const relativePaths = [
-    "",
-    ".",
-    "/test",
-  ]
-  for(const path of relativePaths ) {
+  const relativePaths = ["", ".", "/test"];
+  for (const path of relativePaths) {
     const event = new MerchantValidationEvent("test", { validationURL: path });
     const expected = new URL(path, document.location.href).href;
     assert_equals(event.validationURL, expected);
   }
 }, "Relative validationURLs use the document as the base.");
+
+test(() => {
+  const methodName = "https://pass.com";
+  const event = new MerchantValidationEvent("test", { methodName });
+  assert_idl_attribute(event, "methodName");
+  assert_equals(event.methodName, "https://pass.com");
+}, "Must have a methodName IDL attribute, which is initialized with to the methodName dictionary value.");
+
+test(() => {
+  const event = new MerchantValidationEvent("test", {});
+  assert_equals(event.methodName, "");
+}, "When no methodName is passed, methodName attribute defaults to the empty string");
+
+test(() => {
+  const validPMIs = [
+    "https://example.com/pay",
+    "https://example.com/pay?version=1",
+    "https://example.com/pay/version/1",
+    "basic-card",
+    "https://apple.com/apple-pay",
+    // special case for as default value
+    "",
+  ];
+  for (const methodName of validPMIs) {
+    const event = new MerchantValidationEvent("test", { methodName });
+    assert_equals(event.methodName, methodName);
+  }
+}, "MerchantValidationEvent can be constructed with valid PMIs");
+
+test(() => {
+  const invalidPMIs = [
+    // ❌ Contains Unicode character outside the valid ranges.
+    "basic-💳",
+    // ❌ Contains uppercase characters.
+    "Basic-Card",
+    // ❌ Contains Unicode characters outside the valid ranges.
+    "¡basic-*-card!",
+    // ❌ Uses http://, a username, and a password.
+    "http://username:password@example.com/pay",
+    // ❌ Uses unknown URI scheme.
+    "unknown://example.com/pay",
+  ];
+  for (const methodName of invalidPMIs) {
+    assert_throws(
+      new RangeError(),
+      () => {
+        const event = new MerchantValidationEvent("test", { methodName });
+      },
+      `expected to throw when constructed with invalid PMI: '${methodName}'`
+    );
+  }
+}, "MerchantValidationEvent can't be constructed with invalid PMIs");
 </script>
diff --git a/tests/wpt/web-platform-tests/pointerevents/extension/pointerevent_pointerrawmove_in_pointerlock-manual.html b/tests/wpt/web-platform-tests/pointerevents/extension/pointerevent_pointerrawmove_in_pointerlock-manual.html
new file mode 100644
index 00000000000..30fff15bd92
--- /dev/null
+++ b/tests/wpt/web-platform-tests/pointerevents/extension/pointerevent_pointerrawmove_in_pointerlock-manual.html
@@ -0,0 +1,83 @@
+<!doctype html>
+<html>
+    <head>
+        <title>pointerrawmove</title>
+        <meta name="viewport" content="width=device-width">
+        <link rel="stylesheet" type="text/css" href="../pointerevent_styles.css">
+        <script src="/resources/testharness.js"></script>
+        <script src="/resources/testharnessreport.js"></script>
+        <!-- Additional helper script for common checks across event types -->
+        <script type="text/javascript" src="../pointerevent_support.js"></script>
+    </head>
+    <body onload="run()">
+        <h2>pointerrawmove</h2>
+        <h4>Test Description: This test checks if pointerrawmove is dispatched correctly while in pointerlock mode. </h4>
+        <p>Click in the box (and accept the pointerlock permission if asked).</p>
+        <p>Move your mouse.</p>
+        <div id="target0"></div>
+        <iframe id="innerframe" src="../resources/pointerevent_pointerrawmove_in_pointerlock-iframe.html"></iframe>
+        <script>
+            window.name="outerframe";
+            var test_pointerrawmove = async_test("pointerrawmove event received");
+
+            var outerframe_pointerrawmoveReceived = false;
+            var innerframe_pointerrawmoveReceived = false;
+
+            function run() {
+                var target0 = document.getElementById("target0");
+                var innerframe = document.getElementById('innerframe');
+                var target1 = innerframe.contentDocument.getElementById('target1');
+                innerframe.contentWindow.name = "innerframe";
+
+                on_event(document, "pointerlockchange", function(event) {
+                  if (document.pointerLockElement == target0) {
+                    on_event(target0, "pointerrawmove", function (event) {
+                      outerframe_pointerrawmoveReceived = true;
+                      test_pointerrawmove.step(function() {
+                        assert_equals(event.view.name, "outerframe", "View attribute of pointerrawmove should be the target frame.");
+                      }, "View attribute of pointerrawmove should be the target frame.");
+                    });
+                    on_event(target0, "pointermove", function (event) {
+                      test_pointerrawmove.step(function() {
+                        assert_true(outerframe_pointerrawmoveReceived,
+                                    "Pointerrawmove event should have been received before pointermove while in pointerlock mode.");
+                        assert_equals(event.view.name, "outerframe", "View attribute of pointerrawmove should be the target frame.");
+                      }, "Pointerrawmove event should have been received before pointermove while in pointerlock mode.");
+                      document.exitPointerLock();
+
+                      on_event(target1, "click", function(event) {
+                        target1.requestPointerLock();
+                      });
+
+                      on_event(innerframe.contentDocument, "pointerlockchange", function(event) {
+                        if (innerframe.contentDocument.pointerLockElement == target1) {
+                          on_event(target1, "pointerrawmove", function (event) {
+                            innerframe_pointerrawmoveReceived = true;
+                            test_pointerrawmove.step(function() {
+                              assert_equals(event.view.name, "innerframe", "View attribute of pointerrawmove should be the target frame.");
+                            }, "View attribute of pointerrawmove should be the target frame.");
+                          });
+                          on_event(target1, "pointermove", function (event) {
+                            test_pointerrawmove.step(function() {
+                              assert_true(innerframe_pointerrawmoveReceived,
+                                    "Pointerrawmove event should have been received before pointermove while in pointerlock mode.");
+                            }, "Pointerrawmove event should have been received before pointermove while in pointerlock mode.");
+                            innerframe.contentDocument.exitPointerLock();
+                            test_pointerrawmove.done();
+                          });
+                        }
+                      });
+
+                    });
+                  }
+                });
+                on_event(target0, "click", function(event) {
+                  target0.requestPointerLock();
+                });
+            }
+
+        </script>
+        <div id="complete-notice">
+        </div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse-manual.html
index c4c7bc8c7c4..ee31e225722 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_mouse-manual.html
@@ -36,9 +36,14 @@
             var pointermoveNoCaptureGot1 = false;
             var ownEventForTheCapturedTargetGot = false;
             var count=0;
+            var event_log = [];
 
             var detected_pointertypes = {};
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var target1 = document.getElementById('target1');
@@ -57,13 +62,13 @@
 
                 on_event(target0, 'gotpointercapture', function(e) {
                     test_gotpointercapture.done();
-                    log("gotpointercapture", target0);
+                    event_log.push('gotpointercapture@target0');
                 });
 
                 on_event(target0, 'lostpointercapture', function(e) {
                     test_lostpointercapture.done();
                     isPointerCapture = false;
-                    log("lostpointercapture", target0);
+                    event_log.push('lostpointercapture@target0');
                 });
 
                 run();
@@ -77,7 +82,7 @@
                     detected_pointertypes[ event.pointerType ] = true;
                     if(!pointermoveNoCaptureGot0) {
                         test_pointermove0.done();
-                        log("pointermove", document.getElementById('target0'));
+                        event_log.push('pointermove@target0');
                         pointermoveNoCaptureGot0 = true;
                     }
                     if(isPointerCapture) {
@@ -92,7 +97,7 @@
                                 (event.clientY > target0.getBoundingClientRect().bottom),
                                 "pointermove received for captured element while out of it")
                             }, "pointermove received for captured element while out of it");
-                            log("pointermove", document.getElementById('target0'));
+                            event_log.push('pointermove@target0');
                             pointermoveCaptureGot0 = true;
                         }
                         if((event.clientX > target0.getBoundingClientRect().left)&&
@@ -103,7 +108,7 @@
                                 test(function() {
                                     assert_true(true, "pointermove received for captured element while inside of it");
                                 }, "pointermove received for captured element while inside of it");
-                            log("pointermove", document.getElementById('target0'));
+                            event_log.push('pointermove@target0');
                             ownEventForTheCapturedTargetGot = true;
                         }
                     }
@@ -117,7 +122,7 @@
                         }
                     if(!pointermoveNoCaptureGot1) {
                         test_pointermove1.done();
-                        log("pointermove", document.getElementById('target1'));
+                        event_log.push('pointermove@target1');
                         pointermoveNoCaptureGot1 = true;
                     }
                 });
@@ -126,7 +131,8 @@
         <h1>Pointer Events Capture Test</h1>
         <div id="complete-notice">
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_suppressing_mouse-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_suppressing_mouse-manual.html
index 763e17916e9..127b07a9ee0 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_suppressing_mouse-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_capture_suppressing_mouse-manual.html
@@ -36,9 +36,14 @@
             var isTargetAuthenticityTested = false;
             var lostPointerCaptureReceived = false;
             var count = 0;
+            var event_log = [];
 
             var detected_pointertypes = {};
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var target1 = document.getElementById('target1');
@@ -69,14 +74,14 @@
 
                 on_event(target0, 'gotpointercapture', function(e) {
                     test_gotpointercapture.done();
-                    log("gotpointercapture", target0);
+                    event_log.push('gotpointercapture@target0');
                 });
 
                 on_event(target0, 'lostpointercapture', function(e) {
                     isPointerCapture = false;
                     lostPointerCaptureReceived = true;
                     test_lostpointercapture.done();
-                    log("lostpointercapture", target0);
+                    event_log.push('lostpointercapture@target0');
                 });
 
                 run();
@@ -85,7 +90,7 @@
             function run() {
                 on_event(target0, "pointerover", function (event) {
                     detected_pointertypes[ event.pointerType ] = true;
-                    log("pointerover", target0);
+                    event_log.push('pointerover@target0');
                     if(isPointerCapture) {
                         test_pointerover_capture.done();
                         if (!isRelatedTargetValueTested) {
@@ -108,7 +113,7 @@
                 });
 
                 on_event(target0, "pointerout", function (event) {
-                    log("pointerout", target0);
+                    event_log.push('pointerout@target0');
                     if(isPointerCapture) {
                         test(function() {
                             assert_unreached("pointerout shouldn't be sent to captured node as all the events are targeted at the capturing node");
@@ -124,7 +129,7 @@
                 });
 
                 on_event(target0, "pointerenter", function (event) {
-                    log("pointerenter", target0);
+                    event_log.push('pointerenter@target0');
                     if(isPointerCapture) {
                         test_pointerenter_capture.done();
                     }
@@ -134,7 +139,7 @@
                 });
 
                 on_event(target0, "pointerleave", function (event) {
-                    log("pointerleave", target0);
+                    event_log.push('pointerleave@target0');
                     if(isPointerCapture) {
                         test(function() {
                             assert_unreached("pointerleave shouldn't be sent to captured node as all the events are targeted at the capturing node");
@@ -151,7 +156,7 @@
 
                 // fail if capture is set but event is received for the non-captured target
                 on_event(target1, "pointerover", function (event) {
-                    log("pointerover", target1);
+                    event_log.push('pointerover@target1');
                     if(isPointerCapture == true) {
                         test(function() {
                             assert_unreached("pointerover shouldn't trigger for this target when capture is enabled");
@@ -160,7 +165,7 @@
                 });
 
                 on_event(target1, "pointerout", function (event) {
-                    log("pointerout", target1);
+                    event_log.push('pointerout@target1');
                     if(isPointerCapture == true) {
                         test(function() {
                             assert_unreached("pointerout shouldn't trigger for this target when capture is enabled");
@@ -169,7 +174,7 @@
                 });
 
                 on_event(target1, "pointerenter", function (event) {
-                    log("pointerenter", target1);
+                    event_log.push('pointerenter@target1');
                     if(isPointerCapture == true) {
                         test(function() {
                             assert_unreached("pointerenter shouldn't trigger for this target when capture is enabled");
@@ -178,7 +183,7 @@
                 });
 
                 on_event(target1, "pointerleave", function (event) {
-                    log("pointerleave", target1);
+                    event_log.push('pointerleave@target1');
                     if(isPointerCapture == true) {
                         test(function() {
                             assert_unreached("pointerleave shouldn't trigger for this target when capture is enabled");
@@ -190,6 +195,7 @@
         <h1>Pointer Events Capture Test</h1>
         <div id="complete-notice">
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_for_disconnected_node-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_for_disconnected_node-manual.html
index ca305f74f78..f4fe2b424e6 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_for_disconnected_node-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_for_disconnected_node-manual.html
@@ -26,9 +26,14 @@
         <script type='text/javascript'>
             var isDisconnected = false;
             var count = 0;
+            var event_log = [];
 
             var detected_pointertypes = {};
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var target1 = document.getElementById('target1');
@@ -43,13 +48,13 @@
                 });
 
                 on_event(target0, 'gotpointercapture', function(e) {
-                    log("gotpointercapture", target1);
+                    event_log.push('gotpointercapture@target1');
                     isDisconnected = true;
                     target0.parentNode.removeChild(target0);
                 });
 
                 on_event(target0, 'lostpointercapture', function(e) {
-                    log("lostpointercapture on element", target1);
+                    event_log.push('lostpointercapture@target0');
                     test(function() {
                         // TA: 11.3
                         assert_unreached("lostpointercapture must be fired on the document, not the capturing element");
@@ -57,7 +62,7 @@
                 });
 
                 on_event(document, 'lostpointercapture', function(e) {
-                    log("lostpointercapture on document", target1);
+                    event_log.push('lostpointercapture@document');
                     test(function() {
                         // TA: 11.3
                         assert_true(isDisconnected, "lostpointercapture must be fired on the document");
@@ -69,6 +74,7 @@
         <h1>Pointer Events Capture Test</h1>
         <div id="complete-notice">
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_is_first-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_is_first-manual.html
index e446d184429..9e460b872e2 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_is_first-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_lostpointercapture_is_first-manual.html
@@ -40,8 +40,13 @@
             var testStarted = false;
             var eventRcvd = false;
             var isAsync = false;
+            var event_log = [];
 
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var captureButton = document.getElementById('btnCapture');
@@ -72,11 +77,11 @@
                             testStarted = true;
                             rPointerCapture(event);
                             isAsync = true;
-                            log("gotpointercapture", target0);
+                            event_log.push('gotpointercapture@target0');
                             return;
                         }
                         else if (event.type == "lostpointercapture") {
-                            log("lostpointercapture", target0);
+                            event_log.push('lostpointercapture@target0');
                             captureButton.value = 'Set Capture';
                             isPointerCapture = false;
 
@@ -123,6 +128,7 @@
         <h1>Pointer Events Capture Test</h1>
         <div id="complete-notice">
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointercancel_touch-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointercancel_touch-manual.html
index 105e3b5a974..497840041f6 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointercancel_touch-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointercancel_touch-manual.html
@@ -23,12 +23,17 @@
         <script type='text/javascript'>
             var pointercancelGot = false;
             var count=0;
+            var event_log = [];
             var detected_pointertypes = {};
             var test_pointerEvent = async_test("pointer capture is released on pointercancel");
 
             var target0 = document.getElementById('target0');
 
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             window.onload = function() {
                 on_event(target0, 'pointerdown', function(e) {
@@ -42,13 +47,13 @@
                 });
 
                 on_event(target0, 'gotpointercapture', function(e) {
-                    log("gotpointercapture", document.getElementById('target0'));
+                    event_log.push('gotpointercapture@target0');
                 });
 
                 // If the setPointerCapture method has been invoked on the pointer specified by pointerId, and the releasePointerCapture method has not been invoked, a lostpointercapture event must be dispatched to the element on which the setPointerCapture method was invoked. Furthermore, subsequent events for the specified pointer must follow normal hit testing mechanisms for determining the event target.
                 // TA: 4.4
                 on_event(target0, 'lostpointercapture', function(e) {
-                    log("lostpointercapture", document.getElementById('target0'));
+                    event_log.push('lostpointercapture@target0');
                     test_pointerEvent.step(function () {
                         assert_true(pointercancelGot, "pointercancel was received before lostpointercapture");
                     });
@@ -56,7 +61,7 @@
                 });
 
                 on_event(target0, 'pointercancel', function(e) {
-                    log("pointercancel", target0);
+                    event_log.push('pointercancel@target0');
                     pointercancelGot = true;
                 });
             }
@@ -65,6 +70,7 @@
         <div id="complete-notice">
             <p>Test complete: Scroll to Summary to view Pass/Fail Results.</p>
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointerup_mouse-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointerup_mouse-manual.html
index df515436c05..24fe40d5834 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointerup_mouse-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_releasepointercapture_onpointerup_mouse-manual.html
@@ -25,9 +25,14 @@
             var isPointerCapture = false;
             var pointerupGot = false;
             var count=0;
+            var event_log = [];
 
             var detected_pointertypes = {};
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var captureButton = document.getElementById('btnCapture');
@@ -45,7 +50,7 @@
                 });
 
                 on_event(target0, 'gotpointercapture', function(e) {
-                    log("gotpointercapture", document.getElementById('target0'));
+                    event_log.push('gotpointercapture@target0');
                 });
 
                 // If the setPointerCapture method has been invoked on the pointer specified by pointerId,
@@ -58,13 +63,13 @@
                     test(function() {
                         assert_true(pointerupGot, "pointerup was received before lostpointercapture")
                     }, "pointerup was received before lostpointercapture");
-                    log("lostpointercapture", document.getElementById('target0'));
+                    event_log.push('lostpointercapture@target0');
                     isPointerCapture = false;
                     done();
                 });
 
                 on_event(target0, 'pointerup', function(e) {
-                    log("pointerup", target0);
+                    event_log.push('pointerup@target0');
                     pointerupGot = true;
                 });
             }
@@ -73,7 +78,8 @@
         <div id="complete-notice">
             <p>Test complete: Scroll to Summary to view Pass/Fail Results.</p>
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
         </div>
         <div id="log"></div>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_setpointercapture_relatedtarget-manual.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_setpointercapture_relatedtarget-manual.html
index bc319512727..bc1bb93c716 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_setpointercapture_relatedtarget-manual.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_setpointercapture_relatedtarget-manual.html
@@ -30,9 +30,14 @@
             var isPointerCapture = false;
             var isPointeroverGot = false;
             var count=0;
+            var event_log = [];
 
             var detected_pointertypes = {};
-            add_completion_callback(showPointerTypes);
+            add_completion_callback(end_of_test);
+            function end_of_test() {
+                showLoggedEvents();
+                showPointerTypes();
+            }
 
             var target0 = document.getElementById('target0');
             var target1 = document.getElementById('target1');
@@ -53,11 +58,11 @@
                 });
 
                 on_event(target0, 'gotpointercapture', function(e) {
-                    log("gotpointercapture", document.getElementById('target0'));
+                    event_log.push('gotpointercapture@target0');
                 });
 
                 on_event(target0, 'lostpointercapture', function(e) {
-                    log("lostpointercapture", document.getElementById('target0'));
+                    event_log.push('lostpointercapture@target0');
                     isPointerCapture = false;
                 });
 
@@ -68,7 +73,7 @@
                 // After invoking the setPointerCapture method on an element, subsequent pointer events for the specified pointer must be targeted at that element
                 // and boundary events should be sent accordingly and relatedTarget should behave normally.
                 on_event(target0, "pointerover", function (event) {
-                    log("pointerover", document.getElementById('target0'));
+                    event_log.push('pointerover@target0');
                     if(isPointerCapture && isPointeroverGot) {
                         test(function() {
                             assert_not_equals(event.relatedTarget, null, "relatedTarget should not be null even when the capture is set")
@@ -84,7 +89,7 @@
                             assert_true(isPointerCapture==false, "pointerover shouldn't trigger for this target when capture is enabled");
                         }, "pointerover shouldn't trigger for the purple rectangle while the black rectangle has capture");
                         isPointeroverGot = true;
-                        log("pointerover", document.getElementById('target1'));
+                        event_log.push('pointerover@target1');
                     }
                 });
             }
@@ -93,6 +98,7 @@
         <div id="complete-notice">
             <p>Test complete: Scroll to Summary to view Pass/Fail Results.</p>
             <p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
+            <p>The following events were logged: <span id="event-log"></span>.</p>
             <p>Refresh the page to run the tests again with a different pointer type.</p>
         </div>
         <div id="log"></div>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
index bf68f85fe08..5c35e016a0e 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
@@ -136,15 +136,7 @@ function showLoggedEvents() {
     complete_notice.style.display = "block";
 }
 
-function log(msg, el) {
-    if (++count > 10){
-      count = 0;
-      el.innerHTML = ' ';
-    }
-    el.innerHTML = msg + '; ' + el.innerHTML;
-}
-
- function failOnScroll() {
+function failOnScroll() {
     assert_true(false,
     "scroll received while shouldn't");
 }
diff --git a/tests/wpt/web-platform-tests/pointerevents/resources/pointerevent_pointerrawmove_in_pointerlock-iframe.html b/tests/wpt/web-platform-tests/pointerevents/resources/pointerevent_pointerrawmove_in_pointerlock-iframe.html
new file mode 100644
index 00000000000..505fc2cae40
--- /dev/null
+++ b/tests/wpt/web-platform-tests/pointerevents/resources/pointerevent_pointerrawmove_in_pointerlock-iframe.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+    <head>
+        <meta name="viewport" content="width=device-width">
+        <link rel="stylesheet" type="text/css" href="../pointerevent_styles.css">
+    </head>
+    <body>
+        <div id="target1"></div>
+    </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToMultiplePresentations_success-manual.https.html b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToMultiplePresentations_success-manual.https.html
new file mode 100644
index 00000000000..211e8a01058
--- /dev/null
+++ b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToMultiplePresentations_success-manual.https.html
@@ -0,0 +1,120 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Reconnecting presentations on two distinct displays</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="http://w3c.github.io/presentation-api/#dom-presentationrequest-reconnect">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="common.js"></script>
+<style>
+#second-step {
+  display: none;
+}
+</style>
+
+<p id="first-step">Click the button below and select the available presentation display, to start the manual test.</p>
+<p id="second-step">Click the button below and select the other available presentation display, to continue the manual test.</p>
+<p>This test asks you to click the button twice, unless the test fails.<br>
+<em>This test requires two or more available displays.<em></p>
+<button id="presentBtn">Start Presentation Test</button>
+
+
+<script>
+  promise_test(async t => {
+    const presentBtn = document.getElementById("presentBtn");
+
+    const request1 = new PresentationRequest(presentationUrls);
+    const request2 = new PresentationRequest(presentationUrls);
+    const clickWatcher = new EventWatcher(t, presentBtn, 'click');
+    let connection1, connection2, eventWatcher1, eventWatcher2, timer;
+
+    t.add_cleanup(() => {
+      [
+        { connection: connection1, request: request1 },
+        { connection: connection2, request: request2 }
+      ].forEach(p => {
+        if (p.connection) {
+          p.connection.onconnect = () => { p.connection.terminate(); };
+          if (p.connection.state == 'closed')
+            p.request.reconnect(p.connection.id);
+          else
+            p.connection.terminate();
+        }
+      });
+    });
+
+    const disableTimeout = () => {
+      setup({explicit_timeout: true});
+      if (timer) {
+        clearTimeout(timer);
+        timer = null;
+      }
+    };
+
+    const enableTimeout = () => {
+      timer = t.step_timeout(() => {
+        t.force_timeout();
+        t.done();
+      }, 5000);
+    }
+
+    disableTimeout();
+
+    await clickWatcher.wait_for('click');
+    presentBtn.disabled = true;
+    connection1 = await request1.start();
+
+    presentBtn.disabled = false;
+    document.getElementById('first-step').style.display = 'none';
+    document.getElementById('second-step').style.display = 'block';
+    presentBtn.innerText = 'Continue Presentation Test';
+    eventWatcher1 = new EventWatcher(t, connection1, ['connect', 'close', 'terminate']);
+
+    await Promise.all([
+      eventWatcher1.wait_for('connect'),
+      (async () => {
+        await clickWatcher.wait_for('click');
+        presentBtn.disabled = true;
+
+        connection2 = await request2.start();
+        enableTimeout();
+        eventWatcher2 = new EventWatcher(t, connection2, ['connect', 'close', 'terminate']);
+        await eventWatcher2.wait_for('connect');
+      })()
+    ]);
+
+    connection1.close();
+    assert_equals(connection2.state, 'connected',
+      'Closing one presentation connection does not affect the state of the other.');
+
+    await eventWatcher1.wait_for('close');
+    assert_equals(connection1.state, 'closed', 'The presentation connection is successfully closed.');
+
+    connection2.close();
+    await eventWatcher2.wait_for('close');
+    assert_equals(connection2.state, 'closed', 'The presentation connection is successfully closed.');
+
+    const c1 = await request1.reconnect(connection1.id);
+    assert_equals(c1, connection1, 'The promise is resolved with the existing presentation connection.');
+
+    // Reconnecting a presentation via a different presentation request with the same presentation
+    // URLs will succeed
+    const c2 = await request1.reconnect(connection2.id);
+    assert_equals(c2, connection2, 'The promise is resolved with the existing presentation connection.');
+
+    await Promise.all([
+      eventWatcher1.wait_for('connect'),
+      eventWatcher2.wait_for('connect')
+    ]);
+
+    assert_equals(connection1.state, 'connected', 'The presentation connection is successfully reconnected.');
+    assert_equals(connection2.state, 'connected', 'The presentation connection is successfully reconnected.');
+    connection1.terminate();
+    connection2.terminate();
+
+    await Promise.all([
+      eventWatcher1.wait_for('terminate'),
+      eventWatcher2.wait_for('terminate')
+    ]);
+  });
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error-manual.https.html b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error-manual.https.html
new file mode 100644
index 00000000000..41cb360bb1d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error-manual.https.html
@@ -0,0 +1,61 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Calling "reconnect" with a wrong presentation ID fails with a NotFoundError exception</title>
+<link rel="author" title="Franck William Taffo" href="http://www.fokus.fraunhofer.de">
+<link rel="author" title="Louay Bassbouss" href="http://www.fokus.fraunhofer.de">
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="http://w3c.github.io/presentation-api/#dom-presentationrequest-reconnect">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="common.js"></script>
+
+<p>Click the button below to start the manual test. Select a presentation device after the selection dialog is prompted.
+  The test assumes that at least one presentation device is available. The test passes if a "PASS" result appears.</p>
+<button id="startBtn">Start Test</button>
+
+<script>
+  promise_test(async t => {
+    const startBtn = document.getElementById('startBtn');
+    const wrongPresentationId = "wrongPresentationId";
+    const request1 = new PresentationRequest(presentationUrls);
+    const request2 = new PresentationRequest('https://www.w3.org');
+    let connection1, eventWatcher1;
+
+    t.add_cleanup(() => {
+      if (connection1) {
+        connection1.onconnect = () => { connection1.terminate(); }
+        if (connection1.state === 'closed')
+          request1.reconnect(connection1.id);
+        else
+          connection1.terminate();
+      }
+    });
+
+    await promise_rejects(t, 'NotFoundError', request1.reconnect(wrongPresentationId),
+      'Reconnecting with an unknown presentation ID fails with a NotFoundError exception.');
+
+    setup({explicit_timeout: true});
+    const clickWatcher = new EventWatcher(t, startBtn, 'click');
+    await clickWatcher.wait_for('click');
+    connection1 = await request1.start();
+
+    t.step_timeout(() => {
+      t.force_timeout();
+      t.done();
+    }, 5000);
+
+    startBtn.disabled = true;
+    eventWatcher1 = new EventWatcher(t, connection1, ['connect', 'close', 'terminate']);
+    await eventWatcher1.wait_for('connect');
+    connection1.close();
+    await eventWatcher1.wait_for('close');
+
+    await promise_rejects(t, 'NotFoundError', request2.reconnect(connection1.id),
+      'Reconnecting with a presentation ID on a presentation request with a different URL fails with a NotFoundError exception.');
+
+    await request1.reconnect(connection1.id);
+    await eventWatcher1.wait_for('connect');
+    connection1.terminate();
+    await eventWatcher1.wait_for('terminate');
+  });
+</script>
diff --git a/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error.https.html b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error.https.html
deleted file mode 100644
index 390e42eae77..00000000000
--- a/tests/wpt/web-platform-tests/presentation-api/controlling-ua/reconnectToPresentation_notfound_error.https.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>Calling "reconnect" with an unknown presentation ID fails with a NotFoundError exception</title>
-<link rel="author" title="Franck William Taffo" href="http://www.fokus.fraunhofer.de">
-<link rel="author" title="Louay Bassbouss" href="http://www.fokus.fraunhofer.de">
-<link rel="help" href="http://w3c.github.io/presentation-api/#dom-presentationrequest-reconnect">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="common.js"></script>
-<script>
-    promise_test(function (t) {
-        var wrongPresentationId = "wrongPresentationId";
-        var request = new PresentationRequest(presentationUrls);
-        return promise_rejects(t, 'NotFoundError', request.reconnect(wrongPresentationId));
-    });
-</script>
diff --git a/tests/wpt/web-platform-tests/presentation-api/controlling-ua/startMultiplePresentations_success-manual.https.html b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/startMultiplePresentations_success-manual.https.html
new file mode 100644
index 00000000000..0268bd87e8f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/presentation-api/controlling-ua/startMultiplePresentations_success-manual.https.html
@@ -0,0 +1,99 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Starting presentations on two distinct displays</title>
+<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
+<link rel="help" href="http://w3c.github.io/presentation-api/#dfn-controlling-user-agent">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="common.js"></script>
+<style>
+#second-step {
+  display: none;
+}
+</style>
+
+<p id="first-step">Click the button below and select the available presentation display, to start the manual test.</p>
+<p id="second-step">Click the button below and select the other available presentation display, to continue the manual test.</p>
+<p>This test asks you to click the button twice, unless the test fails.<br>
+<em>This test requires two or more available displays.<em></p>
+<button id="presentBtn">Start Presentation Test</button>
+
+
+<script>
+  promise_test(async t => {
+    const presentBtn = document.getElementById("presentBtn");
+
+    const request = new PresentationRequest(presentationUrls);
+    const clickWatcher = new EventWatcher(t, presentBtn, 'click');
+    let connection1, connection2, eventWatcher1, eventWatcher2, timer;
+
+    t.add_cleanup(() => {
+      [connection1, connection2].forEach(connection => {
+        if (connection) {
+          connection.onconnect = () => { connection.terminate(); };
+          if (connection.state == 'closed')
+            request.reconnect(connection.id);
+          else
+            connection.terminate();
+        }
+      });
+    });
+
+    const disableTimeout = () => {
+      setup({explicit_timeout: true});
+      if (timer) {
+        clearTimeout(timer);
+        timer = null;
+      }
+    };
+
+    const enableTimeout = () => {
+      timer = t.step_timeout(() => {
+        t.force_timeout();
+        t.done();
+      }, 5000);
+    }
+
+    disableTimeout();
+
+    await clickWatcher.wait_for('click');
+    presentBtn.disabled = true;
+    connection1 = await request.start();
+
+    presentBtn.disabled = false;
+    document.getElementById('first-step').style.display = 'none';
+    document.getElementById('second-step').style.display = 'block';
+    presentBtn.innerText = 'Continue Presentation Test';
+    eventWatcher1 = new EventWatcher(t, connection1, ['connect', 'close', 'terminate']);
+
+    await Promise.all([
+      eventWatcher1.wait_for('connect'),
+      (async () => {
+        await clickWatcher.wait_for('click');
+        presentBtn.disabled = true;
+
+        connection2 = await request.start();
+        enableTimeout();
+        eventWatcher2 = new EventWatcher(t, connection2, ['connect', 'terminate']);
+        await eventWatcher2.wait_for('connect');
+      })()
+    ]);
+
+    assert_not_equals(connection1.id, connection2.id,
+      'Presentation connections on distinct presentations must have different presentation IDs.');
+
+    assert_equals(connection1.state, 'connected', 'The presentation connection is successfully reconnected.');
+    connection1.terminate();
+    assert_equals(connection2.state, 'connected',
+      'Terminating one presentation connection does not affect the state of the other.');
+    connection2.terminate();
+
+    await Promise.all([
+      eventWatcher1.wait_for('terminate'),
+      eventWatcher2.wait_for('terminate')
+    ]);
+
+    assert_equals(connection1.state, 'terminated', 'One presentation connection is successfully terminated.');
+    assert_equals(connection2.state, 'terminated', 'Both presentation connections are successfully terminated.');
+  });
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/redirected-response.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/redirected-response.https.html
index 05a94e2fd1d..176fcb494b6 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/redirected-response.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/redirected-response.https.html
@@ -33,6 +33,11 @@ function redirected_test(options) {
         assert_equals(
             cloned_response.redirected, options.expected_redirected,
             'The redirected flag of cloned response must match. URL: ' + options.url);
+        if (options.expected_response_url) {
+            assert_equals(
+                cloned_response.url, options.expected_response_url,
+                'The URL does not meet expectation. URL: ' + options.url);
+        }
         return cache.put(options.url, response);
       })
     .then(_ => cache.match(options.url))
@@ -348,4 +353,23 @@ promise_test(t => setup_and_clean()
         });
     }),
   'Fetch should not follow the redirect response 21 times.');
+
+// =======================================================
+// A test for verifying the url of a service-worker-redirected request is
+// propagated to the outer response.
+// =======================================================
+promise_test(t => setup_and_clean()
+    .then(() => {
+      const url = host_info['HTTPS_ORIGIN'] + base_path() + 'dummy?url=' +
+                  encodeURIComponent(TARGET_URL) +'&sw=fetch-url';
+      return redirected_test({url: url,
+                              fetch_option: {},
+                              fetch_method: frame.contentWindow.fetch,
+                              expected_type: 'basic',
+                              expected_redirected: false,
+                              expected_intercepted_urls: [url],
+                              expected_response_url: TARGET_URL});
+    }),
+  'The URL for the service worker redirected request should be propagated to ' +
+  'response.');
 </script>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/redirect-worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/redirect-worker.js
index 5258c5e7be4..bf0a3a8d9e0 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/redirect-worker.js
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/redirect-worker.js
@@ -68,6 +68,8 @@ self.addEventListener('fetch', function(event) {
         return Response.redirect(params['url']);
       } else if (params['sw'] == 'fetch') {
         return fetch(event.request);
+      } else if (params['sw'] == 'fetch-url') {
+        return fetch(params['url']);
       } else if (params['sw'] == 'follow') {
         return fetch(new Request(event.request.url, {redirect: 'follow'}));
       } else if (params['sw'] == 'manual') {
diff --git a/tests/wpt/web-platform-tests/shadow-dom/ShadowRoot-interface.html b/tests/wpt/web-platform-tests/shadow-dom/ShadowRoot-interface.html
index 6b49f93b3ec..bda361e5987 100644
--- a/tests/wpt/web-platform-tests/shadow-dom/ShadowRoot-interface.html
+++ b/tests/wpt/web-platform-tests/shadow-dom/ShadowRoot-interface.html
@@ -94,8 +94,10 @@ function testStyleSheets(mode) {
         var host = document.createElement('div');
         var shadowRoot = host.attachShadow({'mode': mode});
 
-        assert_equals(shadowRoot.styleSheets.length, 0, 'shadowRoot.styleSheets must be empty when the shadow root does not contain any stylesheets');
         shadowRoot.innerHTML = '<span></span><style> a.rule {} </style><style> b.rule {} </style>';
+        assert_equals(shadowRoot.styleSheets.length, 0, 'shadowRoot.styleSheets must be empty when the shadow root is not connected');
+
+        document.body.appendChild(host);
         assert_equals(shadowRoot.styleSheets.length, 2, 'shadowRoot.styleSheets must contain two items when the shadow root has two style elements');
         var styles = shadowRoot.querySelectorAll('style');
         assert_equals(shadowRoot.styleSheets[0], styles[0].sheet, 'shadowRoot.styleSheets[0] must be the first style element in the shadow root');
diff --git a/tests/wpt/web-platform-tests/shadow-dom/untriaged/styles/test-003.html b/tests/wpt/web-platform-tests/shadow-dom/untriaged/styles/test-003.html
index d5b8f48ab31..ab30e0cc67a 100644
--- a/tests/wpt/web-platform-tests/shadow-dom/untriaged/styles/test-003.html
+++ b/tests/wpt/web-platform-tests/shadow-dom/untriaged/styles/test-003.html
@@ -46,9 +46,6 @@ test(unit(function (ctx) {
     assert_equals(s.styleSheets.length, 0, 'There should be no style sheets');
 }), 'A_06_00_03_T02');
 
-//TODO Now this tests produces an error on Chromium because styleSheets.length
-//returns 0 when the shadow root is orphaned.
-//Tracking bug: http://crbug.com/392771
 test(unit(function (ctx) {
     var d = newRenderedHTMLDocument(ctx);
     var host = d.createElement('div');
@@ -60,8 +57,7 @@ test(unit(function (ctx) {
     style.textContent = 'div {width: 50%;}';
     s.appendChild(style);
 
-    // The following line fixes the issue on Chromium, http://crbug.com/392771
-    // d.body.appendChild(host);
+    d.body.appendChild(host);
     assert_equals(s.styleSheets.length, 1, 'Style sheet is not accessible via styleSheets');
 }), 'A_06_00_03_T03');
 </script>
diff --git a/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-pause-resume.tentative.html b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-pause-resume.tentative.html
new file mode 100644
index 00000000000..a7aa2bbf6fa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-pause-resume.tentative.html
@@ -0,0 +1,50 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<body>
+<script>
+// This test is tentative because timing isn't defined:
+// https://github.com/w3c/speech-api/issues/39
+// https://github.com/w3c/speech-api/issues/40
+async_test(t => {
+  assert_false(speechSynthesis.paused, 'initial paused state');
+
+  test_driver.bless('speechSynthesis.speak', t.step_func(() => {
+    const sentence = `long sentence which will take at least a few seconds to
+      utter so that it's possible to pause and resume before the end`;
+    const utter = new SpeechSynthesisUtterance(sentence);
+    t.add_cleanup(() => speechSynthesis.pause());
+    utter.onerror = t.unreached_func('error event');
+
+    speechSynthesis.speak(utter);
+
+    assert_false(speechSynthesis.paused, 'paused state after speak()');
+
+    utter.onstart = t.step_func(() => {
+      utter.onstart = null;
+      assert_false(speechSynthesis.paused, 'paused state at start event');
+
+      speechSynthesis.pause();
+
+      // paused state changes async, right before the pause event
+      assert_false(speechSynthesis.paused, 'paused state after pause()');
+
+      utter.onpause = t.step_func(() => {
+        utter.onpause = null;
+        assert_true(speechSynthesis.paused, 'paused state at pause event');
+
+        speechSynthesis.resume();
+
+        // paused state changes async, right before the resume event
+        assert_true(speechSynthesis.paused, 'paused state after resume()');
+
+        utter.onresume = t.step_func_done(() => {
+          assert_false(speechSynthesis.paused, 'paused state at resume event');
+        });
+      });
+    });
+  }));
+}, 'speechSynthesis.pause() and resume() state and events');
+</script>
diff --git a/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-with-activation-succeeds.html b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-events.html
similarity index 59%
rename from tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-with-activation-succeeds.html
rename to tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-events.html
index 55dec5c123f..babfe3c388e 100644
--- a/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-with-activation-succeeds.html
+++ b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesis-speak-events.html
@@ -7,9 +7,12 @@
 <script>
 async_test(t => {
   test_driver.bless('speechSynthesis.speak', t.step_func(() => {
-    const utter = new SpeechSynthesisUtterance('1');
-    utter.onend = t.step_func_done();
+    const utter = new SpeechSynthesisUtterance('test');
+    utter.onerror = t.unreached_func('error event');
     speechSynthesis.speak(utter);
+    utter.onstart = t.step_func(() => {
+      utter.onend = t.step_func_done();
+    });
   }));
-}, 'speechSynthesis.speak requires user activation');
+}, 'speechSynthesis.speak() fires start and end events');
 </script>
diff --git a/tests/wpt/web-platform-tests/tools/ci/jobs.py b/tests/wpt/web-platform-tests/tools/ci/jobs.py
index 6f3f6456016..97504dc8d9c 100644
--- a/tests/wpt/web-platform-tests/tools/ci/jobs.py
+++ b/tests/wpt/web-platform-tests/tools/ci/jobs.py
@@ -35,11 +35,21 @@ job_path_map = {
 }
 
 
+def _path_norm(path):
+    """normalize a path for both case and slashes (to /)"""
+    path = os.path.normcase(path)
+    if os.path.sep != "/":
+        # this must be after the normcase call as that does slash normalization
+        path = path.replace(os.path.sep, "/")
+    return path
+
+
 class Ruleset(object):
     def __init__(self, rules):
         self.include = []
         self.exclude = []
         for rule in rules:
+            rule = _path_norm(rule)
             self.add_rule(rule)
 
     def add_rule(self, rule):
@@ -52,9 +62,7 @@ class Ruleset(object):
         target.append(re.compile("^%s" % rule))
 
     def __call__(self, path):
-        if os.path.sep != "/":
-            path = path.replace(os.path.sep, "/")
-        path = os.path.normcase(path)
+        path = _path_norm(path)
         for item in self.exclude:
             if item.match(path):
                 return False
diff --git a/tests/wpt/web-platform-tests/tools/ci/tests/test_jobs.py b/tests/wpt/web-platform-tests/tools/ci/tests/test_jobs.py
index e94f4b68305..e888ad884a1 100644
--- a/tests/wpt/web-platform-tests/tools/ci/tests/test_jobs.py
+++ b/tests/wpt/web-platform-tests/tools/ci/tests/test_jobs.py
@@ -1,14 +1,8 @@
-import sys
-
-import pytest
-
 from tools.ci import jobs
 
 default_jobs = set(["lint", "manifest_upload"])
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_testharness():
     assert jobs.get_jobs(["resources/testharness.js"]) == default_jobs | set(["resources_unittest"])
     assert jobs.get_jobs(["resources/testharness.js"],
@@ -19,8 +13,6 @@ def test_testharness():
                          includes=["resources_unittest"]) == set()
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_stability():
     assert jobs.get_jobs(["dom/historical.html"],
                          includes=["stability"]) == set(["stability"])
@@ -51,8 +43,6 @@ def test_default():
     assert jobs.get_jobs(["README.md"]) == default_jobs
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_tools_unittest():
     assert jobs.get_jobs(["tools/ci/test/test_jobs.py"],
                          includes=["tools_unittest"]) == set(["tools_unittest"])
@@ -62,8 +52,6 @@ def test_tools_unittest():
                          includes=["tools_unittest"]) == set()
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_wptrunner_unittest():
     assert jobs.get_jobs(["tools/wptrunner/wptrunner/wptrunner.py"],
                          includes=["wptrunner_unittest"]) == set(["wptrunner_unittest"])
@@ -71,8 +59,6 @@ def test_wptrunner_unittest():
                          includes=["wptrunner_unittest"]) == set()
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_build_css():
     assert jobs.get_jobs(["css/css-build-testsuites.sh"],
                          includes=["build_css"]) == set(["build_css"])
@@ -82,8 +68,6 @@ def test_build_css():
                          includes=["build_css"]) == set()
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_update_built():
     assert jobs.get_jobs(["2dcontext/foo.html"],
                          includes=["update_built"]) == set(["update_built"])
@@ -93,16 +77,12 @@ def test_update_built():
                          includes=["update_built"]) == set(["update_built"])
 
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_wpt_integration():
     assert jobs.get_jobs(["tools/wpt/wpt.py"],
                          includes=["wpt_integration"]) == set(["wpt_integration"])
     assert jobs.get_jobs(["tools/wptrunner/wptrunner/wptrunner.py"],
                          includes=["wpt_integration"]) == set(["wpt_integration"])
 
-@pytest.mark.xfail(sys.platform == "win32",
-                   reason="https://github.com/web-platform-tests/wpt/issues/12949")
 def test_wpt_infrastructure():
     assert jobs.get_jobs(["tools/hammer.html"],
                          includes=["wptrunner_infrastructure"]) == set(["wptrunner_infrastructure"])
diff --git a/tests/wpt/web-platform-tests/tools/serve/serve.py b/tests/wpt/web-platform-tests/tools/serve/serve.py
index e66d38b3dae..31a08dbd016 100644
--- a/tests/wpt/web-platform-tests/tools/serve/serve.py
+++ b/tests/wpt/web-platform-tests/tools/serve/serve.py
@@ -19,7 +19,6 @@ from collections import defaultdict, OrderedDict
 from multiprocessing import Process, Event
 
 from localpaths import repo_root
-from six.moves import reload_module
 
 from manifest.sourcefile import read_script_metadata, js_meta_re, parse_variants
 from wptserve import server as wptserve, handlers
@@ -630,9 +629,12 @@ class WebSocketDaemon(object):
 
 
 def start_ws_server(host, port, paths, routes, bind_address, config, **kwargs):
-    # Ensure that when we start this in a new process we don't inherit the
-    # global lock in the logging module
-    reload_module(logging)
+    # Ensure that when we start this in a new process we have the global lock
+    # in the logging module unlocked
+    try:
+        logging._releaseLock()
+    except RuntimeError:
+        pass
     return WebSocketDaemon(host,
                            str(port),
                            repo_root,
@@ -643,9 +645,12 @@ def start_ws_server(host, port, paths, routes, bind_address, config, **kwargs):
 
 
 def start_wss_server(host, port, paths, routes, bind_address, config, **kwargs):
-    # Ensure that when we start this in a new process we don't inherit the
-    # global lock in the logging module
-    reload_module(logging)
+    # Ensure that when we start this in a new process we have the global lock
+    # in the logging module unlocked
+    try:
+        logging._releaseLock()
+    except RuntimeError:
+        pass
     return WebSocketDaemon(host,
                            str(port),
                            repo_root,
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 b4ce4381257..90f7e4615e0 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py
@@ -230,10 +230,10 @@ class BrowserManager(object):
             self.init_timer.cancel()
 
     def check_for_crashes(self):
-        self.browser.check_for_crashes()
+        return self.browser.check_for_crashes()
 
     def log_crash(self, test_id):
-        self.browser.log_crash(process=self.browser_pid, test=test_id)
+        return self.browser.log_crash(process=self.browser_pid, test=test_id)
 
     def is_alive(self):
         return self.browser.is_alive()
@@ -570,9 +570,8 @@ class TestRunnerManager(threading.Thread):
         expected = test.expected()
         status = status_subns.get(file_result.status, file_result.status)
 
-        if file_result.status in ("TIMEOUT", "EXTERNAL-TIMEOUT", "INTERNAL-ERROR"):
-            if self.browser.check_for_crashes():
-                status = "CRASH"
+        if self.browser.check_for_crashes():
+            status = "CRASH"
 
         self.test_count += 1
         is_unexpected = expected != status
diff --git a/tests/wpt/web-platform-tests/trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html b/tests/wpt/web-platform-tests/trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html
new file mode 100644
index 00000000000..5bd4003cfdd
--- /dev/null
+++ b/tests/wpt/web-platform-tests/trusted-types/DOMWindowTimers-setTimeout-setInterval.tentative.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+<body>
+<script>
+  async_test(t => {
+    window.timeoutTest = t;
+    let policy = createScript_policy(window, 'timeout');
+    let script = policy.createScript("window.timeoutTest.done();");
+    setTimeout(script);
+  }, "window.setTimeout assigned via policy (successful Script transformation).");
+
+  async_test(t => {
+    window.intervalTest = t;
+    let policy = createScript_policy(window, 'script');
+    let script = policy.createScript("window.intervalTest.done();");
+    setInterval(script);
+  }, "window.setInterval assigned via policy (successful Script transformation).");
+</script>
diff --git a/tests/wpt/web-platform-tests/trusted-types/Element-setAttributeNS.tentative.html b/tests/wpt/web-platform-tests/trusted-types/Element-setAttributeNS.tentative.html
new file mode 100644
index 00000000000..80128cfbf0e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/trusted-types/Element-setAttributeNS.tentative.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="support/helper.sub.js"></script>
+</head>
+<body>
+<script>
+    test(t => {
+      assert_element_accepts_trusted_html_set_ns(window, '0', t, 'a', 'b', RESULTS.HTML);
+    }, "Element.setAttributeNS assigned via policy (successful HTML transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_script_set_ns(window, '1', t, 'a', 'b', RESULTS.SCRIPT);
+    }, "Element.setAttributeNS assigned via policy (successful Script transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_script_url_set_ns(window, '2', t, 'a', 'b', RESULTS.SCRIPTURL);
+    }, "Element.setAttributeNS assigned via policy (successful ScriptURL transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_url_set_ns(window, '3', t, 'a', 'b', RESULTS.URL);
+    }, "Element.setAttributeNS assigned via policy (successful URL transformation)");
+</script>
diff --git a/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-DOMWindowTimers-setTimeout-setInterval.tentative.html b/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-DOMWindowTimers-setTimeout-setInterval.tentative.html
new file mode 100644
index 00000000000..f27678ab364
--- /dev/null
+++ b/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-DOMWindowTimers-setTimeout-setInterval.tentative.html
@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+
+<meta http-equiv="Content-Security-Policy" content="trusted-types">
+<body>
+<script>
+  // setTimeout tests
+  // TrustedScript assignments do not throw.
+  async_test(t => {
+    window.timeoutTest = t;
+    let policy = createScript_policy(window, 'timeout');
+    let script = policy.createScript("window.timeoutTest.done();");
+    setTimeout(script);
+  }, "window.setTimeout assigned via policy (successful Script transformation).");
+
+  // String assignments throw.
+  test(t => {
+    window.timeoutTestString = t.unreached_func();
+    assert_throws(new TypeError(), _ => {
+      setTimeout("window.timeoutTestString();");
+    });
+  }, "`window.setTimeout(string)` throws.");
+
+  // Null assignment throws.
+  test(t => {
+    assert_throws(new TypeError(), _ => {
+      setTimeout(null);
+    });
+  }, "`window.setTimeout(null)` throws.");
+
+  // setInterval tests
+  // TrustedScript assignments do not throw.
+  async_test(t => {
+    window.intervalTest = t;
+    let policy = createScript_policy(window, 'script');
+    let script = policy.createScript("window.intervalTest.done();");
+    setInterval(script);
+  }, "window.setInterval assigned via policy (successful Script transformation).");
+
+  // String assignments throw.
+  test(t => {
+    window.intervalTestString = t.unreached_func();
+    assert_throws(new TypeError(), _ => {
+      setInterval("window.intervalTestString()");
+    });
+  }, "`window.setInterval(string)` throws.");
+
+  // Null assignment throws.
+  test(t => {
+    assert_throws(new TypeError(), _ => {
+      setInterval(null);
+    });
+  }, "`window.setInterval(null)` throws.");
+</script>
diff --git a/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-Element-setAttributeNS.tentative.html b/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-Element-setAttributeNS.tentative.html
new file mode 100644
index 00000000000..5a72992100c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/trusted-types/block-string-assignment-to-Element-setAttributeNS.tentative.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="support/helper.sub.js"></script>
+
+  <meta http-equiv="Content-Security-Policy" content="trusted-types">
+</head>
+<body>
+<script>
+    test(t => {
+      assert_element_accepts_trusted_html_set_ns(window, '0', t, 'a', 'b', RESULTS.HTML);
+    }, "Element.setAttributeNS assigned via policy (successful HTML transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_script_set_ns(window, '1', t, 'a', 'b', RESULTS.SCRIPT);
+    }, "Element.setAttributeNS assigned via policy (successful Script transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_script_url_set_ns(window, '2', t, 'a', 'b', RESULTS.SCRIPTURL);
+    }, "Element.setAttributeNS assigned via policy (successful ScriptURL transformation)");
+
+    test(t => {
+      assert_element_accepts_trusted_url_set_ns(window, '3', t, 'a', 'b', RESULTS.URL);
+    }, "Element.setAttributeNS assigned via policy (successful URL transformation)");
+
+    test(t => {
+      assert_throws_no_trusted_type_set_ns('a', 'b', 'A string');
+    }, "`Element.setAttributeNS = string` throws");
+
+    test(t => {
+      assert_throws_no_trusted_type_set_ns('a', 'b', null);
+    }, "`Element.setAttributeNS = null` throws");
+</script>
diff --git a/tests/wpt/web-platform-tests/trusted-types/support/helper.sub.js b/tests/wpt/web-platform-tests/trusted-types/support/helper.sub.js
index 1ad5b4ef0c6..75874e5b3c2 100644
--- a/tests/wpt/web-platform-tests/trusted-types/support/helper.sub.js
+++ b/tests/wpt/web-platform-tests/trusted-types/support/helper.sub.js
@@ -126,3 +126,49 @@ function assert_element_accepts_non_trusted_type_explicit_set(tag, attribute, va
   elem.setAttribute(attribute, value);
   assert_equals(elem[attribute] + "", expected);
 }
+
+let namespace = 'http://www.w3.org/1999/xhtml';
+function assert_element_accepts_trusted_html_set_ns(win, c, t, tag, attribute, expected) {
+  let p = createHTML_policy(win, c);
+  let html = p.createHTML(INPUTS.HTML);
+  assert_element_accepts_trusted_type_set_ns(tag, attribute, html, expected);
+}
+
+function assert_element_accepts_trusted_script_set_ns(win, c, t, tag, attribute, expected) {
+  let p = createScript_policy(win, c);
+  let script = p.createScript(INPUTS.SCRIPT);
+  assert_element_accepts_trusted_type_set_ns(tag, attribute, script, expected);
+}
+
+function assert_element_accepts_trusted_script_url_set_ns(win, c, t, tag, attribute, expected) {
+  let p = createScriptURL_policy(win, c);
+  let scripturl = p.createScriptURL(INPUTS.SCRIPTURL);
+  assert_element_accepts_trusted_type_set_ns(tag, attribute, scripturl, expected);
+}
+
+function assert_element_accepts_trusted_url_set_ns(win, c, t, tag, attribute, expected) {
+  let p = createURL_policy(win, c);
+  let url = p.createURL(INPUTS.URL);
+  assert_element_accepts_trusted_type_set_ns(tag, attribute, url, expected);
+}
+
+function assert_element_accepts_trusted_type_set_ns(tag, attribute, value, expected) {
+  let elem = document.createElement(tag);
+  elem.setAttributeNS(namespace, attribute, value);
+  let attr_node = elem.getAttributeNodeNS(namespace, attribute);
+  assert_equals(attr_node.value + "", expected);
+}
+
+function assert_throws_no_trusted_type_set_ns(tag, attribute, value) {
+  let elem = document.createElement(tag);
+  assert_throws(new TypeError(), _ => {
+    elem.setAttributeNS(namespace, attribute, value);
+  });
+}
+
+function assert_element_accepts_non_trusted_type_set_ns(tag, attribute, value, expected) {
+  let elem = document.createElement(tag);
+  elem.setAttributeNS(namespace, attribute, value);
+  let attr_node = elem.getAttributeNodeNS(namespace, attribute);
+  assert_equals(attr_node.value + "", expected);
+}
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-gainnode-interface/test-gainnode.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-gainnode-interface/test-gainnode.html
deleted file mode 100644
index f0c8e42044b..00000000000
--- a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-gainnode-interface/test-gainnode.html
+++ /dev/null
@@ -1,119 +0,0 @@
-<!doctype html>
-
-<!--
-Tests that GainNode is properly scaling the gain.
-We'll render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1.
-The 11th note will be of gain 0.0, so it should be silent (at the end in the rendered output).
-
-Based on a test from the WebKit test suite
-(https://github.com/WebKit/webkit/blob/master/LayoutTests/webaudio/gain.html)
--->
-
-<html class="a">
- <head>
-  <title>GainNode interface</title>
-  <script src="/resources/testharness.js"></script>
-  <script src="/resources/testharnessreport.js"></script>
-  <script src="/webaudio/js/helpers.js"></script>
-  <script src="/webaudio/js/buffer-loader.js"></script>
- </head>
- <body class="a">
-  <div id="log"></div>
-  <script>
-var gainNodeTest = async_test("GainNode");
-
-var sampleRate = 44100.0;
-var bufferDurationSeconds = 0.125;
-var numberOfNotes = 11;
-var noteSpacing = bufferDurationSeconds + 0.020; // leave 20ms of silence between each "note"
-var lengthInSeconds = numberOfNotes * noteSpacing;
-
-var context = 0;
-var expectedBuffer = 0;
-var actualBuffer = 0;
-var sinWaveBuffer = 0;
-
-function createSinWaveBuffer(lengthInSeconds, frequency) {
-  var audioBuffer = context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate);
-
-  var n = audioBuffer.length;
-  var channelL = audioBuffer.getChannelData(0);
-  var channelR = audioBuffer.getChannelData(1);
-
-  for (var i = 0; i < n; ++i) {
-    channelL[i] = Math.sin(frequency * 2.0*Math.PI * i / sampleRate);
-    channelR[i] = channelL[i];
-  }
-
-  return audioBuffer;
-}
-
-function playNote(time, gain) {
-  var source = context.createBufferSource();
-  source.buffer = sinWaveBuffer;
-
-  var gainNode = context.createGain();
-  gainNode.gain.value = gain;
-
-  source.connect(gainNode);
-  gainNode.connect(context.destination);
-
-  source.start(time);
-}
-
-function loadExpectedBuffer(event) {
-  actualBuffer = event.renderedBuffer;
-
-  bufferLoader = new BufferLoader(
-    context,
-    ['/webaudio/the-audio-api/the-gainnode-interface/gain-expected.wav'],
-    bufferLoadCompleted
-  );
-  bufferLoader.load();
-};
-
-function bufferLoadCompleted(buffer) {
-  compareExpectedWithActualBuffer(buffer);
-};
-
-setup( function() {
-  // Create offline audio context.
-  context = new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate);
-
-  // Create a buffer for a short "note".
-  sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0);
-
-  // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1.
-  // The last note will be of gain 0.0, so shouldn't be perceptible in the rendered output.
-  for (var i = 0; i < numberOfNotes; ++i) {
-    var time = i * noteSpacing;
-    var gain = 1.0 - i / (numberOfNotes - 1);
-    playNote(time, gain);
-  }
-
-  context.oncomplete = loadExpectedBuffer;
-  context.startRendering();
-}, {timeout: 10000});
-
-function compareExpectedWithActualBuffer(expected) {
-  var expectedBuffer = expected[0];
-
-  gainNodeTest.step(function() {
-    assert_array_approx_equals(expectedBuffer.getChannelData(0),
-                               actualBuffer.getChannelData(0),
-                               1e-4,
-                               "comparing expected and rendered buffers (channel 0)");
-  });
-
-  gainNodeTest.step(function() {
-    assert_array_approx_equals(expectedBuffer.getChannelData(1),
-                               actualBuffer.getChannelData(1),
-                               1e-4,
-                               "comparing expected and rendered buffers (channel 1)");
-  });
-
-  gainNodeTest.done();
-};
-  </script>
- </body>
-</html>