diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 6935c84d7bb..0609c7b29a9 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -129813,6 +129813,342 @@
      {}
     ]
    ],
+   "css/css-images/image-orientation/image-orientation-default.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-default.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-default-ref.html",
+       "=="
+      ]
+     ],
+     {
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+       [
+        null,
+        [
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+          10,
+          10
+         ],
+         [
+          100,
+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html",
+       "=="
+      ]
+     ],
+     {
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+        null,
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+          10
+         ],
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+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-none-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
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+          10
+         ],
+         [
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+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-composited.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-composited.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html",
+       "=="
+      ]
+     ],
+     {
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+       [
+        null,
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+          10
+         ],
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-content-images.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-content-images.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-content-images-ref.html",
+       "=="
+      ]
+     ],
+     {
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+       [
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+          10
+         ],
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-dynamic1.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-dynamic1.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
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+          10
+         ],
+         [
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+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-dynamic2.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-dynamic2.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-none-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
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+        null,
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+          10
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image-image-document.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-image-document.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-image-document-ref.html",
+       "=="
+      ]
+     ],
+     {
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+       [
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+        [
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+          10
+         ],
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+          100
+         ]
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-from-image.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
+         [
+          10,
+          10
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+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-none-content-images.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-none-content-images.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-none-content-images-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
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+          10
+         ],
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+          100
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+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-none-image-document.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-none-image-document.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-none-image-document-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
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+          10
+         ],
+         [
+          100,
+          100
+         ]
+        ]
+       ]
+      ]
+     }
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-none.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-none.html",
+     [
+      [
+       "/css/css-images/image-orientation/reference/image-orientation-none-ref.html",
+       "=="
+      ]
+     ],
+     {
+      "fuzzy": [
+       [
+        null,
+        [
+         [
+          10,
+          10
+         ],
+         [
+          100,
+          100
+         ]
+        ]
+       ]
+      ]
+     }
+    ]
+   ],
    "css/css-images/infinite-radial-gradient-refcrash.html": [
     [
      "css/css-images/infinite-radial-gradient-refcrash.html",
@@ -134421,6 +134757,18 @@
      {}
     ]
    ],
+   "css/css-multicol/intrinsic-width-change-column-count.html": [
+    [
+     "css/css-multicol/intrinsic-width-change-column-count.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square.xht",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-multicol/large-actual-column-count.html": [
     [
      "css/css-multicol/large-actual-column-count.html",
@@ -140613,6 +140961,30 @@
      {}
     ]
    ],
+   "css/css-pseudo/marker-content-017.html": [
+    [
+     "css/css-pseudo/marker-content-017.html",
+     [
+      [
+       "/css/css-pseudo/marker-content-017-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-pseudo/marker-content-018.html": [
+    [
+     "css/css-pseudo/marker-content-018.html",
+     [
+      [
+       "/css/css-pseudo/marker-content-018-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-pseudo/marker-display-dynamic-001.html": [
     [
      "css/css-pseudo/marker-display-dynamic-001.html",
@@ -143389,6 +143761,18 @@
      {}
     ]
    ],
+   "css/css-ruby/ruby-bidi-003.html": [
+    [
+     "css/css-ruby/ruby-bidi-003.html",
+     [
+      [
+       "/css/css-ruby/ruby-bidi-003-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-ruby/ruby-box-generation-001.html": [
     [
      "css/css-ruby/ruby-box-generation-001.html",
@@ -203303,6 +203687,18 @@
      {}
     ]
    ],
+   "dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html": [
+    [
+     "dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html",
+     [
+      [
+       "/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "encoding/eof-shift_jis.html": [
     [
      "encoding/eof-shift_jis.html",
@@ -206447,6 +206843,18 @@
      {}
     ]
    ],
+   "html/semantics/document-metadata/the-link-element/link-type-attribute.html": [
+    [
+     "html/semantics/document-metadata/the-link-element/link-type-attribute.html",
+     [
+      [
+       "/html/semantics/document-metadata/the-link-element/link-type-attribute-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "html/semantics/document-metadata/the-link-element/stylesheet-change-href.html": [
     [
      "html/semantics/document-metadata/the-link-element/stylesheet-change-href.html",
@@ -254972,6 +255380,81 @@
    "css/css-images/gradients-with-transparent-ref.html": [
     []
    ],
+   "css/css-images/image-orientation/reference/image-orientation-default-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-from-image-content-images-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-from-image-image-document-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-from-image-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-none-content-images-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-none-image-document-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/reference/image-orientation-none-ref.html": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-1-ul-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-1-ul.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-2-ur-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-2-ur.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-3-lr-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-3-lr.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-4-lol-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-4-lol.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-5-lu-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-5-lu.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-6-ru-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-6-ru.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-7-rl-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-7-rl.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-8-llo-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-8-llo.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-9-u-pre-rotated.jpg": [
+    []
+   ],
+   "css/css-images/image-orientation/support/exif-orientation-9-u.jpg": [
+    []
+   ],
    "css/css-images/infinite-radial-gradient-crash-ref.html": [
     []
    ],
@@ -256871,6 +257354,12 @@
    "css/css-pseudo/marker-content-016-ref.html": [
     []
    ],
+   "css/css-pseudo/marker-content-017-ref.html": [
+    []
+   ],
+   "css/css-pseudo/marker-content-018-ref.html": [
+    []
+   ],
    "css/css-pseudo/marker-font-properties-ref.html": [
     []
    ],
@@ -257609,6 +258098,9 @@
    "css/css-ruby/ruby-bidi-002-ref.html": [
     []
    ],
+   "css/css-ruby/ruby-bidi-003-ref.html": [
+    []
+   ],
    "css/css-ruby/ruby-box-generation-001-ref.html": [
     []
    ],
@@ -268997,6 +269489,9 @@
    "dom/nodes/query-target-in-load-event.part.html": [
     []
    ],
+   "dom/nodes/remove-from-shadow-host-and-adopt-into-iframe-ref.html": [
+    []
+   ],
    "dom/nodes/selectors.js": [
     []
    ],
@@ -270959,6 +271454,18 @@
    "fetch/data-urls/resources/data-urls.json": [
     []
    ],
+   "fetch/h1-parsing/resources/README.md": [
+    []
+   ],
+   "fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis": [
+    []
+   ],
+   "fetch/h1-parsing/resources/document-with-0x00-in-header.py": [
+    []
+   ],
+   "fetch/h1-parsing/resources/script-with-0x00-in-header.py": [
+    []
+   ],
    "fetch/http-cache/README.md": [
     []
    ],
@@ -272411,6 +272918,9 @@
    "html/browsers/origin/cross-origin-objects/frame.html": [
     []
    ],
+   "html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html": [
+    []
+   ],
    "html/browsers/origin/cross-origin-objects/win-documentdomain.sub.html": [
     []
    ],
@@ -276287,6 +276797,9 @@
    "html/semantics/document-metadata/the-link-element/link-rel-attribute-ascii-case-insensitive-notref.html": [
     []
    ],
+   "html/semantics/document-metadata/the-link-element/link-type-attribute-ref.html": [
+    []
+   ],
    "html/semantics/document-metadata/the-link-element/resources/bad.css": [
     []
    ],
@@ -281543,6 +282056,9 @@
    "portals/resources/postmessage-referrer.sub.html": [
     []
    ],
+   "portals/resources/predecessor-fires-unload-watch-unload.html": [
+    []
+   ],
    "portals/resources/simple-portal-adopts-and-activates-predecessor.html": [
     []
    ],
@@ -294929,6 +295445,9 @@
    "webxr/resources/webxr_test_constants.js": [
     []
    ],
+   "webxr/resources/webxr_test_constants_fake_world.js": [
+    []
+   ],
    "webxr/resources/webxr_util.js": [
     []
    ],
@@ -326497,6 +327016,18 @@
      {}
     ]
    ],
+   "css/css-images/image-orientation/image-orientation-from-image-computed-style.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-from-image-computed-style.html",
+     {}
+    ]
+   ],
+   "css/css-images/image-orientation/image-orientation-none-computed-style.html": [
+    [
+     "css/css-images/image-orientation/image-orientation-none-computed-style.html",
+     {}
+    ]
+   ],
    "css/css-images/inheritance.html": [
     [
      "css/css-images/inheritance.html",
@@ -329571,6 +330102,12 @@
      {}
     ]
    ],
+   "css/css-shadow-parts/style-sharing.html": [
+    [
+     "css/css-shadow-parts/style-sharing.html",
+     {}
+    ]
+   ],
    "css/css-shapes/animation/shape-image-threshold-interpolation.html": [
     [
      "css/css-shapes/animation/shape-image-threshold-interpolation.html",
@@ -357590,6 +358127,12 @@
      {}
     ]
    ],
+   "fetch/h1-parsing/resources-with-0x00-in-header.window.js": [
+    [
+     "fetch/h1-parsing/resources-with-0x00-in-header.window.html",
+     {}
+    ]
+   ],
    "fetch/http-cache/304-update.html": [
     [
      "fetch/http-cache/304-update.html",
@@ -360001,6 +360544,12 @@
      {}
     ]
    ],
+   "html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html": [
+    [
+     "html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html",
+     {}
+    ]
+   ],
    "html/browsers/origin/cross-origin-objects/cross-origin-objects-on-new-window.html": [
     [
      "html/browsers/origin/cross-origin-objects/cross-origin-objects-on-new-window.html",
@@ -393536,6 +394085,12 @@
      {}
     ]
    ],
+   "portals/predecessor-fires-unload.html": [
+    [
+     "portals/predecessor-fires-unload.html",
+     {}
+    ]
+   ],
    "preload/avoid-delaying-onload-link-preload.html": [
     [
      "preload/avoid-delaying-onload-link-preload.html",
@@ -432477,6 +433032,14 @@
      }
     ]
    ],
+   "webrtc/RTCDataChannel-close.html": [
+    [
+     "webrtc/RTCDataChannel-close.html",
+     {
+      "timeout": "long"
+     }
+    ]
+   ],
    "webrtc/RTCDataChannel-id.html": [
     [
      "webrtc/RTCDataChannel-id.html",
@@ -432583,6 +433146,12 @@
      {}
     ]
    ],
+   "webrtc/RTCPeerConnection-close.html": [
+    [
+     "webrtc/RTCPeerConnection-close.html",
+     {}
+    ]
+   ],
    "webrtc/RTCPeerConnection-connectionState.https.html": [
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@@ -475579,7 +476148,7 @@
    "support"
   ],
   "common/security-features/README.md": [
-   "98afe1af1be8d6329f9ae687320d4bd4797ca2c8",
+   "c19874653a7cac4d314fd9dd0bf921082c6f8d70",
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   ],
   "common/security-features/resources/common.sub.js": [
@@ -584446,6 +585015,162 @@
    "6947515f7e4634fc3f240ffda91c6f5bdac862ce",
    "visual"
   ],
+  "css/css-images/image-orientation/image-orientation-default.html": [
+   "36fb1a665ffa858f716195f0cafd04d4d7388c85",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html": [
+   "26db7da18453817947a5e974f993222ec4c92b17",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html": [
+   "f6474afaa0ab942a3574433ac93492f7ee20bac6",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-composited.html": [
+   "596e497ed3e2b86dfea3e191951b4c3483b0abc4",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-computed-style.html": [
+   "32933244c384063016d4880bc7da2a590275b54b",
+   "testharness"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-content-images.html": [
+   "36a2a343168ddbec199fe41bc887e2c7719248af",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-dynamic1.html": [
+   "15e05884cf5594702c172b81587ea578714aa4e0",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-dynamic2.html": [
+   "c0df221337e036cd6ebf5dc306b2bc6a00e204ff",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image-image-document.html": [
+   "793fc017e6f91746c23078f9f766d04dd1aae22d",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-from-image.html": [
+   "f1343e9f23fa0c5eeae8134cff269cfc6e7308d7",
+   "reftest"
+  ],
+  "css/css-images/image-orientation/image-orientation-none-computed-style.html": [
+   "49919288b552b760ed5230adcad09eb255a6546b",
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   ],
   "webrtc/RTCPeerConnection-constructor.html": [
@@ -732247,13 +733064,17 @@
    "support"
   ],
   "webxr/resources/webxr_test_asserts.js": [
-   "863b994572441d0efdbe92dbd8aec29f9152069f",
+   "38f1364ce03ce96890cda97dcc226b8e472dd332",
    "support"
   ],
   "webxr/resources/webxr_test_constants.js": [
    "3d9bfa2082baa90670131774920805a7f16cd5a2",
    "support"
   ],
+  "webxr/resources/webxr_test_constants_fake_world.js": [
+   "0601f54fce994d027ae17dc958cee6d746440c35",
+   "support"
+  ],
   "webxr/resources/webxr_util.js": [
    "85821d4d3d5d7fd953cace5e7ea7bacc9d3b7dab",
    "support"
@@ -732379,7 +733200,7 @@
    "testharness"
   ],
   "webxr/xrRigidTransform_inverse.https.html": [
-   "a314f6b55a21b03abe5fb4ae0b32bc5c458e09f6",
+   "3098fb64936349e58aa6a919a8ec97d6334e5e02",
    "testharness"
   ],
   "webxr/xrRigidTransform_matrix.https.html": [
@@ -735587,7 +736408,7 @@
    "support"
   ],
   "xhr/resources/parse-headers.py": [
-   "fdc626539e842f6660f533a3684da72e719cef09",
+   "c661f22c3e9eb6eb8ded5c7160111221dc4ac319",
    "support"
   ],
   "xhr/resources/pass.txt": [
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-default.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-default.html.ini
new file mode 100644
index 00000000000..057dabc0515
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-default.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-default.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html.ini
new file mode 100644
index 00000000000..aa1989bb77c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-composited-dynamic1.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html.ini
new file mode 100644
index 00000000000..5394b8fab7b
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-composited-dynamic2.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited.html.ini
new file mode 100644
index 00000000000..8a34587ad95
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-composited.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-composited.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-computed-style.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-computed-style.html.ini
new file mode 100644
index 00000000000..57324a9b0df
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-computed-style.html.ini
@@ -0,0 +1,4 @@
+[image-orientation-from-image-computed-style.html]
+  [image-orientation:from-image computed style reports correct values]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-content-images.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-content-images.html.ini
new file mode 100644
index 00000000000..35dbe9c5b2c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-content-images.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-content-images.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html.ini
new file mode 100644
index 00000000000..ce44e995bf5
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-dynamic1.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html.ini
new file mode 100644
index 00000000000..f7ee1605d04
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-dynamic2.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-image-document.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-image-document.html.ini
new file mode 100644
index 00000000000..4b8e7851463
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image-image-document.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image-image-document.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image.html.ini
new file mode 100644
index 00000000000..341fd5a2699
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-from-image.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-from-image.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-computed-style.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-computed-style.html.ini
new file mode 100644
index 00000000000..f0c6302697b
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-computed-style.html.ini
@@ -0,0 +1,4 @@
+[image-orientation-none-computed-style.html]
+  [image-orientation:none computed style reports correct values]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-content-images.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-content-images.html.ini
new file mode 100644
index 00000000000..8545087eb40
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-content-images.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-none-content-images.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-image-document.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-image-document.html.ini
new file mode 100644
index 00000000000..dfbaa35f28c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none-image-document.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-none-image-document.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none.html.ini b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none.html.ini
new file mode 100644
index 00000000000..262691575b2
--- /dev/null
+++ b/tests/wpt/metadata/css/css-images/image-orientation/image-orientation-none.html.ini
@@ -0,0 +1,2 @@
+[image-orientation-none.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
index 7bc6ba992af..9997350495a 100644
--- a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
@@ -9,6 +9,3 @@
   [throws if handleEvent is thruthy and not callable]
     expected: NOTRUN
 
-  [looks up handleEvent method on every event dispatch]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
deleted file mode 100644
index e38782d8c85..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[elementFromPoint-001.html]
-  [CSSOM View - 5 - extensions to the Document interface]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
deleted file mode 100644
index e181af5397f..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[elementsFromPoint-invalid-cases.html]
-  [The root element is the last element returned for otherwise empty queries within the viewport]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html.ini b/tests/wpt/metadata/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html.ini
new file mode 100644
index 00000000000..8ab70585687
--- /dev/null
+++ b/tests/wpt/metadata/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html.ini
@@ -0,0 +1,2 @@
+[remove-from-shadow-host-and-adopt-into-iframe.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/fetch/content-type/response.window.js.ini b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
index 1fb9808a893..9fdb1aa8bf6 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -1,7 +1,7 @@
 [response.window.html]
   expected: TIMEOUT
   [fetch(): combined response Content-Type: text/plain ]
-    expected: FAIL
+    expected: NOTRUN
 
   [Response: combined response Content-Type: text/plain;charset=gbk text/plain;charset=windows-1252]
     expected: NOTRUN
@@ -64,7 +64,7 @@
     expected: NOTRUN
 
   [fetch(): combined response Content-Type: text/html text/plain]
-    expected: FAIL
+    expected: NOTRUN
 
   [Request: combined response Content-Type: text/html;charset=gbk text/plain text/html]
     expected: NOTRUN
@@ -76,13 +76,13 @@
     expected: NOTRUN
 
   [Response: combined response Content-Type: text/plain ]
-    expected: FAIL
+    expected: NOTRUN
 
   [fetch(): combined response Content-Type: text/plain;charset=gbk text/plain]
     expected: NOTRUN
 
   [Request: combined response Content-Type: text/html text/plain]
-    expected: FAIL
+    expected: NOTRUN
 
   [<iframe>: combined response Content-Type: text/plain;charset=gbk text/html;charset=windows-1254]
     expected: FAIL
@@ -115,7 +115,7 @@
     expected: NOTRUN
 
   [Response: combined response Content-Type: text/html text/plain]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [<iframe>: combined response Content-Type: text/plain;charset=gbk text/plain]
     expected: FAIL
@@ -139,7 +139,7 @@
     expected: FAIL
 
   [Response: combined response Content-Type:  text/plain]
-    expected: FAIL
+    expected: TIMEOUT
 
   [<iframe>: combined response Content-Type: text/plain;charset=gbk text/plain;charset=windows-1252]
     expected: FAIL
@@ -235,7 +235,7 @@
     expected: FAIL
 
   [Request: combined response Content-Type: text/plain ]
-    expected: FAIL
+    expected: NOTRUN
 
   [Response: combined response Content-Type: text/html */*;charset=gbk]
     expected: NOTRUN
@@ -271,7 +271,7 @@
     expected: FAIL
 
   [fetch(): separate response Content-Type: text/html text/plain]
-    expected: FAIL
+    expected: NOTRUN
 
   [Request: combined response Content-Type: text/html;" text/plain]
     expected: NOTRUN
@@ -309,18 +309,30 @@
   [<iframe>: separate response Content-Type: */* text/html]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html;" text/plain]
     expected: FAIL
 
   [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html */*]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
+  [<iframe>: combined response Content-Type: text/html;" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html */*]
+    expected: FAIL
+
+  [fetch(): separate response Content-Type: text/plain ]
+    expected: NOTRUN
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/h1-parsing/resources-with-0x00-in-header.window.js.ini b/tests/wpt/metadata/fetch/h1-parsing/resources-with-0x00-in-header.window.js.ini
new file mode 100644
index 00000000000..9b4906adfc8
--- /dev/null
+++ b/tests/wpt/metadata/fetch/h1-parsing/resources-with-0x00-in-header.window.js.ini
@@ -0,0 +1,4 @@
+[resources-with-0x00-in-header.window.html]
+  [Expect network error for frame navigation to resource with 0x00 in a header]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
index c6486926191..54f7f890b05 100644
--- a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
+++ b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
@@ -5,14 +5,11 @@
     expected: FAIL
 
   [Embedded credentials are treated as network errors in frames.]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Embedded credentials are treated as network errors in new windows.]
     expected: TIMEOUT
 
   [Embedded credentials matching the top-level are treated as network errors for cross-origin URLs.]
-    expected: TIMEOUT
-
-  [Embedded credentials matching the top-level are not treated as network errors for relative URLs.]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
deleted file mode 100644
index 87b07c3e670..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_1.html]
-  [Multiple history traversals from the same task]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
deleted file mode 100644
index 51f8272a6de..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_3.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html.ini b/tests/wpt/metadata/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html.ini
new file mode 100644
index 00000000000..684b01a4733
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html.ini
@@ -0,0 +1,4 @@
+[cross-origin-due-to-document-domain-only.html]
+  [Cross-origin due to document.domain]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini
deleted file mode 100644
index 16fa2c5cfc1..00000000000
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[creating_browsing_context_test_01.html]
-  [first argument: absolute url]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
index c12c0f8ae48..6852d7663de 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
@@ -1,4 +1,8 @@
 [skip-document-with-fragment.html]
+  expected: TIMEOUT
   [Autofocus elements in iframed documents with URL fragments should be skipped.]
     expected: FAIL
 
+  [Autofocus elements in top-level browsing context's documents with URI fragments should be skipped.]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/semantics/document-metadata/the-link-element/link-type-attribute.html.ini b/tests/wpt/metadata/html/semantics/document-metadata/the-link-element/link-type-attribute.html.ini
new file mode 100644
index 00000000000..31c7aa49cfd
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/document-metadata/the-link-element/link-type-attribute.html.ini
@@ -0,0 +1,2 @@
+[link-type-attribute.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index dc856a3d5a3..e440b1e38c6 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,5 +1,6 @@
 [iframe_sandbox_popups_nonescaping-3.html]
   type: testharness
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
 
diff --git a/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini b/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
index 1c7ec9ce1db..b4090ef9fe2 100644
--- a/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
+++ b/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
@@ -1,4 +1,5 @@
 [crossorigin-sandwich-TAO.sub.html]
+  expected: ERROR
   [There should be one entry.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
deleted file mode 100644
index 663a1f8fa30..00000000000
--- a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index 064cf47545b..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/web-platform-tests/common/security-features/README.md b/tests/wpt/web-platform-tests/common/security-features/README.md
index 98afe1af1be..c19874653a7 100644
--- a/tests/wpt/web-platform-tests/common/security-features/README.md
+++ b/tests/wpt/web-platform-tests/common/security-features/README.md
@@ -143,7 +143,7 @@ For examples of spec JSON files, see [referrer-policy/spec.src.json](../../refer
 
 * **`excluded_tests`**
 
-  List of ```test_expansion``` patterns expanding into selections which get skipped when generating the tests (aka. blacklisting/suppressing)
+  List of ```test_expansion``` patterns expanding into selections which get skipped when generating the tests (aka. blocklisting/suppressing)
 
 * **`test_expansion_schema`**
 
@@ -188,9 +188,9 @@ A **selection** is a single **test instance** (scenario) with explicit values th
 
 Taking the spec JSON, the generator follows this algorithm:
 
-* Expand all ```excluded_tests``` to create a blacklist of selections
+* Expand all ```excluded_tests``` to create a blocklist of selections
 
-* For each specification requirement: Expand the ```test_expansion``` pattern into selections and check each against the blacklist, if not marked as suppresed, generate the test resources for the selection
+* For each specification requirement: Expand the ```test_expansion``` pattern into selections and check each against the blocklist, if not marked as suppresed, generate the test resources for the selection
 
 
 ### Source Contexts
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-default.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-default.html
new file mode 100644
index 00000000000..36fb1a665ff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-default.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation defaults to from-image</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-default-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       no image-orientation property is given.</p>
+    <div>
+        <img src="support/exif-orientation-1-ul.jpg"/>
+        <br>Normal
+    </div>
+    <div>
+        <img src="support/exif-orientation-2-ur.jpg"/>
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img src="support/exif-orientation-3-lr.jpg"/>
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img src="support/exif-orientation-4-lol.jpg"/>
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-5-lu.jpg"/>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-6-ru.jpg"/>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img src="support/exif-orientation-7-rl.jpg"/>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-8-llo.jpg"/>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img src="support/exif-orientation-9-u.jpg"/>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html
new file mode 100644
index 00000000000..26db7da1845
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic1.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: change from image-orientation: none to from-image with will-change: transform</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;}
+    img {
+        will-change: transform;
+        border: 1px solid black;
+        image-orientation: none;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+    function runTest() {
+        for (var i = 1; i <= 9; i++) {
+            document.getElementById("img" + i).style.imageOrientation = "from-image";
+        }
+    }
+</script>
+</head>
+<body onload="runTest()">
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div>
+        <img id="img1" src="support/exif-orientation-1-ul.jpg"/>
+        <br>Normal
+    </div>
+    <div>
+        <img id="img2" src="support/exif-orientation-2-ur.jpg"/>
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img id="img3" src="support/exif-orientation-3-lr.jpg"/>
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img id="img4" src="support/exif-orientation-4-lol.jpg"/>
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img id="img5" src="support/exif-orientation-5-lu.jpg"/>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img id="img6" src="support/exif-orientation-6-ru.jpg"/>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img id="img7" src="support/exif-orientation-7-rl.jpg"/>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img id="img8" src="support/exif-orientation-8-llo.jpg"/>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img id="img9" src="support/exif-orientation-9-u.jpg"/>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html
new file mode 100644
index 00000000000..f6474afaa0a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited-dynamic2.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: change from image-orientation: from-image to none with will-change: transform</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-none-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        will-change: transform;
+        border: 1px solid black;
+        image-orientation: from-image;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+    function runTest() {
+        for (var i = 1; i <= 9; i++) {
+            document.getElementById("img" + i).style.imageOrientation = "none";
+        }
+    }
+</script>
+</head>
+<body onload="runTest()">
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div>
+        <img id="img1" src="support/exif-orientation-1-ul.jpg"/>
+    </div>
+    <div>
+        <img id="img2" src="support/exif-orientation-2-ur.jpg"/>
+    </div>
+    <div>
+        <img id="img3" src="support/exif-orientation-3-lr.jpg"/>
+    </div>
+    <div>
+        <img id="img4" src="support/exif-orientation-4-lol.jpg"/>
+    </div>
+    <div>
+        <img id="img5" src="support/exif-orientation-5-lu.jpg"/>
+    </div>
+    <div>
+        <img id="img6" src="support/exif-orientation-6-ru.jpg"/>
+    </div>
+    <div>
+        <img id="img7" src="support/exif-orientation-7-rl.jpg"/>
+    </div>
+    <div>
+        <img id="img8" src="support/exif-orientation-8-llo.jpg"/>
+    </div>
+    <div>
+        <img id="img9" src="support/exif-orientation-9-u.jpg"/>
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited.html
new file mode 100644
index 00000000000..596e497ed3e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-composited.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image with will-change: transform</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+        image-orientation: from-image;
+    }
+    img {
+        will-change: transform;
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div>
+        <img src="support/exif-orientation-1-ul.jpg"/>
+        <br>Normal
+    </div>
+    <div>
+        <img src="support/exif-orientation-2-ur.jpg"/>
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img src="support/exif-orientation-3-lr.jpg"/>
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img src="support/exif-orientation-4-lol.jpg"/>
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-5-lu.jpg"/>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-6-ru.jpg"/>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img src="support/exif-orientation-7-rl.jpg"/>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-8-llo.jpg"/>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img src="support/exif-orientation-9-u.jpg"/>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-computed-style.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-computed-style.html
new file mode 100644
index 00000000000..32933244c38
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-computed-style.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation:none computed style</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+    body {
+        overflow: hidden;
+        image-orientation: from-image;}
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+function run_tests() {
+    test(function() {
+        for (var i = 1; i <= 4; i++) {
+            var el = document.getElementById("img" + i);
+            var computedStyle = window.getComputedStyle(el);
+            assert_equals(computedStyle.width, "100px");
+            assert_equals(computedStyle.height, "50px");
+            assert_equals(computedStyle.imageOrientation, "from-image");
+        }
+        for (var i = 5; i <= 8; i++) {
+            var el = document.getElementById("img" + i);
+            var computedStyle = window.getComputedStyle(el);
+            assert_equals(computedStyle.width, "50px");
+            assert_equals(computedStyle.height, "100px");
+            assert_equals(computedStyle.imageOrientation, "from-image");
+        }
+        var el = document.getElementById("img9");
+        var computedStyle = window.getComputedStyle(el);
+        assert_equals(computedStyle.width, "100px");
+        assert_equals(computedStyle.height, "50px");
+        assert_equals(computedStyle.imageOrientation, "from-image");
+      }, "image-orientation:from-image computed style reports correct values");
+}
+</script>
+</head>
+<body onload="run_tests()">
+    <div><img id="img1" src="support/exif-orientation-1-ul.jpg"/></div>
+    <div><img id="img2" src="support/exif-orientation-2-ur.jpg"/></div>
+    <div><img id="img3" src="support/exif-orientation-3-lr.jpg"/></div>
+    <div><img id="img4" src="support/exif-orientation-4-lol.jpg"/></div>
+    <div><img id="img5" src="support/exif-orientation-5-lu.jpg"/></div>
+    <div><img id="img6" src="support/exif-orientation-6-ru.jpg"/></div>
+    <div><img id="img7" src="support/exif-orientation-7-rl.jpg"/></div>
+    <div><img id="img8" src="support/exif-orientation-8-llo.jpg"/></div>
+    <div><img id="img9" src="support/exif-orientation-9-u.jpg"/></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-content-images.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-content-images.html
new file mode 100644
index 00000000000..36a2a343168
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-content-images.html
@@ -0,0 +1,90 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image for content images</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-content-images-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    div.image {
+        display: inline-block;
+        border: 1px solid black;
+    }
+    div.container {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+        image-orientation: from-image;
+    }
+    img {
+        width: 100px;
+        height: 100px;
+        background-repeat: no-repeat;
+    }
+    body {
+        overflow: hidden;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-1-ul.jpg)"></div>
+        <br>Normal
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-2-ur.jpg)"></div>
+        <br>Flipped horizontally
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-3-lr.jpg)"></div>
+        <br>Rotated 180&deg;
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-4-lol.jpg)"></div>
+        <br>Flipped vertically
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-5-lu.jpg)"></div>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-6-ru.jpg)"></div>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-7-rl.jpg)"></div>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-8-llo.jpg)"></div>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <br>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-5-lu.jpg)"></img>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-6-ru.jpg)"></img>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-7-rl.jpg)"></img>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-8-llo.jpg)"></img>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-9-u.jpg)"></div>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html
new file mode 100644
index 00000000000..15e05884cf5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic1.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: change from image-orientation: none to from-image</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px solid black;
+        image-orientation: none;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+    function runTest() {
+        for (var i = 1; i <= 9; i++) {
+            document.getElementById("img" + i).style.imageOrientation = "from-image";
+        }
+    }
+</script>
+</head>
+<body onload="runTest()">
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div>
+        <img id="img1" src="support/exif-orientation-1-ul.jpg"/>
+        <br>Normal
+    </div>
+    <div>
+        <img id="img2" src="support/exif-orientation-2-ur.jpg"/>
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img id="img3" src="support/exif-orientation-3-lr.jpg"/>
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img id="img4" src="support/exif-orientation-4-lol.jpg"/>
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img id="img5" src="support/exif-orientation-5-lu.jpg"/>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img id="img6" src="support/exif-orientation-6-ru.jpg"/>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img id="img7" src="support/exif-orientation-7-rl.jpg"/>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img id="img8" src="support/exif-orientation-8-llo.jpg"/>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img id="img9" src="support/exif-orientation-9-u.jpg"/>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html
new file mode 100644
index 00000000000..c0df221337e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-dynamic2.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: change from image-orientation: from-image to none</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-none-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px solid black;
+        image-orientation: from-image;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+    function runTest() {
+        for (var i = 1; i <= 9; i++) {
+            document.getElementById("img" + i).style.imageOrientation = "none";
+        }
+    }
+</script>
+</head>
+<body onload="runTest()">
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div>
+        <img id="img1" src="support/exif-orientation-1-ul.jpg"/>
+    </div>
+    <div>
+        <img id="img2" src="support/exif-orientation-2-ur.jpg"/>
+    </div>
+    <div>
+        <img id="img3" src="support/exif-orientation-3-lr.jpg"/>
+    </div>
+    <div>
+        <img id="img4" src="support/exif-orientation-4-lol.jpg"/>
+    </div>
+    <div>
+        <img id="img5" src="support/exif-orientation-5-lu.jpg"/>
+    </div>
+    <div>
+        <img id="img6" src="support/exif-orientation-6-ru.jpg"/>
+    </div>
+    <div>
+        <img id="img7" src="support/exif-orientation-7-rl.jpg"/>
+    </div>
+    <div>
+        <img id="img8" src="support/exif-orientation-8-llo.jpg"/>
+    </div>
+    <div>
+        <img id="img9" src="support/exif-orientation-9-u.jpg"/>
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-image-document.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-image-document.html
new file mode 100644
index 00000000000..793fc017e6f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image-image-document.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image in image documents</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-image-document-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    iframe {
+        display: inline-block;
+        width: 120px;
+        height: 110px;
+        vertical-align: top;
+        border: 1px solid black;
+        image-orientation: from-image;
+         }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because image
+       documents always respect the orientation, regardless of the image-orientation
+       property.</p>
+    <iframe src="support/exif-orientation-1-ul.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-2-ur.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-3-lr.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-4-lol.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="support/exif-orientation-5-lu.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-6-ru.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-7-rl.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-8-llo.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="support/exif-orientation-9-u.jpg" frameborder=0></iframe>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image.html
new file mode 100644
index 00000000000..f1343e9f23f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-from-image.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-from-image-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+        image-orientation: from-image;
+    }
+    img {
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div>
+        <img src="support/exif-orientation-1-ul.jpg"/>
+        <br>Normal
+    </div>
+    <div>
+        <img src="support/exif-orientation-2-ur.jpg"/>
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img src="support/exif-orientation-3-lr.jpg"/>
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img src="support/exif-orientation-4-lol.jpg"/>
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-5-lu.jpg"/>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-6-ru.jpg"/>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img src="support/exif-orientation-7-rl.jpg"/>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img src="support/exif-orientation-8-llo.jpg"/>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img src="support/exif-orientation-9-u.jpg"/>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-computed-style.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-computed-style.html
new file mode 100644
index 00000000000..49919288b55
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-computed-style.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none computed style</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+    body {
+        overflow: hidden;
+        image-orientation: none;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+<script>
+function run_tests() {
+    test(function() {
+        for (var i = 1; i <= 9; i++) {
+            var el = document.getElementById("img" + i);
+            var computedStyle = window.getComputedStyle(el);
+            assert_equals(computedStyle.width, "100px");
+            assert_equals(computedStyle.height, "50px");
+            assert_equals(computedStyle.imageOrientation, "none");
+        }
+      }, "image-orientation:none computed style reports correct values");
+
+}
+</script>
+</head>
+<body onload="run_tests()">
+    <div><img id="img1" src="support/exif-orientation-1-ul.jpg"/></div>
+    <div><img id="img2" src="support/exif-orientation-2-ur.jpg"/></div>
+    <div><img id="img3" src="support/exif-orientation-3-lr.jpg"/></div>
+    <div><img id="img4" src="support/exif-orientation-4-lol.jpg"/></div>
+    <div><img id="img5" src="support/exif-orientation-5-lu.jpg"/></div>
+    <div><img id="img6" src="support/exif-orientation-6-ru.jpg"/></div>
+    <div><img id="img7" src="support/exif-orientation-7-rl.jpg"/></div>
+    <div><img id="img8" src="support/exif-orientation-8-llo.jpg"/></div>
+    <div><img id="img9" src="support/exif-orientation-9-u.jpg"/></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-content-images.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-content-images.html
new file mode 100644
index 00000000000..7bcb5ce3394
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-content-images.html
@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none for content images</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-none-content-images-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    div.image {
+        display: inline-block;
+        border: 1px solid black;
+    }
+    div.container {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+        image-orientation: none;
+    }
+    img {
+        width: 100px;
+        height: 100px;
+        background-repeat: no-repeat;
+    }
+    body {
+        overflow: hidden;
+    }
+</style>
+</head>
+<body>
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-2-ur.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-3-lr.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-4-lol.jpg)"></div>
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-5-lu.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-6-ru.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-7-rl.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-8-llo.jpg)"></div>
+    </div>
+    <br>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-5-lu.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-6-ru.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-7-rl.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(support/exif-orientation-8-llo.jpg)"></img>
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(support/exif-orientation-9-u.jpg)"></div>
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-image-document.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-image-document.html
new file mode 100644
index 00000000000..29ec30f1431
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-image-document.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none in image documents</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-none-image-document-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    iframe {
+        display: inline-block;
+        margin-right: 20px;
+        margin-bottom: 10px;
+        width: 120px;
+        height: 110px;
+        vertical-align: top;
+        border: 1px solid black;
+        image-orientation: none;
+     }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because image
+       documents always respect the orientation, regardless of the image-orientation
+       property.</p>
+    <iframe src="support/exif-orientation-1-ul.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-2-ur.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-3-lr.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-4-lol.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="support/exif-orientation-5-lu.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-6-ru.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-7-rl.jpg" frameborder=0></iframe>
+    <iframe src="support/exif-orientation-8-llo.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="support/exif-orientation-9-u.jpg" frameborder=0></iframe>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none.html
new file mode 100644
index 00000000000..03c46c620a0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<link rel="match" href="reference/image-orientation-none-ref.html">
+<meta name=fuzzy content="10;100">
+<style>
+    body {
+        overflow: hidden;
+        image-orientation: none;
+    }
+    img {
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div><img src="support/exif-orientation-1-ul.jpg"/></div>
+    <div><img src="support/exif-orientation-2-ur.jpg"/></div>
+    <div><img src="support/exif-orientation-3-lr.jpg"/></div>
+    <div><img src="support/exif-orientation-4-lol.jpg"/></div>
+    <div><img src="support/exif-orientation-5-lu.jpg"/></div>
+    <div><img src="support/exif-orientation-6-ru.jpg"/></div>
+    <div><img src="support/exif-orientation-7-rl.jpg"/></div>
+    <div><img src="support/exif-orientation-8-llo.jpg"/></div>
+    <div><img src="support/exif-orientation-9-u.jpg"/></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-default-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-default-ref.html
new file mode 100644
index 00000000000..aa8bede6014
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-default-ref.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>CSS Images Module Level 3: image-orientation: from-image</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px
+        solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       no image-orientation property is given.</p>
+    <div>
+        <img src="../support/exif-orientation-1-ul-pre-rotated.jpg">
+        <br>Normal
+    </div>
+    <div>
+        <img src="../support/exif-orientation-2-ur-pre-rotated.jpg">
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img src="../support/exif-orientation-3-lr-pre-rotated.jpg">
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img src="../support/exif-orientation-4-lol-pre-rotated.jpg">
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-5-lu-pre-rotated.jpg">
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-6-ru-pre-rotated.jpg">
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img src="../support/exif-orientation-7-rl-pre-rotated.jpg">
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-8-llo-pre-rotated.jpg">
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img src="../support/exif-orientation-9-u-pre-rotated.jpg">
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-content-images-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-content-images-ref.html
new file mode 100644
index 00000000000..21fed5fbb66
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-content-images-ref.html
@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>CSS Images Module Level 3: image-orientation: from-image for content images</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    div.image {
+        display: inline-block;
+        border: 1px solid black;
+    }
+    div.container {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+    img {
+        width: 100px;
+        height: 100px;
+        background-repeat: no-repeat;
+    }
+    body {
+        overflow: hidden;
+    }
+</style>
+</head>
+<body >
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.
+    </p>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul-pre-rotated.jpg)"></div>
+        <br>Normal
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-2-ur-pre-rotated.jpg)"></div>
+        <br>Flipped horizontally
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-3-lr-pre-rotated.jpg)"></div>
+        <br>Rotated 180&deg;
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-4-lol-pre-rotated.jpg)"></div>
+        <br>Flipped vertically
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-5-lu-pre-rotated.jpg)"></div>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-6-ru-pre-rotated.jpg)"></div>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-7-rl-pre-rotated.jpg)"></div>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-8-llo-pre-rotated.jpg)"></div>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <br>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-5-lu-pre-rotated.jpg)"></img>
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-6-ru-pre-rotated.jpg)"></img>
+        <br>Rotated 90&deg; CW
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-7-rl-pre-rotated.jpg)"></img>
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-8-llo-pre-rotated.jpg)"></img>
+        <br>Rotated 90&deg; CCW
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-9-u-pre-rotated.jpg)"></div>
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-image-document-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-image-document-ref.html
new file mode 100644
index 00000000000..d2c7e6916bc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-image-document-ref.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image in image documents</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    iframe {
+        display: inline-block;
+        width: 120px;
+        height: 110px;
+        vertical-align: top;
+        border: 1px solid black;
+         }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because image
+       documents always respect the orientation, regardless of the image-orientation
+       property.</p>
+    <iframe src="../support/exif-orientation-1-ul-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-2-ur-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-3-lr-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-4-lol-pre-rotated.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="../support/exif-orientation-5-lu-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-6-ru-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-7-rl-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-8-llo-pre-rotated.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="../support/exif-orientation-9-u-pre-rotated.jpg" frameborder=0></iframe>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html
new file mode 100644
index 00000000000..d731e837778
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-from-image-ref.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: from-image</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because
+       image-orientation: from-image is specified.</p>
+    <div>
+        <img src="../support/exif-orientation-1-ul-pre-rotated.jpg">
+        <br>Normal
+    </div>
+    <div>
+        <img src="../support/exif-orientation-2-ur-pre-rotated.jpg">
+        <br>Flipped horizontally
+    </div>
+    <div>
+        <img src="../support/exif-orientation-3-lr-pre-rotated.jpg">
+        <br>Rotated 180&deg;
+    </div>
+    <div>
+        <img src="../support/exif-orientation-4-lol-pre-rotated.jpg">
+        <br>Flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-5-lu-pre-rotated.jpg">
+        <br>Rotated 90&deg; CCW and flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-6-ru-pre-rotated.jpg">
+        <br>Rotated 90&deg; CW
+    </div>
+    <div>
+        <img src="../support/exif-orientation-7-rl-pre-rotated.jpg">
+        <br>Rotated 90&deg; CW and flipped vertically
+    </div>
+    <div>
+        <img src="../support/exif-orientation-8-llo-pre-rotated.jpg">
+        <br>Rotated 90&deg; CCW
+    </div>
+    <div>
+        <img src="../support/exif-orientation-9-u-pre-rotated.jpg">
+        <br>Undefined (invalid value)
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-content-images-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-content-images-ref.html
new file mode 100644
index 00000000000..d73c554f329
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-content-images-ref.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none for content images</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    div.image {
+        display: inline-block;
+        border: 1px solid black;
+    }
+    div.container {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+    img {
+        width: 100px;
+        height: 100px;
+        background-repeat: no-repeat;
+    }
+    body {
+        overflow: hidden;
+    }
+</style>
+</head>
+<body>
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+    <br>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-1-ul.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-1-ul.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-1-ul.jpg)"></img>
+    </div>
+    <div class="container">
+        <img style="background-image: url(../support/exif-orientation-1-ul.jpg)"></img>
+    </div>
+    <br>
+    <div class="container">
+        <div class="image" style="content: url(../support/exif-orientation-1-ul.jpg)"></div>
+    </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-image-document-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-image-document-ref.html
new file mode 100644
index 00000000000..db84d0e23cf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-image-document-ref.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none in image documents</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    iframe {
+        display: inline-block;
+        margin-right: 20px;
+        margin-bottom: 10px;
+        width: 120px;
+        height: 110px;
+        vertical-align: top;
+        border: 1px solid black;
+     }
+</style>
+</head>
+<body>
+    <p>The images should rotate respecting their EXIF orientation because image
+       documents always respect the orientation, regardless of the image-orientation
+       property.</p>
+    <iframe src="../support/exif-orientation-1-ul-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-2-ur-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-3-lr-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-4-lol-pre-rotated.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="../support/exif-orientation-5-lu-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-6-ru-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-7-rl-pre-rotated.jpg" frameborder=0></iframe>
+    <iframe src="../support/exif-orientation-8-llo-pre-rotated.jpg" frameborder=0></iframe>
+    <br>
+    <iframe src="../support/exif-orientation-9-u-pre-rotated.jpg" frameborder=0></iframe>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-ref.html
new file mode 100644
index 00000000000..8293d6e003d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-ref.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Images Module Level 3: image-orientation: none</title>
+<link rel="author" title="Stephen Chenney" href="mailto:schenney@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#propdef-image-orientation">
+<style>
+    body {
+        overflow: hidden;
+    }
+    img {
+        border: 1px solid black;
+    }
+    div {
+        display: inline-block;
+        width: 100px;
+        vertical-align: top;
+    }
+</style>
+</head>
+<body>
+    <p>The images should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified.</p>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+    <div><img src="../support/exif-orientation-1-ul.jpg"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-1-ul-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-1-ul-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-2-ur-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-2-ur-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-3-lr-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-3-lr-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-4-lol-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-4-lol-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-4-lol.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-4-lol.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-5-lu-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-5-lu-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-6-ru-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-6-ru-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-6-ru.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-6-ru.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-7-rl-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-7-rl-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-7-rl.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-7-rl.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-8-llo-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-8-llo-pre-rotated.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-8-llo.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-8-llo.jpg
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-9-u-pre-rotated.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-9-u-pre-rotated.jpg
new file mode 100644
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diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-9-u.jpg b/tests/wpt/web-platform-tests/css/css-images/image-orientation/support/exif-orientation-9-u.jpg
new file mode 100644
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diff --git a/tests/wpt/web-platform-tests/css/css-multicol/intrinsic-width-change-column-count.html b/tests/wpt/web-platform-tests/css/css-multicol/intrinsic-width-change-column-count.html
new file mode 100644
index 00000000000..30e7671e41c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/intrinsic-width-change-column-count.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://www.w3.org/TR/css-multicol-1/#pseudo-algorithm">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1037790">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="width:100px; background:red;">
+  <div id="container" style="columns:3; column-gap:0; column-fill:auto; width:fit-content; height:100px; background:green;">
+    <div style="width:25px; height:10px;"></div>
+  </div>
+</div>
+<script>
+  document.body.offsetTop;
+  container.style.columns = "4";
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017-ref.html
new file mode 100644
index 00000000000..9628123611d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017-ref.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Reference: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<style>
+img {
+  display: list-item;
+  list-style-type: "[marker]";
+}
+img.inside {
+  list-style-position: inside;
+}
+</style>
+<ol>
+  <img src="about:invalid" alt="alt" class="inside" />
+  <img src="about:invalid" alt="alt" />
+  <li value="3">item</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017.html
new file mode 100644
index 00000000000..267e519feee
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-017.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Test: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="match" href="marker-content-017-ref.html">
+<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
+<link rel="help" href="https://drafts.csswg.org/css-lists/#declaring-a-list-item">
+<meta name="assert" content="Checks that ::marker can be created inside a non-replaced <img>.">
+<style>
+img {
+  display: list-item;
+}
+img.inside {
+  list-style-position: inside;
+}
+img::marker {
+  content: '[marker]';
+}
+</style>
+<ol>
+  <img src="about:invalid" alt="alt" class="inside" />
+  <img src="about:invalid" alt="alt" />
+  <li>item</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018-ref.html
new file mode 100644
index 00000000000..8107d4297d7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018-ref.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Reference: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<style>
+ol {
+  float: left;
+  width: 100px;
+}
+.inside {
+  list-style-position: inside;
+}
+li:nth-child(1) { list-style-type: "1" }
+li:nth-child(2) { list-style-type: "1 " }
+li:nth-child(3) { list-style-type: "1  " }
+li:nth-child(4) { list-style-type: " 1" }
+li:nth-child(5) { list-style-type: "  1" }
+li:nth-child(6) { list-style-type: "  1  " }
+li:nth-child(7) { list-style-type: "1\9 2" }
+li:nth-child(8) { list-style-type: "1\a 2" }
+</style>
+<ol class="inside">
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+</ol>
+<ol class="inside">
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+</ol>
+<ol class="outside">
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+</ol>
+<ol class="outside">
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018.html
new file mode 100644
index 00000000000..0a4a73cd505
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-018.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Test: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="match" href="marker-content-018-ref.html">
+<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
+<link rel="help" href="https://drafts.csswg.org/css-text-3/#white-space-rules">
+<meta name="assert" content="Checks that the 'content' property of a ::marker doesn't affect white space.">
+<style>
+ol {
+  float: left;
+  width: 100px;
+}
+.inside {
+  list-style-position: inside;
+}
+li:nth-child(1)::marker { content: "1" }
+li:nth-child(2)::marker { content: "1 " }
+li:nth-child(3)::marker { content: "1  " }
+li:nth-child(4)::marker { content: " 1" }
+li:nth-child(5)::marker { content: "  1" }
+li:nth-child(6)::marker { content: "  1  " }
+li:nth-child(7)::marker { content: "1\9 2" }
+li:nth-child(8)::marker { content: "1\a 2" }
+</style>
+<ol class="inside">
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+</ol>
+<ol class="inside">
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+</ol>
+<ol class="outside">
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+  <li>item</li>
+</ol>
+<ol class="outside">
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+  <li> item</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-default-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-default-ref.html
index 3d106211219..be932213b0f 100644
--- a/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-default-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-default-ref.html
@@ -3,6 +3,7 @@
 <title>CSS Reftest Reference</title>
 <link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com" />
 <link rel="mismatch" href="marker-font-variant-numeric-normal-ref.html">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 @font-face {
   /* This font looks different with 'font-variant-numeric: tabular-nums' */
@@ -17,19 +18,13 @@ ol {
   list-style-position: inside;
   font-family: "Exo 2";
 }
-span {
-  display: inline-block;
-  vertical-align: top;
-}
-li:first-child::before {
-  content: '\200B'; /* zero-width space */
-}
 li:first-child::after {
-  content: '';
-  position: absolute;
-  height: 225px;
+  content: 'X X X X X X X X X';
+  display: inline-block;
+  font: 25px/1 Ahem;
+  vertical-align: top;
+  height: 0;
   width: 25px;
-  background: black;
 }
 </style>
 <ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-normal-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-normal-ref.html
index 45ab55d14b8..b730a24e55a 100644
--- a/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-normal-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-font-variant-numeric-normal-ref.html
@@ -3,6 +3,7 @@
 <title>CSS Reftest Reference</title>
 <link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com" />
 <link rel="mismatch" href="marker-font-variant-numeric-default-ref.html">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 @font-face {
   /* This font looks different with 'font-variant-numeric: tabular-nums' */
@@ -19,10 +20,10 @@ ol {
 }
 span {
   display: inline-block;
+  font: 25px/1 Ahem;
   vertical-align: top;
   width: 25px;
   height: 25px;
-  background: black;
 }
 </style>
 <ol>
diff --git a/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003-ref.html b/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003-ref.html
new file mode 100644
index 00000000000..ec00293d861
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003-ref.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>Bidirectional text inside ruby content box</title>
+<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
+<body dir="rtl" style="font-size: 64px">
+<ruby><div>אב12ג</div><rt><div>אabבג</div></ruby>
diff --git a/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003.html b/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003.html
new file mode 100644
index 00000000000..2510408ec22
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-ruby/ruby-bidi-003.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>Bidirectional text inside ruby content box</title>
+<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
+<link rel="help" href="https://drafts.csswg.org/css-ruby-1/#bidi">
+<link rel="match" href="ruby-bidi-003-ref.html">
+<body dir="rtl" style="font-size: 64px">
+<ruby>אב12ג<rt>אabבג</ruby>
diff --git a/tests/wpt/web-platform-tests/css/css-shadow-parts/style-sharing.html b/tests/wpt/web-platform-tests/css/css-shadow-parts/style-sharing.html
new file mode 100644
index 00000000000..4af1260b5e9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-shadow-parts/style-sharing.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<title>CSS Shadow Parts test: Parts don't incorrectly share style with other elements</title>
+<link rel="help" href="https://drafts.csswg.org/css-shadow-parts/">
+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
+<link rel="author" href="https://mozilla.org/" title="Mozilla">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>::part(part1) { color: green; }</style>
+<div id="host"></div>
+<script>
+"use strict";
+test(function() {
+  host.attachShadow({ mode: "open" }).innerHTML = `
+    <div></div>
+    <div part="part1"></div>
+  `;
+  assert_equals(
+    getComputedStyle(host.shadowRoot.querySelector("[part]")).color,
+    "rgb(0, 128, 0)",
+    "Part should be green",
+  );
+}, "Part in selected host does not incorrectly share style with non-part");
+</script>
diff --git a/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe-ref.html b/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe-ref.html
new file mode 100644
index 00000000000..98de2b68836
--- /dev/null
+++ b/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe-ref.html
@@ -0,0 +1,4 @@
+<!doctype html>
+<title>DOM Test Reference</title>
+<p>You should see the word PASS below.</p>
+<div>PASS</div>
diff --git a/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html b/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html
new file mode 100644
index 00000000000..612aed637df
--- /dev/null
+++ b/tests/wpt/web-platform-tests/dom/nodes/remove-from-shadow-host-and-adopt-into-iframe.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<html class="reftest-wait">
+  <head>
+    <title>Adopting a shadow host child into an iframe</title>
+    <link rel="help" href="https://dom.spec.whatwg.org/#concept-node-adopt">
+    <link rel="match" href="remove-from-shadow-host-and-adopt-into-iframe-ref.html">
+    <style>
+      iframe { border: 0; }
+    </style>
+    <script src="/common/reftest-wait.js"></script>
+    <script>
+      onload = () => {
+        const root = host.attachShadow({mode:"open"});
+        root.innerHTML = "<slot>";
+        // force a layout
+        host.offsetTop;
+        iframe.contentWindow.document.body.style.margin = 0;
+        iframe.contentWindow.document.body.appendChild(adopted);
+        host.remove();
+        takeScreenshot();
+      }
+    </script>
+  </head>
+  <body>
+    <p>You should see the word PASS below.</p>
+    <iframe id="iframe"></iframe>
+    <div id="host"><span id="adopted">PASS</span></div>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/fetch/h1-parsing/resources-with-0x00-in-header.window.js b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources-with-0x00-in-header.window.js
new file mode 100644
index 00000000000..f1afeeb740b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources-with-0x00-in-header.window.js
@@ -0,0 +1,31 @@
+async_test(t => {
+  const script = document.createElement("script");
+  t.add_cleanup(() => script.remove());
+  script.src = "resources/script-with-0x00-in-header.py";
+  script.onerror = t.step_func_done();
+  script.onload = t.unreached_func();
+  document.body.append(script);
+}, "Expect network error for script with 0x00 in a header");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  t.add_cleanup(() => frame.remove());
+  frame.src = "resources/document-with-0x00-in-header.py";
+  // If network errors result in load events for frames per
+  // https://github.com/whatwg/html/issues/125 and https://github.com/whatwg/html/issues/1230 this
+  // should be changed to use the load event instead.
+  t.step_timeout(() => {
+    assert_equals(frame.contentDocument, null);
+    t.done();
+  }, 1000);
+  document.body.append(frame);
+}, "Expect network error for frame navigation to resource with 0x00 in a header");
+
+async_test(t => {
+  const img = document.createElement("img");
+  t.add_cleanup(() => img.remove());
+  img.src = "resources/blue-with-0x00-in-a-header.asis";
+  img.onerror = t.step_func_done();
+  img.onload = t.unreached_func();
+  document.body.append(img);
+}, "Expect network error for image with 0x00 in a header");
diff --git a/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/README.md b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/README.md
new file mode 100644
index 00000000000..2175d274088
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/README.md
@@ -0,0 +1,6 @@
+`blue-with-0x00-in-a-header.asis` is a copy from `../../images/blue.png` with the following prepended using Control Pictures to signify actual newlines and 0x00:
+```
+HTTP/1.1 200 AN IMAGE␍␊
+Content-Type: image/png␍␊
+Custom: ␀␍␊␍␊
+```
diff --git a/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis
new file mode 100644
index 00000000000..102340a6313
Binary files /dev/null and b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis differ
diff --git a/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/document-with-0x00-in-header.py b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/document-with-0x00-in-header.py
new file mode 100644
index 00000000000..6e8db619591
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/document-with-0x00-in-header.py
@@ -0,0 +1,4 @@
+def main(request, response):
+    response.headers.set("Content-Type", "text/html")
+    response.headers.set("Custom", "\0")
+    return "<!doctype html><b>This is a document.</b>"
diff --git a/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/script-with-0x00-in-header.py b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/script-with-0x00-in-header.py
new file mode 100644
index 00000000000..f4a016a3698
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/h1-parsing/resources/script-with-0x00-in-header.py
@@ -0,0 +1,4 @@
+def main(request, response):
+    response.headers.set("Content-Type", "text/javascript")
+    response.headers.set("Custom", "\0")
+    return "var thisIsJavaScript = 0"
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html b/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html
new file mode 100644
index 00000000000..919a05ed2a2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/cross-origin-due-to-document-domain-only.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<title>Cross-origin due to document.domain</title>
+<meta charset=utf-8>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<iframe src=resources/cross-origin-due-to-document-domain-only-helper.html></iframe>
+<script>
+async_test(t => {
+  onload = t.step_func_done(() => {
+    const frame = document.querySelector("iframe");
+    const innerSelf = self[0];
+    const innerLocation = innerSelf.location;
+    const innerDocument = innerSelf.document;
+    assert_equals(innerLocation.host, location.host);
+    assert_true(innerSelf.expandosForever);
+    assert_true(innerLocation.expandosForever);
+    assert_equals(frame.contentWindow, innerSelf);
+    assert_equals(frame.contentDocument, innerDocument);
+    innerSelf.setDocumentDomain();
+    assert_throws("SecurityError", () => innerSelf.expandosForever);
+    assert_throws("SecurityError", () => innerLocation.expandosForever);
+    assert_throws("SecurityError", () => innerLocation.host);
+    assert_equals(innerSelf.parent, self);
+    assert_throws("SecurityError", () => innerSelf.frameElement);
+    assert_throws("SecurityError", () => innerLocation.reload());
+    assert_equals(frame.contentWindow, innerSelf);
+    assert_equals(frame.contentDocument, null);
+    // Cross-origin Document object obtained before it became cross-origin has no protections
+    assert_equals(innerDocument.URL, frame.src);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html b/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html
new file mode 100644
index 00000000000..10ac8ece0e1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/origin/cross-origin-objects/resources/cross-origin-due-to-document-domain-only-helper.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+<script>
+self.expandosForever = true
+self.location.expandosForever = true
+function setDocumentDomain() {
+  document.domain = document.domain
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute-ref.html b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute-ref.html
new file mode 100644
index 00000000000..f32472105d5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute-ref.html
@@ -0,0 +1,3 @@
+<!DOCTYPE html>
+<p>You should see a green rectangle below</p>
+<div style="width:100px;height:100px;background-color:green"></div>
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute.html b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute.html
new file mode 100644
index 00000000000..80acb9f3dcc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-link-element/link-type-attribute.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<link rel=match href=link-type-attribute-ref.html>
+<link rel="stylesheet" type="application/javascript" href="data:text/css,div { background-color: red !important; }">
+<link rel="stylesheet" type="ABCtext/css" href="data:text/css,div { background-color: red !important; }">
+<link rel="stylesheet" type="text/cssDEF" href="data:text/css,div { background-color: red !important; }">
+<link rel="stylesheet" type="text/invalid" href="data:text/css,div { background-color: red !important; }">
+<link rel="stylesheet" type="invalid" href="data:text/css,div { background-color: red !important; }">
+<p>You should see a green rectangle below</p>
+<div style="width:100px;height:100px;background-color:green"></div>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/constraints/support/validator.js b/tests/wpt/web-platform-tests/html/semantics/forms/constraints/support/validator.js
index 9b28b32309e..48c3a5b40e6 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/constraints/support/validator.js
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/constraints/support/validator.js
@@ -4,11 +4,8 @@ var validator = {
     var self = this;
     test(function() {
       self.pre_check(ctl, 'tooLong');
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
-        if (data.dirty)
-          self.set_dirty(ctl);
         if (data.expected)
           assert_true(
               ctl.validity.tooLong,
@@ -25,11 +22,8 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "tooShort");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
-        if (data.dirty)
-          self.set_dirty(ctl);
         if (data.expected)
           assert_true(
               ctl.validity.tooShort,
@@ -46,7 +40,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "patternMismatch");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -65,7 +58,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "valueMissing");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -84,7 +76,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "typeMismatch");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -103,7 +94,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "rangeOverflow");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -122,7 +112,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "rangeUnderflow");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -141,7 +130,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "stepMismatch");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -160,7 +148,6 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "badInput");
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected)
@@ -179,17 +166,24 @@ var validator = {
     var self = this;
     test(function () {
       self.pre_check(ctl, "customError");
-      ctl.setCustomValidity(data.conditions.message);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
         if (data.expected) {
           assert_true(
               ctl.validity.customError,
               'The validity.customError attribute should be true' + condStr);
-          assert_equals(
-              ctl.validationMessage, data.conditions.message,
-              'The validationMessage attribute should be \'' +
-                  data.conditions.message + '\'' + condStr);
+          // validationMessage returns the empty string if ctl is barred from
+          // constraint validation, which happens if ctl is disabled.
+          if (ctl.disabled) {
+            assert_equals(
+                ctl.validationMessage, '',
+                'The validationMessage attribute must be empty' + condStr);
+          } else {
+            assert_equals(
+                ctl.validationMessage, data.conditions.message,
+                'The validationMessage attribute should be \'' +
+                    data.conditions.message + '\'' + condStr);
+          }
         } else {
           assert_false(
               ctl.validity.customError,
@@ -205,11 +199,8 @@ var validator = {
   test_isValid: function(ctl, data) {
     var self = this;
     test(function () {
-      self.set_conditions(ctl, data.conditions);
       self.iterate_over(ctl, data).forEach(function(val) {
         const {ctl, data, condStr} = val;
-        if (data.dirty)
-          self.set_dirty(ctl);
         if (data.expected)
           assert_true(
               ctl.validity.valid,
@@ -352,7 +343,9 @@ var validator = {
       ctl.removeAttribute(item);
     });
     for (var attr in obj) {
-      if (attr === "checked" || obj[attr] || obj[attr] === "")
+      if (attr === "message")
+        ctl.setCustomValidity(obj[attr]);
+      else if (attr === "checked" || obj[attr] || obj[attr] === "")
         ctl[attr] = obj[attr];
     }
   },
@@ -398,12 +391,27 @@ var validator = {
   iterate_over: function(ctl, data) {
     // Iterate over normal, disabled, readonly, and both.
     var ctlDisabled = ctl.cloneNode(true);
+    this.set_conditions(ctlDisabled, data.conditions);
+    if (data.dirty)
+      this.set_dirty(ctlDisabled);
     ctlDisabled.disabled = true;
+
     var ctlReadonly = ctl.cloneNode(true);
+    this.set_conditions(ctlReadonly, data.conditions);
+    if (data.dirty)
+      this.set_dirty(ctlReadonly);
     ctlReadonly.readonly = true;
+
     var ctlBoth = ctl.cloneNode(true);
+    this.set_conditions(ctlBoth, data.conditions);
+    if (data.dirty)
+      this.set_dirty(ctlBoth);
     ctlBoth.disabled = true;
     ctlBoth.readonly = true;
+
+    ctl = ctl.cloneNode(true);
+    this.set_conditions(ctl, data.conditions);
+
     return [
       {ctl: ctl, data: data, condStr: '.'},
       {ctl: ctlDisabled, data: data, condStr: ', when control is disabled.'},
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPoints.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPoints.html.ini
index d97432ed39c..c7b3482c786 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPoints.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPoints.html.ini
@@ -1,5 +1,3 @@
 [multiTouchPoints.html]
-  disabled:
-    if product == "chrome" and os != "mac": https://github.com/web-platform-tests/wpt/issues/20838
   expected:
     if product == "firefox" or product == "safari" or product == "epiphany" or product == "webkit": ERROR
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseFirstPoint.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseFirstPoint.html.ini
index 3adcbe68856..68ccafcec2a 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseFirstPoint.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseFirstPoint.html.ini
@@ -1,5 +1,3 @@
 [multiTouchPointsReleaseFirstPoint.html]
-  disabled:
-    if product == "chrome": https://github.com/web-platform-tests/wpt/issues/20838
   expected:
     if product == "firefox" or product == "safari": ERROR
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseSecondPoint.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseSecondPoint.html.ini
index d01525b3cfa..5d714dd7773 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseSecondPoint.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsReleaseSecondPoint.html.ini
@@ -1,5 +1,3 @@
 [multiTouchPointsReleaseSecondPoint.html]
-  disabled:
-    if product == "chrome": https://github.com/web-platform-tests/wpt/issues/20838
   expected:
     if product == "firefox" or product == "safari": ERROR
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsTwoTouchStarts.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsTwoTouchStarts.html.ini
index a87d9f936fd..40626b8193e 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsTwoTouchStarts.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsTwoTouchStarts.html.ini
@@ -1,5 +1,3 @@
 [multiTouchPointsTwoTouchStarts.html]
-  disabled:
-    if product == "chrome" and os != "mac": https://github.com/web-platform-tests/wpt/issues/20838
-  expected:
-    if product == "firefox" or product == "safari": ERROR
+   expected:
+     if product == "firefox" or product == "safari": ERROR
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsWithPause.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsWithPause.html.ini
index fe1bf469f4f..4f1939a431a 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsWithPause.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/multiTouchPointsWithPause.html.ini
@@ -1,5 +1,3 @@
 [multiTouchPointsWithPause.html]
-  disabled:
-    if product == "chrome": https://github.com/web-platform-tests/wpt/issues/20838
   expected:
     if product == "firefox" or product == "safari": ERROR
diff --git a/tests/wpt/web-platform-tests/layout-instability/shift-into-viewport.html b/tests/wpt/web-platform-tests/layout-instability/shift-into-viewport.html
index 6ace93ad54c..61267a32648 100644
--- a/tests/wpt/web-platform-tests/layout-instability/shift-into-viewport.html
+++ b/tests/wpt/web-platform-tests/layout-instability/shift-into-viewport.html
@@ -4,7 +4,7 @@
 <style>
 
 body { margin: 0; }
-#j { position: relative; width: 600px; height: 200px; top: 600px; }
+#j { position: absolute; width: 600px; height: 200px; top: 100%; }
 
 </style>
 <div id='j'></div>
@@ -19,7 +19,9 @@ promise_test(async () => {
   // Wait for the initial render to complete.
   await waitForAnimationFrames(2);
 
-  document.querySelector("#j").style.top = "400px";
+  // Move div partially into viewport.
+  document.querySelector("#j").style.top =
+      document.documentElement.clientHeight - 200 + "px";
 
   // The element moves from outside the viewport to within the viewport, which
   // should generate a shift.
diff --git a/tests/wpt/web-platform-tests/layout-instability/shift-outside-viewport.html b/tests/wpt/web-platform-tests/layout-instability/shift-outside-viewport.html
index 49242913760..2d92835b889 100644
--- a/tests/wpt/web-platform-tests/layout-instability/shift-outside-viewport.html
+++ b/tests/wpt/web-platform-tests/layout-instability/shift-outside-viewport.html
@@ -4,7 +4,7 @@
 <style>
 
 body { margin: 0; }
-#j { position: relative; width: 600px; height: 200px; top: 600px; }
+#j { position: absolute; width: 600px; height: 200px; top: 100%; }
 
 </style>
 <div id='j'></div>
@@ -19,7 +19,9 @@ promise_test(async () => {
   // Wait for the initial render to complete.
   await waitForAnimationFrames(2);
 
-  document.querySelector("#j").style.top = "800px";
+  // Move div even further out of viewport.
+  document.querySelector("#j").style.top =
+      document.documentElement.clientHeight + 200 + "px";
 
   // Since the element moves entirely outside of the viewport, it shouldn't
   // generate a score.
diff --git a/tests/wpt/web-platform-tests/lint.whitelist b/tests/wpt/web-platform-tests/lint.whitelist
index d06f4c59bca..b5a8f806870 100644
--- a/tests/wpt/web-platform-tests/lint.whitelist
+++ b/tests/wpt/web-platform-tests/lint.whitelist
@@ -77,6 +77,7 @@ AHEM COPY: css/vendor-imports/mozilla/mozilla-central-reftests/*/Ahem.ttf
 # Intentional use of CRLF
 CR AT EOL: WebIDL/valid/idl/documentation-dos.widl
 CR AT EOL: cors/resources/cors-headers.asis
+CR AT EOL: fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis
 CR AT EOL: html/semantics/forms/the-textarea-element/multiline-placeholder-cr.html
 CR AT EOL: html/semantics/forms/the-textarea-element/multiline-placeholder-crlf.html
 CR AT EOL: html/semantics/forms/the-input-element/multiline-placeholder-cr.html
diff --git a/tests/wpt/web-platform-tests/native-file-system/resources/native-fs-test-helpers.js b/tests/wpt/web-platform-tests/native-file-system/resources/native-fs-test-helpers.js
index 5ad8c04724b..bcdfd484cf2 100644
--- a/tests/wpt/web-platform-tests/native-file-system/resources/native-fs-test-helpers.js
+++ b/tests/wpt/web-platform-tests/native-file-system/resources/native-fs-test-helpers.js
@@ -14,7 +14,7 @@ const directory_promise = (async () => {
 
   await window.test_driver.bless(
       'show a file picker.<br />Please select an empty directory');
-  const entries = await self.chooseFileSystemEntries({type: 'openDirectory'});
+  const entries = await self.chooseFileSystemEntries({type: 'open-directory'});
   assert_true(entries instanceof FileSystemHandle);
   assert_true(entries instanceof FileSystemDirectoryHandle);
   for await (const entry of entries.getEntries()) {
diff --git a/tests/wpt/web-platform-tests/native-file-system/resources/opaque-origin-sandbox.html b/tests/wpt/web-platform-tests/native-file-system/resources/opaque-origin-sandbox.html
index 937a6c385de..07301af1cfa 100644
--- a/tests/wpt/web-platform-tests/native-file-system/resources/opaque-origin-sandbox.html
+++ b/tests/wpt/web-platform-tests/native-file-system/resources/opaque-origin-sandbox.html
@@ -16,7 +16,7 @@
   }
 
   try {
-    window.chooseFileSystemEntries({ type: 'openDirectory' })
+    window.chooseFileSystemEntries({ type: 'open-directory' })
       .then(() => {
         post_message('chooseFileSystemEntries(): FULFILLED');
       }).catch(error => {
diff --git a/tests/wpt/web-platform-tests/portals/predecessor-fires-unload.html b/tests/wpt/web-platform-tests/portals/predecessor-fires-unload.html
new file mode 100644
index 00000000000..6512195eaf6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/portals/predecessor-fires-unload.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/open-blank-host.js"></script>
+<script>
+function nextEvent(target, type) {
+  return new Promise((resolve, reject) => target.addEventListener(type, e => resolve(e), {once: true}));
+}
+
+function timePasses(delay) {
+  return new Promise((resolve, reject) => step_timeout(() => resolve(), delay));
+}
+
+promise_test(async () => {
+  const w = await openBlankPortalHost();
+  try {
+    const portal = w.document.createElement('portal');
+    portal.src = new URL('resources/simple-portal.html', location.href);
+    w.document.body.appendChild(portal);
+    const pagehideFired = nextEvent(w, 'pagehide');
+    const unloadFired = nextEvent(w, 'unload');
+    await portal.activate();
+    assert_true((await pagehideFired) instanceof w.PageTransitionEvent);
+    assert_true((await unloadFired) instanceof w.Event);
+  } finally {
+    w.close();
+  }
+}, "pagehide and unload should fire if the predecessor is not adopted");
+
+promise_test(async () => {
+  localStorage.setItem('predecessor-fires-unload-events', '');
+  window.open('resources/predecessor-fires-unload-watch-unload.html', '_blank', 'noopener');
+  while (localStorage.getItem('predecessor-fires-unload-events') != 'pagehide unload') {
+    await timePasses(50);
+  }
+}, "pagehide and unload should fire if the predecessor is not adopted, even without a window/opener association");
+</script>
diff --git a/tests/wpt/web-platform-tests/portals/resources/predecessor-fires-unload-watch-unload.html b/tests/wpt/web-platform-tests/portals/resources/predecessor-fires-unload-watch-unload.html
new file mode 100644
index 00000000000..ada5a64967e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/portals/resources/predecessor-fires-unload-watch-unload.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<body>
+<script>
+function nextEvent(target, type) {
+  return new Promise((resolve, reject) => target.addEventListener(type, e => resolve(e), {once: true}));
+}
+
+onload = function() {
+  const portal = document.createElement('portal');
+  portal.src = new URL('simple-portal.html', location.href);
+  document.body.appendChild(portal);
+
+  let firedEvents = [];
+  for (let type of ['pagehide', 'unload']) {
+    nextEvent(window, type).then(() => {
+      firedEvents.push(type);
+      localStorage.setItem('predecessor-fires-unload-events', firedEvents.join(' '));
+    });
+  }
+
+  portal.activate();
+}
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js b/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
index a819a3b425b..b45ff20dbc4 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
@@ -228,7 +228,7 @@ class MockRuntime {
 
     this.framesOfReference = {};
 
-    this.input_sources_ = [];
+    this.input_sources_ = new Map();
     this.next_input_source_index_ = 1;
 
     let supportedModes = [];
@@ -421,7 +421,7 @@ class MockRuntime {
     this.next_input_source_index_++;
 
     let source = new MockXRInputSource(fakeInputSourceInit, index, this);
-    this.input_sources_.push(source);
+    this.input_sources_.set(index, source);
     return source;
   }
 
@@ -540,17 +540,13 @@ class MockRuntime {
 
   // These methods are intended to be used by MockXRInputSource only.
   addInputSource(source) {
-    let index = this.input_sources_.indexOf(source);
-    if (index == -1) {
-      this.input_sources_.push(source);
+    if(!this.input_sources_.has(source.source_id_)) {
+      this.input_sources_.set(source.source_id_, source);
     }
   }
 
   removeInputSource(source) {
-    let index = this.input_sources_.indexOf(source);
-    if (index >= 0) {
-      this.input_sources_.splice(index, 1);
-    }
+    this.input_sources_.delete(source.source_id_);
   }
 
   // Mojo function implementations.
@@ -561,7 +557,6 @@ class MockRuntime {
     this.send_mojo_space_reset_ = false;
     if (this.pose_) {
       this.pose_.poseIndex++;
-
     }
 
     // Setting the input_state to null tests a slightly different path than
@@ -569,10 +564,10 @@ class MockRuntime {
     // code always sends up an empty array, but it's also valid mojom to send
     // up a null array.
     let input_state = null;
-    if (this.input_sources_.length > 0) {
+    if (this.input_sources_.size > 0) {
       input_state = [];
-      for (let i = 0; i < this.input_sources_.length; i++) {
-        input_state.push(this.input_sources_[i].getInputSourceState());
+      for (let input_source of this.input_sources_.values()) {
+        input_state.push(input_source.getInputSourceState());
       }
     }
 
@@ -739,12 +734,14 @@ class MockXRInputSource {
   }
 
   setGripOrigin(transform, emulatedPosition = false) {
+    // grip_origin was renamed to mojo_from_input in mojo
     this.mojo_from_input_ = new gfx.mojom.Transform();
     this.mojo_from_input_.matrix = getMatrixFromTransform(transform);
     this.emulated_position_ = emulatedPosition;
   }
 
   clearGripOrigin() {
+    // grip_origin was renamed to mojo_from_input in mojo
     if (this.mojo_from_input_ != null) {
       this.mojo_from_input_ = null;
       this.emulated_position_ = false;
@@ -752,6 +749,7 @@ class MockXRInputSource {
   }
 
   setPointerOrigin(transform, emulatedPosition = false) {
+    // pointer_origin was renamed to input_from_pointer in mojo
     this.desc_dirty_ = true;
     this.input_from_pointer_ = new gfx.mojom.Transform();
     this.input_from_pointer_.matrix = getMatrixFromTransform(transform);
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
index f16cc14cead..8fcf66d64ed 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/testloader.py
@@ -5,7 +5,7 @@ from abc import ABCMeta, abstractmethod
 from six.moves.queue import Empty
 from collections import defaultdict, deque
 from multiprocessing import Queue
-from six import iteritems
+from six import ensure_binary, iteritems
 from six.moves import xrange
 
 from . import manifestinclude
@@ -51,7 +51,7 @@ class HashChunker(TestChunker):
     def __call__(self, manifest):
         chunk_index = self.chunk_number - 1
         for test_type, test_path, tests in manifest:
-            h = int(hashlib.md5(test_path).hexdigest(), 16)
+            h = int(hashlib.md5(ensure_binary(test_path)).hexdigest(), 16)
             if h % self.total_chunks == chunk_index:
                 yield test_type, test_path, tests
 
@@ -65,7 +65,7 @@ class DirectoryHashChunker(TestChunker):
     def __call__(self, manifest):
         chunk_index = self.chunk_number - 1
         for test_type, test_path, tests in manifest:
-            h = int(hashlib.md5(os.path.dirname(test_path)).hexdigest(), 16)
+            h = int(hashlib.md5(ensure_binary(os.path.dirname(test_path))).hexdigest(), 16)
             if h % self.total_chunks == chunk_index:
                 yield test_type, test_path, tests
 
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
index ca5118009cf..efc1a16a932 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/handlers.py
@@ -1,4 +1,7 @@
-import cgi
+try:
+    import html
+except ImportError:
+    import cgi as html
 import json
 import os
 import sys
@@ -76,7 +79,7 @@ class DirectoryHandler(object):
 <ul>
 %(items)s
 </ul>
-""" % {"path": cgi.escape(url_path),
+""" % {"path": html.escape(url_path),
        "items": "\n".join(self.list_items(url_path, path))}  # noqa: E122
 
     def list_items(self, base_path, path):
@@ -93,14 +96,14 @@ class DirectoryHandler(object):
             yield ("""<li class="dir"><a href="%(link)s">%(name)s</a></li>""" %
                    {"link": link, "name": ".."})
         for item in sorted(os.listdir(path)):
-            link = cgi.escape(quote(item))
+            link = html.escape(quote(item))
             if os.path.isdir(os.path.join(path, item)):
                 link += "/"
                 class_ = "dir"
             else:
                 class_ = "file"
             yield ("""<li class="%(class)s"><a href="%(link)s">%(name)s</a></li>""" %
-                   {"link": link, "name": cgi.escape(item), "class": class_})
+                   {"link": link, "name": html.escape(item), "class": class_})
 
 
 def wrap_pipeline(path, request, response):
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/pipes.py b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/pipes.py
index ceb34cc3f4f..e5d6e1c96db 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/pipes.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/pipes.py
@@ -1,4 +1,7 @@
-from cgi import escape
+try:
+    from html import escape
+except ImportError:
+    from cgi import escape
 from collections import deque
 import base64
 import gzip as gzip_module
diff --git a/tests/wpt/web-platform-tests/web-animations/timing-model/animations/reverse-running-animation.html b/tests/wpt/web-platform-tests/web-animations/timing-model/animations/reverse-running-animation.html
index c5179a72c9d..65f89b3e04c 100644
--- a/tests/wpt/web-platform-tests/web-animations/timing-model/animations/reverse-running-animation.html
+++ b/tests/wpt/web-platform-tests/web-animations/timing-model/animations/reverse-running-animation.html
@@ -5,6 +5,7 @@
 <title>reverse running animation</title>
 <link rel="match" href="reverse-running-animation-ref.html">
 <script src="/common/reftest-wait.js"></script>
+<script src="../../testcommon.js"></script>
 <style>
   #box, #overlay {
     /* Add a border to ensure that anti-aliasing does not leak blue pixels
@@ -44,24 +45,25 @@
   </p>
 </body>
 <script>
-  onload = function() {
+  onload = async function() {
     // Double rAF to ensure that we are not bogged down during initialization
     // and the compositor is ready.
-    requestAnimationFrame(() => {
-      requestAnimationFrame(() => {
-        const elem = document.getElementById('box');
-        const anim = elem.animate([
-            { transform: 'translateX(100px)' },
-            { transform: 'translateX(100px)' },
-            { transform: 'translateX(200px)' },
-            { transform: 'translateX(200px)' }
-          ], {
-            duration: 1000
-          });
-        setTimeout(() => {
+    waitForAnimationFrames(2).then(() => {
+      const elem = document.getElementById('box');
+      const anim = elem.animate([
+          { transform: 'translateX(100px)' },
+          { transform: 'translateX(100px)', offset: 0.49 },
+          { transform: 'translateX(200px)', offset: 0.51 },
+          { transform: 'translateX(200px)' }
+        ], {
+          duration: 10000,
+        });
+      anim.ready.then(() => {
+        anim.currentTime = 5000;
+        requestAnimationFrame(() => {
           anim.reverse();
-        }, 500);
-        takeScreenshotDelayed(900);
+          takeScreenshotDelayed(1000);
+        });
       });
     });
   };
diff --git a/tests/wpt/web-platform-tests/web-nfc/NDEFMessage_constructor.https.html b/tests/wpt/web-platform-tests/web-nfc/NDEFMessage_constructor.https.html
index 1c842f5c7b6..4e53828c310 100644
--- a/tests/wpt/web-platform-tests/web-nfc/NDEFMessage_constructor.https.html
+++ b/tests/wpt/web-platform-tests/web-nfc/NDEFMessage_constructor.https.html
@@ -12,10 +12,20 @@
   }, 'NDEFMessage constructor without init dict');
 
   test(() => {
-    const message = new NDEFMessage(null);
-    assert_equals(message.records.length, 0, 'empty records');
+    assert_throws(new TypeError, () => new NDEFMessage(null),
+        'NDEFMessageInit#records is a required field.');
   }, 'NDEFMessage constructor with null init dict');
 
+  test(() => {
+    assert_throws(new TypeError, () => new NDEFMessage({dummy_key: 'dummy_value'}),
+        'NDEFMessageInit#records is a required field.');
+  }, 'NDEFMessage constructor without NDEFMessageInit#records field');
+
+  test(() => {
+    assert_throws(new TypeError, () => new NDEFMessage({records: []}),
+        'NDEFMessageInit#records should not be empty.');
+  }, 'NDEFMessage constructor with NDEFMessageInit#records being empty');
+
   test(() => {
     const message = new NDEFMessage(
         createMessage([createTextRecord(test_text_data)]));
diff --git a/tests/wpt/web-platform-tests/web-nfc/NDEFReadingEvent_constructor.https.html b/tests/wpt/web-platform-tests/web-nfc/NDEFReadingEvent_constructor.https.html
index cc56f8a18bd..5427b75ae2b 100644
--- a/tests/wpt/web-platform-tests/web-nfc/NDEFReadingEvent_constructor.https.html
+++ b/tests/wpt/web-platform-tests/web-nfc/NDEFReadingEvent_constructor.https.html
@@ -11,6 +11,12 @@
     assert_throws(new TypeError, () => new NDEFReadingEvent('message'));
   }, 'NDEFReadingEvent constructor without init dict');
 
+  test(() => {
+    assert_throws(new TypeError, () => new NDEFReadingEvent('type',
+          {serialNumber: '', message: null}),
+        'NDEFMessageInit#records is a required field.');
+  }, 'NDEFReadingEvent constructor failed to construct its NDEFMessage');
+
   test(() => {
     const message = createMessage([createMimeRecordFromJson(test_buffer_data)]);
     const event = new NDEFReadingEvent('type', {serialNumber: null, message: message});
@@ -23,11 +29,6 @@
     assert_equals(event.serialNumber, '', 'serialNumber');
   }, 'NDEFReadingEvent constructor with serialNumber not present');
 
-  test(() => {
-    const event = new NDEFReadingEvent('type', {serialNumber: '', message: null});
-    assert_equals(0, event.message.records.length, 'no records');
-  }, 'NDEFReadingEvent constructor with null message');
-
   test(() => {
     const message = createMessage([createMimeRecord(test_buffer_data)]);
     const event = new NDEFReadingEvent('type', {serialNumber: '', message: message});
diff --git a/tests/wpt/web-platform-tests/web-nfc/NDEFRecord_constructor.https.html b/tests/wpt/web-platform-tests/web-nfc/NDEFRecord_constructor.https.html
index c62ea7b0d62..2da7ca91078 100644
--- a/tests/wpt/web-platform-tests/web-nfc/NDEFRecord_constructor.https.html
+++ b/tests/wpt/web-platform-tests/web-nfc/NDEFRecord_constructor.https.html
@@ -13,9 +13,14 @@
 
   test(() => {
     assert_throws(new TypeError, () => new NDEFRecord(null),
-        'The record has neither type nor data.');
+        'NDEFRecordInit#recordType is a required field.');
   }, 'NDEFRecord constructor with null init dict');
 
+  test(() => {
+    assert_throws(new TypeError, () => new NDEFRecord({id: test_record_id, data: test_text_data}),
+        'NDEFRecordInit#recordType is a required field.');
+  }, 'NDEFRecord constructor without NDEFRecordInit#recordType field');
+
   test(() => {
     assert_throws(new TypeError, () => new NDEFRecord(
           createRecord('empty', test_text_data, test_record_id)),
diff --git a/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html b/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
index 1bdbf0bb50b..4ff0af8fb0b 100644
--- a/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
+++ b/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
@@ -386,20 +386,6 @@ nfc_test(async (t, mockNFC) => {
   });
 }, "NDEFWriter.push should replace all previously configured push operations.");
 
-nfc_test(async (t, mockNFC) => {
-  const writer = new NDEFWriter();
-  await writer.push({ records: [{ data: test_text_data}] });
-  assertNDEFMessagesEqual(test_text_data, mockNFC.pushedMessage());
-}, "Test that recordType should be set to 'text' if NDEFRecordInit.record's \
-recordType is undefined and NDEFRecordInit.record's data is DOMString.");
-
-nfc_test(async (t, mockNFC) => {
-  const writer = new NDEFWriter();
-  await writer.push({ records: [{ data: test_buffer_data}] });
-  assertNDEFMessagesEqual(test_buffer_data, mockNFC.pushedMessage());
-}, "Test that recordType should be set to 'mime' if NDEFRecordInit.record's \
-recordType is undefined and NDEFRecordInit.record's data is not DOMString.");
-
 nfc_test(async (t, mockNFC) => {
   const writer = new NDEFWriter();
   await writer.push({ records: [{ recordType: "mime", data: test_buffer_data }] });
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html b/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html
new file mode 100644
index 00000000000..9f43dc93c5b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html
@@ -0,0 +1,75 @@
+<!doctype html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>RTCDataChannel.prototype.close</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="RTCPeerConnection-helper.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  let pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  let [channel1, channel2] = await createDataChannelPair(pc1);
+  let close_handler = new Promise(resolve => {
+    channel2.onclose = event => {
+      resolve();
+    };
+  });
+  channel2.addEventListener('error', t.unreached_func());
+  channel1.close();
+  await close_handler;
+}, 'Close datachannel causes onclose to be called');
+
+promise_test(async t => {
+  // This is the same test as above, but using addEventListener
+  // rather than the "onclose" attribute.
+  let pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  let [channel1, channel2] = await createDataChannelPair(pc1);
+  let close_handler = new Promise(resolve => {
+    channel2.addEventListener('close', event => {
+      resolve();
+    });
+  });
+  channel2.addEventListener('error', t.unreached_func());
+  channel1.close();
+  await close_handler;
+}, 'Close datachannel causes close event to be called');
+
+promise_test(async t => {
+  let pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  let [channel1, channel2] = await createDataChannelPair(pc1);
+  let events = [];
+  let error = null;
+  let close_handler = new Promise(resolve => {
+    channel2.addEventListener('close', event => {
+      events.push('close');
+      resolve();
+    });
+  });
+  let error_handler = new Promise((resolve, reject) => {
+    channel2.addEventListener('error', event => {
+      events.push('error');
+      try {
+        assert_true(event instanceof RTCErrorEvent);
+        error = event.error;
+      } catch (e) {
+        // Prevent test from hanging when an assert in the error handler fails.
+        reject('Error event wrong: ' + e);
+      }
+      resolve();
+    });
+  });
+  pc1.close();
+  await error_handler;
+  await close_handler;
+  // Error should fire before close.
+  assert_array_equals(['error', 'close'], events);
+  assert_true(error instanceof RTCError);
+  assert_equals(error.name, 'OperationError');
+}, 'Close peerconnection causes close event and error to be called');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCError.html b/tests/wpt/web-platform-tests/webrtc/RTCError.html
index 4d0726093c1..9c7227521ed 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCError.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCError.html
@@ -35,8 +35,8 @@ test(() => {
 
 test(() => {
   const error = new RTCError({errorDetail:'data-channel-failure'}, 'message');
-  assert_equals(error.name, 'RTCError');
-}, 'RTCError.name is \'RTCError\'');
+  assert_equals(error.name, 'OperationError');
+}, 'RTCError.name is \'OperationError\'');
 
 test(() => {
   const error = new RTCError({errorDetail:'data-channel-failure'}, 'message');
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-close.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-close.html
new file mode 100644
index 00000000000..74f816bf3fc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-close.html
@@ -0,0 +1,18 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>RTCPeerConnection.prototype.close</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+'use strict';
+
+  promise_test(async t => {
+    const pc = new RTCPeerConnection();
+    t.add_cleanup(() => pc.close());
+
+    pc.onsignalingstatechange = t.unreached_func();
+    pc.close();
+    assert_true(pc.signalingState === 'closed');
+    await new Promise(r => t.step_timeout(r, 100));
+  }, 'RTCPeerConnection.close() does not fire signalingstatechange event.');
+</script>
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-connectionState.https.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-connectionState.https.html
index 9ed5808727a..a054a1e8ccc 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-connectionState.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-connectionState.https.html
@@ -270,4 +270,22 @@
 
     assert_array_equals(states, ['connecting', 'connected']);
   }, 'connectionState transitions to connected via connecting');
+
+  promise_test(async t => {
+    const pc1 = new RTCPeerConnection();
+    t.add_cleanup(() => pc1.close());
+    const pc2 = new RTCPeerConnection();
+    const stream = await getNoiseStream({ audio: true });
+    t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+
+    stream.getTracks().forEach(track => pc1.addTrack(track, stream));
+    exchangeIceCandidates(pc1, pc2);
+    doSignalingHandshake(pc1, pc2);
+    await listenToIceConnected(pc2);
+
+    pc2.onconnectionstatechange = t.unreached_func();
+    pc2.close();
+    assert_true(pc2.connectionState === 'closed');
+    await new Promise(r => t.step_timeout(r, 100));
+  }, 'Closing a PeerConnection should not fire connectionstatechange event');
 </script>
diff --git a/tests/wpt/web-platform-tests/webxr/resources/webxr_test_asserts.js b/tests/wpt/web-platform-tests/webxr/resources/webxr_test_asserts.js
index 863b9945724..38f1364ce03 100644
--- a/tests/wpt/web-platform-tests/webxr/resources/webxr_test_asserts.js
+++ b/tests/wpt/web-platform-tests/webxr/resources/webxr_test_asserts.js
@@ -5,7 +5,7 @@
 // |p1|, |p2| - objects with x, y, z, w components that are floating point numbers
 // |epsilon| - float specifying precision
 // |prefix| - string used as a prefix for logging
-let assert_point_approx_equals = function(p1, p2, epsilon = FLOAT_EPSILON, prefix = "") {
+const assert_point_approx_equals = function(p1, p2, epsilon = FLOAT_EPSILON, prefix = "") {
   if (p1 == null && p2 == null) {
     return;
   }
@@ -33,7 +33,7 @@ let assert_point_approx_equals = function(p1, p2, epsilon = FLOAT_EPSILON, prefi
 // |p1|, |p2| - objects with x, y, z, w components that are floating point numbers
 // |epsilon| - float specifying precision
 // |prefix| - string used as a prefix for logging
-let assert_point_significantly_not_equals = function(p1, p2, epsilon = FLOAT_EPSILON, prefix = "") {
+const assert_point_significantly_not_equals = function(p1, p2, epsilon = FLOAT_EPSILON, prefix = "") {
 
   assert_not_equals(p1, null, prefix + "p1 must be non-null");
   assert_not_equals(p2, null, prefix + "p2 must be non-null");
@@ -55,10 +55,25 @@ let assert_point_significantly_not_equals = function(p1, p2, epsilon = FLOAT_EPS
   }
 };
 
+// |t1|, |t2| - objects containing position and orientation.
+// |epsilon| - float specifying precision
+// |prefix| - string used as a prefix for logging
+const assert_transform_approx_equals = function(t1, t2, epsilon = FLOAT_EPSILON, prefix = "") {
+  if (t1 == null && t2 == null) {
+    return;
+  }
+
+  assert_not_equals(t1, null, prefix + "t1 must be non-null");
+  assert_not_equals(t2, null, prefix + "t2 must be non-null");
+
+  assert_point_approx_equals(t1.position, t2.position, epsilon, prefix + "positions must be equal");
+  assert_point_approx_equals(t1.orientation, t2.orientation, epsilon, prefix + "orientations must be equal");
+};
+
 // |m1|, |m2| - arrays of floating point numbers
 // |epsilon| - float specifying precision
 // |prefix| - string used as a prefix for logging
-let assert_matrix_approx_equals = function(m1, m2, epsilon = FLOAT_EPSILON, prefix = "") {
+const assert_matrix_approx_equals = function(m1, m2, epsilon = FLOAT_EPSILON, prefix = "") {
   if (m1 == null && m2 == null) {
     return;
   }
@@ -89,13 +104,12 @@ let assert_matrix_approx_equals = function(m1, m2, epsilon = FLOAT_EPSILON, pref
         m1[mismatched_element], m2[mismatched_element], epsilon,
         error_message);
   }
-}
-
+};
 
 // |m1|, |m2| - arrays of floating point numbers
 // |epsilon| - float specifying precision
 // |prefix| - string used as a prefix for logging
-let assert_matrix_significantly_not_equals = function(m1, m2, epsilon = FLOAT_EPSILON, prefix = "") {
+const assert_matrix_significantly_not_equals = function(m1, m2, epsilon = FLOAT_EPSILON, prefix = "") {
   if (m1 == null && m2 == null) {
     return;
   }
@@ -133,13 +147,13 @@ let assert_matrix_significantly_not_equals = function(m1, m2, epsilon = FLOAT_EP
 
     assert_unreached(error_message);
   }
-}
+};
 
 // |r1|, |r2| - XRRay objects
 // |epsilon| - float specifying precision
 // |prefix| - string used as a prefix for logging
-let assert_ray_approx_equals = function(r1, r2, epsilon = FLOAT_EPSILON, prefix = "") {
+const assert_ray_approx_equals = function(r1, r2, epsilon = FLOAT_EPSILON, prefix = "") {
   assert_point_approx_equals(r1.origin, r2.origin, epsilon, prefix + "origin:");
   assert_point_approx_equals(r1.direction, r2.direction, epsilon, prefix + "direction:");
   assert_matrix_approx_equals(r1.matrix, r2.matrix, epsilon, prefix + "matrix:");
-}
+};
diff --git a/tests/wpt/web-platform-tests/webxr/resources/webxr_test_constants_fake_world.js b/tests/wpt/web-platform-tests/webxr/resources/webxr_test_constants_fake_world.js
new file mode 100644
index 00000000000..0601f54fce9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webxr/resources/webxr_test_constants_fake_world.js
@@ -0,0 +1,75 @@
+'use strict';
+
+// This file introduces constants used to mock fake world for the purposes of hit test.
+
+// Generates FakeXRWorldInit dictionary with given dimensions.
+// The generated fake world will have floor and front wall treated as planes,
+// side walls treated as meshes, and ceiling treated as points.
+// width - X axis, in meters
+// height - Y axis, in meters
+// length - Z axis, in meters
+function createFakeWorld(width, height, length) {
+  // Vertices:
+  const BOTTOM_LEFT_FRONT = { x: -width/2, y: 0, z: -length/2, w: 1};
+  const BOTTOM_RIGHT_FRONT = { x: width/2, y: 0, z: -length/2, w: 1};
+
+  const TOP_LEFT_FRONT = { x: -width/2, y: height, z: -length/2, w: 1};
+  const TOP_RIGHT_FRONT = { x: width/2, y: height, z: -length/2, w: 1};
+
+  const BOTTOM_LEFT_BACK = { x: -width/2, y: 0, z: length/2, w: 1};
+  const BOTTOM_RIGHT_BACK = { x: width/2, y: 0, z: length/2, w: 1};
+
+  const TOP_LEFT_BACK = { x: -width/2, y: height, z: length/2, w: 1};
+  const TOP_RIGHT_BACK = { x: width/2, y: height, z: length/2, w: 1};
+
+  // Faces:
+  const FRONT_WALL_AND_FLOOR_FACES = [
+    // Front wall:
+    [BOTTOM_LEFT_FRONT, BOTTOM_RIGHT_FRONT, TOP_RIGHT_FRONT],
+    [BOTTOM_LEFT_FRONT, TOP_RIGHT_FRONT, TOP_LEFT_FRONT],
+    // Floor:
+    [BOTTOM_LEFT_FRONT, BOTTOM_RIGHT_FRONT, BOTTOM_RIGHT_BACK],
+    [BOTTOM_LEFT_FRONT, BOTTOM_LEFT_BACK, BOTTOM_RIGHT_BACK],
+  ];
+
+  const CEILING_FACES = [
+    // Ceiling:
+    [TOP_LEFT_FRONT, TOP_RIGHT_FRONT, TOP_RIGHT_BACK],
+    [TOP_LEFT_FRONT, TOP_LEFT_BACK, TOP_RIGHT_BACK],
+  ];
+
+  const SIDE_WALLS_FACES = [
+    // Left:
+    [BOTTOM_LEFT_FRONT, TOP_LEFT_FRONT, TOP_LEFT_BACK],
+    [BOTTOM_LEFT_FRONT, BOTTOM_LEFT_BACK, TOP_LEFT_BACK],
+    // Right:
+    [BOTTOM_RIGHT_FRONT, TOP_RIGHT_FRONT, TOP_RIGHT_BACK],
+    [BOTTOM_RIGHT_FRONT, BOTTOM_RIGHT_BACK, TOP_RIGHT_BACK],
+  ];
+
+  // Regions:
+  const FRONT_WALL_AND_FLOOR_REGION = {
+    type: "plane",
+    faces: FRONT_WALL_AND_FLOOR_FACES,
+  };
+
+  const SIDE_WALLS_REGION = {
+    type: "mesh",
+    faces: SIDE_WALLS_FACES,
+  };
+
+  const CEILING_REGION = {
+    type: "point",
+    faces: CEILING_FACES,
+  };
+
+  return {
+    hitTestRegions : [
+      FRONT_WALL_AND_FLOOR_REGION,
+      SIDE_WALLS_REGION,
+      CEILING_REGION,
+    ]
+  };
+}
+
+const VALID_FAKE_WORLD = createFakeWorld(5.0, 2.0, 5.0);
diff --git a/tests/wpt/web-platform-tests/webxr/xrRigidTransform_inverse.https.html b/tests/wpt/web-platform-tests/webxr/xrRigidTransform_inverse.https.html
index a314f6b55a2..3098fb64936 100644
--- a/tests/wpt/web-platform-tests/webxr/xrRigidTransform_inverse.https.html
+++ b/tests/wpt/web-platform-tests/webxr/xrRigidTransform_inverse.https.html
@@ -3,6 +3,7 @@
 <script src="/resources/testharnessreport.js"></script>
 <script src="resources/webxr_util.js"></script>
 <script src="resources/webxr_test_constants.js"></script>
+<script src="resources/webxr_test_asserts.js"></script>
 <canvas id="webgl-canvas"></canvas>
 <script>
 
@@ -12,18 +13,6 @@ let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;
 let testFunction =
   (session, fakeDeviceController, t) => new Promise((resolve, reject) => {
 
-  function assert_point_approx_equals(a, b) {
-    assert_approx_equals(a.x, b.x, FLOAT_EPSILON);
-    assert_approx_equals(a.y, b.y, FLOAT_EPSILON);
-    assert_approx_equals(a.z, b.z, FLOAT_EPSILON);
-    assert_approx_equals(a.w, b.w, FLOAT_EPSILON);
-  };
-
-  function assert_transform_approx_equals(a, b) {
-    assert_point_approx_equals(a.position, b.position);
-    assert_point_approx_equals(a.orientation, b.orientation);
-  };
-
   // An identity transform should be equal to it's inverse.
   let identity_transform = new XRRigidTransform();
   t.step(() => {
diff --git a/tests/wpt/web-platform-tests/xhr/resources/parse-headers.py b/tests/wpt/web-platform-tests/xhr/resources/parse-headers.py
index fdc626539e8..c661f22c3e9 100644
--- a/tests/wpt/web-platform-tests/xhr/resources/parse-headers.py
+++ b/tests/wpt/web-platform-tests/xhr/resources/parse-headers.py
@@ -1,10 +1,6 @@
-import json
-
 def main(request, response):
-
     content = ""
     if "my-custom-header" in request.GET:
         val = request.GET.first("my-custom-header")
         response.headers.set("My-Custom-Header", val)
-
     return content