From 2497cbf4c7dae48207dc30e364c0e500dc7dc007 Mon Sep 17 00:00:00 2001
From: WPT Sync Bot <josh+wptsync@joshmatthews.net>
Date: Fri, 24 Feb 2023 01:42:43 +0000
Subject: [PATCH] Update web-platform-tests to revision
 b'1ba5cfed0836d1f7ea78b115ef6d9c7ed767b8b9'

---
 .../url/url-in-tags-revoke.window.js.ini      |    2 +-
 tests/wpt/metadata/MANIFEST.json              | 1617 ++++++++++++++---
 .../CSS2/floats/hit-test-floats-001.html.ini  |    3 +
 .../inline-negative-margin-001.html.ini       |    5 +-
 .../hit-test-anonymous-block.html.ini         |    3 +
 .../absolute-replaced-width-036.xht.ini       |    2 +
 .../sample-on-last-keyframe.html.ini          |    3 +
 .../at-font-face-font-matching.html.ini       |    1 -
 .../image-set/image-set-parsing.html.ini      |   66 +
 ...reak-transformation-unremovable-2.html.ini |    2 -
 ...reak-transformation-unremovable-3.html.ini |    2 -
 .../trailing-space-position-001.html.ini      |    3 -
 .../properties-value-001.html.ini             |    1 -
 .../properties-value-002.html.ini             |    1 -
 .../properties-value-inherit-001.html.ini     |    1 -
 .../properties-value-inherit-002.html.ini     |  151 +-
 .../css/cssom-view/CaretPosition-001.html.ini |    3 -
 .../cssom-view/elementFromPoint-001.html.ini  |    3 -
 .../elementFromPoint-float-in-table.html.ini  |    3 +
 .../elementFromPoint-list-001.html.ini        |    3 -
 ...omPoint-visibility-hidden-resizer.html.ini |    3 -
 .../elementsFromPoint-iframes.html.ini        |    3 +
 ...non-matching-lazy-load.tentative.html.ini} |    2 +-
 .../overflow-media-features.html.ini          |   45 +
 .../mediaqueries/test_media_queries.html.ini  |    6 +
 ...th-last-child-containing-ancestor.html.ini |    2 +
 .../nth-last-child-in-shadow-root.html.ini    |    2 +
 .../nth-last-child-of-attr.html.ini           |    2 +
 .../nth-last-child-of-class.html.ini          |    2 +
 .../nth-last-child-of-has.html.ini            |    2 +
 .../nth-last-child-of-in-ancestor.html.ini    |    2 +
 .../nth-last-child-of-sibling.html.ini        |    2 +
 ...-last-child-when-ancestor-changes.html.ini |    2 +
 ...h-last-child-when-sibling-changes.html.ini |    2 +
 .../nodes/Node-lookupNamespaceURI.html.ini    |   18 +
 .../css-images.sub.tentative.html.ini         |    5 +-
 ...ared-worker-blob-fetch.https.window.js.ini |   43 +
 .../shared-worker-blob-fetch.window.js.ini    |   46 +
 ...n-fragment-scrolling-cross-origin.html.ini |    2 +-
 ...c-aboutblank-navigate-immediately.html.ini |    3 +-
 ...eshow-events-iframe-contentWindow.html.ini |    3 -
 .../load-pageshow-events-window-open.html.ini |    3 -
 ...tion-unload-cross-origin.sub.window.js.ini |    3 -
 ...avigation-unload-same-origin.window.js.ini |    3 -
 .../pageload-image-in-popup.html.ini          |    3 +-
 .../traverse-during-unload.html.ini           |    4 +
 .../layers/2d.layer.restore-style.html.ini    |    2 +
 .../layers/layers-restorestyle.html.ini       |    2 -
 .../layers/2d.layer.endlayer.alone.html.ini   |    2 +
 .../layers/2d.layer.endlayer.alone.w.html.ini |    2 +
 .../2d.layer.endlayer.unmatched.html.ini      |    2 +
 .../2d.layer.endlayer.unmatched.w.html.ini    |    2 +
 ....global-states.no_global_states.w.html.ini |    2 +
 .../layers/2d.layer.nested.w.html.ini         |    2 +
 .../layers/2d.layer.restore-style.html.ini    |    2 +
 .../layers/2d.layer.restore-style.w.html.ini  |    2 +
 .../layers/2d.layer.several-complex.html.ini  |    2 +
 .../2d.layer.several-complex.w.html.ini       |    2 +
 .../supported-elements.html.ini               |    4 +-
 .../update-the-rendering.html.ini             |    3 +-
 ...a-does-not-block-render.tentative.html.ini |    3 +
 .../iframe_sandbox_popups_escaping-3.html.ini |    3 +-
 ...rame_sandbox_popups_nonescaping-2.html.ini |    4 +-
 .../non-active-document.html.ini              |    6 +
 .../textfieldselection/select-event.html.ini  |    3 -
 .../htmlanchorelement_noopener.html.ini       |    3 +-
 .../module-tla-delayed.html.ini               |    3 +
 ...le-event-handler-settings-objects.html.ini |    3 -
 .../promise-rejection-events.html.ini         |    3 +-
 .../url/url-setters-a-area.window.js.ini      |    6 +
 tests/wpt/metadata/url/url-setters.any.js.ini |    6 +
 .../url/urlsearchparams-size.any.js.ini       |   26 +
 .../wasm/jsapi/functions/entry.html.ini       |    3 +-
 .../017.html.ini                              |    0
 .../018.html.ini                              |    0
 ...s-3P-window.partitioned.tentative.html.ini |    4 -
 .../mozilla/task_queue_throttling.any.js.ini  |    6 -
 .../security-features/resources/common.sub.js |   20 +-
 .../subresource/static-import.py              |   48 +-
 .../generic/test-case.sub.js                  |    9 +-
 .../cookies/resources/set-cookie.py           |    6 +
 .../sample-on-last-keyframe.html              |   36 +
 .../css/css-animations/support/testcommon.js  |   12 -
 ...ckground-gradient-subpixel-fills-area.html |    1 +
 .../background-size-cover-003.html            |    1 +
 .../background-size-cover-svg.html            |    1 +
 .../hidpi/simple-bg-color-ref.html            |    2 +-
 .../flex-item-content-overflow-001-ref.html   |   43 +
 .../flex-item-content-overflow-001a.html      |   46 +
 .../flex-item-content-overflow-001b.html      |   43 +
 .../flex-item-content-overflow-002a.html      |   48 +
 .../flex-item-content-overflow-002b.html      |   45 +
 .../css/css-cascade/at-scope-parsing.html     |    3 +-
 .../css/css-cascade/scope-evaluation.html     |   61 +-
 .../css/css-cascade/scope-shadow.html         |   60 +
 ...t-visibility-auto-applied-to-th-crash.html |   21 +
 .../image-set/image-set-parsing.html          |  138 +-
 ...mage-set-type-unsupported-rendering-2.html |    5 +-
 .../image-set-type-unsupported-rendering.html |    8 +-
 .../animations/mask-image-interpolation.html  |  110 +-
 ...jectboundingbox-content-clip-transform.svg |    1 +
 .../mask-objectboundingbox-content-clip.svg   |    1 +
 ...-userspaceonuse-content-clip-transform.svg |    1 +
 .../mask-userspaceonuse-content-clip.svg      |    1 +
 .../clip-path/clip-path-circle-001.html       |    1 +
 .../clip-path/clip-path-circle-002.html       |    1 +
 .../clip-path/clip-path-circle-003.html       |    1 +
 .../clip-path/clip-path-circle-004.html       |    1 +
 .../clip-path/clip-path-circle-005.html       |    1 +
 .../clip-path/clip-path-circle-006.html       |    1 +
 .../clip-path/clip-path-circle-007.html       |    1 +
 .../clip-path/clip-path-circle-008.html       |    1 +
 .../clip-path/clip-path-ellipse-001.html      |    1 +
 .../clip-path/clip-path-ellipse-002.html      |    1 +
 .../clip-path/clip-path-ellipse-003.html      |    1 +
 .../clip-path/clip-path-ellipse-004.html      |    1 +
 .../clip-path/clip-path-ellipse-005.html      |    1 +
 .../clip-path/clip-path-ellipse-006.html      |    1 +
 .../clip-path/clip-path-ellipse-007.html      |    1 +
 .../clip-path/clip-path-ellipse-008.html      |    1 +
 ...-property-animation-used-in-shorthand.html |   34 +
 .../reference/text-align-end-ref-016.html     |   21 +-
 .../reference/text-align-end-ref-017.html     |   19 -
 .../text-align/text-align-end-016.html        |   24 +-
 .../text-align/text-align-end-017.html        |   19 +-
 .../toggle-aria-roles.tentative.html          |  354 ++++
 ... mq-non-matching-lazy-load.tentative.html} |    0
 .../mediaqueries/overflow-media-features.html |   53 +
 .../css/mediaqueries/test_media_queries.html  |    2 +-
 .../nth-last-child-containing-ancestor.html   |   23 +
 .../nth-last-child-in-shadow-root-ref.html    |    8 +
 .../nth-last-child-in-shadow-root.html        |   24 +
 .../nth-last-child-of-attr-ref.html           |   13 +
 .../invalidation/nth-last-child-of-attr.html  |   26 +
 .../nth-last-child-of-class-ref.html          |   13 +
 .../invalidation/nth-last-child-of-class.html |   26 +
 .../nth-last-child-of-has-ref.html            |   13 +
 .../invalidation/nth-last-child-of-has.html   |   26 +
 .../nth-last-child-of-in-ancestor-ref.html    |   11 +
 .../nth-last-child-of-in-ancestor.html        |   24 +
 .../nth-last-child-of-sibling-ref.html        |   13 +
 .../nth-last-child-of-sibling.html            |   26 +
 ...-last-child-when-ancestor-changes-ref.html |   11 +
 .../nth-last-child-when-ancestor-changes.html |   24 +
 ...h-last-child-when-sibling-changes-ref.html |   12 +
 .../nth-last-child-when-sibling-changes.html  |   25 +
 .../dom/nodes/Node-lookupNamespaceURI.html    |   39 +-
 .../xpathevaluatorbase-creatensresolver.html  |   41 +
 .../fetch/api/abort/general.any.js            |    1 +
 .../resources/shared-worker-blob-fetcher.html |   50 +
 .../resources/support.sub.js                  |   18 +
 .../resources/worker-blob-fetcher.html        |    2 +-
 .../shared-worker-blob-fetch.https.window.js  |  153 ++
 .../shared-worker-blob-fetch.window.js        |  173 ++
 .../worker-blob-fetch.window.js               |    2 +-
 .../2d.layer.endlayer.alone-expected.html     |   21 +
 .../layers/2d.layer.endlayer.alone.html       |   24 +
 .../2d.layer.endlayer.unmatched-expected.html |   24 +
 .../layers/2d.layer.endlayer.unmatched.html   |   28 +
 ...l-states.alpha.filter.shadow-expected.html |    2 +-
 ...yer.global-states.alpha.filter.shadow.html |    2 +-
 ...obal-states.no_global_states-expected.html |   30 +
 ....layer.global-states.no_global_states.html |   30 +
 .../layers/2d.layer.nested-expected.html      |   37 +
 .../element/layers/2d.layer.nested.html       |   36 +
 .../2d.layer.restore-style-expected.html      |   24 +
 .../layers/2d.layer.restore-style.html        |   25 +
 .../2d.layer.several-complex-expected.html    |   35 +
 .../layers/2d.layer.several-complex.html      |   35 +
 .../layers/layers-endlayer-noop-expected.html |   24 -
 .../manual/layers/layers-endlayer-noop.html   |   27 -
 .../layers/layers-loneendlayer-expected.html  |   18 -
 .../manual/layers/layers-loneendlayer.html    |   21 -
 .../manual/layers/layers-nested-expected.html |   34 -
 .../element/manual/layers/layers-nested.html  |   34 -
 .../layers/layers-restorestyle-expected.html  |   23 -
 .../manual/layers/layers-restorestyle.html    |   25 -
 .../layers-several-complex-expected.html      |   33 -
 .../manual/layers/layers-several-complex.html |   33 -
 .../2d.layer.endlayer.alone-expected.html     |   21 +
 .../layers/2d.layer.endlayer.alone.html       |   27 +
 .../layers/2d.layer.endlayer.alone.w.html     |   41 +
 .../2d.layer.endlayer.unmatched-expected.html |   24 +
 .../layers/2d.layer.endlayer.unmatched.html   |   31 +
 .../layers/2d.layer.endlayer.unmatched.w.html |   45 +
 ...l-states.alpha.filter.shadow-expected.html |    2 +-
 ...yer.global-states.alpha.filter.shadow.html |    2 +-
 ...r.global-states.alpha.filter.shadow.w.html |    2 +-
 ...obal-states.no_global_states-expected.html |   30 +
 ....layer.global-states.no_global_states.html |   33 +
 ...ayer.global-states.no_global_states.w.html |   47 +
 .../layers/2d.layer.nested-expected.html      |   37 +
 .../offscreen/layers/2d.layer.nested.html     |   39 +
 .../offscreen/layers/2d.layer.nested.w.html   |   53 +
 .../2d.layer.restore-style-expected.html      |   24 +
 .../layers/2d.layer.restore-style.html        |   28 +
 .../layers/2d.layer.restore-style.w.html      |   42 +
 .../2d.layer.several-complex-expected.html    |   35 +
 .../layers/2d.layer.several-complex.html      |   38 +
 .../layers/2d.layer.several-complex.w.html    |   52 +
 .../html/canvas/tools/yaml-new/layers.yaml    |  197 +-
 ...media-does-not-block-render.tentative.html |   21 +
 .../support/link-style.css                    |    3 +
 .../textfieldselection/select-event.html      |    2 +-
 .../popovers/popover-attribute-basic.html     |   27 +-
 .../popover-beforetoggle-opening-event.html   |    3 +-
 .../semantics/popovers/popover-events.html    |    6 +
 .../actions/actionsWithKeyPressed.html.ini    |    3 +
 tests/wpt/web-platform-tests/lint.ignore      |    1 +
 .../media-source/mediasource-remove.html      |   29 +
 ...interevent_auxclick_is_a_pointerevent.html |    4 +-
 .../pointerevent_click_is_a_pointerevent.html |    3 +
 ...erevent_contextmenu_is_a_pointerevent.html |    4 +-
 .../pointerevents/pointerevent_support.js     |   10 +
 .../preload/modulepreload.html                |   24 +-
 .../resources/chromium/mock-direct-sockets.js |    9 +
 .../resources/chromium/nfc-mock.js            |    2 +-
 .../hasStorageAccess-insecure.sub.window.js   |   10 +-
 .../hasStorageAccess.sub.https.window.js      |   18 +-
 .../storage-access-api/helpers.js             |   44 +-
 ...igin-iframe-navigation.sub.https.window.js |   18 +-
 ...ss-cross-origin-iframe.sub.https.window.js |    2 +-
 ...origin-sibling-iframes.sub.https.window.js |   19 +-
 ...cess-cross-site-iframe.sub.https.window.js |    9 +
 ...equestStorageAccess-insecure.sub.window.js |    8 +-
 ...ed-cross-origin-iframe.sub.https.window.js |    2 +-
 ...sted-cross-site-iframe.sub.https.window.js |   10 +
 ...ted-same-origin-iframe.sub.https.window.js |    2 +-
 ...ess-same-origin-iframe.sub.https.window.js |    2 +-
 .../requestStorageAccess.sub.https.window.js  |   48 +-
 .../resources/echo-cookie-header.py           |    4 +
 .../resources/embedded_responder.js           |    9 +
 ...rage-access-permission.sub.https.window.js |   12 +-
 .../storageAccess.testdriver.sub.html         |   10 +-
 .../animateMotion-from-to-rotate-auto.html    |   45 +
 .../svg/styling/use-element-animations.html   |   26 +
 .../styling/use-element-transitions-ref.html  |   12 +
 .../svg/styling/use-element-transitions.html  |   30 +
 .../styling/use-element-web-animations.html   |   25 +
 .../reftests/lang-attribute-dynamic-ref.svg   |    2 +-
 .../tools/manifest/tests/test_manifest.py     |    6 +
 .../tools/webdriver/webdriver/bidi/error.py   |    4 +
 .../webdriver/bidi/modules/script.py          |   32 +
 .../tools/wptserve/wptserve/server.py         |   26 +-
 .../url/resources/setters_tests.json          |   11 +
 .../url/urlsearchparams-size.any.js           |   34 +
 .../web-nfc/resources/nfc-helpers.js          |    4 +-
 .../createcredential-minpinlength.https.html  |    2 +-
 .../webauthn/resources/common-inputs.js       |    2 +-
 .../webauthn-testdriver-basic.https.html      |    6 +-
 .../script/add_preload_script/__init__.py     |    0
 .../add_preload_script_tentative.py           |  172 ++
 .../add_preload_script/invalid_tentative.py   |   29 +
 .../add_preload_script/sandbox_tentative.py   |   70 +
 .../bidi/script/call_function/result_node.py  |    9 -
 .../tests/bidi/script/evaluate/result_node.py |    9 -
 .../script/remove_preload_script/__init__.py  |    0
 .../invalid_tentative.py                      |   15 +
 .../remove_preload_script_tentative.py        |   80 +
 .../sandbox_tentative.py                      |   42 +
 .../webdriver/tests/get_active_element/get.py |   22 +
 .../webdriver/tests/support/fixtures_bidi.py  |   29 +-
 .../webrtc/RTCRtpReceiver-getStats.https.html |   20 +
 .../webrtc/RTCRtpSender-getStats.https.html   |   19 +
 .../webtransport/constructor.https.any.js     |   19 +
 265 files changed, 5992 insertions(+), 974 deletions(-)
 create mode 100644 tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini
 create mode 100644 tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini
 create mode 100644 tests/wpt/metadata/css/CSS2/positioning/absolute-replaced-width-036.xht.ini
 create mode 100644 tests/wpt/metadata/css/css-animations/sample-on-last-keyframe.html.ini
 delete mode 100644 tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-2.html.ini
 delete mode 100644 tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-3.html.ini
 delete mode 100644 tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
 delete mode 100644 tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
 create mode 100644 tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini
 delete mode 100644 tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
 create mode 100644 tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
 rename tests/wpt/metadata/css/mediaqueries/{mq-non-matching-lazy-load.html.ini => mq-non-matching-lazy-load.tentative.html.ini} (70%)
 create mode 100644 tests/wpt/metadata/css/mediaqueries/overflow-media-features.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-containing-ancestor.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-in-shadow-root.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-attr.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-class.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-has.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-in-ancestor.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-sibling.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html.ini
 create mode 100644 tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-sibling-changes.html.ini
 create mode 100644 tests/wpt/metadata/dom/nodes/Node-lookupNamespaceURI.html.ini
 create mode 100644 tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.https.window.js.ini
 create mode 100644 tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.window.js.ini
 delete mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
 delete mode 100644 tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
 create mode 100644 tests/wpt/metadata/html/browsers/history/the-history-interface/traverse-during-unload.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/element/layers/2d.layer.restore-style.html.ini
 delete mode 100644 tests/wpt/metadata/html/canvas/element/manual/layers/layers-restorestyle.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.nested.w.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.w.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.html.ini
 create mode 100644 tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.w.html.ini
 create mode 100644 tests/wpt/metadata/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html.ini
 delete mode 100644 tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
 create mode 100644 tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
 create mode 100644 tests/wpt/metadata/url/urlsearchparams-size.any.js.ini
 rename tests/wpt/metadata/webmessaging/{without-ports => with-ports}/017.html.ini (100%)
 rename tests/wpt/metadata/webmessaging/{without-ports => with-ports}/018.html.ini (100%)
 delete mode 100644 tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
 delete mode 100644 tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini
 create mode 100644 tests/wpt/web-platform-tests/css/css-animations/sample-on-last-keyframe.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001a.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001b.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002a.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002b.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-cascade/scope-shadow.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-contain/content-visibility/content-visibility-auto-applied-to-th-crash.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-properties-values-api/animation/custom-property-animation-used-in-shorthand.html
 delete mode 100644 tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-017.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-toggle/toggle-aria-roles.tentative.html
 rename tests/wpt/web-platform-tests/css/mediaqueries/{mq-non-matching-lazy-load.html => mq-non-matching-lazy-load.tentative.html} (100%)
 create mode 100644 tests/wpt/web-platform-tests/css/mediaqueries/overflow-media-features.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-containing-ancestor.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes.html
 create mode 100644 tests/wpt/web-platform-tests/domxpath/xpathevaluatorbase-creatensresolver.html
 create mode 100644 tests/wpt/web-platform-tests/fetch/private-network-access/resources/shared-worker-blob-fetcher.html
 create mode 100644 tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.window.js
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop-expected.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer-expected.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested-expected.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle-expected.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex-expected.html
 delete mode 100644 tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.html
 create mode 100644 tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.w.html
 create mode 100644 tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html
 create mode 100644 tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/support/link-style.css
 create mode 100644 tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/actionsWithKeyPressed.html.ini
 create mode 100644 tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-site-iframe.sub.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-site-iframe.sub.https.window.js
 create mode 100644 tests/wpt/web-platform-tests/storage-access-api/resources/echo-cookie-header.py
 create mode 100644 tests/wpt/web-platform-tests/svg/animations/animateMotion-from-to-rotate-auto.html
 create mode 100644 tests/wpt/web-platform-tests/svg/styling/use-element-animations.html
 create mode 100644 tests/wpt/web-platform-tests/svg/styling/use-element-transitions-ref.html
 create mode 100644 tests/wpt/web-platform-tests/svg/styling/use-element-transitions.html
 create mode 100644 tests/wpt/web-platform-tests/svg/styling/use-element-web-animations.html
 create mode 100644 tests/wpt/web-platform-tests/url/urlsearchparams-size.any.js
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/__init__.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/add_preload_script_tentative.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/invalid_tentative.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/sandbox_tentative.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/__init__.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/invalid_tentative.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/remove_preload_script_tentative.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/sandbox_tentative.py

diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
index cdeaf7f7080bc..282ab0b252557 100644
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -7,7 +7,7 @@
     expected: FAIL
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
     expected: TIMEOUT
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index d4884886352a1..41faf24593264 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -1395,6 +1395,13 @@
       }
      },
      "content-visibility": {
+      "content-visibility-auto-applied-to-th-crash.html": [
+       "cde696e2f65d2c22bec8750c15ddb3ece3e1acf3",
+       [
+        null,
+        {}
+       ]
+      ],
       "content-visibility-auto-selection-crash.html": [
        "4cfe62eaca276dbd07f0d049e1d77b23ba898b65",
        [
@@ -129137,7 +129144,7 @@
       ]
      ],
      "background-gradient-subpixel-fills-area.html": [
-      "f723350de685378579ab0b7a6fde248969957511",
+      "2a305068fe4ceb41380f6447bb0f2adb2cd141b5",
       [
        null,
        [
@@ -129146,7 +129153,23 @@
          "=="
         ]
        ],
-       {}
+       {
+        "fuzzy": [
+         [
+          null,
+          [
+           [
+            0,
+            1
+           ],
+           [
+            6800,
+            6800
+           ]
+          ]
+         ]
+        ]
+       }
       ]
      ],
      "background-image-001.html": [
@@ -130363,7 +130386,7 @@
        ]
       ],
       "background-size-cover-svg.html": [
-       "01cbc17e5c6530e7029b644b5efaa64436e4e8e0",
+       "091600a185fcd1b07fd7d457b93ddd17936fe502",
        [
         null,
         [
@@ -130372,7 +130395,23 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             1
+            ],
+            [
+             0,
+             1200
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "background-size-cover.xht": [
@@ -133644,7 +133683,7 @@
       ]
      ],
      "background-size-cover-003.html": [
-      "4d2b6b125eac077de87a9197731bd917781cbf7e",
+      "83287ee2cf43df5fabc1b899adc4240a8e9f40e8",
       [
        null,
        [
@@ -133653,7 +133692,23 @@
          "=="
         ]
        ],
-       {}
+       {
+        "fuzzy": [
+         [
+          null,
+          [
+           [
+            0,
+            255
+           ],
+           [
+            0,
+            1
+           ]
+          ]
+         ]
+        ]
+       }
       ]
      ],
      "background-size-one-value-1x1-image.html": [
@@ -138067,6 +138122,58 @@
         {}
        ]
       ],
+      "flex-item-content-overflow-001a.html": [
+       "0b8074e03b9958a0fb049cd70a3e551e0f2305a0",
+       [
+        null,
+        [
+         [
+          "/css/css-break/flexbox/flex-item-content-overflow-001-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "flex-item-content-overflow-001b.html": [
+       "50f958614ce845e99a67f94899bcaa01cea31d85",
+       [
+        null,
+        [
+         [
+          "/css/css-break/flexbox/flex-item-content-overflow-001-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "flex-item-content-overflow-002a.html": [
+       "18e659dd3e292ebc13a73aba5e0f88d5126436e2",
+       [
+        null,
+        [
+         [
+          "/css/css-break/flexbox/flex-item-content-overflow-001-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "flex-item-content-overflow-002b.html": [
+       "af985b2aa2ea1953d50d237cc30d14afed16aa26",
+       [
+        null,
+        [
+         [
+          "/css/css-break/flexbox/flex-item-content-overflow-001-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "increase-fragmentainer-size-flex-item-trailing-margin.html": [
        "94845449fbf185b2004cc532ecb401eab4e4221d",
        [
@@ -190011,12 +190118,12 @@
        ]
       ],
       "image-set-type-unsupported-rendering-2.html": [
-       "ea2dd6f9795da60c0161ac0161c9d64e3bdbee21",
+       "bebc32d87d389a0d19e061eac31f96731f2aa042",
        [
         null,
         [
          [
-          "/css/css-images/image-set/reference/image-set-rendering-ref.html",
+          "/css/reference/blank.html",
           "=="
          ]
         ],
@@ -190024,12 +190131,12 @@
        ]
       ],
       "image-set-type-unsupported-rendering.html": [
-       "ef7c4a20efba60babec0f0bd08b772e684524d7e",
+       "486fcb3a8e04e216ef074b5c63db7d9639bb740b",
        [
         null,
         [
          [
-          "/css/css-images/image-set/reference/image-set-rendering-ref.html",
+          "/css/reference/blank.html",
           "=="
          ]
         ],
@@ -197991,7 +198098,7 @@
        ]
       ],
       "clip-path-circle-001.html": [
-       "d38b909a4d43ce7dd26be39a11d607fa76331320",
+       "e40cdb103a97e4b14c7fda8efcc3d2503fab17f7",
        [
         null,
         [
@@ -198000,11 +198107,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-002.html": [
-       "ab672aaa2af24c046d9d78f4a7c231abfa94afad",
+       "deb199a5b66fcc8f0cf60715867763aaca798a5a",
        [
         null,
         [
@@ -198013,11 +198136,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-003.html": [
-       "6c6eadb8e9860b3fc435d540b75b6c5f54cc8f74",
+       "24b3f31f61b5945cf953197aca016bb5a65f8b35",
        [
         null,
         [
@@ -198026,11 +198165,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-004.html": [
-       "6244d38ee5b8f7bd06494e6697d958b3a87692c6",
+       "ddbccf0336d798bccda9527b3c67588fb7ae269a",
        [
         null,
         [
@@ -198039,11 +198194,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-005.html": [
-       "bcabc72dc0b32930373f6b2102efd0f2e40fc530",
+       "3a25ce5fff79cbc25633090bdc017f532ace0511",
        [
         null,
         [
@@ -198052,11 +198223,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-006.html": [
-       "9de416a2068e95620fce64bbbdb805ccd5d9958d",
+       "8434edd2160559c40f7ef3c5df9cb7e75d42ddbd",
        [
         null,
         [
@@ -198065,11 +198252,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-007.html": [
-       "7ff3fdd00096f5682c89bb03b7721c967160db3d",
+       "60c5cd52e327b5fdda7799f197e35a3060773fa9",
        [
         null,
         [
@@ -198078,11 +198281,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-circle-008.html": [
-       "31ae8ee5823b6d2e1d34d2ca31d71399ddd08a1c",
+       "a931d3e319ea57686059c806b5d5c47d698ad07d",
        [
         null,
         [
@@ -198091,7 +198310,23 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-columns-shape-001.html": [
@@ -198283,7 +198518,7 @@
        ]
       ],
       "clip-path-ellipse-001.html": [
-       "197f422ce4b57c46466e6f497202605ae00cccfc",
+       "f48b197137cec3ac4131658018c3d6497dcadfce",
        [
         null,
         [
@@ -198292,11 +198527,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-002.html": [
-       "36f63fc5e9c69c3c0cef522ec98cf48674559d2f",
+       "ecc5ca090f7dfad86d1f095dbcdce9a857caf151",
        [
         null,
         [
@@ -198305,11 +198556,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-003.html": [
-       "81ded182923f42031b57f700505e72bbe7fe73fc",
+       "eff287614b12ae882494f5f54d33ba0f74ee0a96",
        [
         null,
         [
@@ -198318,11 +198585,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             800
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-004.html": [
-       "f62f958fb6304a0e62f0fdd2177d898469be1aa0",
+       "3988840943c85d5819cf78182570d3279349c8f6",
        [
         null,
         [
@@ -198331,11 +198614,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-005.html": [
-       "2e819e79b0044a7e2c464dae5f599a8763229e56",
+       "c7107d26171d8072acaf2e915356f7d7abf8defc",
        [
         null,
         [
@@ -198344,11 +198643,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-006.html": [
-       "fb20f0243bdc8b7ba9bca97a57fe09c6cfa49aca",
+       "d0b4efafebf46b5f2f9aa17bb2dd9b701c08cdb9",
        [
         null,
         [
@@ -198357,11 +198672,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-007.html": [
-       "42d8b451ff0dee11ba0275eae01d50c2e2c6473b",
+       "2105b36df370e7030dd3d74a74ec4540fd71cd33",
        [
         null,
         [
@@ -198370,11 +198701,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-ellipse-008.html": [
-       "12df558fd2c2fa64783720cb9d1be07fa7f85572",
+       "4e4ac5184299566b5376164fd5af9ad5a854148e",
        [
         null,
         [
@@ -198383,7 +198730,23 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             400
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "clip-path-fillBox-1a.html": [
@@ -200652,7 +201015,7 @@
        ]
       ],
       "mask-objectboundingbox-content-clip-transform.svg": [
-       "fc1f768878e19f65258c6bf1b7de058497caaf33",
+       "e3ca1fbdba7da3de6c5465f9af9a9e0666debfe3",
        [
         null,
         [
@@ -200661,11 +201024,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             200
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "mask-objectboundingbox-content-clip.svg": [
-       "a8d8a12dc0e02ea1118e2d4e5002191951a1f01b",
+       "47cf9006974d7edc11eb142485b53db5d486b94e",
        [
         null,
         [
@@ -200674,11 +201053,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             200
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "mask-userspaceonuse-content-clip-transform.svg": [
-       "b979ff312a0faa9996553567db4872734abb2cbc",
+       "03310225e209da75aafb57f081a610d6c7f18e01",
        [
         null,
         [
@@ -200687,11 +201082,27 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             200
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ],
       "mask-userspaceonuse-content-clip.svg": [
-       "c9f3cf8f69f4cf0f9628f17cbc647937656ab368",
+       "09eb2dfcd01be0775ba6f352b9cff7ce8cd2640f",
        [
         null,
         [
@@ -200700,7 +201111,23 @@
           "=="
          ]
         ],
-        {}
+        {
+         "fuzzy": [
+          [
+           null,
+           [
+            [
+             0,
+             38
+            ],
+            [
+             0,
+             200
+            ]
+           ]
+          ]
+         ]
+        }
        ]
       ]
      },
@@ -235618,7 +236045,7 @@
        ]
       ],
       "text-align-end-016.html": [
-       "42495c7f3f64eaaf5066b730737c22517cd93b4b",
+       "2b8a9b38298a0fd1a5e931e14cfdf8b7ee59868b",
        [
         null,
         [
@@ -235631,12 +236058,12 @@
        ]
       ],
       "text-align-end-017.html": [
-       "02eaa4c27193d9a85ad6ff94aaac1c82bb9adde7",
+       "4420808eaaddb5b83acaa669bc1c4d633925fa0b",
        [
         null,
         [
          [
-          "/css/css-text/text-align/reference/text-align-end-ref-017.html",
+          "/css/css-text/text-align/reference/text-align-end-ref-015.html",
           "=="
          ]
         ],
@@ -297777,6 +298204,123 @@
         {}
        ]
       ],
+      "nth-last-child-containing-ancestor.html": [
+       "f3a63bdb2e5ade24142c1e42cf0c1f37208ef07d",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-child-containing-ancestor-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-in-shadow-root.html": [
+       "7cbd2e6687714a8551f276d09b7dd598d3c18ddc",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-in-shadow-root-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-of-attr.html": [
+       "9381796bf1636d33ece681581db693985c151757",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-of-attr-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-of-class.html": [
+       "2026796bb927c48782946fbf3e0d215d9e343534",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-of-class-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-of-has.html": [
+       "0c80925f87ab0dab8f7240dea4451fcc747c2175",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-of-has-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-of-in-ancestor.html": [
+       "b4e0e6f4f6bec9584a7469d04266899f859e56ca",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-of-in-ancestor-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-of-sibling.html": [
+       "b7b9bd70ab8e3f3a2c95613709d26e501e5671aa",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-of-sibling-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-when-ancestor-changes.html": [
+       "1cc7020e5b1a9688dad2da1871c98c2e02709ec4",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-when-ancestor-changes-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "nth-last-child-when-sibling-changes.html": [
+       "a8c2156483846953ee97d30f4b9d7c9017f387c0",
+       [
+        null,
+        [
+         [
+          "/css/selectors/invalidation/nth-last-child-when-sibling-changes-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "sheet-going-away-002.html": [
        "189abbe0808a613eaab0e918fe82a4982fbcfa63",
        [
@@ -301238,6 +301782,32 @@
        ]
       },
       "layers": {
+       "2d.layer.endlayer.alone.html": [
+        "a7a5933b33d0d9e6a183d1bd5ab3a2e88d6a507f",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.endlayer.alone-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.endlayer.unmatched.html": [
+        "5f5398323264e5cc33b4f6ebb744128b92d18946",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.endlayer.unmatched-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
        "2d.layer.global-states.alpha.filter.globalcompositeoperation.html": [
         "54bafb9e65244d633d484d1583008f3c8b29663b",
         [
@@ -301265,7 +301835,7 @@
         ]
        ],
        "2d.layer.global-states.alpha.filter.shadow.html": [
-        "cccdf42edce0a420321e3ab31c650dca253396a7",
+        "3b4727bfc34f1e4639c2d7e4c7d933fd1f401419",
         [
          null,
          [
@@ -301387,6 +301957,19 @@
          {}
         ]
        ],
+       "2d.layer.global-states.no_global_states.html": [
+        "93d2bdeb9276f283f15331cf562511b45dd90fd1",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.global-states.no_global_states-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
        "2d.layer.global-states.shadow.html": [
         "da78b3435c780cb63f0ee06c797cb08692552e60",
         [
@@ -301399,6 +301982,77 @@
          ],
          {}
         ]
+       ],
+       "2d.layer.nested.html": [
+        "a508d8e5c8581f87f2c40dde972509fe39c57811",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.nested-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.restore-style.html": [
+        "2537f409d6d99e0175667725ffedd5c384071864",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.restore-style-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              1
+             ],
+             [
+              0,
+              950
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
+       ],
+       "2d.layer.several-complex.html": [
+        "f99357bd7fd1b6bf56cc05e37ba56badd9f6fadd",
+        [
+         null,
+         [
+          [
+           "/html/canvas/element/layers/2d.layer.several-complex-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              3
+             ],
+             [
+              0,
+              6318
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
        ]
       },
       "manual": {
@@ -302202,121 +302856,6 @@
          ]
         ]
        },
-       "layers": {
-        "layers-endlayer-noop.html": [
-         "aae72cfeaefc80f24c2894a98f233d47f2aad8bd",
-         [
-          null,
-          [
-           [
-            "/html/canvas/element/manual/layers/layers-endlayer-noop-expected.html",
-            "=="
-           ]
-          ],
-          {}
-         ]
-        ],
-        "layers-loneendlayer.html": [
-         "f0584d385cc69c3eeb97f6df43f45a721961bfb7",
-         [
-          null,
-          [
-           [
-            "/html/canvas/element/manual/layers/layers-loneendlayer-expected.html",
-            "=="
-           ]
-          ],
-          {}
-         ]
-        ],
-        "layers-nested.html": [
-         "fb52976ac8a44b197bc448d799ff06a8024085ab",
-         [
-          null,
-          [
-           [
-            "/html/canvas/element/manual/layers/layers-nested-expected.html",
-            "=="
-           ]
-          ],
-          {
-           "fuzzy": [
-            [
-             null,
-             [
-              [
-               0,
-               2
-              ],
-              [
-               0,
-               14000
-              ]
-             ]
-            ]
-           ]
-          }
-         ]
-        ],
-        "layers-restorestyle.html": [
-         "659b6c0ba05ce46a278414da300b3de5229f6da7",
-         [
-          null,
-          [
-           [
-            "/html/canvas/element/manual/layers/layers-restorestyle-expected.html",
-            "=="
-           ]
-          ],
-          {
-           "fuzzy": [
-            [
-             null,
-             [
-              [
-               0,
-               1
-              ],
-              [
-               0,
-               14000
-              ]
-             ]
-            ]
-           ]
-          }
-         ]
-        ],
-        "layers-several-complex.html": [
-         "66840bbab951aaea6cfb10c6896bf689133fa74f",
-         [
-          null,
-          [
-           [
-            "/html/canvas/element/manual/layers/layers-several-complex-expected.html",
-            "=="
-           ]
-          ],
-          {
-           "fuzzy": [
-            [
-             null,
-             [
-              [
-               0,
-               3
-              ],
-              [
-               0,
-               19000
-              ]
-             ]
-            ]
-           ]
-          }
-         ]
-        ]
-       },
        "line-styles": {
         "canvas_linestyles_linecap_001.htm": [
          "583dbc9d134682a778569877e38513e07736dd82",
@@ -302500,6 +303039,58 @@
      },
      "offscreen": {
       "layers": {
+       "2d.layer.endlayer.alone.html": [
+        "f088c89aa7cb1c678c16bc2f317385254f645007",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.endlayer.alone.w.html": [
+        "96c8011550665865f7684aec66c887053ee98ee2",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.endlayer.unmatched.html": [
+        "a87c7364cfa1069df8269d79aa71a565d951369a",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.endlayer.unmatched.w.html": [
+        "9507809a528426755f2aa0a3a41c7235b4cfe127",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
        "2d.layer.global-states.alpha.filter.globalcompositeoperation.html": [
         "88d339fb1b112763151ad8573f6edc082d2be611",
         [
@@ -302540,7 +303131,7 @@
         ]
        ],
        "2d.layer.global-states.alpha.filter.shadow.html": [
-        "3e5e5bd9ba13aaa3bcf448704e1a0981999aab3b",
+        "07d5d793791dc923c681c79a97682b4dbe05cd5f",
         [
          null,
          [
@@ -302569,7 +303160,7 @@
         ]
        ],
        "2d.layer.global-states.alpha.filter.shadow.w.html": [
-        "9fac030db321a05bf6908eb29a916fca63773df1",
+        "40039c247d6507a442017081dd0fd349f16d5efb",
         [
          null,
          [
@@ -302798,6 +303389,32 @@
          {}
         ]
        ],
+       "2d.layer.global-states.no_global_states.html": [
+        "6769d47e7716f30eb047d9938b6825015fcd1258",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.global-states.no_global_states.w.html": [
+        "7628d387e994fac5dde8f9a726edbc222aea950b",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
        "2d.layer.global-states.shadow.html": [
         "87b8224f856acedb3d30342bba45a40adb646841",
         [
@@ -302823,6 +303440,148 @@
          ],
          {}
         ]
+       ],
+       "2d.layer.nested.html": [
+        "0c168493c2143cd68e2a21fedbd64a2438e0a6a5",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.nested-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.nested.w.html": [
+        "3b81691e06ba27bc1f8f57e14af117ee72677523",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.nested-expected.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "2d.layer.restore-style.html": [
+        "66f99835df4dbc04adc5ab3aedbf83d3116ee9e5",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              1
+             ],
+             [
+              0,
+              950
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
+       ],
+       "2d.layer.restore-style.w.html": [
+        "a717a1d31222b4f5c7d5f481156a613259660a1f",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              1
+             ],
+             [
+              0,
+              950
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
+       ],
+       "2d.layer.several-complex.html": [
+        "b4b2a8da602e6326af41c2b674d5fda8ef7b217f",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              3
+             ],
+             [
+              0,
+              6318
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
+       ],
+       "2d.layer.several-complex.w.html": [
+        "5260cc2724d38f90a038410f3184e5a47ecb4a5a",
+        [
+         null,
+         [
+          [
+           "/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html",
+           "=="
+          ]
+         ],
+         {
+          "fuzzy": [
+           [
+            null,
+            [
+             [
+              0,
+              3
+             ],
+             [
+              0,
+              6318
+             ]
+            ]
+           ]
+          ]
+         }
+        ]
        ]
       }
      }
@@ -316837,7 +317596,46 @@
         {}
        ]
       ]
-     }
+     },
+     "use-element-animations.html": [
+      "b09606011818f9979fa222f89661f7ca04031b1f",
+      [
+       null,
+       [
+        [
+         "/svg/styling/use-element-transitions-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "use-element-transitions.html": [
+      "68653835f44f8a4787983df30a011d532e0c04dc",
+      [
+       null,
+       [
+        [
+         "/svg/styling/use-element-transitions-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "use-element-web-animations.html": [
+      "bbf878b3a90e8348ef30754c9aaefe43a220f76f",
+      [
+       null,
+       [
+        [
+         "/svg/styling/use-element-transitions-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ]
     },
     "text": {
      "reftests": {
@@ -324627,7 +325425,7 @@
      ],
      "resources": {
       "common.sub.js": [
-       "d0f88f170107b30d10a151b1e94eb2126a546bf5",
+       "96ca280597bf2957bdf168412eefada32b0683ba",
        []
       ],
       "common.sub.js.headers": [
@@ -324701,7 +325499,7 @@
        []
       ],
       "static-import.py": [
-       "717d3de6b186b20b1b5fcbfcb361e24168feda15",
+       "3c3a6f6871d32c38b2d979fafea1ba8a1c8e6bc2",
        []
       ],
       "stylesheet.py": [
@@ -344094,7 +344892,7 @@
       ]
      },
      "test-case.sub.js": [
-      "81d9e1c8e3ec8f2150e88a000cdc379b2c197444",
+      "d9a6494dd36af93f0e66209525caf6de37e9368b",
       []
      ],
      "unreached.js": [
@@ -345386,7 +346184,7 @@
       []
      ],
      "set-cookie.py": [
-      "839f350c449fb0aba3d573e155407d38039effed",
+      "b18408767c1cf1d0d0e9d81011c246d4a729540c",
       []
      ],
      "set.py": [
@@ -364439,7 +365237,7 @@
        []
       ],
       "testcommon.js": [
-       "654aaa51c55c03b9b1c52f79e52d4f178d7aacc4",
+       "49c9863147ee365aff5c23f852d71856df8ab17c",
        []
       ]
      },
@@ -365421,7 +366219,7 @@
      ],
      "hidpi": {
       "simple-bg-color-ref.html": [
-       "d768c02b25a82e45cd8cb9e7120d2655d55f33d5",
+       "1030d005d93f91290f16bc6960363eb873539486",
        []
       ]
      },
@@ -366554,6 +367352,10 @@
        "ead53ad704a08d06a2e88ed5e43b9bcaf55aa584",
        []
       ],
+      "flex-item-content-overflow-001-ref.html": [
+       "f4caedc110f43c67777fe1076cf4fb9cd821c97e",
+       []
+      ],
       "multi-line-column-flex-fragmentation-041-ref.html": [
        "4924a792b73fe47bd463e8d5fd94c073fd586726",
        []
@@ -391180,11 +391982,7 @@
         []
        ],
        "text-align-end-ref-016.html": [
-        "e661e80915e5eea95edd3c5ec448cf6554d1a85b",
-        []
-       ],
-       "text-align-end-ref-017.html": [
-        "15b37fbd246ad21e8c834c6de8f37994b63d67a8",
+        "f571c9e3d328eac31e0ff52acbe927a6d8de0ef7",
         []
        ],
        "text-align-justify-ref-001.html": [
@@ -401586,6 +402384,38 @@
        "9a397529900cbb8e6248d94dccd1e52670f83ec5",
        []
       ],
+      "nth-last-child-in-shadow-root-ref.html": [
+       "3eb330f58c50ed9c3cc5aefd67477e05dd1a9c33",
+       []
+      ],
+      "nth-last-child-of-attr-ref.html": [
+       "6d0eb88a8112dc8dc6141aad10af375eca747a27",
+       []
+      ],
+      "nth-last-child-of-class-ref.html": [
+       "6d0eb88a8112dc8dc6141aad10af375eca747a27",
+       []
+      ],
+      "nth-last-child-of-has-ref.html": [
+       "6d0eb88a8112dc8dc6141aad10af375eca747a27",
+       []
+      ],
+      "nth-last-child-of-in-ancestor-ref.html": [
+       "21e6ae0f6f8c50a6d10f91b755cb35cf91713672",
+       []
+      ],
+      "nth-last-child-of-sibling-ref.html": [
+       "349a7b66fb5f4480e5f994dc635b27623dcc3672",
+       []
+      ],
+      "nth-last-child-when-ancestor-changes-ref.html": [
+       "48eeb7b3c67e415950de1788f00b277095d82873",
+       []
+      ],
+      "nth-last-child-when-sibling-changes-ref.html": [
+       "627ebc074bf4306cd2d40e5462e35ee1fc036dd7",
+       []
+      ],
       "sheet-going-away-002-ref.html": [
        "67841617736730e588f5659fd485fb09a159bd33",
        []
@@ -406794,6 +407624,10 @@
        "30bde1e0542d144f9b5b0e47824802df13556ee2",
        []
       ],
+      "shared-worker-blob-fetcher.html": [
+       "a79869b2f96249969d44e5f18341fa1cbd094f4d",
+       []
+      ],
       "shared-worker-fetcher.html": [
        "4af4b1f23959e00c50d48a926f24d97edb8edb90",
        []
@@ -406803,11 +407637,11 @@
        []
       ],
       "support.sub.js": [
-       "a104021d158d93288ae5ad5e3f1674d304b0e875",
+       "29942a2111f616b22b37935be82573a053fe5fc5",
        []
       ],
       "worker-blob-fetcher.html": [
-       "18a454b7fa3628838da1d0d5cca0f6a61758c770",
+       "5a50271e11b57d808b01a5849b1bee7d3dbeba28",
        []
       ],
       "worker-fetcher.html": [
@@ -411141,6 +411975,14 @@
        ]
       },
       "layers": {
+       "2d.layer.endlayer.alone-expected.html": [
+        "607526e4376282dcb4b8a359ada7a23a5fdb3286",
+        []
+       ],
+       "2d.layer.endlayer.unmatched-expected.html": [
+        "e6dd85b7e261c50956d3018d6e2a56e4c3f87600",
+        []
+       ],
        "2d.layer.global-states.alpha-expected.html": [
         "72d97c663f863ca503eeaa42d8d1a78fbd0f32a8",
         []
@@ -411154,7 +411996,7 @@
         []
        ],
        "2d.layer.global-states.alpha.filter.shadow-expected.html": [
-        "9a49e366a953c1337989a8aa39546aec11df569e",
+        "857db7ba99191ba9af42b091753388975d5473fd",
         []
        ],
        "2d.layer.global-states.alpha.shadow-expected.html": [
@@ -411177,9 +412019,25 @@
         "7e2e021b552e5ab6d6007caa3fbe01f3d5a4bea6",
         []
        ],
+       "2d.layer.global-states.no_global_states-expected.html": [
+        "139ff8ac944e5a84a3d98045036edb3c92f9f1b0",
+        []
+       ],
        "2d.layer.global-states.shadow-expected.html": [
         "6787bdd1e50496f3cb05bcbecb2ffb29854e0442",
         []
+       ],
+       "2d.layer.nested-expected.html": [
+        "65525d4d6a23db56e5717147a60fa8e22d0519a2",
+        []
+       ],
+       "2d.layer.restore-style-expected.html": [
+        "1d0ac3558d1d4c15609c364a6e5678ed329fa272",
+        []
+       ],
+       "2d.layer.several-complex-expected.html": [
+        "1944ea6d2ac8f11f3c17d4114070547c5c8ccb73",
+        []
        ]
       },
       "manual": {
@@ -411403,28 +412261,6 @@
          []
         ]
        },
-       "layers": {
-        "layers-endlayer-noop-expected.html": [
-         "7f4937ecda40e2aa85864e518caf9bd48d870cb9",
-         []
-        ],
-        "layers-loneendlayer-expected.html": [
-         "cec5a54512c5782ce1574c6d4d191e483b776e26",
-         []
-        ],
-        "layers-nested-expected.html": [
-         "4647996adfc69b24ab3fb4779db03c6b987f36ba",
-         []
-        ],
-        "layers-restorestyle-expected.html": [
-         "f67a4571171ad5aae970c042e482395fa5f22870",
-         []
-        ],
-        "layers-several-complex-expected.html": [
-         "eca81cd8d72ce689d2635532b08b31de667aa1c8",
-         []
-        ]
-       },
        "line-styles": {
         "canvas_linestyles_linecap_001-ref.htm": [
          "f85af9aab2e509416e5105323c82b7bb8da28277",
@@ -411903,6 +412739,14 @@
        []
       ],
       "layers": {
+       "2d.layer.endlayer.alone-expected.html": [
+        "607526e4376282dcb4b8a359ada7a23a5fdb3286",
+        []
+       ],
+       "2d.layer.endlayer.unmatched-expected.html": [
+        "e6dd85b7e261c50956d3018d6e2a56e4c3f87600",
+        []
+       ],
        "2d.layer.global-states.alpha-expected.html": [
         "72d97c663f863ca503eeaa42d8d1a78fbd0f32a8",
         []
@@ -411916,7 +412760,7 @@
         []
        ],
        "2d.layer.global-states.alpha.filter.shadow-expected.html": [
-        "9a49e366a953c1337989a8aa39546aec11df569e",
+        "857db7ba99191ba9af42b091753388975d5473fd",
         []
        ],
        "2d.layer.global-states.alpha.shadow-expected.html": [
@@ -411939,9 +412783,25 @@
         "7e2e021b552e5ab6d6007caa3fbe01f3d5a4bea6",
         []
        ],
+       "2d.layer.global-states.no_global_states-expected.html": [
+        "139ff8ac944e5a84a3d98045036edb3c92f9f1b0",
+        []
+       ],
        "2d.layer.global-states.shadow-expected.html": [
         "6787bdd1e50496f3cb05bcbecb2ffb29854e0442",
         []
+       ],
+       "2d.layer.nested-expected.html": [
+        "65525d4d6a23db56e5717147a60fa8e22d0519a2",
+        []
+       ],
+       "2d.layer.restore-style-expected.html": [
+        "1d0ac3558d1d4c15609c364a6e5678ed329fa272",
+        []
+       ],
+       "2d.layer.several-complex-expected.html": [
+        "1944ea6d2ac8f11f3c17d4114070547c5c8ccb73",
+        []
        ]
       },
       "manual": {
@@ -412166,7 +413026,7 @@
         []
        ],
        "layers.yaml": [
-        "51dedfd781326c8bf4f6d57c3bc79e82c95b0703",
+        "6889e164bfb32d860deadde3b4b3e6a3e3dc2352",
         []
        ],
        "line-styles.yaml": [
@@ -417988,6 +418848,10 @@
         []
        ],
        "support": {
+        "link-style.css": [
+         "1024df879206790ce8187926d2cdacd909b0ba26",
+         []
+        ],
         "utils.js": [
          "02d3a095cd18110afa6502346521174d4f2b8402",
          []
@@ -424196,6 +425060,10 @@
       },
       "testdriver": {
        "actions": {
+        "actionsWithKeyPressed.html.ini": [
+         "78bfa5f38a1c501c647c142e03a9586e1c2ed7d4",
+         []
+        ],
         "crossOrigin.sub.html.ini": [
          "c4519f1ee854fc95f1401bbdca80e6d4fbf9307c",
          []
@@ -425934,7 +426802,7 @@
     ]
    },
    "lint.ignore": [
-    "f6776a6617497600fb985d921859e5672f2f8df3",
+    "cddc3203b676f5121d5877364ce25ecfa3821270",
     []
    ],
    "loading": {
@@ -429467,7 +430335,7 @@
      []
     ],
     "pointerevent_support.js": [
-     "a4b7adce3e5305781d6dd1a4194bb811b05af7ba",
+     "f3229b90b6a4a6b8a97ed5a2938a03798bf6e081",
      []
     ],
     "pointerlock": {
@@ -432264,7 +433132,7 @@
       []
      ],
      "mock-direct-sockets.js": [
-      "0752850c8a383353c39320da4dc0d3b3df257129",
+      "e2e02453f7f4d446c528051fc44974878150b809",
       []
      ],
      "mock-facedetection.js": [
@@ -432308,7 +433176,7 @@
       []
      ],
      "nfc-mock.js": [
-      "4796735b1364473e5f2b65dc92b6f588e3a05b4a",
+      "31a71b9e22037f42ade341cfd668b77191576fcd",
       []
      ],
      "web-bluetooth-test.js": [
@@ -436789,12 +437657,16 @@
      []
     ],
     "helpers.js": [
-     "b0f8866f7c68ee047b6590c9b8d6a399592acf7d",
+     "5728d0690d778b666ff661362855b8ca23b73f67",
      []
     ],
     "resources": {
+     "echo-cookie-header.py": [
+      "546e76e509ad2a0b4527ed895b1deb95bfbbf3b4",
+      []
+     ],
      "embedded_responder.js": [
-      "0ff599d0bbe4d1afab068baf35222d397d7016f7",
+      "84358bcdfc226172ece14c4eff6cd2c77e0b833c",
       []
      ],
      "hasStorageAccess-iframe.html": [
@@ -437830,7 +438702,11 @@
        "8d897abee303ea0707c60ef85ebe3b46114e493b",
        []
       ]
-     }
+     },
+     "use-element-transitions-ref.html": [
+      "f564b90de8cd962a19a6205338afdfa9a24e461f",
+      []
+     ]
     },
     "text": {
      "reftests": {
@@ -437839,7 +438715,7 @@
        []
       ],
       "lang-attribute-dynamic-ref.svg": [
-       "191adc036c35242ec88784fe90282078c1ee7cda",
+       "56eebb2f7e44edee0d249a59f23f2ad6e36ce228",
        []
       ],
       "lang-attribute-ref.svg": [
@@ -438669,7 +439545,7 @@
        []
       ],
       "test_manifest.py": [
-       "a7f3d315f0c4eb374467132168cffc1de1f34be3",
+       "5e10d9f06ad50aed7696ba1dcd2bd9c03720e18c",
        []
       ],
       "test_sourcefile.py": [
@@ -446502,7 +447378,7 @@
         []
        ],
        "error.py": [
-        "9e8737e54c774c4e0d04e0ec4a30d0e6f6237883",
+        "1b65d225fae303108d3a1f0462775563172cf04e",
         []
        ],
        "modules": {
@@ -446519,7 +447395,7 @@
          []
         ],
         "script.py": [
-         "d9af11a8e2437a75fc5df37013acfb832fbc6cb1",
+         "a33a9a7b670ba8a50723d4d57fb2659fe240b3e8",
          []
         ],
         "session.py": [
@@ -447667,7 +448543,7 @@
        []
       ],
       "server.py": [
-       "1fac29a6a7fb70f289e3f69f714122555116c27e",
+       "94b70ad93f506659b513b5d4d67a691b5dd1005e",
        []
       ],
       "sslutils": {
@@ -448488,7 +449364,7 @@
       []
      ],
      "setters_tests.json": [
-      "9c4eedc60893edc7adab53d85b88e76fe6b9e5a2",
+      "6cab766eaa3bfdc996e81e70484d4af3ccb8c9a9",
       []
      ],
      "toascii.json": [
@@ -449606,7 +450482,7 @@
     ],
     "resources": {
      "nfc-helpers.js": [
-      "35154e287d8134e5a016b89f8ebfbe7db81748b8",
+      "10229f0b06d968cc82033ef5ad6bda44d449365f",
       []
      ],
      "support-iframe.html": [
@@ -450058,7 +450934,7 @@
     ],
     "resources": {
      "common-inputs.js": [
-      "6fa0005f60fa21a6a12886e188f4d4b197305e98",
+      "e60fed45e8f4d302daa6c229987f30bcb007b387",
       []
      ],
      "utils.js": [
@@ -450463,6 +451339,12 @@
         "51fc26ce56b8348fbe5d2f4ecaeb30dd0c956601",
         []
        ],
+       "add_preload_script": {
+        "__init__.py": [
+         "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
+         []
+        ]
+       },
        "call_function": {
         "__init__.py": [
          "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
@@ -450490,6 +451372,12 @@
          "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
          []
         ]
+       },
+       "remove_preload_script": {
+        "__init__.py": [
+         "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
+         []
+        ]
        }
       },
       "session": {
@@ -450951,7 +451839,7 @@
        []
       ],
       "fixtures_bidi.py": [
-       "7842e325a026ae7b49fbb06609b7b2db078c7038",
+       "6273b8f1575819d6beaef35033a2f326b55b2903",
        []
       ],
       "fixtures_http.py": [
@@ -491159,6 +492047,13 @@
        ]
       ]
      },
+     "sample-on-last-keyframe.html": [
+      "d9dde2e87b997682060a1dbc226f6409ba48623b",
+      [
+       null,
+       {}
+      ]
+     ],
      "style-animation-parsing.html": [
       "792fda33ed8b0bacf355e62066ec05d54cc5c729",
       [
@@ -492656,7 +493551,7 @@
       ]
      ],
      "at-scope-parsing.html": [
-      "13fe94fe8970eac0360c9f3062641d30e4205520",
+      "6fc6ac8528953297f81c45a6aec92c75ec8dc76c",
       [
        null,
        {}
@@ -492924,7 +493819,7 @@
       ]
      ],
      "scope-evaluation.html": [
-      "bd20712c7f26c6edf071c292ef74eca8b58c76c3",
+      "48139d048a05e0552163a59008299cebb78522bc",
       [
        null,
        {}
@@ -492958,6 +493853,13 @@
        {}
       ]
      ],
+     "scope-shadow.html": [
+      "6083e08b4ccaa465ef51f0d08105566ec29d420b",
+      [
+       null,
+       {}
+      ]
+     ],
      "scope-specificity.html": [
       "b39ce9e7b9606094ed93ef99d182f917501bed8a",
       [
@@ -501928,7 +502830,7 @@
        ]
       ],
       "image-set-parsing.html": [
-       "52f99ecf0a5b6a7a51c5967aff393270336a77e1",
+       "477a3f81215c67daeacab8520d79250e5edfd565",
        [
         null,
         {}
@@ -503197,7 +504099,7 @@
        ]
       ],
       "mask-image-interpolation.html": [
-       "beb9c9eaab0344cfdbb61700f52d9ff1f033e148",
+       "ac6b266992d5eafffa8a1195abe8aae0403819b2",
        [
         null,
         {}
@@ -505424,6 +506326,13 @@
         {}
        ]
       ],
+      "custom-property-animation-used-in-shorthand.html": [
+       "63f7fd3fe79bd3f95efe1dc717f0ac5418ad509f",
+       [
+        null,
+        {}
+       ]
+      ],
       "custom-property-transition-angle.html": [
        "974fc6c0db78f6413ef46c7695a33c0ce5e7bc7c",
        [
@@ -512720,6 +513629,13 @@
        {}
       ]
      ],
+     "toggle-aria-roles.tentative.html": [
+      "7c500fde3cbba749442aec9dc197e464c4affc3c",
+      [
+       null,
+       {}
+      ]
+     ],
      "toggle-creation.tentative.html": [
       "583e1631d3c8da97bd8682415507d8c306ec08db",
       [
@@ -521458,7 +522374,7 @@
        {}
       ]
      ],
-     "mq-non-matching-lazy-load.html": [
+     "mq-non-matching-lazy-load.tentative.html": [
       "e0d65e300681512c69713c03c5653cdfeff3efe5",
       [
        null,
@@ -521479,6 +522395,13 @@
        {}
       ]
      ],
+     "overflow-media-features.html": [
+      "fb983318427f33bd8eb5a69f8b7fafeac9874515",
+      [
+       null,
+       {}
+      ]
+     ],
      "prefers-color-scheme.html": [
       "87c5add67ff96dd421b792b4b9b0f10d663b55b7",
       [
@@ -521515,7 +522438,7 @@
       ]
      ],
      "test_media_queries.html": [
-      "6a91c1119ddf7aeccab82bd4dd5c1031c880f896",
+      "fe3ba8195f981572aca7e7f08733d69a5151a7f0",
       [
        null,
        {}
@@ -527433,7 +528356,7 @@
       ]
      ],
      "Node-lookupNamespaceURI.html": [
-      "74c1ac8bd755fbe5388a666954fcf22c4b6665e1",
+      "925c52836214a2552d2a67c6bcfccab52d4b58cb",
       [
        null,
        {}
@@ -528863,6 +529786,13 @@
        "timeout": "long"
       }
      ]
+    ],
+    "xpathevaluatorbase-creatensresolver.html": [
+     "8f6c58fe60acd81d70cd119789c595f77a8eb5f8",
+     [
+      null,
+      {}
+     ]
     ]
    },
    "ecmascript": {
@@ -546829,7 +547759,7 @@
        ]
       ],
       "general.any.js": [
-       "e9e8e93d30f33496e4b04a10c9a8187ea9f7ae9e",
+       "7bf98ba9b247924d1e0c813c8010112d63e965ca",
        [
         "fetch/api/abort/general.any.html",
         {
@@ -558096,6 +559026,42 @@
        }
       ]
      ],
+     "shared-worker-blob-fetch.https.window.js": [
+      "ad9cd09c31b0a7aa83501f44a9e63455696ab9c2",
+      [
+       "fetch/private-network-access/shared-worker-blob-fetch.https.window.html",
+       {
+        "script_metadata": [
+         [
+          "script",
+          "/common/utils.js"
+         ],
+         [
+          "script",
+          "resources/support.sub.js"
+         ]
+        ]
+       }
+      ]
+     ],
+     "shared-worker-blob-fetch.window.js": [
+      "d430ea7383771844bb8955e4c6be23c63e6adc59",
+      [
+       "fetch/private-network-access/shared-worker-blob-fetch.window.html",
+       {
+        "script_metadata": [
+         [
+          "script",
+          "/common/utils.js"
+         ],
+         [
+          "script",
+          "resources/support.sub.js"
+         ]
+        ]
+       }
+      ]
+     ],
      "shared-worker-fetch.https.window.js": [
       "7066b359caa2ddb173a02a359d012456dd7a43a2",
       [
@@ -558197,7 +559163,7 @@
       ]
      ],
      "worker-blob-fetch.window.js": [
-      "80374143a283f42723a48159a72dd1bd715d6ba2",
+      "27cfa155c14cacfd0f25538bf6c25ecef67775b7",
       [
        "fetch/private-network-access/worker-blob-fetch.window.html",
        {
@@ -595844,6 +596810,13 @@
          {}
         ]
        ],
+       "link-stylesheet-with-non-match-media-does-not-block-render.tentative.html": [
+        "7a881bcc3ddb4a7c993d53fa560c9451c717e63a",
+        [
+         null,
+         {}
+        ]
+       ],
        "script-created-link-stylesheet-does-not-block-script.html": [
         "2c27bd32f9405dfb0e3c5a87a560791abf32747a",
         [
@@ -601894,7 +602867,7 @@
         ]
        ],
        "select-event.html": [
-        "c3a65f7302a9dd2f811eb9bd019fb153152c65ba",
+        "5b29ac1d8862806e629a68e1eb6e960cfd62d0d4",
         [
          null,
          {
@@ -604481,7 +605454,7 @@
        ]
       ],
       "popover-attribute-basic.html": [
-       "0abba9c4e87f7a72bc2d54f816851b2228e75d5b",
+       "e9167aaecbfa97b8b803e2b5bce9687919aa760c",
        [
         null,
         {
@@ -604491,7 +605464,7 @@
        ]
       ],
       "popover-beforetoggle-opening-event.html": [
-       "e3597d1c69936435c99c18f8ec8b05c50a4a0149",
+       "41bb9aa82c51ad601cb168faf105b6f5ba50b76b",
        [
         null,
         {}
@@ -604505,7 +605478,7 @@
        ]
       ],
       "popover-events.html": [
-       "1ccd9967c5c9df25ae7995c19c055fdf2a37b82b",
+       "95cd5ad2add38ec28eb1418418c6cb831237c555",
        [
         null,
         {}
@@ -621612,7 +622585,7 @@
      ]
     ],
     "mediasource-remove.html": [
-     "6fea5a3e2e5366da0953d1348ab13a7d06e25877",
+     "64d5a31488b45c2b96b892e5599940fd236f60dc",
      [
       null,
       {}
@@ -631732,7 +632705,7 @@
      ]
     ],
     "pointerevent_auxclick_is_a_pointerevent.html": [
-     "96b232867f0448cadfc43fdf2c730776e53ae6e6",
+     "b3b7481d6ab19cc81688ed6819d81aa16ead35f0",
      [
       "pointerevents/pointerevent_auxclick_is_a_pointerevent.html?mouse",
       {
@@ -631813,7 +632786,7 @@
      ]
     ],
     "pointerevent_click_is_a_pointerevent.html": [
-     "46c1ed4f49c5953cfe1c5ecd461a0eb17fee7d8b",
+     "9e4b023a25af7551e3737eb0d43df4a81b6c1510",
      [
       "pointerevents/pointerevent_click_is_a_pointerevent.html?mouse",
       {
@@ -631862,7 +632835,7 @@
      ]
     ],
     "pointerevent_contextmenu_is_a_pointerevent.html": [
-     "2d64a0d100844ff2c3da3ec08ed0705ad5717198",
+     "fe3a69942ef6338561041d3fdf640dae76958d25",
      [
       "pointerevents/pointerevent_contextmenu_is_a_pointerevent.html?mouse",
       {
@@ -633314,7 +634287,7 @@
      ]
     ],
     "modulepreload.html": [
-     "919762618f38714e2090ecf606ebb159a116c023",
+     "58830fe064b5dfaa25e39d3982723a430dea6f0e",
      [
       null,
       {}
@@ -659715,7 +660688,7 @@
    },
    "storage-access-api": {
     "hasStorageAccess-insecure.sub.window.js": [
-     "74996800df9c27241a7b1750a30880832a256b3e",
+     "2f9f9f4f3890b133bf6a5722035fd58ff5a279e9",
      [
       "storage-access-api/hasStorageAccess-insecure.sub.window.html",
       {
@@ -659729,7 +660702,7 @@
      ]
     ],
     "hasStorageAccess.sub.https.window.js": [
-     "3faf492d13fcf93bbf5ba868c63a0f8a26c921c9",
+     "6cba6f0980a3c5b9cc186a1ee53743327fd4b381",
      [
       "storage-access-api/hasStorageAccess.sub.https.window.html",
       {
@@ -659765,7 +660738,7 @@
      ]
     ],
     "requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.js": [
-     "a469d1b9628194cc25d7ae11da24c91fdb50efa5",
+     "0efbb2f06b3b75f2d9941797972018691de94d02",
      [
       "storage-access-api/requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.html",
       {
@@ -659791,7 +660764,7 @@
      ]
     ],
     "requestStorageAccess-cross-origin-iframe.sub.https.window.js": [
-     "2367afd003da375e6fa9c975b254412ec0012cd0",
+     "9183832957a76703a57eca28c4c18c7bf730112d",
      [
       "storage-access-api/requestStorageAccess-cross-origin-iframe.sub.https.window.html",
       {
@@ -659813,7 +660786,7 @@
      ]
     ],
     "requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.js": [
-     "8da905ae7defeeed5190a2bcb42af5fefe1117f1",
+     "fd82f89f3c97f9a3a6787146f9c73e9660f8be4e",
      [
       "storage-access-api/requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.html",
       {
@@ -659838,8 +660811,30 @@
       }
      ]
     ],
+    "requestStorageAccess-cross-site-iframe.sub.https.window.js": [
+     "53f90de75d06f6bbf95e99bd5ae7da7cd06f7830",
+     [
+      "storage-access-api/requestStorageAccess-cross-site-iframe.sub.https.window.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "helpers.js"
+        ],
+        [
+         "script",
+         "/resources/testdriver.js"
+        ],
+        [
+         "script",
+         "/resources/testdriver-vendor.js"
+        ]
+       ]
+      }
+     ]
+    ],
     "requestStorageAccess-insecure.sub.window.js": [
-     "f845f0647ca001e7a5fe304816a055e2d70c28df",
+     "34d275b5ae88b3017c775a62a03aae16bdc0d18b",
      [
       "storage-access-api/requestStorageAccess-insecure.sub.window.html",
       {
@@ -659861,7 +660856,7 @@
      ]
     ],
     "requestStorageAccess-nested-cross-origin-iframe.sub.https.window.js": [
-     "e79148b4c44eed5e9b2062998a50c8750399a085",
+     "eeac9c2a401722732d819e6732f2bd5022a37096",
      [
       "storage-access-api/requestStorageAccess-nested-cross-origin-iframe.sub.https.window.html",
       {
@@ -659882,8 +660877,30 @@
       }
      ]
     ],
+    "requestStorageAccess-nested-cross-site-iframe.sub.https.window.js": [
+     "59442d97c9385269a2cbf44af88abbd2708ca777",
+     [
+      "storage-access-api/requestStorageAccess-nested-cross-site-iframe.sub.https.window.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "helpers.js"
+        ],
+        [
+         "script",
+         "/resources/testdriver.js"
+        ],
+        [
+         "script",
+         "/resources/testdriver-vendor.js"
+        ]
+       ]
+      }
+     ]
+    ],
     "requestStorageAccess-nested-same-origin-iframe.sub.https.window.js": [
-     "b3847bbc94722cd916a5c2c9aaa25702905da853",
+     "24d82c487f9544f269726899191d5be4d54517eb",
      [
       "storage-access-api/requestStorageAccess-nested-same-origin-iframe.sub.https.window.html",
       {
@@ -659927,7 +660944,7 @@
      ]
     ],
     "requestStorageAccess-same-origin-iframe.sub.https.window.js": [
-     "9c41d6cbbe439b70334a69cc8c747aa3f94536d9",
+     "f406ea1643d9adf4cd14f557703d08600a75c275",
      [
       "storage-access-api/requestStorageAccess-same-origin-iframe.sub.https.window.html",
       {
@@ -659949,7 +660966,7 @@
      ]
     ],
     "requestStorageAccess.sub.https.window.js": [
-     "d673ed306993334e6f2807f3a0ecf8758e8d87ea",
+     "6a9d5f4e57720c2309bd33db48918b77188b6627",
      [
       "storage-access-api/requestStorageAccess.sub.https.window.html",
       {
@@ -659978,7 +660995,7 @@
      ]
     ],
     "storage-access-permission.sub.https.window.js": [
-     "d1ee7700997d66869b7e81664ff4624e89e2989f",
+     "4222051c10bdc1c2ad060d7da1abec0ba6ea2f25",
      [
       "storage-access-api/storage-access-permission.sub.https.window.html",
       {
@@ -660000,7 +661017,7 @@
      ]
     ],
     "storageAccess.testdriver.sub.html": [
-     "27e00b7cd70d5fd197b623dedff6360ab1668f9f",
+     "5282cc8cc186743d195fa66906a8d9c7e8322169",
      [
       null,
       {
@@ -664550,6 +665567,13 @@
        {}
       ]
      ],
+     "animateMotion-from-to-rotate-auto.html": [
+      "faa58fe39b8e2fb5b23688434c04a238c5b4bb4f",
+      [
+       null,
+       {}
+      ]
+     ],
      "animateMotion-keyPoints-001.html": [
       "1397bd6039037f1c8b55685b967042c863a0a705",
       [
@@ -671428,6 +672452,17 @@
       {}
      ]
     ],
+    "urlsearchparams-size.any.js": [
+     "7b3abc7c0b421cdb327921712a965aaaa03278b2",
+     [
+      "url/urlsearchparams-size.any.html",
+      {}
+     ],
+     [
+      "url/urlsearchparams-size.any.worker.html",
+      {}
+     ]
+    ],
     "urlsearchparams-sort.any.js": [
      "4fd8cef69239d26eb6241df180453aedf00cc050",
      [
@@ -680774,7 +681809,7 @@
      ]
     ],
     "createcredential-minpinlength.https.html": [
-     "09b045d448f41fe824c9fc4574c9830e95279c58",
+     "a92898c848c01e5223c462d58c902d4a676bf7f2",
      [
       null,
       {
@@ -681014,7 +682049,7 @@
      ]
     ],
     "webauthn-testdriver-basic.https.html": [
-     "4b8b08d975ebb5ef56c3aa27f2a24e630a500314",
+     "5751928301ff6c75593881f6e0bb0c5f93076d8c",
      [
       null,
       {
@@ -687802,10 +688837,12 @@
      ]
     ],
     "RTCRtpReceiver-getStats.https.html": [
-     "c4a6b4d54abd3e634da2bb8d54ae0bf1155e1403",
+     "3ba6c7127869765e2974bf8c5b2be8678892fe4e",
      [
       null,
-      {}
+      {
+       "timeout": "long"
+      }
      ]
     ],
     "RTCRtpReceiver-getSynchronizationSources.https.html": [
@@ -687834,10 +688871,12 @@
      ]
     ],
     "RTCRtpSender-getStats.https.html": [
-     "70c633232325bc811db6cc0bca6942b5ffbd7ab2",
+     "2b7dbe9e746fc17a8a0c41873762530f141c6322",
      [
       null,
-      {}
+      {
+       "timeout": "long"
+      }
      ]
     ],
     "RTCRtpSender-replaceTrack.https.html": [
@@ -701266,7 +702305,7 @@
      ]
     ],
     "constructor.https.any.js": [
-     "4312eb32857b621e7d855bbe1998d7e8d53906f7",
+     "acb91d84aae34844842a87adabd5adb13dce0c6b",
      [
       "webtransport/constructor.https.any.html",
       {
@@ -732934,6 +733973,29 @@
        }
       },
       "script": {
+       "add_preload_script": {
+        "add_preload_script_tentative.py": [
+         "98c01554ee0ba99774bff205c962568b8d226878",
+         [
+          null,
+          {}
+         ]
+        ],
+        "invalid_tentative.py": [
+         "6a87d5c2fa7a5c1423be24d43255cd5fd10dbee1",
+         [
+          null,
+          {}
+         ]
+        ],
+        "sandbox_tentative.py": [
+         "364eb5ce1a35e8a7ba908a54bb11e7dc9a742edd",
+         [
+          null,
+          {}
+         ]
+        ]
+       },
        "call_function": {
         "arguments.py": [
          "9fbe5fb81101054f9cafe1411a6c9a5937473324",
@@ -732999,7 +734061,7 @@
          ]
         ],
         "result_node.py": [
-         "c7ec990ba5c15c9f48975091ff5189c843d5d50e",
+         "08e47be5f714de3a53d39c0dfec45a4d6827fb5a",
          [
           null,
           {}
@@ -733115,7 +734177,7 @@
          ]
         ],
         "result_node.py": [
-         "d3eccc2fdad42e823ed8eb13edd2a97527fc45a9",
+         "0d0589a5f3816e4aa64aa275360bee0ee76c5958",
          [
           null,
           {}
@@ -733179,6 +734241,29 @@
           {}
          ]
         ]
+       },
+       "remove_preload_script": {
+        "invalid_tentative.py": [
+         "f32c5f57cac33c3b367e4b61a7d85def0c08321a",
+         [
+          null,
+          {}
+         ]
+        ],
+        "remove_preload_script_tentative.py": [
+         "b92fb31af0418755ada7b9bd516150744dfacdb4",
+         [
+          null,
+          {}
+         ]
+        ],
+        "sandbox_tentative.py": [
+         "32befe7f057a0faadd402ee026fd219d3f495615",
+         [
+          null,
+          {}
+         ]
+        ]
        }
       },
       "session": {
@@ -733777,7 +734862,7 @@
      },
      "get_active_element": {
       "get.py": [
-       "2b79ebd58485156573d5369372bfe6a8a1587a9f",
+       "1d2960c88c5f587bf2dea86f5b97ad1e5fae9b5c",
        [
         null,
         {}
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini
new file mode 100644
index 0000000000000..0842d0b57273d
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-001.html]
+  [hit-test-floats-001]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/linebox/inline-negative-margin-001.html.ini b/tests/wpt/metadata/css/CSS2/linebox/inline-negative-margin-001.html.ini
index a057f03833972..5e3a96e59990f 100644
--- a/tests/wpt/metadata/css/CSS2/linebox/inline-negative-margin-001.html.ini
+++ b/tests/wpt/metadata/css/CSS2/linebox/inline-negative-margin-001.html.ini
@@ -8,8 +8,5 @@
   [[data-expected-height\] 3]
     expected: FAIL
 
-  [[data-expected-height\] 1]
-    expected: FAIL
-
-  [[data-expected-height\] 2]
+  [[data-expected-height\] 4]
     expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini
new file mode 100644
index 0000000000000..7c07b71d77c4b
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini
@@ -0,0 +1,3 @@
+[hit-test-anonymous-block.html]
+  [Hit test beside line of text inside anonymous block]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/positioning/absolute-replaced-width-036.xht.ini b/tests/wpt/metadata/css/CSS2/positioning/absolute-replaced-width-036.xht.ini
new file mode 100644
index 0000000000000..457f7674aa899
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/positioning/absolute-replaced-width-036.xht.ini
@@ -0,0 +1,2 @@
+[absolute-replaced-width-036.xht]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/css/css-animations/sample-on-last-keyframe.html.ini b/tests/wpt/metadata/css/css-animations/sample-on-last-keyframe.html.ini
new file mode 100644
index 0000000000000..1fba8f5e439a4
--- /dev/null
+++ b/tests/wpt/metadata/css/css-animations/sample-on-last-keyframe.html.ini
@@ -0,0 +1,3 @@
+[sample-on-last-keyframe.html]
+  [Opacity at start of reverse running animation]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
index b7824b5998fd8..730bec158058c 100644
--- a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
@@ -1,6 +1,5 @@
 [at-font-face-font-matching.html]
   bug: https://github.com/servo/servo/issues/29376
-
   [Descriptor mathcing priority: Stretch has higher priority than style]
     expected: [PASS, FAIL]
 
diff --git a/tests/wpt/metadata/css/css-images/image-set/image-set-parsing.html.ini b/tests/wpt/metadata/css/css-images/image-set/image-set-parsing.html.ini
index 043fd47a676fc..9da0a1ece6174 100644
--- a/tests/wpt/metadata/css/css-images/image-set/image-set-parsing.html.ini
+++ b/tests/wpt/metadata/css/css-images/image-set/image-set-parsing.html.ini
@@ -193,3 +193,69 @@
 
   [e.style['content'\] = "-webkit-image-set(linear-gradient(black, white) 1x, url(\\"example.png\\") 4x)" should set the property value]
     expected: FAIL
+
+  [e.style['content'\] = "image-set(url(\\"example.png\\") 1x)" should set the property value]
+    expected: FAIL
+
+  [e.style['content'\] = "-webkit-image-set(url(\\"example.png\\") 1x)" should set the property value]
+    expected: FAIL
+
+  [e.style['content'\] = "image-set(url(\\"example.png\\") 1x, \\"example.png\\" 3x)" should set the property value]
+    expected: FAIL
+
+  [e.style['content'\] = "-webkit-image-set(url(\\"example.png\\") 1x, \\"example.png\\" 3x)" should set the property value]
+    expected: FAIL
+
+  [e.style['border-image-source'\] = "image-set(url(\\"example.png\\") 1x)" should set the property value]
+    expected: FAIL
+
+  [e.style['border-image-source'\] = "-webkit-image-set(url(\\"example.png\\") 1x)" should set the property value]
+    expected: FAIL
+
+  [e.style['border-image-source'\] = "image-set(url(\\"example.png\\") 1x, \\"example.png\\" 3x)" should set the property value]
+    expected: FAIL
+
+  [e.style['border-image-source'\] = "-webkit-image-set(url(\\"example.png\\") 1x, \\"example.png\\" 3x)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(\\"example.png\\") calc(2x * 3))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(\\"example.png\\") calc(2x * 3))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(\\"example.png\\") calc(1dppx * 1))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(\\"example.png\\") calc(1dppx * 1))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(\\"example.png\\") calc(96dpi * 2))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(\\"example.png\\") calc(96dpi * 2))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(\\"example.png\\") calc(1dpcm * 96/2.54))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(\\"example.png\\") calc(1dpcm * 96/2.54))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(\\"example.png\\") 1x, url(\\"example.png\\") 2dppx, \\"example.png\\" 250dpi, \\"example.png\\" 1dpcm)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(\\"example.png\\") 1x, url(\\"example.png\\") 2dppx, \\"example.png\\" 250dpi, \\"example.png\\" 1dpcm)" should set the property value]
+    expected: FAIL
+
+  [e.style['content'\] = "image-set(url(\\"example.png\\") calc(1 * 96dpi))" should set the property value]
+    expected: FAIL
+
+  [e.style['content'\] = "-webkit-image-set(url(\\"example.png\\") calc(1 * 96dpi))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "image-set(url(example.png) 1x type('image/jpeg'))" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "-webkit-image-set(url(example.png) 1x type('image/jpeg'))" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-2.html.ini b/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-2.html.ini
deleted file mode 100644
index 2a64df11b9a5d..0000000000000
--- a/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-2.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[segment-break-transformation-unremovable-2.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-3.html.ini b/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-3.html.ini
deleted file mode 100644
index 95a0a20ba63a2..0000000000000
--- a/tests/wpt/metadata/css/css-text/line-breaking/segment-break-transformation-unremovable-3.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[segment-break-transformation-unremovable-3.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-text/white-space/trailing-space-position-001.html.ini b/tests/wpt/metadata/css/css-text/white-space/trailing-space-position-001.html.ini
index ad3b251437e14..2a6a9ba5a81f0 100644
--- a/tests/wpt/metadata/css/css-text/white-space/trailing-space-position-001.html.ini
+++ b/tests/wpt/metadata/css/css-text/white-space/trailing-space-position-001.html.ini
@@ -4,6 +4,3 @@
 
   [CSS Test: Positions of trailing collapsible spaces 2]
     expected: FAIL
-
-  [CSS Test: Positions of trailing collapsible spaces 4]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
index 92897c80669e2..6229b554d51de 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
@@ -1,6 +1,5 @@
 [properties-value-001.html]
   bug: https://github.com/servo/servo/issues/21486
-
   [background-position length(pt) / values]
     expected: [FAIL, PASS]
 
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-002.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-002.html.ini
index f7ff822fc8962..efbe92d06507d 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-002.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-002.html.ini
@@ -1,6 +1,5 @@
 [properties-value-002.html]
   bug: https://github.com/servo/servo/issues/21486
-
   [vertical-align vertical(keyword) / values]
     expected: [FAIL, PASS]
 
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
index 2fb5b51c25b83..ecde22ab2989d 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
@@ -1,6 +1,5 @@
 [properties-value-inherit-001.html]
   bug: https://github.com/servo/servo/issues/21486
-
   [background-position length(pt) / values]
     expected: [FAIL, PASS]
 
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
index 789577b9d7cb4..25cee5c527d2f 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
@@ -1,6 +1,5 @@
 [properties-value-inherit-002.html]
   bug: https://github.com/servo/servo/issues/21486
-
   [background-position length(pt) / values]
     expected: [FAIL, PASS]
 
@@ -327,3 +326,153 @@
 
   [margin-right length(mm) / values]
     expected: [FAIL, PASS]
+
+  [color color(rgba) / values]
+    expected: FAIL
+
+  [font-size length(pt) / values]
+    expected: FAIL
+
+  [font-size length(pc) / values]
+    expected: FAIL
+
+  [font-size length(px) / values]
+    expected: FAIL
+
+  [font-size length(em) / values]
+    expected: FAIL
+
+  [font-size length(ex) / values]
+    expected: FAIL
+
+  [font-size length(mm) / values]
+    expected: FAIL
+
+  [font-size length(cm) / values]
+    expected: FAIL
+
+  [font-size length(in) / values]
+    expected: FAIL
+
+  [font-size percentage(%) / values]
+    expected: FAIL
+
+  [font-weight font-weight(keyword) / values]
+    expected: FAIL
+
+  [font-weight font-weight(numeric) / values]
+    expected: FAIL
+
+  [line-height number(integer) / values]
+    expected: FAIL
+
+  [line-height number(decimal) / values]
+    expected: FAIL
+
+  [line-height length(pt) / values]
+    expected: FAIL
+
+  [line-height length(pc) / values]
+    expected: FAIL
+
+  [line-height length(px) / values]
+    expected: FAIL
+
+  [line-height length(em) / values]
+    expected: FAIL
+
+  [line-height length(ex) / values]
+    expected: FAIL
+
+  [line-height length(mm) / values]
+    expected: FAIL
+
+  [line-height length(cm) / values]
+    expected: FAIL
+
+  [line-height length(in) / values]
+    expected: FAIL
+
+  [line-height percentage(%) / values]
+    expected: FAIL
+
+  [letter-spacing length(pt) / values]
+    expected: FAIL
+
+  [letter-spacing length(pc) / values]
+    expected: FAIL
+
+  [letter-spacing length(px) / values]
+    expected: FAIL
+
+  [letter-spacing length(em) / values]
+    expected: FAIL
+
+  [letter-spacing length(ex) / values]
+    expected: FAIL
+
+  [letter-spacing length(mm) / values]
+    expected: FAIL
+
+  [letter-spacing length(cm) / values]
+    expected: FAIL
+
+  [letter-spacing length(in) / values]
+    expected: FAIL
+
+  [word-spacing length(pt) / values]
+    expected: FAIL
+
+  [word-spacing length(pc) / values]
+    expected: FAIL
+
+  [word-spacing length(px) / values]
+    expected: FAIL
+
+  [word-spacing length(em) / values]
+    expected: FAIL
+
+  [word-spacing length(ex) / values]
+    expected: FAIL
+
+  [word-spacing length(mm) / values]
+    expected: FAIL
+
+  [word-spacing length(cm) / values]
+    expected: FAIL
+
+  [word-spacing length(in) / values]
+    expected: FAIL
+
+  [word-spacing percentage(%) / values]
+    expected: FAIL
+
+  [text-indent length(pt) / values]
+    expected: FAIL
+
+  [text-indent length(pc) / values]
+    expected: FAIL
+
+  [text-indent length(px) / values]
+    expected: FAIL
+
+  [text-indent length(em) / values]
+    expected: FAIL
+
+  [text-indent length(ex) / values]
+    expected: FAIL
+
+  [text-indent length(mm) / values]
+    expected: FAIL
+
+  [text-indent length(cm) / values]
+    expected: FAIL
+
+  [text-indent length(in) / values]
+    expected: FAIL
+
+  [text-indent percentage(%) / values]
+    expected: FAIL
+
+  [text-shadow shadow(shadow) / values]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
deleted file mode 100644
index f18b8d2fcf90f..0000000000000
--- a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[CaretPosition-001.html]
-  [Element at (400, 100)]
-    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 72b0937103825..0000000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-001.html]
-  [CSSOM View - 5 - extensions to the Document interface]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini
new file mode 100644
index 0000000000000..db0655883084e
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-float-in-table.html]
+  [float-in-div]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
index 8425141b73654..8ae9bae350077 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
@@ -13,6 +13,3 @@
 
   [<li>Outside 3</li>]
     expected: FAIL
-
-  [<li>Inside 2</li>]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
deleted file mode 100644
index a6bca7ac372d3..0000000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-visibility-hidden-resizer.html]
-  [elementFromPoint on resizer area of an element with visibility:hidden]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
new file mode 100644
index 0000000000000..3e7b0a9bc9c5a
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-iframes.html.ini
@@ -0,0 +1,3 @@
+[elementsFromPoint-iframes.html]
+  [elementsFromPoint on inner documents]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.html.ini b/tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.tentative.html.ini
similarity index 70%
rename from tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.html.ini
rename to tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.tentative.html.ini
index e94efaed16ccd..d525f32fb4d2c 100644
--- a/tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.html.ini
+++ b/tests/wpt/metadata/css/mediaqueries/mq-non-matching-lazy-load.tentative.html.ini
@@ -1,3 +1,3 @@
-[mq-non-matching-lazy-load.html]
+[mq-non-matching-lazy-load.tentative.html]
   [Ensure browser renders the page without waiting for non matching @import style]
     expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/overflow-media-features.html.ini b/tests/wpt/metadata/css/mediaqueries/overflow-media-features.html.ini
new file mode 100644
index 0000000000000..03522d101751b
--- /dev/null
+++ b/tests/wpt/metadata/css/mediaqueries/overflow-media-features.html.ini
@@ -0,0 +1,45 @@
+[overflow-media-features.html]
+  [Should be known: '(overflow-inline)']
+    expected: FAIL
+
+  [Should be known: '(overflow-inline: none)']
+    expected: FAIL
+
+  [Should be known: '(overflow-inline: scroll)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-inline: ?)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-inline: 10px)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-inline: 0)']
+    expected: FAIL
+
+  [Should be known: '(overflow-block)']
+    expected: FAIL
+
+  [Should be known: '(overflow-block: none)']
+    expected: FAIL
+
+  [Should be known: '(overflow-block: scroll)']
+    expected: FAIL
+
+  [Should be known: '(overflow-block: paged)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-block: ?)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-block: 10px)']
+    expected: FAIL
+
+  [Should be parseable: '(overflow-block: 0)']
+    expected: FAIL
+
+  [Check that overflow-inline: scroll always matches non printing documents]
+    expected: FAIL
+
+  [Check that overflow-block: scroll always matches non printing documents]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/test_media_queries.html.ini b/tests/wpt/metadata/css/mediaqueries/test_media_queries.html.ini
index 786d117e2ece9..fd0f36ba67699 100644
--- a/tests/wpt/metadata/css/mediaqueries/test_media_queries.html.ini
+++ b/tests/wpt/metadata/css/mediaqueries/test_media_queries.html.ini
@@ -4396,3 +4396,9 @@
 
   [three-valued logic: should_not_apply: not (unknown(width) or (height))]
     expected: FAIL
+
+  [expression_should_be_parseable: overflow-block: optional-paged]
+    expected: FAIL
+
+  [expression_should_be_unknown: overflow-block: optional-paged]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-containing-ancestor.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-containing-ancestor.html.ini
new file mode 100644
index 0000000000000..d7b5988f02170
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-containing-ancestor.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-containing-ancestor.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-in-shadow-root.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-in-shadow-root.html.ini
new file mode 100644
index 0000000000000..b50360e1a4add
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-in-shadow-root.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-in-shadow-root.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-attr.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-attr.html.ini
new file mode 100644
index 0000000000000..57a785714ee22
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-attr.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-of-attr.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-class.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-class.html.ini
new file mode 100644
index 0000000000000..e84f9e706446c
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-class.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-of-class.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-has.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-has.html.ini
new file mode 100644
index 0000000000000..a07aa32610f36
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-has.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-of-has.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-in-ancestor.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-in-ancestor.html.ini
new file mode 100644
index 0000000000000..8120ef6c17d03
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-in-ancestor.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-of-in-ancestor.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-sibling.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-sibling.html.ini
new file mode 100644
index 0000000000000..b190d528617b0
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-of-sibling.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-of-sibling.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html.ini
new file mode 100644
index 0000000000000..bb127897124b4
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-when-ancestor-changes.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-sibling-changes.html.ini b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-sibling-changes.html.ini
new file mode 100644
index 0000000000000..68b9a49417b2b
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/invalidation/nth-last-child-when-sibling-changes.html.ini
@@ -0,0 +1,2 @@
+[nth-last-child-when-sibling-changes.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/dom/nodes/Node-lookupNamespaceURI.html.ini b/tests/wpt/metadata/dom/nodes/Node-lookupNamespaceURI.html.ini
new file mode 100644
index 0000000000000..d78d197f705da
--- /dev/null
+++ b/tests/wpt/metadata/dom/nodes/Node-lookupNamespaceURI.html.ini
@@ -0,0 +1,18 @@
+[Node-lookupNamespaceURI.html]
+  [Element should have XML namespace]
+    expected: FAIL
+
+  [Element should have XMLNS namespace]
+    expected: FAIL
+
+  [Element should have namespace with xmlns prefix]
+    expected: FAIL
+
+  [Child element should have XMLNS namespace]
+    expected: FAIL
+
+  [Connected Attr has namespace URI matching "xml"]
+    expected: FAIL
+
+  [Connected Attr no namespace URI matching "xmlns"]
+    expected: FAIL
diff --git a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
index 2c8b2db082a56..741af78eff85b 100644
--- a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -147,5 +147,8 @@
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
 
-  [border-image sec-fetch-user - Not sent to non-trustworthy same-site destination]
+  [background-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: TIMEOUT
+
+  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
     expected: FAIL
diff --git a/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.https.window.js.ini b/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.https.window.js.ini
new file mode 100644
index 0000000000000..2761ecc3254ce
--- /dev/null
+++ b/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.https.window.js.ini
@@ -0,0 +1,43 @@
+[shared-worker-blob-fetch.https.window.html]
+  expected: TIMEOUT
+  [local to local: success.]
+    expected: TIMEOUT
+
+  [private to local: failed preflight.]
+    expected: NOTRUN
+
+  [private to local: success.]
+    expected: NOTRUN
+
+  [private to private: success.]
+    expected: NOTRUN
+
+  [public to local: failed preflight.]
+    expected: NOTRUN
+
+  [public to local: success.]
+    expected: NOTRUN
+
+  [public to private: failed preflight.]
+    expected: NOTRUN
+
+  [public to private: success.]
+    expected: NOTRUN
+
+  [public to public: success.]
+    expected: NOTRUN
+
+  [treat-as-public to local: failed preflight.]
+    expected: NOTRUN
+
+  [treat-as-public to local: success.]
+    expected: NOTRUN
+
+  [treat-as-public to private: failed preflight.]
+    expected: NOTRUN
+
+  [treat-as-public to private: success.]
+    expected: NOTRUN
+
+  [treat-as-public to public: success.]
+    expected: NOTRUN
diff --git a/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.window.js.ini b/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.window.js.ini
new file mode 100644
index 0000000000000..4a32995af789a
--- /dev/null
+++ b/tests/wpt/metadata/fetch/private-network-access/shared-worker-blob-fetch.window.js.ini
@@ -0,0 +1,46 @@
+[shared-worker-blob-fetch.window.html]
+  expected: TIMEOUT
+  [local to local: success.]
+    expected: TIMEOUT
+
+  [private to local: failure.]
+    expected: NOTRUN
+
+  [private to private: success.]
+    expected: NOTRUN
+
+  [public to local: failure.]
+    expected: NOTRUN
+
+  [public to private: failure.]
+    expected: NOTRUN
+
+  [public to public: success.]
+    expected: NOTRUN
+
+  [treat-as-public to local: failure.]
+    expected: NOTRUN
+
+  [treat-as-public to private: failure.]
+    expected: NOTRUN
+
+  [treat-as-public to public: success.]
+    expected: NOTRUN
+
+  [local https to local: success.]
+    expected: NOTRUN
+
+  [private https to local: failure.]
+    expected: NOTRUN
+
+  [public https to local: failure.]
+    expected: NOTRUN
+
+  [local https to local https: success.]
+    expected: NOTRUN
+
+  [private https to local https: failure.]
+    expected: NOTRUN
+
+  [public https to local https: failure.]
+    expected: NOTRUN
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
index 6e9f7acf151bf..c8a3c8f9e680c 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
@@ -1,6 +1,6 @@
 [scroll-restoration-fragment-scrolling-cross-origin.html]
   type: testharness
-  expected: TIMEOUT
+  expected: ERROR
   [Manual scroll restoration should take precedent over scrolling to fragment in cross origin navigation]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
index 856bb1c99012e..dc1144214ef38 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
@@ -1,10 +1,9 @@
 [iframe-src-aboutblank-navigate-immediately.html]
-  expected: TIMEOUT
   [Navigating to a different document with window.open]
     expected: FAIL
 
   [Navigating to a different document with form submission]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Navigating to a different document with link click]
     expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index 149bcb4ff8cea..51fd557bd7fb7 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -7,6 +7,3 @@
 
   [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank#foo']
     expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
index 5aef7ce66ce21..324db3d9b355a 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
@@ -10,6 +10,3 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
deleted file mode 100644
index 4ecd6d9f75330..0000000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[navigation-unload-cross-origin.sub.window.html]
-  [Cross-origin navigation started from unload handler must be ignored]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
deleted file mode 100644
index 7dc346632a4f7..0000000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[navigation-unload-same-origin.window.html]
-  [Same-origin navigation started from unload handler must be ignored]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
index f49298fea1fca..d993e8dcc4276 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
@@ -1,4 +1,3 @@
 [pageload-image-in-popup.html]
-  expected: TIMEOUT
   [The document for a standalone media file should have one child in the body.]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse-during-unload.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse-during-unload.html.ini
new file mode 100644
index 0000000000000..f5b7b25324f29
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse-during-unload.html.ini
@@ -0,0 +1,4 @@
+[traverse-during-unload.html]
+  expected: TIMEOUT
+  [Traversing the history during unload]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/element/layers/2d.layer.restore-style.html.ini b/tests/wpt/metadata/html/canvas/element/layers/2d.layer.restore-style.html.ini
new file mode 100644
index 0000000000000..1fef32a52e7b8
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/element/layers/2d.layer.restore-style.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.restore-style.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/element/manual/layers/layers-restorestyle.html.ini b/tests/wpt/metadata/html/canvas/element/manual/layers/layers-restorestyle.html.ini
deleted file mode 100644
index 18101454baddb..0000000000000
--- a/tests/wpt/metadata/html/canvas/element/manual/layers/layers-restorestyle.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[layers-restorestyle.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html.ini
new file mode 100644
index 0000000000000..8707ec46c87b9
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.endlayer.alone.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html.ini
new file mode 100644
index 0000000000000..9634b39bdeaa6
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.endlayer.alone.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html.ini
new file mode 100644
index 0000000000000..3159d54e5d5d4
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.endlayer.unmatched.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html.ini
new file mode 100644
index 0000000000000..842409080a78a
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.endlayer.unmatched.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html.ini
new file mode 100644
index 0000000000000..889cd6eac8a92
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.global-states.no_global_states.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.nested.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.nested.w.html.ini
new file mode 100644
index 0000000000000..a4851380e866d
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.nested.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.nested.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.html.ini
new file mode 100644
index 0000000000000..1fef32a52e7b8
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.restore-style.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.w.html.ini
new file mode 100644
index 0000000000000..2e8a9f3e044df
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.restore-style.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.restore-style.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.html.ini
new file mode 100644
index 0000000000000..b6ea74153f738
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.several-complex.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.w.html.ini b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.w.html.ini
new file mode 100644
index 0000000000000..361660b792c0a
--- /dev/null
+++ b/tests/wpt/metadata/html/canvas/offscreen/layers/2d.layer.several-complex.w.html.ini
@@ -0,0 +1,2 @@
+[2d.layer.several-complex.w.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
index 8a92620763056..8690f05521213 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@@ -7,10 +7,10 @@
     expected: FAIL
 
   [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [Area element should support autofocus]
     expected: NOTRUN
 
   [Host element with delegatesFocus should support autofocus]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/update-the-rendering.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/update-the-rendering.html.ini
index add66c12f9288..9b27c5c195742 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/update-the-rendering.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/update-the-rendering.html.ini
@@ -1,6 +1,7 @@
 [update-the-rendering.html]
+  expected: TIMEOUT
   ["Flush autofocus candidates" should be happen after the first animation frame callbacks, and before a resize event in the next iteration of window event loop.]
     expected: TIMEOUT
 
   ["Flush autofocus candidates" should be happen before a scroll event and animation frame callbacks]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html.ini b/tests/wpt/metadata/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html.ini
new file mode 100644
index 0000000000000..9d0ab0139811e
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html.ini
@@ -0,0 +1,3 @@
+[link-stylesheet-with-non-match-media-does-not-block-render.tentative.html]
+  [\n  Delayed Stylesheet imported using link tag should not block rendering\n  or JS execution when media doesn't match.\n]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index eacbe5794eaed..fe55ddae3f1a6 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_escaping-3.html]
   type: testharness
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index ff0e825b9a1ca..76e34322dca91 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-2.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index 3cdeb8ebcbccd..47b45e65a1c46 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,3 +1,9 @@
 [non-active-document.html]
   [DOMParser]
     expected: FAIL
+
+  [createHTMLDocument]
+    expected: FAIL
+
+  [<template>]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini b/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
deleted file mode 100644
index f0dc6efa9b720..0000000000000
--- a/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[select-event.html]
-  [input type text: selectionEnd a second time (must not fire select)]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
index 73807cb3cc1c9..cc18f51257436 100644
--- a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
+++ b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
@@ -1,6 +1,5 @@
 [htmlanchorelement_noopener.html]
   type: testharness
-  expected: TIMEOUT
   [Check that targeting of rel=noopener with a given name ignores an existing window with that name]
     expected: NOTRUN
 
@@ -14,4 +13,4 @@
     expected: FAIL
 
   [Check that rel=noopener with target=_self does a normal load]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
new file mode 100644
index 0000000000000..f9a4f08cd703b
--- /dev/null
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
@@ -0,0 +1,3 @@
+[module-tla-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
index e55f8f2ce3c53..8845054116d6d 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@@ -3,6 +3,3 @@
   expected: TIMEOUT
   [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
     expected: TIMEOUT
-
-  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
index 1d71471b73cee..4a48dd15a9dae 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
@@ -1,7 +1,6 @@
 [promise-rejection-events.html]
-  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: TIMEOUT
+    expected: FAIL
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata/url/url-setters-a-area.window.js.ini b/tests/wpt/metadata/url/url-setters-a-area.window.js.ini
index 183cfcd5002e4..a2e634189dbf9 100644
--- a/tests/wpt/metadata/url/url-setters-a-area.window.js.ini
+++ b/tests/wpt/metadata/url/url-setters-a-area.window.js.ini
@@ -1336,6 +1336,12 @@
   [<area>: Setting <http://test/>.protocol = 'https\x0e']
     expected: FAIL
 
+  [<a>: Setting <http://example.net:8080/path>.port = 'randomstring' Setting port to a string that doesn't parse as a number]
+    expected: FAIL
+
+  [<area>: Setting <http://example.net:8080/path>.port = 'randomstring' Setting port to a string that doesn't parse as a number]
+    expected: FAIL
+
 
 [url-setters-a-area.window.html?include=mailto]
   [<area>: Setting <mailto:me@example.net>.protocol = 'http' Cannot-be-a-base URL doesn’t have a host, but URL in a special scheme must.]
diff --git a/tests/wpt/metadata/url/url-setters.any.js.ini b/tests/wpt/metadata/url/url-setters.any.js.ini
index 90ca360575e62..9cddff65a1d2b 100644
--- a/tests/wpt/metadata/url/url-setters.any.js.ini
+++ b/tests/wpt/metadata/url/url-setters.any.js.ini
@@ -123,6 +123,9 @@
   [URL: Setting <http://test/>.protocol = 'https\x0e']
     expected: FAIL
 
+  [URL: Setting <http://example.net:8080/path>.port = 'randomstring' Setting port to a string that doesn't parse as a number]
+    expected: FAIL
+
 
 [url-setters.any.html?include=javascript]
 
@@ -205,3 +208,6 @@
 
   [URL: Setting <http://test/>.protocol = 'https\x0e']
     expected: FAIL
+
+  [URL: Setting <http://example.net:8080/path>.port = 'randomstring' Setting port to a string that doesn't parse as a number]
+    expected: FAIL
diff --git a/tests/wpt/metadata/url/urlsearchparams-size.any.js.ini b/tests/wpt/metadata/url/urlsearchparams-size.any.js.ini
new file mode 100644
index 0000000000000..754b3ca020183
--- /dev/null
+++ b/tests/wpt/metadata/url/urlsearchparams-size.any.js.ini
@@ -0,0 +1,26 @@
+[urlsearchparams-size.any.worker.html]
+  [URLSearchParams's size and deletion]
+    expected: FAIL
+
+  [URLSearchParams's size and addition]
+    expected: FAIL
+
+  [URLSearchParams's size when obtained from a URL]
+    expected: FAIL
+
+  [URLSearchParams's size when obtained from a URL and using .search]
+    expected: FAIL
+
+
+[urlsearchparams-size.any.html]
+  [URLSearchParams's size and deletion]
+    expected: FAIL
+
+  [URLSearchParams's size and addition]
+    expected: FAIL
+
+  [URLSearchParams's size when obtained from a URL]
+    expected: FAIL
+
+  [URLSearchParams's size when obtained from a URL and using .search]
+    expected: FAIL
diff --git a/tests/wpt/metadata/wasm/jsapi/functions/entry.html.ini b/tests/wpt/metadata/wasm/jsapi/functions/entry.html.ini
index 2ab1955872680..145d4a8fe375b 100644
--- a/tests/wpt/metadata/wasm/jsapi/functions/entry.html.ini
+++ b/tests/wpt/metadata/wasm/jsapi/functions/entry.html.ini
@@ -1,7 +1,6 @@
 [entry.html]
-  expected: TIMEOUT
   [Start function]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Sanity check: this all works as expected synchronously]
     expected: FAIL
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
similarity index 100%
rename from tests/wpt/metadata/webmessaging/without-ports/017.html.ini
rename to tests/wpt/metadata/webmessaging/with-ports/017.html.ini
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
similarity index 100%
rename from tests/wpt/metadata/webmessaging/without-ports/018.html.ini
rename to tests/wpt/metadata/webmessaging/with-ports/018.html.ini
diff --git a/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini b/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
deleted file mode 100644
index aa6c9e5b826a6..0000000000000
--- a/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html]
-  expected: TIMEOUT
-  [StorageKey: test 3P about:blank window opened from a 3P iframe]
-    expected: TIMEOUT
diff --git a/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini b/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini
deleted file mode 100644
index 6ef3d27697441..0000000000000
--- a/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[task_queue_throttling.any.html]
-  [Throttling the performance timeline task queue.]
-    expected: FAIL
-
-
-[task_queue_throttling.any.worker.html]
diff --git a/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js b/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
index d0f88f170107b..96ca280597bf2 100644
--- a/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
+++ b/tests/wpt/web-platform-tests/common/security-features/resources/common.sub.js
@@ -485,9 +485,13 @@ function dedicatedWorkerUrlThatFetches(url) {
       .catch((e) => postMessage(e.message));`;
 }
 
-function workerUrlThatImports(url) {
+function workerUrlThatImports(url, additionalAttributes) {
+  let csp = "";
+  if (additionalAttributes && additionalAttributes.contentSecurityPolicy) {
+    csp=`&contentSecurityPolicy=${additionalAttributes.contentSecurityPolicy}`;
+  }
   return `/common/security-features/subresource/static-import.py` +
-      `?import_url=${encodeURIComponent(url)}`;
+      `?import_url=${encodeURIComponent(url)}${csp}`;
 }
 
 function workerDataUrlThatImports(url) {
@@ -907,8 +911,8 @@ const subresourceMap = {
   },
   "worker-import": {
     path: "/common/security-features/subresource/worker.py",
-    invoker: url =>
-        requestViaDedicatedWorker(workerUrlThatImports(url), {type: "module"}),
+    invoker: (url, additionalAttributes) =>
+        requestViaDedicatedWorker(workerUrlThatImports(url, additionalAttributes), {type: "module"}),
   },
   "worker-import-data": {
     path: "/common/security-features/subresource/worker.py",
@@ -925,8 +929,8 @@ const subresourceMap = {
   },
   "sharedworker-import": {
     path: "/common/security-features/subresource/shared-worker.py",
-    invoker: url =>
-        requestViaSharedWorker(workerUrlThatImports(url), {type: "module"}),
+    invoker: (url, additionalAttributes) =>
+        requestViaSharedWorker(workerUrlThatImports(url, additionalAttributes), {type: "module"}),
   },
   "sharedworker-import-data": {
     path: "/common/security-features/subresource/shared-worker.py",
@@ -1109,6 +1113,10 @@ function invokeRequest(subresource, sourceContextList) {
         additionalAttributes[policyDelivery.key] = policyDelivery.value;
       } else if (policyDelivery.deliveryType === "rel-noref") {
         additionalAttributes["rel"] = "noreferrer";
+      } else if (policyDelivery.deliveryType === "http-rp") {
+        additionalAttributes[policyDelivery.key] = policyDelivery.value;
+      } else if (policyDelivery.deliveryType === "meta") {
+        additionalAttributes[policyDelivery.key] = policyDelivery.value;
       }
     }
 
diff --git a/tests/wpt/web-platform-tests/common/security-features/subresource/static-import.py b/tests/wpt/web-platform-tests/common/security-features/subresource/static-import.py
index 717d3de6b186b..3c3a6f6871d32 100644
--- a/tests/wpt/web-platform-tests/common/security-features/subresource/static-import.py
+++ b/tests/wpt/web-platform-tests/common/security-features/subresource/static-import.py
@@ -1,10 +1,47 @@
-import os, sys
+import os, sys, json
 from urllib.parse import unquote
 
 from wptserve.utils import isomorphic_decode
 import importlib
 subresource = importlib.import_module("common.security-features.subresource.subresource")
 
+def get_csp_value(value):
+    '''
+    Returns actual CSP header values (e.g. "worker-src 'self'") for the
+    given string used in PolicyDelivery's value (e.g. "worker-src-self").
+    '''
+
+    # script-src
+    # Test-related scripts like testharness.js and inline scripts containing
+    # test bodies.
+    # 'unsafe-inline' is added as a workaround here. This is probably not so
+    # bad, as it shouldn't intefere non-inline-script requests that we want to
+    # test.
+    if value == 'script-src-wildcard':
+        return "script-src * 'unsafe-inline'"
+    if value == 'script-src-self':
+        return "script-src 'self' 'unsafe-inline'"
+    # Workaround for "script-src 'none'" would be more complicated, because
+    # - "script-src 'none' 'unsafe-inline'" is handled somehow differently from
+    #   "script-src 'none'", i.e.
+    #   https://w3c.github.io/webappsec-csp/#match-url-to-source-list Step 3
+    #   handles the latter but not the former.
+    # - We need nonce- or path-based additional values to allow same-origin
+    #   test scripts like testharness.js.
+    # Therefore, we disable 'script-src-none' tests for now in
+    # `/content-security-policy/spec.src.json`.
+    if value == 'script-src-none':
+        return "script-src 'none'"
+
+    # worker-src
+    if value == 'worker-src-wildcard':
+        return 'worker-src *'
+    if value == 'worker-src-self':
+        return "worker-src 'self'"
+    if value == 'worker-src-none':
+        return "worker-src 'none'"
+    raise Exception('Invalid delivery_value: %s' % value)
+
 def generate_payload(request):
     import_url = unquote(isomorphic_decode(request.GET[b'import_url']))
     return subresource.get_template(u"static-import.js.template") % {
@@ -12,8 +49,13 @@ def generate_payload(request):
     }
 
 def main(request, response):
-    payload_generator = lambda _: generate_payload(request)
+    def payload_generator(_): return generate_payload(request)
+    maybe_additional_headers = {}
+    if b'contentSecurityPolicy' in request.GET:
+        csp = unquote(isomorphic_decode(request.GET[b'contentSecurityPolicy']))
+        maybe_additional_headers[b'Content-Security-Policy'] = get_csp_value(csp)
     subresource.respond(request,
                         response,
                         payload_generator = payload_generator,
-                        content_type = b"application/javascript")
+                        content_type = b"application/javascript",
+                        maybe_additional_headers = maybe_additional_headers)
diff --git a/tests/wpt/web-platform-tests/content-security-policy/generic/test-case.sub.js b/tests/wpt/web-platform-tests/content-security-policy/generic/test-case.sub.js
index 81d9e1c8e3ec8..d9a6494dd36af 100644
--- a/tests/wpt/web-platform-tests/content-security-policy/generic/test-case.sub.js
+++ b/tests/wpt/web-platform-tests/content-security-policy/generic/test-case.sub.js
@@ -51,7 +51,14 @@ function TestCase(scenarios, sanityChecker) {
         // securitypolicyviolation events are fired in a queued task in
         // https://w3c.github.io/webappsec-csp/#report-violation
         // so wait for queued tasks to run using setTimeout().
-        await new Promise(resolve => setTimeout(resolve, 0));
+        let timeout = 0;
+        if (scenario.subresource.startsWith('worklet-') &&
+            navigator.userAgent.includes("Firefox/")) {
+          // https://bugzilla.mozilla.org/show_bug.cgi?id=1808911
+          // In Firefox sometimes violations from Worklets are delayed.
+          timeout = 10;
+        }
+        await new Promise(resolve => setTimeout(resolve, timeout));
 
         // Pass violation events to `violationEventPromise` (which will be tested
         // in the subsequent promise_test()) and clean up the listener.
diff --git a/tests/wpt/web-platform-tests/cookies/resources/set-cookie.py b/tests/wpt/web-platform-tests/cookies/resources/set-cookie.py
index 839f350c449fb..b18408767c1cf 100644
--- a/tests/wpt/web-platform-tests/cookies/resources/set-cookie.py
+++ b/tests/wpt/web-platform-tests/cookies/resources/set-cookie.py
@@ -21,8 +21,14 @@ def main(request, response):
 
     name = request.GET[b'name']
     path = request.GET[b'path']
+    samesite = request.GET.get(b'samesite')
+    secure = b'secure' in request.GET
     expiry_year = date.today().year + 1
     cookie = b"%s=1; Path=%s; Expires=09 Jun %d 10:18:14 GMT" % (name, path, expiry_year)
+    if samesite:
+        cookie += b";SameSite=%s" % samesite
+    if secure:
+        cookie += b";Secure"
 
     headers = [
         (b"Content-Type", b"application/json"),
diff --git a/tests/wpt/web-platform-tests/css/css-animations/sample-on-last-keyframe.html b/tests/wpt/web-platform-tests/css/css-animations/sample-on-last-keyframe.html
new file mode 100644
index 0000000000000..d9dde2e87b997
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-animations/sample-on-last-keyframe.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Sample on last keyframe</title>
+  <link rel="help" href="https://www.w3.org/TR/css-animations-1/#animation-direction">
+  <style type="text/css" media="screen">
+    #test {
+      animation:  test 1s reverse paused;
+    }
+    @keyframes test {
+      from { opacity: 0; }
+      to { opacity: 0.5; }
+    }
+  </style>
+</head>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+<body>
+<div id="log"></div>
+<script>
+'use strict';
+
+promise_test(async t => {
+  const div = createDiv(t);
+  div.id = 'test';
+  const anim = div.getAnimations()[0];
+  await anim.ready;
+  const opacity = parseFloat(getComputedStyle(div).opacity);
+  assert_equals(opacity, 0.5);
+}, 'Opacity at start of reverse running animation');
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/support/testcommon.js b/tests/wpt/web-platform-tests/css/css-animations/support/testcommon.js
index 654aaa51c55c0..49c9863147ee3 100644
--- a/tests/wpt/web-platform-tests/css/css-animations/support/testcommon.js
+++ b/tests/wpt/web-platform-tests/css/css-animations/support/testcommon.js
@@ -247,15 +247,3 @@ function flushComputedStyle(elem) {
   var cs = getComputedStyle(elem);
   cs.marginLeft;
 }
-// Waits for a given animation being ready to restyle.
-async function waitForAnimationReadyToRestyle(aAnimation) {
-  await aAnimation.ready;
-  // If |aAnimation| begins at the current timeline time, we will not process
-  // restyling in the initial frame because of aligning with the refresh driver,
-  // the animation frame in which the ready promise is resolved happens to
-  // coincide perfectly with the start time of the animation.  In this case no
-  // restyling is needed in the frame so we have to wait one more frame.
-  if (animationStartsRightNow(aAnimation)) {
-    await waitForNextFrame();
-  }
-}
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-gradient-subpixel-fills-area.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-gradient-subpixel-fills-area.html
index f723350de6853..2a305068fe4ce 100644
--- a/tests/wpt/web-platform-tests/css/css-backgrounds/background-gradient-subpixel-fills-area.html
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-gradient-subpixel-fills-area.html
@@ -5,6 +5,7 @@
   <link rel="author" title="schenney" href="mailto:schenney@chromium.org">
   <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#the-background-origin">
   <link rel="match" href="reference/background-gradient-subpixel-fills-area-ref.html">
+  <meta name="fuzzy" content="maxDifference=0-1;totalPixels=6800">
   <style>
     ul {
       width: 396.875px;
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size-cover-003.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size-cover-003.html
index 4d2b6b125eac0..83287ee2cf43d 100644
--- a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size-cover-003.html
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size-cover-003.html
@@ -6,6 +6,7 @@
 <link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
 <link rel="author" href="https://mozilla.org" title="Mozilla">
 <link rel="match" href="background-size-cover-003-ref.html">
+<meta name="fuzzy" content="maxDifference=0-255;totalPixels=0-1">
 <style>
 body { margin: 0 }
 div {
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-cover-svg.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-cover-svg.html
index 01cbc17e5c653..091600a185fcd 100644
--- a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-cover-svg.html
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-cover-svg.html
@@ -5,6 +5,7 @@
   <link rel="author" title="schenney" href="mailto:schenney@chromium.org">
   <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#the-background-size">
   <link rel="match" href="reference/background-size-cover-svg-ref.html">
+  <meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-1200">
   <style>
     div {
       height: 400px;
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/hidpi/simple-bg-color-ref.html b/tests/wpt/web-platform-tests/css/css-backgrounds/hidpi/simple-bg-color-ref.html
index d768c02b25a82..1030d005d93f9 100644
--- a/tests/wpt/web-platform-tests/css/css-backgrounds/hidpi/simple-bg-color-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/hidpi/simple-bg-color-ref.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <body>
-  <canvas id="canvas" width="400" height="800"></canvas>
+  <canvas id="canvas" width="400" height="800" style="image-rendering: crisp-edges"></canvas>
 </body>
 <script>
   var canvas = document.getElementById('canvas');
diff --git a/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001-ref.html b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001-ref.html
new file mode 100644
index 0000000000000..f4caedc110f43
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001-ref.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
+  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1811548">
+
+  <style>
+  div {
+    box-sizing: border-box;
+  }
+  .multicol {
+    column-count: 2;
+    column-gap: 0;
+    column-fill: auto;
+    inline-size: 300px;
+    block-size: 100px;
+    border: 10px solid purple;
+  }
+  .flexbox {
+    display: block;
+    inline-size: 130px;
+    block-size: 70px;
+    border: 10px solid black;
+  }
+  .item {
+    block-size: 50px;
+    border: 10px solid teal;
+  }
+  .grandchild {
+    border: 10px solid orange;
+    block-size: 140px;
+  }
+  </style>
+
+  <div class="multicol">
+    <div class="flexbox">
+      <div class="item">
+        <div class="grandchild"></div>
+      </div>
+    </div>
+  </div>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001a.html b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001a.html
new file mode 100644
index 0000000000000..0b8074e03b995
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001a.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>Tests that a flex item's overflow content in the second column has the same inline-size as its previous fragment in the first column.</title>
+  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
+  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1811548">
+  <link rel="match" href="flex-item-content-overflow-001-ref.html">
+
+  <style>
+  div {
+    box-sizing: border-box;
+  }
+  .multicol {
+    column-count: 2;
+    column-gap: 0;
+    column-fill: auto;
+    inline-size: 300px;
+    block-size: 100px;
+    border: 10px solid purple;
+  }
+  .flexbox {
+    display: flex;
+    inline-size: 130px;
+    block-size: 70px;
+    border: 10px solid black;
+  }
+  .item {
+    flex: 1;
+    border: 10px solid teal;
+  }
+  .grandchild {
+    border: 10px solid orange;
+    block-size: 140px;
+  }
+  </style>
+
+  <div class="multicol">
+    <div class="flexbox">
+      <div class="item">
+        <div class="grandchild"></div>
+      </div>
+    </div>
+  </div>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001b.html b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001b.html
new file mode 100644
index 0000000000000..50f958614ce84
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-001b.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>Tests that a flex item's overflow content in the second column has the same inline-size as its previous fragment in the first column.</title>
+  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
+  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1811548">
+  <link rel="match" href="flex-item-content-overflow-001-ref.html">
+
+  <style>
+  .multicol {
+    column-count: 2;
+    column-gap: 0;
+    column-fill: auto;
+    inline-size: 280px;
+    block-size: 80px;
+    border: 10px solid purple;
+  }
+  .flexbox {
+    display: flex;
+    inline-size: 110px;
+    block-size: 50px;
+    border: 10px solid black;
+  }
+  .item {
+    flex: 1;
+    border: 10px solid teal;
+  }
+  .grandchild {
+    border: 10px solid orange;
+    block-size: 120px;
+  }
+  </style>
+
+  <div class="multicol">
+    <div class="flexbox">
+      <div class="item">
+        <div class="grandchild"></div>
+      </div>
+    </div>
+  </div>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002a.html b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002a.html
new file mode 100644
index 0000000000000..18e659dd3e292
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002a.html
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>Tests that a flex item's overflow content in the second column has the same inline-size as its previous fragment in the first column.</title>
+  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
+  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1811548">
+  <link rel="match" href="flex-item-content-overflow-001-ref.html">
+
+  <style>
+  div {
+    box-sizing: border-box;
+  }
+  .multicol {
+    column-count: 2;
+    column-gap: 0;
+    column-fill: auto;
+    inline-size: 300px;
+    block-size: 100px;
+    border: 10px solid purple;
+  }
+  .flexbox {
+    display: flex;
+    flex-direction: column;
+    inline-size: 130px;
+    block-size: 70px;
+    border: 10px solid black;
+  }
+  .item {
+    flex: 1;
+    min-height: 0;
+    border: 10px solid teal;
+  }
+  .grandchild {
+    border: 10px solid orange;
+    block-size: 140px;
+  }
+  </style>
+
+  <div class="multicol">
+    <div class="flexbox">
+      <div class="item">
+        <div class="grandchild"></div>
+      </div>
+    </div>
+  </div>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002b.html b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002b.html
new file mode 100644
index 0000000000000..af985b2aa2ea1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/flexbox/flex-item-content-overflow-002b.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>Tests that a flex item's overflow content in the second column has the same inline-size as its previous fragment in the first column.</title>
+  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
+  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1811548">
+  <link rel="match" href="flex-item-content-overflow-001-ref.html">
+
+  <style>
+  .multicol {
+    column-count: 2;
+    column-gap: 0;
+    column-fill: auto;
+    inline-size: 280px;
+    block-size: 80px;
+    border: 10px solid purple;
+  }
+  .flexbox {
+    display: flex;
+    flex-direction: column;
+    inline-size: 110px;
+    block-size: 50px;
+    border: 10px solid black;
+  }
+  .item {
+    flex: 1;
+    min-height: 0;
+    border: 10px solid teal;
+  }
+  .grandchild {
+    border: 10px solid orange;
+    block-size: 120px;
+  }
+  </style>
+
+  <div class="multicol">
+    <div class="flexbox">
+      <div class="item">
+        <div class="grandchild"></div>
+      </div>
+    </div>
+  </div>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/at-scope-parsing.html b/tests/wpt/web-platform-tests/css/css-cascade/at-scope-parsing.html
index 13fe94fe8970e..6fc6ac8528953 100644
--- a/tests/wpt/web-platform-tests/css/css-cascade/at-scope-parsing.html
+++ b/tests/wpt/web-platform-tests/css/css-cascade/at-scope-parsing.html
@@ -38,6 +38,7 @@
   test_valid('@scope (.a) to (.b)');
   test_valid('@scope (.a)to (.b)', '@scope (.a) to (.b)');
   test_valid('@scope (.a) to (.b:hover, #c, div)');
+  test_valid('@scope');
 
   // Forgiving behavior:
   test_valid('@scope (.c <> .d)', '@scope ()');
@@ -46,7 +47,7 @@
   test_valid('@scope (div::before)', '@scope ()');
   test_valid('@scope (div::after)', '@scope ()');
   test_valid('@scope (slotted(div))', '@scope ()');
-  test_valid('@scope (.a) to (div::before)', '@scope (.a) to ()');
+  test_valid('@scope (.a) to (div::before)', '@scope (.a)');
 
   test_invalid('@scope (.a) unknown (.c)');
   test_invalid('@scope (.a) to unknown (.c)');
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/scope-evaluation.html b/tests/wpt/web-platform-tests/css/css-cascade/scope-evaluation.html
index bd20712c7f26c..48139d048a05e 100644
--- a/tests/wpt/web-platform-tests/css/css-cascade/scope-evaluation.html
+++ b/tests/wpt/web-platform-tests/css/css-cascade/scope-evaluation.html
@@ -356,11 +356,68 @@
   assert_not_green('#adjacent');
   assert_green('.a');
   assert_green('.a > div');
-  assert_green('.b');
+  assert_not_green('.b');
   assert_not_green('#below');
-}, 'The scoping limit is in scope');
+}, 'The scoping limit is not in scope');
 </script>
 
+<template>
+  <style>
+    @scope (.a) to (.b > *) {
+      * { background-color: green; }
+    }
+  </style>
+  <div id=above>
+    <div class=a>
+      <div>
+        <div class=b>
+          <div id=limit></div>
+        </div>
+      </div>
+    </div>
+    <div id=adjacent></div>
+  </div>
+</template>
+<script>
+test_scope(document.currentScript, () => {
+  assert_not_green('#above');
+  assert_not_green('#adjacent');
+  assert_green('.a');
+  assert_green('.a > div');
+  assert_green('.b');
+  assert_not_green('#limit');
+}, 'Simulated inclusive scoping limit');
+</script>
+
+<template>
+  <style>
+    @scope (.a) to (.a) {
+      * { background-color: green; }
+    }
+  </style>
+  <div id=above>
+    <div class=a>
+      <div>
+        <div class=b>
+          <div id=inner></div>
+        </div>
+      </div>
+    </div>
+    <div id=adjacent></div>
+  </div>
+</template>
+<script>
+test_scope(document.currentScript, () => {
+  assert_not_green('#above');
+  assert_not_green('#adjacent');
+  assert_not_green('.a');
+  assert_not_green('.a > div');
+  assert_not_green('.b');
+  assert_not_green('#inner');
+}, 'Scope with no elements');
+</script>
+
+
 <template>
   <style>
     @scope (.a) {
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/scope-shadow.html b/tests/wpt/web-platform-tests/css/css-cascade/scope-shadow.html
new file mode 100644
index 0000000000000..6083e08b4ccaa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-cascade/scope-shadow.html
@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<title>@scope - ShadowDOM</title>
+<link rel="help" href="https://drafts.csswg.org/css-cascade-6/#scope-atrule">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/declarative-shadow-dom-polyfill.js"></script>
+
+<div id=host_plain>
+  <template shadowroot=open>
+    <style>
+      @scope (:host) {
+        .a {
+          z-index: 1;
+        }
+      }
+    </style>
+    <div class=a>
+    </div>
+  </template>
+</div>
+<script>
+  setup(() => {
+    polyfill_declarative_shadow_dom(document);
+  });
+
+  test(() => {
+    let a = host_plain.shadowRoot.querySelector('.a');
+    assert_equals(getComputedStyle(a).zIndex, '1');
+  }, '@scope can match :host');
+</script>
+
+<div id=host_functional>
+  <template shadowroot=open>
+    <style>
+      @scope (:host(div)) {
+        .a {
+          z-index: 1;
+        }
+      }
+      /* Should not match: */
+      @scope (:host(span)) {
+        .a {
+          z-index: 42;
+        }
+      }
+    </style>
+    <div class=a>
+    </div>
+  </template>
+</div>
+<script>
+  setup(() => {
+    polyfill_declarative_shadow_dom(document);
+  });
+
+  test(() => {
+    let a = host_functional.shadowRoot.querySelector('.a');
+    assert_equals(getComputedStyle(a).zIndex, '1');
+  }, '@scope can match :host(...)');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/content-visibility/content-visibility-auto-applied-to-th-crash.html b/tests/wpt/web-platform-tests/css/css-contain/content-visibility/content-visibility-auto-applied-to-th-crash.html
new file mode 100644
index 0000000000000..cde696e2f65d2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/content-visibility/content-visibility-auto-applied-to-th-crash.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
+    <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
+    <meta name="assert" content="content-visiblity: auto on a <th> element should not cause a crash.">
+    <style>
+        TR {
+          content-visibility: auto;
+        }
+        * {
+            inset-block-end: 21%;
+        }
+    </style>
+</head>
+<body>
+    <table>
+    <th>
+    <sub>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-parsing.html b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-parsing.html
index 52f99ecf0a5b6..477a3f81215c6 100644
--- a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-parsing.html
+++ b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-parsing.html
@@ -73,71 +73,174 @@
     'background-image',
     'image-set(url("example.png") 1x)'
   );
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(2x * 3))',
+    'image-set(url("example.png") calc(6x))'
+  );
   test_valid_value_variants(
     'background-image',
     'image-set(url("example.png") 1dppx)'
   );
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(1dppx * 1))',
+    'image-set(url("example.png") calc(1dppx))'
+  );
   test_valid_value_variants(
     'background-image',
     'image-set(url("example.png") 1dpi)'
   );
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(96dpi * 2))',
+    'image-set(url("example.png") calc(2dppx))'
+  );
   test_valid_value_variants(
     'background-image',
     'image-set(url("example.png") 1dpcm)'
   );
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(1dpcm * 96/2.54))',
+    'image-set(url("example.png") calc(1dppx))'
+  );
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") 1x, url("example.png") 2dppx, "example.png" 250dpi, "example.png" 1dpcm)',
+    'image-set(url("example.png") 1x, url("example.png") 2dppx, url("example.png") 250dpi, url("example.png") 1dpcm)'
+  );
   test_valid_value_variants(
     'content',
     'image-set(url("example.png") 1dpi)'
   );
+  test_valid_value_variants(
+    'content',
+    'image-set(url("example.png") calc(1 * 96dpi))',
+    'image-set(url("example.png") calc(1dppx))'
+  );
 
   test_invalid_value_variants(
     'background-image',
     'image-set(url("example.png") 1invalidResUnit)'
   );
+  test_invalid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(3 * 4))'
+  );
+  test_invalid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(2 - 1))'
+  );
+  test_invalid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(2x - 1))'
+  );
+  test_invalid_value_variants(
+    'background-image',
+    'image-set(url("example.png") calc(1 + 4dpi))'
+  );
 }
 
 function test_gradient_images_parsing() {
   test_valid_value_variants(
     'background-image',
     "image-set(linear-gradient(black, white) 1x)"
-    );
+  );
   test_valid_value_variants(
     'background-image',
     "image-set(repeating-linear-gradient(red, blue 25%) 1x)"
-    );
+  );
   test_valid_value_variants(
     'background-image',
     "image-set(radial-gradient(black, white) 1x)"
-    );
+  );
   test_valid_value_variants(
     'background-image',
     "image-set(repeating-radial-gradient(red, blue 25%) 1x)"
-    );
+  );
   test_valid_value_variants(
     'background-image',
     "image-set(conic-gradient(black, white) 1x)"
-    );
+  );
   test_valid_value_variants(
     'background-image',
     "image-set(repeating-conic-gradient(red, blue 25%) 1x)"
-    );
+  );
   test_valid_value_variants(
     'content',
     'image-set(linear-gradient(black, white) 1x, url("example.png") 4x)'
-    );
+  );
   test_valid_value_variants(
     'content',
     'image-set(url("example.png") 192dpi, linear-gradient(black, white) 1x)'
-    );
+  );
 
   test_invalid_value_variants(
     'cursor',
     "image-set(linear-gradient(black, white) 1x)"
-    );
+  );
   test_invalid_value_variants(
     'background-image',
     "image-set(linear-gradient(red) 1x)"
-    );
+  );
+}
+
+function test_image_type_parsing() {
+  test_valid_value_variants(
+    'background-image',
+    'image-set(url("example.png") 1x type("image/png"))'
+  );
+  test_valid_value_variants(
+    'background-image',
+    "image-set(url(example.png) type('image/png'))",
+    'image-set(url("example.png") 1x type("image/png"))'
+  );
+  test_valid_value_variants(
+    'background-image',
+    "image-set(url(example.png) type('image/png') 1x)",
+    'image-set(url("example.png") 1x type("image/png"))'
+  );
+  test_valid_value_variants(
+    'background-image',
+    "image-set(url(example.png) 1x type('image/jpeg'))",
+    'image-set(url("example.png") 1x type("image/jpeg"))'
+  );
+
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(url(example.png) type(image/png))"
+  );
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(url(example.png) type('image/png') type('image/png'))"
+  );
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(url(example.png) 1xtype('image/png'))"
+  );
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(type('image/png') url(example.png) 1x)"
+  );
+}
+
+function test_no_images_set_nesting() {
+  // Spec definition:
+  // "The image-set() function can not be nested inside of itself,
+  // either directly or indirectly (as an argument to another <image> type)."
+
+  // Direct nesting
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(image-set(url(example.png)) 2x)"
+  );
+
+  // Indirect nesting
+  test_invalid_value_variants(
+    'background-image',
+    "image-set(image(image-set(url(example.png)) 2x) 2x)"
+  );
 }
 
 function test_image_set_parsing() {
@@ -146,26 +249,25 @@
   test_valid_value_variants('background-image', "image-set(url(example.png) 1x, 'example.png' 2x)", 'image-set(url("example.png") 1x, url("example.png") 2x)');
   test_valid_value_variants('background-image', "image-set(url(example.png) 1dpcm, 'example.png' 2x)", 'image-set(url("example.png") 1dpcm, url("example.png") 2x)');
   test_valid_value_variants('background-image', "image-set('example.jpeg' 222dpi, url(example.png) 3.5x)", 'image-set(url("example.jpeg") 222dpi, url("example.png") 3.5x)');
-  test_valid_value_variants('background-image', 'image-set(url("example.png") 1x type("image/png"))');
-  test_valid_value_variants('background-image', "image-set(url(example.png) type('image/png'))", 'image-set(url("example.png") 1x type("image/png"))');
-  test_valid_value_variants('background-image', "image-set(url(example.png) type('image/png') 1x)", 'image-set(url("example.png") 1x type("image/png"))');
+
+  test_valid_value_variants('content', 'image-set(url("example.png") 1x)', 'image-set(url("example.png") 1x)');
+  test_valid_value_variants('content', 'image-set(url("example.png") 1x, "example.png" 3x)', 'image-set(url("example.png") 1x, url("example.png") 3x)');
+  test_valid_value_variants('border-image-source', 'image-set(url("example.png") 1x)', 'image-set(url("example.png") 1x)');
+  test_valid_value_variants('border-image-source', 'image-set(url("example.png") 1x, "example.png" 3x)', 'image-set(url("example.png") 1x, url("example.png") 3x)');
 
   test_invalid_value_variants('background-image', "image-set(none, url(example.png) 1x)");
   test_invalid_value_variants('background-image', "image-set()");
   test_invalid_value_variants('background-image', "image-set(url(example.png) 0x)");
   test_invalid_value_variants('background-image', "image-set(url(example.png) -20x)");
   test_invalid_value_variants('background-image', "image-set('example.jpeg' 92pid url(example.png) 1x)");
-  test_invalid_value_variants('background-image', "image-set(url(example.png) type(image/png))");
-  test_invalid_value_variants('background-image', "image-set(url(example.png) type('image/png') type('image/png'))");
-  test_invalid_value_variants('background-image', "image-set(url(example.png) 1xtype('image/png'))");
-  test_invalid_value_variants('background-image', "image-set(type('image/png') url(example.png) 1x)");
   test_invalid_value_variants('background-image', "image-set(url(example.png) 1x url(example.jpeg))");
   test_invalid_value_variants('background-image', "image-set(url(example.png) 1x 2x)");
-  test_invalid_value_variants('background-image', "image-set(image-set(url(example.png)) 2x)");
 
   test_default_resolution_parsing();
   test_resolution_units_parsing();
   test_gradient_images_parsing();
+  test_image_type_parsing();
+  test_no_images_set_nesting();
 }
 
 test_image_set_parsing();
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering-2.html b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering-2.html
index ea2dd6f9795da..bebc32d87d389 100644
--- a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering-2.html
+++ b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering-2.html
@@ -3,7 +3,7 @@
 <link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org">
 <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
 <link rel="help" href="https://drafts.csswg.org/css-images-4/#image-set-notation">
-<link rel="match" href="reference/image-set-rendering-ref.html">
+<link rel="match" href="/css/reference/blank.html">
 <meta name="assert" content="image-set rendering with all unsupported types">
 <!--
 Spec definition:
@@ -16,9 +16,6 @@
 the set should be empty.
 
 "This has no effect on the validity of the image-set() function"
-
-https://github.com/w3c/csswg-drafts/issues/8266 to define what the result
-should be here, maybe an alternative would be to not render an image at all.
 -->
 <style>
   #test {
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering.html b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering.html
index ef7c4a20efba6..486fcb3a8e04e 100644
--- a/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering.html
+++ b/tests/wpt/web-platform-tests/css/css-images/image-set/image-set-type-unsupported-rendering.html
@@ -3,7 +3,7 @@
 <link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org">
 <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">
 <link rel="help" href="https://drafts.csswg.org/css-images-4/#image-set-notation">
-<link rel="match" href="reference/image-set-rendering-ref.html">
+<link rel="match" href="/css/reference/blank.html">
 <meta name="assert" content="image-set rendering with unsupported type">
 <!--
 Spec definition:
@@ -12,10 +12,10 @@
   First, remove any <image-set-option>s from the list that specify
   an unknown or unsupported MIME type in their type() value."
 
-"This has no effect on the validity of the image-set() function"
+If all the values in the image set are of an unsupported type,
+the set should be empty.
 
-https://github.com/w3c/csswg-drafts/issues/8266 to define what the result
-should be here, maybe an alternative would be to not render an image at all.
+"This has no effect on the validity of the image-set() function"
 -->
 <style>
   #test {
diff --git a/tests/wpt/web-platform-tests/css/css-masking/animations/mask-image-interpolation.html b/tests/wpt/web-platform-tests/css/css-masking/animations/mask-image-interpolation.html
index beb9c9eaab034..ac6b266992d5e 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/animations/mask-image-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/animations/mask-image-interpolation.html
@@ -28,102 +28,53 @@
 <body>
 <script>
 // neutral
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: neutralKeyframe,
   to: 'url(../resources/green-20.png)',
-}, [
-  {at: -0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.6, expect: 'url(../resources/green-20.png)'},
-  {at: 1, expect: 'url(../resources/green-20.png)'},
-  {at: 1.5, expect: 'url(../resources/green-20.png)'},
-]);
+});
 
 // initial
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'initial',
   to: 'url(../resources/green-20.png)',
-}, [
-  {at: -0.3, expect: 'none'},
-  {at: 0, expect: 'none'},
-  {at: 0.3, expect: 'none'},
-  {at: 0.6, expect: 'url(../resources/green-20.png)'},
-  {at: 1, expect: 'url(../resources/green-20.png)'},
-  {at: 1.5, expect: 'url(../resources/green-20.png)'},
-]);
+});
 
 // inherit
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'inherit',
   to: 'url(../resources/green-20.png)',
-}, [
-  {at: -0.3, expect: 'url(../resources/blue-20.png)'},
-  {at: 0, expect: 'url(../resources/blue-20.png)'},
-  {at: 0.3, expect: 'url(../resources/blue-20.png)'},
-  {at: 0.6, expect: 'url(../resources/green-20.png)'},
-  {at: 1, expect: 'url(../resources/green-20.png)'},
-  {at: 1.5, expect: 'url(../resources/green-20.png)'},
-]);
+});
 
 // unset
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'unset',
   to: 'url(../resources/stripes-20.png)',
-}, [
-  {at: -0.3, expect: 'none'},
-  {at: 0, expect: 'none'},
-  {at: 0.3, expect: 'none'},
-  {at: 0.6, expect: 'url(../resources/stripes-20.png)'},
-  {at: 1, expect: 'url(../resources/stripes-20.png)'},
-  {at: 1.5, expect: 'url(../resources/stripes-20.png)'},
-]);
+});
 
 // Image to image
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'url(../resources/stripes-20.png)',
   to: 'url(../resources/blue-20.png)',
-}, [
-  {at: -0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.6, expect: 'url(../resources/blue-20.png)'},
-  {at: 1, expect: 'url(../resources/blue-20.png)'},
-  {at: 1.5, expect: 'url(../resources/blue-20.png)'},
-]);
+});
 
 //Image to gradient
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'url(../resources/stripes-20.png)',
   to: 'linear-gradient(45deg, blue, transparent)'
-}, [
-  {at: -0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.3, expect: 'url(../resources/stripes-20.png)'},
-  {at: 0.6, expect: 'linear-gradient(45deg, blue, transparent)'},
-  {at: 1, expect: 'linear-gradient(45deg, blue, transparent)'},
-  {at: 1.5, expect: 'linear-gradient(45deg, blue, transparent)'},
-]);
+});
 
 // Keyword to image
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'none',
   to: 'url(../resources/green-20.png)',
-}, [
-  {at: -0.3, expect: 'none'},
-  {at: 0, expect: 'none'},
-  {at: 0.3, expect: 'none'},
-  {at: 0.6, expect: 'url(../resources/green-20.png)'},
-  {at: 1, expect: 'url(../resources/green-20.png)'},
-  {at: 1.5, expect: 'url(../resources/green-20.png)'},
-]);
+});
 
 // Multiple to multiple
 var fromA = 'url(../resources/stripes-20.png)';
@@ -132,49 +83,28 @@
 var toB = 'url(../resources/stripes-20.png)';
 var from = fromA + ', ' + fromB;
 var to = toA + ', ' + toB;
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: from,
   to: to,
-}, [
-  {at: -0.3, expect: from},
-  {at: 0, expect: from},
-  {at: 0.3, expect: from},
-  {at: 0.6, expect: to},
-  {at: 1, expect: to},
-  {at: 1.5, expect: to},
-]);
+});
 
 // Single to multiple
 from = 'url(../resources/blue-20.png)';
 toA = 'url(../resources/stripes-20.png)';
 toB = 'url(../resources/blue-20.png)';
 to = toA + ', ' + toB;
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: from,
   to: to,
-}, [
-  {at: -0.3, expect: from},
-  {at: 0, expect: from},
-  {at: 0.3, expect: from},
-  {at: 0.6, expect: to},
-  {at: 1, expect: to},
-  {at: 1.5, expect: to},
-]);
+});
 
 // Multiple mismatched types
-test_interpolation({
+test_no_interpolation({
   property: 'mask-image',
   from: 'url(../resources/blue-20.png), none',
   to: 'url(../resources/stripes-20.png), url(../resources/blue-20.png)',
-}, [
-  {at: -0.3, expect: from},
-  {at: 0, expect: from},
-  {at: 0.3, expect: from},
-  {at: 0.6, expect: to},
-  {at: 1, expect: to},
-  {at: 1.5, expect: to},
-]);
+});
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip-transform.svg b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip-transform.svg
index fc1f768878e19..e3ca1fbdba7da 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip-transform.svg
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip-transform.svg
@@ -7,6 +7,7 @@
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#svg-masks"/>
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#MaskElement"/>
 	<html:link rel="match" href="reference/mask-content-clip-002-ref.svg" />
+	<html:meta name="fuzzy" content="0-38; 0-200"/>
 	<metadata class="flags">svg</metadata>
 	<desc class="assert">The mask element with
 	maskContentUnits="objectBoundingBox" gets clipped. The clipping path has a
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip.svg b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip.svg
index a8d8a12dc0e02..47cf9006974d7 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip.svg
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-objectboundingbox-content-clip.svg
@@ -7,6 +7,7 @@
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#svg-masks"/>
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#MaskElement"/>
 	<html:link rel="match" href="reference/mask-content-clip-001-ref.svg" />
+	<html:meta name="fuzzy" content="0-38; 0-200"/>
 	<metadata class="flags">svg</metadata>
 	<desc class="assert">The mask element with
 	maskContentUnits="objectBoundingBox" gets clipped. The clipping path has a
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip-transform.svg b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip-transform.svg
index b979ff312a0fa..03310225e209d 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip-transform.svg
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip-transform.svg
@@ -7,6 +7,7 @@
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#svg-masks"/>
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#MaskElement"/>
 	<html:link rel="match" href="reference/mask-content-clip-002-ref.svg" />
+	<html:meta name="fuzzy" content="0-38; 0-200"/>
 	<metadata class="flags">svg</metadata>
 	<desc class="assert">The mask element with
 	maskContentUnits="userSpaceOnUse" gets clipped. The clipping path has a
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip.svg b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip.svg
index c9f3cf8f69f4c..09eb2dfcd01be 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip.svg
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path-svg-content/mask-userspaceonuse-content-clip.svg
@@ -7,6 +7,7 @@
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#svg-masks"/>
 	<html:link rel="help" href="http://www.w3.org/TR/css-masking-1/#MaskElement"/>
 	<html:link rel="match" href="reference/mask-content-clip-001-ref.svg" />
+	<html:meta name="fuzzy" content="0-38; 0-200"/>
 	<metadata class="flags">svg</metadata>
 	<desc class="assert">The mask element with
 	maskContentUnits="userSpaceOnUse" gets clipped. The clipping path has a
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-001.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-001.html
index d38b909a4d43c..e40cdb103a97e 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-001.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-001.html
@@ -8,6 +8,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. Test absolute values for arguments. On pass you
     should see a green circle and no red.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-002.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-002.html
index ab672aaa2af24..deb199a5b66fc 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-002.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-002.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. Test percentage values for arguments. If no
     reference box was specified, percentage is relative to border-box. On pass
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-003.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-003.html
index 6c6eadb8e9860..24b3f31f61b59 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-003.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-003.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. Test percentage value as argument for radius and no
     position arguments. The circle should be in the center of the element. On
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-004.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-004.html
index 6244d38ee5b8f..ddbccf0336d79 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-004.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-004.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. Test percentage value as argument for position and
     no radius argument. The circle must behave like it has a radius of
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-005.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-005.html
index bcabc72dc0b32..3a25ce5fff79c 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-005.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-005.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. The circle has a radius of 'closest-side'. This test
     has a squred div-box. Therefore, 'closest-side', 50% and 'farthest-side'
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-006.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-006.html
index 9de416a2068e9..8434edd216055 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-006.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-006.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. The circle has a radius of 'farthest-side'. This
     test has a squred div-box. Therefore, 'closest-side', 50% and
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-007.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-007.html
index 7ff3fdd00096f..60c5cd52e327b 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-007.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-007.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-2-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. The clipped div box is twice as wide as it is
     height. With 'closest-side', there should be a full green circle.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-008.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-008.html
index 31ae8ee5823b6..a931d3e319ea5 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-008.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-circle-008.html
@@ -6,6 +6,7 @@
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
     <link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-clip-path">
     <link rel="match" href="reference/clip-path-circle-3-ref.html">
+    <meta name="fuzzy" content="0-38; 0-800">
     <meta name="assert" content="The clip-path property takes the basic shape
     'circle' for clipping. The clipped div box is twice as high as it is
     wide. With 'closest-side', there should be a full green circle.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-001.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-001.html
index 197f422ce4b57..f48b197137cec 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-001.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-001.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test absolute values for radii and position
 	arguments. On pass you should see a green ellipse.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-002.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-002.html
index 36f63fc5e9c69..ecc5ca090f7df 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-002.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-002.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test percentage values for radii and position
 	arguments. Percentage values are relative to a reference box. If no
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-003.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-003.html
index 81ded182923f4..eff287614b12a 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-003.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-003.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-circle-ref.html">
+	<meta name="fuzzy" content="0-38; 0-800">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test percentage values for radii and position
 	arguments. Percentage values are relative to a reference box. If no
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-004.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-004.html
index f62f958fb6304..3988840943c85 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-004.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-004.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test absolute values for arguments. On pass you
 	should see a green ellipse.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-005.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-005.html
index 2e819e79b0044..c7107d26171d8 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-005.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-005.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test percentage values for radii and position
 	arguments. Percentage values are relative to a reference box. If no
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-006.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-006.html
index fb20f0243bdc8..d0b4efafebf46 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-006.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-006.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test absolute values for radii and position
 	arguments. On pass you should see a green circle.">
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-007.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-007.html
index 42d8b451ff0de..2105b36df370e 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-007.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-007.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. If no further arguments were specified, the radii
 	are 'closest-side' each. The position is initialised to the center of the
diff --git a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-008.html b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-008.html
index 12df558fd2c2f..4e4ac51842995 100644
--- a/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-008.html
+++ b/tests/wpt/web-platform-tests/css/css-masking/clip-path/clip-path-ellipse-008.html
@@ -6,6 +6,7 @@
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#clipping-paths">
 	<link rel="help" href="http://www.w3.org/TR/css-masking-1/#propdef-clip-path">
 	<link rel="match" href="reference/clip-path-ellipse-ref.html">
+	<meta name="fuzzy" content="0-38; 0-400">
 	<meta name="assert" content="The clip-path property takes the basic shape
 	'ellipse' for clipping. Test percentage values for radii and position
 	arguments. Percentage values are relative to a reference box. If no
diff --git a/tests/wpt/web-platform-tests/css/css-properties-values-api/animation/custom-property-animation-used-in-shorthand.html b/tests/wpt/web-platform-tests/css/css-properties-values-api/animation/custom-property-animation-used-in-shorthand.html
new file mode 100644
index 0000000000000..63f7fd3fe79bd
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-properties-values-api/animation/custom-property-animation-used-in-shorthand.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+
+@property --angle {
+  syntax: "<angle>";
+  inherits: false;
+  initial-value: 0deg;
+}
+
+@keyframes angle-animation {
+  from { --angle: 0deg }
+  to { --angle: 180deg }
+}
+
+#target {
+  animation: angle-animation 1000s linear -500s;
+  background: linear-gradient(var(--angle), black, white);
+}
+
+</style>
+
+<div id="target"></div>
+
+<script>
+
+test(() => {
+    assert_equals(getComputedStyle(target).backgroundImage, 'linear-gradient(90deg, rgb(0, 0, 0), rgb(255, 255, 255))')
+}, "Animated custom property is applied in a shorthand property.");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-016.html b/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-016.html
index e661e80915e5e..f571c9e3d328e 100644
--- a/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-016.html
+++ b/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-016.html
@@ -1,20 +1,21 @@
 <!DOCTYPE html>
-<html  lang="en" >
+<html lang="en">
 <head>
 <meta charset="utf-8">
 <title>text-align: end, pre, dir=auto</title>
 <link rel='author' title='Richard Ishida' href='mailto:ishida@w3.org'>
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
-<style type='text/css'>
-.test, .ref { border: 1px solid orange;  margin: 20px; width: 290px; color: orange; font: 24px/24px Ahem; }
-.ref { position: relative;  height: 48px; }
-.rb1 { position: absolute; top: 0; right: 0; background-color: orange; width: 72px;  height: 24px; }
-.rb2 { position: absolute; bottom: 0; left: 0; background-color: orange; width: 72px;  height: 24px; }
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">
+<style>
+.ref1, .ref2 { border-inline: 1px solid orange; margin-left: 20px; margin-right: 20px; width: 300px; color: orange; font: 25px/1 Ahem; }
+.ref1 { border-top: 1px solid orange; margin-top: 20px; text-align: right; }
+.ref2 { border-bottom: 1px solid orange; margin-bottom: 20px; text-align: left; }
 </style>
 </head>
 <body>
 <div id='instructions'>Test passes if shading in both orange boxes is identical.</div>
-<div class="ref"><div class="rb1"></div><div class="rb2"></div></div>
-<div class="ref"><div class="rb1"></div><div class="rb2"></div></div>
+<div class="ref1">REF</div>
+<div class="ref2">ERE</div>
+<div class="ref1">REF</div>
+<div class="ref2">ERE</div>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-017.html b/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-017.html
deleted file mode 100644
index 15b37fbd246ad..0000000000000
--- a/tests/wpt/web-platform-tests/css/css-text/text-align/reference/text-align-end-ref-017.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html  lang="en" >
-<head>
-<meta charset="utf-8">
-<title>text-align: end, pre, dir=auto on surrounding block</title>
-<link rel='author' title='Richard Ishida' href='mailto:ishida@w3.org'>
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
-<style type='text/css'>
-.test, .ref { border: 1px solid orange;  margin: 20px; width: 290px; color: orange; font: 24px/24px Ahem; }
-.ref { position: relative;  height: 48px; }
-#rb1 { position: absolute; top: 0; right: 0; background-color: orange; width: 72px;  height: 48px; }
-</style>
-</head>
-<body>
-<div id='instructions'>Test passes if shading in both orange boxes is identical.</div>
-<div class="ref"><div id="rb1"></div></div>
-<div class="ref"><div id="rb1"></div></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-016.html b/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-016.html
index 42495c7f3f64e..2b8a9b38298a0 100644
--- a/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-016.html
+++ b/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-016.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html  lang="en" >
+<html lang="en">
 <head>
 <meta charset="utf-8">
 <title>text-align: end, pre, dir=auto</title>
@@ -7,23 +7,25 @@
 <link rel='help' href='https://drafts.csswg.org/css-text-3/#text-align-property'>
 <link rel='match' href='reference/text-align-end-ref-016.html'>
 <meta name="assert" content="text-align:end aligns inline-level content to the end edge of the line box – ie. right when direction is auto and first strong character is ltr, and left when first strong is rtl.">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
-<style type='text/css'>
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">
+<style>
 .test { text-align: end; }
 /* the CSS below is not part of the test */
-.test, .ref { border: 1px solid orange;  margin: 20px; width: 290px; color: orange; font: 24px/24px Ahem; }
-.ref { position: relative;  height: 48px; }
-#rb1 { position: absolute; top: 0; right: 0; background-color: orange; width: 72px;  height: 24px; }
-#rb2 { position: absolute; bottom: 0; left: 0; background-color: orange; width: 72px;  height: 24px; }
+.test, .ref1, .ref2 { width: 300px; color: orange; font: 25px/1 Ahem; }
+.test { border: 1px solid orange; margin: 20px; }
+.ref1, .ref2 { border-inline: 1px solid orange; margin: 0 20px; }
+.ref1 { border-top: 1px solid orange; text-align: right; }
+.ref2 { border-bottom: 1px solid orange; text-align: left; }
 </style>
 </head>
 <body>
 <div id='instructions'>Test passes if shading in both orange boxes is identical.</div>
-<pre class="test" dir="auto">XXX
-&rlm;XXX</pre>
-<div class="ref"><div id="rb1"></div><div id="rb2"></div></div>
+<pre class="test" dir="auto">TES
+&rlm;ING</pre>
+<div class="ref1">REF</div>
+<div class="ref2">ERE</div>
 <!-- Notes:
 The &rlm isn't in the Ahem font, so it may cause a spurious effect, such as a thin white line in the middle of a block in IE. This should be ignored. The test needs a RTL character in the Ahem font, so that the &RLM can be removed.
 -->
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-017.html b/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-017.html
index 02eaa4c27193d..4420808eaaddb 100644
--- a/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-017.html
+++ b/tests/wpt/web-platform-tests/css/css-text/text-align/text-align-end-017.html
@@ -1,28 +1,27 @@
 <!DOCTYPE html>
-<html  lang="en" >
+<html lang="en">
 <head>
 <meta charset="utf-8">
 <title>text-align: end, pre, dir=auto on surrounding block</title>
 <link rel='author' title='Richard Ishida' href='mailto:ishida@w3.org'>
 <link rel='help' href='https://drafts.csswg.org/css-text-3/#text-align-property'>
-<link rel='match' href='reference/text-align-end-ref-017.html'>
+<link rel='match' href='reference/text-align-end-ref-015.html'>
 <meta name="assert" content="text-align:end aligns inline-level content to the end edge of the line box – ie. since dir=auto is not inherited by pre, to right in ltr context.">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
-<style type='text/css'>
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css">
+<style>
 .test { text-align: end; }
+.ref { text-align: right; }
 /* the CSS below is not part of the test */
-.test, .ref { border: 1px solid orange;  margin: 20px; width: 290px; color: orange; font: 24px/24px Ahem; }
-.ref { position: relative;  height: 48px; }
-#rb1 { position: absolute; top: 0; right: 0; background-color: orange; width: 72px;  height: 48px; }
+.test, .ref { border: 1px solid orange; margin: 20px; width: 300px; color: orange; font: 25px/1 Ahem; }
 </style>
 </head>
 <body>
 <div id='instructions'>Test passes if shading in both orange boxes is identical.</div>
 <div dir="auto">
-<pre class="test">XXX
-&rlm;XXX</pre>
+<pre class="test">TES
+&rlm;ING</pre>
 </div>
-<div class="ref"><div id="rb1"></div></div>
+<div class="ref">REF<br>ERE</div>
 <!-- Notes:
 The &rlm isn't in the Ahem font, so it may cause a spurious effect, such as a thin white line in the middle of a block in IE. This should be ignored. The test needs a RTL character in the Ahem font, so that the &RLM can be removed.
 The rationale for the expected outcome here is described at
diff --git a/tests/wpt/web-platform-tests/css/css-toggle/toggle-aria-roles.tentative.html b/tests/wpt/web-platform-tests/css/css-toggle/toggle-aria-roles.tentative.html
new file mode 100644
index 0000000000000..7c500fde3cbba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-toggle/toggle-aria-roles.tentative.html
@@ -0,0 +1,354 @@
+<!DOCTYPE HTML>
+<meta charset="UTF-8">
+<title>CSS Toggles: ARIA roles</title>
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="author" title="Google" href="http://www.google.com/">
+<link rel="help" href="https://tabatkins.github.io/css-toggle/">
+<link rel="help" href="https://github.com/tabatkins/css-toggle/issues/41">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/toggle-helpers.js"></script>
+<style id="style"></style>
+
+<body>
+
+<div id="container"></div>
+<script>
+
+let aria_role_tests = [
+  // Markup to create the test assertions:
+  //   data-expected-role:  The expected aria role for this element.
+  //
+  // Helper markup to create more markup:
+  //   class=group: group the group with the toggle-group property
+  //   class=group-self: same, but with the self keyword (narrow scope)
+  //   class=root: create a test-role toggle with the toggle-root property
+  //   class=root-group: same, but with the 'group' keyword
+  //   class=root-self: same, but with the 'self' keyword
+  //   class=trigger: toggle-trigger to activate test-role toggle
+  //   class=visibility: toggle-visibility connected to test-role toggle
+  `
+    <div></div>
+  `,
+  `
+    <div class="root">
+      <div></div>
+    </div>
+  `,
+  `
+    <div class="root trigger" data-expected-role="checkbox"></div>
+  `,
+  // Test that ARIA attributes override the toggle inference:
+  `
+    <div class="root trigger" role="link" data-expected-role="link"></div>
+  `,
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+    </div>
+  `,
+
+  // Radios and radio groups:
+  `
+    <div class="group" data-expected-role="radiogroup">
+      <div class="root-group trigger" data-expected-role="radio"></div>
+    </div>
+  `,
+  `
+    <div class="group" data-expected-role="radiogroup">
+      <div class="root-group trigger" data-expected-role="radio"></div>
+      <div class="root-group trigger" data-expected-role="radio"></div>
+    </div>
+  `,
+  `
+    <div>
+      <div class="root-group trigger" data-expected-role="radio"></div>
+    </div>
+  `,
+  `
+    <div style="toggle-group: another-group">
+      <div class="root-group trigger" data-expected-role="radio"></div>
+    </div>
+  `,
+  `
+    <div style="toggle-group: another-group, test-role, third-group" data-expected-role="radiogroup">
+      <div class="root-group trigger" data-expected-role="radio"></div>
+    </div>
+  `,
+
+
+  // Checkboxes and checkbox groups:
+  `
+    <div>
+      <div class="root trigger" data-expected-role="checkbox"></div>
+    </div>
+  `,
+  // TODO(dbaron): This is a checkbox group... but we can't distinguish
+  // that with current ARIA roles.
+  `
+    <div>
+      <div class="root trigger" data-expected-role="checkbox"></div>
+      <div class="root trigger" data-expected-role="checkbox"></div>
+    </div>
+  `,
+
+  // Disclosure:
+  // TODO(dbaron): This is a disclosure... but how is it possible to
+  // distinguish with ARIA roles (compare to next test!)?
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility"></div>
+    </div>
+  `,
+  // This is not a disclosure because it has a toggle-group.
+  `
+    <div class="root-group">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility"></div>
+    </div>
+  `,
+  // This is button with popup (absolute positioning)
+  // TODO(dbaron): This test doesn't actually distinguish this from
+  // disclosure because the internal kPopUpButton role maps to "button"
+  // in kReverseRoles in ax_object.cc.
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility" style="position: absolute"></div>
+    </div>
+  `,
+  // This is button with popup (fixed positioning)
+  // TODO(dbaron): This test doesn't actually distinguish this from
+  // disclosure because the internal kPopUpButton role maps to "button"
+  // in kReverseRoles in ax_object.cc.
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility" style="position: fixed"></div>
+    </div>
+  `,
+  // This is button with popup (popover)
+  // TODO(dbaron): This test doesn't actually distinguish this from
+  // disclosure because the internal kPopUpButton role maps to "button"
+  // in kReverseRoles in ax_object.cc.
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility" popover="auto"></div>
+    </div>
+  `,
+  // This is disclosure (NOT button with popup) (sticky positioning)
+  `
+    <div class="root">
+      <div class="trigger" data-expected-role="button"></div>
+      <div class="visibility" style="position: sticky"></div>
+    </div>
+  `,
+
+  // Accordion:
+  `
+    <div class="group">
+      <div class="root-group" data-expected-role="region">
+        <div class="trigger" data-expected-role="button"></div>
+        <div class="visibility"></div>
+      </div>
+      <div class="root-group" data-expected-role="region">
+        <div class="trigger" data-expected-role="button"></div>
+        <div class="visibility"></div>
+      </div>
+    </div>
+  `,
+  // Not accordion because of other siblings:
+  `
+    <div class="group">
+      <div class="root-group">
+        <div class="trigger" data-expected-role="button"></div>
+        <div class="visibility"></div>
+      </div>
+      <div class="root-group">
+        <div class="trigger" data-expected-role="button"></div>
+        <div class="visibility"></div>
+      </div>
+      <div></div>
+      <div></div>
+      <div></div>
+    </div>
+  `,
+
+  // Tree:
+  // TODO(dbaron): This should probably also work with the toggles on
+  // the <button>!
+  // TODO(dbaron): This should probably mark the non-interactive items
+  // as treeitem as well!
+  // TODO(dbaron): Do the elements getting the roles here make sense?
+  // TODO(dbaron): The requirement for having multiple disclosure-ish
+  // children to qualify as accordion-ish probably doesn't make sense
+  // here.  The test below is basically the minimal example that gets
+  // detected as a tree, but simpler things definitely should be!
+  // TODO(dbaron): The inner parts of the tree should also be getting
+  // tree roles!
+  `
+    <ul data-expected-role="tree">
+      <li class="root-self" data-expected-role="group">
+        <button class="trigger" data-expected-role="treeitem"></button>
+        <ul class="visibility" data-expected-role="list">
+          <li>item</li>
+          <li class="root-self">
+            <button class="trigger" data-expected-role="button"></button>
+            <ul class="visibility" data-expected-role="list">
+              <li>item</li>
+              <li>item</li>
+            </ul>
+          </li>
+          <li class="root-self">
+            <button class="trigger" data-expected-role="button"></button>
+            <ul class="visibility" data-expected-role="list">
+              <li>item</li>
+              <li>item</li>
+            </ul>
+          </li>
+        </ul>
+      </li>
+      <li class="root-self" data-expected-role="group">
+        <button class="trigger" data-expected-role="treeitem"></button>
+        <ul class="visibility" data-expected-role="list">
+          <li class="root-self">
+            <button class="trigger" data-expected-role="button"></button>
+            <ul class="visibility" data-expected-role="list">
+              <li>item</li>
+              <li>item</li>
+            </ul>
+          </li>
+          <li class="root-self">
+            <button class="trigger" data-expected-role="button"></button>
+            <ul class="visibility" data-expected-role="list">
+              <li>item</li>
+              <li>item</li>
+            </ul>
+          </li>
+        </ul>
+      </li>
+    </ul>
+  `,
+
+  // Tabs:
+  `
+    <section class="group" data-expected-role="tablist">
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+    </section>
+  `,
+  `
+    <section class="group" data-expected-role="tablist">
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <div></div>
+    </section>
+  `,
+  `
+    <section class="group" data-expected-role="tablist">
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 style="toggle-root: other-toggle; toggle-trigger: other-toggle" data-expected-role="checkbox"></h1>
+    </section>
+  `,
+  `
+    <section class="group" data-expected-role="tablist">
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 class="root-group trigger" data-expected-role="tab"></h1>
+      <div class="visibility" data-expected-role="tabpanel"></div>
+      <h1 style="toggle-root: other-toggle; toggle-trigger: other-toggle" data-expected-role="button"></h1>
+      <div style="toggle-visibility: toggle other-toggle"></div>
+    </section>
+  `,
+  // TODO(https://crbug.com/758089): The expected role for the <section>
+  // should be generic rather than null!
+  `
+    <section class="group" data-expected-role="null">
+      <h1 class="root-group trigger" data-expected-role="button"></h1>
+      <div class="visibility"></div>
+      <h1 class="root-group trigger" data-expected-role="button"></h1>
+      <div class="visibility"></div>
+      <div></div>
+      <div></div>
+      <div></div>
+      <div></div>
+    </section>
+  `,
+  `
+    <section class="group" data-expected-role="radiogroup">
+      <h1 class="root-group trigger" data-expected-role="radio"></h1>
+      <h1 class="root-group trigger" data-expected-role="radio"></h1>
+      <div></div>
+      <div></div>
+      <div></div>
+      <div></div>
+    </section>
+  `,
+];
+
+for (let t of aria_role_tests) {
+  promise_test(async function() {
+    container.innerHTML = t;
+
+    for (let e of container.querySelectorAll('.group')) {
+      e.style.toggleGroup = "test-role";
+    }
+    for (let e of container.querySelectorAll('.group-self')) {
+      e.style.toggleGroup = "test-role self";
+    }
+    for (let e of container.querySelectorAll('.root')) {
+      e.style.toggleRoot = "test-role";
+    }
+    for (let e of container.querySelectorAll('.root-group')) {
+      e.style.toggleRoot = "test-role group";
+    }
+    for (let e of container.querySelectorAll('.root-self')) {
+      e.style.toggleRoot = "test-role self";
+    }
+    for (let e of container.querySelectorAll('.trigger')) {
+      e.style.toggleTrigger = "test-role";
+    }
+    for (let e of container.querySelectorAll('.visibility')) {
+      e.style.toggleVisibility = "toggle test-role";
+    }
+
+    for (let e of container.querySelectorAll('.root, .root-nogroup')) {
+      await wait_for_toggle_creation(e);
+    }
+
+    let count = 0;
+    for (let e of container.querySelectorAll("*")) {
+      if (e == container)
+        continue;
+
+      let expected_role = "generic";
+      if (e.hasAttribute("data-expected-role")) {
+        expected_role = e.getAttribute("data-expected-role");
+        // TODO(https://crbug.com/758089): See above regarding <section>;
+        // this null handling should eventually be removed.
+        if (expected_role === "null") {
+          expected_role = null;
+        }
+      }
+      ++count;
+      // NOTE:  This relies on Element.computedRole, which is an
+      // experimental feature behind the ComputedAccessibilityInfo flag
+      // in blink.
+      assert_equals(e.computedRole, expected_role, `role on ${e.tagName} element (#${count})`);
+    }
+
+  }, `aria role test: ${t}`);
+}
+
+</script>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/mq-non-matching-lazy-load.html b/tests/wpt/web-platform-tests/css/mediaqueries/mq-non-matching-lazy-load.tentative.html
similarity index 100%
rename from tests/wpt/web-platform-tests/css/mediaqueries/mq-non-matching-lazy-load.html
rename to tests/wpt/web-platform-tests/css/mediaqueries/mq-non-matching-lazy-load.tentative.html
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/overflow-media-features.html b/tests/wpt/web-platform-tests/css/mediaqueries/overflow-media-features.html
new file mode 100644
index 0000000000000..fb983318427f3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/overflow-media-features.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<title>CSS Media Queries Test: overflow media features</title>
+<link rel="help" href="https://drafts.csswg.org/mediaqueries-4/#descdef-media-update">
+<meta assert="The test is supposed to be run on computer displays as it will no match otherwise">
+<script type="text/javascript" src="/resources/testharness.js"></script>
+<script type="text/javascript" src="/resources/testharnessreport.js"></script>
+<script type="text/javascript" src="resources/matchmedia-utils.js"></script>
+
+<script>
+query_should_be_known("(overflow-inline)");
+query_should_be_known("(overflow-inline: none)");
+query_should_be_known("(overflow-inline: scroll)");
+
+query_should_be_unknown("overflow-inline");
+query_should_be_unknown("(overflow-inline: ?)");
+query_should_be_unknown("(overflow-inline: 10px)");
+query_should_be_unknown("(overflow-inline: 0)");
+
+query_should_be_known("(overflow-block)");
+query_should_be_known("(overflow-block: none)");
+query_should_be_known("(overflow-block: scroll)");
+query_should_be_known("(overflow-block: paged)");
+
+query_should_be_unknown("overflow-block");
+query_should_be_unknown("(overflow-block: ?)");
+query_should_be_unknown("(overflow-block: 10px)");
+query_should_be_unknown("(overflow-block: 0)");
+
+test(() => {
+  let match_standard = window.matchMedia("(overflow-inline: scroll)");
+  assert_true(match_standard.matches);
+}, "Check that overflow-inline: scroll always matches non printing documents");
+
+test(() => {
+  let match_standard = window.matchMedia("(overflow-block: scroll)");
+  assert_true(match_standard.matches);
+}, "Check that overflow-block: scroll always matches non printing documents");
+
+test(() => {
+  let match_standard = window.matchMedia("(overflow-inline: none)");
+  assert_false(match_standard.matches);
+}, "Check that overflow-inline: none doesn't match non printing documents");
+
+test(() => {
+  let match_standard = window.matchMedia("(overflow-block: none)");
+  assert_false(match_standard.matches);
+}, "Check that overflow-block: none doesn't match non printing documents");
+
+test(() => {
+  let match_standard = window.matchMedia("(overflow-block: paged)");
+  assert_false(match_standard.matches);
+}, "Check that overflow-block: paged doesn't match non printing documents");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/test_media_queries.html b/tests/wpt/web-platform-tests/css/mediaqueries/test_media_queries.html
index 6a91c1119ddf7..fe3ba8195f981 100644
--- a/tests/wpt/web-platform-tests/css/mediaqueries/test_media_queries.html
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/test_media_queries.html
@@ -589,7 +589,7 @@
     expression_should_be_known("overflow-block: none")
     expression_should_be_known("overflow-block: paged")
     expression_should_be_known("overflow-block: scroll")
-    expression_should_be_known("overflow-block: optional-paged")
+    expression_should_be_unknown("overflow-block: optional-paged")
     expression_should_be_unknown("overflow-block: some-random-invalid-thing")
 
     // Sanity check for overflow-block
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-containing-ancestor.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-containing-ancestor.html
new file mode 100644
index 0000000000000..f3a63bdb2e5ad
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-containing-ancestor.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of S) with ancestor in S</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-child-containing-ancestor-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  div:nth-last-child(odd of .a .b) {
+    color: green;
+  }
+</style>
+<div id="toggler">
+  <div>
+    <div>
+      <div class="b">Should be green</div>
+    </div>
+  </div>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("a");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root-ref.html
new file mode 100644
index 0000000000000..3eb330f58c50e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root-ref.html
@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <div style="color: green">Should be green</div>
+  <div>No green</div>
+  <div>No green</div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root.html
new file mode 100644
index 0000000000000..7cbd2e6687714
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-in-shadow-root.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of class) within shadow root</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-in-shadow-root-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<script src="/resources/declarative-shadow-dom-polyfill.js"></script>
+<div id="host">
+  <template shadowroot="open">
+    <style>
+      div:nth-last-child(even of .foo) {
+        color: green;
+      }
+    </style>
+    <div class="foo">Should be green</div>
+    <div class="foo">No green</div>
+    <div class="foo" id="toggler">No green</div>
+  </template>
+</div>
+<script>
+  host.offsetTop;
+  host.shadowRoot.getElementById("toggler").classList.toggle("foo");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr-ref.html
new file mode 100644
index 0000000000000..6d0eb88a8112d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr-ref.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Not ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Selectively ignored</p>
+  <p>Not ignored</p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr.html
new file mode 100644
index 0000000000000..9381796bf1636
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-attr.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of attribute)</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-of-attr-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  p:nth-last-child(even of [attr="yes"]) {
+    color: green;
+  }
+</style>
+<div>
+  <p>Ignored</p>
+  <p attr="yes">Not ignored</p>
+  <p attr="yes">Not ignored</p>
+  <p attr="yes">Not ignored</p>
+  <p attr="yes" id="toggler">Selectively ignored</p>
+  <p attr="yes">Not ignored</p>
+  <p attr="no">Ignored</p>
+  <p>Ignored</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.setAttribute("attr", "no");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class-ref.html
new file mode 100644
index 0000000000000..6d0eb88a8112d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class-ref.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Not ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Selectively ignored</p>
+  <p>Not ignored</p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class.html
new file mode 100644
index 0000000000000..2026796bb927c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-class.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of class)</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-of-class-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  p:nth-last-child(even of .c) {
+    color: green;
+  }
+</style>
+<div>
+  <p>Ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c" id="toggler">Selectively ignored</p>
+  <p class="c">Not ignored</p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("c");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has-ref.html
new file mode 100644
index 0000000000000..6d0eb88a8112d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has-ref.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Not ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Selectively ignored</p>
+  <p>Not ignored</p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has.html
new file mode 100644
index 0000000000000..0c80925f87ab0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-has.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of :has(...))</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-of-has-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  p:nth-last-child(even of :has(.c)) {
+    color: green;
+  }
+</style>
+<div>
+  <p>Ignored</p>
+  <p>Not <span class="c">ignored</span></p>
+  <p>Not <span class="c">ignored</span></p>
+  <p>Not <span class="c">ignored</span></p>
+  <p>Selectively <span><span><span class="c" id="toggler"></span></span></span>ignored</p>
+  <p>Not <span class="c">ignored</span></p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("c");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor-ref.html
new file mode 100644
index 0000000000000..21e6ae0f6f8c5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor-ref.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p>Not <span>ignored</span></p>
+  <p>Not <span style="color: green">ignored</span></p>
+  <p>Not <span>ignored</span></p>
+  <p>Selectively <span>ignored</span></p>
+  <p>Not <span style="color: green">ignored</span></p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor.html
new file mode 100644
index 0000000000000..b4e0e6f4f6bec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-in-ancestor.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of class) as ancestor</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-of-in-ancestor-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  p:nth-last-child(odd of .c) span {
+    color: green;
+  }
+</style>
+<div>
+  <p>Ignored</p>
+  <p class="c">Not <span>ignored</span></p>
+  <p class="c">Not <span>ignored</span></p>
+  <p class="c">Not <span>ignored</span></p>
+  <p class="c" id="toggler">Selectively <span>ignored</span></p>
+  <p class="c">Not <span>ignored</span></p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("c");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling-ref.html
new file mode 100644
index 0000000000000..349a7b66fb5f4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling-ref.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Ignored</p>
+  <p>Not ignored</p>
+  <p>Ignored</p>
+  <p>Selectively ignored</p>
+  <p>Ignored</p>
+  <p>Ignored</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling.html
new file mode 100644
index 0000000000000..b7b9bd70ab8e3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-of-sibling.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of sibling)</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-of-sibling-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  p:nth-last-child(even of .a + .b) {
+    color: green;
+  }
+</style>
+<div>
+  <p class="a">Ignored</p>
+  <p class="b">Not ignored</p>
+  <p class="a">Ignored</p>
+  <p class="b">Not ignored</p>
+  <p class="a">Ignored</p>
+  <p class="b" id="toggler">Selectively ignored</p>
+  <p class="a">Ignored</p>
+  <p>Ignored</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("b");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes-ref.html
new file mode 100644
index 0000000000000..48eeb7b3c67e4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes-ref.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div id="toggler">
+  <p>Ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Not ignored</p>
+  <p style="color: green">Not ignored</p>
+  <p>Not ignored</p>
+  <p>Ignored</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html
new file mode 100644
index 0000000000000..1cc7020e5b1a9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-ancestor-changes.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of class) when ancestor changes</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-when-ancestor-changes-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  .ancestor :nth-last-child(even of .c) {
+    color: green;
+  }
+</style>
+<div id="toggler">
+  <p>Ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c">Not ignored</p>
+  <p class="c">Not ignored</p>
+  <p>Ignored</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("ancestor");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes-ref.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes-ref.html
new file mode 100644
index 0000000000000..627ebc074bf43
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes-ref.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>CSS Test Reference</title>
+<div>
+  <p>Ignored</p>
+  <p>Odd; used to be green, should not be since no sibling</p>
+  <p>Even, so should not be green</p>
+  <p>Odd, but no sibling, so should not be green</p>
+  <p>Even, so should not be green</p>
+  <p>Ignored</p>
+  <p style="color: green">Odd, should be green</p>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes.html b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes.html
new file mode 100644
index 0000000000000..a8c2156483846
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/invalidation/nth-last-child-when-sibling-changes.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS Selectors Invalidation: :nth-last-child(... of class) when sibling changes</title>
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<link rel="author" title="Steinar H. Gunderson" href="mailto:sesse@chromium.org">
+<link rel="match" href="nth-last-child-when-sibling-changes-ref.html">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
+<style>
+  .sibling + :nth-last-child(odd of .c) {
+    color: green;
+  }
+</style>
+<div>
+  <p class="sibling" id="toggler">Ignored</p>
+  <p class="c">Odd; used to be green, should not be since no sibling</p>
+  <p class="c">Even, so should not be green</p>
+  <p class="c" class="sibling">Odd, but no sibling, so should not be green</p>
+  <p class="c">Even, so should not be green</p>
+  <p class="sibling">Ignored</p>
+  <p class="c">Odd, should be green</p>
+</div>
+<script>
+  document.documentElement.offsetTop;
+  toggler.classList.toggle("sibling");
+</script>
diff --git a/tests/wpt/web-platform-tests/dom/nodes/Node-lookupNamespaceURI.html b/tests/wpt/web-platform-tests/dom/nodes/Node-lookupNamespaceURI.html
index 74c1ac8bd755f..925c52836214a 100644
--- a/tests/wpt/web-platform-tests/dom/nodes/Node-lookupNamespaceURI.html
+++ b/tests/wpt/web-platform-tests/dom/nodes/Node-lookupNamespaceURI.html
@@ -26,6 +26,7 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 lookupNamespaceURI(frag, null, null, 'DocumentFragment should have null namespace, prefix null');
 lookupNamespaceURI(frag, '', null, 'DocumentFragment should have null namespace, prefix ""');
 lookupNamespaceURI(frag, 'foo', null, 'DocumentFragment should have null namespace, prefix "foo"');
+lookupNamespaceURI(frag, 'xml', null, 'DocumentFragment should have null namespace, prefix "xml"');
 lookupNamespaceURI(frag, 'xmlns', null, 'DocumentFragment should have null namespace, prefix "xmlns"');
 isDefaultNamespace(frag, null, true, 'DocumentFragment is in default namespace, prefix null');
 isDefaultNamespace(frag, '', true, 'DocumentFragment is in default namespace, prefix ""');
@@ -36,6 +37,7 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 lookupNamespaceURI(docType, null, null, 'DocumentType should have null namespace, prefix null');
 lookupNamespaceURI(docType, '', null, 'DocumentType should have null namespace, prefix ""');
 lookupNamespaceURI(docType, 'foo', null, 'DocumentType should have null namespace, prefix "foo"');
+lookupNamespaceURI(docType, 'xml', null, 'DocumentType should have null namespace, prefix "xml"');
 lookupNamespaceURI(docType, 'xmlns', null, 'DocumentType should have null namespace, prefix "xmlns"');
 isDefaultNamespace(docType, null, true, 'DocumentType is in default namespace, prefix null');
 isDefaultNamespace(docType, '', true, 'DocumentType is in default namespace, prefix ""');
@@ -44,23 +46,25 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 
 var fooElem = document.createElementNS('fooNamespace', 'prefix:elem');
 fooElem.setAttribute('bar', 'value');
-
+const XMLNS_NS = 'http://www.w3.org/2000/xmlns/';
+const XML_NS =  'http://www.w3.org/XML/1998/namespace';
 lookupNamespaceURI(fooElem, null, null, 'Element should have null namespace, prefix null');
 lookupNamespaceURI(fooElem, '', null, 'Element should have null namespace, prefix ""');
 lookupNamespaceURI(fooElem, 'fooNamespace', null, 'Element should not have namespace matching prefix with namespaceURI value');
-lookupNamespaceURI(fooElem, 'xmlns', null, 'Element should not have XMLNS namespace');
+lookupNamespaceURI(fooElem, 'xml', XML_NS, 'Element should have XML namespace');
+lookupNamespaceURI(fooElem, 'xmlns', XMLNS_NS, 'Element should have XMLNS namespace');
 lookupNamespaceURI(fooElem, 'prefix', 'fooNamespace', 'Element has namespace URI matching prefix');
 isDefaultNamespace(fooElem, null, true, 'Empty namespace is not default, prefix null');
 isDefaultNamespace(fooElem, '', true, 'Empty namespace is not default, prefix ""');
 isDefaultNamespace(fooElem, 'fooNamespace', false, 'fooNamespace is not default');
-isDefaultNamespace(fooElem, 'http://www.w3.org/2000/xmlns/', false, 'xmlns namespace is not default');
+isDefaultNamespace(fooElem, XMLNS_NS, false, 'xmlns namespace is not default');
 
-fooElem.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:bar', 'barURI');
-fooElem.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns', 'bazURI');
+fooElem.setAttributeNS(XMLNS_NS, 'xmlns:bar', 'barURI');
+fooElem.setAttributeNS(XMLNS_NS, 'xmlns', 'bazURI');
 
 lookupNamespaceURI(fooElem, null, 'bazURI', 'Element should have baz namespace, prefix null');
 lookupNamespaceURI(fooElem, '', 'bazURI', 'Element should have baz namespace, prefix ""');
-lookupNamespaceURI(fooElem, 'xmlns', null, 'Element does not has namespace with xlmns prefix');
+lookupNamespaceURI(fooElem, 'xmlns', XMLNS_NS, 'Element should have namespace with xmlns prefix');
 lookupNamespaceURI(fooElem, 'bar', 'barURI', 'Element has bar namespace');
 
 isDefaultNamespace(fooElem, null, false, 'Empty namespace is not default on fooElem, prefix null');
@@ -79,7 +83,7 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 isDefaultNamespace(comment, null, false, 'For comment, empty namespace is not default, prefix null');
 isDefaultNamespace(comment, '', false, 'For comment, empty namespace is not default, prefix ""');
 isDefaultNamespace(comment, 'fooNamespace', false, 'For comment, fooNamespace is not default');
-isDefaultNamespace(comment, 'http://www.w3.org/2000/xmlns/', false, 'For comment, xmlns namespace is not default');
+isDefaultNamespace(comment, XMLNS_NS, false, 'For comment, xmlns namespace is not default');
 isDefaultNamespace(comment, 'barURI', false, 'For comment, inherited bar namespace is not default');
 isDefaultNamespace(comment, 'bazURI', true, 'For comment, inherited baz namespace is default');
 
@@ -88,19 +92,19 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 
 lookupNamespaceURI(fooChild, null, 'childNamespace', 'Child element should inherit baz namespace');
 lookupNamespaceURI(fooChild, '', 'childNamespace', 'Child element should have null namespace');
-lookupNamespaceURI(fooChild, 'xmlns', null, 'Child element should not have XMLNS namespace');
+lookupNamespaceURI(fooChild, 'xmlns', XMLNS_NS, 'Child element should have XMLNS namespace');
 lookupNamespaceURI(fooChild, 'prefix', 'fooNamespace', 'Child element has namespace URI matching prefix');
 
 isDefaultNamespace(fooChild, null, false, 'Empty namespace is not default for child, prefix null');
 isDefaultNamespace(fooChild, '', false, 'Empty namespace is not default for child, prefix ""');
 isDefaultNamespace(fooChild, 'fooNamespace', false, 'fooNamespace is not default for child');
-isDefaultNamespace(fooChild, 'http://www.w3.org/2000/xmlns/', false, 'xmlns namespace is not default for child');
+isDefaultNamespace(fooChild, XMLNS_NS, false, 'xmlns namespace is not default for child');
 isDefaultNamespace(fooChild, 'barURI', false, 'bar namespace is not default for child');
 isDefaultNamespace(fooChild, 'bazURI', false, 'baz namespace is default for child');
 isDefaultNamespace(fooChild, 'childNamespace', true, 'childNamespace is default for child');
 
-document.documentElement.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:bar', 'barURI');
-document.documentElement.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns', 'bazURI');
+document.documentElement.setAttributeNS(XMLNS_NS, 'xmlns:bar', 'barURI');
+document.documentElement.setAttributeNS(XMLNS_NS, 'xmlns', 'bazURI');
 
 lookupNamespaceURI(document, null, 'http://www.w3.org/1999/xhtml', 'Document should have xhtml namespace, prefix null');
 lookupNamespaceURI(document, '', 'http://www.w3.org/1999/xhtml', 'Document should have xhtml namespace, prefix ""');
@@ -110,11 +114,22 @@ <h1>LookupNamespaceURI and IsDefaultNamespace</h1>
 isDefaultNamespace(document, null, false, 'For document, empty namespace is not default, prefix null');
 isDefaultNamespace(document, '', false, 'For document, empty namespace is not default, prefix ""');
 isDefaultNamespace(document, 'fooNamespace', false, 'For document, fooNamespace is not default');
-isDefaultNamespace(document, 'http://www.w3.org/2000/xmlns/', false, 'For document, xmlns namespace is not default');
+isDefaultNamespace(document, XMLNS_NS, false, 'For document, xmlns namespace is not default');
 isDefaultNamespace(document, 'barURI', false, 'For document, bar namespace is not default');
 isDefaultNamespace(document, 'bazURI', false, 'For document, baz namespace is not default');
 isDefaultNamespace(document, 'http://www.w3.org/1999/xhtml', true, 'For document, xhtml namespace is default');
 
+const doc = new Document();
+lookupNamespaceURI(doc, 'xml', null, 'Document without documentElement has no namespace URI matching "xml"');
+lookupNamespaceURI(doc, 'xmlns', null, 'Document without documentElement has no namespace URI matching "xmlns"');
+
+const attr = document.createAttribute('foo');
+lookupNamespaceURI(attr, 'xml', null, 'Disconnected Attr has no namespace URI matching "xml"');
+lookupNamespaceURI(attr, 'xmlns', null, 'Disconnected Attr has no namespace URI matching "xmlns"');
+document.body.setAttributeNode(attr);
+lookupNamespaceURI(attr, 'xml', XML_NS, 'Connected Attr has namespace URI matching "xml"');
+lookupNamespaceURI(attr, 'xmlns', XMLNS_NS, 'Connected Attr no namespace URI matching "xmlns"');
+
 var comment = document.createComment('comment');
 document.appendChild(comment);
 lookupNamespaceURI(comment, 'bar', null, 'Comment does not have bar namespace');
diff --git a/tests/wpt/web-platform-tests/domxpath/xpathevaluatorbase-creatensresolver.html b/tests/wpt/web-platform-tests/domxpath/xpathevaluatorbase-creatensresolver.html
new file mode 100644
index 0000000000000..8f6c58fe60acd
--- /dev/null
+++ b/tests/wpt/web-platform-tests/domxpath/xpathevaluatorbase-creatensresolver.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<script src='/resources/testharness.js'></script>
+<script src='/resources/testharnessreport.js'></script>
+<body>
+<script>
+[document, new XPathEvaluator()].forEach(evaluator => {
+  test(() => {
+    assert_equals(evaluator.createNSResolver(document), document, 'Document');
+    const fragment = document.createDocumentFragment();
+    assert_equals(evaluator.createNSResolver(fragment), fragment,
+                  'DocumentFragment');
+    assert_equals(evaluator.createNSResolver(document.doctype),
+                  document.doctype, 'DocumentType');
+    assert_equals(evaluator.createNSResolver(document.body), document.body,
+                  'Element');
+    assert_equals(evaluator.createNSResolver(document.body.firstChild),
+                  document.body.firstChild, 'Text');
+    const attr = document.createAttribute('foo');
+    assert_equals(evaluator.createNSResolver(attr), attr, 'Attr');
+  }, `createNSResolver() should return the specified node as is. (${evaluator.constructor.name})`);
+
+  function createAndLookup(evaluator, node) {
+    return evaluator.createNSResolver(node).lookupNamespaceURI('xml');
+  }
+
+  test(() => {
+    assert_equals(createAndLookup(evaluator, new Document()), null, 'Document');
+    assert_equals(createAndLookup(evaluator, new DocumentFragment()), null,
+                  'DocumentFragment');
+    assert_equals(createAndLookup(evaluator, document.doctype), null,
+                  'DocumentType');
+    assert_equals(createAndLookup(evaluator, document.createElement('body')),
+                  'http://www.w3.org/XML/1998/namespace', 'Element');
+    assert_equals(createAndLookup(evaluator, document.createTextNode('foo')),
+                  null, 'Text');
+    assert_equals(createAndLookup(evaluator, document.createAttribute('bar')),
+                  null, 'Attr');
+  }, `createNSResolver() resultant object should not add support of 'xml' prefix. (${evaluator.constructor.name})`);
+});
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/fetch/api/abort/general.any.js b/tests/wpt/web-platform-tests/fetch/api/abort/general.any.js
index e9e8e93d30f33..7bf98ba9b2479 100644
--- a/tests/wpt/web-platform-tests/fetch/api/abort/general.any.js
+++ b/tests/wpt/web-platform-tests/fetch/api/abort/general.any.js
@@ -519,6 +519,7 @@ promise_test(async t => {
   const fetchPromise = fetch('../resources/empty.txt', {
     body, signal,
     method: 'POST',
+    duplex: 'half',
     headers: {
       'Content-Type': 'text/plain'
     }
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/resources/shared-worker-blob-fetcher.html b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/shared-worker-blob-fetcher.html
new file mode 100644
index 0000000000000..a79869b2f9624
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/shared-worker-blob-fetcher.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>SharedWorker Blob Fetcher</title>
+<script>
+  window.addEventListener("message", function (evt) {
+    let { url } = evt.data;
+
+    const workerScriptContent = `
+      async function doFetch(url) {
+        const response = await fetch(url);
+        const body = await response.text();
+        return {
+          status: response.status,
+          body,
+        };
+      }
+
+      async function fetchAndPost(url, port) {
+        try {
+          const message = await doFetch(url);
+          port.postMessage(message);
+        } catch(e) {
+          port.postMessage({ error: e.name });
+        }
+      }
+
+      const url = "${url}";
+
+      self.addEventListener("connect", async (evt) => {
+        await fetchAndPost(url, evt.ports[0]);
+      });
+    `;
+    const blob =
+        new Blob([workerScriptContent], {type: 'application/javascript'});
+    const workerScriptUrl = URL.createObjectURL(blob);
+
+    const worker = new SharedWorker(workerScriptUrl);
+
+    URL.revokeObjectURL(workerScriptUrl);
+
+    worker.onerror = (evt) => {
+      parent.postMessage({ error: evt.message || "unknown error" }, "*");
+    };
+
+    worker.port.addEventListener("message", (evt) => {
+      parent.postMessage(evt.data, "*");
+    });
+    worker.port.start();
+  });
+</script>
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/resources/support.sub.js b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/support.sub.js
index a104021d158d9..29942a2111f61 100644
--- a/tests/wpt/web-platform-tests/fetch/private-network-access/resources/support.sub.js
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/support.sub.js
@@ -671,3 +671,21 @@ async function sharedWorkerFetchTest(t, { source, target, expected }) {
   assert_equals(status, expected.status, "response status");
   assert_equals(message, expected.message, "response body");
 }
+
+async function sharedWorkerBlobFetchTest(t, { source, target, expected }) {
+  const targetUrl = preflightUrl(target);
+
+  const fetcherUrl = resolveUrl(
+      'resources/shared-worker-blob-fetcher.html',
+      sourceResolveOptions(source));
+
+  const reply = futureMessage();
+  const iframe = await appendIframe(t, document, fetcherUrl);
+
+  iframe.contentWindow.postMessage({ url: targetUrl.href }, "*");
+
+  const { error, status, message } = await reply;
+  assert_equals(error, expected.error, "fetch error");
+  assert_equals(status, expected.status, "response status");
+  assert_equals(message, expected.message, "response body");
+}
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/resources/worker-blob-fetcher.html b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/worker-blob-fetcher.html
index 18a454b7fa362..5a50271e11b57 100644
--- a/tests/wpt/web-platform-tests/fetch/private-network-access/resources/worker-blob-fetcher.html
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/resources/worker-blob-fetcher.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8">
-<title>Worker Fetcher</title>
+<title>Worker Blob Fetcher</title>
 <script>
   window.addEventListener("message", function (evt) {
     const { url } = evt.data;
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.https.window.js b/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.https.window.js
new file mode 100644
index 0000000000000..ad9cd09c31b0a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.https.window.js
@@ -0,0 +1,153 @@
+// META: script=/common/utils.js
+// META: script=resources/support.sub.js
+//
+// Spec: https://wicg.github.io/private-network-access/#integration-fetch
+//
+// These tests check that fetches from within `SharedWorker` scripts that are
+// loaded from blob URLs are subject to Private Network Access checks, just like
+// fetches from within documents.
+//
+// This file covers only those tests that must execute in a non-secure context.
+// Other tests are defined in: shared-worker-blob-fetch.https.window.js
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_LOCAL },
+  target: { server: Server.HTTPS_LOCAL },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "local to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PRIVATE },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "private to local: failed preflight.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PRIVATE },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.success(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "private to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PRIVATE },
+  target: { server: Server.HTTPS_PRIVATE },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "private to private: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public to local: failed preflight.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.success(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "public to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTPS_PRIVATE,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public to private: failed preflight.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTPS_PRIVATE,
+    behavior: {
+      preflight: PreflightBehavior.success(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "public to private: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: { server: Server.HTTPS_PUBLIC },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "public to public: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTPS_LOCAL,
+    treatAsPublic: true,
+  },
+  target: { server: Server.HTTPS_LOCAL },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "treat-as-public to local: failed preflight.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTPS_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: { preflight: PreflightBehavior.success(token()) },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "treat-as-public to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTPS_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTPS_PRIVATE,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "treat-as-public to private: failed preflight.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTPS_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTPS_PRIVATE,
+    behavior: {
+      preflight: PreflightBehavior.success(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "treat-as-public to private: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTPS_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTPS_PUBLIC,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "treat-as-public to public: success.");
+
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.window.js b/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.window.js
new file mode 100644
index 0000000000000..d430ea7383771
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/shared-worker-blob-fetch.window.js
@@ -0,0 +1,173 @@
+// META: script=/common/utils.js
+// META: script=resources/support.sub.js
+//
+// Spec: https://wicg.github.io/private-network-access/#integration-fetch
+//
+// These tests check that fetches from within `SharedWorker` scripts that are
+// loaded from blob URLs are subject to Private Network Access checks, just like
+// fetches from within documents.
+//
+// This file covers only those tests that must execute in a non-secure context.
+// Other tests are defined in: shared-worker-blob-fetch.https.window.js
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_LOCAL },
+  target: { server: Server.HTTP_LOCAL },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "local to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_PRIVATE },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "private to local: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_PRIVATE },
+  target: { server: Server.HTTP_PRIVATE },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "private to private: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_PUBLIC },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public to local: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_PUBLIC },
+  target: {
+    server: Server.HTTP_PRIVATE,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public to private: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTP_PUBLIC },
+  target: { server: Server.HTTP_PUBLIC },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "public to public: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTP_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: { preflight: PreflightBehavior.optionalSuccess(token()) },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "treat-as-public to local: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTP_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTP_PRIVATE,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "treat-as-public to private: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: {
+    server: Server.HTTP_LOCAL,
+    treatAsPublic: true,
+  },
+  target: {
+    server: Server.HTTP_PUBLIC,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "treat-as-public to public: success.");
+
+// The following tests verify that workers served over HTTPS are not allowed to
+// make private network requests because they are not secure contexts.
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_LOCAL },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "local https to local: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "private https to local: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTP_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public https to local: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_LOCAL },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: { response: ResponseBehavior.allowCrossOrigin() },
+  },
+  expected: WorkerFetchTestResult.SUCCESS,
+}), "local https to local https: success.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PRIVATE },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "private https to local https: failure.");
+
+promise_test(t => sharedWorkerBlobFetchTest(t, {
+  source: { server: Server.HTTPS_PUBLIC },
+  target: {
+    server: Server.HTTPS_LOCAL,
+    behavior: {
+      preflight: PreflightBehavior.optionalSuccess(token()),
+      response: ResponseBehavior.allowCrossOrigin(),
+    },
+  },
+  expected: WorkerFetchTestResult.FAILURE,
+}), "public https to local https: failure.");
diff --git a/tests/wpt/web-platform-tests/fetch/private-network-access/worker-blob-fetch.window.js b/tests/wpt/web-platform-tests/fetch/private-network-access/worker-blob-fetch.window.js
index 80374143a283f..27cfa155c14ca 100644
--- a/tests/wpt/web-platform-tests/fetch/private-network-access/worker-blob-fetch.window.js
+++ b/tests/wpt/web-platform-tests/fetch/private-network-access/worker-blob-fetch.window.js
@@ -8,7 +8,7 @@
 // within documents.
 //
 // This file covers only those tests that must execute in a non-secure context.
-// Other tests are defined in: worker-fetch.https.window.js
+// Other tests are defined in: worker-blob-fetch.https.window.js
 
 promise_test(t => workerBlobFetchTest(t, {
   source: { server: Server.HTTP_LOCAL },
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone-expected.html
new file mode 100644
index 0000000000000..607526e437628
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone-expected.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.endlayer.alone</title>
+<h1>2d.layer.endlayer.alone</h1>
+<p class="desc">A test to make sure a single endLayer with no beginLayer is a no-op.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone.html
new file mode 100644
index 0000000000000..a7a5933b33d0d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.alone.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.endlayer.alone-expected.html">
+<title>Canvas test: 2d.layer.endlayer.alone</title>
+<h1>2d.layer.endlayer.alone</h1>
+<p class="desc">A test to make sure a single endLayer with no beginLayer is a no-op.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched-expected.html
new file mode 100644
index 0000000000000..e6dd85b7e261c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched-expected.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.endlayer.unmatched</title>
+<h1>2d.layer.endlayer.unmatched</h1>
+<p class="desc">A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched.html
new file mode 100644
index 0000000000000..5f5398323264e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.endlayer.unmatched.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.endlayer.unmatched-expected.html">
+<title>Canvas test: 2d.layer.endlayer.unmatched</title>
+<h1>2d.layer.endlayer.unmatched</h1>
+<p class="desc">A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  // This endlayer call should no-op.
+  ctx.endLayer();
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
index 9a49e366a953c..857db7ba99191 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
@@ -17,7 +17,7 @@ <h1>2d.layer.global-states.alpha.filter.shadow</h1>
   ctx.fill(circle);
 
   ctx.globalAlpha = 0.5;
-  ctx.filter = 'sepia(0.5)';
+  ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
   ctx.shadowOffsetX = -10;
   ctx.shadowOffsetY = 10;
   ctx.shadowColor = 'orange';
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow.html
index cccdf42edce0a..3b4727bfc34f1 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.alpha.filter.shadow.html
@@ -19,7 +19,7 @@ <h1>2d.layer.global-states.alpha.filter.shadow</h1>
   ctx.fill(circle);
 
   ctx.globalAlpha = 0.5;
-  ctx.filter = 'sepia(0.5)';
+  ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
   ctx.shadowOffsetX = -10;
   ctx.shadowOffsetY = 10;
   ctx.shadowColor = 'orange';
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states-expected.html
new file mode 100644
index 0000000000000..139ff8ac944e5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states-expected.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.global-states.no_global_states</title>
+<h1>2d.layer.global-states.no_global_states</h1>
+<p class="desc">Checks that layers correctly use global render states.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 45, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  // No global states.
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+
+  ctx2.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx2.fillRect(50, 50, 75, 50);
+  ctx2.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx2.fillRect(70, 70, 75, 50);
+
+  ctx.drawImage(canvas2, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states.html
new file mode 100644
index 0000000000000..93d2bdeb9276f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.global-states.no_global_states.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.global-states.no_global_states-expected.html">
+<title>Canvas test: 2d.layer.global-states.no_global_states</title>
+<h1>2d.layer.global-states.no_global_states</h1>
+<p class="desc">Checks that layers correctly use global render states.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 45, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  // No global states.
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested-expected.html
new file mode 100644
index 0000000000000..65525d4d6a23d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested-expected.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.nested</title>
+<h1>2d.layer.nested</h1>
+<p class="desc">Tests nested canvas layers.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 40, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  ctx.globalCompositeOperation = 'source-in';
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+
+  ctx2.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx2.fillRect(60, 60, 75, 50);
+
+  ctx2.globalAlpha = 0.5;
+
+  canvas3 = document.createElement("canvas");
+  ctx3 = canvas3.getContext("2d");
+
+  ctx3.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx3.fillRect(50, 50, 75, 50);
+  ctx3.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx3.fillRect(70, 70, 75, 50);
+
+  ctx2.drawImage(canvas3, 0, 0);
+  ctx.drawImage(canvas2, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested.html
new file mode 100644
index 0000000000000..a508d8e5c8581
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.nested.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.nested-expected.html">
+<title>Canvas test: 2d.layer.nested</title>
+<h1>2d.layer.nested</h1>
+<p class="desc">Tests nested canvas layers.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 40, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  ctx.globalCompositeOperation = 'source-in';
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style-expected.html
new file mode 100644
index 0000000000000..1d0ac3558d1d4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style-expected.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.restore-style</title>
+<h1>2d.layer.restore-style</h1>
+<p class="desc">Test that ensure layers restores style values upon endLayer.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+  ctx2.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx2.fillRect(60, 60, 75, 50);
+  ctx.drawImage(canvas2, 0, 0);
+
+  ctx.fillRect(70, 70, 75, 50);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style.html
new file mode 100644
index 0000000000000..2537f409d6d99
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.restore-style.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.restore-style-expected.html">
+<meta name=fuzzy content="maxDifference=0-1; totalPixels=0-950">
+<title>Canvas test: 2d.layer.restore-style</title>
+<h1>2d.layer.restore-style</h1>
+<p class="desc">Test that ensure layers restores style values upon endLayer.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0,0,255,1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.endLayer();
+
+  ctx.fillRect(70, 70, 75, 50);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex-expected.html
new file mode 100644
index 0000000000000..1944ea6d2ac8f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex-expected.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.several-complex</title>
+<h1>2d.layer.several-complex</h1>
+<p class="desc">Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers.</p>
+<canvas id="canvas" width="500" height="500">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 95, 70);
+
+  ctx.globalAlpha = 0.5;
+  ctx.filter = 'sepia(0.5)';
+  ctx.shadowOffsetX = -10;
+  ctx.shadowOffsetY = 10;
+  ctx.shadowColor = 'orange';
+
+  var canvas2 = [5];
+  var ctx2 = [5];
+
+  for (let i = 0; i < 5; i++) {
+    canvas2[i] = document.createElement("canvas");
+    ctx2[i] = canvas2[i].getContext("2d");
+    ctx2[i].fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx2[i].fillRect(60, 40, 75, 50);
+    ctx2[i].fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx2[i].fillRect(80, 60, 75, 50);
+
+    ctx.drawImage(canvas2[i], i, i);
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex.html b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex.html
new file mode 100644
index 0000000000000..f99357bd7fd1b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/element/layers/2d.layer.several-complex.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.several-complex-expected.html">
+<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-6318">
+<title>Canvas test: 2d.layer.several-complex</title>
+<h1>2d.layer.several-complex</h1>
+<p class="desc">Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers.</p>
+<canvas id="canvas" width="500" height="500">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 95, 70);
+
+  ctx.globalAlpha = 0.5;
+  ctx.filter = 'sepia(0.5)';
+  ctx.shadowOffsetX = -10;
+  ctx.shadowOffsetY = 10;
+  ctx.shadowColor = 'orange';
+
+
+  for (let i = 0; i < 5; i++) {
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(60 + i, 40 + i, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(80 + i, 60 + i, 75, 50);
+
+    ctx.endLayer();
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop-expected.html
deleted file mode 100644
index 7f4937ecda40e..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop-expected.html
+++ /dev/null
@@ -1,24 +0,0 @@
-<p class="desc"> A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(60,60,75,50);
-
-ctx.globalAlpha = 0.5;
-
-ctx.beginLayer();
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(50,50,75,50);
-ctx.fillStyle = 'rgba(0,255,0,1)';
-ctx.fillRect(70,70,75,50);
-
-ctx.endLayer();
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop.html
deleted file mode 100644
index aae72cfeaefc8..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-endlayer-noop.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<link rel="match" href="layers-endlayer-noop-expected.html">
-<p class="desc"> A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(60,60,75,50);
-
-ctx.globalAlpha = 0.5;
-
-// This endlayer call should no-op.
-ctx.endLayer();
-ctx.beginLayer();
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(50,50,75,50);
-ctx.fillStyle = 'rgba(0,255,0,1)';
-ctx.fillRect(70,70,75,50);
-
-ctx.endLayer();
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer-expected.html
deleted file mode 100644
index cec5a54512c57..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer-expected.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<p class="desc"> A test to make sure a single endLayer with no beginLayer is a no-op. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(60,60,75,50);
-ctx.globalAlpha = 0.5;
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(50,50,75,50);
-ctx.fillStyle = 'rgba(0,255,0,1)';
-ctx.fillRect(70,70,75,50);
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer.html
deleted file mode 100644
index f0584d385cc69..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-loneendlayer.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<link rel="match" href="layers-loneendlayer-expected.html">
-<p class="desc"> A test to make sure a single endLayer with no beginLayer is a no-op. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(60,60,75,50);
-ctx.globalAlpha = 0.5;
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(50,50,75,50);
-ctx.fillStyle = 'rgba(0,255,0,1)';
-ctx.fillRect(70,70,75,50);
-
-ctx.endLayer();
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested-expected.html
deleted file mode 100644
index 4647996adfc69..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested-expected.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-
-var circle = new Path2D();
-circle.arc(90, 90, 40, 0, 2 * Math.PI);
-ctx.fill(circle);
-
-ctx.globalCompositeOperation = 'source-in';
-
-canvas2 = document.createElement("canvas");
-ctx2 = canvas2.getContext("2d");
-
-ctx2.fillStyle = 'rgba(0,0,255,1)';
-ctx2.fillRect(60,60,75,50);
-
-ctx2.globalAlpha = 0.5;
-
-canvas3 = document.createElement("canvas");
-ctx3 = canvas3.getContext("2d");
-
-ctx3.fillStyle = 'rgba(225,0,0,1)';
-ctx3.fillRect(50,50,75,50);
-ctx3.fillStyle = 'rgba(0,255,0,1)';
-ctx3.fillRect(70,70,75,50);
-
-ctx2.drawImage(canvas3,0,0);
-ctx.drawImage(canvas2,0,0);
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested.html
deleted file mode 100644
index fb52976ac8a44..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-nested.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<link rel="match" href="layers-nested-expected.html">
-<meta name=fuzzy content="maxDifference=0-2; totalPixels=0-14000">
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-
-var circle = new Path2D();
-circle.arc(90, 90, 40, 0, 2 * Math.PI);
-ctx.fill(circle);
-
-ctx.globalCompositeOperation = 'source-in';
-
-ctx.beginLayer();
-
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(60,60,75,50);
-
-ctx.globalAlpha = 0.5;
-
-ctx.beginLayer();
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(50,50,75,50);
-ctx.fillStyle = 'rgba(0,255,0,1)';
-ctx.fillRect(70,70,75,50);
-
-ctx.endLayer();
-ctx.endLayer();
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle-expected.html
deleted file mode 100644
index f67a4571171ad..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle-expected.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<p class="desc"> Test that ensure layers restores style values upon endLayer. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(50,50,75,50);
-ctx.globalAlpha = 0.5;
-
-canvas2 = document.createElement("canvas");
-ctx2 = canvas2.getContext("2d");
-ctx2.fillStyle = 'rgba(225,0,0,1)';
-ctx2.fillRect(60,60,75,50);
-
-ctx.drawImage(canvas2,0,0);
-
-ctx.fillRect(70,70,75,50);
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle.html
deleted file mode 100644
index 659b6c0ba05ce..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-restorestyle.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<link rel="match" href="layers-restorestyle-expected.html">
-<meta name=fuzzy content="maxDifference=0-1; totalPixels=0-14000">
-<p class="desc"> Test that ensure layers restores style values upon endLayer. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 200;
-canvas.height = 200;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(50,50,75,50);
-ctx.globalAlpha = 0.5;
-
-ctx.beginLayer();
-
-ctx.fillStyle = 'rgba(225,0,0,1)';
-ctx.fillRect(60,60,75,50);
-
-ctx.endLayer();
-
-ctx.fillRect(70,70,75,50);
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex-expected.html
deleted file mode 100644
index eca81cd8d72ce..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex-expected.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<p class="desc"> Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers. </p>
-<script>
-var canvas;
-var ctx;
-canvas = document.createElement("canvas");
-canvas.width = 500;
-canvas.height = 500;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(50,50,95,70);
-
-ctx.globalAlpha = 0.5;
-ctx.filter = 'sepia(0.5)';
-ctx.shadowOffsetX = -10;
-ctx.shadowOffsetY = 10;
-ctx.shadowColor = 'orange';
-
-var canvas2 = [5];
-var ctx2 = [5];
-
-for(let i=0; i<5; i++){
-  canvas2[i] = document.createElement("canvas");
-  ctx2[i] = canvas2[i].getContext("2d");
-  ctx2[i].fillStyle = 'rgba(225,0,0,1)';
-  ctx2[i].fillRect(60,40,75,50);
-  ctx2[i].fillStyle = 'rgba(0,255,0,1)';
-  ctx2[i].fillRect(80,60,75,50);
-
-  ctx.drawImage(canvas2[i],i,i);
-}
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex.html b/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex.html
deleted file mode 100644
index 66840bbab951a..0000000000000
--- a/tests/wpt/web-platform-tests/html/canvas/element/manual/layers/layers-several-complex.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<link rel="match" href="layers-several-complex-expected.html">
-<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-19000">
-<p class="desc"> Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers. </p>
-<script>
-var canvas, ctx;
-canvas = document.createElement("canvas");
-canvas.width = 500;
-canvas.height = 500;
-document.body.appendChild(canvas);
-
-ctx = canvas.getContext("2d");
-ctx.fillStyle = 'rgba(0,0,255,1)';
-ctx.fillRect(50,50,95,70);
-
-ctx.globalAlpha = 0.5;
-ctx.filter = 'sepia(0.5)';
-ctx.shadowOffsetX = -10;
-ctx.shadowOffsetY = 10;
-ctx.shadowColor = 'orange';
-
-
-for(let i=0; i<5; i++){
-  ctx.beginLayer();
-
-  ctx.fillStyle = 'rgba(225,0,0,1)';
-  ctx.fillRect(60+i,40+i,75,50);
-  ctx.fillStyle = 'rgba(0,255,0,1)';
-  ctx.fillRect(80+i,60+i,75,50);
-
-  ctx.endLayer();
-}
-
-</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html
new file mode 100644
index 0000000000000..607526e437628
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone-expected.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.endlayer.alone</title>
+<h1>2d.layer.endlayer.alone</h1>
+<p class="desc">A test to make sure a single endLayer with no beginLayer is a no-op.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html
new file mode 100644
index 0000000000000..f088c89aa7cb1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.endlayer.alone-expected.html">
+<title>Canvas test: 2d.layer.endlayer.alone</title>
+<h1>2d.layer.endlayer.alone</h1>
+<p class="desc">A test to make sure a single endLayer with no beginLayer is a no-op.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(200, 200);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html
new file mode 100644
index 0000000000000..96c8011550665
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.alone.w.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.endlayer.alone-expected.html">
+<title>Canvas test: 2d.layer.endlayer.alone</title>
+<h1>2d.layer.endlayer.alone</h1>
+<p class="desc">A test to make sure a single endLayer with no beginLayer is a no-op.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(200, 200);
+    const ctx = oc.getContext('2d');
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+
+    ctx.endLayer();
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html
new file mode 100644
index 0000000000000..e6dd85b7e261c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched-expected.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.endlayer.unmatched</title>
+<h1>2d.layer.endlayer.unmatched</h1>
+<p class="desc">A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+  ctx.endLayer();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html
new file mode 100644
index 0000000000000..a87c7364cfa10
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.endlayer.unmatched-expected.html">
+<title>Canvas test: 2d.layer.endlayer.unmatched</title>
+<h1>2d.layer.endlayer.unmatched</h1>
+<p class="desc">A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(200, 200);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  // This endlayer call should no-op.
+  ctx.endLayer();
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+  ctx.endLayer();
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html
new file mode 100644
index 0000000000000..9507809a52842
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.endlayer.unmatched.w.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.endlayer.unmatched-expected.html">
+<title>Canvas test: 2d.layer.endlayer.unmatched</title>
+<h1>2d.layer.endlayer.unmatched</h1>
+<p class="desc">A test to make sure an unmatched endLayer is a no-op and has no effect on the code following it.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(200, 200);
+    const ctx = oc.getContext('2d');
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+
+    ctx.globalAlpha = 0.5;
+
+    // This endlayer call should no-op.
+    ctx.endLayer();
+
+    ctx.beginLayer();
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+    ctx.endLayer();
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
index 9a49e366a953c..857db7ba99191 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow-expected.html
@@ -17,7 +17,7 @@ <h1>2d.layer.global-states.alpha.filter.shadow</h1>
   ctx.fill(circle);
 
   ctx.globalAlpha = 0.5;
-  ctx.filter = 'sepia(0.5)';
+  ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
   ctx.shadowOffsetX = -10;
   ctx.shadowOffsetY = 10;
   ctx.shadowColor = 'orange';
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.html
index 3e5e5bd9ba13a..07d5d793791dc 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.html
@@ -19,7 +19,7 @@ <h1>2d.layer.global-states.alpha.filter.shadow</h1>
   ctx.fill(circle);
 
   ctx.globalAlpha = 0.5;
-  ctx.filter = 'sepia(0.5)';
+  ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
   ctx.shadowOffsetX = -10;
   ctx.shadowOffsetY = 10;
   ctx.shadowColor = 'orange';
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.w.html
index 9fac030db321a..40039c247d650 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.w.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.alpha.filter.shadow.w.html
@@ -21,7 +21,7 @@ <h1>2d.layer.global-states.alpha.filter.shadow</h1>
     ctx.fill(circle);
 
     ctx.globalAlpha = 0.5;
-    ctx.filter = 'sepia(0.5)';
+    ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
     ctx.shadowOffsetX = -10;
     ctx.shadowOffsetY = 10;
     ctx.shadowColor = 'orange';
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html
new file mode 100644
index 0000000000000..139ff8ac944e5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states-expected.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.global-states.no_global_states</title>
+<h1>2d.layer.global-states.no_global_states</h1>
+<p class="desc">Checks that layers correctly use global render states.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 45, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  // No global states.
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+
+  ctx2.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx2.fillRect(50, 50, 75, 50);
+  ctx2.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx2.fillRect(70, 70, 75, 50);
+
+  ctx.drawImage(canvas2, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.html
new file mode 100644
index 0000000000000..6769d47e7716f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.global-states.no_global_states-expected.html">
+<title>Canvas test: 2d.layer.global-states.no_global_states</title>
+<h1>2d.layer.global-states.no_global_states</h1>
+<p class="desc">Checks that layers correctly use global render states.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(200, 200);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 45, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  // No global states.
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html
new file mode 100644
index 0000000000000..7628d387e994f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.global-states.no_global_states.w.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.global-states.no_global_states-expected.html">
+<title>Canvas test: 2d.layer.global-states.no_global_states</title>
+<h1>2d.layer.global-states.no_global_states</h1>
+<p class="desc">Checks that layers correctly use global render states.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(200, 200);
+    const ctx = oc.getContext('2d');
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+
+    var circle = new Path2D();
+    circle.arc(90, 90, 45, 0, 2 * Math.PI);
+    ctx.fill(circle);
+
+    // No global states.
+
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+
+    ctx.endLayer();
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested-expected.html
new file mode 100644
index 0000000000000..65525d4d6a23d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested-expected.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.nested</title>
+<h1>2d.layer.nested</h1>
+<p class="desc">Tests nested canvas layers.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 40, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  ctx.globalCompositeOperation = 'source-in';
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+
+  ctx2.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx2.fillRect(60, 60, 75, 50);
+
+  ctx2.globalAlpha = 0.5;
+
+  canvas3 = document.createElement("canvas");
+  ctx3 = canvas3.getContext("2d");
+
+  ctx3.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx3.fillRect(50, 50, 75, 50);
+  ctx3.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx3.fillRect(70, 70, 75, 50);
+
+  ctx2.drawImage(canvas3, 0, 0);
+  ctx.drawImage(canvas2, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.html
new file mode 100644
index 0000000000000..0c168493c2143
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.nested-expected.html">
+<title>Canvas test: 2d.layer.nested</title>
+<h1>2d.layer.nested</h1>
+<p class="desc">Tests nested canvas layers.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(200, 200);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  var circle = new Path2D();
+  circle.arc(90, 90, 40, 0, 2 * Math.PI);
+  ctx.fill(circle);
+
+  ctx.globalCompositeOperation = 'source-in';
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+  ctx.fillRect(70, 70, 75, 50);
+
+  ctx.endLayer();
+  ctx.endLayer();
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.w.html
new file mode 100644
index 0000000000000..3b81691e06ba2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.nested.w.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.nested-expected.html">
+<title>Canvas test: 2d.layer.nested</title>
+<h1>2d.layer.nested</h1>
+<p class="desc">Tests nested canvas layers.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(200, 200);
+    const ctx = oc.getContext('2d');
+
+    var circle = new Path2D();
+    circle.arc(90, 90, 40, 0, 2 * Math.PI);
+    ctx.fill(circle);
+
+    ctx.globalCompositeOperation = 'source-in';
+
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+
+    ctx.globalAlpha = 0.5;
+
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+
+    ctx.endLayer();
+    ctx.endLayer();
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html
new file mode 100644
index 0000000000000..1d0ac3558d1d4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style-expected.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.restore-style</title>
+<h1>2d.layer.restore-style</h1>
+<p class="desc">Test that ensure layers restores style values upon endLayer.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  canvas2 = document.createElement("canvas");
+  ctx2 = canvas2.getContext("2d");
+  ctx2.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx2.fillRect(60, 60, 75, 50);
+  ctx.drawImage(canvas2, 0, 0);
+
+  ctx.fillRect(70, 70, 75, 50);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.html
new file mode 100644
index 0000000000000..66f99835df4db
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.restore-style-expected.html">
+<meta name=fuzzy content="maxDifference=0-1; totalPixels=0-950">
+<title>Canvas test: 2d.layer.restore-style</title>
+<h1>2d.layer.restore-style</h1>
+<p class="desc">Test that ensure layers restores style values upon endLayer.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(200, 200);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0,0,255,1)';
+  ctx.fillRect(50, 50, 75, 50);
+  ctx.globalAlpha = 0.5;
+
+  ctx.beginLayer();
+  ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+  ctx.fillRect(60, 60, 75, 50);
+  ctx.endLayer();
+
+  ctx.fillRect(70, 70, 75, 50);
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.w.html
new file mode 100644
index 0000000000000..a717a1d31222b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.restore-style.w.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.restore-style-expected.html">
+<meta name=fuzzy content="maxDifference=0-1; totalPixels=0-950">
+<title>Canvas test: 2d.layer.restore-style</title>
+<h1>2d.layer.restore-style</h1>
+<p class="desc">Test that ensure layers restores style values upon endLayer.</p>
+<canvas id="canvas" width="200" height="200">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(200, 200);
+    const ctx = oc.getContext('2d');
+
+    ctx.fillStyle = 'rgba(0,0,255,1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    ctx.beginLayer();
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+    ctx.endLayer();
+
+    ctx.fillRect(70, 70, 75, 50);
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html
new file mode 100644
index 0000000000000..1944ea6d2ac8f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex-expected.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<title>Canvas test: 2d.layer.several-complex</title>
+<h1>2d.layer.several-complex</h1>
+<p class="desc">Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers.</p>
+<canvas id="canvas" width="500" height="500">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const canvas = document.getElementById("canvas");
+  const ctx = canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 95, 70);
+
+  ctx.globalAlpha = 0.5;
+  ctx.filter = 'sepia(0.5)';
+  ctx.shadowOffsetX = -10;
+  ctx.shadowOffsetY = 10;
+  ctx.shadowColor = 'orange';
+
+  var canvas2 = [5];
+  var ctx2 = [5];
+
+  for (let i = 0; i < 5; i++) {
+    canvas2[i] = document.createElement("canvas");
+    ctx2[i] = canvas2[i].getContext("2d");
+    ctx2[i].fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx2[i].fillRect(60, 40, 75, 50);
+    ctx2[i].fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx2[i].fillRect(80, 60, 75, 50);
+
+    ctx.drawImage(canvas2[i], i, i);
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.html
new file mode 100644
index 0000000000000..b4b2a8da602e6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.several-complex-expected.html">
+<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-6318">
+<title>Canvas test: 2d.layer.several-complex</title>
+<h1>2d.layer.several-complex</h1>
+<p class="desc">Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers.</p>
+<canvas id="canvas" width="500" height="500">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script>
+  const offscreen_canvas = new OffscreenCanvas(500, 500);
+  const ctx = offscreen_canvas.getContext('2d');
+
+  ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+  ctx.fillRect(50, 50, 95, 70);
+
+  ctx.globalAlpha = 0.5;
+  ctx.filter = 'sepia(0.5)';
+  ctx.shadowOffsetX = -10;
+  ctx.shadowOffsetY = 10;
+  ctx.shadowColor = 'orange';
+
+
+  for (let i = 0; i < 5; i++) {
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(60 + i, 40 + i, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(80 + i, 60 + i, 75, 50);
+
+    ctx.endLayer();
+  }
+
+  const canvas = document.getElementById("canvas");
+  canvas.getContext('2d').drawImage(offscreen_canvas, 0, 0);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.w.html
new file mode 100644
index 0000000000000..5260cc2724d38
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/layers/2d.layer.several-complex.w.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<html class="reftest-wait">
+<link rel="match" href="2d.layer.several-complex-expected.html">
+<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-6318">
+<title>Canvas test: 2d.layer.several-complex</title>
+<h1>2d.layer.several-complex</h1>
+<p class="desc">Test to ensure beginlayer works for filter, alpha and shadow, even with consecutive layers.</p>
+<canvas id="canvas" width="500" height="500">
+  <p class="fallback">FAIL (fallback content)</p>
+</canvas>
+<script id='myWorker' type='text/worker'>
+  self.onmessage = function(e) {
+    const oc = new OffscreenCanvas(500, 500);
+    const ctx = oc.getContext('2d');
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(50, 50, 95, 70);
+
+    ctx.globalAlpha = 0.5;
+    ctx.filter = 'sepia(0.5)';
+    ctx.shadowOffsetX = -10;
+    ctx.shadowOffsetY = 10;
+    ctx.shadowColor = 'orange';
+
+
+    for (let i = 0; i < 5; i++) {
+      ctx.beginLayer();
+
+      ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+      ctx.fillRect(60 + i, 40 + i, 75, 50);
+      ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+      ctx.fillRect(80 + i, 60 + i, 75, 50);
+
+      ctx.endLayer();
+    }
+
+    const bitmap = oc.transferToImageBitmap();
+    self.postMessage(bitmap, bitmap);
+  };
+</script>
+<script>
+  const blob = new Blob([document.getElementById('myWorker').textContent]);
+  const worker = new Worker(URL.createObjectURL(blob));
+  worker.addEventListener('message', msg => {
+    const outputCtx = document.getElementById("canvas").getContext('2d');
+    outputCtx.drawImage(msg.data, 0, 0);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+  worker.postMessage(null);
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
index 51dedfd781326..6889e164bfb32 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/layers.yaml
@@ -37,6 +37,8 @@
 
     ctx.drawImage(canvas2, 0, 0);
   variants:
+    no_global_states:
+      render_states: // No global states.
     alpha:
       render_states: ctx.globalAlpha = 0.6;
     globalcompositeoperation:
@@ -62,7 +64,7 @@
       fuzzy: maxDifference=0-2; totalPixels=0-5824
       render_states: |-
         ctx.globalAlpha = 0.5;
-        ctx.filter = 'sepia(0.5)';
+        ctx.filter = 'sepia(0.5) drop-shadow(5px 5px 0px #81e)';
         ctx.shadowOffsetX = -10;
         ctx.shadowOffsetY = 10;
         ctx.shadowColor = 'orange';
@@ -82,3 +84,196 @@
       render_states: |-
         ctx.globalCompositeOperation = 'source-in';
         ctx.filter = 'drop-shadow(-9px 9px 0px #e81)';
+
+
+- name: 2d.layer.nested
+  desc: Tests nested canvas layers.
+  size: 200, 200
+  code: |
+    var circle = new Path2D();
+    circle.arc(90, 90, 40, 0, 2 * Math.PI);
+    ctx.fill(circle);
+
+    ctx.globalCompositeOperation = 'source-in';
+
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+
+    ctx.globalAlpha = 0.5;
+
+    ctx.beginLayer();
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+
+    ctx.endLayer();
+    ctx.endLayer();
+  reference: |
+    var circle = new Path2D();
+    circle.arc(90, 90, 40, 0, 2 * Math.PI);
+    ctx.fill(circle);
+
+    ctx.globalCompositeOperation = 'source-in';
+
+    canvas2 = document.createElement("canvas");
+    ctx2 = canvas2.getContext("2d");
+
+    ctx2.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx2.fillRect(60, 60, 75, 50);
+
+    ctx2.globalAlpha = 0.5;
+
+    canvas3 = document.createElement("canvas");
+    ctx3 = canvas3.getContext("2d");
+
+    ctx3.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx3.fillRect(50, 50, 75, 50);
+    ctx3.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx3.fillRect(70, 70, 75, 50);
+
+    ctx2.drawImage(canvas3, 0, 0);
+    ctx.drawImage(canvas2, 0, 0);
+
+
+- name: 2d.layer.restore-style
+  desc: Test that ensure layers restores style values upon endLayer.
+  size: 200, 200
+  fuzzy: maxDifference=0-1; totalPixels=0-950
+  code: |
+    ctx.fillStyle = 'rgba(0,0,255,1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    ctx.beginLayer();
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+    ctx.endLayer();
+
+    ctx.fillRect(70, 70, 75, 50);
+  reference: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    canvas2 = document.createElement("canvas");
+    ctx2 = canvas2.getContext("2d");
+    ctx2.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx2.fillRect(60, 60, 75, 50);
+    ctx.drawImage(canvas2, 0, 0);
+
+    ctx.fillRect(70, 70, 75, 50);
+
+
+- name: 2d.layer.several-complex
+  desc: >-
+    Test to ensure beginlayer works for filter, alpha and shadow, even with
+    consecutive layers.
+  size: 500, 500
+  fuzzy: maxDifference=0-3; totalPixels=0-6318
+  code: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(50, 50, 95, 70);
+
+    ctx.globalAlpha = 0.5;
+    ctx.filter = 'sepia(0.5)';
+    ctx.shadowOffsetX = -10;
+    ctx.shadowOffsetY = 10;
+    ctx.shadowColor = 'orange';
+
+
+    for (let i = 0; i < 5; i++) {
+      ctx.beginLayer();
+
+      ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+      ctx.fillRect(60 + i, 40 + i, 75, 50);
+      ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+      ctx.fillRect(80 + i, 60 + i, 75, 50);
+
+      ctx.endLayer();
+    }
+  reference: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(50, 50, 95, 70);
+
+    ctx.globalAlpha = 0.5;
+    ctx.filter = 'sepia(0.5)';
+    ctx.shadowOffsetX = -10;
+    ctx.shadowOffsetY = 10;
+    ctx.shadowColor = 'orange';
+
+    var canvas2 = [5];
+    var ctx2 = [5];
+
+    for (let i = 0; i < 5; i++) {
+      canvas2[i] = document.createElement("canvas");
+      ctx2[i] = canvas2[i].getContext("2d");
+      ctx2[i].fillStyle = 'rgba(225, 0, 0, 1)';
+      ctx2[i].fillRect(60, 40, 75, 50);
+      ctx2[i].fillStyle = 'rgba(0, 255, 0, 1)';
+      ctx2[i].fillRect(80, 60, 75, 50);
+
+      ctx.drawImage(canvas2[i], i, i);
+    }
+
+
+- name: 2d.layer.endlayer.unmatched
+  desc: >-
+    A test to make sure an unmatched endLayer is a no-op and has no effect on
+    the code following it.
+  size: 200, 200
+  code: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+
+    ctx.globalAlpha = 0.5;
+
+    // This endlayer call should no-op.
+    ctx.endLayer();
+
+    ctx.beginLayer();
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+    ctx.endLayer();
+  reference: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+
+    ctx.globalAlpha = 0.5;
+
+    ctx.beginLayer();
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+    ctx.endLayer();
+
+
+- name: 2d.layer.endlayer.alone
+  desc: A test to make sure a single endLayer with no beginLayer is a no-op.
+  size: 200, 200
+  code: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
+
+    ctx.endLayer();
+  reference: |
+    ctx.fillStyle = 'rgba(0, 0, 255, 1)';
+    ctx.fillRect(60, 60, 75, 50);
+    ctx.globalAlpha = 0.5;
+
+    ctx.fillStyle = 'rgba(225, 0, 0, 1)';
+    ctx.fillRect(50, 50, 75, 50);
+    ctx.fillStyle = 'rgba(0, 255, 0, 1)';
+    ctx.fillRect(70, 70, 75, 50);
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html b/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html
new file mode 100644
index 0000000000000..7a881bcc3ddb4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/link-stylesheet-with-non-match-media-does-not-block-render.tentative.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<title>
+  Delayed Stylesheet imported using link tag should not block rendering
+  or JS execution when media doesn't match.
+</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/utils.js"></script>
+<link rel="stylesheet" href="support/link-style.css?pipe=trickle(d1)"
+  media="print" onload="this.media='all'">
+<h1>
+  This text is black in color till stylesheet is fetched.
+</h1>
+<script>
+test(() => {
+  assert_false(styleExists("h1 { color: purple; }"),
+               'Stylesheet should still be pending due to delay');
+  const h1 = document.querySelector('h1');
+  assert_equals(getComputedStyle(h1).color, 'rgb(0, 0, 0)');
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/support/link-style.css b/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/support/link-style.css
new file mode 100644
index 0000000000000..1024df8792067
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/support/link-style.css
@@ -0,0 +1,3 @@
+h1 {
+    color: purple;
+}
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/textfieldselection/select-event.html b/tests/wpt/web-platform-tests/html/semantics/forms/textfieldselection/select-event.html
index c3a65f7302a9d..5b29ac1d88628 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/textfieldselection/select-event.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/textfieldselection/select-event.html
@@ -60,7 +60,7 @@
 ];
 
 function waitForRender() {
-  return new Promise(resolve => requestAnimationFrame(() => requestAnimationFrame(resolve)));
+  return new Promise(resolve => setTimeout(resolve, 0));
 }
 
 function initialize(el) {
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-attribute-basic.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-attribute-basic.html
index 0abba9c4e87f7..e9167aaecbfa9 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-attribute-basic.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-attribute-basic.html
@@ -237,15 +237,6 @@
     assert_false(popover.matches(':open'),'From "auto" to "invalid" (which is interpreted as "manual") should close the popover');
   },'Changing attribute values should close open popovers');
 
-  function modalPseudoSupported() {
-    try {
-      document.createElement('dialog').matches(':modal');
-      return true; // No exception means :modal is supported.
-    } catch(e) {
-      return false;
-    }
-  }
-
   const validTypes = ["auto","manual"];
   validTypes.forEach(type => {
     test((t) => {
@@ -259,16 +250,14 @@
       assert_false(popover.matches(':open'));
     },`Removing a visible popover=${type} element from the document should close the popover`);
 
-    if (modalPseudoSupported()) {
-      test((t) => {
-        const popover = createPopover(t);
-        popover.setAttribute('popover',type);
-        popover.showPopover();
-        assert_true(popover.matches(':open'));
-        assert_false(popover.matches(':modal'));
-        popover.hidePopover();
-      },`A showing popover=${type} does not match :modal`);
-    }
+    test((t) => {
+      const popover = createPopover(t);
+      popover.setAttribute('popover',type);
+      popover.showPopover();
+      assert_true(popover.matches(':open'));
+      assert_false(popover.matches(':modal'));
+      popover.hidePopover();
+    },`A showing popover=${type} does not match :modal`);
   });
 
   test((t) => {
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-beforetoggle-opening-event.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-beforetoggle-opening-event.html
index e3597d1c69936..41bb9aa82c51a 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-beforetoggle-opening-event.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-beforetoggle-opening-event.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <meta charset="utf-8" />
-<title>Popover show event</title>
+<title>Popover beforetoggle event</title>
 <link rel="author" href="mailto:masonf@chromium.org">
 <link rel=help href="https://open-ui.org/components/popover.research.explainer">
 <link rel=help href="https://html.spec.whatwg.org/multipage/popover.html">
@@ -16,6 +16,7 @@
   const popover = document.querySelector('[popover]');
   const testText = 'Show Event Occurred';
   popover.addEventListener('beforetoggle',(e) => {
+    assert_false(e.bubbles, 'beforetoggle event does not bubble');
     if (e.newState !== "open")
       return;
     popover.textContent = testText;
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-events.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-events.html
index 1ccd9967c5c9d..95cd5ad2add38 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-events.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-events.html
@@ -28,21 +28,27 @@
       let hideCount = 0;
       let afterHideCount = 0;
       function listener(e) {
+        assert_false(e.bubbles,'toggle events should not bubble');
         if (e.type === "beforetoggle") {
           if (e.newState === "open") {
             ++showCount;
             assert_equals(e.oldState,"closed",'The "beforetoggle" event should be fired before the popover is open');
             assert_true(e.target.matches(':closed'),'The popover should be in the :closed state when the opening event fires.');
             assert_false(e.target.matches(':open'),'The popover should *not* be in the :open state when the opening event fires.');
+            assert_true(e.cancelable,'beforetoggle should be cancelable only for the "show" transition');
           } else {
             ++hideCount;
             assert_equals(e.newState,"closed",'Popover toggleevent states should be "open" and "closed"');
             assert_equals(e.oldState,"open",'The "beforetoggle" event should be fired before the popover is closed')
             assert_true(e.target.matches(':open'),'The popover should be in the :open state when the hiding event fires.');
             assert_false(e.target.matches(':closed'),'The popover should *not* be in the :closed state when the hiding event fires.');
+            assert_false(e.cancelable,'beforetoggle should be cancelable only for the "show" transition');
+            e.preventDefault(); // beforetoggle should be cancelable only for the "show" transition
           }
         } else {
           assert_equals(e.type,"toggle",'Popover events should be "beforetoggle" and "toggle"')
+          assert_false(e.cancelable,'toggle should never be cancelable');
+          e.preventDefault(); // toggle should never be cancelable
           if (e.newState === "open") {
             ++afterShowCount;
             if (document.body.contains(e.target)) {
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/actionsWithKeyPressed.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/actionsWithKeyPressed.html.ini
new file mode 100644
index 0000000000000..78bfa5f38a1c5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/actionsWithKeyPressed.html.ini
@@ -0,0 +1,3 @@
+[actionsWithKeyPressed.html]
+  expected:
+    if product == "safari": ERROR
diff --git a/tests/wpt/web-platform-tests/lint.ignore b/tests/wpt/web-platform-tests/lint.ignore
index f6776a6617497..cddc3203b676f 100644
--- a/tests/wpt/web-platform-tests/lint.ignore
+++ b/tests/wpt/web-platform-tests/lint.ignore
@@ -185,6 +185,7 @@ SET TIMEOUT: html/semantics/embedded-content/the-iframe-element/*
 SET TIMEOUT: html/semantics/embedded-content/the-img-element/*
 SET TIMEOUT: html/semantics/embedded-content/the-object-element/object-param-url.html
 SET TIMEOUT: html/semantics/embedded-content/the-object-element/object-param-url-ref.html
+SET TIMEOUT: html/semantics/forms/textfieldselection/select-event.html
 SET TIMEOUT: html/semantics/scripting-1/the-script-element/*
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/0*
 SET TIMEOUT: html/webappapis/dynamic-markup-insertion/opening-the-input-stream/resources/history-frame.html
diff --git a/tests/wpt/web-platform-tests/media-source/mediasource-remove.html b/tests/wpt/web-platform-tests/media-source/mediasource-remove.html
index 6fea5a3e2e536..64d5a31488b45 100644
--- a/tests/wpt/web-platform-tests/media-source/mediasource-remove.html
+++ b/tests/wpt/web-platform-tests/media-source/mediasource-remove.html
@@ -208,6 +208,35 @@
 
           }, "Test remove with a start at the duration.");
 
+          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
+          {
+              sourceBuffer.appendBuffer(mediaData);
+
+              test.expectEvent(sourceBuffer, "updatestart");
+              test.expectEvent(sourceBuffer, "update");
+              test.expectEvent(sourceBuffer, "updateend");
+
+              test.waitForExpectedEvents(function()
+              {
+                  assert_less_than(mediaSource.duration, 10)
+
+                  mediaSource.duration = 10;
+
+                  sourceBuffer.remove(1, 1 + 0.9 / (1000 * 1000));
+
+                  assert_true(sourceBuffer.updating, "updating");
+                  test.expectEvent(sourceBuffer, "updatestart");
+                  test.expectEvent(sourceBuffer, "update");
+                  test.expectEvent(sourceBuffer, "updateend");
+              });
+
+              test.waitForExpectedEvents(function()
+              {
+                  test.done();
+              });
+
+          }, "Test remove with a nanosecond range.");
+
           mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
           {
               test.expectEvent(sourceBuffer, "updatestart");
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_auxclick_is_a_pointerevent.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_auxclick_is_a_pointerevent.html
index 96b232867f044..b3b7481d6ab19 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_auxclick_is_a_pointerevent.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_auxclick_is_a_pointerevent.html
@@ -8,6 +8,7 @@
 <script src="/resources/testdriver.js"></script>
 <script src="/resources/testdriver-actions.js"></script>
 <script src="/resources/testdriver-vendor.js"></script>
+<script src="pointerevent_support.js"></script>
 
 <input id="target" style="margin: 20px">
 
@@ -41,6 +42,7 @@
       pointerId = 0;
       pointerType = "";
     });
+    let pointerDownPrevented = preventDefaultPointerdownOnce(target);
     target.addEventListener("auxclick", auxclickFunc);
     let eventWatcher = new EventWatcher(test, target, ["auxclick"]);
     let actions = new test_driver.Actions();
@@ -49,7 +51,7 @@
       .pointerMove(0,0, {origin:target, sourceName:testPointer})
       .pointerDown({button:actions.ButtonType.MIDDLE, sourceName:testPointer})
       .pointerUp({button:actions.ButtonType.MIDDLE, sourceName:testPointer});
-    Promise.all([eventWatcher.wait_for("auxclick"), actions.send()]).then(()=>resolve());
+    Promise.all([pointerDownPrevented, eventWatcher.wait_for("auxclick"), actions.send()]).then(()=>resolve());
   }), "auxclick using " + pointerType + " is a PointerEvent");
 }
 
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_click_is_a_pointerevent.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_click_is_a_pointerevent.html
index 46c1ed4f49c59..9e4b023a25af7 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_click_is_a_pointerevent.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_click_is_a_pointerevent.html
@@ -42,12 +42,15 @@
 promise_test(async () => {
   const target = document.getElementById("target");
 
+  let pointerDownPrevented = preventDefaultPointerdownOnce(target);
+
   let pointerdown_promise = getEvent("pointerdown", target);
   let pointerup_promise = getEvent("pointerup", target);
   let click_promise = getEvent("click", target);
 
   await clickInTarget(pointer_type, target);
 
+  await pointerDownPrevented;
   let pointerdown_event = await pointerdown_promise;
   let pointerup_event = await pointerup_promise;
   let click_event = await click_promise;
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_contextmenu_is_a_pointerevent.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_contextmenu_is_a_pointerevent.html
index 2d64a0d100844..fe3a69942ef63 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_contextmenu_is_a_pointerevent.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_contextmenu_is_a_pointerevent.html
@@ -8,6 +8,7 @@
 <script src="/resources/testdriver.js"></script>
 <script src="/resources/testdriver-actions.js"></script>
 <script src="/resources/testdriver-vendor.js"></script>
+<script src="pointerevent_support.js"></script>
 
 <input id="target" style="margin: 20px">
 
@@ -29,6 +30,7 @@
   pointerdownPointerType = e.pointerType;
 });
 
+let pointerDownPrevented = preventDefaultPointerdownOnce(target);
 let eventWatcher = new EventWatcher(contextmenuTest, target, ["contextmenu"]);
 let actions = new test_driver.Actions();
 // TODO: We might be able to test "pen" just like "touch".
@@ -38,5 +40,5 @@
   .pointerDown({sourceName:testPointer, button:actions.ButtonType.RIGHT})
   .pause(inputSource === "touch" ? 1500 : 0, "pointer", {sourceName:testPointer})
   .pointerUp({sourceName:testPointer, button:actions.ButtonType.RIGHT});
-Promise.all([eventWatcher.wait_for("contextmenu"), actions.send()]).then(()=>contextmenuTest.done());
+Promise.all([pointerDownPrevented, eventWatcher.wait_for("contextmenu"), actions.send()]).then(()=>contextmenuTest.done());
 </script>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
index a4b7adce3e530..f3229b90b6a4a 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
@@ -523,3 +523,13 @@ function getMessageData(message_data_type, source) {
     window.addEventListener("message", waitAndRemove);
   });
 }
+
+function preventDefaultPointerdownOnce(target) {
+  return new Promise(
+    (resolve) => {
+      target.addEventListener("pointerdown", (event) => {
+                                event.preventDefault();
+                                resolve();
+                              }, {once: true});
+    });
+}
diff --git a/tests/wpt/web-platform-tests/preload/modulepreload.html b/tests/wpt/web-platform-tests/preload/modulepreload.html
index 919762618f387..58830fe064b5d 100644
--- a/tests/wpt/web-platform-tests/preload/modulepreload.html
+++ b/tests/wpt/web-platform-tests/preload/modulepreload.html
@@ -6,11 +6,11 @@
 <script>
 host_info = get_host_info();
 
-function verifyNumberOfDownloads(url, number) {
+function verifyNumberOfDownloads(url, number, allowTransferSizeOfZero = false) {
     var numDownloads = 0;
     let absoluteURL = new URL(url, location.href).href;
     performance.getEntriesByName(absoluteURL).forEach(entry => {
-        if (entry.transferSize > 0) {
+        if (entry.transferSize > 0 || allowTransferSizeOfZero) {
             numDownloads++;
         }
     });
@@ -107,7 +107,7 @@
         link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`;
         return attachAndWaitForLoad(link);
     }).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1, true);
 
         // Verify that <script> doesn't fetch the module again.
         var script = document.createElement('script');
@@ -115,7 +115,7 @@
         script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`;
         return attachAndWaitForLoad(script);
     }).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginNone`, 1, true);
     });
 }, 'cross-origin link rel=modulepreload');
 
@@ -125,7 +125,7 @@
     link.crossorigin = 'anonymous';
     link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`;
     return attachAndWaitForLoad(link).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1, true);
 
         // Verify that <script> doesn't fetch the module again.
         var script = document.createElement('script');
@@ -134,7 +134,7 @@
         script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`;
         return attachAndWaitForLoad(script);
     }).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginAnonymous`, 1, true);
     });
 }, 'cross-origin link rel=modulepreload crossorigin=anonymous');
 
@@ -144,7 +144,7 @@
     link.crossorigin = 'use-credentials';
     link.href = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`;
     return attachAndWaitForLoad(link).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1, true);
 
         // Verify that <script> doesn't fetch the module again.
         var script = document.createElement('script');
@@ -153,7 +153,7 @@
         script.src = `${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`;
         return attachAndWaitForLoad(script);
     }).then(() => {
-        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1);
+        verifyNumberOfDownloads(`${host_info.HTTP_REMOTE_ORIGIN}/preload/resources/cross-origin-module.py?crossOriginUseCredentials`, 1, true);
     });
 }, 'cross-origin link rel=modulepreload crossorigin=use-credentials');
 /**
@@ -163,18 +163,18 @@
 promise_test(function(t) {
     var link = document.createElement('link');
     link.rel = 'modulepreload';
-    link.href = 'resources/module1.js';
+    link.href = 'resources/module1.js?submodule';
     return attachAndWaitForLoad(link).then(() => {
-        verifyNumberOfDownloads('resources/module1.js', 1);
+        verifyNumberOfDownloads('resources/module1.js?submodule', 1);
         // The load event fires before (optional) submodules fetch.
         verifyNumberOfDownloads('resources/module2.js', 0);
 
         var script = document.createElement('script');
         script.type = 'module';
-        script.src = 'resources/module1.js';
+        script.src = 'resources/module1.js?submodule';
         return attachAndWaitForLoad(script);
     }).then(() => {
-        verifyNumberOfDownloads('resources/module1.js', 1);
+        verifyNumberOfDownloads('resources/module1.js?submodule', 1);
         verifyNumberOfDownloads('resources/module2.js', 1);
     });
 }, 'link rel=modulepreload with submodules');
diff --git a/tests/wpt/web-platform-tests/resources/chromium/mock-direct-sockets.js b/tests/wpt/web-platform-tests/resources/chromium/mock-direct-sockets.js
index 0752850c8a383..e2e02453f7f4d 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/mock-direct-sockets.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/mock-direct-sockets.js
@@ -38,6 +38,15 @@ self.DirectSocketsServiceTest = (() => {
         result: -11
       });
     }
+
+    openTCPServerSocket(
+      options,
+      receiver) {
+      return Promise.resolve({
+        // return result = net:Error::NOT_IMPLEMENTED (code -11)
+        result: -11
+      });
+    }
   }
 
   let testInternal = {
diff --git a/tests/wpt/web-platform-tests/resources/chromium/nfc-mock.js b/tests/wpt/web-platform-tests/resources/chromium/nfc-mock.js
index 4796735b13644..31a71b9e22037 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/nfc-mock.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/nfc-mock.js
@@ -50,7 +50,7 @@ function toByteArray(data) {
     tmpData = JSON.stringify(tmpData);
 
   if (typeof tmpData === 'string')
-    byteArray = new TextEncoder('utf-8').encode(tmpData);
+    byteArray = new TextEncoder().encode(tmpData);
 
   return byteArray;
 }
diff --git a/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess-insecure.sub.window.js b/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess-insecure.sub.window.js
index 74996800df9c2..2f9f9f4f3890b 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess-insecure.sub.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess-insecure.sub.window.js
@@ -1,7 +1,7 @@
 // META: script=helpers.js
 'use strict';
 
-const {expectAccessAllowed, testPrefix, topLevelDocument} = processQueryParams();
+const {testPrefix, topLevelDocument} = processQueryParams();
 
 // Common tests to run in all frames.
 test(() => {
@@ -31,16 +31,16 @@ if (topLevelDocument) {
   // of various iFrames
 
   // Create a test with a single-child same-origin iframe.
-  RunTestsInIFrame("resources/hasStorageAccess-iframe.html?testCase=same-origin-frame&rootdocument=false");
+  RunTestsInIFrame("resources/hasStorageAccess-iframe.html?testCase=same-origin-frame");
 
   // Create a test with a single-child cross-origin iframe.
-  RunTestsInIFrame("http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/hasStorageAccess-iframe.html?testCase=cross-origin-frame&rootdocument=false");
+  RunTestsInIFrame("http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/hasStorageAccess-iframe.html?testCase=cross-origin-frame");
 
   // Validate the nested-iframe scenario where the same-origin frame containing
   // the tests is not the first child.
-  RunTestsInNestedIFrame("resources/hasStorageAccess-iframe.html?testCase=nested-same-origin-frame&rootdocument=false");
+  RunTestsInNestedIFrame("resources/hasStorageAccess-iframe.html?testCase=nested-same-origin-frame");
 
   // Validate the nested-iframe scenario where the cross-origin frame containing
   //  the tests is not the first child.
-  RunTestsInNestedIFrame("http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/hasStorageAccess-iframe.html?testCase=nested-cross-origin-frame&rootdocument=false");
+  RunTestsInNestedIFrame("http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/hasStorageAccess-iframe.html?testCase=nested-cross-origin-frame");
 }
diff --git a/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess.sub.https.window.js
index 3faf492d13fcf..6cba6f0980a3c 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/hasStorageAccess.sub.https.window.js
@@ -1,7 +1,7 @@
 // META: script=helpers.js
 'use strict';
 
-const {expectAccessAllowed, testPrefix, topLevelDocument} = processQueryParams();
+const {testPrefix, topLevelDocument} = processQueryParams();
 
 // Common tests to run in all frames.
 test(() => {
@@ -10,8 +10,12 @@ test(() => {
 
 promise_test(async () => {
   const hasAccess = await document.hasStorageAccess();
-  assert_equals(hasAccess, expectAccessAllowed, "Access should be granted by default: " + expectAccessAllowed);
-}, "[" + testPrefix + "] document.hasStorageAccess() should be allowed by default: " + expectAccessAllowed);
+  if (topLevelDocument || testPrefix.includes('same-origin')) {
+    assert_true(hasAccess, "Access should be granted in top-level frame or same-origin iframe by default.");
+  } else {
+    assert_false(hasAccess, "Access should not be granted in secure cross-origin iframes.");
+  }
+}, "[" + testPrefix + "] document.hasStorageAccess() should not be allowed by default unless in top-level frame or same-origin iframe.");
 
 promise_test(async (t) => {
   const description = "Promise should reject when called on a generated document not part of the DOM.";
@@ -31,16 +35,16 @@ if (topLevelDocument) {
   // of various iFrames
 
   // Create a test with a single-child same-origin iframe.
-  RunTestsInIFrame("resources/hasStorageAccess-iframe.https.html?testCase=same-origin-frame&rootdocument=false");
+  RunTestsInIFrame("resources/hasStorageAccess-iframe.https.html?testCase=same-origin-frame");
 
   // Create a test with a single-child cross-origin iframe.
-  RunTestsInIFrame("https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/hasStorageAccess-iframe.https.html?testCase=cross-origin-frame&rootdocument=false");
+  RunTestsInIFrame("https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/hasStorageAccess-iframe.https.html?testCase=cross-origin-frame");
 
   // Validate the nested-iframe scenario where the same-origin frame containing
   // the tests is not the first child.
-  RunTestsInNestedIFrame("resources/hasStorageAccess-iframe.https.html?testCase=nested-same-origin-frame&rootdocument=false");
+  RunTestsInNestedIFrame("resources/hasStorageAccess-iframe.https.html?testCase=nested-same-origin-frame");
 
   // Validate the nested-iframe scenario where the cross-origin frame containing
   //  the tests is not the first child.
-  RunTestsInNestedIFrame("https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/hasStorageAccess-iframe.https.html?testCase=nested-cross-origin-frame&rootdocument=false");
+  RunTestsInNestedIFrame("https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/hasStorageAccess-iframe.https.html?testCase=nested-cross-origin-frame");
 }
diff --git a/tests/wpt/web-platform-tests/storage-access-api/helpers.js b/tests/wpt/web-platform-tests/storage-access-api/helpers.js
index b0f8866f7c68e..5728d0690d778 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/helpers.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/helpers.js
@@ -1,10 +1,10 @@
 'use strict';
 
 function processQueryParams() {
-  const queryParams = new URL(window.location).searchParams;
+  const url = new URL(window.location);
+  const queryParams = url.searchParams;
   return {
-    expectAccessAllowed: queryParams.get("allowed") != "false",
-    topLevelDocument: queryParams.get("rootdocument") != "false",
+    topLevelDocument: window === window.top,
     testPrefix: queryParams.get("testCase") || "top-level-context",
   };
 }
@@ -108,12 +108,46 @@ function ReloadPromise(frame) {
   });
 }
 
+// Writes cookies via document.cookie in the given frame.
+function SetDocumentCookieFromFrame(frame, cookie) {
+  return PostMessageAndAwaitReply(
+    { command: "write document.cookie", cookie }, frame.contentWindow);
+}
+
 // Reads cookies via document.cookie in the given frame.
 function GetJSCookiesFromFrame(frame) {
   return PostMessageAndAwaitReply(
       { command: "document.cookie" }, frame.contentWindow);
 }
 
+async function DeleteCookieInFrame(frame, name, params) {
+  await SetDocumentCookieFromFrame(frame, `${name}=0; expires=${new Date(0).toUTCString()}; ${params};`);
+  assert_false(cookieStringHasCookie(name, '0', await GetJSCookiesFromFrame(frame)), `Verify that cookie '${name}' has been deleted.`);
+}
+
+// Tests whether the frame can write cookies via document.cookie. Note that this
+// overwrites, then deletes, cookies named "cookie" and "foo".
+//
+// This function requires the caller to have included
+// /cookies/resources/cookie-helper.sub.js.
+async function CanFrameWriteCookies(frame) {
+  const cookie_suffix = "Secure;SameSite=None;Path=/";
+  await DeleteCookieInFrame(frame, "cookie", cookie_suffix);
+  await DeleteCookieInFrame(frame, "foo", cookie_suffix);
+
+  await SetDocumentCookieFromFrame(frame, `cookie=monster;${cookie_suffix}`);
+  await SetDocumentCookieFromFrame(frame, `foo=bar;${cookie_suffix}`);
+
+  const cookies = await GetJSCookiesFromFrame(frame);
+  const can_write = cookieStringHasCookie("cookie", "monster", cookies) &&
+      cookieStringHasCookie("foo", "bar", cookies);
+
+  await DeleteCookieInFrame(frame, "cookie", cookie_suffix);
+  await DeleteCookieInFrame(frame, "foo", cookie_suffix);
+
+  return can_write;
+}
+
 // Reads cookies via the `httpCookies` variable in the given frame.
 function GetHTTPCookiesFromFrame(frame) {
   return PostMessageAndAwaitReply(
@@ -155,6 +189,10 @@ function FrameInitiatedReload(frame) {
 }
 
 // Tries to set storage access policy, ignoring any errors.
+//
+// Note: to discourage the writing of tests that assume unpartitioned cookie
+// access by default, any test that calls this with `value` == "blocked" should
+// do so as the first step in the test.
 async function MaybeSetStorageAccess(origin, embedding_origin, value) {
   try {
     await test_driver.set_storage_access(origin, embedding_origin, value);
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.js
index a469d1b962819..0efbb2f06b3b7 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe-navigation.sub.https.window.js
@@ -9,36 +9,30 @@
   const wwwAlt = "https://{{hosts[alt][www]}}:{{ports[https][0]}}";
 
   promise_test(async (t) => {
+    await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
+
     const responder_html = `${wwwAlt}/storage-access-api/resources/script-with-cookie-header.py?script=embedded_responder.js`;
     const frame = await CreateFrame(responder_html);
 
+    await SetPermissionInFrame(frame, [{ name: 'storage-access' }, 'granted']);
     t.add_cleanup(async () => {
       await test_driver.delete_all_cookies();
       await SetPermissionInFrame(frame, [{ name: 'storage-access' }, 'prompt']);
-    });
-
-    await SetPermissionInFrame(frame, [{ name: 'storage-access' }, 'granted']);
-    await fetch(`${wwwAlt}/cookies/resources/set.py?cookie=monster;Secure;SameSite=None;Path=/`,
-      { mode: "no-cors", credentials: "include" }).then((resp) => resp.text());
-
-    await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
-    t.add_cleanup(async () => {
       await MaybeSetStorageAccess(wwwAlt + "/", "*", "allowed");
     });
 
     assert_false(await FrameHasStorageAccess(frame), "frame initially does not have storage access.");
-    assert_false(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame)), "frame cannot access cookies via JS.");
+    assert_false(await CanFrameWriteCookies(frame), "frame initially cannot write cookies via document.cookie.");
     assert_false(cookieStringHasCookie("cookie", "monster", await GetHTTPCookiesFromFrame(frame)), "frame's fetch was done without credentials.");
 
     assert_true(await RequestStorageAccessInFrame(frame), "requestStorageAccess resolves without requiring a gesture.");
 
     assert_true(await FrameHasStorageAccess(frame), "frame has storage access after request.");
-    assert_true(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame)), "frame has cookie access via JS after request.");
+    assert_true(await CanFrameWriteCookies(frame), "frame can write cookies via JS after request.");
 
     await FrameInitiatedReload(frame);
 
     assert_true(await FrameHasStorageAccess(frame), "frame has storage access after refresh.");
-    assert_true(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame)), "frame can access cookies via JS after refresh.");
-    assert_true(cookieStringHasCookie("cookie", "monster", await GetHTTPCookiesFromFrame(frame)), "frame's fetch was credentialed.");
+    assert_true(await CanFrameWriteCookies(frame), "frame can write cookies via JS after refresh.");
   }, "Self-initiated same-origin navigations preserve storage access");
 })();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe.sub.https.window.js
index 2367afd003da3..9183832957a76 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-iframe.sub.https.window.js
@@ -5,5 +5,5 @@
 
 (async function() {
   // Create a test with a single-child cross-origin iframe.
-  RunTestsInIFrame('https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=cross-origin-frame&rootdocument=false');
+  RunTestsInIFrame('https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=cross-origin-frame');
 })();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.js
index 8da905ae7defe..fd82f89f3c97f 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-origin-sibling-iframes.sub.https.window.js
@@ -9,6 +9,7 @@
   const wwwAlt = "https://{{hosts[alt][www]}}:{{ports[https][0]}}";
 
   promise_test(async (t) => {
+    await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
     const responder_html = `${wwwAlt}/storage-access-api/resources/script-with-cookie-header.py?script=embedded_responder.js`;
     const [frame1, frame2] = await Promise.all([
       CreateFrame(responder_html),
@@ -18,34 +19,28 @@
     t.add_cleanup(async () => {
       await test_driver.delete_all_cookies();
       await SetPermissionInFrame(frame1, [{ name: 'storage-access' }, 'prompt']);
+      await MaybeSetStorageAccess(wwwAlt + "/", "*", "allowed");
     });
 
     await SetPermissionInFrame(frame1, [{ name: 'storage-access' }, 'granted']);
-    await fetch(`${wwwAlt}/cookies/resources/set.py?cookie=monster;Secure;SameSite=None;Path=/`,
-      { mode: "no-cors", credentials: "include" }).then((resp) => resp.text());
-
-    await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
-    t.add_cleanup(async () => {
-      await MaybeSetStorageAccess(wwwAlt + "/", "*", "allowed");
-    });
 
     assert_false(await FrameHasStorageAccess(frame1), "frame1 should not have storage access initially.");
     assert_false(await FrameHasStorageAccess(frame2), "frame2 should not have storage access initially.");
 
-    assert_false(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame1)), "frame1 should not have access via document.cookie.");
-    assert_false(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame2)), "frame2 should not have access via document.cookie.");
+    assert_false(await CanFrameWriteCookies(frame1), "frame1 should not have access via document.cookie.");
+    assert_false(await CanFrameWriteCookies(frame2), "frame2 should not have access via document.cookie.");
 
     assert_true(await RequestStorageAccessInFrame(frame1), "requestStorageAccess doesn't require a gesture since the permission has already been granted.");
 
     assert_true(await FrameHasStorageAccess(frame1), "frame1 should have storage access now.");
-    assert_true(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame1)), "frame1 should now be able to access cookies via document.cookie.");
+    assert_true(await CanFrameWriteCookies(frame1), "frame1 should now be able to write cookies via document.cookie.");
 
     assert_false(await FrameHasStorageAccess(frame2), "frame2 should still not have storage access.");
-    assert_false(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame2)), "frame2 should should still be unable to access cookies via document.cookie");
+    assert_false(await CanFrameWriteCookies(frame2), "frame2 should still be unable to write cookies via document.cookie");
 
     assert_true(await RequestStorageAccessInFrame(frame2), "frame2 should be able to get storage access without a gesture.");
 
     assert_true(await FrameHasStorageAccess(frame2), "frame2 should have storage access after it requested it.");
-    assert_true(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame2)), "frame2 should be able to access cookies via document.cookie after getting storage access.");
+    assert_true(await CanFrameWriteCookies(frame2), "frame2 should be able to write cookies via document.cookie after getting storage access.");
   }, "Grants have per-frame scope");
 })();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-site-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-site-iframe.sub.https.window.js
new file mode 100644
index 0000000000000..53f90de75d06f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-cross-site-iframe.sub.https.window.js
@@ -0,0 +1,9 @@
+// META: script=helpers.js
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+'use strict';
+
+(async function() {
+  // Create a test with a single-child cross-site iframe.
+  RunTestsInIFrame('https://{{hosts[alt][www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=cross-site-frame');
+})();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-insecure.sub.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-insecure.sub.window.js
index f845f0647ca00..34d275b5ae88b 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-insecure.sub.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-insecure.sub.window.js
@@ -43,21 +43,21 @@ if (topLevelDocument) {
 
   // Create a test with a single-child same-origin iframe.
   const sameOriginFramePromise = RunTestsInIFrame(
-      'resources/requestStorageAccess-iframe.html?testCase=same-origin-frame&rootdocument=false');
+      'resources/requestStorageAccess-iframe.html?testCase=same-origin-frame');
 
   // Create a test with a single-child cross-origin iframe.
   const crossOriginFramePromise = RunTestsInIFrame(
-      'http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/requestStorageAccess-iframe.html?testCase=cross-origin-frame&rootdocument=false');
+      'http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/requestStorageAccess-iframe.html?testCase=cross-origin-frame');
 
   // Validate the nested-iframe scenario where the same-origin frame
   // containing the tests is not the first child.
   const nestedSameOriginFramePromise = RunTestsInNestedIFrame(
-      'resources/requestStorageAccess-iframe.html?testCase=nested-same-origin-frame&rootdocument=false');
+      'resources/requestStorageAccess-iframe.html?testCase=nested-same-origin-frame');
 
   // Validate the nested-iframe scenario where the cross-origin frame
   // containing the tests is not the first child.
   const nestedCrossOriginFramePromise = RunTestsInNestedIFrame(
-      'http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/requestStorageAccess-iframe.html?testCase=nested-cross-origin-frame&rootdocument=false');
+      'http://{{domains[www]}}:{{ports[http][0]}}/storage-access-api/resources/requestStorageAccess-iframe.html?testCase=nested-cross-origin-frame');
 
   // Because the iframe tests expect no user activation, and because they
   // load asynchronously, we want to first run those tests before simulating
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-origin-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-origin-iframe.sub.https.window.js
index e79148b4c44ee..eeac9c2a40172 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-origin-iframe.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-origin-iframe.sub.https.window.js
@@ -6,5 +6,5 @@
 (async function() {
   // Validate the nested-iframe scenario where the cross-origin frame
   // containing the tests is not the first child.
-  RunTestsInNestedIFrame('https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=nested-cross-origin-frame&rootdocument=false');
+  RunTestsInNestedIFrame('https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=nested-cross-origin-frame');
 })();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-site-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-site-iframe.sub.https.window.js
new file mode 100644
index 0000000000000..59442d97c9385
--- /dev/null
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-cross-site-iframe.sub.https.window.js
@@ -0,0 +1,10 @@
+// META: script=helpers.js
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+'use strict';
+
+(async function() {
+  // Validate the nested-iframe scenario where the cross-site frame
+  // containing the tests is not the first child.
+  RunTestsInNestedIFrame('https://{{hosts[alt][www]}}:{{ports[https][0]}}/storage-access-api/resources/requestStorageAccess-iframe.https.html?testCase=nested-cross-site-frame');
+})();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-same-origin-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-same-origin-iframe.sub.https.window.js
index b3847bbc94722..24d82c487f954 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-same-origin-iframe.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-nested-same-origin-iframe.sub.https.window.js
@@ -5,4 +5,4 @@
 
 // Validate the nested-iframe scenario where the same-origin frame
 // containing the tests is not the first child.
-RunTestsInNestedIFrame('resources/requestStorageAccess-iframe.https.html?testCase=nested-same-origin-frame&rootdocument=false');
+RunTestsInNestedIFrame('resources/requestStorageAccess-iframe.https.html?testCase=nested-same-origin-frame');
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-same-origin-iframe.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-same-origin-iframe.sub.https.window.js
index 9c41d6cbbe439..f406ea1643d9a 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-same-origin-iframe.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess-same-origin-iframe.sub.https.window.js
@@ -4,4 +4,4 @@
 'use strict';
 
 // Create a test with a single-child same-origin iframe.
-RunTestsInIFrame('resources/requestStorageAccess-iframe.html?testCase=same-origin-frame&rootdocument=false');
+RunTestsInIFrame('resources/requestStorageAccess-iframe.https.html?testCase=same-origin-frame');
diff --git a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess.sub.https.window.js
index d673ed3069933..6a9d5f4e57720 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/requestStorageAccess.sub.https.window.js
@@ -12,7 +12,7 @@
 // don't want to recurse forever.
 const {testPrefix, topLevelDocument} = processQueryParams();
 
-if (window !== window.top) {
+if (!topLevelDocument) {
   // WPT synthesizes a top-level HTML test for this JS file, and in that case we
   // don't want to, or need to, call set_test_context.
   test_driver.set_test_context(window.top);
@@ -30,26 +30,37 @@ promise_setup(async () => {
 });
 
 promise_test(async t => {
-  if (topLevelDocument) {
+  if (topLevelDocument || testPrefix.includes('same-origin')) {
     await document.requestStorageAccess()
-    .catch(t.unreached_func("document.requestStorageAccess() call should resolve in top-level frame"));
+    .catch(t.unreached_func("document.requestStorageAccess() call should resolve in top-level frame or same-origin iframe."));
   } else {
     return promise_rejects_dom(t, "NotAllowedError", document.requestStorageAccess(),
-    "document.requestStorageAccess() call without user gesture");
+    "document.requestStorageAccess() call without user gesture.");
   }
-}, "[" + testPrefix + "] document.requestStorageAccess() should resolve in top-level frame or otherwise reject with a NotAllowedError with no user gesture");
+}, "[" + testPrefix + "] document.requestStorageAccess() should resolve in top-level frame or same-origin iframe, otherwise reject with a NotAllowedError with no user gesture.");
 
 promise_test(
-    async () => {
-      await test_driver.set_permission(
-          {name: 'storage-access'}, 'granted');
+    async (t) => {
+      await MaybeSetStorageAccess("*", "*", "blocked");
+      await test_driver.set_permission({name: 'storage-access'}, 'granted');
+      t.add_cleanup(async () => {
+        await test_driver.delete_all_cookies();
+      });
 
-      await RunCallbackWithGesture(() => document.requestStorageAccess());
+      await document.requestStorageAccess();
+
+      await fetch(`${window.location.origin}/cookies/resources/set-cookie.py?name=cookie&path=/&samesite=None&secure=`)
+          .then((resp) => resp.text());
+      const httpCookies = await fetch(`${window.location.origin}/storage-access-api/resources/echo-cookie-header.py`)
+          .then((resp) => resp.text());
+      assert_true(httpCookies.includes('cookie=1'),
+          'After obtaining storage access, subresource requests from the frame should send and set cookies.');
     },
     '[' + testPrefix +
-        '] document.requestStorageAccess() should be resolved when called properly with a user gesture');
+        '] document.requestStorageAccess() should be resolved with no user gesture when a permission grant exists, and ' +
+        'should allow cookie access');
 
-if (testPrefix == 'cross-origin-frame' || testPrefix == 'nested-cross-origin-frame') {
+if (!topLevelDocument && !testPrefix.includes('same-origin')) {
   promise_test(
       async t => {
         await RunCallbackWithGesture(() => {
@@ -72,4 +83,19 @@ if (testPrefix == 'cross-origin-frame' || testPrefix == 'nested-cross-origin-fra
       },
       '[' + testPrefix +
           '] document.requestStorageAccess() should be rejected with a NotAllowedError with denied permission');
+} else {
+  promise_test(
+      async () => {
+        await document.requestStorageAccess();
+      },
+      `[${testPrefix}] document.requestStorageAccess() should resolve without permission grant or user gesture`);
+
+  promise_test(
+      async () => {
+        await test_driver.set_permission(
+            {name: 'storage-access'}, 'denied');
+
+        await document.requestStorageAccess();
+      },
+      `[${testPrefix}] document.requestStorageAccess() should resolve with denied permission`);
 }
diff --git a/tests/wpt/web-platform-tests/storage-access-api/resources/echo-cookie-header.py b/tests/wpt/web-platform-tests/storage-access-api/resources/echo-cookie-header.py
new file mode 100644
index 0000000000000..546e76e509ad2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/storage-access-api/resources/echo-cookie-header.py
@@ -0,0 +1,4 @@
+def main(request, response):
+  cookie_header = request.headers.get(b"Cookie", b"")
+
+  return (200, [], cookie_header)
diff --git a/tests/wpt/web-platform-tests/storage-access-api/resources/embedded_responder.js b/tests/wpt/web-platform-tests/storage-access-api/resources/embedded_responder.js
index 0ff599d0bbe4d..84358bcdfc226 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/resources/embedded_responder.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/resources/embedded_responder.js
@@ -20,6 +20,10 @@ window.addEventListener("message", async (event) => {
       reply(obtainedAccess);
     }
       break;
+    case "write document.cookie":
+      document.cookie = event.data.cookie;
+      reply(undefined);
+      break;
     case "document.cookie":
       reply(document.cookie);
       break;
@@ -36,6 +40,11 @@ window.addEventListener("message", async (event) => {
     case "reload":
       window.location.reload();
       break;
+    case "httpCookies":
+      // The `httpCookies` variable is defined/set by
+      // script-with-cookie-header.py.
+      reply(httpCookies);
+      break;
     default:
   }
 });
diff --git a/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
index d1ee7700997d6..4222051c10bdc 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
@@ -34,12 +34,12 @@
     return;
   }
 
-  // We're in an iframe test now.
+  // We're in a cross-origin, same-site iframe test now.
   test_driver.set_test_context(window.top);
 
   promise_test(async t => {
     const permission = await navigator.permissions.query({name: "storage-access"});
-    assert_equals(permission.name, "storage_access");
+    assert_equals(permission.name, "storage-access");
     assert_equals(permission.state, "prompt");
   }, "Permission default state can be queried");
 
@@ -50,7 +50,7 @@
     await test_driver.set_permission({ name: 'storage-access' }, 'granted');
 
     const permission = await navigator.permissions.query({name: "storage-access"});
-    assert_equals(permission.name, "storage_access");
+    assert_equals(permission.name, "storage-access");
     assert_equals(permission.state, "granted");
   }, "Permission granted state can be queried");
 
@@ -61,7 +61,7 @@
     await test_driver.set_permission({ name: 'storage-access' }, 'denied');
 
     const permission = await navigator.permissions.query({name: "storage-access"});
-    assert_equals(permission.name, "storage_access");
+    assert_equals(permission.name, "storage-access");
     assert_equals(permission.state, "denied");
 
     await test_driver.set_permission({ name: 'storage-access' }, 'prompt');
@@ -79,11 +79,11 @@
     });
 
     await test_driver.set_permission({ name: 'storage-access' }, 'granted');
-    await RunCallbackWithGesture(() => document.requestStorageAccess());
+    await document.requestStorageAccess();
 
     const event = await p;
 
-    assert_equals(event.target.name, "storage_access");
+    assert_equals(event.target.name, "storage-access");
     assert_equals(event.target.state, "granted");
   }, "Permission state can be observed");
 })();
diff --git a/tests/wpt/web-platform-tests/storage-access-api/storageAccess.testdriver.sub.html b/tests/wpt/web-platform-tests/storage-access-api/storageAccess.testdriver.sub.html
index 27e00b7cd70d5..5282cc8cc1867 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/storageAccess.testdriver.sub.html
+++ b/tests/wpt/web-platform-tests/storage-access-api/storageAccess.testdriver.sub.html
@@ -16,6 +16,7 @@
     const wwwAlt = "https://{{hosts[alt][www]}}:{{ports[https][0]}}";
 
     promise_test(async t => {
+      await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
       t.add_cleanup(async () => {
         await test_driver.delete_all_cookies();
         await MaybeSetStorageAccess(wwwAlt + "/", "*", "allowed");
@@ -24,14 +25,7 @@
       const responder_html = `${wwwAlt}/storage-access-api/resources/script-with-cookie-header.py?script=embedded_responder.js`;
       const frame = await CreateFrame(responder_html);
 
-      await fetch(`${wwwAlt}/cookies/resources/set.py?cookie=monster;Secure;SameSite=None;Path=/`,
-        { mode: "no-cors", credentials: "include" }).then((resp) => resp.text());
-
-      assert_true(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame)), "frame should have access via document.cookie.");
-
-      await MaybeSetStorageAccess(wwwAlt + "/", "*", "blocked");
-
-      assert_false(cookieStringHasCookie("cookie", "monster", await GetJSCookiesFromFrame(frame)), "frame should not have access via document.cookie.");
+      assert_false(await CanFrameWriteCookies(frame), "Cross-site iframe should not be allowed to write cookies via document.cookie.");
     });
   </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/svg/animations/animateMotion-from-to-rotate-auto.html b/tests/wpt/web-platform-tests/svg/animations/animateMotion-from-to-rotate-auto.html
new file mode 100644
index 0000000000000..faa58fe39b8e2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/animations/animateMotion-from-to-rotate-auto.html
@@ -0,0 +1,45 @@
+<!doctype html>
+<title>&lt;animateMotion> from/to animation with rotate=auto</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/SVGAnimationTestCase-testharness.js"></script>
+<svg>
+  <rect x="-200" width="200" height="100" fill="blue">
+    <animateMotion id="anim" from="0,400" to="0,-100" rotate="auto"
+                   fill="freeze" dur="4s"/>
+  </rect>
+</svg>
+<script>
+const rootSVGElement = document.querySelector('svg');
+
+function assert_bbox_position(element, x, y) {
+  const bbox = element.getBBox();
+  const epsilon = 0.5;
+  assert_approx_equals(bbox.x, x, epsilon, 'bbox x');
+  assert_approx_equals(bbox.y, y, epsilon, 'bbox y');
+}
+
+function sample1() {
+  assert_bbox_position(rootSVGElement, 0, 600);
+}
+
+function sample2() {
+  assert_bbox_position(rootSVGElement, 0, 150);
+}
+
+function sample3() {
+  assert_bbox_position(rootSVGElement, 0, -100);
+}
+
+smil_async_test(t => {
+  const expectedValues = [
+    // [animationId, time, sampleCallback]
+    ['anim', 0.0, sample1],
+    ['anim', 2.0, sample2],
+    ['anim', 4.0, sample3],
+  ];
+  runAnimationTest(t, expectedValues);
+});
+
+window.animationStartsImmediately = true;
+</script>
diff --git a/tests/wpt/web-platform-tests/svg/styling/use-element-animations.html b/tests/wpt/web-platform-tests/svg/styling/use-element-animations.html
new file mode 100644
index 0000000000000..b09606011818f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/styling/use-element-animations.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<title>SVG Test: Independent CSS animations on svg:use instantiation and corresponding element</title>
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="use-element-transitions-ref.html">
+<style>
+  use {
+    font-size: 40px;
+  }
+  g {
+    font-size: 120px;
+  }
+  @keyframes font-anim {
+    0% { /* starts from computed font-size */ }
+    100% { font-size: 80px; }
+  }
+  text {
+    animation: font-anim 100s steps(2, start);
+  }
+</style>
+<svg>
+  <use id="use_elm" xlink:href="#tmpl" />
+  <g id="g_elm">
+    <text id="tmpl" x="10" y="100">Hello!</text>
+  </g>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/styling/use-element-transitions-ref.html b/tests/wpt/web-platform-tests/svg/styling/use-element-transitions-ref.html
new file mode 100644
index 0000000000000..f564b90de8cd9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/styling/use-element-transitions-ref.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<title>Test Reference</title>
+<style>
+  use { font-size: 60px; }
+  g { font-size: 100px; }
+</style>
+<svg>
+  <use id="use_elm" xlink:href="#tmpl" />
+  <g id="g_elm">
+    <text id="tmpl" x="10" y="100">Hello!</text>
+  </g>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/styling/use-element-transitions.html b/tests/wpt/web-platform-tests/svg/styling/use-element-transitions.html
new file mode 100644
index 0000000000000..68653835f44f8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/styling/use-element-transitions.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<title>SVG Test: Independent CSS transitions on svg:use instantiation and corresponding element</title>
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="use-element-transitions-ref.html">
+<style>
+  use {
+    font-size: 40px;
+  }
+  g {
+    font-size: 120px;
+  }
+  text {
+    transition: font-size 100s steps(2, start);
+  }
+</style>
+<svg>
+  <use id="use_elm" xlink:href="#tmpl" />
+  <g id="g_elm">
+    <text id="tmpl" x="10" y="100">Hello!</text>
+  </g>
+</svg>
+<script>
+  requestAnimationFrame(() => {
+    requestAnimationFrame(() => {
+      tmpl.style.fontSize = "80px";
+      document.documentElement.classList.remove('reftest-wait');
+    });
+  });
+</script>
diff --git a/tests/wpt/web-platform-tests/svg/styling/use-element-web-animations.html b/tests/wpt/web-platform-tests/svg/styling/use-element-web-animations.html
new file mode 100644
index 0000000000000..bbf878b3a90e8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/styling/use-element-web-animations.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<title>SVG Test: Independent Web animations on svg:use instantiation and corresponding element</title>
+<link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElement">
+<link rel="match" href="use-element-transitions-ref.html">
+<style>
+  use {
+    font-size: 40px;
+  }
+  g {
+    font-size: 120px;
+  }
+</style>
+<svg>
+  <use id="use_elm" xlink:href="#tmpl" />
+  <g id="g_elm">
+    <text id="tmpl" x="10" y="100">Hello!</text>
+  </g>
+</svg>
+<script>
+  tmpl.animate([
+      { /* starts from computed font-size */ easing: "steps(2, start)"},
+      { font-size: "80px" }
+  ], 100000);
+</script>
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/lang-attribute-dynamic-ref.svg b/tests/wpt/web-platform-tests/svg/text/reftests/lang-attribute-dynamic-ref.svg
index 191adc036c352..56eebb2f7e44e 100644
--- a/tests/wpt/web-platform-tests/svg/text/reftests/lang-attribute-dynamic-ref.svg
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/lang-attribute-dynamic-ref.svg
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
   <text>
-    <tspan x="10" y="100" font-size="90" fill="lime">Quick</tspan>
+    <tspan x="10" y="100" font-size="90" lang="ja" fill="lime">Quick</tspan>
     <tspan x="10" y="200" font-size="90">Brown</tspan>
     <tspan x="10" y="300" font-size="90">Fox</tspan>
   </text>
diff --git a/tests/wpt/web-platform-tests/tools/manifest/tests/test_manifest.py b/tests/wpt/web-platform-tests/tools/manifest/tests/test_manifest.py
index a7f3d315f0c4e..5e10d9f06ad50 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/tests/test_manifest.py
+++ b/tests/wpt/web-platform-tests/tools/manifest/tests/test_manifest.py
@@ -1,10 +1,12 @@
 # mypy: ignore-errors
 
 import os
+import sys
 from unittest import mock
 
 import hypothesis as h
 import hypothesis.strategies as hs
+import pytest
 
 from .. import manifest, sourcefile, item, utils
 
@@ -119,6 +121,8 @@ def manifest_tree(draw):
     return output
 
 
+@pytest.mark.skipif(sys.version_info.major == 3 and sys.version_info.minor == 10,
+                    reason="Deadlock on shutdown with Python 3.10")
 @h.given(manifest_tree())
 # FIXME: Workaround for https://github.com/web-platform-tests/wpt/issues/22758
 @h.settings(suppress_health_check=(h.HealthCheck.too_slow,))
@@ -138,6 +142,8 @@ def test_manifest_to_json(s):
     assert loaded.to_json() == json_str
 
 
+@pytest.mark.skipif(sys.version_info.major == 3 and sys.version_info.minor == 10,
+                    reason="Deadlock on shutdown with Python 3.10")
 @h.given(manifest_tree())
 # FIXME: Workaround for https://github.com/web-platform-tests/wpt/issues/22758
 @h.settings(suppress_health_check=(h.HealthCheck.too_slow,))
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
index 9e8737e54c774..1b65d225fae30 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
@@ -39,6 +39,10 @@ class NoSuchFrameException(BidiException):
     error_code = "no such frame"
 
 
+class NoSuchScriptException(BidiException):
+    error_code = "no such script"
+
+
 class UnknownCommandException(BidiException):
     error_code = "unknown command"
 
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/script.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/script.py
index d9af11a8e2437..a33a9a7b670ba 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/script.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/script.py
@@ -44,6 +44,30 @@ def __init__(self, context: str, sandbox: Optional[str] = None):
 
 
 class Script(BidiModule):
+    @command
+    def add_preload_script(
+        self,
+        function_declaration: str,
+        arguments: Optional[List[Mapping[str, Any]]] = None,
+        sandbox: Optional[str] = None
+    ) -> Mapping[str, Any]:
+        params: MutableMapping[str, Any] = {
+            "functionDeclaration": function_declaration
+        }
+
+        if arguments is not None:
+            params["arguments"] = arguments
+        if sandbox is not None:
+            params["sandbox"] = sandbox
+
+        return params
+
+    @add_preload_script.result
+    def _add_preload_script(self, result: Mapping[str, Any]) -> Any:
+        assert "script" in result
+
+        return result["script"]
+
     @command
     def call_function(
         self,
@@ -134,3 +158,11 @@ def _get_realms(self, result: Mapping[str, Any]) -> Any:
         assert isinstance(result["realms"], list)
 
         return result["realms"]
+
+    @command
+    def remove_preload_script(self, script: str) -> Any:
+        params: MutableMapping[str, Any] = {
+            "script": script
+        }
+
+        return params
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/server.py b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/server.py
index 1fac29a6a7fb7..94b70ad93f506 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/wptserve/server.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/wptserve/server.py
@@ -573,6 +573,20 @@ def _stream_thread(self, stream_id, queue):
         response = None
         req_handler = None
 
+        def cleanup():
+            # Try to close the files
+            # Ignore any exception (e.g. if the file handle was already closed for some reason).
+            if rfile:
+                try:
+                    rfile.close()
+                except OSError:
+                    pass
+            if wfile:
+                try:
+                    wfile.close()
+                except OSError:
+                    pass
+
         while not self.close_connection:
             try:
                 frame = queue.get(True, 1)
@@ -582,10 +596,7 @@ def _stream_thread(self, stream_id, queue):
 
             self.logger.debug(f'({self.uid} - {stream_id}) {str(frame)}')
             if isinstance(frame, RequestReceived):
-                if rfile:
-                    rfile.close()
-                if wfile:
-                    wfile.close()
+                cleanup()
 
                 pipe_rfile, pipe_wfile = os.pipe()
                 (rfile, wfile) = os.fdopen(pipe_rfile, 'rb'), os.fdopen(pipe_wfile, 'wb')
@@ -626,10 +637,7 @@ def _stream_thread(self, stream_id, queue):
                                     (self.uid, stream_id))
                 break
 
-        if rfile:
-            rfile.close()
-        if wfile:
-            wfile.close()
+        cleanup()
 
     def frame_handler(self, request, response, handler):
         try:
@@ -854,7 +862,7 @@ def start(self):
         self.logger.info(f"Starting {http_type} server on {http_scheme}://{self.host}:{self.port}")
         self.started = True
         self.server_thread = threading.Thread(target=self.httpd.serve_forever)
-        self.server_thread.setDaemon(True)  # don't hang on exit
+        self.server_thread.daemon = True  # don't hang on exit
         self.server_thread.start()
 
     def stop(self):
diff --git a/tests/wpt/web-platform-tests/url/resources/setters_tests.json b/tests/wpt/web-platform-tests/url/resources/setters_tests.json
index 9c4eedc60893e..6cab766eaa3bf 100644
--- a/tests/wpt/web-platform-tests/url/resources/setters_tests.json
+++ b/tests/wpt/web-platform-tests/url/resources/setters_tests.json
@@ -1592,6 +1592,17 @@
                 "port": "8080"
             }
         },
+        {
+            "comment": "Setting port to a string that doesn't parse as a number",
+            "href": "http://example.net:8080/path",
+            "new_value": "randomstring",
+            "expected": {
+                "href": "http://example.net:8080/path",
+                "host": "example.net:8080",
+                "hostname": "example.net",
+                "port": "8080"
+            }
+        },
         {
             "comment": "Port numbers are 16 bit integers, overflowing is an error",
             "href": "non-special://example.net:8080/path",
diff --git a/tests/wpt/web-platform-tests/url/urlsearchparams-size.any.js b/tests/wpt/web-platform-tests/url/urlsearchparams-size.any.js
new file mode 100644
index 0000000000000..7b3abc7c0b421
--- /dev/null
+++ b/tests/wpt/web-platform-tests/url/urlsearchparams-size.any.js
@@ -0,0 +1,34 @@
+test(() => {
+  const params = new URLSearchParams("a=1&b=2&a=3");
+  assert_equals(params.size, 3);
+
+  params.delete("a");
+  assert_equals(params.size, 1);
+}, "URLSearchParams's size and deletion");
+
+test(() => {
+  const params = new URLSearchParams("a=1&b=2&a=3");
+  assert_equals(params.size, 3);
+
+  params.append("b", "4");
+  assert_equals(params.size, 4);
+}, "URLSearchParams's size and addition");
+
+test(() => {
+  const url = new URL("http://localhost/query?a=1&b=2&a=3");
+  assert_equals(url.searchParams.size, 3);
+
+  url.searchParams.delete("a");
+  assert_equals(url.searchParams.size, 1);
+
+  url.searchParams.append("b", 4);
+  assert_equals(url.searchParams.size, 2);
+}, "URLSearchParams's size when obtained from a URL");
+
+test(() => {
+  const url = new URL("http://localhost/query?a=1&b=2&a=3");
+  assert_equals(url.searchParams.size, 3);
+
+  url.search = "?";
+  assert_equals(url.searchParams.size, 0);
+}, "URLSearchParams's size when obtained from a URL and using .search");
diff --git a/tests/wpt/web-platform-tests/web-nfc/resources/nfc-helpers.js b/tests/wpt/web-platform-tests/web-nfc/resources/nfc-helpers.js
index 35154e287d813..10229f0b06d96 100644
--- a/tests/wpt/web-platform-tests/web-nfc/resources/nfc-helpers.js
+++ b/tests/wpt/web-platform-tests/web-nfc/resources/nfc-helpers.js
@@ -47,7 +47,7 @@ function nfc_test(func, name, properties) {
 }
 
 const test_text_data = 'Test text data.';
-const test_text_byte_array = new TextEncoder('utf-8').encode(test_text_data);
+const test_text_byte_array = new TextEncoder().encode(test_text_data);
 const test_number_data = 42;
 const test_json_data = {level: 1, score: 100, label: 'Game'};
 const test_url_data = 'https://w3c.github.io/web-nfc/';
@@ -124,7 +124,7 @@ function createTextRecord(data, encoding, lang) {
 
 function createMimeRecordFromJson(json) {
   return createRecord(
-      'mime', new TextEncoder('utf-8').encode(JSON.stringify(json)),
+      'mime', new TextEncoder().encode(JSON.stringify(json)),
       test_record_id, 'application/json');
 }
 
diff --git a/tests/wpt/web-platform-tests/webauthn/createcredential-minpinlength.https.html b/tests/wpt/web-platform-tests/webauthn/createcredential-minpinlength.https.html
index 09b045d448f41..a92898c848c01 100644
--- a/tests/wpt/web-platform-tests/webauthn/createcredential-minpinlength.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/createcredential-minpinlength.https.html
@@ -25,7 +25,7 @@
     // The extension results will be in the authenticator outputs.
     assert_true(new Uint8Array(credential.response.getAuthenticatorData())
                     .toString()
-                    .includes(new TextEncoder("utf-8")
+                    .includes(new TextEncoder()
                                   .encode("minPinLength")
                                   .toString()));
   }, "navigator.credentials.create() with minPinLength requested");
diff --git a/tests/wpt/web-platform-tests/webauthn/resources/common-inputs.js b/tests/wpt/web-platform-tests/webauthn/resources/common-inputs.js
index 6fa0005f60fa2..e60fed45e8f4d 100644
--- a/tests/wpt/web-platform-tests/webauthn/resources/common-inputs.js
+++ b/tests/wpt/web-platform-tests/webauthn/resources/common-inputs.js
@@ -24,7 +24,7 @@ const AUTHENTICATOR_SELECTION_CRITERIA = {
 };
 
 const MAKE_CREDENTIAL_OPTIONS = {
-    challenge: new TextEncoder("utf-8").encode(CHALLENGE),
+    challenge: new TextEncoder().encode(CHALLENGE),
     rp: PUBLIC_KEY_RP,
     user: PUBLIC_KEY_USER,
     pubKeyCredParams: PUBLIC_KEY_PARAMETERS,
diff --git a/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html b/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
index 4b8b08d975ebb..5751928301ff6 100644
--- a/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
+++ b/tests/wpt/web-platform-tests/webauthn/webauthn-testdriver-basic.https.html
@@ -40,7 +40,7 @@
     new Cbor(credential.response.attestationObject).getCBOR();
 
   let rpIdHash = new Uint8Array(await crypto.subtle.digest(
-    { name: "SHA-256" }, new TextEncoder("utf-8").encode(PUBLIC_KEY_RP.id)));
+    { name: "SHA-256" }, new TextEncoder().encode(PUBLIC_KEY_RP.id)));
 
   let authenticatorData = parseAuthenticatorData(attestationObject.authData);
 
@@ -59,7 +59,7 @@
 promise_test(async t => {
   let assertion = await navigator.credentials.get({
     publicKey: {
-      challenge: new TextEncoder("utf-8").encode(CHALLENGE),
+      challenge: new TextEncoder().encode(CHALLENGE),
       rpId: PUBLIC_KEY_RP.id,
       allowCredentials: [{
         type: "public-key",
@@ -87,7 +87,7 @@
   let authenticatorData = parseAuthenticatorData(binaryAuthenticatorData);
 
   let rpIdHash = new Uint8Array(await crypto.subtle.digest(
-    { name: "SHA-256" }, new TextEncoder("utf-8").encode(PUBLIC_KEY_RP.id)));
+    { name: "SHA-256" }, new TextEncoder().encode(PUBLIC_KEY_RP.id)));
 
   assert_array_equals(authenticatorData.rpIdHash, rpIdHash)
   assert_true(authenticatorData.flags.up);
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/__init__.py
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/add_preload_script_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/add_preload_script_tentative.py
new file mode 100644
index 0000000000000..98c01554ee0ba
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/add_preload_script_tentative.py
@@ -0,0 +1,172 @@
+import pytest
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("type_hint", ["tab", "window"])
+async def test_add_preload_script(
+    bidi_session, add_preload_script, top_context, inline, type_hint
+):
+    await add_preload_script(function_declaration="() => { window.foo='bar'; }")
+
+    # Check that preload script didn't apply the changes to the current context
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(top_context["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "undefined"}
+
+    new_context = await bidi_session.browsing_context.create(type_hint=type_hint)
+
+    # Check that preload script applied the changes to the window
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_context["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "string", "value": "bar"}
+
+    url = inline("<div>foo</div>")
+    await bidi_session.browsing_context.navigate(
+        context=new_context["context"],
+        url=url,
+        wait="complete",
+    )
+
+    # Check that preload script was applied after navigation
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_context["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "string", "value": "bar"}
+
+
+@pytest.mark.asyncio
+async def test_add_same_preload_script_twice(add_preload_script):
+    script_1 = await add_preload_script(function_declaration="() => { return 42; }")
+    script_2 = await add_preload_script(function_declaration="() => { return 42; }")
+
+    # Make sure that preload scripts have different ids
+    assert script_1 != script_2
+
+
+@pytest.mark.asyncio
+async def test_script_order(
+    bidi_session, add_preload_script, subscribe_events, new_tab, inline
+):
+    preload_script_console_text = "preload script"
+
+    await add_preload_script(
+        function_declaration=f"() => {{ console.log('{preload_script_console_text}') }}"
+    )
+    await subscribe_events(events=["log.entryAdded"], contexts=[new_tab["context"]])
+
+    events = []
+
+    async def on_event(method, data):
+        # Ignore errors and warnings which might occur during test execution
+        if data["level"] == "info":
+            events.append(data)
+
+    remove_listener = bidi_session.add_event_listener("log.entryAdded", on_event)
+
+    user_console_text = "user script"
+    url = inline(f"<script>console.log('{user_console_text}')</script>")
+
+    await bidi_session.browsing_context.navigate(
+        context=new_tab["context"],
+        url=url,
+        wait="complete",
+    )
+
+    assert len(events) > 0
+    # Make sure that console event from preload script comes first
+    events[0]["text"] == preload_script_console_text
+
+    remove_listener()
+
+
+@pytest.mark.asyncio
+async def test_add_preload_script_in_iframe(
+    bidi_session, add_preload_script, new_tab, test_page_same_origin_frame
+):
+    await add_preload_script(function_declaration="() => { window.bar='foo'; }")
+
+    await bidi_session.browsing_context.navigate(
+        context=new_tab["context"],
+        url=test_page_same_origin_frame,
+        wait="complete",
+    )
+
+    # Check that preload script applied the changes to the window
+    result = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "string", "value": "foo"}
+
+    contexts = await bidi_session.browsing_context.get_tree(root=new_tab["context"])
+
+    assert len(contexts[0]["children"]) == 1
+    frame_context = contexts[0]["children"][0]
+
+    # Check that preload script applied the changes to the iframe
+    result = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(frame_context["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "string", "value": "foo"}
+
+
+@pytest.mark.asyncio
+async def test_add_preload_script_with_error(
+    bidi_session, add_preload_script, subscribe_events, inline, new_tab, wait_for_event
+):
+    await add_preload_script(
+        function_declaration=f"() => {{ throw Error('error in preload script') }}"
+    )
+
+    await subscribe_events(events=["browsingContext.load", "log.entryAdded"])
+
+    on_entry = wait_for_event("log.entryAdded")
+    on_load = wait_for_event("browsingContext.load")
+
+    url = inline("<div>foo</div>")
+    await bidi_session.browsing_context.navigate(context=new_tab["context"], url=url)
+    error_event = await on_entry
+
+    # Make sure that page is loaded
+    await on_load
+
+    # Make sure that exception from preloaded script was reported
+    assert error_event["level"] == "error"
+    assert error_event["text"] == "Error: error in preload script"
+
+
+@pytest.mark.asyncio
+async def test_page_script_can_access_preload_script_properties(
+    bidi_session, add_preload_script, new_tab, inline
+):
+    await add_preload_script(
+        function_declaration="() => { window.preloadScriptFunction = () => window.baz = 42; }"
+    )
+
+    url = inline("<script>window.preloadScriptFunction()</script>")
+    await bidi_session.browsing_context.navigate(
+        context=new_tab["context"],
+        url=url,
+        wait="complete",
+    )
+
+    # Check that page script could access a function set up by the preload script
+    result = await bidi_session.script.evaluate(
+        expression="window.baz",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "number", "value": 42}
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/invalid_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/invalid_tentative.py
new file mode 100644
index 0000000000000..6a87d5c2fa7a5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/invalid_tentative.py
@@ -0,0 +1,29 @@
+import pytest
+import webdriver.bidi.error as error
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("function_declaration", [None, False, 42, {}, []])
+async def test_params_function_declaration_invalid_type(bidi_session, function_declaration):
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.script.add_preload_script(
+            function_declaration=function_declaration
+        ),
+
+
+@pytest.mark.parametrize("arguments", [False, "SOME_STRING", 42, {}])
+async def test_params_arguments_invalid_type(bidi_session, arguments):
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.script.add_preload_script(
+            function_declaration="() => {}",
+            arguments=arguments,
+        )
+
+
+@pytest.mark.parametrize("sandbox", [False, 42, {}, []])
+async def test_params_sandbox_invalid_type(bidi_session, sandbox):
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.script.add_preload_script(
+            function_declaration="() => {}", sandbox=sandbox
+        ),
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/sandbox_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/sandbox_tentative.py
new file mode 100644
index 0000000000000..364eb5ce1a35e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/add_preload_script/sandbox_tentative.py
@@ -0,0 +1,70 @@
+import pytest
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+@pytest.mark.asyncio
+async def test_add_preload_script_to_sandbox(bidi_session, add_preload_script):
+    # Add preload script to make changes in window
+    await add_preload_script(function_declaration="() => { window.foo = 1; }")
+    # Add preload script to make changes in sandbox
+    await add_preload_script(
+        function_declaration="() => { window.bar = 2; }", sandbox="sandbox"
+    )
+
+    new_tab = await bidi_session.browsing_context.create(type_hint="tab")
+
+    # Check that changes from the first preload script are not present in sandbox
+    result_in_sandbox = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_tab["context"], "sandbox"),
+        await_promise=True,
+    )
+    assert result_in_sandbox == {"type": "undefined"}
+
+    # Make sure that changes from the second preload script are not present in window
+    result = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "undefined"}
+
+    # Make sure that changes from the second preload script are present in sandbox
+    result_in_sandbox = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(new_tab["context"], "sandbox"),
+        await_promise=True,
+    )
+    assert result_in_sandbox == {"type": "number", "value": 2}
+
+
+@pytest.mark.asyncio
+async def test_remove_properties_set_by_preload_script(
+    bidi_session, add_preload_script, new_tab, inline
+):
+    await add_preload_script(function_declaration="() => { window.foo = 42 }")
+    await add_preload_script(function_declaration="() => { window.foo = 50 }", sandbox="sandbox_1")
+
+    url = inline("<script>delete window.foo</script>")
+    await bidi_session.browsing_context.navigate(
+        context=new_tab["context"],
+        url=url,
+        wait="complete",
+    )
+
+    # Check that page script could access a function set up by the preload script
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "undefined"}
+
+    # Check that page script could access a function set up by the preload script
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_tab["context"], sandbox="sandbox_1"),
+        await_promise=True,
+    )
+    assert result == {"type": "number", "value": 50}
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/result_node.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/result_node.py
index c7ec990ba5c15..08e47be5f714d 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/result_node.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/result_node.py
@@ -68,7 +68,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "p",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -77,7 +76,6 @@
                         "type": "node",
                         "value": {
                             "childNodeCount": 0,
-                            "children": None,
                             "nodeType": 3,
                             "nodeValue": "Lorem",
                         }
@@ -102,7 +100,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 1,
-                            "children": None,
                             "localName": "p",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -112,7 +109,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "br",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -389,7 +385,6 @@ async def test_comment_node(
                         "type": "node",
                         "value": {
                             "childNodeCount": 0,
-                            "children": None,
                             "nodeType": 10
                         }
                     }, {
@@ -397,7 +392,6 @@ async def test_comment_node(
                         "value": {
                             "attributes": {},
                             "childNodeCount": 2,
-                            "children": None,
                             "localName": "html",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -521,7 +515,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                 "value": {
                     "attributes": {},
                     "childNodeCount": 0,
-                    "children": None,
                     "localName": "span",
                     "namespaceURI": "http://www.w3.org/1999/xhtml",
                     "nodeType": 1
@@ -545,7 +538,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "span",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -564,7 +556,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "span",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/evaluate/result_node.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/evaluate/result_node.py
index d3eccc2fdad42..0d0589a5f3816 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/evaluate/result_node.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/evaluate/result_node.py
@@ -68,7 +68,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "p",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -77,7 +76,6 @@
                         "type": "node",
                         "value": {
                             "childNodeCount": 0,
-                            "children": None,
                             "nodeType": 3,
                             "nodeValue": "Lorem",
                         }
@@ -102,7 +100,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 1,
-                            "children": None,
                             "localName": "p",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -112,7 +109,6 @@
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "br",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -383,7 +379,6 @@ async def test_comment_node(bidi_session, inline, top_context, expression, expec
                         "type": "node",
                         "value": {
                             "childNodeCount": 0,
-                            "children": None,
                             "nodeType": 10
                         }
                     }, {
@@ -391,7 +386,6 @@ async def test_comment_node(bidi_session, inline, top_context, expression, expec
                         "value": {
                             "attributes": {},
                             "childNodeCount": 2,
-                            "children": None,
                             "localName": "html",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -511,7 +505,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                 "value": {
                     "attributes": {},
                     "childNodeCount": 0,
-                    "children": None,
                     "localName": "span",
                     "namespaceURI": "http://www.w3.org/1999/xhtml",
                     "nodeType": 1
@@ -535,7 +528,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "span",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
@@ -554,7 +546,6 @@ async def test_node_within_object(bidi_session, inline, top_context):
                         "value": {
                             "attributes": {},
                             "childNodeCount": 0,
-                            "children": None,
                             "localName": "span",
                             "namespaceURI": "http://www.w3.org/1999/xhtml",
                             "nodeType": 1
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/__init__.py
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/invalid_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/invalid_tentative.py
new file mode 100644
index 0000000000000..f32c5f57cac33
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/invalid_tentative.py
@@ -0,0 +1,15 @@
+import pytest
+import webdriver.bidi.error as error
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("script", [None, False, 42, {}, []])
+async def test_params_script_invalid_type(bidi_session, script):
+    with pytest.raises(error.InvalidArgumentException):
+        await bidi_session.script.remove_preload_script(script=script),
+
+
+async def test_params_script_invalid_value(bidi_session):
+    with pytest.raises(error.NoSuchScriptException):
+        await bidi_session.script.remove_preload_script(script="foo"),
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/remove_preload_script_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/remove_preload_script_tentative.py
new file mode 100644
index 0000000000000..b92fb31af0418
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/remove_preload_script_tentative.py
@@ -0,0 +1,80 @@
+import pytest
+import webdriver.bidi.error as error
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("type_hint", ["tab", "window"])
+async def test_remove_preload_script(bidi_session, type_hint):
+    script = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.foo='bar'; }"
+    )
+
+    new_context = await bidi_session.browsing_context.create(type_hint=type_hint)
+
+    result = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_context["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "string", "value": "bar"}
+
+    await bidi_session.script.remove_preload_script(script=script)
+
+    new_tab_2 = await bidi_session.browsing_context.create(type_hint=type_hint)
+
+    # Check that changes from preload script were not applied after script was removed
+    result_2 = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_tab_2["context"]),
+        await_promise=True,
+    )
+    assert result_2 == {"type": "undefined"}
+
+
+@pytest.mark.asyncio
+async def test_remove_preload_script_twice(bidi_session):
+    script = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.foo='bar'; }"
+    )
+
+    await bidi_session.script.remove_preload_script(script=script)
+
+    # Check that we can not remove the same script twice
+    with pytest.raises(error.NoSuchScriptException):
+        await bidi_session.script.remove_preload_script(script=script)
+
+
+@pytest.mark.asyncio
+async def test_remove_one_of_preload_scripts(bidi_session):
+    script_1 = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.bar='foo'; }"
+    )
+    script_2 = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.baz='bar'; }"
+    )
+
+    # Remove one of the scripts
+    await bidi_session.script.remove_preload_script(script=script_1)
+
+    new_tab = await bidi_session.browsing_context.create(type_hint="tab")
+
+    # Check that the first script didn't run
+    result = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result == {"type": "undefined"}
+
+    # Check that the second script still applied the changes to the window
+    result_2 = await bidi_session.script.evaluate(
+        expression="window.baz",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result_2 == {"type": "string", "value": "bar"}
+
+    # Clean up the second script
+    await bidi_session.script.remove_preload_script(script=script_2)
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/sandbox_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/sandbox_tentative.py
new file mode 100644
index 0000000000000..32befe7f057a0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/remove_preload_script/sandbox_tentative.py
@@ -0,0 +1,42 @@
+import pytest
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+@pytest.mark.asyncio
+async def test_remove_preload_script_from_sandbox(bidi_session):
+    # Add preload script to make changes in window
+    script_1 = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.foo = 1; }",
+    )
+    # Add preload script to make changes in sandbox
+    script_2 = await bidi_session.script.add_preload_script(
+        function_declaration="() => { window.bar = 2; }", sandbox="sandbox"
+    )
+
+    # Remove first preload script
+    await bidi_session.script.remove_preload_script(
+        script=script_1,
+    )
+    # Remove second preload script
+    await bidi_session.script.remove_preload_script(
+        script=script_2,
+    )
+
+    new_tab = await bidi_session.browsing_context.create(type_hint="tab")
+
+    # Make sure that changes from first preload script were not applied
+    result_in_window = await bidi_session.script.evaluate(
+        expression="window.foo",
+        target=ContextTarget(new_tab["context"]),
+        await_promise=True,
+    )
+    assert result_in_window == {"type": "undefined"}
+
+    # Make sure that changes from second preload script were not applied
+    result_in_sandbox = await bidi_session.script.evaluate(
+        expression="window.bar",
+        target=ContextTarget(new_tab["context"], "sandbox"),
+        await_promise=True,
+    )
+    assert result_in_sandbox == {"type": "undefined"}
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/get_active_element/get.py b/tests/wpt/web-platform-tests/webdriver/tests/get_active_element/get.py
index 2b79ebd584851..1d2960c88c5f5 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/get_active_element/get.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/get_active_element/get.py
@@ -57,6 +57,17 @@ def test_success_input(session, inline):
             <p>Another element</p>
         </body>""")
 
+    # Per spec, autofocus candidates will be
+    # flushed by next paint, so we use rAF here to
+    # ensure the candidates are flushed.
+    session.execute_async_script(
+        """
+        const resolve = arguments[0];
+        window.requestAnimationFrame(function() {
+            window.requestAnimationFrame(resolve);
+        });
+        """
+    )
     response = get_active_element(session)
     element = assert_success(response)
     assert_is_active_element(session, element)
@@ -71,6 +82,17 @@ def test_success_input_non_interactable(session, inline):
             <p>Another element</p>
         </body>""")
 
+    # Per spec, autofocus candidates will be
+    # flushed by next paint, so we use rAF here to
+    # ensure the candidates are flushed.
+    session.execute_async_script(
+        """
+        const resolve = arguments[0];
+        window.requestAnimationFrame(function() {
+            window.requestAnimationFrame(resolve);
+        });
+        """
+    )
     response = get_active_element(session)
     element = assert_success(response)
     assert_is_active_element(session, element)
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
index 7842e325a026a..6273b8f157581 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
@@ -3,10 +3,37 @@
 
 import pytest
 import webdriver
-from webdriver.bidi.error import InvalidArgumentException, NoSuchFrameException
+from webdriver.bidi.error import (
+    InvalidArgumentException,
+    NoSuchFrameException,
+    NoSuchScriptException,
+)
 from webdriver.bidi.modules.script import ContextTarget
 
 
+@pytest.fixture
+async def add_preload_script(bidi_session):
+    preload_scripts_ids = []
+
+    async def add_preload_script(function_declaration, arguments=None, sandbox=None):
+        script = await bidi_session.script.add_preload_script(
+            function_declaration=function_declaration,
+            arguments=arguments,
+            sandbox=sandbox,
+        )
+        preload_scripts_ids.append(script)
+
+        return script
+
+    yield add_preload_script
+
+    for script in reversed(preload_scripts_ids):
+        try:
+            await bidi_session.script.remove_preload_script(script=script)
+        except (InvalidArgumentException, NoSuchScriptException):
+            pass
+
+
 @pytest.fixture
 async def subscribe_events(bidi_session):
     subscriptions = [];
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCRtpReceiver-getStats.https.html b/tests/wpt/web-platform-tests/webrtc/RTCRtpReceiver-getStats.https.html
index c4a6b4d54abd3..3ba6c71278697 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCRtpReceiver-getStats.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCRtpReceiver-getStats.https.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCRtpReceiver.prototype.getStats</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -122,4 +123,23 @@
     validateStatsReport(statsReportSecond);
   }, 'receiver.getStats() should work with a closed PeerConnection');
 
+  promise_test(async t => {
+    const caller = new RTCPeerConnection();
+    t.add_cleanup(() => caller.close());
+    const callee = new RTCPeerConnection();
+    t.add_cleanup(() => callee.close());
+    const stream = await getNoiseStream({audio:true});
+    t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+    const [track] = stream.getTracks();
+    caller.addTrack(track, stream);
+
+    exchangeIceCandidates(caller, callee);
+    exchangeIceCandidates(callee, caller);
+    await exchangeOfferAnswer(caller, callee);
+    await waitForIceStateChange(caller, ['checking']);
+    const receiver = callee.getReceivers()[0];
+    const statsReport = await receiver.getStats();
+    assert_stats_report_has_stats(statsReport, ['candidate-pair', 'local-candidate', 'remote-candidate']);
+  }, 'receiver.getStats() should return stats report containing ICE candidate stats');
+
 </script>
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCRtpSender-getStats.https.html b/tests/wpt/web-platform-tests/webrtc/RTCRtpSender-getStats.https.html
index 70c633232325b..2b7dbe9e746fc 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCRtpSender-getStats.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCRtpSender-getStats.https.html
@@ -1,5 +1,6 @@
 <!doctype html>
 <meta charset=utf-8>
+<meta name="timeout" content="long">
 <title>RTCRtpSender.prototype.getStats</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -72,4 +73,22 @@
     assert_stats_report_has_stats(statsReport, ['outbound-rtp']);
   }, 'sender.getStats() via addTrack should return stats report containing outbound-rtp stats');
 
+  promise_test(async t => {
+    const caller = new RTCPeerConnection();
+    t.add_cleanup(() => caller.close());
+    const callee = new RTCPeerConnection();
+    t.add_cleanup(() => callee.close());
+    const stream = await getNoiseStream({audio:true});
+    t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+    const [track] = stream.getTracks();
+    const { sender } = caller.addTransceiver(track);
+
+    exchangeIceCandidates(caller, callee);
+    exchangeIceCandidates(callee, caller);
+    await exchangeOfferAnswer(caller, callee);
+    await waitForIceStateChange(caller, ['checking']);
+    const statsReport = await sender.getStats();
+    assert_stats_report_has_stats(statsReport, ['candidate-pair', 'local-candidate', 'remote-candidate']);
+  }, 'sender.getStats() should return stats report containing ICE candidate stats');
+
 </script>
diff --git a/tests/wpt/web-platform-tests/webtransport/constructor.https.any.js b/tests/wpt/web-platform-tests/webtransport/constructor.https.any.js
index 4312eb32857b6..acb91d84aae34 100644
--- a/tests/wpt/web-platform-tests/webtransport/constructor.https.any.js
+++ b/tests/wpt/web-platform-tests/webtransport/constructor.https.any.js
@@ -20,6 +20,25 @@ for (const url of BAD_URLS) {
   }, `WebTransport constructor should reject URL '${url}'`);
 }
 
+const OPTIONS = [
+  { allowPooling: true },
+  { requireUnreliable: true },
+  { allowPooling: true, requireUnreliable: true },
+  { congestionControl: "default" },
+  { congestionControl: "throughput" },
+  { congestionControl: "low-latency" },
+  { allowPooling: true, requireUnreliable: true, congestionControl: "low-latency" },
+  // XXX Need to test serverCertificateHashes
+];
+
+for (const options of OPTIONS) {
+  promise_test(async t => {
+    const wt = new WebTransport(`https://${HOST}:0/`, options );
+    await wt.ready;
+    wt.close();
+  }, "WebTransport constructor should allow options " + JSON.stringify(options));
+}
+
 promise_test(async t => {
   const wt = new WebTransport(`https://${HOST}:0/`);