diff --git a/tests/wpt/meta-legacy-layout/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/meta-legacy-layout/FileAPI/url/url-in-tags-revoke.window.js.ini
index cdeaf7f7080..282ab0b2525 100644
--- a/tests/wpt/meta-legacy-layout/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/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/meta-legacy-layout/css/CSS2/linebox/inline-negative-margin-001.html.ini b/tests/wpt/meta-legacy-layout/css/CSS2/linebox/inline-negative-margin-001.html.ini
index 5e3a96e5999..a057f038339 100644
--- a/tests/wpt/meta-legacy-layout/css/CSS2/linebox/inline-negative-margin-001.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/CSS2/linebox/inline-negative-margin-001.html.ini
@@ -8,5 +8,8 @@
   [[data-expected-height\] 3]
     expected: FAIL
 
-  [[data-expected-height\] 4]
+  [[data-expected-height\] 1]
+    expected: FAIL
+
+  [[data-expected-height\] 2]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini b/tests/wpt/meta-legacy-layout/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
index 5496474410b..a647125277a 100644
--- a/tests/wpt/meta-legacy-layout/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
@@ -1,2 +1,2 @@
 [mix-blend-mode-animation.html]
-  expected: FAIL
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-animations/computed-style-animation-parsing.html.ini b/tests/wpt/meta-legacy-layout/css/css-animations/computed-style-animation-parsing.html.ini
index f42522d2ece..87900ff65f0 100644
--- a/tests/wpt/meta-legacy-layout/css/css-animations/computed-style-animation-parsing.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-animations/computed-style-animation-parsing.html.ini
@@ -10,3 +10,9 @@
 
   [Test an animation name that is the same as a possible running state.]
     expected: FAIL
+
+  [Test an animation name that is the same as a possible animation timing-function.]
+    expected: FAIL
+
+  [Test an animation name that is the same as a possible animation iteration-count.]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-animations/parsing/animation-computed.html.ini b/tests/wpt/meta-legacy-layout/css/css-animations/parsing/animation-computed.html.ini
index 3f07a8458f3..724766664f0 100644
--- a/tests/wpt/meta-legacy-layout/css/css-animations/parsing/animation-computed.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-animations/parsing/animation-computed.html.ini
@@ -67,3 +67,12 @@
 
   [Default animation value]
     expected: FAIL
+
+  [Property animation value 'ease-in-out']
+    expected: FAIL
+
+  [Property animation value 'none, none']
+    expected: FAIL
+
+  [Animation with a delay but no duration]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini
new file mode 100644
index 00000000000..f43930d9270
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-background-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini
new file mode 100644
index 00000000000..7f9a0e4a2e6
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-background-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini
new file mode 100644
index 00000000000..512f62ceace
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-border-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini
new file mode 100644
index 00000000000..18def32156c
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-border-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini
new file mode 100644
index 00000000000..61d2d858d76
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-outline-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini
new file mode 100644
index 00000000000..6804635b254
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-outline-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini
new file mode 100644
index 00000000000..89e7216c9d1
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini
@@ -0,0 +1,2 @@
+[at-supports-selector-webkit-slider-thumb.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-reload.html.ini b/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-reload.html.ini
new file mode 100644
index 00000000000..bc77583f93e
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-fonts/font-size-adjust-reload.html.ini
@@ -0,0 +1,2 @@
+[font-size-adjust-reload.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini b/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
new file mode 100644
index 00000000000..e35a452a186
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
@@ -0,0 +1,2 @@
+[no-transition-from-ua-to-blocking-stylesheet.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini b/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
index 037d7e0f951..ee625a151a4 100644
--- a/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-handleEvent.html.ini
@@ -4,3 +4,6 @@
 
   [throws if handleEvent is thruthy and not callable]
     expected: FAIL
+
+  [looks up handleEvent method on every event dispatch]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini b/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
index 314dca9c1f5..d52a3e77a70 100644
--- a/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
@@ -1,3 +1,6 @@
 [MediaQueryList-addListener-removeListener.html]
   [listeners are called when <iframe> is resized]
     expected: FAIL
+
+  [listeners are called correct number of times]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/css/cssom/getComputedStyle-pseudo.html.ini b/tests/wpt/meta-legacy-layout/css/cssom/getComputedStyle-pseudo.html.ini
index 4cc00139543..ddae768e94d 100644
--- a/tests/wpt/meta-legacy-layout/css/cssom/getComputedStyle-pseudo.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/cssom/getComputedStyle-pseudo.html.ini
@@ -58,3 +58,9 @@
 
   [Unknown pseudo-element with a known identifier: view-transition-new(name)]
     expected: PRECONDITION_FAILED
+
+  [Resolution of width is correct when pseudo-element argument is ignored (due to no colon)]
+    expected: FAIL
+
+  [Resolution of width is correct when pseudo-element argument is invalid (due to a trailing token)]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini b/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
index 49a1ab3fc0e..fcdec8d38e5 100644
--- a/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
+++ b/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
@@ -1,2 +1,24 @@
 [HTMLModElement.html]
-  expected: ERROR
+  [cite on ins use HTMLModElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on ins use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [dateTime on ins use HTMLModElement must enqueue an attributeChanged reaction when adding datetime content attribute]
+    expected: FAIL
+
+  [dateTime on ins use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [cite on del use HTMLModElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on del use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [dateTime on del use HTMLModElement must enqueue an attributeChanged reaction when adding datetime content attribute]
+    expected: FAIL
+
+  [dateTime on del use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini b/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
index bf855bdb2ca..34a31a796a8 100644
--- a/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
+++ b/tests/wpt/meta-legacy-layout/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
@@ -1,2 +1,6 @@
 [HTMLOptGroupElement.html]
-  expected: ERROR
+  [label on HTMLOptGroupElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [label on HTMLOptGroupElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/dom/events/webkit-transition-end-event.html.ini b/tests/wpt/meta-legacy-layout/dom/events/webkit-transition-end-event.html.ini
index b7fe8688a23..eb8b8d11dff 100644
--- a/tests/wpt/meta-legacy-layout/dom/events/webkit-transition-end-event.html.ini
+++ b/tests/wpt/meta-legacy-layout/dom/events/webkit-transition-end-event.html.ini
@@ -1,4 +1,5 @@
 [webkit-transition-end-event.html]
+  expected: TIMEOUT
   [dispatchEvent of an transitionend event does not trigger a prefixed event handler or listener]
     expected: FAIL
 
@@ -12,16 +13,25 @@
     expected: FAIL
 
   [event types for prefixed and unprefixed transitionend event listeners should be named appropriately]
-    expected: FAIL
+    expected: NOTRUN
 
   [ontransitionend and onwebkittransitionend are not aliases]
     expected: FAIL
 
   [webkitTransitionEnd event listener should trigger for an animation]
-    expected: FAIL
+    expected: TIMEOUT
 
   [dispatchEvent of a webkitTransitionEnd event does trigger a prefixed event handler or listener]
     expected: FAIL
 
   [onwebkittransitionend event handler should not trigger if an unprefixed event handler also exists]
     expected: FAIL
+
+  [webkitTransitionEnd event listener should not trigger if an unprefixed listener also exists]
+    expected: NOTRUN
+
+  [webkitTransitionEnd event listener should not trigger if an unprefixed event handler also exists]
+    expected: NOTRUN
+
+  [webkitTransitionEnd event listener is case sensitive]
+    expected: NOTRUN
diff --git a/tests/wpt/meta-legacy-layout/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/meta-legacy-layout/fetch/metadata/generated/css-images.sub.tentative.html.ini
index 53e4435fa09..f9de5391ad6 100644
--- a/tests/wpt/meta-legacy-layout/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -146,15 +146,3 @@
 
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
-
-  [background-image sec-fetch-site - Not sent to non-trustworthy same-origin destination]
-    expected: TIMEOUT
-
-  [border-image sec-fetch-site - Not sent to non-trustworthy cross-site destination]
-    expected: FAIL
-
-  [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/meta/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html.ini b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html.ini
similarity index 100%
rename from tests/wpt/meta/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html.ini
rename to tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html.ini
diff --git a/tests/wpt/meta/fetch/security/dangling-markup-mitigation.tentative.html.ini b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html.ini
similarity index 100%
rename from tests/wpt/meta/fetch/security/dangling-markup-mitigation.tentative.html.ini
rename to tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html.ini
diff --git a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/media.html.ini b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/media.html.ini
new file mode 100644
index 00000000000..320b53d711f
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/media.html.ini
@@ -0,0 +1,6 @@
+[media.html]
+  [Should not load audio with dangling markup in URL]
+    expected: FAIL
+
+  [Should not load video with dangling markup in URL]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/option.html.ini b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/option.html.ini
new file mode 100644
index 00000000000..7be7277c4ad
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/option.html.ini
@@ -0,0 +1,18 @@
+[option.html]
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <select name="dangling"><option>    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <select name="dangling"><option>    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <select name="dangling" form="form"><option>    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <select name="dangling"><option label="yay">    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <select name="dangling"><option label="yay">    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <select name="dangling" form="form"><option label="yay">    ]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/textarea.html.ini b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/textarea.html.ini
new file mode 100644
index 00000000000..747f187f85e
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup/textarea.html.ini
@@ -0,0 +1,9 @@
+[textarea.html]
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <textarea name="dangling">    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <textarea name="dangling">    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <textarea name="dangling" form="form">    ]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
index 5f9a07f92f0..dc1144214ef 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
@@ -4,3 +4,6 @@
 
   [Navigating to a different document with form submission]
     expected: FAIL
+
+  [Navigating to a different document with link click]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index 51fd557bd7f..149bcb4ff8c 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -7,3 +7,6 @@
 
   [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/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index f27acdd3b9d..78240a2f463 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -4,3 +4,15 @@
 
   [Test javascript URL string return values in direct and indirect (target) frame contexts. 9]
     expected: FAIL
+
+  [0041 set in href="" targeting a frame and clicked]
+    expected: FAIL
+
+  [0080 00FF set in href="" targeting a frame and clicked]
+    expected: FAIL
+
+  [0080 00FF 0100 set in href="" targeting a frame and clicked]
+    expected: FAIL
+
+  [D83D DE0D set in href="" targeting a frame and clicked]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
deleted file mode 100644
index 4ecd6d9f753..00000000000
--- a/tests/wpt/meta-legacy-layout/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/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini
deleted file mode 100644
index 49cc2e16746..00000000000
--- a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[navigation-unload-same-origin-fragment.html]
-  [Tests that a fragment navigation in the unload handler will not block the initial navigation]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
new file mode 100644
index 00000000000..7dc346632a4
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
@@ -0,0 +1,3 @@
+[navigation-unload-same-origin.window.html]
+  [Same-origin navigation started from unload handler must be ignored]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
similarity index 71%
rename from tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
rename to tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
index a03a8322165..5d17a8e9419 100644
--- a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
@@ -1,3 +1,3 @@
-[traverse_the_history_3.html]
+[traverse_the_history_2.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
deleted file mode 100644
index a03a8322165..00000000000
--- a/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[traverse_the_history_3.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
deleted file mode 100644
index 7a5fcb79165..00000000000
--- a/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[traverse_the_history_5.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/the-window-object/window-properties.https.html.ini b/tests/wpt/meta-legacy-layout/html/browsers/the-window-object/window-properties.https.html.ini
index 69f3fbc2be1..e9061d31d26 100644
--- a/tests/wpt/meta-legacy-layout/html/browsers/the-window-object/window-properties.https.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/browsers/the-window-object/window-properties.https.html.ini
@@ -37,3 +37,6 @@
 
   [Window replaceable attribute: screenTop]
     expected: FAIL
+
+  [Window attribute: onmove]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/canvas/element/manual/text/canvas.2d.disconnected.html.ini b/tests/wpt/meta-legacy-layout/html/canvas/element/manual/text/canvas.2d.disconnected.html.ini
index 5cdcce07c65..17247137cb1 100644
--- a/tests/wpt/meta-legacy-layout/html/canvas/element/manual/text/canvas.2d.disconnected.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/canvas/element/manual/text/canvas.2d.disconnected.html.ini
@@ -1,2 +1,2 @@
 [canvas.2d.disconnected.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini b/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
index 8b8af2b9c2e..2ef0896e3b3 100644
--- a/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
@@ -1,3 +1,4 @@
 [document-base-url-window-initiator-is-not-opener.https.window.html]
+  expected: TIMEOUT
   [window.open() gets base url from initiator not opener.]
     expected: [FAIL, PASS, TIMEOUT]
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 25d9964f057..2d3fbf0f308 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,4 +1,5 @@
 [iframe_sandbox_popups_escaping-1.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: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index f9138fb999a..6f7461b9472 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index f2378357bcc..76e34322dca 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/meta-legacy-layout/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: NOTRUN
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/text-plain.window.js.ini b/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/text-plain.window.js.ini
index eb09f8a4ada..3fb79e99bd7 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/text-plain.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/text-plain.window.js.ini
@@ -181,6 +181,3 @@
 
   [text/plain: \\r\\n in name (formdata event)]
     expected: FAIL
-
-  [text/plain: single quote in name (normal form)]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini b/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
index b5503bcb6d7..1ee60c7c306 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
@@ -179,8 +179,5 @@
   [application/x-www-form-urlencoded: double quote in filename (formdata event)]
     expected: FAIL
 
-  [application/x-www-form-urlencoded: Basic File test (formdata event)]
-    expected: FAIL
-
   [application/x-www-form-urlencoded: single quote in name (formdata event)]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
index 071b4378add..cc18f512574 100644
--- a/tests/wpt/meta-legacy-layout/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
@@ -11,3 +11,6 @@
 
   [Check that rel=noopener with target=_parent does a normal load]
     expected: FAIL
+
+  [Check that rel=noopener with target=_self does a normal load]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..b8bdf33cb65
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/syntax/parsing/DOMContentLoaded-defer.html.ini
@@ -0,0 +1,3 @@
+[DOMContentLoaded-defer.html]
+  [The end: DOMContentLoaded and defer scripts]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini b/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
deleted file mode 100644
index fc0233f5241..00000000000
--- a/tests/wpt/meta-legacy-layout/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/meta-legacy-layout/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
index 7237f5792de..dbe1def99e3 100644
--- a/tests/wpt/meta-legacy-layout/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/meta-legacy-layout/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry-different-function-realm.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Thenable resolution]
     expected: FAIL
@@ -13,4 +12,4 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/resource-timing/content-type-parsing.html.ini b/tests/wpt/meta-legacy-layout/resource-timing/content-type-parsing.html.ini
index 49b17a921b5..71ca4ed5411 100644
--- a/tests/wpt/meta-legacy-layout/resource-timing/content-type-parsing.html.ini
+++ b/tests/wpt/meta-legacy-layout/resource-timing/content-type-parsing.html.ini
@@ -94,10 +94,10 @@
     expected: FAIL
 
   [mime-type 16 : text/html;charset=\x0bgbk]
-    expected: TIMEOUT
+    expected: FAIL
 
   [mime-type 17 : text/html;charset=\x0cgbk]
-    expected: NOTRUN
+    expected: TIMEOUT
 
   [mime-type 18 : text/html;\x0bcharset=gbk]
     expected: NOTRUN
diff --git a/tests/wpt/meta-legacy-layout/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini b/tests/wpt/meta-legacy-layout/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
index 2dabc89a398..5cd220f3292 100644
--- a/tests/wpt/meta-legacy-layout/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/meta-legacy-layout/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@@ -943,3 +943,9 @@
 
   [X SNR (-7.45917280407153 dB) is not greater than or equal to 65.737. Got -7.45917280407153.]
     expected: FAIL
+
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[15073\]\t2.6916700000000000e+7\t6.4605611562728882e-1\t2.6916699353943884e+7\t4.1663098147146381e+7\t3.8985999999999999e-3\n\t[15074\]\t2.5936898589134216e-1\t5.9696805477142334e-1\t3.3759906888008118e-1\t5.6552283858697683e-1\t3.8985999999999999e-3\n\tMax AbsError of 2.6916699353943884e+7 at index of 15073.\n\tMax RelError of 4.1663098147146381e+7 at index of 15073.\n]
+    expected: FAIL
+
+  [X SNR (-105.16635012965943 dB) is not greater than or equal to 65.737. Got -105.16635012965943.]
+    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/webmessaging/with-ports/018.html.ini b/tests/wpt/meta-legacy-layout/webmessaging/with-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/webmessaging/with-ports/018.html.ini
@@ -0,0 +1,4 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/webmessaging/without-ports/017.html.ini b/tests/wpt/meta-legacy-layout/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/meta-legacy-layout/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/meta-legacy-layout/workers/baseurl/alpha/import-in-moduleworker.html.ini b/tests/wpt/meta-legacy-layout/workers/baseurl/alpha/import-in-moduleworker.html.ini
index 36d21059338..987e8a93681 100644
--- a/tests/wpt/meta-legacy-layout/workers/baseurl/alpha/import-in-moduleworker.html.ini
+++ b/tests/wpt/meta-legacy-layout/workers/baseurl/alpha/import-in-moduleworker.html.ini
@@ -1,3 +1,4 @@
 [import-in-moduleworker.html]
+  expected: ERROR
   [Base URL in module dedicated workers: import]
     expected: FAIL
diff --git a/tests/wpt/meta/MANIFEST.json b/tests/wpt/meta/MANIFEST.json
index 95fac131cbc..072df46e6d7 100644
--- a/tests/wpt/meta/MANIFEST.json
+++ b/tests/wpt/meta/MANIFEST.json
@@ -2191,6 +2191,13 @@
        ]
       ]
      },
+     "fieldset-first-line-crash.html": [
+      "096558db61b598007870d941f28edde609ae4246",
+      [
+       null,
+       {}
+      ]
+     ],
      "grid-definition": {
       "grid-add-item-with-positioned-items-crash.html": [
        "7b2ed99f223ed4333c265f242b3f043afd9232b6",
@@ -4638,6 +4645,13 @@
       ]
      ],
      "crashtests": {
+      "chrome-bug-1512988.html": [
+       "babe3ca704118e1b3441868cd26cbc405f4965cc",
+       [
+        null,
+        {}
+       ]
+      ],
       "orthogonal-percent-height-multicol-crash.html": [
        "aca93d23fc067ee64eb54f91fec5dbebb16d94d6",
        [
@@ -5932,16 +5946,16 @@
     },
     "canvas": {
      "element": {
-      "filters": {
-       "svg-filter-crash.html": [
-        "f64379c79241409ab55535596f4cbad894f45b42",
-        [
-         null,
-         {}
-        ]
-       ]
-      },
       "manual": {
+       "filters": {
+        "svg-filter-crash.html": [
+         "f64379c79241409ab55535596f4cbad894f45b42",
+         [
+          null,
+          {}
+         ]
+        ]
+       },
        "wide-gamut-canvas": {
         "imagedata-no-color-settings-crash.html": [
          "b21eaf72abec2fc9da5d9a48c9ef483a143ec830",
@@ -140892,7 +140906,7 @@
       ]
      ],
      "color-mix-currentcolor-background-repaint-parent.html": [
-      "eb0b979800baabe1895b1e6c0e09bbfd317ceb63",
+      "af894546942453cb50b30334a6a49ab3383d2418",
       [
        null,
        [
@@ -140905,7 +140919,7 @@
       ]
      ],
      "color-mix-currentcolor-background-repaint.html": [
-      "04578125cd55045dd525a7fca5fb6524f22e53ee",
+      "e584c4f9a838847e4f606c300ee31ef2677ec5a1",
       [
        null,
        [
@@ -140918,7 +140932,7 @@
       ]
      ],
      "color-mix-currentcolor-border-repaint-parent.html": [
-      "0e2c627532a02cd91c59c0b68be937c895c4a20b",
+      "a8d55ace8fce3e01e9c15e354342d298b627c07b",
       [
        null,
        [
@@ -140931,7 +140945,7 @@
       ]
      ],
      "color-mix-currentcolor-border-repaint.html": [
-      "f8ac80f5152eba5738b9f25b9bbdc6f0694b63ed",
+      "aeacd72d3d27d26a4cfca69c382c3565e2979971",
       [
        null,
        [
@@ -140944,7 +140958,7 @@
       ]
      ],
      "color-mix-currentcolor-outline-repaint-parent.html": [
-      "69d42c1808cd0435e8cceec5a848d0c348b75be5",
+      "e13880560637dd6483b58230d925d76084182505",
       [
        null,
        [
@@ -140957,7 +140971,7 @@
       ]
      ],
      "color-mix-currentcolor-outline-repaint.html": [
-      "764a1af93223b64f93c0e639366babec42ce818c",
+      "87f87b0edb7fe9aab0e32537cce90ebeb8f97262",
       [
        null,
        [
@@ -158369,6 +158383,19 @@
        {}
       ]
      ],
+     "at-supports-selector-webkit-slider-thumb.tentative.html": [
+      "3f777a7574a6d493c4d8a2fc2360c65cd1048ff4",
+      [
+       null,
+       [
+        [
+         "/css/css-conditional/at-supports-001-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "css-supports-001.xht": [
       "9221309d45fd637e613a1c11519a09fa105a4830",
       [
@@ -164211,7 +164238,7 @@
        ]
       ],
       "content-visibility-with-popover-top-layer-004.html": [
-       "24fef4f67e9d673a0b4098f760412bc01d993a95",
+       "bbf4567e37d4c1df68ce9119ec3952722324f12e",
        [
         null,
         [
@@ -164224,7 +164251,7 @@
        ]
       ],
       "content-visibility-with-popover-top-layer-005.html": [
-       "76b736a6379e2fc1f59223eb169ee363f4ab28e4",
+       "264d7b317e0a3fb2fc655c6cceda29d2fe252f9d",
        [
         null,
         [
@@ -164315,7 +164342,7 @@
        ]
       ],
       "content-visibility-with-top-layer-004.html": [
-       "218251fdcdb5731f808bd16c41e76a3b4cb8c42a",
+       "e21b11e92db1fe8e7684536d04371ae077c8e66a",
        [
         null,
         [
@@ -164328,7 +164355,7 @@
        ]
       ],
       "content-visibility-with-top-layer-005.html": [
-       "c1cb1bcde35e73f0fc33b54e6d2b30e71d330307",
+       "5283aea19734d1349622a249715c0a190d1ebad5",
        [
         null,
         [
@@ -220595,6 +220622,32 @@
        {}
       ]
      ],
+     "rounded-overflow-clip-visible.html": [
+      "65e7f055a3907da79701f1f8d68f6527d7c69181",
+      [
+       null,
+       [
+        [
+         "/css/css-overflow/rounded-overflow-clip-visible-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "rounded-overflow-visible-clip.html": [
+      "8bd727e1cfd6fd62674bdeb1fdf08af0b6b0b1c4",
+      [
+       null,
+       [
+        [
+         "/css/css-overflow/rounded-overflow-visible-clip-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "scrollable-overflow-input-001.html": [
       "1b58803079f8b60b68eb1c57a0c522962e0a8019",
       [
@@ -293102,6 +293155,19 @@
        }
       ]
      ],
+     "modify-style-via-cssom.html": [
+      "6f026607bc5c24eb8f3cf41166025da3d212cf85",
+      [
+       null,
+       [
+        [
+         "/css/css-view-transitions/modify-style-via-cssom-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "multiline-span-with-overflowing-text-and-box-decorations.html": [
       "e166b3c9dfe66370a4800ff6cac37e236100d62d",
       [
@@ -312614,6 +312680,19 @@
        {}
       ]
      ],
+     "svg-feimage-002.html": [
+      "b462ba91ad0b5847304e2a190ca0985aa8ace886",
+      [
+       null,
+       [
+        [
+         "/css/filter-effects/reference/svg-feimage-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "svg-feoffset-001.html": [
       "3d8118b387d938b588e8e88ad5ec87a5343e4f72",
       [
@@ -320168,6 +320247,34 @@
      }
     }
    },
+   "focus": {
+    "focus-large-element-in-overflow-hidden-container.html": [
+     "31d2a8bce9fd75ebd8862480c7a297868abd7c24",
+     [
+      null,
+      [
+       [
+        "/focus/focus-large-element-in-overflow-hidden-container-ref.html",
+        "=="
+       ]
+      ],
+      {}
+     ]
+    ],
+    "focus-visible-element-in-overflow-hidden-container.html": [
+     "22f5c3349d8c88c456d60fab2adcc0404d4ce05d",
+     [
+      null,
+      [
+       [
+        "/focus/focus-visible-element-in-overflow-hidden-container-ref.html",
+        "=="
+       ]
+      ],
+      {}
+     ]
+    ]
+   },
    "forced-colors-mode": {
     "backplate": {
      "forced-colors-mode-backplate-01.html": [
@@ -341776,6 +341883,19 @@
         {}
        ]
       ],
+      "use-encoding.svg": [
+       "e376fa18b776fac3af12cd159de0307cb1ac5f6d",
+       [
+        null,
+        [
+         [
+          "/svg/struct/reftests/reference/green-100x100.svg",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "use-external-resource-with-revalidation.tentative.html": [
        "d899165fa9ccef15d893b599ec6a8f4e005bcb36",
        [
@@ -346115,7 +346235,7 @@
     []
    ],
    ".taskcluster.yml": [
-    "d9e5581861ee278401e9037fe11773c15f207993",
+    "53518a9498a7cd3dafcc6f0a0ca5b952c0fd9330",
     []
    ],
    ".well-known": {
@@ -394308,11 +394428,11 @@
        []
       ],
       "spacer-with-popover-top-layer-ref.html": [
-       "5ae45afe9ebe7f47c72edeb259db92f4058fe60d",
+       "6c4c65f58c32679f7396cf6cf9ae094b32546c23",
        []
       ],
       "spacer-with-top-layer-ref.html": [
-       "7cf1f1581b7710b32d8072fc9128ab9169d090da",
+       "b5cb1f108e5229c69645702f878c43dde37512bb",
        []
       ]
      },
@@ -396283,7 +396403,7 @@
     },
     "css-flexbox": {
      "META.yml": [
-      "0bcad0b51f759e6ea9a05e2fee919677bc790dd3",
+      "503fc08f57614916ba42660b1dbf5acbe0f267ee",
       []
      ],
      "abspos": {
@@ -406003,7 +406123,7 @@
     },
     "css-grid": {
      "META.yml": [
-      "e49946f4f7012e2aefbc2fb01573a2e01a903e55",
+      "55f9d72fa50fc5b9378511c74b84873da740b15b",
       []
      ],
      "README.md": [
@@ -411960,6 +412080,14 @@
        []
       ]
      },
+     "rounded-overflow-clip-visible-ref.html": [
+      "3a25b794d8d4136c2a7c8c94e5d9eb80daceedc7",
+      []
+     ],
+     "rounded-overflow-visible-clip-ref.html": [
+      "a97633ed3bd7c094d06743534789226165ca8a05",
+      []
+     ],
      "scrollable-overflow-input-001-ref.html": [
       "151843a72c00616dfb7ad723be6b1d3435cde65b",
       []
@@ -422611,7 +422739,7 @@
     },
     "css-ui": {
      "META.yml": [
-      "7ce4b54a22c78576dc2318ebd651dfd1cce374ad",
+      "81011208b5f9813225354369c533174728fd500e",
       []
      ],
      "README.md": [
@@ -424816,6 +424944,10 @@
       "1df26bb375248b014906c54efb426f2cf4bf9035",
       []
      ],
+     "modify-style-via-cssom-ref.html": [
+      "dd93e0b498c3650812eb126fb6d7422a715a474f",
+      []
+     ],
      "multiline-span-with-overflowing-text-and-box-decorations-ref.html": [
       "ca9efc52d6e412d2eb2ee3511b5f3845a36854b8",
       []
@@ -436086,6 +436218,14 @@
      }
     },
     "security": {
+     "dangling-markup": {
+      "resources": {
+       "helper.js": [
+        "100bcba7b5184a12955c6c99ce21c483301ef446",
+        []
+       ]
+      }
+     },
      "support": {
       "embedded-credential-window.sub.html": [
        "20d307e9188405dcec011042487aa2c7354930bf",
@@ -436221,6 +436361,14 @@
     }
    },
    "focus": {
+    "focus-large-element-in-overflow-hidden-container-ref.html": [
+     "856f7940b60aca9f924bfa85b61a55c188428aee",
+     []
+    ],
+    "focus-visible-element-in-overflow-hidden-container-ref.html": [
+     "d9c41abb6595ff57b26e019953c8c1da8483e6fe",
+     []
+    ],
     "support": {
      "activeelement-after-calling-window-focus-inner.html": [
       "1fa14d4b8a24de267e2ffa0b37bdeefc78c00562",
@@ -470832,11 +470980,11 @@
      []
     ],
     "requirements_mypy.txt": [
-     "af20e5a9a7698689b470db18fc4fef843bc532b1",
+     "c3db2292af599ad62a749c6d7baa3fd75136e48e",
      []
     ],
     "requirements_pytest.txt": [
-     "93ec70d7e6115f59c11d0d956bdb822346895c54",
+     "9034cda71908a5d6f2744b122b001d8a037459e0",
      []
     ],
     "requirements_tests.txt": [
@@ -480577,7 +480725,7 @@
       []
      ],
      "virtualenv.py": [
-      "742f572c34a59d031fa36b7d7155af5b44fcf19c",
+      "f1fad7327013d8de1036a7589762f2fdb99b8cfc",
       []
      ],
      "wpt.py": [
@@ -480799,7 +480947,7 @@
         []
        ],
        "base.py": [
-        "7ef9c9b54cb4180b4ae91c5ff0e631eba6380559",
+        "7abb1660bae88841967e974c6934e4406bf5cee1",
         []
        ],
        "executorchrome.py": [
@@ -483970,7 +484118,7 @@
      []
     ],
     "helpers.js": [
-     "56d941a3ed89382eb4d6a863444a9d57c5edccfe",
+     "5b30749bf377ca03aaa791b3a815033f9460cbda",
      []
     ],
     "resources": {
@@ -484142,7 +484290,7 @@
      []
     ],
     "video-encoder-utils.js": [
-     "855531a76a6e3bedb263b0931e0160ceedda6552",
+     "0838260d31bc8f90d2d294341f078bef544d29bd",
      []
     ],
     "videoFrame-construction.crossOriginIsolated.https.any.js.headers": [
@@ -485074,7 +485222,7 @@
        []
       ],
       "fixtures.py": [
-       "d7ca4d0fab7f593e773a5014dd00edf8eab85dc4",
+       "7468e8b251f8f6f6e203d2a314f9480e397940e2",
        []
       ],
       "fixtures_bidi.py": [
@@ -485086,7 +485234,7 @@
        []
       ],
       "helpers.py": [
-       "dbc5abc2475cf53c4d24add726a12a2ff47175c5",
+       "0a8e1dc1a4f1d15873db3bc6663bcd1a64ebef40",
        []
       ],
       "html": {
@@ -527978,7 +528126,7 @@
       ]
      ],
      "computed-style-animation-parsing.html": [
-      "15a1665be5ee13c66c434f6da48af42ac622baff",
+      "db51106fa8d83c73cfb57e0515e90340a6fb3f6f",
       [
        null,
        {}
@@ -528095,7 +528243,7 @@
        ]
       ],
       "animation-computed.html": [
-       "f8d34b889ba19dfc7d9fd4d644da499b979d4166",
+       "2a70585aadcd148889a9d27ddd97be01968e951f",
        [
         null,
         {}
@@ -530570,7 +530718,7 @@
       ]
      ],
      "scope-nesting.html": [
-      "44e5b7536aed6c3e33cbdf32640270f55cbcac83",
+      "d299ba30370516a526ff96c971c9d459589f5514",
       [
        null,
        {}
@@ -541752,7 +541900,7 @@
        ]
       ],
       "clip-path-computed.html": [
-       "8ec27a1472eac7cd5e0b4420a96f0b1c7ccfc793",
+       "481c1140b4d0c7564c89cf04d25b9228e5af9d86",
        [
         null,
         {}
@@ -545283,6 +545431,13 @@
        {}
       ]
      ],
+     "focused-element-nested-anchor.html": [
+      "727da4046e69c926da7cb74c7a74bd5600f3599b",
+      [
+       null,
+       {}
+      ]
+     ],
      "focused-element-outside-scroller.html": [
       "73a5944856b19ff55219e446299513d0d65d589e",
       [
@@ -559552,7 +559707,7 @@
       ]
      ],
      "getComputedStyle-pseudo.html": [
-      "35c5efe3fa83bd800e29714f3bc84ab3ded3244e",
+      "c07347a1973cf2fa9105907bbdd0015081bed417",
       [
        null,
        {}
@@ -563366,6 +563521,13 @@
       ]
      ],
      "parsing": {
+      "invalid-pseudos.html": [
+       "a09572b6517a4e50b2babadcba90c15b49aa8191",
+       [
+        null,
+        {}
+       ]
+      ],
       "parse-anplusb.html": [
        "b7cfd293515b67d5aa66bfe7b62262e1b64c0942",
        [
@@ -564386,7 +564548,7 @@
        ]
       ],
       "HTMLModElement.html": [
-       "850fe170a50d21c1a5cb5a042f05bd2fb062d3fd",
+       "cfdbba446477ff0f34cf3071493db0eda3e6e000",
        [
         null,
         {}
@@ -564400,7 +564562,7 @@
        ]
       ],
       "HTMLOptGroupElement.html": [
-       "afa31bb465f33debae79cbc0cbef4de0db382680",
+       "ca34e81e3bbd78747a1c134e5b76ebe0cd24b288",
        [
         null,
         {}
@@ -603094,20 +603256,43 @@
        {}
       ]
      ],
-     "dangling-markup-mitigation-data-url.tentative.sub.html": [
-      "f27735daa1dd650726525d72a48b91d58d62535b",
-      [
-       null,
-       {}
+     "dangling-markup": {
+      "dangling-markup-mitigation-data-url.tentative.sub.html": [
+       "f27735daa1dd650726525d72a48b91d58d62535b",
+       [
+        null,
+        {}
+       ]
+      ],
+      "dangling-markup-mitigation.tentative.html": [
+       "61a931608ba5f3dc7f53f3f7a14ef5111737b07d",
+       [
+        null,
+        {}
+       ]
+      ],
+      "media.html": [
+       "2649edcf32008566c8d05352d42057fdedd4fa39",
+       [
+        null,
+        {}
+       ]
+      ],
+      "option.html": [
+       "f528bed999b4edb969948122bc3a64ab6429bfd7",
+       [
+        null,
+        {}
+       ]
+      ],
+      "textarea.html": [
+       "c4b334edc99e867a393d9d1660ec3fea5c3cb84a",
+       [
+        null,
+        {}
+       ]
       ]
-     ],
-     "dangling-markup-mitigation.tentative.html": [
-      "61a931608ba5f3dc7f53f3f7a14ef5111737b07d",
-      [
-       null,
-       {}
-      ]
-     ],
+     },
      "embedded-credentials.tentative.sub.html": [
       "ca5ee1c87bd7c6764783c9c12a0fd8dd3d839a8e",
       [
@@ -620032,7 +620217,7 @@
        ]
       ],
       "window-properties.https.html": [
-       "c61fb04ae24ab8ec4c9c385dc99e25f35891b756",
+       "2fb408cdc9967ddc069e6686833cd74f04afba10",
        [
         null,
         {}
@@ -669109,6 +669294,15 @@
          {}
         ]
        ],
+       "event-handler-onmove.html": [
+        "e4454a20a15fa2ae20d4caf1574f0b97be7dbc45",
+        [
+         null,
+         {
+          "testdriver": true
+         }
+        ]
+       ],
        "event-handler-onresize.html": [
         "0e44e7272f02513c6de0c5aecc96f09005ad7396",
         [
@@ -688210,7 +688404,7 @@
      ]
     ],
     "permissions-policy-frame-policy-allowed-for-self.https.sub.html": [
-     "1aa219bffe8883f19a57314f2c54b0fc4f0df04d",
+     "563b7a80ebeb138680dff508d8cb0e0f2d6f79d1",
      [
       null,
       {
@@ -688228,7 +688422,7 @@
      ]
     ],
     "permissions-policy-frame-policy-allowed-for-some.https.sub.html": [
-     "a27018e98f16589151e368fe922edcbc3475ea6d",
+     "4515679c184aa7cc3e4b5caafee306f653ba626d",
      [
       null,
       {
@@ -688237,7 +688431,7 @@
      ]
     ],
     "permissions-policy-frame-policy-disallowed-for-all.https.sub.html": [
-     "e7869b1ea1a25309f47fadc01c9732fb3e77d8a9",
+     "8d5c3f43f439ca633234bcc873750c1ac0cea6a5",
      [
       null,
       {
@@ -743927,8 +744121,34 @@
       }
      ]
     ],
+    "public-key-credential-creation-options-from-json.https.window.js": [
+     "c0f1a08cf903b8b0f504df08e56be00c3a1e3248",
+     [
+      "webauthn/public-key-credential-creation-options-from-json.https.window.html",
+      {
+       "script_metadata": [
+        [
+         "script",
+         "/resources/testdriver.js"
+        ],
+        [
+         "script",
+         "/resources/testdriver-vendor.js"
+        ],
+        [
+         "script",
+         "/resources/utils.js"
+        ],
+        [
+         "script",
+         "helpers.js"
+        ]
+       ]
+      }
+     ]
+    ],
     "public-key-credential-to-json.https.window.js": [
-     "1fbd4341cc597eb1f0a5140a5fd8f608056fb255",
+     "8ef25132197dda690d7ad36f63307f4a4f8ef7f1",
      [
       "webauthn/public-key-credential-to-json.https.window.html",
       {
@@ -745818,7 +746038,7 @@
      ]
     ],
     "per-frame-qp-encoding.https.any.js": [
-     "81cc6c27d4ff4045fdae6399b549eac2f02f6436",
+     "8ec96c3f7035d4d02953dea5a2185fe63844df9a",
      [
       "webcodecs/per-frame-qp-encoding.https.any.html?av1",
       {
@@ -800588,12 +800808,10 @@
          ]
         ],
         "invalid.py": [
-         "2a90af4da0b1b6e63b5cb01d4e9f013e287a8fe1",
+         "744bc0f7f79f86722fbf2f05bb8475c6cdfc9e23",
          [
           null,
-          {
-           "timeout": "long"
-          }
+          {}
          ]
         ],
         "viewport.py": [
@@ -800658,12 +800876,10 @@
       "input": {
        "perform_actions": {
         "invalid.py": [
-         "f1e8c3c441a51a7bab58e0f9962f5548f11f6eb4",
+         "4ae3039f473e16ebe6350196822e8e5e7a4c00e3",
          [
           null,
-          {
-           "timeout": "long"
-          }
+          {}
          ]
         ],
         "key.py": [
@@ -801110,12 +801326,10 @@
          ]
         ],
         "invalid.py": [
-         "9de343955c8a260203f0a0beee962e0aa2ddaaf6",
+         "af94e86efe10c3e353f952111a3054d9d7525cff",
          [
           null,
-          {
-           "timeout": "long"
-          }
+          {}
          ]
         ],
         "invalid_tentative.py": [
@@ -801624,12 +801838,10 @@
       },
       "element_clear": {
        "clear.py": [
-        "22c07b6a8ce241a7166511c539765f1cd959edcb",
+        "9a0549ce4f25e17170b2a45ea1e89926c88dcb36",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "user_prompts.py": [
@@ -802066,7 +802278,7 @@
         ]
        ],
        "stress.py": [
-        "b907a31f17e0167ff27a4e8ceb2ad44cd372b537",
+        "cbc5e28c903ed140d8a99d703be2b355e03536ae",
         [
          null,
          {
@@ -802458,7 +802670,7 @@
       },
       "maximize_window": {
        "maximize.py": [
-        "3cbd47043f5db726f8df04cc41fc51dacbc6120c",
+        "3a20a0d5589bd222c17530ad650311555d71ded9",
         [
          null,
          {
@@ -802467,7 +802679,7 @@
         ]
        ],
        "stress.py": [
-        "986f6346e908d9cde7c66daa1069ab4920ac76b3",
+        "23f048e846b7b60f52d1f5424e4e7538c4538f4c",
         [
          null,
          {
@@ -802487,7 +802699,7 @@
       },
       "minimize_window": {
        "minimize.py": [
-        "ed02280a135f2b436bdef250d3511d5432efeea1",
+        "2ad5333ec54a79fd8306c17f093046a87b5aaf25",
         [
          null,
          {
@@ -802496,7 +802708,7 @@
         ]
        ],
        "stress.py": [
-        "8990f12669d70aa9693d798c6d75105c6075c3d6",
+        "f9c8304bdc00a01481877de0452bb2d7f72448ac",
         [
          null,
          {
@@ -802658,12 +802870,10 @@
       },
       "perform_actions": {
        "invalid.py": [
-        "b0302131a0ac28b9c704806deaf4585f39919126",
+        "f000477376e7ccded56168f2e9f3d373cbd675aa",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "key.py": [
@@ -802739,12 +802949,10 @@
         ]
        ],
        "pointer_mouse.py": [
-        "914e9f65608cd66ebbcd439a5b933ed3e03c5006",
+        "f8683ce45156c7d79c49753eca04c55ffc2b4f16",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "pointer_origin.py": [
@@ -802762,21 +802970,17 @@
         ]
        ],
        "pointer_pen.py": [
-        "b846f7e7ed59350cbb72f7faa3746cc7742d4664",
+        "bf71a20c4d2ce89ffc40c4338deaefb5a4f41ddd",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "pointer_touch.py": [
-        "ab49f1eed6d117a1b913e47763d6bf348429e6d8",
+        "b85b2e6ef38195d26e0e580edf34a141efc19eba",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "pointer_tripleclick.py": [
@@ -802787,12 +802991,10 @@
         ]
        ],
        "sequence.py": [
-        "f6c12220c450146a7a491b0fa9172264114debdc",
+        "7751762768c7aa4f6a9388318b881b5a302a165f",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ],
        "user_prompts.py": [
@@ -802882,12 +803084,10 @@
         ]
        ],
        "sequence.py": [
-        "65ad39fcbf788f4d1f0a9a032f161f8dc74875d8",
+        "348f81694605a38990f0309100ca610e9683e68b",
         [
          null,
-         {
-          "timeout": "long"
-         }
+         {}
         ]
        ]
       },
@@ -802920,7 +803120,7 @@
       },
       "set_window_rect": {
        "set.py": [
-        "af37c2f70d32c30f2aed2f88883c70249ba96865",
+        "5295c44fddb5d8503b2c6a743080f53c7724441b",
         [
          null,
          {
diff --git a/tests/wpt/meta/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini b/tests/wpt/meta/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
index 5496474410b..a647125277a 100644
--- a/tests/wpt/meta/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
+++ b/tests/wpt/meta/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
@@ -1,2 +1,2 @@
 [mix-blend-mode-animation.html]
-  expected: FAIL
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-animations/computed-style-animation-parsing.html.ini b/tests/wpt/meta/css/css-animations/computed-style-animation-parsing.html.ini
index a19ee452ecd..49e2a9a3d47 100644
--- a/tests/wpt/meta/css/css-animations/computed-style-animation-parsing.html.ini
+++ b/tests/wpt/meta/css/css-animations/computed-style-animation-parsing.html.ini
@@ -10,3 +10,9 @@
 
   [Test an animation name that is the same as a possible animation direction.]
     expected: FAIL
+
+  [Test an animation name that is the same as a possible animation timing-function.]
+    expected: FAIL
+
+  [Test an animation name that is the same as a possible animation iteration-count.]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-animations/parsing/animation-computed.html.ini b/tests/wpt/meta/css/css-animations/parsing/animation-computed.html.ini
index b8971a977db..0daa0527645 100644
--- a/tests/wpt/meta/css/css-animations/parsing/animation-computed.html.ini
+++ b/tests/wpt/meta/css/css-animations/parsing/animation-computed.html.ini
@@ -34,3 +34,12 @@
 
   [Default animation value]
     expected: FAIL
+
+  [Property animation value 'ease-in-out']
+    expected: FAIL
+
+  [Property animation value 'none, none']
+    expected: FAIL
+
+  [Animation with a delay but no duration]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini
new file mode 100644
index 00000000000..f43930d9270
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-background-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini
new file mode 100644
index 00000000000..7f9a0e4a2e6
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-background-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-background-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini
new file mode 100644
index 00000000000..512f62ceace
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-border-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini
new file mode 100644
index 00000000000..18def32156c
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-border-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-border-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini
new file mode 100644
index 00000000000..61d2d858d76
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-outline-repaint-parent.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini
new file mode 100644
index 00000000000..6804635b254
--- /dev/null
+++ b/tests/wpt/meta/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html.ini
@@ -0,0 +1,2 @@
+[color-mix-currentcolor-outline-repaint.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini b/tests/wpt/meta/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini
new file mode 100644
index 00000000000..89e7216c9d1
--- /dev/null
+++ b/tests/wpt/meta/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html.ini
@@ -0,0 +1,2 @@
+[at-supports-selector-webkit-slider-thumb.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-fonts/variations/at-font-face-font-matching.html.ini b/tests/wpt/meta/css/css-fonts/variations/at-font-face-font-matching.html.ini
index a29e2657d89..00fd6dba908 100644
--- a/tests/wpt/meta/css/css-fonts/variations/at-font-face-font-matching.html.ini
+++ b/tests/wpt/meta/css/css-fonts/variations/at-font-face-font-matching.html.ini
@@ -137,15 +137,9 @@
   [Matching font-style: 'oblique -21deg' should prefer 'oblique 0deg' over 'oblique 30deg 60deg']
     expected: FAIL
 
-  [Matching font-style: 'oblique -20deg' should prefer 'oblique 0deg' over 'oblique 30deg 60deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique -21deg' should prefer 'oblique 30deg 60deg' over 'oblique 40deg 50deg']
     expected: FAIL
 
-  [Matching font-weight: '430' should prefer '420 440' over '450 460']
-    expected: FAIL
-
   [Matching font-weight: '430' should prefer '450 460' over '500']
     expected: FAIL
 
@@ -164,9 +158,6 @@
   [Matching font-style: 'italic' should prefer 'oblique 0deg' over 'oblique -60deg -30deg']
     expected: FAIL
 
-  [Matching font-style: 'oblique 21deg' should prefer 'oblique 40deg 50deg' over 'oblique 20deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 10deg' should prefer 'italic' over 'oblique 0deg']
     expected: FAIL
 
@@ -185,9 +176,6 @@
   [Matching font-style: 'oblique -21deg' should prefer 'oblique -10deg' over 'italic']
     expected: FAIL
 
-  [Matching font-weight: '430' should prefer '350 399' over '340 398']
-    expected: FAIL
-
   [Matching font-weight: '501' should prefer '450 460' over '390 410']
     expected: FAIL
 
@@ -245,12 +233,6 @@
   [Matching font-stretch: '100%' should prefer '110% 120%' over '115% 116%']
     expected: FAIL
 
-  [Matching font-stretch: '90%' should prefer '60% 70%' over '110% 140%']
-    expected: FAIL
-
-  [Matching font-style: 'italic' should prefer 'normal' over 'oblique 0deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 21deg' should prefer 'oblique 10deg' over 'italic']
     expected: FAIL
 
@@ -296,9 +278,6 @@
   [Matching font-style: 'oblique 10deg' should prefer 'oblique 0deg' over 'oblique -50deg -20deg']
     expected: FAIL
 
-  [Matching font-style: 'oblique 0deg' should prefer 'oblique 5deg' over 'oblique 15deg 20deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique -21deg' should prefer 'oblique -21deg' over 'oblique -60deg -40deg']
     expected: FAIL
 
@@ -308,9 +287,6 @@
   [Matching font-style: 'oblique 20deg' should prefer 'oblique 20deg' over 'oblique 30deg 60deg']
     expected: FAIL
 
-  [Matching font-style: 'oblique 20deg' should prefer 'oblique 40deg 50deg' over 'oblique 10deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 20deg' should prefer 'oblique -50deg -20deg' over 'oblique -40deg -30deg']
     expected: FAIL
 
diff --git a/tests/wpt/meta/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini b/tests/wpt/meta/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
new file mode 100644
index 00000000000..e35a452a186
--- /dev/null
+++ b/tests/wpt/meta/css/css-transitions/render-blocking/no-transition-from-ua-to-blocking-stylesheet.html.ini
@@ -0,0 +1,2 @@
+[no-transition-from-ua-to-blocking-stylesheet.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini b/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
index 17ed41817d2..9491cc6f9ac 100644
--- a/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
+++ b/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
@@ -52,3 +52,6 @@
 
   [Unknown pseudo-element with a known identifier: view-transition-new(name)]
     expected: PRECONDITION_FAILED
+
+  [Resolution of width is correct when pseudo-element argument is invalid (due to a trailing token)]
+    expected: FAIL
diff --git a/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini b/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
index 49a1ab3fc0e..fcdec8d38e5 100644
--- a/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
+++ b/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLModElement.html.ini
@@ -1,2 +1,24 @@
 [HTMLModElement.html]
-  expected: ERROR
+  [cite on ins use HTMLModElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on ins use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [dateTime on ins use HTMLModElement must enqueue an attributeChanged reaction when adding datetime content attribute]
+    expected: FAIL
+
+  [dateTime on ins use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [cite on del use HTMLModElement must enqueue an attributeChanged reaction when adding cite content attribute]
+    expected: FAIL
+
+  [cite on del use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
+
+  [dateTime on del use HTMLModElement must enqueue an attributeChanged reaction when adding datetime content attribute]
+    expected: FAIL
+
+  [dateTime on del use HTMLModElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
diff --git a/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini b/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
index bf855bdb2ca..34a31a796a8 100644
--- a/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
+++ b/tests/wpt/meta/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html.ini
@@ -1,2 +1,6 @@
 [HTMLOptGroupElement.html]
-  expected: ERROR
+  [label on HTMLOptGroupElement must enqueue an attributeChanged reaction when adding a new attribute]
+    expected: FAIL
+
+  [label on HTMLOptGroupElement must enqueue an attributeChanged reaction when replacing an existing attribute]
+    expected: FAIL
diff --git a/tests/wpt/meta/dom/events/webkit-transition-end-event.html.ini b/tests/wpt/meta/dom/events/webkit-transition-end-event.html.ini
index b7fe8688a23..eb8b8d11dff 100644
--- a/tests/wpt/meta/dom/events/webkit-transition-end-event.html.ini
+++ b/tests/wpt/meta/dom/events/webkit-transition-end-event.html.ini
@@ -1,4 +1,5 @@
 [webkit-transition-end-event.html]
+  expected: TIMEOUT
   [dispatchEvent of an transitionend event does not trigger a prefixed event handler or listener]
     expected: FAIL
 
@@ -12,16 +13,25 @@
     expected: FAIL
 
   [event types for prefixed and unprefixed transitionend event listeners should be named appropriately]
-    expected: FAIL
+    expected: NOTRUN
 
   [ontransitionend and onwebkittransitionend are not aliases]
     expected: FAIL
 
   [webkitTransitionEnd event listener should trigger for an animation]
-    expected: FAIL
+    expected: TIMEOUT
 
   [dispatchEvent of a webkitTransitionEnd event does trigger a prefixed event handler or listener]
     expected: FAIL
 
   [onwebkittransitionend event handler should not trigger if an unprefixed event handler also exists]
     expected: FAIL
+
+  [webkitTransitionEnd event listener should not trigger if an unprefixed listener also exists]
+    expected: NOTRUN
+
+  [webkitTransitionEnd event listener should not trigger if an unprefixed event handler also exists]
+    expected: NOTRUN
+
+  [webkitTransitionEnd event listener is case sensitive]
+    expected: NOTRUN
diff --git a/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
index 4b5c3e26586..7b4cf2c5ae7 100644
--- a/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/meta/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -185,3 +185,6 @@
 
   [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
     expected: FAIL
+
+  [background-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/fetch/metadata/generated/element-img-environment-change.sub.html.ini b/tests/wpt/meta/fetch/metadata/generated/element-img-environment-change.sub.html.ini
index 4648085f98d..410ec4c1d39 100644
--- a/tests/wpt/meta/fetch/metadata/generated/element-img-environment-change.sub.html.ini
+++ b/tests/wpt/meta/fetch/metadata/generated/element-img-environment-change.sub.html.ini
@@ -41,6 +41,3 @@
 
   [sec-fetch-site - HTTPS downgrade-upgrade, no attributes]
     expected: NOTRUN
-
-  [sec-fetch-site - Not sent to non-trustworthy same-origin destination, no attributes]
-    expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html.ini b/tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html.ini
similarity index 86%
rename from tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html.ini
rename to tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html.ini
index 50b0e990179..5af5dc2813d 100644
--- a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html.ini
+++ b/tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html.ini
@@ -1,11 +1,7 @@
 [dangling-markup-mitigation-data-url.tentative.sub.html]
-  type: testharness
   [<img id="dangling" src="data:image/svg+xml;utf8,\\n      <svg width='1' height='1' xmlns='http://www.w3.org/2000/svg'>\\n        <rect width='100%' height='100%' fill='rebeccapurple'/>\\n        <rect x='10%' y='10%' width='80%' height='80%' fill='lightgreen'/>\\n      </svg>">]
     expected: FAIL
 
-  [<iframe id="dangling"\\n        src="data:text/html,\\n            <img\\n              onload='window.parent.postMessage(&quot;loaded&quot;, &quot;*&quot;);'\\n              onerror='window.parent.postMessage(&quot;error&quot;, &quot;*&quot;);'\\n              src='http://web-platform.test:8000/images/green-256x256.png?&amp;amp;#10;&lt;'>\\n        ">\\n     </iframe>]
-    expected: TIMEOUT
-
   [<iframe id="dangling"\\n        src="data:text/html,\\n            <img\\n              onload='window.parent.postMessage(&quot;loaded&quot;, &quot;*&quot;);'\\n              onerror='window.parent.postMessage(&quot;error&quot;, &quot;*&quot;);'\\n              src='http://web-platform.test:8000/images/gr&#10;een-256x256.png?&lt;'>\\n        ">\\n     </iframe>]
     expected: FAIL
 
@@ -23,4 +19,3 @@
 
   [<iframe id="dangling"\\n        src="\\rdata:text/html,\\n            <img\\n              onload='window.parent.postMessage(&quot;loaded&quot;, &quot;*&quot;);'\\n              onerror='window.parent.postMessage(&quot;error&quot;, &quot;*&quot;);'\\n              src='http://web-platform.test:8000/images/gr&#10;een-256x256.png?&lt;'>\\n        ">\\n     </iframe>]
     expected: FAIL
-
diff --git a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation.tentative.html.ini b/tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html.ini
similarity index 97%
rename from tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation.tentative.html.ini
rename to tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html.ini
index bb3b1f4f399..3b0a8472abf 100644
--- a/tests/wpt/meta-legacy-layout/fetch/security/dangling-markup-mitigation.tentative.html.ini
+++ b/tests/wpt/meta/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html.ini
@@ -1,5 +1,4 @@
 [dangling-markup-mitigation.tentative.html]
-  type: testharness
   [Fetch: /images/gre\\nen-1x1.png?img=<]
     expected: FAIL
 
diff --git a/tests/wpt/meta/fetch/security/dangling-markup/media.html.ini b/tests/wpt/meta/fetch/security/dangling-markup/media.html.ini
new file mode 100644
index 00000000000..320b53d711f
--- /dev/null
+++ b/tests/wpt/meta/fetch/security/dangling-markup/media.html.ini
@@ -0,0 +1,6 @@
+[media.html]
+  [Should not load audio with dangling markup in URL]
+    expected: FAIL
+
+  [Should not load video with dangling markup in URL]
+    expected: FAIL
diff --git a/tests/wpt/meta/fetch/security/dangling-markup/option.html.ini b/tests/wpt/meta/fetch/security/dangling-markup/option.html.ini
new file mode 100644
index 00000000000..7be7277c4ad
--- /dev/null
+++ b/tests/wpt/meta/fetch/security/dangling-markup/option.html.ini
@@ -0,0 +1,18 @@
+[option.html]
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <select name="dangling"><option>    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <select name="dangling"><option>    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <select name="dangling" form="form"><option>    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <select name="dangling"><option label="yay">    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <select name="dangling"><option label="yay">    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <select name="dangling" form="form"><option label="yay">    ]
+    expected: FAIL
diff --git a/tests/wpt/meta/fetch/security/dangling-markup/textarea.html.ini b/tests/wpt/meta/fetch/security/dangling-markup/textarea.html.ini
new file mode 100644
index 00000000000..747f187f85e
--- /dev/null
+++ b/tests/wpt/meta/fetch/security/dangling-markup/textarea.html.ini
@@ -0,0 +1,9 @@
+[textarea.html]
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post">        <input type="submit">        <textarea name="dangling">    ]
+    expected: FAIL
+
+  [      <div>        <form action="/resource-timing/resources/document-navigated.html" method="post">          <input type="submit">          <textarea name="dangling">    ]
+    expected: FAIL
+
+  [      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">        <input type="submit">      </form>      <textarea name="dangling" form="form">    ]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index c2a30741798..51fd557bd7f 100644
--- a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -5,8 +5,5 @@
   [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
-
   [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank#foo']
     expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
index 5aef7ce66ce..324db3d9b35 100644
--- a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/meta/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/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 5031c9a6429..f27acdd3b9d 100644
--- a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -4,6 +4,3 @@
 
   [Test javascript URL string return values in direct and indirect (target) frame contexts. 9]
     expected: FAIL
-
-  [0041 set in href="" targeting a frame and clicked]
-    expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
new file mode 100644
index 00000000000..7dc346632a4
--- /dev/null
+++ b/tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
@@ -0,0 +1,3 @@
+[navigation-unload-same-origin.window.html]
+  [Same-origin navigation started from unload handler must be ignored]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
similarity index 71%
rename from tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
rename to tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
index 7a5fcb79165..5d17a8e9419 100644
--- a/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ b/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
@@ -1,3 +1,3 @@
-[traverse_the_history_5.html]
+[traverse_the_history_2.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini b/tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
similarity index 100%
rename from tests/wpt/meta-legacy-layout/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
rename to tests/wpt/meta/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
diff --git a/tests/wpt/meta-legacy-layout/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini b/tests/wpt/meta/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
similarity index 100%
rename from tests/wpt/meta-legacy-layout/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
rename to tests/wpt/meta/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
diff --git a/tests/wpt/meta/html/browsers/the-window-object/window-properties.https.html.ini b/tests/wpt/meta/html/browsers/the-window-object/window-properties.https.html.ini
index 2030e26bdf3..4a12d71e70c 100644
--- a/tests/wpt/meta/html/browsers/the-window-object/window-properties.https.html.ini
+++ b/tests/wpt/meta/html/browsers/the-window-object/window-properties.https.html.ini
@@ -40,3 +40,6 @@
 
   [Window method: createImageBitmap]
     expected: FAIL
+
+  [Window attribute: onmove]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini b/tests/wpt/meta/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
index 8b8af2b9c2e..2ef0896e3b3 100644
--- a/tests/wpt/meta/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
+++ b/tests/wpt/meta/html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.js.ini
@@ -1,3 +1,4 @@
 [document-base-url-window-initiator-is-not-opener.https.window.html]
+  expected: TIMEOUT
   [window.open() gets base url from initiator not opener.]
     expected: [FAIL, PASS, TIMEOUT]
diff --git a/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini b/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
index 830aeb8ae48..fdc27d37788 100644
--- a/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
+++ b/tests/wpt/meta/html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html.ini
@@ -1,7 +1,6 @@
 [autofocus-dialog.html]
-  expected: TIMEOUT
   [<dialog> can contain autofocus, without stopping page autofocus content from working]
     expected: FAIL
 
   [<dialog>-contained autofocus element gets focused when the dialog is shown]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/meta/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini b/tests/wpt/meta/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
index dc35eb36afd..c6c406d911d 100644
--- a/tests/wpt/meta/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
+++ b/tests/wpt/meta/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
@@ -181,3 +181,6 @@
 
   [multipart/form-data: 0x00 in name (normal form)]
     expected: FAIL
+
+  [multipart/form-data: \\r\\n in value (normal form)]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini b/tests/wpt/meta/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
index 8f3b9f95aac..a4c4052c148 100644
--- a/tests/wpt/meta/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
+++ b/tests/wpt/meta/html/semantics/forms/form-submission-0/urlencoded2.window.js.ini
@@ -181,3 +181,6 @@
 
   [application/x-www-form-urlencoded: \\r\\n in filename (formdata event)]
     expected: FAIL
+
+  [application/x-www-form-urlencoded: backslash in value (normal form)]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/meta/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
new file mode 100644
index 00000000000..6339abba6d9
--- /dev/null
+++ b/tests/wpt/meta/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
@@ -0,0 +1,4 @@
+[async-script.html?reload]
+  expected: ERROR
+
+[async-script.html?default]
diff --git a/tests/wpt/meta/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/meta/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..b8bdf33cb65
--- /dev/null
+++ b/tests/wpt/meta/html/syntax/parsing/DOMContentLoaded-defer.html.ini
@@ -0,0 +1,3 @@
+[DOMContentLoaded-defer.html]
+  [The end: DOMContentLoaded and defer scripts]
+    expected: FAIL
diff --git a/tests/wpt/meta/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini b/tests/wpt/meta/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
new file mode 100644
index 00000000000..f9a4f08cd70
--- /dev/null
+++ b/tests/wpt/meta/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/meta/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini b/tests/wpt/meta/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
index 6206f8c0210..1053fb90051 100644
--- a/tests/wpt/meta/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/meta/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@@ -2,3 +2,6 @@
   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/meta/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/meta/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
index 7237f5792de..dbe1def99e3 100644
--- a/tests/wpt/meta/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/meta/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry-different-function-realm.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Thenable resolution]
     expected: FAIL
@@ -13,4 +12,4 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/meta/resource-timing/nested-context-navigations-iframe.html.ini b/tests/wpt/meta/resource-timing/nested-context-navigations-iframe.html.ini
index 9df96f72c08..23c4be4506a 100644
--- a/tests/wpt/meta/resource-timing/nested-context-navigations-iframe.html.ini
+++ b/tests/wpt/meta/resource-timing/nested-context-navigations-iframe.html.ini
@@ -1,10 +1,25 @@
 [nested-context-navigations-iframe.html]
   expected: TIMEOUT
   [Test that iframe refreshes are not observable by the parent]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [Test that crossorigin iframe refreshes are not observable by the parent]
     expected: NOTRUN
 
   [Test that cross-site iframe refreshes are not observable by the parent]
     expected: NOTRUN
+
+  [Test that crossorigin iframe navigations are not observable by the parent, even after history navigations by the parent]
+    expected: TIMEOUT
+
+  [Test that cross-site iframe navigations are not observable by the parent, even after history navigations by the parent]
+    expected: NOTRUN
+
+  [Test that iframe navigations are not observable by the parent]
+    expected: NOTRUN
+
+  [Test that crossorigin iframe navigations are not observable by the parent]
+    expected: NOTRUN
+
+  [Test that cross-site iframe navigations are not observable by the parent]
+    expected: NOTRUN
diff --git a/tests/wpt/meta/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini b/tests/wpt/meta/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
index 0df9b9fdb79..8ea9c7c2fc5 100644
--- a/tests/wpt/meta/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/meta/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@@ -703,3 +703,6 @@
 
   [X SNR (-392.77607973643745 dB) is not greater than or equal to 65.737. Got -392.77607973643745.]
     expected: FAIL
+
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[15073\]\t-1.7331029795529246e-29\t6.4605611562728882e-1\t6.4605611562728882e-1\t1.0000000000000000e+0\t3.8985999999999999e-3\n\t[15074\]\t2.5936898589134216e-1\t5.9696805477142334e-1\t3.3759906888008118e-1\t5.6552283858697683e-1\t3.8985999999999999e-3\n\tMax AbsError of 6.4605611562728882e-1 at index of 15073.\n\tMax RelError of 1.0000000000000000e+0 at index of 15073.\n]
+    expected: FAIL
diff --git a/tests/wpt/meta/webmessaging/with-ports/017.html.ini b/tests/wpt/meta/webmessaging/with-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/meta/webmessaging/with-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/meta/webmessaging/with-ports/018.html.ini b/tests/wpt/meta/webmessaging/with-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/meta/webmessaging/with-ports/018.html.ini
@@ -0,0 +1,4 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/webmessaging/without-ports/017.html.ini b/tests/wpt/meta/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/meta/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/meta/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini b/tests/wpt/meta/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
new file mode 100644
index 00000000000..aa6c9e5b826
--- /dev/null
+++ b/tests/wpt/meta/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
@@ -0,0 +1,4 @@
+[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/meta/workers/baseurl/alpha/import-in-moduleworker.html.ini b/tests/wpt/meta/workers/baseurl/alpha/import-in-moduleworker.html.ini
index 36d21059338..987e8a93681 100644
--- a/tests/wpt/meta/workers/baseurl/alpha/import-in-moduleworker.html.ini
+++ b/tests/wpt/meta/workers/baseurl/alpha/import-in-moduleworker.html.ini
@@ -1,3 +1,4 @@
 [import-in-moduleworker.html]
+  expected: ERROR
   [Base URL in module dedicated workers: import]
     expected: FAIL
diff --git a/tests/wpt/mozilla/meta-legacy-layout/mozilla/service-workers/service-worker-registration.https.html.ini b/tests/wpt/mozilla/meta-legacy-layout/mozilla/service-workers/service-worker-registration.https.html.ini
index 0492835f43e..ee7cf8c2475 100644
--- a/tests/wpt/mozilla/meta-legacy-layout/mozilla/service-workers/service-worker-registration.https.html.ini
+++ b/tests/wpt/mozilla/meta-legacy-layout/mozilla/service-workers/service-worker-registration.https.html.ini
@@ -1,6 +1,7 @@
 [service-worker-registration.https.html]
   type: testharness
   [Test: Asserts Active Service Worker and its Registration]
-      expected: FAIL
+    expected: FAIL
+
   [Test: Active Service Worker ScriptURL property]
-      expected: FAIL
+    expected: FAIL
diff --git a/tests/wpt/tests/.taskcluster.yml b/tests/wpt/tests/.taskcluster.yml
index d9e5581861e..53518a9498a 100644
--- a/tests/wpt/tests/.taskcluster.yml
+++ b/tests/wpt/tests/.taskcluster.yml
@@ -7,7 +7,7 @@ tasks:
     run_task:
       $if: 'tasks_for == "github-push"'
       then:
-        $if: 'event.ref in ["refs/heads/master", "refs/heads/epochs/daily", "refs/heads/epochs/weekly", "refs/heads/triggers/chrome_stable", "refs/heads/triggers/chrome_beta", "refs/heads/triggers/chrome_dev", "refs/heads/triggers/chrome_nightly", "refs/heads/triggers/firefox_stable", "refs/heads/triggers/firefox_beta", "refs/heads/triggers/firefox_nightly", "refs/heads/triggers/firefox_android_nightly", "refs/heads/triggers/webkitgtk_minibrowser_stable", "refs/heads/triggers/webkitgtk_minibrowser_beta", "refs/heads/triggers/webkitgtk_minibrowser_nightly", "refs/heads/triggers/servo_nightly"]'
+        $if: 'event.ref in ["refs/heads/master", "refs/heads/epochs/daily", "refs/heads/epochs/weekly", "refs/heads/triggers/chrome_stable", "refs/heads/triggers/chrome_beta", "refs/heads/triggers/chrome_canary", "refs/heads/triggers/chrome_dev", "refs/heads/triggers/chrome_nightly", "refs/heads/triggers/firefox_stable", "refs/heads/triggers/firefox_beta", "refs/heads/triggers/firefox_nightly", "refs/heads/triggers/firefox_android_nightly", "refs/heads/triggers/webkitgtk_minibrowser_stable", "refs/heads/triggers/webkitgtk_minibrowser_beta", "refs/heads/triggers/webkitgtk_minibrowser_nightly", "refs/heads/triggers/servo_nightly"]'
         then: true
         else: false
       else:
diff --git a/tests/wpt/tests/css/css-animations/computed-style-animation-parsing.html b/tests/wpt/tests/css/css-animations/computed-style-animation-parsing.html
index 15a1665be5e..db51106fa8d 100644
--- a/tests/wpt/tests/css/css-animations/computed-style-animation-parsing.html
+++ b/tests/wpt/tests/css/css-animations/computed-style-animation-parsing.html
@@ -46,6 +46,23 @@ test(() => {
   testAnimation("myShorthandAnim", "myShorthandAnim");
 }, "Test a non-conflicting animation name.");
 
+test(() => {
+  testAnimation("ease", "none");
+  testAnimation("ease-in", "none");
+  testAnimation("ease-in-out", "none");
+  testAnimation("ease-out", "none");
+  testAnimation("linear", "none");
+  testAnimation("step-end", "none");
+  testAnimation("step-start", "none");
+  testAnimation("ease ease", "ease");
+  testAnimation("ease linear", "linear");
+}, "Test an animation name that is the same as a possible animation timing-function.");
+
+test(() => {
+  testAnimation("infinite", "none");
+  testAnimation("infinite infinite", "infinite");
+}, "Test an animation name that is the same as a possible animation iteration-count.");
+
 test(() => {
   testAnimation("none", "none");
   testAnimation("forwards", "none");
diff --git a/tests/wpt/tests/css/css-animations/parsing/animation-computed.html b/tests/wpt/tests/css/css-animations/parsing/animation-computed.html
index f8d34b889ba..2a70585aadc 100644
--- a/tests/wpt/tests/css/css-animations/parsing/animation-computed.html
+++ b/tests/wpt/tests/css/css-animations/parsing/animation-computed.html
@@ -18,26 +18,35 @@
 // [ none | <keyframes-name> ]
 
 test(() => {
-  assert_equals(getComputedStyle(document.getElementById('target')).animation, "0s ease 0s 1 normal none running none");
+  assert_equals(getComputedStyle(document.getElementById('target')).animation, "none");
 }, "Default animation value");
 
-test_computed_value("animation", "1s", "1s ease 0s 1 normal none running none");
-test_computed_value("animation", "cubic-bezier(0, -2, 1, 3)", "0s cubic-bezier(0, -2, 1, 3) 0s 1 normal none running none");
-test_computed_value("animation", "1s -3s", "1s ease -3s 1 normal none running none");
-test_computed_value("animation", "4", "0s ease 0s 4 normal none running none");
-test_computed_value("animation", "reverse", "0s ease 0s 1 reverse none running none");
-test_computed_value("animation", "both", "0s ease 0s 1 normal both running none");
-test_computed_value("animation", "paused", "0s ease 0s 1 normal none paused none");
-test_computed_value("animation", "none", "0s ease 0s 1 normal none running none");
-test_computed_value("animation", "anim", "0s ease 0s 1 normal none running anim");
+test_computed_value("animation", "1s", "1s");
+test_computed_value("animation", "cubic-bezier(0, -2, 1, 3)", "cubic-bezier(0, -2, 1, 3)");
+test_computed_value("animation", "ease-in-out", "ease-in-out");
+test_computed_value("animation", "1s -3s", "1s -3s");
+test_computed_value("animation", "4", "4");
+test_computed_value("animation", "reverse", "reverse");
+test_computed_value("animation", "both", "both");
+test_computed_value("animation", "paused", "paused");
+test_computed_value("animation", "none", "none");
+test_computed_value("animation", "anim", "anim");
 
 test_computed_value("animation", "anim paused both reverse 4 1s -3s cubic-bezier(0, -2, 1, 3)",
   "1s cubic-bezier(0, -2, 1, 3) -3s 4 reverse both paused anim");
 
 test_computed_value("animation", "anim paused both reverse, 4 1s -3s cubic-bezier(0, -2, 1, 3)",
-  "0s ease 0s 1 reverse both paused anim, 1s cubic-bezier(0, -2, 1, 3) -3s 4 normal none running none");
+  "reverse both paused anim, 1s cubic-bezier(0, -2, 1, 3) -3s 4");
+
+test_computed_value("animation", "none, none", "none, none");
+
+test(() => {
+  const target = document.getElementById('target');
+  target.style.animation = "initial";
+  target.style.animationDelay = "1s";
+  assert_equals(getComputedStyle(target).animation, "0s 1s");
+}, "Animation with a delay but no duration");
 
-// TODO: Add test with a single timing-function keyword.
 </script>
 </body>
 </html>
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html
index eb0b979800b..af894546942 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint-parent.html
@@ -26,8 +26,13 @@
     <div id="target"></div>
 </div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       container.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint.html
index 04578125cd5..e584c4f9a83 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-background-repaint.html
@@ -21,8 +21,13 @@
 
 <div id="target"></div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       target.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html
index 0e2c627532a..a8d55ace8fc 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint-parent.html
@@ -25,8 +25,13 @@
     <div id="target"></div>
 </div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       container.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint.html
index f8ac80f5152..aeacd72d3d2 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-border-repaint.html
@@ -20,8 +20,14 @@
 
 <div id="target"></div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       target.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html
index 69d42c1808c..e1388056063 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint-parent.html
@@ -27,8 +27,13 @@
     <div id="target"></div>
 </div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       container.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html
index 764a1af9322..87f87b0edb7 100644
--- a/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html
+++ b/tests/wpt/tests/css/css-backgrounds/color-mix-currentcolor-outline-repaint.html
@@ -22,8 +22,13 @@
 
 <div id="target"></div>
 
+<script src="/web-animations/testcommon.js"></script>
 <script>
-  addEventListener("load", () => {
+  addEventListener("load", async () => {
+    // crbug.com/1378671: Screenshot can be taken while compositor commits are
+    // still being deferred for first contentful paint (FCP). Wait for FCP
+    // before starting the test.
+    await waitForCompositorReady();
     requestAnimationFrame(() => {
       target.classList.add("green");
       requestAnimationFrame(() => {
diff --git a/tests/wpt/tests/css/css-cascade/scope-nesting.html b/tests/wpt/tests/css/css-cascade/scope-nesting.html
index 44e5b7536ae..d299ba30370 100644
--- a/tests/wpt/tests/css/css-cascade/scope-nesting.html
+++ b/tests/wpt/tests/css/css-cascade/scope-nesting.html
@@ -371,3 +371,175 @@ test((t) => {
   assert_equals(getComputedStyle(c).zIndex, 'auto');
 }, 'Implicit rule within nested @scope (proximity)');
 </script>
+
+<template id=test_nested_scope_inside_an_is>
+  <div>
+    <style>
+      @scope (.a) {
+        .b {
+          /* When nesting, because we’re  inside a defined scope,
+             the `:scope` should reference the scoping root node properly, and
+             check for the presence of an extra class on it, essentially
+             being equal to `:scope.x .b { z-index: 1 }`. */
+          &:is(:scope.x *) {
+            z-index: 1;
+          }
+          /* This should not match, as we have a defined scope, and should
+             not skip to the root. */
+          &:is(:root:scope *) {
+            z-index: 2;
+          }
+        }
+        /* The nested case can be though of the following when expanded: */
+        .c:is(:scope.x *) {
+          z-index: 3;
+        }
+      }
+    </style>
+    <div class="b">
+    </div>
+    <div class="a x">
+      <div class="b">
+      </div>
+      <div class="c">
+      </div>
+    </div>
+</div>
+</template>
+<script>
+test((t) => {
+  t.add_cleanup(() => main.replaceChildren());
+  main.append(test_nested_scope_inside_an_is.content.cloneNode(true));
+
+  let b_outside = document.querySelector('.b');
+  let b_inside = document.querySelector('.a .b');
+  let c = document.querySelector('.c');
+  assert_equals(getComputedStyle(b_outside).zIndex, 'auto');
+  assert_equals(getComputedStyle(b_inside).zIndex, '1');
+  assert_equals(getComputedStyle(c).zIndex, '3');
+}, 'Nested :scope inside an :is');
+</script>
+
+<template id=test_nested_scope_pseudo>
+  <div>
+    <style>
+      @scope (.b) {
+        .a:not(:scope) {
+          & :scope {
+            z-index: 1;
+          }
+        }
+      }
+    </style>
+    <div class="b">
+    </div>
+    <div class="a">
+      <div class="b">
+      </div>
+    </div>
+</div>
+</template>
+<script>
+test((t) => {
+  t.add_cleanup(() => main.replaceChildren());
+  main.append(test_nested_scope_pseudo.content.cloneNode(true));
+
+  let b_outside = document.querySelector('.b');
+  let b_inside = document.querySelector('.a .b');
+  assert_equals(getComputedStyle(b_outside).zIndex, 'auto');
+  assert_equals(getComputedStyle(b_inside).zIndex, '1');
+}, ':scope within nested and scoped rule');
+</script>
+
+<template id=test_nested_scope_pseudo_implied>
+  <div>
+    <style>
+      @scope (.b) {
+        .a:not(:scope) {
+          :scope { /* & implied */
+            z-index: 1;
+          }
+        }
+      }
+    </style>
+    <div class="b">
+    </div>
+    <div class="a">
+      <div class="b">
+      </div>
+    </div>
+</div>
+</template>
+<script>
+test((t) => {
+  t.add_cleanup(() => main.replaceChildren());
+  main.append(test_nested_scope_pseudo_implied.content.cloneNode(true));
+
+  let b_outside = document.querySelector('.b');
+  let b_inside = document.querySelector('.a .b');
+  assert_equals(getComputedStyle(b_outside).zIndex, 'auto');
+  assert_equals(getComputedStyle(b_inside).zIndex, '1');
+}, ':scope within nested and scoped rule (implied &)');
+</script>
+
+<template id=test_nested_scope_pseudo_relative>
+  <div>
+    <style>
+      @scope (.b) {
+        .a:not(:scope) {
+          > :scope { /* & implied */
+            z-index: 1;
+          }
+        }
+      }
+    </style>
+    <div class="b">
+    </div>
+    <div class="a">
+      <div class="b">
+      </div>
+    </div>
+</div>
+</template>
+<script>
+test((t) => {
+  t.add_cleanup(() => main.replaceChildren());
+  main.append(test_nested_scope_pseudo_relative.content.cloneNode(true));
+
+  let b_outside = document.querySelector('.b');
+  let b_inside = document.querySelector('.a .b');
+  assert_equals(getComputedStyle(b_outside).zIndex, 'auto');
+  assert_equals(getComputedStyle(b_inside).zIndex, '1');
+}, ':scope within nested and scoped rule (relative)');
+</script>
+
+<template id=test_scoped_nested_group_rule>
+  <div>
+    <style>
+      @scope (.a) {
+        .b:not(:scope) {
+          @media (width) {
+            z-index: 1;
+          }
+        }
+      }
+    </style>
+    <div class="b">
+    </div>
+    <div class="a">
+      <div class="b">
+      </div>
+    </div>
+</div>
+</template>
+<script>
+test((t) => {
+  t.add_cleanup(() => main.replaceChildren());
+  main.append(test_scoped_nested_group_rule.content.cloneNode(true));
+
+  let b_outside = document.querySelector('.b');
+  let b_inside = document.querySelector('.a .b');
+  assert_equals(getComputedStyle(b_outside).zIndex, 'auto');
+  assert_equals(getComputedStyle(b_inside).zIndex, '1');
+}, 'Scoped nested group rule');
+</script>
diff --git a/tests/wpt/tests/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html b/tests/wpt/tests/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html
new file mode 100644
index 00000000000..3f777a7574a
--- /dev/null
+++ b/tests/wpt/tests/css/css-conditional/at-supports-selector-webkit-slider-thumb.tentative.html
@@ -0,0 +1,21 @@
+<!doctype html>
+<title>CSS Test (Conditional Rules): In @supports, known -webkit- pseudo elements can be parsed successfully</title>
+<link rel="help" href="https://drafts.csswg.org/css-conditional-3/#at-supports">
+<link rel="match" href="at-supports-001-ref.html">
+<style>
+  div {
+    background:red;
+    height:100px;
+    width:100px;
+  }
+  /* This matches in user agents supporting ::-webkit-slider-thumb. */
+  @supports selector(input::-webkit-slider-thumb) {
+    div { background-color:green; }
+  }
+  /* This should never match. */
+  @supports selector(input::-webkit-asdf) {
+    div { background-color:red; }
+  }
+</style>
+<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
+<div></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-004.html b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-004.html
index 24fef4f67e9..bbf4567e37d 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-004.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-004.html
@@ -6,14 +6,13 @@
 <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
 <link rel="match" href="spacer-with-popover-top-layer-ref.html">
 <meta name="assert" content="top layer popovers render under c-v auto">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+
 <script src="/common/reftest-wait.js"></script>
 
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .auto { content-visibility: auto }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#popover { font: 25px/1 Ahem }
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-005.html b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-005.html
index 76b736a6379..264d7b317e0 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-005.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-popover-top-layer-005.html
@@ -6,14 +6,13 @@
 <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
 <link rel="match" href="spacer-with-popover-top-layer-ref.html">
 <meta name="assert" content="top layer popovers render under c-v auto">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+
 <script src="/common/reftest-wait.js"></script>
 
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .auto { content-visibility: auto }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#popover { font: 25px/1 Ahem; }
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-004.html b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-004.html
index 218251fdcdb..e21b11e92db 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-004.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-004.html
@@ -6,14 +6,13 @@
 <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
 <link rel="match" href="spacer-with-top-layer-ref.html">
 <meta name="assert" content="top layer dialogs render under c-v auto">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+
 <script src="/common/reftest-wait.js"></script>
 
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .auto { content-visibility: auto }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#dialog { font: 25px/1 Ahem; }
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-005.html b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-005.html
index c1cb1bcde35..5283aea1973 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-005.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/content-visibility-with-top-layer-005.html
@@ -6,14 +6,13 @@
 <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
 <link rel="match" href="spacer-with-top-layer-ref.html">
 <meta name="assert" content="top layer dialogs render under c-v auto">
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+
 <script src="/common/reftest-wait.js"></script>
 
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .auto { content-visibility: auto }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#dialog { font: 25px/1 Ahem; }
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-popover-top-layer-ref.html b/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-popover-top-layer-ref.html
index 5ae45afe9eb..6c4c65f58c3 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-popover-top-layer-ref.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-popover-top-layer-ref.html
@@ -1,11 +1,10 @@
 <!doctype html>
 <meta charset="utf8">
 <title>CSS Content Visibility: popover shows under c-v auto (ref)</title>
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#popover { font: 25px/1 Ahem; }
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-top-layer-ref.html b/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-top-layer-ref.html
index 7cf1f1581b7..b5cb1f108e5 100644
--- a/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-top-layer-ref.html
+++ b/tests/wpt/tests/css/css-contain/content-visibility/spacer-with-top-layer-ref.html
@@ -1,11 +1,10 @@
 <!doctype html>
 <meta charset="utf8">
 <title>CSS Content Visibility: dialog shows under c-v auto (ref)</title>
-<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 .box { width: 100px; height: 100px; border: 1px solid black; }
 .spacer { width: 10px; height: 3000px; background: lightblue; }
-#dialog { font: 25px/1 Ahem; }
+
 </style>
 
 <div class=spacer></div>
diff --git a/tests/wpt/tests/css/css-flexbox/META.yml b/tests/wpt/tests/css/css-flexbox/META.yml
index 0bcad0b51f7..503fc08f576 100644
--- a/tests/wpt/tests/css/css-flexbox/META.yml
+++ b/tests/wpt/tests/css/css-flexbox/META.yml
@@ -2,7 +2,6 @@ spec: https://drafts.csswg.org/css-flexbox/
 suggested_reviewers:
   - kojiishi
   - plinss
-  - mrego
   - cbiesinger
   - fantasai
   - rachelandrew
diff --git a/tests/wpt/tests/css/css-grid/META.yml b/tests/wpt/tests/css/css-grid/META.yml
index e49946f4f70..55f9d72fa50 100644
--- a/tests/wpt/tests/css/css-grid/META.yml
+++ b/tests/wpt/tests/css/css-grid/META.yml
@@ -1,6 +1,5 @@
 spec: https://drafts.csswg.org/css-grid/
 suggested_reviewers:
-  - mrego
   - plinss
   - tabatkins
   - fantasai
diff --git a/tests/wpt/tests/css/css-grid/fieldset-first-line-crash.html b/tests/wpt/tests/css/css-grid/fieldset-first-line-crash.html
new file mode 100644
index 00000000000..096558db61b
--- /dev/null
+++ b/tests/wpt/tests/css/css-grid/fieldset-first-line-crash.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<meta charset="utf-8">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1871513">
+<style>
+*::first-line { }
+.a {
+  display: inline-grid;
+}
+</style>
+<fieldset class="a">
diff --git a/tests/wpt/tests/css/css-masking/parsing/clip-path-computed.html b/tests/wpt/tests/css/css-masking/parsing/clip-path-computed.html
index 8ec27a1472e..481c1140b4d 100644
--- a/tests/wpt/tests/css/css-masking/parsing/clip-path-computed.html
+++ b/tests/wpt/tests/css/css-masking/parsing/clip-path-computed.html
@@ -32,6 +32,7 @@ test_computed_value("clip-path", "xywh(0px 1% 2px 0.5em round 0)", "inset(1% cal
 test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0 1px)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px)");
 test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0px 1px 2em)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px 80px)");
 test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0px 1px 2% 3px)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px 2% 3px)");
+test_computed_value("clip-path", "xywh(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))", "inset(calc(1% + 1px) calc(98% - 2px) calc(96% - 4px) 0px)");
 // Given "rect(t r b l)", the equivalent function is
 // "inset(t calc(100% - r) calc(100% - b) l)".
 test_computed_value("clip-path", "rect(auto auto auto auto)", "inset(0%)");
@@ -40,6 +41,7 @@ test_computed_value("clip-path", "rect(0px 1% auto 0.5em round 0)", "inset(0px 9
 test_computed_value("clip-path", "rect(0px 1% auto 3% round 0 1px)", "inset(0px 99% 0% 3% round 0px 1px)");
 test_computed_value("clip-path", "rect(0px 1% auto 3% round 0px 1px 2em)", "inset(0px 99% 0% 3% round 0px 1px 80px)");
 test_computed_value("clip-path", "rect(0px 1% auto 3% round 0px 1px 2% 3px)", "inset(0px 99% 0% 3% round 0px 1px 2% 3px)");
+test_computed_value("clip-path", "rect(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))", "inset(0px calc(99% - 1px) calc(98% - 2px) calc(3% + 3px))");
 </script>
 </body>
 </html>
diff --git a/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible-ref.html b/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible-ref.html
new file mode 100644
index 00000000000..3a25b794d8d
--- /dev/null
+++ b/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible-ref.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<style>
+.box {
+  width: 100px;
+  height: 100px;
+  background: green;
+  display: inline-block;
+}
+</style>
+
+There should be 4 100x100 green squares (no rounded corners) below.<br>
+<div class="box"></div>
+<div class="box"></div>
+<div class="box"></div>
+<div class="box"></div>
diff --git a/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible.html b/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible.html
new file mode 100644
index 00000000000..65e7f055a39
--- /dev/null
+++ b/tests/wpt/tests/css/css-overflow/rounded-overflow-clip-visible.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<title>Border radius should not round the clipping region when mixing overflow: visible and clip</title>
+<link rel="help" href="https://drafts.csswg.org/css-overflow/#corner-clipping">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7434">
+<link rel="match" href="rounded-overflow-clip-visible-ref.html">
+<style>
+.container {
+  width: 100px;
+  height: 50px;
+  overflow: clip visible;
+  background: red;
+  display: inline-block;
+}
+.border-radius {
+  border-radius: 25px;
+}
+.child {
+  width: 200px;
+  height: 100px;
+  background: green;
+  fill: green;
+}
+</style>
+
+There should be 4 100x100 green squares (no rounded corners) below.<br>
+<div class="container border-radius">
+  <div class="child"></div>
+</div>
+
+<div class="container">
+  <div class="child"></div>
+</div>
+
+<svg class="container border-radius">
+  <rect class="child"></rect>
+</svg>
+
+<svg class="container">
+  <rect class="child"></rect>
+</svg>
diff --git a/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip-ref.html b/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip-ref.html
new file mode 100644
index 00000000000..a97633ed3bd
--- /dev/null
+++ b/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip-ref.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<style>
+.box {
+  width: 100px;
+  height: 100px;
+  background: green;
+  display: inline-block;
+}
+</style>
+
+There should be 4 100x100 green squares (no rounded corners) below.<br>
+<div class="box"></div>
+<br>
+<div class="box"></div>
+<br>
+<div class="box"></div>
+<br>
+<div class="box"></div>
diff --git a/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip.html b/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip.html
new file mode 100644
index 00000000000..8bd727e1cfd
--- /dev/null
+++ b/tests/wpt/tests/css/css-overflow/rounded-overflow-visible-clip.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<title>Border radius should not round the clipping region when mixing overflow: visible and clip</title>
+<link rel="help" href="https://drafts.csswg.org/css-overflow/#corner-clipping">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7434">
+<link rel="match" href="rounded-overflow-visible-clip-ref.html">
+<style>
+.container {
+  width: 50px;
+  height: 100px;
+  overflow: visible clip;
+  background: red;
+  display: inline-block;
+}
+.border-radius {
+  border-radius: 25px;
+}
+.child {
+  width: 100px;
+  height: 200px;
+  background: green;
+  fill: green;
+}
+</style>
+
+There should be 4 100x100 green squares (no rounded corners) below.<br>
+<div class="container border-radius">
+  <div class="child"></div>
+</div>
+<br>
+<div class="container">
+  <div class="child"></div>
+</div>
+<br>
+<svg class="container border-radius">
+  <rect class="child"></rect>
+</svg>
+<br>
+<svg class="container">
+  <rect class="child"></rect>
+</svg>
diff --git a/tests/wpt/tests/css/css-scroll-anchoring/focused-element-nested-anchor.html b/tests/wpt/tests/css/css-scroll-anchoring/focused-element-nested-anchor.html
new file mode 100644
index 00000000000..727da4046e6
--- /dev/null
+++ b/tests/wpt/tests/css/css-scroll-anchoring/focused-element-nested-anchor.html
@@ -0,0 +1,69 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+
+body { height: 4000px; }
+div { height: 100px; }
+
+.scroller {
+  overflow: scroll;
+  position: fixed;
+  width: 300px;
+  height: 300px;
+  background-color: green;
+}
+
+#posSticky {
+  top: 300px;
+  position: relative;
+  height: 50px;
+  width: 50px;
+  background-color: blue;
+}
+
+#content {
+  background-color: #D3D3D3;
+  height: 50px;
+  width: 50px;
+  position: relative;
+  top: 500px;
+}
+
+#anchor {
+  background-color: brown;
+  height: 50px;
+  width: 50px;
+  position: relative;
+  top: 200px;
+}
+
+</style>
+<div id="scroller" class="scroller">
+    <div id="content" tabindex="-1"></div>
+    <div id="anchor" tabindex="-1"></div>
+</div>
+
+<script>
+
+// Tests that a focused element doesn't become the
+// priority candidate of the main frame if it is
+// the anchor element of a subscroller
+
+promise_test(async function() {
+  var scroller = document.querySelector("#scroller");
+  var focusElement = document.querySelector("#anchor");
+  focusElement.focus();
+  scroller.scrollBy(0,150);
+  document.scrollingElement.scrollBy(0,100);
+
+  scroller.scrollBy(0, 50);
+  await new Promise(resolve => {
+     scroller.addEventListener("scroll", () => step_timeout(resolve, 0));
+   });
+
+  assert_equals(document.scrollingElement.scrollTop, 100);
+}, "Ensure there is no scroll anchoring adjustment in the main frame.");
+
+</script>
\ No newline at end of file
diff --git a/tests/wpt/tests/css/css-ui/META.yml b/tests/wpt/tests/css/css-ui/META.yml
index 7ce4b54a22c..81011208b5f 100644
--- a/tests/wpt/tests/css/css-ui/META.yml
+++ b/tests/wpt/tests/css/css-ui/META.yml
@@ -1,6 +1,5 @@
 spec: https://drafts.csswg.org/css-ui/
 suggested_reviewers:
   - frivoal
-  - mrego
   - plinss
   - svgeesus
diff --git a/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom-ref.html b/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom-ref.html
new file mode 100644
index 00000000000..dd93e0b498c
--- /dev/null
+++ b/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom-ref.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<title>View transitions: Modify style via CSSOM (ref)</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<style>
+#box {
+  width: 100px;
+  height: 100px;
+  background: limegreen;
+}
+#box {
+  transform: translateY(100px);
+}
+
+</style>
+<div id="box"></div>
diff --git a/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom.html b/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom.html
new file mode 100644
index 00000000000..6f026607bc5
--- /dev/null
+++ b/tests/wpt/tests/css/css-view-transitions/modify-style-via-cssom.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<title>View transitions: Modify style via CSSOM</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:bokan@chromium.org">
+<link rel="match" href="modify-style-via-cssom-ref.html">
+<script src="/common/reftest-wait.js"></script>
+<style>
+#box {
+  width: 100px;
+  height: 100px;
+  background: limegreen;
+}
+html::view-transition-group(root) {
+  animation-duration: 300s;
+}
+html::view-transition-new(root) {
+  animation: none;
+  opacity: 0;
+}
+html::view-transition-old(root) {
+  animation: none;
+  opacity: 1;
+}
+</style>
+<div id="box"></div>
+
+<script>
+failIfNot(document.startViewTransition, "Missing document.startViewTransition");
+
+function rAF() {
+  return new Promise(resolve => requestAnimationFrame(resolve));
+}
+
+async function runTest() {
+  await document.startViewTransition().ready;
+  await rAF();
+  await rAF();
+
+  // Once the animation is running, ensure modifying style via CSSOM is
+  // effective.
+  const cssSheet = new CSSStyleSheet();
+  cssSheet.replaceSync(`::view-transition-old(root) {
+    transform: translateY(100px);
+  }`);
+  document.adoptedStyleSheets = [cssSheet];
+
+  await rAF();
+  takeScreenshot();
+}
+onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
+</script>
+</html>
diff --git a/tests/wpt/tests/css/css-writing-modes/crashtests/chrome-bug-1512988.html b/tests/wpt/tests/css/css-writing-modes/crashtests/chrome-bug-1512988.html
new file mode 100644
index 00000000000..babe3ca7041
--- /dev/null
+++ b/tests/wpt/tests/css/css-writing-modes/crashtests/chrome-bug-1512988.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html style="position: absolute">
+  <title>Chrome crash when propagating orthogonal writing-mode to absolute positioned root element</title>
+  <link rel="help" href="https://crbug.com/1512988">
+  <body style="writing-mode: vertical-rl"></body>
+</html>
diff --git a/tests/wpt/tests/css/cssom/getComputedStyle-pseudo.html b/tests/wpt/tests/css/cssom/getComputedStyle-pseudo.html
index 35c5efe3fa8..c07347a1973 100644
--- a/tests/wpt/tests/css/cssom/getComputedStyle-pseudo.html
+++ b/tests/wpt/tests/css/cssom/getComputedStyle-pseudo.html
@@ -105,24 +105,62 @@
   <ul><li id="pseudo-invalid">Item</li></ul>
 </div>
 <script>
-test(function() {
-  var div = document.getElementById('test');
-  [":before", ":after"].forEach(function(pseudo) {
+test(() => {
+  const div = document.getElementById('test');
+  ["before", "after"].forEach(pseudo => {
+    assert_equals(getComputedStyle(div, pseudo).width, "100px");
+  });
+}, "Resolution of width is correct when pseudo-element argument is ignored (due to no colon)");
+
+test(() => {
+  const div = document.getElementById('test');
+  [
+    ":before ",
+    "::before ",
+    "::before\t",
+    "::before\f",
+    "::before\n",
+    "::before,",
+    "::before,::after",
+    "::before@after",
+    "::before#after",
+    "::\"before\"",
+    "::before\u0000",
+    "::before-->",
+    "::before0",
+  ].forEach(pseudo => {
+    assert_equals(getComputedStyle(div, pseudo).width, "", pseudo);
+  });
+}, "Resolution of width is correct when pseudo-element argument is invalid (due to a trailing token)");
+
+test(() => {
+  const div = document.getElementById('test');
+  [":before", ":after"].forEach(pseudo => {
     assert_equals(getComputedStyle(div, pseudo).width, "50px");
   });
-}, "Resolution of width is correct for ::before and ::after pseudo-elements");
+}, "Resolution of width is correct for ::before and ::after pseudo-elements (single-colon)");
+
+test(() => {
+  const div = document.getElementById('test');
+  ["::before", "::after"].forEach(pseudo => {
+    assert_equals(getComputedStyle(div, pseudo).width, "50px");
+  });
+}, "Resolution of width is correct for ::before and ::after pseudo-elements (double-colon)");
+
 test(function() {
   const div = document.getElementById('test');
   [":bef\\oRE", "::\\000041fter"].forEach(pseudo => {
     assert_equals(getComputedStyle(div, pseudo).width, "50px");
   });
 }, "Pseudo-elements can use the full range of CSS syntax");
+
 test(function() {
   var contents = document.getElementById('contents');
   [":before", ":after"].forEach(function(pseudo) {
     assert_equals(getComputedStyle(contents, pseudo).width, "50px");
   });
 }, "Resolution of width is correct for ::before and ::after pseudo-elements of display: contents elements");
+
 test(function() {
   var has_no_pseudos = document.body;
   has_no_pseudos.style.position = "relative";
@@ -135,6 +173,7 @@ test(function() {
                   "definite size");
   });
 }, "Resolution of nonexistent pseudo-element styles");
+
 test(function() {
   var none = document.getElementById('none');
   [":before", ":after"].forEach(function(pseudo) {
@@ -142,6 +181,7 @@ test(function() {
                   "Pseudo-styles of display: none elements should be correct");
   });
 }, "Resolution of pseudo-element styles in display: none elements");
+
 test(function() {
   var flex = document.getElementById('flex');
   [":before", ":after"].forEach(function(pseudo) {
@@ -149,6 +189,7 @@ test(function() {
                   "Pseudo-styles of display: flex elements should get blockified");
   });
 }, "Item-based blockification of pseudo-elements");
+
 test(function() {
   var flexNoPseudo = document.getElementById('flex-no-pseudo');
   [":before", ":after"].forEach(function(pseudo) {
@@ -156,6 +197,7 @@ test(function() {
                   "Pseudo-styles of display: flex elements should get blockified");
   });
 }, "Item-based blockification of nonexistent pseudo-elements");
+
 test(function() {
   var contentsPseudos = document.getElementById('contents-pseudos');
   [":before", ":after"].forEach(function(pseudo) {
@@ -167,6 +209,7 @@ test(function() {
                   "display: contents in " + pseudo + " should reflect other non-inherited properties in CSSOM");
   });
 }, "display: contents on pseudo-elements");
+
 test(function() {
   var contentsPseudosDynamic = document.getElementById('contents-pseudos-dynamic');
   [":before", ":after"].forEach(function(pseudo) {
@@ -183,8 +226,9 @@ test(function() {
                   "display: contents in " + pseudo + " should reflect other non-inherited properties in CSSOM");
   });
 }, "Dynamically change to display: contents on pseudo-elements");
-test(function() {
-  var div = document.getElementById('test');
+
+test(() => {
+  const div = document.getElementById('test');
   // Note that these assertions deliberately avoid assert_[not_]equals to
   // avoid gCS().length in the failure output.
   assert_true(
@@ -198,6 +242,22 @@ test(function() {
     "Should return an empty style for unknown pseudo-elements starting with colon");
 }, "Unknown pseudo-elements");
 
+test(() => {
+  const div = document.getElementById('test');
+
+  const style1 = getComputedStyle(div, "totallynotapseudo");
+  assert_throws_dom("NoModificationAllowedError", () => style1.color = "1");
+  assert_throws_dom("NoModificationAllowedError", () => style1.margin = "10px");
+
+  const style2 = getComputedStyle(div, "::totallynotapseudo");
+  assert_throws_dom("NoModificationAllowedError", () => style2.color = "1");
+  assert_throws_dom("NoModificationAllowedError", () => style2.margin = "10px");
+
+  const style3 = getComputedStyle(div, ":totallynotapseudo");
+  assert_throws_dom("NoModificationAllowedError", () => style3.color = "1");
+  assert_throws_dom("NoModificationAllowedError", () => style3.margin = "10px");
+}, "CSSStyleDeclaration is immutable");
+
 // If you add a pseudo-element identifier here, don't forget to add the corresponding style rule in
 // <style> above.
 [
@@ -214,7 +274,7 @@ test(function() {
   "view-transition-old(name)",
   "view-transition-new(name)"
 ].forEach(pseudoIdentifier => {
-  test(function() {
+  test(() => {
     assert_implements_optional(CSS.supports(`selector(::${pseudoIdentifier})`), `::${pseudoIdentifier}`);
     const li = document.querySelector('li');
     assert_true(
diff --git a/tests/wpt/tests/css/filter-effects/svg-feimage-002.html b/tests/wpt/tests/css/filter-effects/svg-feimage-002.html
new file mode 100644
index 00000000000..b462ba91ad0
--- /dev/null
+++ b/tests/wpt/tests/css/filter-effects/svg-feimage-002.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Filter Effects Test: feImage referencing an data URL</title>
+    <link rel="help" href="http://www.w3.org/TR/filter-effects-1/#feImageElement">
+    <link rel="match" href="reference/svg-feimage-ref.html">
+    <meta name="flags" content="svg">
+    <meta name="assert" content="The feImage primitve applied to the red rect should reference and display the black rect. - The rect is black to avoid color interpolation issues.">
+    <style type="text/css">
+    svg {
+        width: 500px;
+        height: 500px;
+    }
+    </style>
+</head>
+<body>
+    <p>The test passes if you see a black square and no red.</p>
+    <svg>
+        <defs>
+          <filter id="filter" x="0" y="0" width="1" height="1">
+            <feImage xlink:href="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><rect id='blackRect' width='300' height='300' fill='black'/></svg>#blackRect" preserveAspectRatio="none"/>
+          </filter>
+        </defs>
+        <rect x="1" y="1" width="298" height="298" fill="red"/>
+        <rect width="300" height="300" fill="red" filter="url(#filter)"/>
+    </svg>
+</body>
+</html>
diff --git a/tests/wpt/tests/css/selectors/parsing/invalid-pseudos.html b/tests/wpt/tests/css/selectors/parsing/invalid-pseudos.html
new file mode 100644
index 00000000000..a09572b6517
--- /dev/null
+++ b/tests/wpt/tests/css/selectors/parsing/invalid-pseudos.html
@@ -0,0 +1,16 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Selectors: Test that various prefixed pseudos are not web exposed</title>
+<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
+<link rel="help" href="https://drafts.csswg.org/selectors/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../../support/parsing-testcommon.js"></script>
+<script>
+// Pseudo-classes
+test_invalid_selector(":-internal-html-document");
+
+// Pseudo-elements
+test_invalid_selector("::-apple-attachment-controls-container");
+test_invalid_selector("::-internal-loading-auto-fill-button");
+</script>
diff --git a/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLModElement.html b/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLModElement.html
index 850fe170a50..cfdbba44647 100644
--- a/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLModElement.html
+++ b/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLModElement.html
@@ -5,8 +5,8 @@
 <meta name="help" content="https://html.spec.whatwg.org/#attributes-common-to-ins-and-del-elements">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<script src="../resources/custom-elements-helpers.js"></script>
-<script src="./resources/reactions.js"></script>
+<script src="../../resources/custom-elements-helpers.js"></script>
+<script src="../resources/reactions.js"></script>
 
 <script>
 
diff --git a/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html b/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html
index afa31bb465f..ca34e81e3bb 100644
--- a/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html
+++ b/tests/wpt/tests/custom-elements/reactions/customized-builtins/HTMLOptGroupElement.html
@@ -6,8 +6,8 @@
 <meta name="help" content="https://html.spec.whatwg.org/#the-optgroup-element">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<script src="../resources/custom-elements-helpers.js"></script>
-<script src="./resources/reactions.js"></script>
+<script src="../../resources/custom-elements-helpers.js"></script>
+<script src="../resources/reactions.js"></script>
 
 <body>
 <script>
diff --git a/tests/wpt/tests/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html b/tests/wpt/tests/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html
similarity index 100%
rename from tests/wpt/tests/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html
rename to tests/wpt/tests/fetch/security/dangling-markup/dangling-markup-mitigation-data-url.tentative.sub.html
diff --git a/tests/wpt/tests/fetch/security/dangling-markup-mitigation.tentative.html b/tests/wpt/tests/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html
similarity index 100%
rename from tests/wpt/tests/fetch/security/dangling-markup-mitigation.tentative.html
rename to tests/wpt/tests/fetch/security/dangling-markup/dangling-markup-mitigation.tentative.html
diff --git a/tests/wpt/tests/fetch/security/dangling-markup/media.html b/tests/wpt/tests/fetch/security/dangling-markup/media.html
new file mode 100644
index 00000000000..2649edcf320
--- /dev/null
+++ b/tests/wpt/tests/fetch/security/dangling-markup/media.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+  var resources = {"audio": "/media/sound_5.mp3", "video":"/media/test.mp4"};
+
+  for (const key in resources){
+    async_test(t => {
+      let elem = document.body.appendChild(document.createElement(key));
+      elem.onerror = t.unreached_func(`${key} should load`);
+      elem.oncanplay = t.step_func(() => {
+        t.done();
+      });
+      elem.src = resources[key];
+    }, `Should load ${key}`);
+
+    async_test(t => {
+      let elem = document.body.appendChild(document.createElement(key));
+      elem.onerror = t.step_func(() => {
+        t.done();
+      });
+      elem.oncanplay = t.unreached_func(`${key} should not load`);
+      elem.src = resources[key] + "?\n<";
+    }, `Should not load ${key} with dangling markup in URL`);
+  }
+</script>
diff --git a/tests/wpt/tests/fetch/security/dangling-markup/option.html b/tests/wpt/tests/fetch/security/dangling-markup/option.html
new file mode 100644
index 00000000000..f528bed999b
--- /dev/null
+++ b/tests/wpt/tests/fetch/security/dangling-markup/option.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/helper.js"></script>
+<body>
+<script>
+
+  var tests = [
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post">
+        <input type="submit">
+        <select name="dangling"><option>
+    `,
+    `
+      <div>
+        <form action="/resource-timing/resources/document-navigated.html" method="post">
+          <input type="submit">
+          <select name="dangling"><option>
+    `,
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">
+        <input type="submit">
+      </form>
+      <select name="dangling" form="form"><option>
+    `,
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post">
+        <input type="submit">
+        <select name="dangling"><option label="yay">
+    `,
+    `
+      <div>
+        <form action="/resource-timing/resources/document-navigated.html" method="post">
+          <input type="submit">
+          <select name="dangling"><option label="yay">
+    `,
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">
+        <input type="submit">
+      </form>
+      <select name="dangling" form="form"><option label="yay">
+    `
+  ];
+
+  tests.forEach(markup => {
+    async_test(t => {
+      var i = createFrame(`${markup}sekrit<element attribute></element>`);
+      assert_no_submission(t, i);
+    }, markup.replace(/[\n\r]/g, ''));
+  });
+</script>
diff --git a/tests/wpt/tests/fetch/security/dangling-markup/resources/helper.js b/tests/wpt/tests/fetch/security/dangling-markup/resources/helper.js
new file mode 100644
index 00000000000..100bcba7b51
--- /dev/null
+++ b/tests/wpt/tests/fetch/security/dangling-markup/resources/helper.js
@@ -0,0 +1,63 @@
+function assert_no_message_from_frame(test, frame) {
+  window.addEventListener("message", test.step_func(e => {
+    assert_not_equals(e.source, frame.contentWindow);
+  }));
+}
+
+function appendFrameAndGetElement(test, frame) {
+  return new Promise((resolve, reject) => {
+    frame.onload = test.step_func(_ => {
+      frame.onload = null;
+      resolve(frame.contentDocument.querySelector('#dangling'));
+    });
+    document.body.appendChild(frame);
+  });
+}
+
+function appendAndSubmit(test, frame) {
+  return new Promise((resolve, reject) => {
+    frame.onload = test.step_func(_ => {
+      frame.onload = null;
+      frame.contentDocument.querySelector('form').addEventListener("error", _ => {
+        resolve("error");
+      });
+      frame.contentDocument.querySelector('form').addEventListener("submit", _ => {
+        resolve("submit");
+      });
+      frame.contentDocument.querySelector('[type=submit]').click();
+    });
+    document.body.appendChild(frame);
+  });
+}
+
+function assert_no_submission(test, frame) {
+  assert_no_message_from_frame(test, frame);
+
+  appendAndSubmit(test, frame)
+    .then(test.step_func_done(result => {
+      assert_equals(result, "error");
+      frame.remove();
+    }));
+}
+
+function assert_img_loaded(test, frame) {
+  appendFrameAndGetElement(test, frame)
+    .then(test.step_func_done(img => {
+      assert_equals(img.naturalHeight, 103, "Height");
+      assert_equals(img.naturalWidth, 76, "Width");
+    }));
+}
+
+function assert_img_not_loaded(test, frame) {
+  appendFrameAndGetElement(test, frame)
+    .then(test.step_func_done(img => {
+      assert_equals(img.naturalHeight, 0, "Height");
+      assert_equals(img.naturalWidth, 0, "Width");
+    }));
+}
+
+function createFrame(markup) {
+  var i = document.createElement('iframe');
+  i.srcdoc = `${markup}sekrit`;
+  return i;
+}
diff --git a/tests/wpt/tests/fetch/security/dangling-markup/textarea.html b/tests/wpt/tests/fetch/security/dangling-markup/textarea.html
new file mode 100644
index 00000000000..c4b334edc99
--- /dev/null
+++ b/tests/wpt/tests/fetch/security/dangling-markup/textarea.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="./resources/helper.js"></script>
+<body>
+<script>
+
+  var tests = [
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post">
+        <input type="submit">
+        <textarea name="dangling">
+    `,
+    `
+      <div>
+        <form action="/resource-timing/resources/document-navigated.html" method="post">
+          <input type="submit">
+          <textarea name="dangling">
+    `,
+    `
+      <form action="/resource-timing/resources/document-navigated.html" method="post" id="form">
+        <input type="submit">
+      </form>
+      <textarea name="dangling" form="form">
+    `
+  ];
+
+  tests.forEach(markup => {
+    async_test(t => {
+      var i = createFrame(`${markup}sekrit<element attribute></element>`);
+      assert_no_submission(t, i);
+    }, markup.replace(/[\n\r]/g, ''));
+  });
+</script>
diff --git a/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container-ref.html b/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container-ref.html
new file mode 100644
index 00000000000..856f7940b60
--- /dev/null
+++ b/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container-ref.html
@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1858984">
+<style>
+#overflowHiddenContainer
+{
+  margin: 4px;
+  height: 12px;
+  border: 1px solid black;
+  overflow: hidden;
+  line-height: 25px;
+}
+
+#container
+{
+  position:       relative;
+  display:        inline-block;
+  width:          30px;
+  height:         10px;
+  vertical-align: text-top;
+}
+
+#visibleTarget
+{
+  position: absolute;
+  inset:    0;
+  height:   15px;
+}
+
+</style>
+</head>
+<body>
+  <div id="overflowHiddenContainer">
+    <label id="container">
+      <div tabindex=0 id="visibleTarget">
+      </div>
+    </label>
+  </div>
+</body>
+<script>
+  visibleTarget.focus();
+</script>
+</html>
diff --git a/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container.html b/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container.html
new file mode 100644
index 00000000000..31d2a8bce9f
--- /dev/null
+++ b/tests/wpt/tests/focus/focus-large-element-in-overflow-hidden-container.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1858984">
+<link rel="match" href="focus-large-element-in-overflow-hidden-container-ref.html">
+<style>
+#overflowHiddenContainer
+{
+  margin: 4px;
+  height: 12px;
+  border: 1px solid black;
+  overflow: hidden;
+  line-height: 25px;
+}
+
+#container
+{
+  position:       relative;
+  display:        inline-block;
+  width:          30px;
+  height:         10px;
+  vertical-align: text-top;
+}
+
+#visibleTarget
+{
+  position: absolute;
+  left:     0;
+  top:      0;
+  right:    0;
+  bottom:   0;
+  height:   15px;
+}
+
+#error
+{
+  position:         absolute;
+  left:             0;
+  bottom:           0;
+  background-color: red;
+  height:           5px;
+  width:            5px;
+}
+</style>
+</head>
+<body>
+  <div id="overflowHiddenContainer">
+    <label id="container">
+      <div tabindex=0 id="visibleTarget">
+        <div id="error"></div>
+      </div>
+    </label>
+  </div>
+</body>
+<script>
+  visibleTarget.focus();
+</script>
+</html>
diff --git a/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container-ref.html b/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container-ref.html
new file mode 100644
index 00000000000..d9c41abb659
--- /dev/null
+++ b/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container-ref.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1858984">
+<style>
+#container
+{
+  margin: 4px;
+  height: 25px;
+  border: 1px solid black;
+  overflow: hidden;
+  line-height: 25px;
+}
+
+#switch
+{
+  position:       relative;
+  display:        inline-block;
+  width:          30px;
+  height:         17px;
+  vertical-align: text-top;
+}
+
+#checkbox
+{
+  opacity: 0;
+  width:   0;
+  height:  0;
+}
+
+#slider
+{
+  position:         absolute;
+  inset:            0;
+  background-color: #ccc;
+}
+</style>
+</head>
+<body>
+  <div id="container">
+    <label id="switch">
+      <input id="checkbox" type="checkbox">
+      <span id="slider"></span>
+    </label>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container.html b/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container.html
new file mode 100644
index 00000000000..22f5c3349d8
--- /dev/null
+++ b/tests/wpt/tests/focus/focus-visible-element-in-overflow-hidden-container.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1858984">
+<link rel="match" href="focus-visible-element-in-overflow-hidden-container-ref.html">
+<style>
+#overflowHiddenContainer
+{
+  margin: 4px;
+  height: 25px;
+  border: 1px solid black;
+  overflow: hidden;
+  line-height: 25px;
+}
+
+#container
+{
+  position:       relative;
+  display:        inline-block;
+  width:          30px;
+  height:         17px;
+  vertical-align: text-top;
+}
+
+#emptyCheckbox
+{
+  opacity: 0;
+  width:   0;
+  height:  0;
+}
+
+#visibleTarget
+{
+  position:         absolute;
+  inset:            0;
+  background-color: #ccc;
+}
+</style>
+</head>
+<body>
+  <div id="overflowHiddenContainer">
+    <label id="container">
+      <input id="emptyCheckbox" type="checkbox">
+      <span id="visibleTarget"></span>
+    </label>
+  </div>
+</body>
+<script>
+  emptyCheckbox.focus();
+</script>
+</html>
diff --git a/tests/wpt/tests/html/browsers/the-window-object/window-properties.https.html b/tests/wpt/tests/html/browsers/the-window-object/window-properties.https.html
index c61fb04ae24..2fb408cdc99 100644
--- a/tests/wpt/tests/html/browsers/the-window-object/window-properties.https.html
+++ b/tests/wpt/tests/html/browsers/the-window-object/window-properties.https.html
@@ -179,6 +179,7 @@ var writableAttributes = [
   "onmouseover",
   "onmouseup",
   "onmousewheel",
+  "onmove",
   "onoffline",
   "ononline",
   "onpause",
diff --git a/tests/wpt/tests/html/canvas/element/filters/svg-filter-crash.html b/tests/wpt/tests/html/canvas/element/manual/filters/svg-filter-crash.html
similarity index 100%
rename from tests/wpt/tests/html/canvas/element/filters/svg-filter-crash.html
rename to tests/wpt/tests/html/canvas/element/manual/filters/svg-filter-crash.html
diff --git a/tests/wpt/tests/html/webappapis/scripting/events/event-handler-onmove.html b/tests/wpt/tests/html/webappapis/scripting/events/event-handler-onmove.html
new file mode 100644
index 00000000000..e4454a20a15
--- /dev/null
+++ b/tests/wpt/tests/html/webappapis/scripting/events/event-handler-onmove.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<title>Window Object 'onmove'</title>
+<link rel="author" title="Sonja Laurila" href="mailto:laurila@google.com">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/#handler-window-onmove">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<script>
+promise_test(async t => {
+  var onMoveCalled = false;
+  window.onmove = (event) => { onMoveCalled = true; }
+  window.dispatchEvent(new Event('move'));
+  assert_true(onMoveCalled, "The onMove handler has been executed.");
+}, "Window move event");
+</script>
\ No newline at end of file
diff --git a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-self.https.sub.html b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-self.https.sub.html
index 1aa219bffe8..563b7a80ebe 100644
--- a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-self.https.sub.html
+++ b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-self.https.sub.html
@@ -122,7 +122,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          same_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].sameOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
@@ -130,7 +130,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          cross_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].crossOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
diff --git a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-some.https.sub.html b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-some.https.sub.html
index a27018e98f1..4515679c184 100644
--- a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-some.https.sub.html
+++ b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-allowed-for-some.https.sub.html
@@ -102,13 +102,13 @@
   }
 
   // Test that the header policy of the iframe document does not change the
-  // frame policy.
+  // frame policy.:
   for (var i = 0; i < policies.length; i++) {
     for (var j = 0; j < header_policies.length; j++) {
       test(function() {
         test_frame_policy(
           'fullscreen',
-          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          same_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].sameOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
@@ -116,7 +116,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          cross_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].crossOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
@@ -124,7 +124,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          cross_origin_src1 + pipe_front + header_policies[j] + pipe_end,
+          cross_origin_src1 + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].crossOrigin1TestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on another cross origin iframe with allow = "' + policies[i].allow +
diff --git a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-disallowed-for-all.https.sub.html b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-disallowed-for-all.https.sub.html
index e7869b1ea1a..8d5c3f43f43 100644
--- a/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-disallowed-for-all.https.sub.html
+++ b/tests/wpt/tests/permissions-policy/permissions-policy-frame-policy-disallowed-for-all.https.sub.html
@@ -88,7 +88,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          same_origin_src + pipe_front + header_policies[j] + pipe_end,
+          same_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].sameOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on same origin iframe with allow = "' + policies[i].allow +
@@ -96,7 +96,7 @@
       test(function() {
         test_frame_policy(
           'fullscreen',
-          cross_origin_src + pipe_front + header_policies[j] + pipe_end,
+          cross_origin_src + pipe_front + header_policies[j].replace(")", "\\)") + pipe_end,
           undefined, policies[i].crossOriginTestExpect,
           'fullscreen ' + policies[i].allow + ';');
       }, 'Test frame policy on cross origin iframe with allow = "' + policies[i].allow +
diff --git a/tests/wpt/tests/svg/struct/reftests/use-encoding.svg b/tests/wpt/tests/svg/struct/reftests/use-encoding.svg
new file mode 100644
index 00000000000..e376fa18b77
--- /dev/null
+++ b/tests/wpt/tests/svg/struct/reftests/use-encoding.svg
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <title>&#x3c;use&#x3e; with an encoded href</title>
+  <h:link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UseElementHrefAttribute"/>
+  <h:link rel="match" href="reference/green-100x100.svg"/>
+  <defs>
+    <rect id="a b" width="100" height="100" fill="green"/>
+  </defs>
+  <rect width="100" height="100" fill="red"/>
+  <use href="#a%20b"></use>
+</svg>
diff --git a/tests/wpt/tests/tools/requirements_mypy.txt b/tests/wpt/tests/tools/requirements_mypy.txt
index af20e5a9a76..c3db2292af5 100644
--- a/tests/wpt/tests/tools/requirements_mypy.txt
+++ b/tests/wpt/tests/tools/requirements_mypy.txt
@@ -6,9 +6,9 @@ typed-ast==1.5.5
 types-atomicwrites==1.4.5.1
 types-python-dateutil==2.8.19.14
 types-PyYAML==6.0.12.12
-types-requests==2.31.0.2
+types-requests==2.31.0.20231231
 types-setuptools==68.0.0.3
 types-six==1.16.21.9
-types-ujson==5.8.0.1
+types-ujson==5.9.0.0
 types-urllib3==1.26.25.14
 typing_extensions==4.7.1
diff --git a/tests/wpt/tests/tools/requirements_pytest.txt b/tests/wpt/tests/tools/requirements_pytest.txt
index 93ec70d7e61..9034cda7190 100644
--- a/tests/wpt/tests/tools/requirements_pytest.txt
+++ b/tests/wpt/tests/tools/requirements_pytest.txt
@@ -1,3 +1,3 @@
-pytest==7.4.2
+pytest==7.4.4
 pytest-cov==4.1.0
 hypothesis==6.78.2
diff --git a/tests/wpt/tests/tools/wpt/virtualenv.py b/tests/wpt/tests/tools/wpt/virtualenv.py
index 742f572c34a..f1fad732701 100644
--- a/tests/wpt/tests/tools/wpt/virtualenv.py
+++ b/tests/wpt/tests/tools/wpt/virtualenv.py
@@ -46,7 +46,7 @@ class Virtualenv:
 
     def create(self):
         if os.path.exists(self.path):
-            shutil.rmtree(self.path)
+            shutil.rmtree(self.path, ignore_errors=True)
             self._working_set = None
         call(*self.virtualenv, self.path)
 
diff --git a/tests/wpt/tests/tools/wptrunner/wptrunner/executors/base.py b/tests/wpt/tests/tools/wptrunner/wptrunner/executors/base.py
index 7ef9c9b54cb..7abb1660bae 100644
--- a/tests/wpt/tests/tools/wptrunner/wptrunner/executors/base.py
+++ b/tests/wpt/tests/tools/wptrunner/wptrunner/executors/base.py
@@ -763,8 +763,9 @@ class CallbackHandler:
                     # AttributeError got an obj property in Python 3.10, for older versions we
                     # fall back to looking at the error message.
                     if ((hasattr(e, "obj") and getattr(e, "obj") == self.protocol) or
-                        "'{self.protocol.__class__.__name__}' has no attribute" in str(e)):
+                        f"'{self.protocol.__class__.__name__}' object has no attribute" in str(e)):
                         raise NotImplementedError from e
+                    raise
         except self.unimplemented_exc:
             self.logger.warning("Action %s not implemented" % action)
             self._send_message(cmd_id, "complete", "error", f"Action {action} not implemented")
diff --git a/tests/wpt/tests/webauthn/helpers.js b/tests/wpt/tests/webauthn/helpers.js
index 56d941a3ed8..5b30749bf37 100644
--- a/tests/wpt/tests/webauthn/helpers.js
+++ b/tests/wpt/tests/webauthn/helpers.js
@@ -626,3 +626,52 @@ function virtualAuthenticatorPromiseTest(
     return testCb(t);
   }, name);
 }
+
+function bytesEqual(a, b) {
+  if (a instanceof ArrayBuffer) {
+    a = new Uint8Array(a);
+  }
+  if (b instanceof ArrayBuffer) {
+    b = new Uint8Array(b);
+  }
+  if (a.byteLength != b.byteLength) {
+    return false;
+  }
+  for (let i = 0; i < a.byteLength; i++) {
+    if (a[i] != b[i]) {
+      return false;
+    }
+  }
+  return true;
+}
+
+// Compares two PublicKeyCredentialUserEntity objects.
+function userEntityEquals(a, b) {
+  return bytesEqual(a.id, b.id) && a.name == b.name && a.displayName == b.displayName;
+}
+
+// Asserts that `actual` and `expected`, which are both JSON types, are equal.
+// The object key order is ignored for comparison.
+function assertJsonEquals(actual, expected, optMsg) {
+  // Returns a copy of `jsonObj`, which must be a JSON type, with object keys
+  // recursively sorted in lexicographic order; or simply `jsonObj` if it is not
+  // an instance of Object.
+  function deepSortKeys(jsonObj) {
+    if (jsonObj instanceof Array) {
+      return Array.from(jsonObj, (x) => { return deepSortKeys(x); })
+    }
+    if (typeof jsonObj !== 'object' || jsonObj === null ||
+      jsonObj.__proto__.constructor !== Object ||
+      Object.keys(jsonObj).length === 0) {
+      return jsonObj;
+    }
+    return Object.keys(jsonObj).sort().reduce((acc, key) => {
+      acc[key] = deepSortKeys(jsonObj[key]);
+      return acc;
+    }, {});
+  }
+
+  assert_equals(
+    JSON.stringify(deepSortKeys(actual)),
+    JSON.stringify(deepSortKeys(expected)), optMsg);
+}
diff --git a/tests/wpt/tests/webauthn/public-key-credential-creation-options-from-json.https.window.js b/tests/wpt/tests/webauthn/public-key-credential-creation-options-from-json.https.window.js
new file mode 100644
index 00000000000..c0f1a08cf90
--- /dev/null
+++ b/tests/wpt/tests/webauthn/public-key-credential-creation-options-from-json.https.window.js
@@ -0,0 +1,213 @@
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+// META: script=/resources/utils.js
+// META: script=helpers.js
+
+// The string "test" as ASCII bytes and base64url-encoded.
+const test_bytes = new Uint8Array([0x74, 0x65, 0x73, 0x74]);
+const test_b64 = "dGVzdA";
+
+test(() => {
+  let actual = PublicKeyCredential.parseCreationOptionsFromJSON({
+    rp: {
+      id: "example.com",
+      name: "Example Inc",
+    },
+    user: {
+      id: test_b64,
+      name: "test@example.com",
+      displayName: "test user"
+    },
+    challenge: test_b64,
+    pubKeyCredParams: [
+      {
+        type: "public-key",
+        alg: -7,
+      },
+    ],
+  });
+  let expected = {
+    rp: {
+      id: "example.com",
+      name: "Example Inc",
+    },
+    user: {
+      id: test_bytes,
+      name: "test@example.com",
+      displayName: "test user"
+    },
+    challenge: test_bytes,
+    pubKeyCredParams: [
+      {
+        type: "public-key",
+        alg: -7,
+      },
+    ],
+    // The spec defaults the following fields:
+    attestation: "none",
+    hints: [],
+  };
+
+  assertJsonEquals(actual.rp, expected.rp);
+  assert_true(userEntityEquals(actual.user, expected.user));
+  assert_true(bytesEqual(actual.challenge, expected.challenge));
+  assertJsonEquals(actual.pubKeyCredParams, expected.pubKeyCredParams, "pk");
+  assert_equals(actual.attestation, expected.attestation);
+  assertJsonEquals(actual.hints, expected.hints);
+}, "parseCreationOptionsFromJSON()");
+
+test(() => {
+  assert_throws_dom("EncodingError", () => {
+    PublicKeyCredential.parseCreationOptionsFromJSON({
+      rp: {
+        id: "example.com",
+        name: "Example Inc",
+      },
+      user: {
+        id: "not valid base64url",
+        name: "test@example.com",
+        displayName: "test user"
+      },
+      challenge: "not valid base64url",
+      pubKeyCredParams: [
+        {
+          type: "public-key",
+          alg: -7,
+        },
+      ],
+    });
+  });
+}, "parseCreationOptionsFromJSON() throws EncodingError");
+
+test(() => {
+  let actual = PublicKeyCredential.parseCreationOptionsFromJSON({
+    rp: {
+      id: "example.com",
+      name: "Example Inc",
+    },
+    user: {
+      id: test_b64,
+      name: "test@example.com",
+      displayName: "test user"
+    },
+    challenge: test_b64,
+    pubKeyCredParams: [
+      {
+        type: "public-key",
+        alg: -7,
+      },
+    ],
+    extensions: {
+      appid: "app id",
+      appidExclude: "app id exclude",
+      hamcCreateSecret: true,
+      uvm: true,
+      credentialProtectionPolicy: "cred protect",
+      enforceCredentialProtectionPolicy: true,
+      minPinLength: true,
+      credProps: true,
+      largeBlob: {
+        support: "large blob support",
+        read: true,
+        write: test_b64,
+      },
+      credBlob: test_b64,
+      getCredBlob: true,
+      supplementalPubKeys: {
+        scopes: ["spk scope"],
+        attestation: "directest",
+        attestationFormats: ["asn2"],
+      },
+      prf: {
+        eval: {
+          first: test_b64,
+          second: test_b64,
+        },
+        evalByCredential: {
+          "test cred": {
+            first: test_b64,
+            second: test_b64,
+          },
+        },
+      },
+    },
+  });
+  let expected = {
+    rp: {
+      id: "example.com",
+      name: "Example Inc",
+    },
+    user: {
+      id: test_bytes,
+      name: "test@example.com",
+      displayName: "test user"
+    },
+    challenge: test_bytes,
+    pubKeyCredParams: [
+      {
+        type: "public-key",
+        alg: -7,
+      },
+    ],
+    extensions: {
+      appid: "app id",
+      appidExclude: "app id exclude",
+      hamcCreateSecret: true,
+      uvm: true,
+      credentialProtectionPolicy: "cred protect",
+      enforceCredentialProtectionPolicy: true,
+      minPinLength: true,
+      credProps: true,
+      largeBlob: {
+        support: "large blob support",
+        read: true,
+        write: test_bytes,
+      },
+      credBlob: test_bytes,
+      getCredBlob: true,
+      supplementalPubKeys: {
+        scopes: ["spk scope"],
+        attestation: "directest",
+        attestationFormats: ["asn2"],
+      },
+      prf: {
+        eval: {
+          first: test_bytes,
+          second: test_bytes,
+        },
+        evalByCredential: {
+          "test cred": {
+            first: test_bytes,
+            second: test_bytes,
+          },
+        },
+      },
+      // The spec defaults the following fields:
+      attestation: "none",
+      hints: [],
+    },
+  };
+
+  assert_equals(actual.extensions.appid, expected.extensions.appid);
+  assert_equals(actual.extensions.appidExclude, expected.extensions.appidExclude);
+  assert_equals(actual.extensions.hmacCreateSecret, expected.extensions.hmacCreateSecret);
+  assert_equals(actual.extensions.uvm, expected.extensions.uvm);
+  assert_equals(actual.extensions.credentialProtectionPolicy, expected.extensions.credentialProtectionPolicy);
+  assert_equals(actual.extensions.enforceCredentialProtectionPolicy, expected.extensions.enforceCredentialProtectionPolicy);
+  assert_equals(actual.extensions.minPinLength, expected.extensions.minPinLength);
+  assert_equals(actual.extensions.credProps, expected.extensions.credProps);
+  assert_equals(actual.extensions.largeBlob.support, expected.extensions.largeBlob.support, "X");
+  assert_equals(actual.extensions.largeBlob.read, expected.extensions.largeBlob.read);
+
+  assert_true(bytesEqual(actual.extensions.largeBlob.write, expected.extensions.largeBlob.write), "XX");
+
+  assert_true(bytesEqual(actual.extensions.credBlob, expected.extensions.credBlob), "XXX");
+
+  assert_equals(actual.extensions.getCredBlob, expected.extensions.getCredBlob);
+  assertJsonEquals(actual.extensions.supplementalPubKeys, expected.extensions.supplementalPubKeys);
+  let prfValuesEquals = (a, b) => {
+    return bytesEqual(a.first, b.first) && bytesEqual(a.second, b.second);
+  };
+  assert_true(prfValuesEquals(actual.extensions.prf.eval, expected.extensions.prf.eval), "prf eval");
+  assert_true(prfValuesEquals(actual.extensions.prf.evalByCredential["test cred"], expected.extensions.prf.evalByCredential["test cred"]), "prf ebc");
+}, "parseCreationOptionsFromJSON() with extensions");
diff --git a/tests/wpt/tests/webauthn/public-key-credential-to-json.https.window.js b/tests/wpt/tests/webauthn/public-key-credential-to-json.https.window.js
index 1fbd4341cc5..8ef25132197 100644
--- a/tests/wpt/tests/webauthn/public-key-credential-to-json.https.window.js
+++ b/tests/wpt/tests/webauthn/public-key-credential-to-json.https.window.js
@@ -115,29 +115,6 @@ function publicKeyCredentialToJson(cred) {
   return convertObject(cred, keys);
 }
 
-// Returns a copy of `jsonObj`, which must be a JSON type, with object keys
-// recursively sorted in lexicographic order; or simply `jsonObj` if it is not
-// an instance of Object.
-function deepSortKeys(jsonObj) {
-  if (typeof jsonObj !== 'object' || jsonObj === null ||
-      jsonObj.__proto__.constructor !== Object ||
-      Object.keys(jsonObj).length === 0) {
-    return jsonObj;
-  }
-  return Object.keys(jsonObj).sort().reduce((acc, key) => {
-    acc[key] = deepSortKeys(jsonObj[key]);
-    return acc;
-  }, {});
-}
-
-// Asserts that `actual` and `expected`, which are both JSON types, are equal.
-// The object key order is ignored for comparison.
-function assertJsonEquals(actual, expected, optMsg) {
-  assert_equals(
-      JSON.stringify(deepSortKeys(actual)),
-      JSON.stringify(deepSortKeys(expected)), optMsg);
-}
-
 virtualAuthenticatorPromiseTest(
     async t => {
       let credential = await createCredential();
diff --git a/tests/wpt/tests/webcodecs/per-frame-qp-encoding.https.any.js b/tests/wpt/tests/webcodecs/per-frame-qp-encoding.https.any.js
index 81cc6c27d4f..8ec96c3f703 100644
--- a/tests/wpt/tests/webcodecs/per-frame-qp-encoding.https.any.js
+++ b/tests/wpt/tests/webcodecs/per-frame-qp-encoding.https.any.js
@@ -56,7 +56,7 @@ async function per_frame_qp_test(t, encoder_config, qp_range, validate_result) {
   const h = encoder_config.height;
   await checkEncoderSupport(t, encoder_config);
 
-  let frames_to_encode = 24;
+  const frames_to_encode = 12;
   let frames_decoded = 0;
   let frames_encoded = 0;
   let chunks = [];
@@ -78,15 +78,14 @@ async function per_frame_qp_test(t, encoder_config, qp_range, validate_result) {
   let qp = qp_range.min;
   for (let i = 0; i < frames_to_encode; i++) {
     let frame = createDottedFrame(w, h, i);
-    if (qp < qp_range.max) {
-      qp++;
-    } else {
-      qp = qp_range.min;
-    }
     let encode_options = {keyFrame: false};
     set_qp(encode_options, qp);
     encoder.encode(frame, encode_options);
     frame.close();
+    qp += 3;
+    if (qp > qp_range.max) {
+      qp = qp_range.min
+    }
   }
   await encoder.flush();
 
diff --git a/tests/wpt/tests/webcodecs/video-encoder-utils.js b/tests/wpt/tests/webcodecs/video-encoder-utils.js
index 855531a76a6..0838260d31b 100644
--- a/tests/wpt/tests/webcodecs/video-encoder-utils.js
+++ b/tests/wpt/tests/webcodecs/video-encoder-utils.js
@@ -53,7 +53,7 @@ function validateBlackDots(frame, count) {
   const width = frame.displayWidth;
   const height = frame.displayHeight;
   let cnv = new OffscreenCanvas(width, height);
-  var ctx = cnv.getContext('2d');
+  var ctx = cnv.getContext('2d', {willReadFrequently: true});
   ctx.drawImage(frame, 0, 0);
   const dot_size = 20;
   const step = dot_size * 2;
diff --git a/tests/wpt/tests/webdriver/tests/bidi/browsing_context/set_viewport/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/browsing_context/set_viewport/invalid.py
index 2a90af4da0b..744bc0f7f79 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/browsing_context/set_viewport/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/browsing_context/set_viewport/invalid.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 
 import webdriver.bidi.error as error
diff --git a/tests/wpt/tests/webdriver/tests/bidi/input/perform_actions/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/input/perform_actions/invalid.py
index f1e8c3c441a..4ae3039f473 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/input/perform_actions/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/input/perform_actions/invalid.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 import pytest_asyncio
 
diff --git a/tests/wpt/tests/webdriver/tests/bidi/script/call_function/invalid.py b/tests/wpt/tests/webdriver/tests/bidi/script/call_function/invalid.py
index 9de343955c8..af94e86efe1 100644
--- a/tests/wpt/tests/webdriver/tests/bidi/script/call_function/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/bidi/script/call_function/invalid.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 import webdriver.bidi.error as error
 
diff --git a/tests/wpt/tests/webdriver/tests/classic/element_clear/clear.py b/tests/wpt/tests/webdriver/tests/classic/element_clear/clear.py
index 22c07b6a8ce..9a0549ce4f2 100644
--- a/tests/wpt/tests/webdriver/tests/classic/element_clear/clear.py
+++ b/tests/wpt/tests/webdriver/tests/classic/element_clear/clear.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 from webdriver import WebElement
 
diff --git a/tests/wpt/tests/webdriver/tests/classic/fullscreen_window/stress.py b/tests/wpt/tests/webdriver/tests/classic/fullscreen_window/stress.py
index b907a31f17e..cbc5e28c903 100644
--- a/tests/wpt/tests/webdriver/tests/classic/fullscreen_window/stress.py
+++ b/tests/wpt/tests/webdriver/tests/classic/fullscreen_window/stress.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 import pytest
 
 from tests.support.asserts import assert_success
diff --git a/tests/wpt/tests/webdriver/tests/classic/maximize_window/maximize.py b/tests/wpt/tests/webdriver/tests/classic/maximize_window/maximize.py
index 3cbd47043f5..3a20a0d5589 100644
--- a/tests/wpt/tests/webdriver/tests/classic/maximize_window/maximize.py
+++ b/tests/wpt/tests/webdriver/tests/classic/maximize_window/maximize.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 from tests.support.asserts import assert_error, assert_success
 from tests.support.helpers import (
     document_hidden,
diff --git a/tests/wpt/tests/webdriver/tests/classic/maximize_window/stress.py b/tests/wpt/tests/webdriver/tests/classic/maximize_window/stress.py
index 986f6346e90..23f048e846b 100644
--- a/tests/wpt/tests/webdriver/tests/classic/maximize_window/stress.py
+++ b/tests/wpt/tests/webdriver/tests/classic/maximize_window/stress.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 import time
 
 import pytest
diff --git a/tests/wpt/tests/webdriver/tests/classic/minimize_window/minimize.py b/tests/wpt/tests/webdriver/tests/classic/minimize_window/minimize.py
index ed02280a135..2ad5333ec54 100644
--- a/tests/wpt/tests/webdriver/tests/classic/minimize_window/minimize.py
+++ b/tests/wpt/tests/webdriver/tests/classic/minimize_window/minimize.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 from tests.support.asserts import assert_error, assert_success
 from tests.support.helpers import document_hidden, is_fullscreen, is_maximized
 
diff --git a/tests/wpt/tests/webdriver/tests/classic/minimize_window/stress.py b/tests/wpt/tests/webdriver/tests/classic/minimize_window/stress.py
index 8990f12669d..f9c8304bdc0 100644
--- a/tests/wpt/tests/webdriver/tests/classic/minimize_window/stress.py
+++ b/tests/wpt/tests/webdriver/tests/classic/minimize_window/stress.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 import pytest
 
 from tests.support.asserts import assert_success
diff --git a/tests/wpt/tests/webdriver/tests/classic/perform_actions/invalid.py b/tests/wpt/tests/webdriver/tests/classic/perform_actions/invalid.py
index b0302131a0a..f000477376e 100644
--- a/tests/wpt/tests/webdriver/tests/classic/perform_actions/invalid.py
+++ b/tests/wpt/tests/webdriver/tests/classic/perform_actions/invalid.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 
 from webdriver.error import InvalidArgumentException
diff --git a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_mouse.py b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_mouse.py
index 914e9f65608..f8683ce4515 100644
--- a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_mouse.py
+++ b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_mouse.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 
 from webdriver.error import InvalidArgumentException, NoSuchWindowException, StaleElementReferenceException
diff --git a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_pen.py b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_pen.py
index b846f7e7ed5..bf71a20c4d2 100644
--- a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_pen.py
+++ b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_pen.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 
 from webdriver.error import NoSuchWindowException, StaleElementReferenceException
diff --git a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_touch.py b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_touch.py
index ab49f1eed6d..b85b2e6ef38 100644
--- a/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_touch.py
+++ b/tests/wpt/tests/webdriver/tests/classic/perform_actions/pointer_touch.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 import pytest
 
 from webdriver.error import NoSuchWindowException, StaleElementReferenceException
diff --git a/tests/wpt/tests/webdriver/tests/classic/perform_actions/sequence.py b/tests/wpt/tests/webdriver/tests/classic/perform_actions/sequence.py
index f6c12220c45..7751762768c 100644
--- a/tests/wpt/tests/webdriver/tests/classic/perform_actions/sequence.py
+++ b/tests/wpt/tests/webdriver/tests/classic/perform_actions/sequence.py
@@ -1,5 +1,3 @@
-# META: timeout=long
-
 from tests.classic.perform_actions.support.refine import get_events, get_keys
 
 
diff --git a/tests/wpt/tests/webdriver/tests/classic/release_actions/sequence.py b/tests/wpt/tests/webdriver/tests/classic/release_actions/sequence.py
index 65ad39fcbf7..348f8169460 100644
--- a/tests/wpt/tests/webdriver/tests/classic/release_actions/sequence.py
+++ b/tests/wpt/tests/webdriver/tests/classic/release_actions/sequence.py
@@ -1,4 +1,3 @@
-# META: timeout=long
 import pytest
 
 from tests.classic.release_actions.support.refine import get_events, get_keys
diff --git a/tests/wpt/tests/webdriver/tests/classic/set_window_rect/set.py b/tests/wpt/tests/webdriver/tests/classic/set_window_rect/set.py
index af37c2f70d3..5295c44fddb 100644
--- a/tests/wpt/tests/webdriver/tests/classic/set_window_rect/set.py
+++ b/tests/wpt/tests/webdriver/tests/classic/set_window_rect/set.py
@@ -1,5 +1,8 @@
 # META: timeout=long
 
+# Longer timeout required due to a bug in Chrome:
+# https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+
 import pytest
 
 from webdriver.transport import Response
diff --git a/tests/wpt/tests/webdriver/tests/support/fixtures.py b/tests/wpt/tests/webdriver/tests/support/fixtures.py
index d7ca4d0fab7..7468e8b251f 100644
--- a/tests/wpt/tests/webdriver/tests/support/fixtures.py
+++ b/tests/wpt/tests/webdriver/tests/support/fixtures.py
@@ -174,8 +174,12 @@ async def session(capabilities, configuration):
 
     # Enforce a fixed default window size and position
     if _current_session.capabilities.get("setWindowRect"):
-        _current_session.window.size = defaults.WINDOW_SIZE
-        _current_session.window.position = defaults.WINDOW_POSITION
+        # Only resize and reposition if needed to workaround a bug for Chrome:
+        # https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+        if _current_session.window.size != defaults.WINDOW_SIZE:
+            _current_session.window.size = defaults.WINDOW_SIZE
+        if _current_session.window.position != defaults.WINDOW_POSITION:
+            _current_session.window.position = defaults.WINDOW_POSITION
 
     # Set default timeouts
     multiplier = configuration["timeout_multiplier"]
@@ -222,8 +226,12 @@ async def bidi_session(capabilities, configuration):
 
     # Enforce a fixed default window size and position
     if _current_session.capabilities.get("setWindowRect"):
-        _current_session.window.size = defaults.WINDOW_SIZE
-        _current_session.window.position = defaults.WINDOW_POSITION
+        # Only resize and reposition if needed to workaround a bug for Chrome:
+        # https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+        if _current_session.window.size != defaults.WINDOW_SIZE:
+            _current_session.window.size = defaults.WINDOW_SIZE
+        if _current_session.window.position != defaults.WINDOW_POSITION:
+            _current_session.window.position = defaults.WINDOW_POSITION
 
     yield _current_session.bidi_session
 
diff --git a/tests/wpt/tests/webdriver/tests/support/helpers.py b/tests/wpt/tests/webdriver/tests/support/helpers.py
index dbc5abc2475..0a8e1dc1a4f 100644
--- a/tests/wpt/tests/webdriver/tests/support/helpers.py
+++ b/tests/wpt/tests/webdriver/tests/support/helpers.py
@@ -57,7 +57,10 @@ def cleanup_session(session):
         or fullscreened state.
         """
         if session.capabilities.get("setWindowRect"):
-            session.window.size = defaults.WINDOW_SIZE
+            # Only resize if needed to workaround a bug for Chrome:
+            # https://bugs.chromium.org/p/chromedriver/issues/detail?id=4642#c4
+            if session.window.size != defaults.WINDOW_SIZE:
+                session.window.size = defaults.WINDOW_SIZE
 
     @ignore_exceptions
     def _restore_windows(session):