diff --git a/tests/wpt/metadata-layout-2020/FileAPI/url/url-charset.window.js.ini b/tests/wpt/metadata-layout-2020/FileAPI/url/url-charset.window.js.ini
new file mode 100644
index 00000000000..33fc78f48d9
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/FileAPI/url/url-charset.window.js.ini
@@ -0,0 +1,7 @@
+[url-charset.window.html]
+  expected: TIMEOUT
+  [Blob charset should override any auto-detected charset.]
+    expected: TIMEOUT
+
+  [Blob charset should override <meta charset>.]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-004.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-004.html.ini
new file mode 100644
index 00000000000..13bd6abf376
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/floats/hit-test-floats-004.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-004.html]
+  [Miss float below something else]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini
deleted file mode 100644
index b4eea326212..00000000000
--- a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[block-in-inline-hittest-001.html]
-  [block-in-inline-hittest-001]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
index cdd8b55f192..f9e216a8cfc 100644
--- a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
@@ -1,3 +1,6 @@
 [block-in-inline-hittest-relpos-zindex.html]
   [position: relative; z-index: -1;]
     expected: FAIL
+
+  [block-in-inline-hittest-relpos-zindex]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini b/tests/wpt/metadata-layout-2020/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini
new file mode 100644
index 00000000000..783244409df
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini
@@ -0,0 +1,75 @@
+[webkit-border-radius-valid.html]
+  [e.style['-webkit-border-radius'\] = "initial" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "inherit" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "unset" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "revert" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 5%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px 4%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px / 2px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "5em / 1px 2% 3px 4%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% / 3px 4px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2px 3em / 1px 2px 3%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% / 2px 3em 4px 5em" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px 4% / 5em" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 1px 2% / 1px 2% 1px 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 1px 1px / 1px 1px 2% 1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 2% 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 1px 1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 2% 2% / 1px 2% 3px 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-top-left-radius'\] = "10px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-top-right-radius'\] = "20%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-bottom-right-radius'\] = "30px 40%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-bottom-left-radius'\] = "50% 60px" should set the property value]
+    expected: FAIL
+
+  [Serialize border-radius from -webkit-border-radius: 1px 2px]
+    expected: FAIL
+
+  [Serialize -webkit-border-radius from border-radius: 1px 2px]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-color/animation/color-interpolation.html.ini b/tests/wpt/metadata-layout-2020/css/css-color/animation/color-interpolation.html.ini
index da34b2048c1..d59eaeea327 100644
--- a/tests/wpt/metadata-layout-2020/css/css-color/animation/color-interpolation.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-color/animation/color-interpolation.html.ini
@@ -304,3 +304,147 @@
 
   [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(1.5 0 0)\]]
     expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-fonts/variations/at-font-face-font-matching.html.ini b/tests/wpt/metadata-layout-2020/css/css-fonts/variations/at-font-face-font-matching.html.ini
index 8c8a5bad065..c9a742b2bbb 100644
--- a/tests/wpt/metadata-layout-2020/css/css-fonts/variations/at-font-face-font-matching.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-fonts/variations/at-font-face-font-matching.html.ini
@@ -155,9 +155,6 @@
   [Matching font-style: 'oblique 21deg' should prefer 'oblique 10deg' over 'italic']
     expected: FAIL
 
-  [Matching font-style: 'oblique 21deg' should prefer 'italic' over 'oblique 0deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 21deg' should prefer 'oblique -50deg -20deg' over 'oblique -40deg -30deg']
     expected: FAIL
 
@@ -272,9 +269,6 @@
   [Matching font-weight: '501' should prefer '502 510' over '503 520']
     expected: FAIL
 
-  [Matching font-stretch: '110%' should prefer '105%' over '100%']
-    expected: FAIL
-
   [Matching font-style: 'normal' should prefer 'normal' over 'oblique 0deg']
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/css/css-images/parsing/gradient-interpolation-method-valid.html.ini b/tests/wpt/metadata-layout-2020/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
index b44a302ce26..7a6a405df4f 100644
--- a/tests/wpt/metadata-layout-2020/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
@@ -2779,3 +2779,1386 @@
 
   [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue at left 10px top 50em, color(srgb 1 0 0), blue)" should set the property value]
     expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50 to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65 to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50 from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50 at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65 from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65 at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-001.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-001.html.ini
index 233d4f39051..6eac2d016ea 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-001.html.ini
@@ -475,303 +475,3 @@
 
   [padding-bottom length(em) / values]
     expected: FAIL
-
-  [margin-right length(cm) / values]
-    expected: FAIL
-
-  [margin-right length(in) / values]
-    expected: FAIL
-
-  [margin-top length(pt) / values]
-    expected: FAIL
-
-  [margin-top length(pc) / values]
-    expected: FAIL
-
-  [margin-top length(px) / values]
-    expected: FAIL
-
-  [margin-top length(em) / values]
-    expected: FAIL
-
-  [margin-top length(ex) / values]
-    expected: FAIL
-
-  [margin-top length(mm) / values]
-    expected: FAIL
-
-  [margin-top length(cm) / values]
-    expected: FAIL
-
-  [margin-top length(in) / values]
-    expected: FAIL
-
-  [height length(pt) / values]
-    expected: FAIL
-
-  [height length(pc) / values]
-    expected: FAIL
-
-  [height length(px) / values]
-    expected: FAIL
-
-  [height length(em) / values]
-    expected: FAIL
-
-  [height length(ex) / values]
-    expected: FAIL
-
-  [height length(mm) / values]
-    expected: FAIL
-
-  [height length(cm) / values]
-    expected: FAIL
-
-  [height length(in) / values]
-    expected: FAIL
-
-  [height percentage(%) / values]
-    expected: FAIL
-
-  [width length(pt) / values]
-    expected: FAIL
-
-  [width length(pc) / values]
-    expected: FAIL
-
-  [width length(px) / values]
-    expected: FAIL
-
-  [width length(em) / values]
-    expected: FAIL
-
-  [width length(ex) / values]
-    expected: FAIL
-
-  [width length(mm) / values]
-    expected: FAIL
-
-  [width length(cm) / values]
-    expected: FAIL
-
-  [width length(in) / values]
-    expected: FAIL
-
-  [width percentage(%) / values]
-    expected: FAIL
-
-  [min-height length(pt) / values]
-    expected: FAIL
-
-  [min-height length(pc) / values]
-    expected: FAIL
-
-  [min-height length(px) / values]
-    expected: FAIL
-
-  [min-height length(em) / values]
-    expected: FAIL
-
-  [min-height length(ex) / values]
-    expected: FAIL
-
-  [min-height length(mm) / values]
-    expected: FAIL
-
-  [min-height length(cm) / values]
-    expected: FAIL
-
-  [min-height length(in) / values]
-    expected: FAIL
-
-  [min-height percentage(%) / values]
-    expected: FAIL
-
-  [min-width length(pt) / values]
-    expected: FAIL
-
-  [min-width length(pc) / values]
-    expected: FAIL
-
-  [min-width length(px) / values]
-    expected: FAIL
-
-  [min-width length(em) / values]
-    expected: FAIL
-
-  [min-width length(ex) / values]
-    expected: FAIL
-
-  [min-width length(mm) / values]
-    expected: FAIL
-
-  [min-width length(cm) / values]
-    expected: FAIL
-
-  [min-width length(in) / values]
-    expected: FAIL
-
-  [min-width percentage(%) / values]
-    expected: FAIL
-
-  [max-height length(pt) / values]
-    expected: FAIL
-
-  [max-height length(pc) / values]
-    expected: FAIL
-
-  [max-height length(px) / values]
-    expected: FAIL
-
-  [max-height length(em) / values]
-    expected: FAIL
-
-  [max-height length(ex) / values]
-    expected: FAIL
-
-  [max-height length(mm) / values]
-    expected: FAIL
-
-  [max-height length(cm) / values]
-    expected: FAIL
-
-  [max-height length(in) / values]
-    expected: FAIL
-
-  [max-height percentage(%) / values]
-    expected: FAIL
-
-  [max-width length(pt) / values]
-    expected: FAIL
-
-  [max-width length(pc) / values]
-    expected: FAIL
-
-  [max-width length(px) / values]
-    expected: FAIL
-
-  [max-width length(em) / values]
-    expected: FAIL
-
-  [max-width length(ex) / values]
-    expected: FAIL
-
-  [max-width length(mm) / values]
-    expected: FAIL
-
-  [max-width length(cm) / values]
-    expected: FAIL
-
-  [max-width length(in) / values]
-    expected: FAIL
-
-  [max-width percentage(%) / values]
-    expected: FAIL
-
-  [top length(pt) / values]
-    expected: FAIL
-
-  [top length(pc) / values]
-    expected: FAIL
-
-  [top length(px) / values]
-    expected: FAIL
-
-  [top length(em) / values]
-    expected: FAIL
-
-  [top length(ex) / values]
-    expected: FAIL
-
-  [top length(mm) / values]
-    expected: FAIL
-
-  [top length(cm) / values]
-    expected: FAIL
-
-  [top length(in) / values]
-    expected: FAIL
-
-  [top percentage(%) / values]
-    expected: FAIL
-
-  [right length(pt) / values]
-    expected: FAIL
-
-  [right length(pc) / values]
-    expected: FAIL
-
-  [right length(px) / values]
-    expected: FAIL
-
-  [right length(em) / values]
-    expected: FAIL
-
-  [right length(ex) / values]
-    expected: FAIL
-
-  [right length(mm) / values]
-    expected: FAIL
-
-  [right length(cm) / values]
-    expected: FAIL
-
-  [right length(in) / values]
-    expected: FAIL
-
-  [right percentage(%) / values]
-    expected: FAIL
-
-  [bottom length(pt) / values]
-    expected: FAIL
-
-  [bottom length(pc) / values]
-    expected: FAIL
-
-  [bottom length(px) / values]
-    expected: FAIL
-
-  [bottom length(em) / values]
-    expected: FAIL
-
-  [bottom length(ex) / values]
-    expected: FAIL
-
-  [bottom length(mm) / values]
-    expected: FAIL
-
-  [bottom length(cm) / values]
-    expected: FAIL
-
-  [bottom length(in) / values]
-    expected: FAIL
-
-  [bottom percentage(%) / values]
-    expected: FAIL
-
-  [left length(pt) / values]
-    expected: FAIL
-
-  [left length(pc) / values]
-    expected: FAIL
-
-  [left length(px) / values]
-    expected: FAIL
-
-  [left length(em) / values]
-    expected: FAIL
-
-  [left length(ex) / values]
-    expected: FAIL
-
-  [left length(mm) / values]
-    expected: FAIL
-
-  [left length(cm) / values]
-    expected: FAIL
-
-  [left length(in) / values]
-    expected: FAIL
-
-  [left percentage(%) / values]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-implicit-001.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-implicit-001.html.ini
index 3b9c47983b6..6fbb05ea694 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-implicit-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-implicit-001.html.ini
@@ -4,84 +4,3 @@
 
   [background-position length-em(em) / values]
     expected: FAIL
-
-  [border-top-width length-em(em) / values]
-    expected: FAIL
-
-  [border-right-width length-em(em) / values]
-    expected: FAIL
-
-  [border-bottom-width length-em(em) / values]
-    expected: FAIL
-
-  [border-left-width length-em(em) / values]
-    expected: FAIL
-
-  [padding-bottom length-em(em) / values]
-    expected: FAIL
-
-  [padding-left length-em(em) / values]
-    expected: FAIL
-
-  [padding-right length-em(em) / values]
-    expected: FAIL
-
-  [padding-top length-em(em) / values]
-    expected: FAIL
-
-  [margin-bottom length-em(em) / values]
-    expected: FAIL
-
-  [margin-left length-em(em) / values]
-    expected: FAIL
-
-  [margin-right length-em(em) / values]
-    expected: FAIL
-
-  [margin-top length-em(em) / values]
-    expected: FAIL
-
-  [height length-em(em) / values]
-    expected: FAIL
-
-  [width length-em(em) / values]
-    expected: FAIL
-
-  [min-height length-em(em) / values]
-    expected: FAIL
-
-  [min-width length-em(em) / values]
-    expected: FAIL
-
-  [max-height length-em(em) / values]
-    expected: FAIL
-
-  [max-width length-em(em) / values]
-    expected: FAIL
-
-  [right length-em(em) / values]
-    expected: FAIL
-
-  [left length-em(em) / values]
-    expected: FAIL
-
-  [line-height length-em(em) / values]
-    expected: FAIL
-
-  [letter-spacing length-em(em) / values]
-    expected: FAIL
-
-  [word-spacing length-em(em) / values]
-    expected: FAIL
-
-  [text-indent length-em(em) / values]
-    expected: FAIL
-
-  [outline-offset length-em(em) / values]
-    expected: FAIL
-
-  [outline-width length-em(em) / values]
-    expected: FAIL
-
-  [vertical-align length-em(em) / values]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
index b3362be9411..270150fa9f4 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
@@ -56,156 +56,6 @@
   [background-position length(px) / events]
     expected: FAIL
 
-  [color color(rgba) / events]
-    expected: FAIL
-
-  [font-size length(pt) / events]
-    expected: FAIL
-
-  [font-size length(pc) / events]
-    expected: FAIL
-
-  [font-size length(px) / events]
-    expected: FAIL
-
-  [font-size length(em) / events]
-    expected: FAIL
-
-  [font-size length(ex) / events]
-    expected: FAIL
-
-  [font-size length(mm) / events]
-    expected: FAIL
-
-  [font-size length(cm) / events]
-    expected: FAIL
-
-  [font-size length(in) / events]
-    expected: FAIL
-
-  [font-size percentage(%) / events]
-    expected: FAIL
-
-  [font-weight font-weight(keyword) / events]
-    expected: FAIL
-
-  [font-weight font-weight(numeric) / events]
-    expected: FAIL
-
-  [line-height number(integer) / events]
-    expected: FAIL
-
-  [line-height number(decimal) / events]
-    expected: FAIL
-
-  [line-height length(pt) / events]
-    expected: FAIL
-
-  [line-height length(pc) / events]
-    expected: FAIL
-
-  [line-height length(px) / events]
-    expected: FAIL
-
-  [line-height length(em) / events]
-    expected: FAIL
-
-  [line-height length(ex) / events]
-    expected: FAIL
-
-  [line-height length(mm) / events]
-    expected: FAIL
-
-  [line-height length(cm) / events]
-    expected: FAIL
-
-  [line-height length(in) / events]
-    expected: FAIL
-
-  [line-height percentage(%) / events]
-    expected: FAIL
-
-  [letter-spacing length(pt) / events]
-    expected: FAIL
-
-  [letter-spacing length(pc) / events]
-    expected: FAIL
-
-  [letter-spacing length(px) / events]
-    expected: FAIL
-
-  [letter-spacing length(em) / events]
-    expected: FAIL
-
-  [letter-spacing length(ex) / events]
-    expected: FAIL
-
-  [letter-spacing length(mm) / events]
-    expected: FAIL
-
-  [letter-spacing length(cm) / events]
-    expected: FAIL
-
-  [letter-spacing length(in) / events]
-    expected: FAIL
-
-  [word-spacing length(pt) / events]
-    expected: FAIL
-
-  [word-spacing length(pc) / events]
-    expected: FAIL
-
-  [word-spacing length(px) / events]
-    expected: FAIL
-
-  [word-spacing length(em) / events]
-    expected: FAIL
-
-  [word-spacing length(ex) / events]
-    expected: FAIL
-
-  [word-spacing length(mm) / events]
-    expected: FAIL
-
-  [word-spacing length(cm) / events]
-    expected: FAIL
-
-  [word-spacing length(in) / events]
-    expected: FAIL
-
-  [word-spacing percentage(%) / events]
-    expected: FAIL
-
-  [text-indent length(pt) / events]
-    expected: FAIL
-
-  [text-indent length(pc) / events]
-    expected: FAIL
-
-  [text-indent length(px) / events]
-    expected: FAIL
-
-  [text-indent length(em) / events]
-    expected: FAIL
-
-  [text-indent length(ex) / events]
-    expected: FAIL
-
-  [text-indent length(mm) / events]
-    expected: FAIL
-
-  [text-indent length(cm) / events]
-    expected: FAIL
-
-  [text-indent length(in) / events]
-    expected: FAIL
-
-  [text-indent percentage(%) / events]
-    expected: FAIL
-
-  [text-shadow shadow(shadow) / events]
-    expected: FAIL
-
   [background-color color(rgba) / events]
     expected: FAIL
 
@@ -478,153 +328,3 @@
 
   [margin-right length(mm) / events]
     expected: FAIL
-
-  [margin-right length(cm) / events]
-    expected: FAIL
-
-  [margin-right length(in) / events]
-    expected: FAIL
-
-  [margin-top length(pt) / events]
-    expected: FAIL
-
-  [margin-top length(pc) / events]
-    expected: FAIL
-
-  [margin-top length(px) / events]
-    expected: FAIL
-
-  [margin-top length(em) / events]
-    expected: FAIL
-
-  [margin-top length(ex) / events]
-    expected: FAIL
-
-  [margin-top length(mm) / events]
-    expected: FAIL
-
-  [margin-top length(cm) / events]
-    expected: FAIL
-
-  [margin-top length(in) / events]
-    expected: FAIL
-
-  [height length(pt) / events]
-    expected: FAIL
-
-  [height length(pc) / events]
-    expected: FAIL
-
-  [height length(px) / events]
-    expected: FAIL
-
-  [height length(em) / events]
-    expected: FAIL
-
-  [height length(ex) / events]
-    expected: FAIL
-
-  [height length(mm) / events]
-    expected: FAIL
-
-  [height length(cm) / events]
-    expected: FAIL
-
-  [height length(in) / events]
-    expected: FAIL
-
-  [height percentage(%) / events]
-    expected: FAIL
-
-  [width length(pt) / events]
-    expected: FAIL
-
-  [width length(pc) / events]
-    expected: FAIL
-
-  [width length(px) / events]
-    expected: FAIL
-
-  [width length(em) / events]
-    expected: FAIL
-
-  [width length(ex) / events]
-    expected: FAIL
-
-  [width length(mm) / events]
-    expected: FAIL
-
-  [width length(cm) / events]
-    expected: FAIL
-
-  [width length(in) / events]
-    expected: FAIL
-
-  [width percentage(%) / events]
-    expected: FAIL
-
-  [min-height length(pt) / events]
-    expected: FAIL
-
-  [min-height length(pc) / events]
-    expected: FAIL
-
-  [min-height length(px) / events]
-    expected: FAIL
-
-  [min-height length(em) / events]
-    expected: FAIL
-
-  [min-height length(ex) / events]
-    expected: FAIL
-
-  [min-height length(mm) / events]
-    expected: FAIL
-
-  [min-height length(cm) / events]
-    expected: FAIL
-
-  [min-height length(in) / events]
-    expected: FAIL
-
-  [min-height percentage(%) / events]
-    expected: FAIL
-
-  [min-width length(pt) / events]
-    expected: FAIL
-
-  [min-width length(pc) / events]
-    expected: FAIL
-
-  [min-width length(px) / events]
-    expected: FAIL
-
-  [min-width length(em) / events]
-    expected: FAIL
-
-  [min-width length(ex) / events]
-    expected: FAIL
-
-  [min-width length(mm) / events]
-    expected: FAIL
-
-  [min-width length(cm) / events]
-    expected: FAIL
-
-  [min-width length(in) / events]
-    expected: FAIL
-
-  [min-width percentage(%) / events]
-    expected: FAIL
-
-  [max-height length(pt) / events]
-    expected: FAIL
-
-  [max-height length(pc) / events]
-    expected: FAIL
-
-  [max-height length(px) / events]
-    expected: FAIL
-
-  [max-height length(em) / events]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-002.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-002.html.ini
index 793afafa0e8..a8b624d26cb 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-002.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-002.html.ini
@@ -53,129 +53,6 @@
   [background-position length(px) / events]
     expected: FAIL
 
-  [background-color color(rgba) / values]
-    expected: FAIL
-
-  [border-top-width length(pt) / values]
-    expected: FAIL
-
-  [border-top-width length(pc) / values]
-    expected: FAIL
-
-  [border-top-width length(px) / values]
-    expected: FAIL
-
-  [border-top-width length(em) / values]
-    expected: FAIL
-
-  [border-top-width length(ex) / values]
-    expected: FAIL
-
-  [border-top-width length(mm) / values]
-    expected: FAIL
-
-  [border-top-width length(cm) / values]
-    expected: FAIL
-
-  [border-top-width length(in) / values]
-    expected: FAIL
-
-  [border-right-width length(pt) / values]
-    expected: FAIL
-
-  [border-right-width length(pc) / values]
-    expected: FAIL
-
-  [border-right-width length(px) / values]
-    expected: FAIL
-
-  [border-right-width length(em) / values]
-    expected: FAIL
-
-  [border-right-width length(ex) / values]
-    expected: FAIL
-
-  [border-right-width length(mm) / values]
-    expected: FAIL
-
-  [border-right-width length(cm) / values]
-    expected: FAIL
-
-  [border-right-width length(in) / values]
-    expected: FAIL
-
-  [border-bottom-width length(pt) / values]
-    expected: FAIL
-
-  [border-bottom-width length(pc) / values]
-    expected: FAIL
-
-  [border-bottom-width length(px) / values]
-    expected: FAIL
-
-  [border-bottom-width length(em) / values]
-    expected: FAIL
-
-  [border-bottom-width length(ex) / values]
-    expected: FAIL
-
-  [border-bottom-width length(mm) / values]
-    expected: FAIL
-
-  [border-bottom-width length(cm) / values]
-    expected: FAIL
-
-  [border-bottom-width length(in) / values]
-    expected: FAIL
-
-  [border-left-width length(pt) / values]
-    expected: FAIL
-
-  [border-left-width length(pc) / values]
-    expected: FAIL
-
-  [border-left-width length(px) / values]
-    expected: FAIL
-
-  [border-left-width length(em) / values]
-    expected: FAIL
-
-  [border-left-width length(ex) / values]
-    expected: FAIL
-
-  [border-left-width length(mm) / values]
-    expected: FAIL
-
-  [border-left-width length(cm) / values]
-    expected: FAIL
-
-  [border-left-width length(in) / values]
-    expected: FAIL
-
-  [border-top-color color(rgba) / values]
-    expected: FAIL
-
-  [border-right-color color(rgba) / values]
-    expected: FAIL
-
-  [border-bottom-color color(rgba) / values]
-    expected: FAIL
-
-  [border-left-color color(rgba) / values]
-    expected: FAIL
-
-  [padding-bottom length(pt) / values]
-    expected: FAIL
-
-  [padding-bottom length(pc) / values]
-    expected: FAIL
-
-  [padding-bottom length(px) / values]
-    expected: FAIL
-
-  [padding-bottom length(em) / values]
-    expected: FAIL
-
   [color color(rgba) / values]
     expected: FAIL
 
@@ -325,3 +202,153 @@
 
   [text-shadow shadow(shadow) / values]
     expected: FAIL
+
+  [padding-bottom length(ex) / values]
+    expected: FAIL
+
+  [padding-bottom length(mm) / values]
+    expected: FAIL
+
+  [padding-bottom length(cm) / values]
+    expected: FAIL
+
+  [padding-bottom length(in) / values]
+    expected: FAIL
+
+  [padding-left length(pt) / values]
+    expected: FAIL
+
+  [padding-left length(pc) / values]
+    expected: FAIL
+
+  [padding-left length(px) / values]
+    expected: FAIL
+
+  [padding-left length(em) / values]
+    expected: FAIL
+
+  [padding-left length(ex) / values]
+    expected: FAIL
+
+  [padding-left length(mm) / values]
+    expected: FAIL
+
+  [padding-left length(cm) / values]
+    expected: FAIL
+
+  [padding-left length(in) / values]
+    expected: FAIL
+
+  [padding-right length(pt) / values]
+    expected: FAIL
+
+  [padding-right length(pc) / values]
+    expected: FAIL
+
+  [padding-right length(px) / values]
+    expected: FAIL
+
+  [padding-right length(em) / values]
+    expected: FAIL
+
+  [padding-right length(ex) / values]
+    expected: FAIL
+
+  [padding-right length(mm) / values]
+    expected: FAIL
+
+  [padding-right length(cm) / values]
+    expected: FAIL
+
+  [padding-right length(in) / values]
+    expected: FAIL
+
+  [padding-top length(pt) / values]
+    expected: FAIL
+
+  [padding-top length(pc) / values]
+    expected: FAIL
+
+  [padding-top length(px) / values]
+    expected: FAIL
+
+  [padding-top length(em) / values]
+    expected: FAIL
+
+  [padding-top length(ex) / values]
+    expected: FAIL
+
+  [padding-top length(mm) / values]
+    expected: FAIL
+
+  [padding-top length(cm) / values]
+    expected: FAIL
+
+  [padding-top length(in) / values]
+    expected: FAIL
+
+  [margin-bottom length(pt) / values]
+    expected: FAIL
+
+  [margin-bottom length(pc) / values]
+    expected: FAIL
+
+  [margin-bottom length(px) / values]
+    expected: FAIL
+
+  [margin-bottom length(em) / values]
+    expected: FAIL
+
+  [margin-bottom length(ex) / values]
+    expected: FAIL
+
+  [margin-bottom length(mm) / values]
+    expected: FAIL
+
+  [margin-bottom length(cm) / values]
+    expected: FAIL
+
+  [margin-bottom length(in) / values]
+    expected: FAIL
+
+  [margin-left length(pt) / values]
+    expected: FAIL
+
+  [margin-left length(pc) / values]
+    expected: FAIL
+
+  [margin-left length(px) / values]
+    expected: FAIL
+
+  [margin-left length(em) / values]
+    expected: FAIL
+
+  [margin-left length(ex) / values]
+    expected: FAIL
+
+  [margin-left length(mm) / values]
+    expected: FAIL
+
+  [margin-left length(cm) / values]
+    expected: FAIL
+
+  [margin-left length(in) / values]
+    expected: FAIL
+
+  [margin-right length(pt) / values]
+    expected: FAIL
+
+  [margin-right length(pc) / values]
+    expected: FAIL
+
+  [margin-right length(px) / values]
+    expected: FAIL
+
+  [margin-right length(em) / values]
+    expected: FAIL
+
+  [margin-right length(ex) / values]
+    expected: FAIL
+
+  [margin-right length(mm) / values]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-subpixel.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-subpixel.html.ini
new file mode 100644
index 00000000000..8f6f663ba61
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-subpixel.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-subpixel.html]
+  [Hit test top left corner of box]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
new file mode 100644
index 00000000000..a6bca7ac372
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-visibility-hidden-resizer.html]
+  [elementFromPoint on resizer area of an element with visibility:hidden]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
index 1bf6ea475bf..3ddd598f5c4 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
@@ -16,3 +16,6 @@
 
   [test the top of layer]
     expected: FAIL
+
+  [test some point of the element: top left corner]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/custom-elements/cross-realm-callback-report-exception.html.ini b/tests/wpt/metadata-layout-2020/custom-elements/cross-realm-callback-report-exception.html.ini
new file mode 100644
index 00000000000..3c0f593d09c
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/custom-elements/cross-realm-callback-report-exception.html.ini
@@ -0,0 +1,3 @@
+[cross-realm-callback-report-exception.html]
+  [constructor]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/dom/events/webkit-transition-end-event.html.ini b/tests/wpt/metadata-layout-2020/dom/events/webkit-transition-end-event.html.ini
index c7813a85d31..b7fe8688a23 100644
--- a/tests/wpt/metadata-layout-2020/dom/events/webkit-transition-end-event.html.ini
+++ b/tests/wpt/metadata-layout-2020/dom/events/webkit-transition-end-event.html.ini
@@ -1,5 +1,4 @@
 [webkit-transition-end-event.html]
-  expected: TIMEOUT
   [dispatchEvent of an transitionend event does not trigger a prefixed event handler or listener]
     expected: FAIL
 
@@ -13,7 +12,7 @@
     expected: FAIL
 
   [event types for prefixed and unprefixed transitionend event listeners should be named appropriately]
-    expected: NOTRUN
+    expected: FAIL
 
   [ontransitionend and onwebkittransitionend are not aliases]
     expected: FAIL
@@ -26,12 +25,3 @@
 
   [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: TIMEOUT
-
-  [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/metadata-layout-2020/fetch/content-length/parsing.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-length/parsing.window.js.ini
index ac656410273..e8237fbb8f9 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-length/parsing.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-length/parsing.window.js.ini
@@ -77,8 +77,5 @@
   [Input: "Content-Length: ". Expected: 42.]
     expected: FAIL
 
-  [Input: "Content-Length: 42\\r\\nContent-Length: 42". Expected: 42.]
-    expected: FAIL
-
-  [Input: "Content-Length: 30". Expected: 30.]
+  [Input: "Content-Length: 42,42". Expected: 42.]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
index d77a92f76a2..be7494e9c52 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
@@ -52,3 +52,6 @@
 
   [combined text/javascript ]
     expected: FAIL
+
+  [separate text/javascript x/x]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/metadata-layout-2020/fetch/metadata/generated/css-images.sub.tentative.html.ini
index f9de5391ad6..36a410bfecb 100644
--- a/tests/wpt/metadata-layout-2020/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -146,3 +146,6 @@
 
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
+
+  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
index ca1272c0009..12ead2b354f 100644
--- a/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -10,6 +10,3 @@
 
   [X-Content-Type-Options%3A%0D%0AX-Content-Type-Options%3A%20nosniff]
     expected: FAIL
-
-  [X-Content-Type-Options%3A%20%22nosniFF%22]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
index 856bb1c9901..5f9a07f92f0 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
@@ -1,10 +1,6 @@
 [iframe-src-aboutblank-navigate-immediately.html]
-  expected: TIMEOUT
   [Navigating to a different document with window.open]
     expected: FAIL
 
   [Navigating to a different document with form submission]
-    expected: TIMEOUT
-
-  [Navigating to a different document with link click]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index c07cbe00d9b..574b2fd8927 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -2,11 +2,8 @@
   [load & pageshow event do not fire on contentWindow of <iframe> element created with no src]
     expected: FAIL
 
-  [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?foo']
     expected: FAIL
 
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
+  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
index 324db3d9b35..5aef7ce66ce 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
@@ -10,3 +10,6 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
+
+  [load event does not fire on window.open('about:blank')]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 8ae58f9f1e2..78240a2f463 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -16,6 +16,3 @@
 
   [D83D DE0D set in href="" targeting a frame and clicked]
     expected: FAIL
-
-  [DE0D 0041 set in href="" targeting a frame and clicked]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
index 9eb22957864..27889a98fb5 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
@@ -1,7 +1,6 @@
 [navigate-to-unparseable-url.html]
-  expected: TIMEOUT
   [location.href setter throws a SyntaxError DOMException for unparseable URLs]
-    expected: TIMEOUT
+    expected: FAIL
 
   [<a> tag navigate fails for unparseable URLs]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini b/tests/wpt/metadata-layout-2020/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/metadata-layout-2020/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/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/metadata-layout-2020/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/metadata-layout-2020/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/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini b/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
index b680c14d61c..ddd65fdcec8 100644
--- a/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@@ -1,19 +1,15 @@
 [supported-elements.html]
-  expected: TIMEOUT
   [Contenteditable element should support autofocus]
     expected: FAIL
 
   [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: NOTRUN
+    expected: FAIL
 
   [Element with tabindex should support autofocus]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Area element should support autofocus]
-    expected: NOTRUN
+    expected: FAIL
 
   [Host element with delegatesFocus should support autofocus]
-    expected: NOTRUN
-
-  [Non-HTMLElement should not support autofocus]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini
new file mode 100644
index 00000000000..f70b3854c56
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini
@@ -0,0 +1,3 @@
+[toBlob-cross-realm-callback-report-exception.html]
+  [toBlob() reports the exception from its callback in the callback's global object]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini
new file mode 100644
index 00000000000..ee35b2ec56d
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini
@@ -0,0 +1,3 @@
+[embed-svg-navigation-resets-size.html]
+  [Intrinsic sizing of SVG embedded via <embed> should disappear on navigation]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 7d28d586f51..24903b5f66f 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,3 +1,4 @@
 [iframe_sandbox_popups_escaping-1.html]
+  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/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 6a420504feb..7da2bc5ac80 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,3 +1,4 @@
 [iframe_sandbox_popups_escaping-3.html]
+  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/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index d5fd800f09d..653c5e98f2f 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,4 +1,4 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
index 31745fdcdcf..31928ad3947 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
@@ -1,4 +1,5 @@
 [sandbox-top-navigation-child-special-cases.tentative.sub.window.html]
+  expected: TIMEOUT
   [Allow top with user activation + user activation]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index 3cdeb8ebcbc..47b45e65a1c 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,3 +1,9 @@
 [non-active-document.html]
   [DOMParser]
     expected: FAIL
+
+  [createHTMLDocument]
+    expected: FAIL
+
+  [<template>]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
index 9101c169754..f10b4ec208d 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
@@ -175,6 +175,3 @@
 
   [multipart/form-data: character not in encoding in filename (formdata event)]
     expected: FAIL
-
-  [multipart/form-data: Basic test (formdata event)]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
index 90317c9bf28..dcd52d2fee8 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
@@ -1,13 +1,12 @@
 [htmlanchorelement_noopener.html]
-  expected: TIMEOUT
   [Check that targeting of rel=noopener with a given name reuses an existing window with that name]
     expected: FAIL
 
   [Check that rel=noopener with target=_top does a normal load]
-    expected: NOTRUN
+    expected: FAIL
 
   [Check that rel=noopener with target=_parent does a normal load]
-    expected: NOTRUN
+    expected: FAIL
 
   [Check that rel=noopener with target=_self does a normal load]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata-layout-2020/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..b8bdf33cb65
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/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/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
new file mode 100644
index 00000000000..53acb938c1b
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
@@ -0,0 +1,3 @@
+[module-static-import-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/metadata-layout-2020/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/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/metadata-layout-2020/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/metadata-layout-2020/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
index 4a48dd15a9d..1d71471b73c 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
@@ -1,6 +1,7 @@
 [promise-rejection-events.html]
+  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: FAIL
+    expected: TIMEOUT
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini b/tests/wpt/metadata-layout-2020/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini
new file mode 100644
index 00000000000..d37c885d391
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini
@@ -0,0 +1,3 @@
+[observable-array-no-leak-of-internals.window.html]
+  [ObservableArray's internals won't leak]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini
new file mode 100644
index 00000000000..c7946fc91b4
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini
@@ -0,0 +1,4 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/without-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/webmessaging/without-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/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
deleted file mode 100644
index 80f9a4f15b8..00000000000
--- a/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[Worker-constructor.html]
-  expected: ERROR
diff --git a/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini
new file mode 100644
index 00000000000..33fc78f48d9
--- /dev/null
+++ b/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini
@@ -0,0 +1,7 @@
+[url-charset.window.html]
+  expected: TIMEOUT
+  [Blob charset should override any auto-detected charset.]
+    expected: TIMEOUT
+
+  [Blob charset should override <meta charset>.]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index cef2f4b64a0..fb935fd3699 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -136393,7 +136393,7 @@
       ]
      ],
      "fieldset-002.html": [
-      "aea8cec5d432e33fb86165f6db10a11c0929e8c1",
+      "9331b81b11979d562da007dae98a7af0f8f184a4",
       [
        null,
        [
@@ -136406,7 +136406,7 @@
       ]
      ],
      "fieldset-003.html": [
-      "6c23a4b93e4233c40d97347d4189583eeb49c9b4",
+      "dbf69a403481124f3b1022f1470c14eae789f888",
       [
        null,
        [
@@ -136419,7 +136419,7 @@
       ]
      ],
      "fieldset-004.html": [
-      "ce832f82985383bd30389a0555b3864d11c32e17",
+      "4b49e6a594636a405d9f7037779e385cd0c73d9b",
       [
        null,
        [
@@ -191322,6 +191322,32 @@
         ],
         {}
        ]
+      ],
+      "initial-letter-with-tab-rtl.html": [
+       "f8a2d7a2a1cbc48e5a7fc52637a1f7cab6b5ea46",
+       [
+        null,
+        [
+         [
+          "/css/css-inline/initial-letter/initial-letter-with-tab-rtl-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "initial-letter-with-tab.html": [
+       "49b1f6b4b0e2a5c85ba7d89a2d7b46a4bcfee611",
+       [
+        null,
+        [
+         [
+          "/css/css-inline/initial-letter/initial-letter-with-tab-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
       ]
      }
     },
@@ -199276,7 +199302,7 @@
     },
     "css-multicol": {
      "abspos-after-spanner-static-pos.html": [
-      "9b2b996233c6a31c63471a41307f3c833a74abef",
+      "d257016a2519c6c30a0c352f4bd453822c89841b",
       [
        null,
        [
@@ -199289,7 +199315,7 @@
       ]
      ],
      "abspos-after-spanner.html": [
-      "caed4169757c604b51db18ae94cc2e02c349da1f",
+      "98664b50cc144adf01817e98fe844d68d877dbe9",
       [
        null,
        [
@@ -199328,7 +199354,7 @@
       ]
      ],
      "abspos-containing-block-outside-spanner.html": [
-      "ed832d39f621322064c3b6c3da390809d9cab7d5",
+      "1f0419d9c982588a93ad981656ca1271144756dd",
       [
        null,
        [
@@ -266962,7 +266988,7 @@
       ]
      },
      "compute-kind-widget-no-fallback-props-001.html": [
-      "e688ab8a9d91b910fba31964874bba336bf91ff7",
+      "0533da654ff80145e5706bbd5e0fc048d9b49cbb",
       [
        null,
        [
@@ -281666,6 +281692,32 @@
         {}
        ]
       ],
+      "meter-appearance-native-horizontal.optional.html": [
+       "7b25e1a9000d6c611c62c770871b7e32e4f8c696",
+       [
+        null,
+        [
+         [
+          "/css/css-writing-modes/forms/meter-appearance-native-vertical.optional.html",
+          "!="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "meter-appearance-native-vertical.optional.html": [
+       "6beca6bfa152a7799a6eb60940679959087fb762",
+       [
+        null,
+        [
+         [
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        {}
       ]
      ],
      "referrer-policy-from-rules.https.html": [
-      "01e32ba1400d45e9462f692b5cd207da9335cb98",
+      "ce3db0f999ac5db488a845370d6020c54d8d71c0",
       [
        "speculation-rules/prefetch/referrer-policy-from-rules.https.html?1-1",
        {}
@@ -648641,7 +648855,11 @@
        {}
       ],
       [
-       "speculation-rules/prefetch/referrer-policy-from-rules.https.html?5-last",
+       "speculation-rules/prefetch/referrer-policy-from-rules.https.html?5-5",
+       {}
+      ],
+      [
+       "speculation-rules/prefetch/referrer-policy-from-rules.https.html?6-last",
        {}
       ]
      ],
@@ -648653,7 +648871,7 @@
       ]
      ],
      "referrer-policy.https.html": [
-      "aaeae161e3ce0797ac5f2dde3d5ce9015d69cab6",
+      "1987d2e2ff439d6a8f4458b394a11fe3d2913715",
       [
        "speculation-rules/prefetch/referrer-policy.https.html?1-1",
        {}
@@ -648663,7 +648881,11 @@
        {}
       ],
       [
-       "speculation-rules/prefetch/referrer-policy.https.html?3-last",
+       "speculation-rules/prefetch/referrer-policy.https.html?3-3",
+       {}
+      ],
+      [
+       "speculation-rules/prefetch/referrer-policy.https.html?4-last",
        {}
       ]
      ],
@@ -648960,18 +649182,66 @@
       ]
      ],
      "response-code-non-successful.html": [
-      "00701f1471e57cf6cec6dd57747554f4b20c0c78",
+      "149971719cca8f842956967eb501aea310d0fdd2",
       [
-       null,
+       "speculation-rules/prerender/response-code-non-successful.html?code=204",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-non-successful.html?code=205",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-non-successful.html?code=402",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-non-successful.html?code=404",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-non-successful.html?code=500",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-non-successful.html?code=503",
        {
         "timeout": "long"
        }
       ]
      ],
      "response-code-successful.html": [
-      "cc70b8c641dfc9d09d79feaaeccb871da5ed9095",
+      "adf8a8932f71b5e34008c4ce47674b886fc40ed9",
       [
-       null,
+       "speculation-rules/prerender/response-code-successful.html?code=200",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-successful.html?code=201",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-successful.html?code=202",
+       {
+        "timeout": "long"
+       }
+      ],
+      [
+       "speculation-rules/prerender/response-code-successful.html?code=203",
        {
         "timeout": "long"
        }
@@ -658630,22 +658900,18 @@
         {}
        ]
       ]
-     },
-     "submissions": {
-      "Microsoft": {
-       "converted": {
-        "EventListener.dispatch.new.event.html": [
-         "e0ab7e0d3e417cd4595d7590d9d12d6d25bbc366",
-         [
-          null,
-          {}
-         ]
-        ]
-       }
-      }
      }
     },
     "mouse": {
+     "attributes.html": [
+      "bbc388445c052293091739db39719d5e3a27e1a5",
+      [
+       null,
+       {
+        "testdriver": true
+       }
+      ]
+     ],
      "cancel-mousedown-in-subframe.html": [
       "07350377354cda3c3fbafada0ff67700d01d06a0",
       [
@@ -668246,7 +668512,7 @@
      ]
     ],
     "disabled-by-permissions-policy-cross-origin.https.sub.html": [
-     "785624198414abe2eeb7a7941e3601e8aa461f5e",
+     "773da84c0c5bdd068b3a6a103f6f218270851f5b",
      [
       null,
       {}
@@ -674037,6 +674303,13 @@
        {}
       ]
      ],
+     "observable-array-no-leak-of-internals.window.js": [
+      "f93464005d017f6af716bdf66b85834be13012ce",
+      [
+       "webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.html",
+       {}
+      ]
+     ],
      "observable-array-ownkeys.window.js": [
       "29b537c4750a385f0000636e79c1c31126be5d5c",
       [
@@ -676761,6 +677034,15 @@
       }
      ]
     ],
+    "RTCEncodedVideoFrame-clone.https.html": [
+     "29330729dcc778e0b0f816a6999aee25cdc6a424",
+     [
+      null,
+      {
+       "testdriver": true
+      }
+     ]
+    ],
     "RTCEncodedVideoFrame-serviceworker-failure.https.html": [
      "b95c673f41eaa0fe91b5ea54063bef58550ab520",
      [
@@ -722414,14 +722696,14 @@
        ]
       ],
       "new_tab.py": [
-       "270e4b51b88fba539616859efb8a922cc0cecb36",
+       "f6cacf3c3586bc2962e67be4cacf3fbbc838216d",
        [
         null,
         {}
        ]
       ],
       "new_window.py": [
-       "d3c224502704eff04975f0dbe800a929d819de46",
+       "a3fce364ccc8ac8e7de942d4718a6eda151464f9",
        [
         null,
         {}
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
new file mode 100644
index 00000000000..13bd6abf376
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-004.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-004.html]
+  [Miss float below something else]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini
deleted file mode 100644
index b4eea326212..00000000000
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-001.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[block-in-inline-hittest-001.html]
-  [block-in-inline-hittest-001]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
index cdd8b55f192..f9e216a8cfc 100644
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
+++ b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
@@ -1,3 +1,6 @@
 [block-in-inline-hittest-relpos-zindex.html]
   [position: relative; z-index: -1;]
     expected: FAIL
+
+  [block-in-inline-hittest-relpos-zindex]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini b/tests/wpt/metadata/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini
new file mode 100644
index 00000000000..783244409df
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/parsing/webkit-border-radius-valid.html.ini
@@ -0,0 +1,75 @@
+[webkit-border-radius-valid.html]
+  [e.style['-webkit-border-radius'\] = "initial" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "inherit" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "unset" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "revert" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 5%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px 4%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px / 2px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "5em / 1px 2% 3px 4%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% / 3px 4px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2px 3em / 1px 2px 3%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% / 2px 3em 4px 5em" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 3px 4% / 5em" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 1px 2% / 1px 2% 1px 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 1px 1px / 1px 1px 2% 1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 1px 2% 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 1px 1px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-radius'\] = "1px 2% 2% 2% / 1px 2% 3px 2%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-top-left-radius'\] = "10px" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-top-right-radius'\] = "20%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-bottom-right-radius'\] = "30px 40%" should set the property value]
+    expected: FAIL
+
+  [e.style['-webkit-border-bottom-left-radius'\] = "50% 60px" should set the property value]
+    expected: FAIL
+
+  [Serialize border-radius from -webkit-border-radius: 1px 2px]
+    expected: FAIL
+
+  [Serialize -webkit-border-radius from border-radius: 1px 2px]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-color/animation/color-interpolation.html.ini b/tests/wpt/metadata/css/css-color/animation/color-interpolation.html.ini
index 3ad928d1643..cb4cec9128b 100644
--- a/tests/wpt/metadata/css/css-color/animation/color-interpolation.html.ini
+++ b/tests/wpt/metadata/css/css-color/animation/color-interpolation.html.ini
@@ -307,3 +307,147 @@
 
   [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(1.5 0 0)\]]
     expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [rgb(0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [rgb(255 255 255)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Transitions with transition: all: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [CSS Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.3) should be [oklab(30 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (0.6) should be [oklab(60 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1) should be [oklab(100 0 0)\]]
+    expected: FAIL
+
+  [Web Animations: property <color> from [color(srgb 0 0 0)\] to [color(srgb 1 1 1)\] at (1.5) should be [oklab(150 0 0)\]]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
index 71a94f4cfe0..aab449d2d00 100644
--- a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
@@ -44,9 +44,6 @@
   [Matching font-style: 'oblique 21deg' should prefer 'oblique 10deg' over 'italic']
     expected: FAIL
 
-  [Matching font-style: 'oblique 21deg' should prefer 'italic' over 'oblique 0deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 21deg' should prefer 'oblique -50deg -20deg' over 'oblique -40deg -30deg']
     expected: FAIL
 
@@ -281,9 +278,6 @@
   [Matching font-weight: '501' should prefer '502 510' over '503 520']
     expected: FAIL
 
-  [Matching font-stretch: '110%' should prefer '105%' over '100%']
-    expected: FAIL
-
   [Matching font-style: 'normal' should prefer 'normal' over 'oblique 0deg']
     expected: FAIL
 
diff --git a/tests/wpt/metadata/css/css-images/parsing/gradient-interpolation-method-valid.html.ini b/tests/wpt/metadata/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
index b44a302ce26..7a6a405df4f 100644
--- a/tests/wpt/metadata/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
+++ b/tests/wpt/metadata/css/css-images/parsing/gradient-interpolation-method-valid.html.ini
@@ -2779,3 +2779,1386 @@
 
   [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue at left 10px top 50em, color(srgb 1 0 0), blue)" should set the property value]
     expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lab to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklab to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in srgb-linear to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d50 to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in xyz-d65 to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hsl decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in hwb decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in lch decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch shorter hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch longer hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch increasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(30deg in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(to right bottom in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "linear-gradient(in oklch decreasing hue to right bottom, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lab at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklab at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in srgb-linear at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d50 at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in xyz-d65 at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hsl decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in hwb decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in lch decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch shorter hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch longer hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch increasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(50px in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue 50px, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(ellipse 50% 40em in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue ellipse 50% 40em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(at right center in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "radial-gradient(in oklch decreasing hue at right center, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lab at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklab, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklab at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in srgb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in srgb-linear, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in srgb-linear at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50 from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz-d50, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d50 at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65 from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in xyz-d65, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in xyz-d65 at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hsl decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hsl decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in hwb decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in hwb decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in lch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in lch decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch shorter hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch shorter hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch longer hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch longer hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch increasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch increasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(from 30deg in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue from 30deg, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(at left 10px top 50em in oklch decreasing hue, red, 50%, blue)" should set the property value]
+    expected: FAIL
+
+  [e.style['background-image'\] = "conic-gradient(in oklch decreasing hue at left 10px top 50em, red, 50%, blue)" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
index 233d4f39051..6eac2d016ea 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-001.html.ini
@@ -475,303 +475,3 @@
 
   [padding-bottom length(em) / values]
     expected: FAIL
-
-  [margin-right length(cm) / values]
-    expected: FAIL
-
-  [margin-right length(in) / values]
-    expected: FAIL
-
-  [margin-top length(pt) / values]
-    expected: FAIL
-
-  [margin-top length(pc) / values]
-    expected: FAIL
-
-  [margin-top length(px) / values]
-    expected: FAIL
-
-  [margin-top length(em) / values]
-    expected: FAIL
-
-  [margin-top length(ex) / values]
-    expected: FAIL
-
-  [margin-top length(mm) / values]
-    expected: FAIL
-
-  [margin-top length(cm) / values]
-    expected: FAIL
-
-  [margin-top length(in) / values]
-    expected: FAIL
-
-  [height length(pt) / values]
-    expected: FAIL
-
-  [height length(pc) / values]
-    expected: FAIL
-
-  [height length(px) / values]
-    expected: FAIL
-
-  [height length(em) / values]
-    expected: FAIL
-
-  [height length(ex) / values]
-    expected: FAIL
-
-  [height length(mm) / values]
-    expected: FAIL
-
-  [height length(cm) / values]
-    expected: FAIL
-
-  [height length(in) / values]
-    expected: FAIL
-
-  [height percentage(%) / values]
-    expected: FAIL
-
-  [width length(pt) / values]
-    expected: FAIL
-
-  [width length(pc) / values]
-    expected: FAIL
-
-  [width length(px) / values]
-    expected: FAIL
-
-  [width length(em) / values]
-    expected: FAIL
-
-  [width length(ex) / values]
-    expected: FAIL
-
-  [width length(mm) / values]
-    expected: FAIL
-
-  [width length(cm) / values]
-    expected: FAIL
-
-  [width length(in) / values]
-    expected: FAIL
-
-  [width percentage(%) / values]
-    expected: FAIL
-
-  [min-height length(pt) / values]
-    expected: FAIL
-
-  [min-height length(pc) / values]
-    expected: FAIL
-
-  [min-height length(px) / values]
-    expected: FAIL
-
-  [min-height length(em) / values]
-    expected: FAIL
-
-  [min-height length(ex) / values]
-    expected: FAIL
-
-  [min-height length(mm) / values]
-    expected: FAIL
-
-  [min-height length(cm) / values]
-    expected: FAIL
-
-  [min-height length(in) / values]
-    expected: FAIL
-
-  [min-height percentage(%) / values]
-    expected: FAIL
-
-  [min-width length(pt) / values]
-    expected: FAIL
-
-  [min-width length(pc) / values]
-    expected: FAIL
-
-  [min-width length(px) / values]
-    expected: FAIL
-
-  [min-width length(em) / values]
-    expected: FAIL
-
-  [min-width length(ex) / values]
-    expected: FAIL
-
-  [min-width length(mm) / values]
-    expected: FAIL
-
-  [min-width length(cm) / values]
-    expected: FAIL
-
-  [min-width length(in) / values]
-    expected: FAIL
-
-  [min-width percentage(%) / values]
-    expected: FAIL
-
-  [max-height length(pt) / values]
-    expected: FAIL
-
-  [max-height length(pc) / values]
-    expected: FAIL
-
-  [max-height length(px) / values]
-    expected: FAIL
-
-  [max-height length(em) / values]
-    expected: FAIL
-
-  [max-height length(ex) / values]
-    expected: FAIL
-
-  [max-height length(mm) / values]
-    expected: FAIL
-
-  [max-height length(cm) / values]
-    expected: FAIL
-
-  [max-height length(in) / values]
-    expected: FAIL
-
-  [max-height percentage(%) / values]
-    expected: FAIL
-
-  [max-width length(pt) / values]
-    expected: FAIL
-
-  [max-width length(pc) / values]
-    expected: FAIL
-
-  [max-width length(px) / values]
-    expected: FAIL
-
-  [max-width length(em) / values]
-    expected: FAIL
-
-  [max-width length(ex) / values]
-    expected: FAIL
-
-  [max-width length(mm) / values]
-    expected: FAIL
-
-  [max-width length(cm) / values]
-    expected: FAIL
-
-  [max-width length(in) / values]
-    expected: FAIL
-
-  [max-width percentage(%) / values]
-    expected: FAIL
-
-  [top length(pt) / values]
-    expected: FAIL
-
-  [top length(pc) / values]
-    expected: FAIL
-
-  [top length(px) / values]
-    expected: FAIL
-
-  [top length(em) / values]
-    expected: FAIL
-
-  [top length(ex) / values]
-    expected: FAIL
-
-  [top length(mm) / values]
-    expected: FAIL
-
-  [top length(cm) / values]
-    expected: FAIL
-
-  [top length(in) / values]
-    expected: FAIL
-
-  [top percentage(%) / values]
-    expected: FAIL
-
-  [right length(pt) / values]
-    expected: FAIL
-
-  [right length(pc) / values]
-    expected: FAIL
-
-  [right length(px) / values]
-    expected: FAIL
-
-  [right length(em) / values]
-    expected: FAIL
-
-  [right length(ex) / values]
-    expected: FAIL
-
-  [right length(mm) / values]
-    expected: FAIL
-
-  [right length(cm) / values]
-    expected: FAIL
-
-  [right length(in) / values]
-    expected: FAIL
-
-  [right percentage(%) / values]
-    expected: FAIL
-
-  [bottom length(pt) / values]
-    expected: FAIL
-
-  [bottom length(pc) / values]
-    expected: FAIL
-
-  [bottom length(px) / values]
-    expected: FAIL
-
-  [bottom length(em) / values]
-    expected: FAIL
-
-  [bottom length(ex) / values]
-    expected: FAIL
-
-  [bottom length(mm) / values]
-    expected: FAIL
-
-  [bottom length(cm) / values]
-    expected: FAIL
-
-  [bottom length(in) / values]
-    expected: FAIL
-
-  [bottom percentage(%) / values]
-    expected: FAIL
-
-  [left length(pt) / values]
-    expected: FAIL
-
-  [left length(pc) / values]
-    expected: FAIL
-
-  [left length(px) / values]
-    expected: FAIL
-
-  [left length(em) / values]
-    expected: FAIL
-
-  [left length(ex) / values]
-    expected: FAIL
-
-  [left length(mm) / values]
-    expected: FAIL
-
-  [left length(cm) / values]
-    expected: FAIL
-
-  [left length(in) / values]
-    expected: FAIL
-
-  [left percentage(%) / values]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-implicit-001.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-implicit-001.html.ini
index 3b9c47983b6..6fbb05ea694 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-implicit-001.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-implicit-001.html.ini
@@ -4,84 +4,3 @@
 
   [background-position length-em(em) / values]
     expected: FAIL
-
-  [border-top-width length-em(em) / values]
-    expected: FAIL
-
-  [border-right-width length-em(em) / values]
-    expected: FAIL
-
-  [border-bottom-width length-em(em) / values]
-    expected: FAIL
-
-  [border-left-width length-em(em) / values]
-    expected: FAIL
-
-  [padding-bottom length-em(em) / values]
-    expected: FAIL
-
-  [padding-left length-em(em) / values]
-    expected: FAIL
-
-  [padding-right length-em(em) / values]
-    expected: FAIL
-
-  [padding-top length-em(em) / values]
-    expected: FAIL
-
-  [margin-bottom length-em(em) / values]
-    expected: FAIL
-
-  [margin-left length-em(em) / values]
-    expected: FAIL
-
-  [margin-right length-em(em) / values]
-    expected: FAIL
-
-  [margin-top length-em(em) / values]
-    expected: FAIL
-
-  [height length-em(em) / values]
-    expected: FAIL
-
-  [width length-em(em) / values]
-    expected: FAIL
-
-  [min-height length-em(em) / values]
-    expected: FAIL
-
-  [min-width length-em(em) / values]
-    expected: FAIL
-
-  [max-height length-em(em) / values]
-    expected: FAIL
-
-  [max-width length-em(em) / values]
-    expected: FAIL
-
-  [right length-em(em) / values]
-    expected: FAIL
-
-  [left length-em(em) / values]
-    expected: FAIL
-
-  [line-height length-em(em) / values]
-    expected: FAIL
-
-  [letter-spacing length-em(em) / values]
-    expected: FAIL
-
-  [word-spacing length-em(em) / values]
-    expected: FAIL
-
-  [text-indent length-em(em) / values]
-    expected: FAIL
-
-  [outline-offset length-em(em) / values]
-    expected: FAIL
-
-  [outline-width length-em(em) / values]
-    expected: FAIL
-
-  [vertical-align length-em(em) / values]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
index b3362be9411..270150fa9f4 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-001.html.ini
@@ -56,156 +56,6 @@
   [background-position length(px) / events]
     expected: FAIL
 
-  [color color(rgba) / events]
-    expected: FAIL
-
-  [font-size length(pt) / events]
-    expected: FAIL
-
-  [font-size length(pc) / events]
-    expected: FAIL
-
-  [font-size length(px) / events]
-    expected: FAIL
-
-  [font-size length(em) / events]
-    expected: FAIL
-
-  [font-size length(ex) / events]
-    expected: FAIL
-
-  [font-size length(mm) / events]
-    expected: FAIL
-
-  [font-size length(cm) / events]
-    expected: FAIL
-
-  [font-size length(in) / events]
-    expected: FAIL
-
-  [font-size percentage(%) / events]
-    expected: FAIL
-
-  [font-weight font-weight(keyword) / events]
-    expected: FAIL
-
-  [font-weight font-weight(numeric) / events]
-    expected: FAIL
-
-  [line-height number(integer) / events]
-    expected: FAIL
-
-  [line-height number(decimal) / events]
-    expected: FAIL
-
-  [line-height length(pt) / events]
-    expected: FAIL
-
-  [line-height length(pc) / events]
-    expected: FAIL
-
-  [line-height length(px) / events]
-    expected: FAIL
-
-  [line-height length(em) / events]
-    expected: FAIL
-
-  [line-height length(ex) / events]
-    expected: FAIL
-
-  [line-height length(mm) / events]
-    expected: FAIL
-
-  [line-height length(cm) / events]
-    expected: FAIL
-
-  [line-height length(in) / events]
-    expected: FAIL
-
-  [line-height percentage(%) / events]
-    expected: FAIL
-
-  [letter-spacing length(pt) / events]
-    expected: FAIL
-
-  [letter-spacing length(pc) / events]
-    expected: FAIL
-
-  [letter-spacing length(px) / events]
-    expected: FAIL
-
-  [letter-spacing length(em) / events]
-    expected: FAIL
-
-  [letter-spacing length(ex) / events]
-    expected: FAIL
-
-  [letter-spacing length(mm) / events]
-    expected: FAIL
-
-  [letter-spacing length(cm) / events]
-    expected: FAIL
-
-  [letter-spacing length(in) / events]
-    expected: FAIL
-
-  [word-spacing length(pt) / events]
-    expected: FAIL
-
-  [word-spacing length(pc) / events]
-    expected: FAIL
-
-  [word-spacing length(px) / events]
-    expected: FAIL
-
-  [word-spacing length(em) / events]
-    expected: FAIL
-
-  [word-spacing length(ex) / events]
-    expected: FAIL
-
-  [word-spacing length(mm) / events]
-    expected: FAIL
-
-  [word-spacing length(cm) / events]
-    expected: FAIL
-
-  [word-spacing length(in) / events]
-    expected: FAIL
-
-  [word-spacing percentage(%) / events]
-    expected: FAIL
-
-  [text-indent length(pt) / events]
-    expected: FAIL
-
-  [text-indent length(pc) / events]
-    expected: FAIL
-
-  [text-indent length(px) / events]
-    expected: FAIL
-
-  [text-indent length(em) / events]
-    expected: FAIL
-
-  [text-indent length(ex) / events]
-    expected: FAIL
-
-  [text-indent length(mm) / events]
-    expected: FAIL
-
-  [text-indent length(cm) / events]
-    expected: FAIL
-
-  [text-indent length(in) / events]
-    expected: FAIL
-
-  [text-indent percentage(%) / events]
-    expected: FAIL
-
-  [text-shadow shadow(shadow) / events]
-    expected: FAIL
-
   [background-color color(rgba) / events]
     expected: FAIL
 
@@ -478,153 +328,3 @@
 
   [margin-right length(mm) / events]
     expected: FAIL
-
-  [margin-right length(cm) / events]
-    expected: FAIL
-
-  [margin-right length(in) / events]
-    expected: FAIL
-
-  [margin-top length(pt) / events]
-    expected: FAIL
-
-  [margin-top length(pc) / events]
-    expected: FAIL
-
-  [margin-top length(px) / events]
-    expected: FAIL
-
-  [margin-top length(em) / events]
-    expected: FAIL
-
-  [margin-top length(ex) / events]
-    expected: FAIL
-
-  [margin-top length(mm) / events]
-    expected: FAIL
-
-  [margin-top length(cm) / events]
-    expected: FAIL
-
-  [margin-top length(in) / events]
-    expected: FAIL
-
-  [height length(pt) / events]
-    expected: FAIL
-
-  [height length(pc) / events]
-    expected: FAIL
-
-  [height length(px) / events]
-    expected: FAIL
-
-  [height length(em) / events]
-    expected: FAIL
-
-  [height length(ex) / events]
-    expected: FAIL
-
-  [height length(mm) / events]
-    expected: FAIL
-
-  [height length(cm) / events]
-    expected: FAIL
-
-  [height length(in) / events]
-    expected: FAIL
-
-  [height percentage(%) / events]
-    expected: FAIL
-
-  [width length(pt) / events]
-    expected: FAIL
-
-  [width length(pc) / events]
-    expected: FAIL
-
-  [width length(px) / events]
-    expected: FAIL
-
-  [width length(em) / events]
-    expected: FAIL
-
-  [width length(ex) / events]
-    expected: FAIL
-
-  [width length(mm) / events]
-    expected: FAIL
-
-  [width length(cm) / events]
-    expected: FAIL
-
-  [width length(in) / events]
-    expected: FAIL
-
-  [width percentage(%) / events]
-    expected: FAIL
-
-  [min-height length(pt) / events]
-    expected: FAIL
-
-  [min-height length(pc) / events]
-    expected: FAIL
-
-  [min-height length(px) / events]
-    expected: FAIL
-
-  [min-height length(em) / events]
-    expected: FAIL
-
-  [min-height length(ex) / events]
-    expected: FAIL
-
-  [min-height length(mm) / events]
-    expected: FAIL
-
-  [min-height length(cm) / events]
-    expected: FAIL
-
-  [min-height length(in) / events]
-    expected: FAIL
-
-  [min-height percentage(%) / events]
-    expected: FAIL
-
-  [min-width length(pt) / events]
-    expected: FAIL
-
-  [min-width length(pc) / events]
-    expected: FAIL
-
-  [min-width length(px) / events]
-    expected: FAIL
-
-  [min-width length(em) / events]
-    expected: FAIL
-
-  [min-width length(ex) / events]
-    expected: FAIL
-
-  [min-width length(mm) / events]
-    expected: FAIL
-
-  [min-width length(cm) / events]
-    expected: FAIL
-
-  [min-width length(in) / events]
-    expected: FAIL
-
-  [min-width percentage(%) / events]
-    expected: FAIL
-
-  [max-height length(pt) / events]
-    expected: FAIL
-
-  [max-height length(pc) / events]
-    expected: FAIL
-
-  [max-height length(px) / events]
-    expected: FAIL
-
-  [max-height length(em) / events]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
index 793afafa0e8..a8b624d26cb 100644
--- a/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/properties-value-inherit-002.html.ini
@@ -53,129 +53,6 @@
   [background-position length(px) / events]
     expected: FAIL
 
-  [background-color color(rgba) / values]
-    expected: FAIL
-
-  [border-top-width length(pt) / values]
-    expected: FAIL
-
-  [border-top-width length(pc) / values]
-    expected: FAIL
-
-  [border-top-width length(px) / values]
-    expected: FAIL
-
-  [border-top-width length(em) / values]
-    expected: FAIL
-
-  [border-top-width length(ex) / values]
-    expected: FAIL
-
-  [border-top-width length(mm) / values]
-    expected: FAIL
-
-  [border-top-width length(cm) / values]
-    expected: FAIL
-
-  [border-top-width length(in) / values]
-    expected: FAIL
-
-  [border-right-width length(pt) / values]
-    expected: FAIL
-
-  [border-right-width length(pc) / values]
-    expected: FAIL
-
-  [border-right-width length(px) / values]
-    expected: FAIL
-
-  [border-right-width length(em) / values]
-    expected: FAIL
-
-  [border-right-width length(ex) / values]
-    expected: FAIL
-
-  [border-right-width length(mm) / values]
-    expected: FAIL
-
-  [border-right-width length(cm) / values]
-    expected: FAIL
-
-  [border-right-width length(in) / values]
-    expected: FAIL
-
-  [border-bottom-width length(pt) / values]
-    expected: FAIL
-
-  [border-bottom-width length(pc) / values]
-    expected: FAIL
-
-  [border-bottom-width length(px) / values]
-    expected: FAIL
-
-  [border-bottom-width length(em) / values]
-    expected: FAIL
-
-  [border-bottom-width length(ex) / values]
-    expected: FAIL
-
-  [border-bottom-width length(mm) / values]
-    expected: FAIL
-
-  [border-bottom-width length(cm) / values]
-    expected: FAIL
-
-  [border-bottom-width length(in) / values]
-    expected: FAIL
-
-  [border-left-width length(pt) / values]
-    expected: FAIL
-
-  [border-left-width length(pc) / values]
-    expected: FAIL
-
-  [border-left-width length(px) / values]
-    expected: FAIL
-
-  [border-left-width length(em) / values]
-    expected: FAIL
-
-  [border-left-width length(ex) / values]
-    expected: FAIL
-
-  [border-left-width length(mm) / values]
-    expected: FAIL
-
-  [border-left-width length(cm) / values]
-    expected: FAIL
-
-  [border-left-width length(in) / values]
-    expected: FAIL
-
-  [border-top-color color(rgba) / values]
-    expected: FAIL
-
-  [border-right-color color(rgba) / values]
-    expected: FAIL
-
-  [border-bottom-color color(rgba) / values]
-    expected: FAIL
-
-  [border-left-color color(rgba) / values]
-    expected: FAIL
-
-  [padding-bottom length(pt) / values]
-    expected: FAIL
-
-  [padding-bottom length(pc) / values]
-    expected: FAIL
-
-  [padding-bottom length(px) / values]
-    expected: FAIL
-
-  [padding-bottom length(em) / values]
-    expected: FAIL
-
   [color color(rgba) / values]
     expected: FAIL
 
@@ -325,3 +202,153 @@
 
   [text-shadow shadow(shadow) / values]
     expected: FAIL
+
+  [padding-bottom length(ex) / values]
+    expected: FAIL
+
+  [padding-bottom length(mm) / values]
+    expected: FAIL
+
+  [padding-bottom length(cm) / values]
+    expected: FAIL
+
+  [padding-bottom length(in) / values]
+    expected: FAIL
+
+  [padding-left length(pt) / values]
+    expected: FAIL
+
+  [padding-left length(pc) / values]
+    expected: FAIL
+
+  [padding-left length(px) / values]
+    expected: FAIL
+
+  [padding-left length(em) / values]
+    expected: FAIL
+
+  [padding-left length(ex) / values]
+    expected: FAIL
+
+  [padding-left length(mm) / values]
+    expected: FAIL
+
+  [padding-left length(cm) / values]
+    expected: FAIL
+
+  [padding-left length(in) / values]
+    expected: FAIL
+
+  [padding-right length(pt) / values]
+    expected: FAIL
+
+  [padding-right length(pc) / values]
+    expected: FAIL
+
+  [padding-right length(px) / values]
+    expected: FAIL
+
+  [padding-right length(em) / values]
+    expected: FAIL
+
+  [padding-right length(ex) / values]
+    expected: FAIL
+
+  [padding-right length(mm) / values]
+    expected: FAIL
+
+  [padding-right length(cm) / values]
+    expected: FAIL
+
+  [padding-right length(in) / values]
+    expected: FAIL
+
+  [padding-top length(pt) / values]
+    expected: FAIL
+
+  [padding-top length(pc) / values]
+    expected: FAIL
+
+  [padding-top length(px) / values]
+    expected: FAIL
+
+  [padding-top length(em) / values]
+    expected: FAIL
+
+  [padding-top length(ex) / values]
+    expected: FAIL
+
+  [padding-top length(mm) / values]
+    expected: FAIL
+
+  [padding-top length(cm) / values]
+    expected: FAIL
+
+  [padding-top length(in) / values]
+    expected: FAIL
+
+  [margin-bottom length(pt) / values]
+    expected: FAIL
+
+  [margin-bottom length(pc) / values]
+    expected: FAIL
+
+  [margin-bottom length(px) / values]
+    expected: FAIL
+
+  [margin-bottom length(em) / values]
+    expected: FAIL
+
+  [margin-bottom length(ex) / values]
+    expected: FAIL
+
+  [margin-bottom length(mm) / values]
+    expected: FAIL
+
+  [margin-bottom length(cm) / values]
+    expected: FAIL
+
+  [margin-bottom length(in) / values]
+    expected: FAIL
+
+  [margin-left length(pt) / values]
+    expected: FAIL
+
+  [margin-left length(pc) / values]
+    expected: FAIL
+
+  [margin-left length(px) / values]
+    expected: FAIL
+
+  [margin-left length(em) / values]
+    expected: FAIL
+
+  [margin-left length(ex) / values]
+    expected: FAIL
+
+  [margin-left length(mm) / values]
+    expected: FAIL
+
+  [margin-left length(cm) / values]
+    expected: FAIL
+
+  [margin-left length(in) / values]
+    expected: FAIL
+
+  [margin-right length(pt) / values]
+    expected: FAIL
+
+  [margin-right length(pc) / values]
+    expected: FAIL
+
+  [margin-right length(px) / values]
+    expected: FAIL
+
+  [margin-right length(em) / values]
+    expected: FAIL
+
+  [margin-right length(ex) / values]
+    expected: FAIL
+
+  [margin-right length(mm) / values]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini
new file mode 100644
index 00000000000..8f6f663ba61
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-subpixel.html]
+  [Hit test top left corner of box]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
new file mode 100644
index 00000000000..a6bca7ac372
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-visibility-hidden-resizer.html]
+  [elementFromPoint on resizer area of an element with visibility:hidden]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
index 898f39c4330..9f2a3229231 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
@@ -20,3 +20,6 @@
 
   [test the top of layer]
     expected: FAIL
+
+  [test some point of the element: top left corner]
+    expected: FAIL
diff --git a/tests/wpt/metadata/custom-elements/cross-realm-callback-report-exception.html.ini b/tests/wpt/metadata/custom-elements/cross-realm-callback-report-exception.html.ini
new file mode 100644
index 00000000000..3c0f593d09c
--- /dev/null
+++ b/tests/wpt/metadata/custom-elements/cross-realm-callback-report-exception.html.ini
@@ -0,0 +1,3 @@
+[cross-realm-callback-report-exception.html]
+  [constructor]
+    expected: FAIL
diff --git a/tests/wpt/metadata/dom/events/webkit-transition-end-event.html.ini b/tests/wpt/metadata/dom/events/webkit-transition-end-event.html.ini
index c7813a85d31..b7fe8688a23 100644
--- a/tests/wpt/metadata/dom/events/webkit-transition-end-event.html.ini
+++ b/tests/wpt/metadata/dom/events/webkit-transition-end-event.html.ini
@@ -1,5 +1,4 @@
 [webkit-transition-end-event.html]
-  expected: TIMEOUT
   [dispatchEvent of an transitionend event does not trigger a prefixed event handler or listener]
     expected: FAIL
 
@@ -13,7 +12,7 @@
     expected: FAIL
 
   [event types for prefixed and unprefixed transitionend event listeners should be named appropriately]
-    expected: NOTRUN
+    expected: FAIL
 
   [ontransitionend and onwebkittransitionend are not aliases]
     expected: FAIL
@@ -26,12 +25,3 @@
 
   [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: TIMEOUT
-
-  [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/metadata/fetch/content-length/parsing.window.js.ini b/tests/wpt/metadata/fetch/content-length/parsing.window.js.ini
index ac656410273..e8237fbb8f9 100644
--- a/tests/wpt/metadata/fetch/content-length/parsing.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-length/parsing.window.js.ini
@@ -77,8 +77,5 @@
   [Input: "Content-Length: ". Expected: 42.]
     expected: FAIL
 
-  [Input: "Content-Length: 42\\r\\nContent-Length: 42". Expected: 42.]
-    expected: FAIL
-
-  [Input: "Content-Length: 30". Expected: 30.]
+  [Input: "Content-Length: 42,42". Expected: 42.]
     expected: FAIL
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index d77a92f76a2..be7494e9c52 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -52,3 +52,6 @@
 
   [combined text/javascript ]
     expected: FAIL
+
+  [separate text/javascript x/x]
+    expected: FAIL
diff --git a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
index f9de5391ad6..36a410bfecb 100644
--- a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -146,3 +146,6 @@
 
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
+
+  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
index ca1272c0009..12ead2b354f 100644
--- a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -10,6 +10,3 @@
 
   [X-Content-Type-Options%3A%0D%0AX-Content-Type-Options%3A%20nosniff]
     expected: FAIL
-
-  [X-Content-Type-Options%3A%20%22nosniFF%22]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
index 856bb1c9901..5f9a07f92f0 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
@@ -1,10 +1,6 @@
 [iframe-src-aboutblank-navigate-immediately.html]
-  expected: TIMEOUT
   [Navigating to a different document with window.open]
     expected: FAIL
 
   [Navigating to a different document with form submission]
-    expected: TIMEOUT
-
-  [Navigating to a different document with link click]
     expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
index c07cbe00d9b..574b2fd8927 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini
@@ -2,11 +2,8 @@
   [load & pageshow event do not fire on contentWindow of <iframe> element created with no src]
     expected: FAIL
 
-  [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?foo']
     expected: FAIL
 
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
+  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
     expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
index 324db3d9b35..5aef7ce66ce 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
@@ -10,3 +10,6 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
+
+  [load event does not fire on window.open('about:blank')]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 8ae58f9f1e2..78240a2f463 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -16,6 +16,3 @@
 
   [D83D DE0D set in href="" targeting a frame and clicked]
     expected: FAIL
-
-  [DE0D 0041 set in href="" targeting a frame and clicked]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
index 9eb22957864..27889a98fb5 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini
@@ -1,7 +1,6 @@
 [navigate-to-unparseable-url.html]
-  expected: TIMEOUT
   [location.href setter throws a SyntaxError DOMException for unparseable URLs]
-    expected: TIMEOUT
+    expected: FAIL
 
   [<a> tag navigate fails for unparseable URLs]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html.ini b/tests/wpt/metadata/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/metadata/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/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
new file mode 100644
index 00000000000..7dc346632a4
--- /dev/null
+++ b/tests/wpt/metadata/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/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
index 58a99633547..d169bd2e9fa 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/supported-elements.html.ini
@@ -1,19 +1,15 @@
 [supported-elements.html]
-  expected: TIMEOUT
   [Contenteditable element should support autofocus]
     expected: FAIL
 
   [Element with tabindex should support autofocus]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Host element with delegatesFocus including no focusable descendants should be skipped]
-    expected: NOTRUN
+    expected: FAIL
 
   [Area element should support autofocus]
-    expected: NOTRUN
+    expected: FAIL
 
   [Host element with delegatesFocus should support autofocus]
-    expected: NOTRUN
-
-  [Non-HTMLElement should not support autofocus]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini
new file mode 100644
index 00000000000..f70b3854c56
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html.ini
@@ -0,0 +1,3 @@
+[toBlob-cross-realm-callback-report-exception.html]
+  [toBlob() reports the exception from its callback in the callback's global object]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini
new file mode 100644
index 00000000000..ee35b2ec56d
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html.ini
@@ -0,0 +1,3 @@
+[embed-svg-navigation-resets-size.html]
+  [Intrinsic sizing of SVG embedded via <embed> should disappear on navigation]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 25d9964f057..2d3fbf0f308 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata/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/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index fe55ddae3f1..eacbe5794ea 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,4 +1,5 @@
 [iframe_sandbox_popups_escaping-3.html]
   type: testharness
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index d5fd800f09d..653c5e98f2f 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,4 +1,4 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
index 31745fdcdcf..31928ad3947 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/sandbox-top-navigation-child-special-cases.tentative.sub.window.js.ini
@@ -1,4 +1,5 @@
 [sandbox-top-navigation-child-special-cases.tentative.sub.window.html]
+  expected: TIMEOUT
   [Allow top with user activation + user activation]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index 3cdeb8ebcbc..47b45e65a1c 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,3 +1,9 @@
 [non-active-document.html]
   [DOMParser]
     expected: FAIL
+
+  [createHTMLDocument]
+    expected: FAIL
+
+  [<template>]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
index 9101c169754..f10b4ec208d 100644
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/multipart-formdata.window.js.ini
@@ -175,6 +175,3 @@
 
   [multipart/form-data: character not in encoding in filename (formdata event)]
     expected: FAIL
-
-  [multipart/form-data: Basic test (formdata event)]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
index 2d44172f4dc..cc18f512574 100644
--- a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
+++ b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
@@ -1,6 +1,5 @@
 [htmlanchorelement_noopener.html]
   type: testharness
-  expected: TIMEOUT
   [Check that targeting of rel=noopener with a given name ignores an existing window with that name]
     expected: NOTRUN
 
@@ -8,10 +7,10 @@
     expected: FAIL
 
   [Check that rel=noopener with target=_top does a normal load]
-    expected: NOTRUN
+    expected: FAIL
 
   [Check that rel=noopener with target=_parent does a normal load]
-    expected: NOTRUN
+    expected: FAIL
 
   [Check that rel=noopener with target=_self does a normal load]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..b8bdf33cb65
--- /dev/null
+++ b/tests/wpt/metadata/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/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
new file mode 100644
index 00000000000..53acb938c1b
--- /dev/null
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
@@ -0,0 +1,3 @@
+[module-static-import-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/metadata/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/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/metadata/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/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
index 4a48dd15a9d..1d71471b73c 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
@@ -1,6 +1,7 @@
 [promise-rejection-events.html]
+  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: FAIL
+    expected: TIMEOUT
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini b/tests/wpt/metadata/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini
new file mode 100644
index 00000000000..d37c885d391
--- /dev/null
+++ b/tests/wpt/metadata/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js.ini
@@ -0,0 +1,3 @@
+[observable-array-no-leak-of-internals.window.html]
+  [ObservableArray's internals won't leak]
+    expected: FAIL
diff --git a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
new file mode 100644
index 00000000000..c7946fc91b4
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
@@ -0,0 +1,4 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/without-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/metadata/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
deleted file mode 100644
index 80f9a4f15b8..00000000000
--- a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[Worker-constructor.html]
-  expected: ERROR
diff --git a/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini b/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini
deleted file mode 100644
index f78f699f620..00000000000
--- a/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[scrollBy.html]
-  [Ensure that the window.scrollBy function affects scroll position as expected]
-    expected: FAIL
diff --git a/tests/wpt/web-platform-tests/.gitignore b/tests/wpt/web-platform-tests/.gitignore
index d5b2da49def..4f85ad3c523 100644
--- a/tests/wpt/web-platform-tests/.gitignore
+++ b/tests/wpt/web-platform-tests/.gitignore
@@ -49,4 +49,4 @@ scratch
 /webaudio/idl/*
 
 # w3c-test.org PR-branch mirroring
-/submissions/
+submissions/
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-fail.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-fail.tentative.https.html
new file mode 100644
index 00000000000..8b1b42ec78d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-fail.tentative.https.html
@@ -0,0 +1,123 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Async Clipboard web custom format write validation tests</title>
+<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<body>Body needed for test_driver.click()</body>
+<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 src="resources/user-activation.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const customFormatArray = [];
+  const customFormatMap = {};
+  for (let i = 0; i <= 100; i++) {
+    customFormatArray.push("web text/CustomFormat" + i);
+    const blobInput = new Blob(['input data'], {type: customFormatArray[i]});
+    customFormatMap[customFormatArray[i]] = blobInput;
+  }
+  const clipboardItemInput = new ClipboardItem(customFormatMap);
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for more than 100 custom formats');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'application/x-custom-format-clipboard-test-format-1';
+  const format2 = 'application/x-custom-format-clipboard-test-format-2';
+  const blobInput1 = new Blob(['input data 1'], {type: format1});
+  const blobInput2 = new Blob(['input data 2'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1, [format2]: blobInput2});
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for custom formats without web prefix');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web ';
+  const format2 = 'web a';
+  const blobInput1 = new Blob(['input data 1'], {type: format1});
+  const blobInput2 = new Blob(['input data 2'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1, [format2]: blobInput2});
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for custom formats with web prefix, but invalid MIME types');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web text/plain';
+  const format2 = 'text/custom';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for custom format with web prefix, but different Blob type');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web Text/plain';
+  const format2 = 'text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+      await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for custom format with different case than the Blob type');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web text/plain';
+  const format2 = 'Text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format1});
+  const clipboardItemInput = new ClipboardItem(
+      {[format2]: blobInput1});
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for invalid mime type that is different than the Blob type');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web Text/plain';
+  const format2 = 'web text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+      await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for invalid mime type with web prefix and the Blob type');
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'Text/plain';
+  const format2 = 'text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+  await waitForUserActivation();
+  await promise_rejects_dom(t, 'NotAllowedError',
+      navigator.clipboard.write([clipboardItemInput]));
+}, 'navigator.clipboard.write() fails for custom format and Blob type with different case');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-web-prefix.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-web-prefix.tentative.https.html
new file mode 100644
index 00000000000..9a6e5da6fff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-web-prefix.tentative.https.html
@@ -0,0 +1,39 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Async Clipboard web custom format read/write test.</title>
+<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<body>Body needed for test_driver.click()</body>
+<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 src="resources/user-activation.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web text/plain';
+  const format2 = 'web text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+  await waitForUserActivation();
+  await navigator.clipboard.write([clipboardItemInput]);
+  await waitForUserActivation();
+  const clipboardItems = await navigator.clipboard.read();
+  assert_equals(clipboardItems.length, 1);
+  const clipboardItem = clipboardItems[0];
+  assert_true(clipboardItem instanceof ClipboardItem);
+  // This test can't verify clipboardItem.types, because its size and values
+  // are both platform-dependent.
+
+  const blobOutput1 = await clipboardItem.getType(format1);
+  assert_equals(blobOutput1.type, format1);
+  const data1 = await (new Response(blobOutput1)).text();
+  assert_equals(data1, 'input data 1');
+}, 'navigator.clipboard.write() for custom format and Blob type with web prefix');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-without-web-prefix.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-without-web-prefix.tentative.https.html
new file mode 100644
index 00000000000..8b9d4de0a1f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read-without-web-prefix.tentative.https.html
@@ -0,0 +1,39 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Async Clipboard web custom format write using Blob without web prefix test.</title>
+<link rel="help" href="https://w3c.github.io/clipboard-apis/#async-clipboard-api">
+<body>Body needed for test_driver.click()</body>
+<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 src="resources/user-activation.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
+  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
+
+  const format1 = 'web text/plain';
+  const format2 = 'text/plain';
+  const blobInput1 = new Blob(['input data 1'], {type: format2});
+  const clipboardItemInput = new ClipboardItem(
+      {[format1]: blobInput1});
+  await waitForUserActivation();
+  await navigator.clipboard.write([clipboardItemInput]);
+  await waitForUserActivation();
+  const clipboardItems = await navigator.clipboard.read();
+  assert_equals(clipboardItems.length, 1);
+  const clipboardItem = clipboardItems[0];
+  assert_true(clipboardItem instanceof ClipboardItem);
+  // This test can't verify clipboardItem.types, because its size and values
+  // are both platform-dependent.
+
+  const blobOutput1 = await clipboardItem.getType(format1);
+  assert_equals(blobOutput1.type, format1);
+  const data1 = await (new Response(blobOutput1)).text();
+  assert_equals(data1, 'input data 1');
+}, 'navigator.clipboard.write() for custom format with web prefix, but Blob type without web prefix');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read.tentative.https.html b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read.tentative.https.html
index b0b78d02432..a005f8c98f0 100644
--- a/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read.tentative.https.html
+++ b/tests/wpt/web-platform-tests/clipboard-apis/async-custom-formats-write-read.tentative.https.html
@@ -44,171 +44,4 @@ promise_test(async t => {
   assert_equals(data2, 'input data 2');
 }, 'Verify write and read clipboard given 2 platform-neutral custom format inputs');
 
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const customFormatArray = [];
-  const customFormatMap = {};
-  for (let i = 0; i <= 100; i++) {
-    customFormatArray.push("web text/CustomFormat" + i);
-    const blobInput = new Blob(['input data'], {type: customFormatArray[i]});
-    customFormatMap[customFormatArray[i]] = blobInput;
-  }
-  const clipboardItemInput = new ClipboardItem(customFormatMap);
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for more than 100 custom formats');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'application/x-custom-format-clipboard-test-format-1';
-  const format2 = 'application/x-custom-format-clipboard-test-format-2';
-  const blobInput1 = new Blob(['input data 1'], {type: format1});
-  const blobInput2 = new Blob(['input data 2'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1, [format2]: blobInput2});
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for custom formats without web prefix');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web ';
-  const format2 = 'web a';
-  const blobInput1 = new Blob(['input data 1'], {type: format1});
-  const blobInput2 = new Blob(['input data 2'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1, [format2]: blobInput2});
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for custom formats with web prefix, but invalid MIME types');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web text/plain';
-  const format2 = 'text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-  await waitForUserActivation();
-  await navigator.clipboard.write([clipboardItemInput]);
-  await waitForUserActivation();
-  const clipboardItems = await navigator.clipboard.read();
-  assert_equals(clipboardItems.length, 1);
-  const clipboardItem = clipboardItems[0];
-  assert_true(clipboardItem instanceof ClipboardItem);
-  // This test can't verify clipboardItem.types, because its size and values
-  // are both platform-dependent.
-
-  const blobOutput1 = await clipboardItem.getType(format1);
-  assert_equals(blobOutput1.type, format1);
-  const data1 = await (new Response(blobOutput1)).text();
-  assert_equals(data1, 'input data 1');
-}, 'navigator.clipboard.write() for custom format with web prefix, but Blob type without web prefix');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web text/plain';
-  const format2 = 'text/custom';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for custom format with web prefix, but different Blob type');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web Text/plain';
-  const format2 = 'text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-      await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for custom format with different case than the Blob type');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web text/plain';
-  const format2 = 'Text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format1});
-  const clipboardItemInput = new ClipboardItem(
-      {[format2]: blobInput1});
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for invalid mime type that is different than the Blob type');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web Text/plain';
-  const format2 = 'web text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-      await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for invalid mime type with web prefix and the Blob type');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'web text/plain';
-  const format2 = 'web text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-  await waitForUserActivation();
-  await navigator.clipboard.write([clipboardItemInput]);
-  await waitForUserActivation();
-  const clipboardItems = await navigator.clipboard.read();
-  assert_equals(clipboardItems.length, 1);
-  const clipboardItem = clipboardItems[0];
-  assert_true(clipboardItem instanceof ClipboardItem);
-  // This test can't verify clipboardItem.types, because its size and values
-  // are both platform-dependent.
-
-  const blobOutput1 = await clipboardItem.getType(format1);
-  assert_equals(blobOutput1.type, format1);
-  const data1 = await (new Response(blobOutput1)).text();
-  assert_equals(data1, 'input data 1');
-}, 'navigator.clipboard.write() for custom format and Blob type with web prefix');
-
-promise_test(async t => {
-  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
-  await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
-
-  const format1 = 'Text/plain';
-  const format2 = 'text/plain';
-  const blobInput1 = new Blob(['input data 1'], {type: format2});
-  const clipboardItemInput = new ClipboardItem(
-      {[format1]: blobInput1});
-  await waitForUserActivation();
-  await promise_rejects_dom(t, 'NotAllowedError',
-      navigator.clipboard.write([clipboardItemInput]));
-}, 'navigator.clipboard.write() fails for custom format and Blob type with different case');
-
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-004.html b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-004.html
new file mode 100644
index 00000000000..d6d4d642762
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-004.html
@@ -0,0 +1,116 @@
+<!DOCTYPE html>
+<title>The `anchor()` function with percentages</title>
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-pos">
+<link rel="author" href="mailto:kojii@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<style>
+.relpos {
+  position: relative;
+  width: 200px;
+  outline: 1px solid;
+}
+.vrl-rtl {
+  writing-mode: vertical-rl;
+  direction: rtl;
+}
+.spacer {
+  background: yellow;
+  width: 10px;
+  height: 10px;
+}
+#anchor {
+  anchor-name: --a1;
+  margin: 20px;
+  width: 100px;
+  height: 200px;
+  background: orange;
+}
+.target {
+  position: absolute;
+}
+</style>
+<body onload="checkLayout('.target')">
+  <div class="relpos">
+    <div class="spacer"></div>
+    <div id="anchor"></div>
+
+    <div class="target" style="left: anchor(--a1 0%)"
+         data-offset-x="20"></div>
+    <div class="target" style="left: anchor(--a1 20%)"
+         data-offset-x="40"></div>
+    <div class="target" style="left: anchor(--a1 50%)"
+         data-offset-x="70"></div>
+    <div class="target" style="left: anchor(--a1 center)"
+         data-offset-x="70"></div>
+    <div class="target" style="left: anchor(--a1 80%)"
+         data-offset-x="100"></div>
+    <div class="target" style="left: anchor(--a1 100%)"
+         data-offset-x="120"></div>
+
+    <div class="target" style="right: anchor(--a1 0%)"
+         data-offset-x="20"></div>
+    <div class="target" style="right: anchor(--a1 20%)"
+         data-offset-x="40"></div>
+    <div class="target" style="right: anchor(--a1 50%)"
+         data-offset-x="70"></div>
+    <div class="target" style="right: anchor(--a1 center)"
+         data-offset-x="70"></div>
+    <div class="target" style="right: anchor(--a1 80%)"
+         data-offset-x="100"></div>
+    <div class="target" style="right: anchor(--a1 100%)"
+         data-offset-x="120"></div>
+
+    <div class="target" style="top: anchor(--a1 0%)"
+         data-offset-y="30"></div>
+    <div class="target" style="top: anchor(--a1 20%)"
+         data-offset-y="70"></div>
+    <div class="target" style="top: anchor(--a1 50%)"
+         data-offset-y="130"></div>
+    <div class="target" style="top: anchor(--a1 center)"
+         data-offset-y="130"></div>
+    <div class="target" style="top: anchor(--a1 80%)"
+         data-offset-y="190"></div>
+    <div class="target" style="top: anchor(--a1 100%)"
+         data-offset-y="230"></div>
+
+    <div class="target" style="bottom: anchor(--a1 0%)"
+         data-offset-y="30"></div>
+    <div class="target" style="bottom: anchor(--a1 20%)"
+         data-offset-y="70"></div>
+    <div class="target" style="bottom: anchor(--a1 50%)"
+         data-offset-y="130"></div>
+    <div class="target" style="bottom: anchor(--a1 center)"
+         data-offset-y="130"></div>
+    <div class="target" style="bottom: anchor(--a1 80%)"
+         data-offset-y="190"></div>
+    <div class="target" style="bottom: anchor(--a1 100%)"
+         data-offset-y="230"></div>
+  </div>
+
+  <div class="vrl-rtl relpos">
+    <div class="spacer"></div>
+    <div id="anchor"></div>
+
+    <div class="target" style="left: anchor(--a1 0%)"
+         data-offset-x="170"></div>
+    <div class="target" style="left: anchor(--a1 100%)"
+         data-offset-x="70"></div>
+
+    <div class="target" style="right: anchor(--a1 0%)"
+         data-offset-x="170"></div>
+    <div class="target" style="right: anchor(--a1 100%)"
+         data-offset-x="70"></div>
+
+    <div class="target" style="top: anchor(--a1 0%)"
+         data-offset-y="220"></div>
+    <div class="target" style="top: anchor(--a1 100%)"
+         data-offset-y="20"></div>
+
+    <div class="target" style="bottom: anchor(--a1 0%)"
+         data-offset-y="220"></div>
+    <div class="target" style="bottom: anchor(--a1 100%)"
+         data-offset-y="20"></div>
+  </div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-writing-modes-002.html b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-writing-modes-002.html
new file mode 100644
index 00000000000..691271289a8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-position-writing-modes-002.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<title>Tests logical `anchor` function for `writing-mode`/`direction`s</title>
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#anchor-pos">
+<link rel="author" href="mailto:kojii@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script><style>
+<style>
+.htb-ltr { writing-mode: horizontal-tb; direction: ltr; }
+.htb-rtl { writing-mode: horizontal-tb; direction: rtl; }
+.vlr-ltr { writing-mode: vertical-lr; direction: ltr; }
+.vlr-rtl { writing-mode: vertical-lr; direction: rtl; }
+.vrl-ltr { writing-mode: vertical-rl; direction: ltr; }
+.vrl-rtl { writing-mode: vertical-rl; direction: rtl; }
+.relpos {
+  position: relative;
+  outline: blue 1px solid;
+}
+.spacer {
+  width: 10px;
+  height: 10px;
+  background: yellow;
+}
+.anchor {
+  anchor-name: --a1;
+  margin: 5px;
+  width: 30px;
+  height: 30px;
+  background: orange;
+}
+.target {
+  position: absolute;
+  outline: 5px solid lime;
+}
+</style>
+<body>
+  <template id="template">
+    <div class="relpos">
+      <div class="spacer"></div>
+      <div class="anchor"></div>
+    </div>
+  </template>
+<script>
+// Generate tests for all combinations.
+// The first two entries are the side `start` and `end` should match in x-axis.
+// The next two entries are the side `start` and `end` should match in y-axis.
+const writingDirs = {
+  'htb-ltr':['l', 'r', 't', 'b'],
+  'htb-rtl':['r', 'l', 't', 'b'],
+  'vrl-ltr':['r', 'l', 't', 'b'],
+  'vrl-rtl':['r', 'l', 'b', 't'],
+  'vlr-ltr':['l', 'r', 't', 'b'],
+  'vlr-rtl':['l', 'r', 'b', 't'],
+};
+const container = document.body;
+const cb_template = template.content.firstElementChild;
+for (const [writingDir, matches] of Object.entries(writingDirs)) {
+  const cb = cb_template.cloneNode(true);
+  cb.classList.add(writingDir);
+  createTarget(null, 'left: anchor(--a1 start)', matches[0], cb);
+  createTarget(null, 'left: anchor(--a1 end)', matches[1], cb);
+  createTarget(null, 'top: anchor(--a1 start)', matches[2], cb);
+  createTarget(null, 'top: anchor(--a1 end)', matches[3], cb);
+  createTarget(writingDir, 'left: anchor(--a1 self-start)', matches[0], cb);
+  createTarget(writingDir, 'left: anchor(--a1 self-end)', matches[1], cb);
+  createTarget(writingDir, 'top: anchor(--a1 self-start)', matches[2], cb);
+  createTarget(writingDir, 'top: anchor(--a1 self-end)', matches[3], cb);
+  container.appendChild(cb);
+}
+
+function createTarget(className, style, match, cb) {
+  const target = document.createElement('div');
+  target.classList.add('target');
+  if (className)
+    target.classList.add(className);
+  target.style = style;
+  target.dataset.name = style;
+  target.dataset.match = match;
+  cb.appendChild(target);
+}
+
+// Test all `.target`s.
+for (const target of document.querySelectorAll('.target')) {
+  const cb = target.parentElement;
+  const anchor = cb.querySelector('.anchor');
+  test(() => {
+    switch (target.dataset.match) {
+      case 'l':
+        assert_equals(anchor.offsetLeft, target.offsetLeft);
+        break;
+      case 'r':
+        assert_equals(anchor.offsetLeft + anchor.offsetWidth, target.offsetLeft);
+        break;
+      case 't':
+        assert_equals(anchor.offsetTop, target.offsetTop);
+        break;
+      case 'b':
+        assert_equals(anchor.offsetTop + anchor.offsetHeight, target.offsetTop);
+        break;
+    }
+  }, `${cb.classList}/${target.classList}/${target.dataset.name}`);
+}
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/at-position-fallback-invalidation-shadow-dom.html b/tests/wpt/web-platform-tests/css/css-anchor-position/at-position-fallback-invalidation-shadow-dom.html
new file mode 100644
index 00000000000..569278ac90f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/at-position-fallback-invalidation-shadow-dom.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<title>CSS Anchor Positioning Test: Dynamically change @position-fallback rules in Shadow DOM</title>
+<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback-rule">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/declarative-shadow-dom-polyfill.js"></script>
+<style>
+  body { margin: 0; }
+</style>
+
+<div id="host">
+  <template shadowroot="open">
+    <style>
+      ::slotted(#slotted), :host {
+        position-fallback: --pf;
+        position: absolute;
+      }
+    </style>
+    <slot></slot>
+  </template>
+  <div id="slotted"></div>
+</div>
+
+<script>
+  setup(() => {
+    polyfill_declarative_shadow_dom(host);
+  });
+
+  test(() => {
+    assert_equals(host.offsetLeft, 0);
+  }, "#host is initially left:auto");
+
+  test(() => {
+    assert_equals(slotted.offsetLeft, 0);
+  }, "#slotted is initially left:auto");
+
+  host.shadowRoot.styleSheets[0].insertRule(`
+    @position-fallback --pf {
+      @try { left: 100px; }
+    }
+  `);
+
+  test(() => {
+    assert_equals(host.offsetLeft, 100);
+  }, "#host with inserted @position-fallback applied");
+
+  test(() => {
+    assert_equals(slotted.offsetLeft, 100);
+  }, "#slotted with inserted @position-fallback applied");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/webkit-border-radius-valid.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/webkit-border-radius-valid.html
new file mode 100644
index 00000000000..cdf570b4e9f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/webkit-border-radius-valid.html
@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Compatibility: parsing -webkit-border-radius with valid values</title>
+<link rel="help" href="https://compat.spec.whatwg.org/#propdef--webkit-border-radius">
+<link rel="help" href="https://github.com/whatwg/compat/issues/133">
+<meta name="assert" content="-webkit-border-radius supports CSS Wide keywords and the full grammar '<length-percentage>{1,4} [ / <length-percentage>{1,4} ]?'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_valid_value("-webkit-border-radius", "initial");
+test_valid_value("-webkit-border-radius", "inherit");
+test_valid_value("-webkit-border-radius", "unset");
+test_valid_value("-webkit-border-radius", "revert");
+
+test_valid_value("-webkit-border-radius", "1px");
+test_valid_value("-webkit-border-radius", "1px 5%", ["1px 5%", "1px / 5%"]);
+test_valid_value("-webkit-border-radius", "1px 2% 3px");
+test_valid_value("-webkit-border-radius", "1px 2% 3px 4%");
+test_valid_value("-webkit-border-radius", "1px / 2px", ["1px 2px", "1px / 2px"]);
+test_valid_value("-webkit-border-radius", "5em / 1px 2% 3px 4%");
+test_valid_value("-webkit-border-radius", "1px 2% / 3px 4px");
+test_valid_value("-webkit-border-radius", "1px 2px 3em / 1px 2px 3%");
+test_valid_value("-webkit-border-radius", "1px 2% / 2px 3em 4px 5em");
+test_valid_value("-webkit-border-radius", "1px 2% 3px 4% / 5em");
+
+test_valid_value("-webkit-border-radius", "1px 1px 1px 2% / 1px 2% 1px 2%", "1px 1px 1px 2% / 1px 2%");
+test_valid_value("-webkit-border-radius", "1px 1px 1px 1px / 1px 1px 2% 1px", "1px / 1px 1px 2%");
+test_valid_value("-webkit-border-radius", "1px 1px 2% 2%");
+test_valid_value("-webkit-border-radius", "1px 2% 1px 1px");
+test_valid_value("-webkit-border-radius", "1px 2% 2% 2% / 1px 2% 3px 2%", "1px 2% 2% / 1px 2% 3px");
+
+test_valid_value("-webkit-border-top-left-radius", "10px");
+test_valid_value("-webkit-border-top-right-radius", "20%");
+test_valid_value("-webkit-border-bottom-right-radius", "30px 40%");
+test_valid_value("-webkit-border-bottom-left-radius", "50% 60px");
+
+// Some browsers treat '-webkit-border-radius: l1 l2' as 'border-radius: l1 / l2'.
+// Regardless of whether this is done, ensure that there is round-tripping.
+const target = document.getElementById("target");
+const style = target.style;
+const cs = getComputedStyle(target);
+test(function() {
+  style.cssText = "-webkit-border-radius: 1px 2px";
+  const oldLonghands = [...style].map(p => p + ": " + style[p]);
+  const value = style.getPropertyValue("border-radius");
+  assert_in_array(value, ["1px 2px", "1px / 2px"]);
+  assert_equals(cs.getPropertyValue("border-radius"), value);
+  style.cssText = "border-radius: " + value;
+  const newLonghands = [...style].map(p => p + ": " + style[p]);
+  assert_array_equals(newLonghands, oldLonghands);
+}, "Serialize border-radius from -webkit-border-radius: 1px 2px");
+test(function() {
+  style.cssText = "border-radius: 1px 2px";
+  const oldLonghands = [...style].map(p => p + ": " + style[p]);
+  const value = style.getPropertyValue("-webkit-border-radius");
+  assert_in_array(value, ["1px 2px", "1px 2px 1px"]);
+  assert_equals(cs.getPropertyValue("-webkit-border-radius"), value);
+  style.cssText = "-webkit-border-radius: " + value;
+  const newLonghands = [...style].map(p => p + ": " + style[p]);
+  assert_array_equals(newLonghands, oldLonghands);
+}, "Serialize -webkit-border-radius from border-radius: 1px 2px");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-break/fieldset-002.html b/tests/wpt/web-platform-tests/css/css-break/fieldset-002.html
index aea8cec5d43..9331b81b119 100644
--- a/tests/wpt/web-platform-tests/css/css-break/fieldset-002.html
+++ b/tests/wpt/web-platform-tests/css/css-break/fieldset-002.html
@@ -1,10 +1,10 @@
 <!DOCTYPE html>
 <link rel="author" title="Ana Sollano Kim" href="mailto:ansollan@microsoft.com">
-<link rel="help" href="href=https://www.w3.org/TR/css-break-3/#break-decoration">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#break-decoration">
 <link rel="match" href="fieldset-002-ref.html">
 <p>There should be a light blue fieldset that starts in the first column and
   ends in the third. The top border should only be in the first column, and
   the bottom border should only be in the third.</p>
 <div style="column-count:3; column-fill:auto; column-gap:10px; width:500px; height:200px;">
   <fieldset style="border:10px solid pink; margin:0; padding:0; height:500px; background:lightblue;"></fieldset>
-</div>
\ No newline at end of file
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-break/fieldset-003.html b/tests/wpt/web-platform-tests/css/css-break/fieldset-003.html
index 6c23a4b93e4..dbf69a40348 100644
--- a/tests/wpt/web-platform-tests/css/css-break/fieldset-003.html
+++ b/tests/wpt/web-platform-tests/css/css-break/fieldset-003.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <link rel="author" title="Ana Sollano Kim" href="mailto:ansollan@microsoft.com">
-<link rel="help" href="href=https://www.w3.org/TR/css-break-3/#break-decoration">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#break-decoration">
 <link rel="match" href="fieldset-003-ref.html">
 <p>There should be a light blue fieldset that starts in the first column and
   ends in the third. Its blue violet legend should only be in the first column,
@@ -10,4 +10,4 @@
   <fieldset style="margin:0; border:60px solid pink; padding:0; width:100px; background:lightblue; height:10px;">
     <legend style="padding:0; width:100px; height:50px; background:blueviolet;"></legend>
   </fieldset>
-</div>
\ No newline at end of file
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-break/fieldset-004.html b/tests/wpt/web-platform-tests/css/css-break/fieldset-004.html
index ce832f82985..4b49e6a5946 100644
--- a/tests/wpt/web-platform-tests/css/css-break/fieldset-004.html
+++ b/tests/wpt/web-platform-tests/css/css-break/fieldset-004.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <link rel="author" title="Ana Sollano Kim" href="mailto:ansollan@microsoft.com">
-<link rel="help" href="href=https://www.w3.org/TR/css-break-3/#break-decoration">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#break-decoration">
 <link rel="match" href="fieldset-004-ref.html">
 <p>There should be a light blue fieldset that starts in the first column and
   ends in the third. Its blue violet legend should only be in the first column,
@@ -11,4 +11,4 @@
   <fieldset style="border:10px solid pink; margin:0; padding:0; height:590px; background:lightblue;">
     <legend style="padding:0; margin:0; width:50px; height:300px; background:blueviolet;"></legend>
   </fieldset>
-</div>
\ No newline at end of file
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-color/animation/color-interpolation.html b/tests/wpt/web-platform-tests/css/css-color/animation/color-interpolation.html
index 7bda888a0b4..fd3d426bafd 100644
--- a/tests/wpt/web-platform-tests/css/css-color/animation/color-interpolation.html
+++ b/tests/wpt/web-platform-tests/css/css-color/animation/color-interpolation.html
@@ -99,10 +99,10 @@ test_interpolation({
 }, [
   {at: -0.3, expect: 'oklab(0 0 0)'},
   {at: 0, expect: 'oklab(0 0 0)'},
-  {at: 0.3, expect: 'oklab(0.3 0 0)'},
-  {at: 0.6, expect: 'oklab(0.6 0 0)'},
-  {at: 1, expect: 'oklab(1 0 0)'},
-  {at: 1.5, expect: 'oklab(1.5 0 0)'},
+  {at: 0.3, expect: 'oklab(30 0 0)'},
+  {at: 0.6, expect: 'oklab(60 0 0)'},
+  {at: 1, expect: 'oklab(100 0 0)'},
+  {at: 1.5, expect: 'oklab(150 0 0)'},
 ]);
 
 test_interpolation({
@@ -112,10 +112,10 @@ test_interpolation({
 }, [
   {at: -0.3, expect: 'oklab(0 0 0)'},
   {at: 0, expect: 'oklab(0 0 0)'},
-  {at: 0.3, expect: 'oklab(0.3 0 0)'},
-  {at: 0.6, expect: 'oklab(0.6 0 0)'},
-  {at: 1, expect: 'oklab(1 0 0)'},
-  {at: 1.5, expect: 'oklab(1.5 0 0)'},
+  {at: 0.3, expect: 'oklab(30 0 0)'},
+  {at: 0.6, expect: 'oklab(60 0 0)'},
+  {at: 1, expect: 'oklab(100 0 0)'},
+  {at: 1.5, expect: 'oklab(150 0 0)'},
 ]);
 
 test_interpolation({
@@ -125,9 +125,9 @@ test_interpolation({
 }, [
   {at: -0.3, expect: 'oklab(0 0 0)'},
   {at: 0, expect: 'oklab(0 0 0)'},
-  {at: 0.3, expect: 'oklab(0.3 0 0)'},
-  {at: 0.6, expect: 'oklab(0.6 0 0)'},
-  {at: 1, expect: 'oklab(1 0 0)'},
-  {at: 1.5, expect: 'oklab(1.5 0 0)'},
+  {at: 0.3, expect: 'oklab(30 0 0)'},
+  {at: 0.6, expect: 'oklab(60 0 0)'},
+  {at: 1, expect: 'oklab(100 0 0)'},
+  {at: 1.5, expect: 'oklab(150 0 0)'},
 ]);
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/Highlight-setlike-tampered-Set-prototype.html b/tests/wpt/web-platform-tests/css/css-highlight-api/Highlight-setlike-tampered-Set-prototype.html
new file mode 100644
index 00000000000..4c23f4850c1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/Highlight-setlike-tampered-Set-prototype.html
@@ -0,0 +1,55 @@
+<!doctype html>
+<title>Highlight is a setlike interface that works as expected even if Set.prototype is tampered</title>
+<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+"use strict";
+
+function tamperSetPrototype() {
+  delete Set.prototype.size;
+
+  Set.prototype.entries = null;
+  Set.prototype.forEach = undefined;
+  Set.prototype.has = "foo";
+  Set.prototype.keys = 0;
+  Set.prototype.values = Symbol();
+  Set.prototype[Symbol.iterator] = 1;
+  Set.prototype.add = true;
+  Set.prototype.clear = "";
+  Set.prototype.delete = -1.5;
+
+  Object.freeze(Set.prototype);
+}
+
+test(() => {
+  tamperSetPrototype();
+
+  const staticRange = new StaticRange({startContainer: document.body, endContainer: document.body, startOffset: 0, endOffset: 0});
+  const highlight = new Highlight(staticRange);
+
+  assert_equals(highlight.size, 1);
+  assert_true(highlight.has(staticRange));
+  assert_equals([...highlight.entries()][0][0], staticRange);
+
+  highlight.clear();
+  assert_equals(highlight.size, 0);
+
+  highlight.add(staticRange);
+  assert_equals(highlight.size, 1);
+
+  highlight.delete(staticRange);
+  assert_equals(highlight.size, 0);
+  assert_false(highlight.has(staticRange));
+
+  highlight.add(staticRange);
+  assert_equals([...highlight.keys()][0], staticRange);
+  assert_equals([...highlight.values()][0], staticRange);
+
+  let callbackCalled = false;
+  highlight.forEach(() => { callbackCalled = true; });
+  assert_true(callbackCalled);
+}, "Highlight is a setlike interface that works as expected even if Set.prototype is tampered.");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html b/tests/wpt/web-platform-tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html
new file mode 100644
index 00000000000..3b38bd8f162
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-highlight-api/HighlightRegistry-maplike-tampered-Map-prototype.html
@@ -0,0 +1,61 @@
+<!doctype html>
+<title>HighlightRegistry is a maplike interface that works as expected even if Map.prototype is tampered</title>
+<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+"use strict";
+
+function tamperMapPrototype() {
+  delete Map.prototype.size;
+
+  Map.prototype.entries = null;
+  Map.prototype.forEach = undefined;
+  Map.prototype.get = "foo";
+  Map.prototype.has = 0;
+  Map.prototype.keys = Symbol();
+  Map.prototype.values = 1;
+  Map.prototype[Symbol.iterator] = true;
+  Map.prototype.clear = false;
+  Map.prototype.delete = "";
+  Map.prototype.set = 3.14;
+
+  Object.freeze(Map.prototype);
+}
+
+test(() => {
+  tamperMapPrototype();
+
+  const highlight = new Highlight(new StaticRange({startContainer: document.body, endContainer: document.body, startOffset: 0, endOffset: 0}));
+  const highlightRegister = new HighlightRegister();
+
+  assert_equals(highlightRegister.size, 0);
+  highlightRegister.set("foo", highlight);
+  assert_equals(highlightRegister.size, 1);
+
+  assert_true(highlightRegister.has("foo"));
+  assert_equals([...highlightRegister.entries()][0][0], "foo");
+
+  highlightRegister.clear();
+  assert_equals(highlightRegister.size, 0);
+  assert_equals(highlightRegister.get("foo"), undefined);
+
+  highlightRegister.set("bar", highlight);
+  assert_equals(highlightRegister.get("bar"), highlight);
+  assert_equals([...highlightRegister][0][1], highlight);
+
+  highlightRegister.delete("bar");
+  assert_equals(highlightRegister.size, 0);
+  assert_false(highlightRegister.has("bar"));
+
+  highlightRegister.set("baz", highlight);
+  assert_equals([...highlightRegister.keys()][0], "baz");
+  assert_equals([...highlightRegister.values()][0], highlight);
+
+  let callbackCalled = false;
+  highlightRegister.forEach(() => { callbackCalled = true; });
+  assert_true(callbackCalled);
+}, "HighlightRegistry is a maplike interface that works as expected even if Map.prototype is tampered.");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-images/parsing/gradient-interpolation-method-valid.html b/tests/wpt/web-platform-tests/css/css-images/parsing/gradient-interpolation-method-valid.html
index a5ae5c0dd98..8bb6b1caff9 100644
--- a/tests/wpt/web-platform-tests/css/css-images/parsing/gradient-interpolation-method-valid.html
+++ b/tests/wpt/web-platform-tests/css/css-images/parsing/gradient-interpolation-method-valid.html
@@ -31,6 +31,7 @@ const CONIC_GRADIENT_SPECIFIERS = [
 ];
 
 const legacy_stops = "red, blue"
+const legacy_stops_with_hint = "red, 50%, blue"
 const non_legacy_stops = "color(srgb 1 0 0), blue"
 
 function test_gradients_no_specified_interpolation_method(gradientFunction, specifiers, stops)
@@ -58,6 +59,7 @@ function test_gradients(gradientFunction, colorInterpolationMethod, colorInterpo
 function test_gradient_with_interpolation_method(gradientFunction, colorInterpolationMethod, colorInterpolationMethodResult, specifiers, stops) {
     const colorInterpolationMethodResultForLegacyStops = (colorInterpolationMethodResult == "srgb") ? "" : colorInterpolationMethodResult;
     test_gradients(gradientFunction, colorInterpolationMethod, colorInterpolationMethodResultForLegacyStops, specifiers, legacy_stops)
+    test_gradients(gradientFunction, colorInterpolationMethod, colorInterpolationMethodResultForLegacyStops, specifiers, legacy_stops_with_hint)
 
     const colorInterpolationMethodResultForNonLegacyStops = (colorInterpolationMethodResult == "oklab") ? "" : colorInterpolationMethodResult;
     test_gradients(gradientFunction, colorInterpolationMethod, colorInterpolationMethodResultForNonLegacyStops, specifiers, non_legacy_stops)
@@ -65,6 +67,7 @@ function test_gradient_with_interpolation_method(gradientFunction, colorInterpol
 
 function test_each_interpolation_method(gradientFunction, specifiers) {
     test_gradients_no_specified_interpolation_method(gradientFunction, specifiers, legacy_stops)
+    test_gradients_no_specified_interpolation_method(gradientFunction, specifiers, legacy_stops_with_hint)
     test_gradients_no_specified_interpolation_method(gradientFunction, specifiers, non_legacy_stops)
 
     for (const colorSpace of [ "lab", "oklab", "srgb", "srgb-linear", "xyz", "xyz-d50", "xyz-d65" ]) {
diff --git a/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-ref.html b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-ref.html
new file mode 100644
index 00000000000..43cba30d512
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-ref.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Tests initial letter should handle tabular character</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-inline/#initial-letter-styling">
+<meta name="flags" content="ahem">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" >
+<style>
+    .sample {
+        font-family: Ahem;
+        font-size: 20px;
+        line-height: 24px;
+    }
+
+    .fake-initial-letter {
+        background: lime;
+        float: left;
+        height: 80px;
+        margin-top: 14px;
+        width: 80px;
+    }
+
+    .fake-initial-letter-tab {
+        background: yellow;
+        float: left;
+        height: 80px;
+        margin-top: 14px;
+        width: 640px;
+    }
+</style>
+</head>
+<body>
+<div class="sample"><div class="fake-initial-letter-tab"></div>
+<div class="fake-initial-letter"></div>
+bc<br>def<br>ghi<br>jkl<br>mno<br>
+</div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl-ref.html b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl-ref.html
new file mode 100644
index 00000000000..13f633a2598
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl-ref.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Tests initial letter should handle tabular character</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-inline/#initial-letter-styling">
+<meta name="flags" content="ahem">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" >
+<style>
+    .sample {
+        direction: rtl;
+        font-family: Ahem;
+        font-size: 20px;
+        line-height: 24px;
+    }
+
+    .fake-initial-letter {
+        background: lime;
+        float: right;
+        height: 80px;
+        margin-top: 14px;
+        width: 80px;
+    }
+
+    .fake-initial-letter-tab {
+        background: yellow;
+        float: right;
+        height: 80px;
+        margin-top: 14px;
+        width: 640px;
+    }
+</style>
+</head>
+<body>
+<div class="sample"><div class="fake-initial-letter-tab"></div>
+<div class="fake-initial-letter"></div>
+bc<br>def<br>ghi<br>jkl<br>mno<br>
+</div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl.html b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl.html
new file mode 100644
index 00000000000..f8a2d7a2a1c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab-rtl.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Tests initial letter should handle tabular character</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-inline/#initial-letter-styling">
+<meta name="flags" content="ahem">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" >
+<link rel="match" href="initial-letter-with-tab-rtl-ref.html">
+<style>
+    .sample {
+        direction: rtl;
+        font-family: Ahem;
+        font-size: 20px;
+        line-height: 24px;
+    }
+
+    .initial-letter::first-letter {
+        initial-letter: 3 drop;
+        color: lime;
+        font-size: 100px;   /* should be ignored in rendering */
+        line-height: 50px;  /* should be ignored in rendering */
+    }
+
+    .sample { white-space: pre; }
+    .initial-letter::first-letter { background: yellow; }
+</style>
+</head>
+<body>
+<div class="sample initial-letter">&#9;Abc
+def
+ghi
+jkl
+mno</div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab.html b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab.html
new file mode 100644
index 00000000000..49b1f6b4b0e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-inline/initial-letter/initial-letter-with-tab.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Tests initial letter should handle tabular character</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-inline/#initial-letter-styling">
+<meta name="flags" content="ahem">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" >
+<link rel="match" href="initial-letter-with-tab-ref.html">
+<style>
+    .sample {
+        font-family: Ahem;
+        font-size: 20px;
+        line-height: 24px;
+    }
+
+    .initial-letter::first-letter {
+        initial-letter: 3 drop;
+        color: lime;
+        font-size: 100px;   /* should be ignored in rendering */
+        line-height: 50px;  /* should be ignored in rendering */
+    }
+
+    .sample { white-space: pre; }
+    .initial-letter::first-letter { background: yellow; }
+</style>
+</head>
+<body>
+<div class="sample initial-letter">&#9;Abc
+def
+ghi
+jkl
+mno</div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner-static-pos.html b/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner-static-pos.html
index 9b2b996233c..d257016a251 100644
--- a/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner-static-pos.html
+++ b/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner-static-pos.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <title>Abspos element after a column spanner</title>
-<link rel="help" href="href=https://drafts.csswg.org/css-multicol/">
+<link rel="help" href="https://drafts.csswg.org/css-multicol/">
 <link rel="match" href="../reference/ref-filled-green-100px-square.xht">
 <style>
   .multicol {
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner.html b/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner.html
index caed4169757..98664b50cc1 100644
--- a/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner.html
+++ b/tests/wpt/web-platform-tests/css/css-multicol/abspos-after-spanner.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <title>Abspos element after a column spanner</title>
-<link rel="help" href="href=https://drafts.csswg.org/css-multicol/">
+<link rel="help" href="https://drafts.csswg.org/css-multicol/">
 <link rel="match" href="../reference/ref-filled-green-100px-square.xht">
 <style>
   .multicol {
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/abspos-containing-block-outside-spanner.html b/tests/wpt/web-platform-tests/css/css-multicol/abspos-containing-block-outside-spanner.html
index ed832d39f62..1f0419d9c98 100644
--- a/tests/wpt/web-platform-tests/css/css-multicol/abspos-containing-block-outside-spanner.html
+++ b/tests/wpt/web-platform-tests/css/css-multicol/abspos-containing-block-outside-spanner.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <title>Abspos elements nested inside a column spanner</title>
-<link rel="help" href="href=https://drafts.csswg.org/css-multicol/">
+<link rel="help" href="https://drafts.csswg.org/css-multicol/">
 <link rel="match" href="abspos-containing-block-outside-spanner-ref.html">
 <br><br><br><br><br>
 <p>There should be no red.</p>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/historical.html b/tests/wpt/web-platform-tests/css/css-typed-om/historical.html
new file mode 100644
index 00000000000..ceb4dfe5677
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/historical.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Historical features</title>
+<link rel=help href="https://drafts.css-houdini.org/css-typed-om/">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  // https://github.com/w3c/css-houdini-drafts/commit/5261c1a323ea062d69cb5a3f1e69734fd176948a
+  assert_false("CSSPositionValue" in self);
+}, "Support for CSSPositionValue");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/resources/testhelper.js b/tests/wpt/web-platform-tests/css/css-typed-om/resources/testhelper.js
index 89849a7cc2f..c22a963a938 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/resources/testhelper.js
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/resources/testhelper.js
@@ -80,10 +80,6 @@ function assert_style_value_equals(a, b) {
       assert_equals(a.variable, b.variable);
       assert_style_value_equals(a.fallback, b.fallback);
       break;
-    case 'CSSPositionValue':
-      assert_style_value_equals(a.x, b.x);
-      assert_style_value_equals(a.y, b.y);
-      break;
     case 'CSSTransformValue':
       assert_style_value_array_equals(a, b);
       break;
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-normalization/positionvalue-normalization.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-normalization/positionvalue-normalization.tentative.html
deleted file mode 100644
index 8631c054da9..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-normalization/positionvalue-normalization.tentative.html
+++ /dev/null
@@ -1,66 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>CSSPositionValue normalization tests</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#positionvalue-normalization">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../resources/testhelper.js"></script>
-<body>
-<script>
-'use strict';
-
-const gSingleTestCases = [
-  { cssText: 'left', x: CSS.percent(0), y: CSS.percent(50) },
-  { cssText: 'right', x: CSS.percent(100), y: CSS.percent(50) },
-  { cssText: 'center', x: CSS.percent(50), y: CSS.percent(50) },
-  { cssText: 'top', x: CSS.percent(50), y: CSS.percent(0) },
-  { cssText: 'bottom', x: CSS.percent(50), y: CSS.percent(100) },
-  { cssText: '3.14px', x: CSS.px(3.14), y: CSS.percent(50) },
-  { cssText: '25%', x: CSS.percent(25), y: CSS.percent(50) },
-];
-
-const gXTestCases = [
-  { cssText: 'left', x: CSS.percent(0), type: 'ident' },
-  { cssText: 'center', x: CSS.percent(50), type: 'ident' },
-  { cssText: 'right', x: CSS.percent(100), type: 'ident' },
-  { cssText: '3.14px', x: CSS.px(3.14), type: 'length' },
-  { cssText: '10%', x: CSS.percent(10), type: 'length' },
-  { cssText: 'calc(1px + 1em)', x: new CSSMathSum(CSS.px(1), CSS.em(1)), type: 'length' },
-  { cssText: 'left 3.14px', x: CSS.px(3.14), type: 'offset' },
-  { cssText: 'right 3.14px', x: CSS.percent(100).sub(CSS.px(3.14)), type: 'offset' },
-];
-
-const gYTestCases = [
-  { cssText: 'top', y: CSS.percent(0), type: 'ident' },
-  { cssText: 'center', y: CSS.percent(50), type: 'ident' },
-  { cssText: 'bottom', y: CSS.percent(100), type: 'ident' },
-  { cssText: '3.14px', y: CSS.px(3.14), type: 'length' },
-  { cssText: '10%', y: CSS.percent(10), type: 'length' },
-  { cssText: 'calc(1px + 1em)', y: new CSSMathSum(CSS.px(1), CSS.em(1)), type: 'length' },
-  { cssText: 'top 3.14px', y: CSS.px(3.14), type: 'offset' },
-  { cssText: 'bottom 3.14px', y: CSS.percent(100).sub(CSS.px(3.14)), type: 'offset' },
-];
-
-for (const {cssText, x, y} of gSingleTestCases) {
-    test(t => {
-      const styleMap = createInlineStyleMap(t, 'object-position: ' + cssText);
-      assert_style_value_equals(styleMap.get('object-position'), new CSSPositionValue(x, y));
-    }, 'CSS <position> value "' + cssText + '" normalizes to CSSPositionValue');
-}
-
-for (const {cssText: xCssText, x, type: xType} of gXTestCases) {
-  for (const {cssText: yCssText, y, type: yType} of gYTestCases) {
-    const cssText = xCssText + ' ' + yCssText;
-
-    // Can't have position values with 3 parts
-    if ((xType === 'offset') !== (yType === 'offset'))
-      continue;
-
-    test(t => {
-      const styleMap = createInlineStyleMap(t, 'object-position: ' + cssText);
-      assert_style_value_equals(styleMap.get('object-position'), new CSSPositionValue(x, y));
-    }, 'CSS <position> value "' + cssText + '" normalizes to CSSPositionValue');
-  }
-}
-
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssPositionValue.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssPositionValue.html
deleted file mode 100644
index c93b2f1a9b4..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-serialization/cssPositionValue.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>IDL-constructed CSSPositionValue serialization tests</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#positionvalue-serialization">
-<meta name="assert" content="Test CSSPositionValues are serialized by concatenating their coordinate values" />
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../resources/testhelper.js"></script>
-<body>
-<div id="log">
-<script>
-'use strict';
-
-test(() => {
-  assert_equals(new CSSPositionValue(CSS.px(1), CSS.percent(-3.14)).toString(), '1px -3.14%');
-}, 'CSSPositionValue with length and percent serializes by concantenating x and y');
-
-test(() => {
-  let result = CSSStyleValue.parse('object-position', '1px 1px');
-  result.x = CSS.percent(-3.14);
-  assert_equals(result.toString(), '-3.14% 1px');
-}, 'CSSPositionValue from DOMString modified by "x" setter serializes to its new value');
-
-test(() => {
-  let result = CSSStyleValue.parse('object-position', '1px 1px');
-  result.y = CSS.percent(-3.14);
-  assert_equals(result.toString(), '1px -3.14%');
-}, 'CSSPositionValue from DOMString modified by "y" setter serializes to its new value');
-
-test(t => {
-  let result = createInlineStyleMap(t, 'object-position: 1px 1px').get('object-position');
-  result.x = CSS.percent(-3.14);
-  assert_equals(result.toString(), '-3.14% 1px');
-}, 'CSSPositionValue from CSSOM modified by "x" setter serializes to its new value');
-
-test(t => {
-  let result = createInlineStyleMap(t, 'object-position: 1px 1px').get('object-position');
-  result.y = CSS.percent(-3.14);
-  assert_equals(result.toString(), '1px -3.14%');
-}, 'CSSPositionValue from CSSOM modified by "y" setter serializes to its new value');
-
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-invalid.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-invalid.html
deleted file mode 100644
index 9ff9f014e19..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue-invalid.html
+++ /dev/null
@@ -1,67 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>CSSPositionValue Error Handling</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#positionvalue-objects">
-<meta name="assert" content="Test CSSPositionValue constructor and attributes error handling" />
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<body>
-<div id="log">
-<script>
-'use strict';
-
-const gTestArguments = [
-  {
-    description: 'a keyword',
-    value: 'auto',
-  },
-  {
-    description: 'a double',
-    value: 3.14,
-  },
-  {
-    description: 'a unitless zero',
-    value: 0,
-  },
-  {
-    description: 'a string length',
-    value: '10px',
-  },
-  {
-    description: 'a number CSSUnitValue',
-    value: CSS.number(10),
-  },
-  {
-    description: 'a time CSSUnitValue',
-    value: CSS.s(10),
-  },
-  {
-    description: 'a CSSMathValue of angle type',
-    value: new CSSMathSum(CSS.deg(1)),
-  },
-];
-
-for (const {value, description} of gTestArguments) {
-  test(() => {
-    assert_throws_js(TypeError, () => new CSSPositionValue(value, CSS.px(0)));
-    assert_throws_js(TypeError, () => new CSSPositionValue(CSS.px(0), value));
-  }, `Constructing a CSSPositionValue with ${description} throws a TypeError`);
-
-  test(() => {
-    let position = new CSSPositionValue(CSS.px(0), CSS.px(0));
-    assert_throws_js(TypeError, () => position.x = value);
-
-    assert_equals(position.x.value, 0,
-        'X member should not have changed');
-  }, `Updating CSSPositionValue.x with ${description} throws a TypeError`);
-
-  test(() => {
-    let position = new CSSPositionValue(CSS.px(0), CSS.px(0));
-    assert_throws_js(TypeError, () => position.y = value);
-
-    assert_equals(position.y.value, 0,
-        'Y member should not have changed');
-  }, `Updating CSSPositionValue.y with ${description} throws a TypeError`);
-}
-
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue.html b/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue.html
deleted file mode 100644
index a780a86e0b2..00000000000
--- a/tests/wpt/web-platform-tests/css/css-typed-om/stylevalue-subclasses/cssPositionValue.html
+++ /dev/null
@@ -1,61 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>CSSPositionValue</title>
-<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#positionvalue-objects">
-<meta name="assert" content="Test CSSPositionValue constructor and attributes" />
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../resources/testhelper.js"></script>
-<body>
-<div id="log">
-<script>
-'use strict';
-
-const gTestArguments = [
-  {
-    description: 'a length CSSUnitValue' ,
-    value: CSS.px(1),
-  },
-  {
-    description: 'a percent CSSUnitValue' ,
-    value: CSS.percent(10),
-  },
-  {
-    description: 'a CSSMathValue of length type' ,
-    value: new CSSMathSum(CSS.px(1)),
-  },
-  {
-    description: 'a CSSMathValue of percent type' ,
-    value: new CSSMathSum(CSS.percent(1)),
-  },
-];
-
-for (const {value, description} of gTestArguments) {
-  test(() => {
-    const position = new CSSPositionValue(value, value);
-    assert_style_value_equals(position.x, value,
-        'X member should be same as passed in constructor');
-    assert_style_value_equals(position.y, value,
-        'Y member should be same as passed in constructor');
-  }, 'CSSPositionValue can be constructed from ' + description);
-}
-
-for (const {value, description} of gTestArguments) {
-  test(() => {
-    let position = new CSSPositionValue(CSS.px(0), CSS.px(0));
-    position.x = value;
-
-    assert_style_value_equals(position.x, value,
-        'X member should be updated to new value');
-  }, 'CSSPositionValue.x can be updated to ' + description);
-
-  test(() => {
-    let position = new CSSPositionValue(CSS.px(0), CSS.px(0));
-    position.y = value;
-
-    assert_style_value_equals(position.y, value,
-        'Y member should be updated to new value');
-  }, 'CSSPositionValue.y can be updated to ' + description);
-}
-
-</script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/computed.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/computed.tentative.html
index 8d563777cba..a059787ca12 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/computed.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/computed.tentative.html
@@ -35,7 +35,7 @@ test(() => {
 
 test(() => {
   const result = styleMap.get('--foo');
-  assert_style_value_equals(result, new CSSUnparsedValue([' auto']));
+  assert_style_value_equals(result, new CSSUnparsedValue(['auto']));
 }, 'Computed StylePropertyMap contains custom property declarations in style rules');
 
 test(() => {
@@ -45,7 +45,7 @@ test(() => {
 
 test(() => {
   const result = styleMap.get('--bar');
-  assert_style_value_equals(result, new CSSUnparsedValue([' 5']));
+  assert_style_value_equals(result, new CSSUnparsedValue(['5']));
 }, 'Computed StylePropertyMap contains custom property declarations in inline rules');
 
 test(() => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/get.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/get.html
index 3e061e1cbe4..88fe53493cb 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/get.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/get.html
@@ -24,7 +24,7 @@ test(t => {
 test(t => {
   const styleMap = createComputedStyleMap(t, '--foo: auto; --bar: 10px');
   assert_style_value_equals(styleMap.get('--foo'),
-      new CSSUnparsedValue([' auto']));
+      new CSSUnparsedValue(['auto']));
 }, 'Getting a valid custom property from computed style returns the ' +
    'correct entry');
 
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/getAll.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/getAll.tentative.html
index 1673a52bc0c..e6d86ac7b67 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/getAll.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/getAll.tentative.html
@@ -31,7 +31,7 @@ test(t => {
 
 test(t => {
   const styleMap = createComputedStyleMap(t, '--foo: auto; --bar: 10px');
-  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue([' auto'])]);
+  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue(['auto'])]);
 }, 'Calling StylePropertyMap.getAll with a valid custom property returns a single element list with the correct entry');
 
 test(t => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/iterable.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/iterable.tentative.html
index bd11dd28a7e..55e4353708b 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/iterable.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/computed/iterable.tentative.html
@@ -41,9 +41,9 @@ test(t => {
 
 test(t => {
   const styleMap = createComputedStyleMap(t, '--A: A; --C: C; color: red; --B: B;');
-  assert_style_value_array_equals(findInStyleMap(styleMap, '--A'), [new CSSUnparsedValue([' A'])]);
-  assert_style_value_array_equals(findInStyleMap(styleMap, '--B'), [new CSSUnparsedValue([' B'])]);
-  assert_style_value_array_equals(findInStyleMap(styleMap, '--C'), [new CSSUnparsedValue([' C'])]);
+  assert_style_value_array_equals(findInStyleMap(styleMap, '--A'), [new CSSUnparsedValue(['A'])]);
+  assert_style_value_array_equals(findInStyleMap(styleMap, '--B'), [new CSSUnparsedValue(['B'])]);
+  assert_style_value_array_equals(findInStyleMap(styleMap, '--C'), [new CSSUnparsedValue(['C'])]);
 }, 'StylePropertyMap iterator returns custom properties with the correct CSSStyleValue');
 
 test(t => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/declared.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/declared.tentative.html
index 3d857f1b6f9..f6c5dfdb6a9 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/declared.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/declared.tentative.html
@@ -45,7 +45,7 @@ test(() => {
 }, 'Declared StylePropertyMap does not contain inline styles');
 
 test(() => {
-  assert_style_value_equals(styleMap.get('--foo'), new CSSUnparsedValue([' auto']));
+  assert_style_value_equals(styleMap.get('--foo'), new CSSUnparsedValue(['auto']));
 }, 'Declared StylePropertyMap contains custom property declarations');
 
 test(() => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/get.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/get.html
index c4215cb339e..847b6f6fa7a 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/get.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/get.html
@@ -29,7 +29,7 @@ test(t => {
 test(t => {
   const styleMap = createDeclaredStyleMap(t, '--foo: auto; --bar: 10px');
   assert_style_value_equals(styleMap.get('--foo'),
-      new CSSUnparsedValue([' auto']));
+      new CSSUnparsedValue(['auto']));
 }, 'Getting a valid custom property from CSS rule returns the ' +
    'correct entry');
 
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/getAll.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/getAll.tentative.html
index 97baf08a784..bc557d0a76a 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/getAll.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/getAll.tentative.html
@@ -36,7 +36,7 @@ test(t => {
 
 test(t => {
   const styleMap = createDeclaredStyleMap(t, '--foo: auto; --bar: 10px');
-  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue([' auto'])]);
+  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue(['auto'])]);
 }, 'Calling StylePropertyMap.getAll with a valid custom property returns a single element list with the correct entry');
 
 test(t => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/iterable.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/iterable.tentative.html
index 74a100ab7a5..a13f83716e6 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/iterable.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/declared/iterable.tentative.html
@@ -42,9 +42,9 @@ test(t => {
   const keys = [...styleMap.keys()], values = [...styleMap.values()];
 
   assert_array_equals(keys, ['--A', '--B', '--C']);
-  assert_style_value_array_equals(values[0], [new CSSUnparsedValue([' A'])]);
-  assert_style_value_array_equals(values[1], [new CSSUnparsedValue([' B'])]);
-  assert_style_value_array_equals(values[2], [new CSSUnparsedValue([' C'])]);
+  assert_style_value_array_equals(values[0], [new CSSUnparsedValue(['A'])]);
+  assert_style_value_array_equals(values[1], [new CSSUnparsedValue(['B'])]);
+  assert_style_value_array_equals(values[2], [new CSSUnparsedValue(['C'])]);
 }, 'StylePropertyMap iterator returns custom properties with the correct CSSStyleValue');
 
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/get.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/get.html
index 8588e6eda78..1fcc09be6f2 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/get.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/get.html
@@ -29,7 +29,7 @@ test(t => {
 test(t => {
   const styleMap = createInlineStyleMap(t, '--foo: auto; --bar: 10px');
   assert_style_value_equals(styleMap.get('--foo'),
-      new CSSUnparsedValue([' auto']));
+      new CSSUnparsedValue(['auto']));
 }, 'Getting a valid custom property from inline style returns the ' +
    'correct entry');
 
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/getAll.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/getAll.tentative.html
index 935417ddcc0..027f3e0e6bb 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/getAll.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/getAll.tentative.html
@@ -36,7 +36,7 @@ test(t => {
 
 test(t => {
   const styleMap = createInlineStyleMap(t, '--foo: auto; --bar: 10px');
-  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue([' auto'])]);
+  assert_style_value_array_equals(styleMap.getAll('--foo'), [new CSSUnparsedValue(['auto'])]);
 }, 'Calling StylePropertyMap.getAll with a valid custom property returns a single element list with the correct entry');
 
 test(t => {
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/iterable.tentative.html b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/iterable.tentative.html
index d39fc147eb1..ae4490f4aaa 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/iterable.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/inline/iterable.tentative.html
@@ -42,9 +42,9 @@ test(t => {
   const keys = [...styleMap.keys()], values = [...styleMap.values()];
 
   assert_array_equals(keys, ['--A', '--B', '--C']);
-  assert_style_value_array_equals(values[0], [new CSSUnparsedValue([' A'])]);
-  assert_style_value_array_equals(values[1], [new CSSUnparsedValue([' B'])]);
-  assert_style_value_array_equals(values[2], [new CSSUnparsedValue([' C'])]);
+  assert_style_value_array_equals(values[0], [new CSSUnparsedValue(['A'])]);
+  assert_style_value_array_equals(values[1], [new CSSUnparsedValue(['B'])]);
+  assert_style_value_array_equals(values[2], [new CSSUnparsedValue(['C'])]);
 }, 'StylePropertyMap iterator returns custom properties with the correct CSSStyleValue');
 
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/properties/resources/testsuite.js b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/properties/resources/testsuite.js
index 0ec25662c23..1f4195353d1 100644
--- a/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/properties/resources/testsuite.js
+++ b/tests/wpt/web-platform-tests/css/css-typed-om/the-stylepropertymap/properties/resources/testsuite.js
@@ -226,15 +226,6 @@ const gTestSyntaxExamples = {
       }
     ],
   },
-  '<position>': {
-    description: 'a position',
-    examples: [
-      {
-        decription: "origin position",
-        input: new CSSPositionValue(new CSSUnitValue(0, 'px'), new CSSUnitValue(0, 'px'))
-      }
-    ],
-  },
   '<url>': {
     description: 'a URL',
     examples: [
diff --git a/tests/wpt/web-platform-tests/css/css-ui/compute-kind-widget-no-fallback-props-001.html b/tests/wpt/web-platform-tests/css/css-ui/compute-kind-widget-no-fallback-props-001.html
index e688ab8a9d9..0533da654ff 100644
--- a/tests/wpt/web-platform-tests/css/css-ui/compute-kind-widget-no-fallback-props-001.html
+++ b/tests/wpt/web-platform-tests/css/css-ui/compute-kind-widget-no-fallback-props-001.html
@@ -38,7 +38,7 @@
 <script>
 // Set author-level CSS that matches UA style, but don't use the 'revert' value.
 const elements = document.querySelectorAll('#container > *');
-const fallbackProps = [
+const fallbackProps = new Set([
   'background-color',
   'border-top-color',
   'border-top-style',
@@ -83,17 +83,27 @@ const fallbackProps = [
   'border-start-end-radius',
   'border-end-start-radius',
   'border-end-end-radius',
-];
+]);
+
+let mutations = []
 
 // Make sure that any supported property that is not in the above list
 // does not affect the widget type.
 const declarations = getComputedStyle(document.documentElement);
+
 for (const prop of declarations) {
-  if (fallbackProps.includes(prop)) {
+  if (fallbackProps.has(prop)) {
     continue;
   }
   for (const el of elements) {
-    el.style.setProperty(prop, getComputedStyle(el).getPropertyValue(prop));
+    mutations.push([el, prop, getComputedStyle(el).getPropertyValue(prop)]);
   }
 }
+
+// Batch all setProperty calls together (without calling gCS().getPropertyValue
+// for each mutation) to avoid excessive style recalcs.
+for (let mutation of mutations) {
+  const [el, prop, value] = mutation;
+  el.style.setProperty(prop, value);
+}
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-group.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-group.html
new file mode 100644
index 00000000000..034df41dde1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-group.html
@@ -0,0 +1,100 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: ensure :only-child is supported on view-transition-group</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition-group(root) {
+  background-color: blue;
+}
+::view-transition-group(target) {
+  background-color: blue;
+}
+::view-transition-group(*) {
+  color: blue;
+}
+
+::view-transition-group(root):only-child {
+  background-color: red;
+}
+::view-transition-group(target):only-child {
+  background-color: red;
+}
+::view-transition-group(*):only-child {
+  color: red;
+}
+
+div {
+  contain: layout;
+}
+</style>
+<div id="target"></div>
+<div id="target2"></div>
+
+<script>
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-group(root)");
+      if (style.backgroundColor == "rgb(255, 0, 0)" && style.color == "rgb(255, 0, 0)")
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-group is generated for root element only");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "target";
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-group(root)");
+      if (style.backgroundColor == "rgb(0, 0, 255)" && style.color == "rgb(0, 0, 255)")
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-group is generated for multiple elements");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "none";
+    target.style.viewTransitionName = "target";
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-group(target)");
+      if (style.backgroundColor == "rgb(255, 0, 0)" && style.color == "rgb(255, 0, 0)")
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-group is generated for sub element only");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "none";
+    target.style.viewTransitionName = "target";
+    target2.style.viewTransitionName = "target2";
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-group(target)");
+      if (style.backgroundColor == "rgb(0, 0, 255)" && style.color == "rgb(0, 0, 255)")
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-group is generated for multiple sub elements");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-image-pair.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-image-pair.html
new file mode 100644
index 00000000000..830b37313ea
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-image-pair.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: ensure :only-child is supported on view-transition-image-pair</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition-image-pair(root):only-child {
+  background-color: red;
+}
+::view-transition-image-pair(*):only-child {
+  color: red;
+}
+</style>
+
+<script>
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-image-pair(root)");
+      if (style.backgroundColor == "rgb(255, 0, 0)" && style.color == "rgb(255, 0, 0)")
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should always match for ::view-transition-image-pair");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-new.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-new.html
new file mode 100644
index 00000000000..2f8a7a4023e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-new.html
@@ -0,0 +1,153 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: ensure :only-child is supported on view-transition-new</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition-new(root) {
+  background-color: blue;
+}
+::view-transition-new(target) {
+  background-color: blue;
+}
+::view-transition-new(*) {
+  color: blue;
+}
+
+::view-transition-new(root):only-child {
+  background-color: red;
+}
+::view-transition-new(target):only-child {
+  background-color: red;
+}
+::view-transition-new(*):only-child {
+  color: red;
+}
+
+#target {
+  contain: layout;
+}
+
+</style>
+<div id="target"></div>
+
+<script>
+let matchedColor = "rgb(255, 0, 0)";
+let notMatchedColor = "rgb(0, 0, 255)";
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "none";
+    target.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      document.documentElement.style.viewTransitionName = "root";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(root)");
+      if (style.backgroundColor == matchedColor && style.color == matchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-old is not generated (none to root)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "root";
+    target.style.viewTransitionName = "none";
+    let transition = document.startViewTransition();
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-old is generated (root to root)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "none";
+    target.style.viewTransitionName = "root";
+    let transition = document.startViewTransition(() => {
+       document.documentElement.style.viewTransitionName = "root";
+       target.style.viewTransitionName = "none";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-old is generated (element to root)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "none";
+    document.documentElement.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      target.style.viewTransitionName = "target";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(target)");
+      if (style.backgroundColor == matchedColor && style.color == matchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-old is not generated (none to element)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "none";
+    document.documentElement.style.viewTransitionName = "root";
+    let transition = document.startViewTransition(() => {
+      document.documentElement.style.viewTransitionName = "none";
+      target.style.viewTransitionName = "element";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-old is generated (root to element)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "target";
+    document.documentElement.style.viewTransitionName = "none";
+    let transition = document.startViewTransition();
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-new(target)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-old is generated (element to element)");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-no-transition.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-no-transition.html
new file mode 100644
index 00000000000..7dc2bf12176
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-no-transition.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: :only-child style queries without transition shouldn't crash</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition:only-child,
+::view-transition-group(*):only-child,
+::view-transition-image-pair(*):only-child,
+::view-transition-old(*):only-child,
+::view-transition-new(*):only-child {
+  background-color: blue;
+}
+</style>
+
+<script>
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    let elements = [
+      "view-transition",
+      "view-transition-group(foo)",
+      "view-transition-image-pair(foo)",
+      "view-transition-old(foo)",
+      "view-transition-old(foo)"
+    ];
+
+    for (let i = 0; i < elements.length; i++) {
+      let style = window.getComputedStyle(document.documentElement, elements[i]);
+      if (style.backgroundColor == "rgb(0, 0, 255")
+        reject();
+    }
+    resolve();
+  });
+}, ":only-child style queries without transition shouldn't crash");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-old.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-old.html
new file mode 100644
index 00000000000..4ca6fed20ce
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-old.html
@@ -0,0 +1,153 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: ensure :only-child is supported on view-transition-old</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition-old(root) {
+  background-color: blue;
+}
+::view-transition-old(target) {
+  background-color: blue;
+}
+::view-transition-old(*) {
+  color: blue;
+}
+
+::view-transition-old(root):only-child {
+  background-color: red;
+}
+::view-transition-old(target):only-child {
+  background-color: red;
+}
+::view-transition-old(*):only-child {
+  color: red;
+}
+
+#target {
+  contain: layout;
+}
+
+</style>
+<div id="target"></div>
+
+<script>
+let matchedColor = "rgb(255, 0, 0)";
+let notMatchedColor = "rgb(0, 0, 255)";
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "root";
+    target.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      document.documentElement.style.viewTransitionName = "none";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(root)");
+      if (style.backgroundColor == matchedColor && style.color == matchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-new is not generated (root to none)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "root";
+    target.style.viewTransitionName = "none";
+    let transition = document.startViewTransition();
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-new is generated (root to root)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    document.documentElement.style.viewTransitionName = "root";
+    target.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      document.documentElement.style.viewTransitionName = "none";
+      target.style.viewTransitionName = "root";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-new is generated (root to element)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "target";
+    document.documentElement.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      target.style.viewTransitionName = "none";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(target)");
+      if (style.backgroundColor == matchedColor && style.color == matchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should match because ::view-transition-new is not generated (element to none)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "root";
+    document.documentElement.style.viewTransitionName = "none";
+    let transition = document.startViewTransition(() => {
+      document.documentElement.style.viewTransitionName = "root";
+      target.style.viewTransitionName = "none";
+    });
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(root)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-new is generated (element to root)");
+
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    target.style.viewTransitionName = "target";
+    document.documentElement.style.viewTransitionName = "none";
+    let transition = document.startViewTransition();
+
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition-old(target)");
+      if (style.backgroundColor == notMatchedColor && style.color == notMatchedColor)
+        resolve();
+      else
+        reject(style.backgroundColor + " and " + style.color);
+    });
+  });
+}, ":only-child should not match because ::view-transition-new is generated (element to element)");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-view-transition.html b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-view-transition.html
new file mode 100644
index 00000000000..d338a042caf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/only-child-view-transition.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: ensure :only-child is supported on view-transition</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<style>
+::view-transition {
+  background-color: red;
+}
+::view-transition:only-child {
+  background-color: blue;
+}
+</style>
+
+<script>
+promise_test(() => {
+  return new Promise(async (resolve, reject) => {
+    let transition = document.startViewTransition();
+    transition.ready.then(() => {
+      let style = getComputedStyle(
+        document.documentElement, ":view-transition");
+      if (style.backgroundColor == "rgb(255, 0, 0)")
+        resolve();
+      else
+        reject(style.backgroundColor);
+    });
+  });
+}, ":only-child is not supported on view-transition");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-computed-style.optional.html b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-computed-style.optional.html
new file mode 100644
index 00000000000..58e1daee471
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-computed-style.optional.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#the-meter-element-2">
+<title>Meter appearance native writing mode computed style</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<meter value="40" min="0" max="100" style="writing-mode: horizontal-tb"></meter>
+<meter value="40" min="0" max="100" style="writing-mode: vertical-lr"></meter>
+<meter value="40" min="0" max="100" style="writing-mode: vertical-rl"></meter>
+
+<script>
+test(() => {
+  const meter = document.querySelector(`meter[style="writing-mode: horizontal-tb"]`);
+  const style = getComputedStyle(meter);
+  assert_equals(style.blockSize, "16px");
+  assert_equals(style.inlineSize, "80px");
+  assert_equals(style.blockSize, style.height);
+  assert_equals(style.inlineSize, style.width);
+}, `meter[style="writing-mode: horizontal-tb"] block size should match height and inline size should match width`);
+
+for (const writingMode of ["vertical-lr", "vertical-rl"]) {
+  test(() => {
+    const meter = document.querySelector(`meter[style="writing-mode: ${writingMode}"]`);
+    const style = getComputedStyle(meter);
+    assert_equals(style.blockSize, "16px");
+    assert_equals(style.inlineSize, "80px");
+    assert_equals(style.blockSize, style.width);
+    assert_equals(style.inlineSize, style.height);
+  }, `meter[style="writing-mode: ${writingMode}"] block size should match width and inline size should match height`);
+};
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-horizontal.optional.html b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-horizontal.optional.html
new file mode 100644
index 00000000000..7b25e1a9000
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-horizontal.optional.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/#the-meter-element">
+<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#block-flow">
+<title>Meter appearance native writing mode horizontal</title>
+<meta charset="utf-8">
+<link rel="mismatch" href="meter-appearance-native-vertical.optional.html">
+
+<!-- Note test description should be the same across all files to mismatch on. -->
+<p>The meter element below should match the correct writing mode.</p>
+<meter value="70" min="0" max="100" style="writing-mode: horizontal-tb"></meter>
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-vertical.optional.html b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-vertical.optional.html
new file mode 100644
index 00000000000..6beca6bfa15
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/meter-appearance-native-vertical.optional.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
+<link rel="help" href="https://html.spec.whatwg.org/#the-meter-element">
+<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#block-flow">
+<title>Meter appearance native writing mode horizontal</title>
+<meta charset="utf-8">
+<link rel="mismatch" href="meter-appearance-native-horizontal.optional.html">
+
+<!-- Note test description should be the same across all files to mismatch on. -->
+<p>The meter element below should match the correct writing mode.</p>
+<meter value="70" min="0" max="100" style="writing-mode: vertical-rl"></meter>
diff --git a/tests/wpt/web-platform-tests/css/css-writing-modes/forms/progress-appearance-native-computed-style.optional.html b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/progress-appearance-native-computed-style.optional.html
index 6bb48bf1984..47cd65ecf75 100644
--- a/tests/wpt/web-platform-tests/css/css-writing-modes/forms/progress-appearance-native-computed-style.optional.html
+++ b/tests/wpt/web-platform-tests/css/css-writing-modes/forms/progress-appearance-native-computed-style.optional.html
@@ -17,7 +17,7 @@ test(() => {
   assert_equals(style.inlineSize, "160px");
   assert_equals(style.blockSize, style.height);
   assert_equals(style.inlineSize, style.width);
-}, `progress[style="writing-mode: horizontal-tb"] block size should match height and inline should match width`);
+}, `progress[style="writing-mode: horizontal-tb"] block size should match height and inline size should match width`);
 
 for (const writingMode of ["vertical-lr", "vertical-rl"]) {
   test(() => {
@@ -27,6 +27,6 @@ for (const writingMode of ["vertical-lr", "vertical-rl"]) {
     assert_equals(style.inlineSize, "160px");
     assert_equals(style.blockSize, style.width);
     assert_equals(style.inlineSize, style.height);
-  }, `progress[style="writing-mode: ${writingMode}"] block size should match width and inline should match width`);
+  }, `progress[style="writing-mode: ${writingMode}"] block size should match width and inline size should match height`);
 };
 </script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/custom-elements/cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/custom-elements/cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..3067a7af9d2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/custom-elements/cross-realm-callback-report-exception.html
@@ -0,0 +1,83 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Exceptions raised in constructors / lifecycle callbacks are reported in their global objects</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+const sourceThrowError = `throw new parent.frames[2].Error("PASS")`;
+
+test(t => {
+  window.onerrorCalls = [];
+
+  const XFoo = new frames[1].Function(sourceThrowError);
+  frames[0].customElements.define("x-foo-constructor", XFoo);
+
+  frames[0].document.createElement("x-foo-constructor");
+  assert_array_equals(onerrorCalls, ["frame1"]);
+}, "constructor");
+
+test(t => {
+  window.onerrorCalls = [];
+
+  const XFooConnected = class extends frames[0].HTMLElement {};
+  XFooConnected.prototype.connectedCallback = new frames[1].Function(sourceThrowError);
+  frames[0].customElements.define("x-foo-connected", XFooConnected);
+
+  const el = frames[0].document.createElement("x-foo-connected");
+  frames[0].document.body.append(el);
+
+  assert_array_equals(onerrorCalls, ["frame1"]);
+}, "connectedCallback");
+
+test(t => {
+  window.onerrorCalls = [];
+
+  const XFooDisconnected = class extends frames[0].HTMLElement {};
+  XFooDisconnected.prototype.disconnectedCallback = new frames[1].Function(sourceThrowError);
+  frames[0].customElements.define("x-foo-disconnected", XFooDisconnected);
+
+  const el = frames[0].document.createElement("x-foo-disconnected");
+  frames[0].document.body.append(el);
+  el.remove();
+
+  assert_array_equals(onerrorCalls, ["frame1"]);
+}, "disconnectedCallback");
+
+test(t => {
+  window.onerrorCalls = [];
+
+  const XFooAttributeChanged = class extends frames[0].HTMLElement {};
+  XFooAttributeChanged.observedAttributes = ["foo"];
+  XFooAttributeChanged.prototype.attributeChangedCallback = new frames[1].Function(sourceThrowError);
+  frames[0].customElements.define("x-foo-attribute-changed", XFooAttributeChanged);
+
+  const el = frames[0].document.createElement("x-foo-attribute-changed");
+  frames[0].document.body.append(el);
+  el.setAttribute("foo", "bar");
+
+  assert_array_equals(onerrorCalls, ["frame1"]);
+}, "attributeChangedCallback");
+
+test(t => {
+  window.onerrorCalls = [];
+
+  const XFooAdopted = class extends frames[0].HTMLElement {};
+  XFooAdopted.prototype.adoptedCallback = new frames[1].Function(sourceThrowError);
+  frames[0].customElements.define("x-foo-adopted", XFooAdopted);
+
+  const el = frames[0].document.createElement("x-foo-adopted");
+  document.body.append(el);
+
+  assert_array_equals(onerrorCalls, ["frame1"]);
+}, "adoptedCallback");
+</script>
diff --git a/tests/wpt/web-platform-tests/dom/events/event-global-is-still-set-when-reporting-exception-onerror.html b/tests/wpt/web-platform-tests/dom/events/event-global-is-still-set-when-reporting-exception-onerror.html
new file mode 100644
index 00000000000..ceaac4fe2b2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/dom/events/event-global-is-still-set-when-reporting-exception-onerror.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>window.onerror handler restores window.event after it reports an exception</title>
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-event-listener-inner-invoke">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<iframe src="resources/empty-document.html"></iframe>
+<iframe src="resources/empty-document.html"></iframe>
+
+<script>
+setup({ allow_uncaught_exception: true });
+
+async_test(t => {
+    window.onload = t.step_func_done(onLoadEvent => {
+        frames[0].onerror = new frames[1].Function(`
+            top.eventDuringSecondOnError = top.window.event;
+            top.frames[0].eventDuringSecondOnError = top.frames[0].event;
+            top.frames[1].eventDuringSecondOnError = top.frames[1].event;
+        `);
+
+        window.onerror = new frames[0].Function(`
+            top.eventDuringFirstOnError = top.window.event;
+            top.frames[0].eventDuringFirstOnError = top.frames[0].event;
+            top.frames[1].eventDuringFirstOnError = top.frames[1].event;
+
+            foo; // cause second onerror
+        `);
+
+        const myEvent = new ErrorEvent("error", { error: new Error("myError") });
+        window.dispatchEvent(myEvent);
+
+        assert_equals(top.eventDuringFirstOnError, onLoadEvent);
+        assert_equals(frames[0].eventDuringFirstOnError, myEvent);
+        assert_equals(frames[1].eventDuringFirstOnError, undefined);
+
+        assert_equals(top.eventDuringSecondOnError, onLoadEvent);
+        assert_equals(frames[0].eventDuringSecondOnError, myEvent);
+        assert_equals(frames[1].eventDuringSecondOnError.error.name, "ReferenceError");
+    });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html b/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
index fd9418eb703..acad168e56c 100644
--- a/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
+++ b/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
@@ -81,12 +81,20 @@ function runTest() {
         'on target.');
     assert_equals(target_div.scrollLeft, 0);
 
-    // Scroll up on target div and wait for the element with overscroll-y to get
-    // scrollend event.
+    let touchEndPromise = new Promise((resolve) => {
+      target_div.addEventListener("touchend", resolve);
+    });
     await touchScrollInTarget(300, target_div, 'up');
-    await waitFor(() => { return vertical_scrollend_arrived; },
-        'Expected element did not receive scrollend event after scroll up on ' +
-        'target.');
+
+    // The scrollend event should never be fired before the gesture has completed.
+    await touchEndPromise;
+
+    // Ensure we wait at least a tick after the touch end.
+    await waitForCompositorCommit();
+
+    // We should not trigger a scrollend event for a scroll that did not change
+    // the scroll position.
+    assert_equals(vertical_scrollend_arrived, false);
     assert_equals(target_div.scrollTop, 0);
   }, 'Tests that the last element in the cut scroll chain gets scrollend ' +
      'event when no element scrolls by touch.');
diff --git a/tests/wpt/web-platform-tests/dom/nodes/MutationObserver-cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/dom/nodes/MutationObserver-cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..7d05c045b3b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/dom/nodes/MutationObserver-cross-realm-callback-report-exception.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>MutationObserver reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    const target = frames[0].document.body;
+    const mo = new frames[0].MutationObserver(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+
+    mo.observe(target, { childList: true, subtree: true });
+    target.append("foo");
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 4);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.html b/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.html
deleted file mode 100644
index 55fbb070a3b..00000000000
--- a/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.html
+++ /dev/null
@@ -1,67 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>Cross-realm XPathNSResolver throws TypeError of its associated Realm</title>
-<link rel="help" href="https://webidl.spec.whatwg.org/#ref-for-prepare-to-run-script">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="resources/invalid_namespace_test.js"></script>
-
-<iframe name="resolverGlobalObject" src="resources/empty-document.html"></iframe>
-
-<script>
-setup({ allow_uncaught_exception: true });
-
-const iframeLoaded = new Promise(resolve => { window.addEventListener("load", resolve); });
-
-promise_test(async t => {
-  await iframeLoaded;
-  const resolver = new resolverGlobalObject.Object;
-
-  return promise_rejects_js(t, resolverGlobalObject.TypeError,
-    invalid_namespace_test(t, resolver, resolverGlobalObject)
-  );
-}, "XPathNSResolver is cross-realm plain object without 'lookupNamespaceURI' property");
-
-promise_test(async t => {
-  await iframeLoaded;
-  const resolver = new resolverGlobalObject.Object;
-  resolver.lookupNamespaceURI = {};
-
-  return promise_rejects_js(t, resolverGlobalObject.TypeError,
-    invalid_namespace_test(t, resolver, resolverGlobalObject)
-  );
-}, "XPathNSResolver is cross-realm plain object with non-callable 'lookupNamespaceURI' property");
-
-promise_test(async t => {
-  await iframeLoaded;
-  const { proxy, revoke } = Proxy.revocable(() => {}, {});
-  revoke();
-
-  const resolver = new resolverGlobalObject.Object;
-  resolver.lookupNamespaceURI = proxy;
-
-  return promise_rejects_js(t, resolverGlobalObject.TypeError,
-    invalid_namespace_test(t, resolver, resolverGlobalObject)
-  );
-}, "XPathNSResolver is cross-realm plain object with revoked Proxy as 'lookupNamespaceURI' property");
-
-promise_test(async t => {
-  await iframeLoaded;
-  const { proxy, revoke } = resolverGlobalObject.Proxy.revocable({}, {});
-  revoke();
-
-  return promise_rejects_js(t, resolverGlobalObject.TypeError,
-    invalid_namespace_test(t, proxy, resolverGlobalObject)
-  );
-}, "XPathNSResolver is cross-realm non-callable revoked Proxy");
-
-promise_test(async t => {
-  await iframeLoaded;
-  const { proxy, revoke } = resolverGlobalObject.Proxy.revocable(() => {}, {});
-  revoke();
-
-  return promise_rejects_js(t, resolverGlobalObject.TypeError,
-    invalid_namespace_test(t, proxy, resolverGlobalObject)
-  );
-}, "XPathNSResolver is cross-realm callable revoked Proxy");
-</script>
diff --git a/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.tentative.html b/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.tentative.html
new file mode 100644
index 00000000000..17f7ea78c3a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/domxpath/resolver-callback-interface-cross-realm.tentative.html
@@ -0,0 +1,94 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Cross-realm XPathNSResolver throws TypeError of its associated Realm</title>
+<link rel="help" href="https://webidl.spec.whatwg.org/#ref-for-prepare-to-run-script">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<iframe name="evaluateGlobalObject" src="resources/empty-document.html"></iframe>
+<iframe name="resolverGlobalObject" src="resources/empty-document.html"></iframe>
+<iframe name="lookupNamespaceURIGlobalObject" src="resources/empty-document.html"></iframe>
+<iframe name="relevantGlobalObject" src="resources/empty-document.html"></iframe>
+<iframe name="incumbentGlobalObject" src="resources/empty-document.html"></iframe>
+
+<script>
+setup({ allow_uncaught_exception: true });
+
+const expectedDOMExceptionType = "NAMESPACE_ERR";
+
+test_onload(() => {
+  const resolver = new resolverGlobalObject.Object;
+
+  assert_reports_exception(() => {
+    assert_throws_dom(expectedDOMExceptionType, evaluateGlobalObject.DOMException, bind_evaluate(resolver));
+  });
+}, "XPathNSResolver is cross-realm plain object without 'lookupNamespaceURI' property");
+
+test_onload(() => {
+  const resolver = new resolverGlobalObject.Object;
+  resolver.lookupNamespaceURI = new lookupNamespaceURIGlobalObject.Object;
+
+  assert_reports_exception(() => {
+    assert_throws_dom(expectedDOMExceptionType, evaluateGlobalObject.DOMException, bind_evaluate(resolver));
+  });
+}, "XPathNSResolver is cross-realm plain object with non-callable 'lookupNamespaceURI' property");
+
+test_onload(() => {
+  const { proxy, revoke } = resolverGlobalObject.Proxy.revocable(new resolverGlobalObject.Object, {});
+  revoke();
+
+  assert_reports_exception(() => {
+    assert_throws_dom(expectedDOMExceptionType, evaluateGlobalObject.DOMException, bind_evaluate(proxy));
+  });
+}, "XPathNSResolver is cross-realm non-callable revoked Proxy");
+
+test_onload(() => {
+  const { proxy, revoke } = resolverGlobalObject.Proxy.revocable(new resolverGlobalObject.Function, {});
+  revoke();
+
+  assert_reports_exception(() => {
+    assert_throws_dom(expectedDOMExceptionType, evaluateGlobalObject.DOMException, bind_evaluate(proxy));
+  });
+}, "XPathNSResolver is cross-realm callable revoked Proxy");
+
+test_onload(() => {
+  const { proxy, revoke } = lookupNamespaceURIGlobalObject.Proxy.revocable(new lookupNamespaceURIGlobalObject.Function, {});
+  revoke();
+
+  const resolver = new resolverGlobalObject.Object;
+  resolver.lookupNamespaceURI = proxy;
+
+  assert_reports_exception(() => {
+    assert_throws_dom(expectedDOMExceptionType, evaluateGlobalObject.DOMException, bind_evaluate(resolver));
+  });
+}, "XPathNSResolver is cross-realm plain object with revoked Proxy as 'lookupNamespaceURI' property");
+
+function test_onload(fn, desc) {
+  async_test(t => { window.addEventListener("load", t.step_func_done(fn)); }, desc);
+}
+
+function assert_reports_exception(fn) {
+  let error;
+  const onErrorHandler = event => {
+    error = event.error;
+    event.preventDefault();
+  };
+
+  resolverGlobalObject.addEventListener("error", onErrorHandler);
+  fn();
+  resolverGlobalObject.removeEventListener("error", onErrorHandler);
+
+  assert_equals(typeof error, "object");
+  assert_equals(error.constructor, evaluateGlobalObject.TypeError);
+}
+
+function bind_evaluate(resolver) {
+  const boundEvaluate = new incumbentGlobalObject.Function("evaluate", "relevantDocument", "resolver", `
+    evaluate.call(relevantDocument, "/foo:bar", relevantDocument.documentElement, resolver);
+  `);
+
+  return () => {
+    boundEvaluate(evaluateGlobalObject.document.evaluate, relevantGlobalObject.document, resolver);
+  };
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/fetch/api/response/response-static-error.any.js b/tests/wpt/web-platform-tests/fetch/api/response/response-static-error.any.js
index 4097eab37b4..1f8c49ab006 100644
--- a/tests/wpt/web-platform-tests/fetch/api/response/response-static-error.any.js
+++ b/tests/wpt/web-platform-tests/fetch/api/response/response-static-error.any.js
@@ -11,6 +11,18 @@ test(function() {
   assert_true(responseError.headers.entries().next().done, "Headers should be empty");
 }, "Check response returned by static method error()");
 
+promise_test (async function() {
+  let response = await fetch("../resources/data.json");
+
+  try {
+    response.headers.append('name', 'value');
+  } catch (e) {
+    assert_equals(e.constructor.name, "TypeError");
+  }
+
+  assert_not_equals(response.headers.get("name"), "value", "response headers should be immutable");
+}, "Ensure response headers are immutable");
+
 test(function() {
   const headers = Response.error().headers;
 
diff --git a/tests/wpt/web-platform-tests/geolocation-API/idlharness.https.window.js b/tests/wpt/web-platform-tests/geolocation-API/idlharness.https.window.js
index 57cbf59d208..eadd6b7a4fb 100644
--- a/tests/wpt/web-platform-tests/geolocation-API/idlharness.https.window.js
+++ b/tests/wpt/web-platform-tests/geolocation-API/idlharness.https.window.js
@@ -6,23 +6,9 @@
 // https://www.w3.org/TR/geolocation-API/
 
 window.onload = async () => {
-  await test_driver.set_permission({ name: "geolocation" }, "denied");
-  const positionError = await new Promise((resolve, reject) => {
-    navigator.geolocation.getCurrentPosition(reject, resolve);
-  });
-
-  await test_driver.set_permission({ name: "geolocation" }, "granted");
-  const position = await new Promise((resolve, reject) => {
-    navigator.geolocation.getCurrentPosition(resolve, reject);
-  });
-
   idl_test(["geolocation"], ["hr-time", "html"], (idl_array) => {
     idl_array.add_objects({
-      Navigator: ["navigator"],
       Geolocation: ["navigator.geolocation"],
-      GeolocationPositionError: [positionError],
-      GeolocationPosition: [position],
-      GeolocationCoordinates: [position.coords],
     });
   });
 };
diff --git a/tests/wpt/web-platform-tests/html/anonymous-iframe/local-storage-initial-empty-document.tentative.https.window.js b/tests/wpt/web-platform-tests/html/anonymous-iframe/local-storage-initial-empty-document.tentative.https.window.js
index fc58aaed908..37678ff12b7 100644
--- a/tests/wpt/web-platform-tests/html/anonymous-iframe/local-storage-initial-empty-document.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/html/anonymous-iframe/local-storage-initial-empty-document.tentative.https.window.js
@@ -60,11 +60,15 @@ promise_test(async test => {
     send("${queue_C}", value_E);
   `);
 
-  // Verify the credentialless iframe and the normal one do not have access to each
-  // other.
-  assert_equals(await receive(queue_B), value_D); // key_D
-  assert_equals(await receive(queue_B), "");      // key_E
-  assert_equals(await receive(queue_C), "");      // key_D
-  assert_equals(await receive(queue_C), value_E); // key_E
-}, "Local storage is correctly partitioned with regards to credentialless iframe " +
-   "in initial empty documents.");
+  // Verify the credentialless iframe and the normal one do not have access to
+  // each other.
+  assert_equals(await receive(queue_B), value_D, // key_D
+    "Credentialless iframe can access credentialless context");
+  assert_equals(await receive(queue_B), "",      // key_E
+    "Credentialless iframe can't access credentialled context");
+  assert_equals(await receive(queue_C), "",      // key_D
+    "Credentialled iframe can't access credentialless context");
+  assert_equals(await receive(queue_C), value_E, // key_E
+    "Credentialled iframe can access credentialled context");
+}, "Local storage is correctly partitioned with regards to credentialless " +
+   "iframe in initial empty documents.");
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..393170baad8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-canvas-element/toBlob-cross-realm-callback-report-exception.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>toBlob() reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe srcdoc="<canvas></canvas>"></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    const canvas = frames[0].document.querySelector("canvas");
+    canvas.toBlob(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 25);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html
new file mode 100644
index 00000000000..237c9c3646b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-embed-element/embed-svg-navigation-resets-size.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Intrinsic sizing of SVG embedded via &lt;embed&gt; should disappear on navigation</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<embed id="element" name="embed" src='data:image/svg+xml,
+  <svg xmlns="http://www.w3.org/2000/svg"
+       xmlns:xlink="http://www.w3.org/1999/xlink"
+       viewBox="0 0 1000 1000"
+       width="400"
+       height="400"
+       font-size="100">
+  </svg>'></embed>
+<script>
+promise_test(async () => {
+  await new Promise(resolve => {
+    onload = resolve;
+  });
+
+  assert_equals(element.scrollWidth, 400, "The width should be determined by the embedded SVG");
+  assert_equals(element.scrollHeight, 400, "The height should be determined by the embedded SVG");
+
+  await new Promise(resolve => {
+    element.onload = resolve;
+    element.src = "about:blank";
+  });
+
+  assert_equals(element.scrollWidth, 300, "The width should be the default");
+  assert_equals(element.scrollHeight, 150, "The height should be the default");
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-move-into-script-disabled-iframe.html b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-move-into-script-disabled-iframe.html
index 10b644e22fd..79bfa243782 100644
--- a/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-move-into-script-disabled-iframe.html
+++ b/tests/wpt/web-platform-tests/html/semantics/embedded-content/the-img-element/image-loading-lazy-move-into-script-disabled-iframe.html
@@ -14,10 +14,7 @@
 </iframe>
 <script>
 promise_test(async t => {
-  const p1 = new Promise(resolve => iframe.addEventListener("load", resolve));
-  const p2 = new Promise(resolve => sandboxediframe.addEventListener("load", resolve));
-
-  await Promise.all([p1, p2]);
+  await new Promise(resolve => window.addEventListener('load', resolve));
 
   const image = iframe.contentDocument.querySelector("img");
 
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01-notref.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01-notref.html
new file mode 100644
index 00000000000..58192bec8e6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01-notref.html
@@ -0,0 +1,3 @@
+<!doctype html>
+<title>LTR range input with datalist reference</title>
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01.html
new file mode 100644
index 00000000000..225422dc4d4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-01.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<title>LTR range input with datalist</title>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#range-state-(type=range)">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=841942">
+<link rel="author" href="mailto:zach@zrhoffman.net" title="Zach Hoffman">
+<link rel="mismatch" href="range-tick-marks-01-notref.html">
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+  <option value="0">
+  <option value="-30">
+  <option value="30">
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02-ref.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02-ref.html
new file mode 100644
index 00000000000..3d5b323470f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02-ref.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<title>RTL range input with datalist reference</title>
+<style>
+  input[type=range] {
+    transform: scaleX(-1);
+  }
+</style>
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+  <option value="0">
+  <option value="-30">
+  <option value="30">
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02.html
new file mode 100644
index 00000000000..453e650b2f6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-02.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<title>RTL range input with datalist</title>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#range-state-(type=range)">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/dom.html#attr-dir-rtl">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=841942">
+<link rel="author" href="mailto:zach@zrhoffman.net" title="Zach Hoffman">
+<link rel="match" href="range-tick-marks-02-ref.html">
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers" dir="rtl">
+<datalist id="powers">
+  <option value="0">
+  <option value="-30">
+  <option value="30">
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03-notref.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03-notref.html
new file mode 100644
index 00000000000..5c15233a316
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03-notref.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<title>max and min attributes applied to range input with datalist reference</title>
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+  <option value="0">
+  <option value="-30">
+  <option value="30">
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03.html
new file mode 100644
index 00000000000..e067013bdd7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-03.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<title>max and min attributes applied to range input with datalist</title>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#range-state-(type=range)">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#the-min-and-max-attributes">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=841942">
+<link rel="author" href="mailto:zach@zrhoffman.net" title="Zach Hoffman">
+<link rel="mismatch" href="range-tick-marks-03-notref.html">
+<input type="range" min="-40" max="40" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+  <option value="0">
+  <option value="-30">
+  <option value="30">
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04-ref.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04-ref.html
new file mode 100644
index 00000000000..a6afaff7eef
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04-ref.html
@@ -0,0 +1,7 @@
+<!doctype html>
+<title>no range tick marks for disabled datalist elements reference</title>
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+    <option value="-30">
+    <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04.html
new file mode 100644
index 00000000000..6fb0e930a1c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range-tick-marks-04.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<title>no range tick marks for disabled datalist elements</title>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#range-state-(type=range)">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/form-elements.html#htmldatalistelement">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/form-elements.html#concept-option-disabled">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=841942">
+<link rel="author" href="mailto:zach@zrhoffman.net" title="Zach Hoffman">
+<link rel="match" href="range-tick-marks-04-ref.html">
+<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers">
+<datalist id="powers">
+  <option value="0" disabled>
+  <option value="-30">
+  <option value="30" disabled>
+  <option value="50">
+</datalist>
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-top-layer-combinations.tentative.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-top-layer-combinations.tentative.html
index d4529b9e39c..0e04f30481b 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-top-layer-combinations.tentative.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-top-layer-combinations.tentative.html
@@ -6,19 +6,18 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
 <script src="/resources/testdriver-vendor.js"></script>
 <script src="resources/popover-utils.js"></script>
 
+<button id=visible>Visible button</button>
 <div id=examples>
   <dialog popover>Popover Dialog</dialog>
   <dialog popover open style="top:50px;">Open Non-modal Popover Dialog</dialog>
-  <dialog popover=manual defaultopen style="top:100px;">Defaultopen Popover Dialog</dialog>
-  <dialog popover=manual defaultopen open style="top:150px;">Defaultopen and Open Popover Dialog</dialog>
   <div    popover class=fullscreen>Fullscreen Popover</div>
   <dialog popover class=fullscreen>Fullscreen Popover Dialog</dialog>
   <dialog popover open class=fullscreen style="top:200px;">Fullscreen Open Non-modal Popover Dialog</dialog>
 </div>
-<button id=visible>Visible button</button>
 
 <style>
   [popover] {
@@ -26,15 +25,19 @@
     top:0;
     left:0;
   }
+  [popover].fullscreen.visible {
+    display:block;
+  }
 </style>
 
 <script>
-showDefaultopenPopoversOnLoad();
 const isDialog = (ex) => ex instanceof HTMLDialogElement;
 const isFullscreen = (ex) => ex.classList.contains('fullscreen');
 function ensureIsOpenPopover(ex,message) {
   // Because :open will eventually support <dialog>, this does extra work to
-  // verify we're dealing with an :open Popover.
+  // verify we're dealing with an :open Popover. Note that this will also throw
+  // if this is an element with the `popover` attribute that has been made
+  // visible via an explicit `display:block` style rule.
   message = message || 'Error';
   assert_true(ex.matches(':open'),`${message}: Popover doesn\'t match :open`);
   assert_false(ex.matches(':closed'),`${message}: Popover matches :closed`);
@@ -47,23 +50,13 @@ window.onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
   examples.forEach(ex => {
     promise_test(async (t) => {
       t.add_cleanup(() => ex.remove());
+      // Test initial conditions
       if (ex.hasAttribute('open')) {
         assert_true(isDialog(ex));
         assert_true(isElementVisible(ex),'Open dialog should be visible by default');
-      } else if (ex.hasAttribute('defaultopen')) {
-        ensureIsOpenPopover(ex,'defaultopen should open the popover on load');
-        assert_true(isElementVisible(ex),'Popover with defaultopen should be visible by default');
-      }
-      if (isElementVisible(ex)) {
-        // ex is already open (defaultopen or open dialog)
         assert_throws_dom("InvalidStateError",() => ex.showPopover(),'Calling showPopover on an already-showing element should throw InvalidStateError');
-        if (ex.hasAttribute('open')) {
-          assert_true(isDialog(ex));
-          ex.removeAttribute('open');
-          assert_false(isElementVisible(ex),'Removing the open attribute should hide the dialog');
-        } else {
-          ex.hidePopover(); // Should not throw
-        }
+        ex.removeAttribute('open');
+        assert_false(isElementVisible(ex),'Removing the open attribute should hide the dialog');
       } else {
         ex.showPopover(); // Should not throw
         ensureIsOpenPopover(ex,'showPopover should work');
@@ -74,24 +67,24 @@ window.onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
 
       // Start with popover, try the other API
       ex.showPopover();
+      ensureIsOpenPopover(ex);
       let tested_something=false;
       if (isDialog(ex)) {
         tested_something=true;
-        ensureIsOpenPopover(ex);
         assert_throws_dom("InvalidStateError",() => ex.showModal(),'Calling showModal() on an already-showing Popover should throw InvalidStateError');
         assert_throws_dom("InvalidStateError",() => ex.show(),'Calling show() on an already-showing Popover should throw InvalidStateError');
       }
       if (isFullscreen(ex)) {
         tested_something=true;
         let requestSucceeded = false;
-        await blessTopLayer(ex)
-          .then(() => ex.requestFullscreen())
+        await blessTopLayer(ex);
+        await ex.requestFullscreen()
           .then(() => {requestSucceeded = true;}) // We should not hit this.
           .catch((exception) => {
             // This exception is expected.
             assert_equals(exception.name,'TypeError',`Invalid exception from requestFullscreen() (${exception.message})`);
           });
-          assert_false(requestSucceeded,'requestFullscreen() should not succeed when the element is an already-showing Popover');
+        assert_false(requestSucceeded,'requestFullscreen() should not succeed when the element is an already-showing Popover');
       }
       assert_true(tested_something);
       ensureIsOpenPopover(ex);
@@ -111,14 +104,46 @@ window.onload = () => requestAnimationFrame(() => requestAnimationFrame(() => {
         assert_false(ex.hasAttribute('open'));
       } else if (isFullscreen(ex)) {
         let requestSucceeded = false;
-        await blessTopLayer(visible)
-        .then(() => ex.requestFullscreen())
-        .then(() => {
-          assert_throws_dom("InvalidStateError",() => ex.showPopover(),'Calling showPopover() on an already-fullscreen element should throw InvalidStateError');
-        });
+        await blessTopLayer(visible);
+        await ex.requestFullscreen()
+          .then(() => {
+            assert_throws_dom("InvalidStateError",() => ex.showPopover(),'Calling showPopover() on an already-fullscreen element should throw InvalidStateError');
+          });
         await document.exitFullscreen()
         .then(() => assert_true(true));
       }
+
+      // Finally, try invoking these combined popovers via a declarative invoker
+      const button = document.createElement('button');
+      t.add_cleanup(() => button.remove());
+      document.body.appendChild(button);
+      assert_equals(ex.id,'');
+      ex.id = 'popover-id';
+      button.popoverToggleTarget = ex.id;
+      assert_true(ex.matches(':closed'));
+      await clickOn(button);
+      ensureIsOpenPopover(ex,'Invoking element should be able to invoke all popovers');
+      ex.hidePopover();
+      if (isDialog(ex)) {
+        ex.showModal();
+        assert_true(ex.hasAttribute('open'));
+      } else if (isFullscreen(ex)) {
+        // Popover fullscreen isn't visible by default, so explicitly add
+        // display:block, so that calls to "clickOn" can succeed.
+        ex.classList.add('visible');
+        await blessTopLayer(visible);
+        await ex.requestFullscreen();
+      } else {
+        assert_unreached('Not a dialog or fullscreen');
+      }
+      ex.appendChild(button); // Add button to the element, so it's visible to click
+      await clickOn(button);
+      assert_true(ex.matches(':closed'),'The invoker click should have failed on the already-open dialog/fullscreen');
+      if (isDialog(ex)) {
+        ex.close();
+      } else {
+        await document.exitFullscreen()
+      }
     }, `Popover combination: ${ex.textContent}`);
   });
 }));
diff --git a/tests/wpt/web-platform-tests/html/webappapis/animation-frames/callback-cross-realm-report-exception.html b/tests/wpt/web-platform-tests/html/webappapis/animation-frames/callback-cross-realm-report-exception.html
new file mode 100644
index 00000000000..1b8aa41a6d3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/animation-frames/callback-cross-realm-report-exception.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>requestAnimationFrame() reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    frames[0].requestAnimationFrame(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+    document.querySelector("iframe").height = 200;
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 100);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/webappapis/microtask-queuing/queue-microtask-cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/html/webappapis/microtask-queuing/queue-microtask-cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..fa153f8f965
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/microtask-queuing/queue-microtask-cross-realm-callback-report-exception.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>queueMicrotask() reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    frames[0].queueMicrotask(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 4);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/window-onerror-with-cross-frame-event-listeners-5.html b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/window-onerror-with-cross-frame-event-listeners-5.html
new file mode 100644
index 00000000000..da93e782ca9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/scripting/processing-model-2/window-onerror-with-cross-frame-event-listeners-5.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>window.onerror listener reports the exception in global object of its callback</title>
+<link rel=help href="https://dom.spec.whatwg.org/#concept-event-listener-inner-invoke">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+window.onload = () => {
+  test(() => {
+    window.onerrorCalls = [];
+    window.onerror = () => { onerrorCalls.push("top"); };
+    frames[0].onerror = new frames[1].Function(`top.onerrorCalls.push("frame0"); throw new parent.frames[2].Error("PASS");`);
+    frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+    frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+    frames[0].dispatchEvent(new ErrorEvent("error", { error: new Error("foo") }));
+    assert_array_equals(onerrorCalls, ["frame0", "frame1"]);
+  });
+};
+</script>
diff --git a/tests/wpt/web-platform-tests/html/webappapis/timers/setinterval-cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/html/webappapis/timers/setinterval-cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..4a780fc9329
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/timers/setinterval-cross-realm-callback-report-exception.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>window.setInterval() reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    const id = frames[0].setInterval(new frames[1].Function(`
+      parent.clearThisInterval();
+      throw new parent.frames[2].Error("PASS");
+    `), 4);
+    window.clearThisInterval = () => { frames[0].clearInterval(id); };
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 8);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/html/webappapis/timers/settimeout-cross-realm-callback-report-exception.html b/tests/wpt/web-platform-tests/html/webappapis/timers/settimeout-cross-realm-callback-report-exception.html
new file mode 100644
index 00000000000..b4860151a6c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/timers/settimeout-cross-realm-callback-report-exception.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>window.setTimeout() reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    frames[0].setTimeout(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`), 4);
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 8);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/intersection-observer/callback-cross-realm-report-exception.html b/tests/wpt/web-platform-tests/intersection-observer/callback-cross-realm-report-exception.html
new file mode 100644
index 00000000000..0bec720485d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/intersection-observer/callback-cross-realm-report-exception.html
@@ -0,0 +1,30 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IntersectionObserver reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe srcdoc='<div style="height: 100px;">foo</div>'></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    const target = frames[0].document.querySelector("div");
+    const io = new frames[0].IntersectionObserver(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+    io.observe(target);
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 25);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/loading/early-hints/preload-with-invalid-as.h2.window.js b/tests/wpt/web-platform-tests/loading/early-hints/preload-with-invalid-as.h2.window.js
new file mode 100644
index 00000000000..bebd97887cf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/loading/early-hints/preload-with-invalid-as.h2.window.js
@@ -0,0 +1,14 @@
+// META: script=/common/utils.js
+// META: script=resources/early-hints-helpers.sub.js
+
+test(() => {
+    const params = new URLSearchParams();
+    params.set("description",
+        "An early hints preload with an invalid `as` attribute should be ignored.");
+    params.set("resource-url",
+        SAME_ORIGIN_RESOURCES_URL + "/empty.js?" + token());
+    params.set("as", "invalid");
+    params.set("should-preload", false);
+    const test_url = "resources/preload-as-test.h2.py?" + params.toString();
+    window.location.replace(new URL(test_url, window.location));
+});
diff --git a/tests/wpt/web-platform-tests/loading/early-hints/preload-without-as.h2.window.js b/tests/wpt/web-platform-tests/loading/early-hints/preload-without-as.h2.window.js
index bf77210e5f6..9ac16210504 100644
--- a/tests/wpt/web-platform-tests/loading/early-hints/preload-without-as.h2.window.js
+++ b/tests/wpt/web-platform-tests/loading/early-hints/preload-without-as.h2.window.js
@@ -3,8 +3,11 @@
 
 test(() => {
     const params = new URLSearchParams();
+    params.set("description",
+        "An early hints preload without `as` attribute should be ignored.");
     params.set("resource-url",
         SAME_ORIGIN_RESOURCES_URL + "/empty.js?" + token());
-    const test_url = "resources/preload-without-as.h2.py?" + params.toString();
+    params.set("should-preload", false);
+    const test_url = "resources/preload-as-test.h2.py?" + params.toString();
     window.location.replace(new URL(test_url, window.location));
 });
diff --git a/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.h2.py b/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.h2.py
similarity index 68%
rename from tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.h2.py
rename to tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.h2.py
index d37a0a690a8..682edb56dff 100644
--- a/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.h2.py
+++ b/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.h2.py
@@ -3,7 +3,12 @@ import os
 
 def handle_headers(frame, request, response):
     resource_url = request.GET.first(b"resource-url").decode()
-    link_header_value = "<{}>; rel=preload".format(resource_url)
+    as_value = request.GET.first(b"as", None)
+    if as_value:
+        link_header_value = "<{}>; rel=preload; as={}".format(
+            resource_url, as_value.decode())
+    else:
+        link_header_value = "<{}>; rel=preload".format(resource_url)
     early_hints = [
         (b":status", b"103"),
         (b"link", link_header_value),
@@ -18,7 +23,7 @@ def handle_headers(frame, request, response):
 
 def main(request, response):
     current_dir = os.path.dirname(os.path.realpath(__file__))
-    file_path = os.path.join(current_dir, "preload-without-as.html")
+    file_path = os.path.join(current_dir, "preload-as-test.html")
     with open(file_path, "r") as f:
         test_content = f.read()
     response.writer.write_data(item=test_content, last=True)
diff --git a/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.html b/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.html
similarity index 56%
rename from tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.html
rename to tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.html
index f0473bd5053..daea33160ae 100644
--- a/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-without-as.html
+++ b/tests/wpt/web-platform-tests/loading/early-hints/resources/preload-as-test.html
@@ -5,11 +5,14 @@
 <script src="early-hints-helpers.sub.js"></script>
 <body>
 <script>
+const params = new URLSearchParams(window.location.search);
+const description = params.get("description");
+
 promise_test(async (t) => {
-    const params = new URLSearchParams(window.location.search);
     const resource_url = params.get("resource-url");
+    const should_preload = params.get("should-preload") === "true";
     await fetchScript(resource_url);
-    assert_false(isPreloadedByEarlyHints(resource_url));
-}, "An early hints preload without `as` attribute should be ignored.");
+    assert_equals(isPreloadedByEarlyHints(resource_url), should_preload);
+}, description);
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-baseline.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
index cc007cf81ff..0086646859a 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
@@ -20,13 +20,13 @@
   window.addEventListener("load", runTests);
   function runTests()
   {
-      ["Mrow", "Sqrt", "Style", "Error", "Phantom", "Math", "Menclose", "Mpadded", "Unknown", "Mtd"].forEach((tag) => {
-          var x = document.getElementById("above" + tag).getBoundingClientRect();
-          var y = document.getElementById("below" + tag).getBoundingClientRect();
+      ["Mrow", "Sqrt", "Style", "Error", "Phantom", "Math", "Menclose", "Mpadded", "Unknown", "Mtd", "None", "Mprescripts"].forEach((tag) => {
+          var x = document.getElementById(`above${tag}`).getBoundingClientRect();
+          var y = document.getElementById(`below${tag}`).getBoundingClientRect();
           test(function() {
               assert_true(MathMLFeatureDetection.has_mspace());
               assert_equals(x.bottom, y.top);
-          }, "baseline alignment inside " + tag);
+          }, `baseline alignment inside ${tag}`);
       });
       done();
   }
@@ -50,6 +50,8 @@
 ></mspace><mspace id="belowUnknown" width="10px" depth="30px" style="background: blue"></mspace></unknown></math>
     <math><mtable><mtr><mtd><mspace id="aboveMtd" width="10px" height="30px" style="background: purple"
 ></mspace><mspace id="belowMtd" width="10px" depth="30px" style="background: blue"></mspace></mtd></mtr></mtable></math>
+    <math><none><mspace id="aboveNone" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowNone" width="10px" depth="30px" style="background: blue"></mspace></none></math>
+    <math><mprescripts><mspace id="aboveMprescripts" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowMprescripts" width="10px" depth="30px" style="background: blue"></mspace></none></math>
   </p>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
index a1e409a248e..614438deb30 100644
--- a/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
@@ -32,12 +32,12 @@
   window.addEventListener("load", () => { loadAllFonts().then(runTests); });
   function runTests()
   {
-      ["Mrow", "Sqrt", "Style", "Error", "Phantom", "Math", "Menclose", "Mpadded", "Unknown", "Mtd"].forEach((tag) => {
-          var mo = document.getElementById("mo" + tag);
+      ["Mrow", "Sqrt", "Style", "Error", "Phantom", "Math", "Menclose", "Mpadded", "Unknown", "Mtd", "None", "Mprescripts"].forEach((tag) => {
+          var mo = document.getElementById(`mo${tag}`);
           test(function() {
               assert_true(MathMLFeatureDetection.has_mspace());
               assert_greater_than_equal(mo.getBoundingClientRect().height, 100);
-          }, "operator stretching inside " + tag);
+          }, `operator stretching inside ${tag}`);
       });
       done();
   }
@@ -57,6 +57,8 @@
     <math><mpadded lspace="10px"><mo id="moMpadded">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mpadded></math>
     <math><unknown><mo id="moUnknown">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></unknown></math>
     <math><mtable><mtr><mtd><mo id="moMtd">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mtd></mtr></mtable></math>
+    <math><none><mo id="moNone">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></none></math>
+    <math><mprescripts><mo id="moMprescripts">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mprescripts></math>
   </p>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001-ref.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001-ref.html
new file mode 100644
index 00000000000..f8631539c02
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001-ref.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>mprescripts should render as an mrow (reference)</title>
+  </head>
+  <body>
+    <math>
+      <mrow>
+        <mspace width="10px" height="20px" style="background: cyan;"></mspace>
+        <mspace width="30px" height="10px" depth="5px" style="background: blue;"></mspace>
+        <mspace width="20px" height="15px" depth="30px" style="background: lightblue;"></mspace>
+        <mspace width="25px" depth="20px" style="background: cyan;"></mspace>
+        <mspace width="40px" height="5px" depth="15px" style="background: blue;"></mspace>
+        <mspace width="20px" height="35px" depth="5px" style="background: lightblue;"></mspace>
+      </mrow>
+    </math>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001.html
new file mode 100644
index 00000000000..2435b6291d5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/mprescripts-001.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>mprescripts should render as an mrow</title>
+    <link rel="help" href="https://w3c.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup">
+    <meta name="assert" content="Verify that mprescripts uses mrow layout">
+    <link rel="match" href="mprescripts-001-ref.html">
+  </head>
+  <body>
+    <math>
+      <mprescripts>
+        <mspace width="10px" height="20px" style="background: cyan;"></mspace>
+        <mspace width="30px" height="10px" depth="5px" style="background: blue;"></mspace>
+        <mspace width="20px" height="15px" depth="30px" style="background: lightblue;"></mspace>
+        <mspace width="25px" depth="20px" style="background: cyan;"></mspace>
+        <mspace width="40px" height="5px" depth="15px" style="background: blue;"></mspace>
+        <mspace width="20px" height="35px" depth="5px" style="background: lightblue;"></mspace>
+      </mprescripts>
+    </math>
+    <script src="/mathml/support/feature-detection.js"></script>
+    <script>
+      MathMLFeatureDetection.ensure_for_match_reftest("has_mspace");
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001-ref.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001-ref.html
new file mode 100644
index 00000000000..55add014151
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001-ref.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>none should render as an mrow (reference)</title>
+  </head>
+  <body>
+    <math>
+      <mrow>
+        <mspace width="10px" height="20px" style="background: cyan;"></mspace>
+        <mspace width="30px" height="10px" depth="5px" style="background: blue;"></mspace>
+        <mspace width="20px" height="15px" depth="30px" style="background: lightblue;"></mspace>
+        <mspace width="25px" depth="20px" style="background: cyan;"></mspace>
+        <mspace width="40px" height="5px" depth="15px" style="background: blue;"></mspace>
+        <mspace width="20px" height="35px" depth="5px" style="background: lightblue;"></mspace>
+      </mrow>
+    </math>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001.html
new file mode 100644
index 00000000000..f1bfb442f79
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-001.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>none should render as an mrow</title>
+    <link rel="help" href="https://w3c.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup">
+    <meta name="assert" content="Verify that none uses mrow layout">
+    <link rel="match" href="none-001-ref.html">
+  </head>
+  <body>
+    <math>
+      <none>
+        <mspace width="10px" height="20px" style="background: cyan;"></mspace>
+        <mspace width="30px" height="10px" depth="5px" style="background: blue;"></mspace>
+        <mspace width="20px" height="15px" depth="30px" style="background: lightblue;"></mspace>
+        <mspace width="25px" depth="20px" style="background: cyan;"></mspace>
+        <mspace width="40px" height="5px" depth="15px" style="background: blue;"></mspace>
+        <mspace width="20px" height="35px" depth="5px" style="background: lightblue;"></mspace>
+      </none>
+    </math>
+    <script src="/mathml/support/feature-detection.js"></script>
+    <script>
+      MathMLFeatureDetection.ensure_for_match_reftest("has_mspace");
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002-ref.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002-ref.html
new file mode 100644
index 00000000000..dac4dab553d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002-ref.html
@@ -0,0 +1,73 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>none used at other places than mmultiscripts' script (reference)</title>
+    <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+    <style>
+      math { font: 25px/1 Ahem; }
+    </style>
+  </head>
+  <body>
+    <p>
+      <math>
+        <msub>
+          <mrow></mrow>
+          <mn>2</mn>
+        </msub>
+      </math>
+      <math>
+        <msub>
+          <mn>1</mn>
+          <mrow></mrow>
+        </msub>
+      </math>
+    </p>
+    <p>
+      <math>
+        <msup>
+          <mrow></mrow>
+          <mn>2</mn>
+        </msup>
+      </math>
+      <math>
+        <msup>
+          <mn>1</mn>
+          <mrow></mrow>
+        </msup>
+      </math>
+    </p>
+    <p>
+      <math>
+        <msubsup>
+          <mrow></mrow>
+          <mn>2</mn>
+          <mn>3</mn>
+        </msubsup>
+      </math>
+      <math>
+        <msubsup>
+          <mn>1</mn>
+          <mrow></mrow>
+          <mn>3</mn>
+        </msubsup>
+      </math>
+      <math>
+        <msubsup>
+          <mn>1</mn>
+          <mn>2</mn>
+          <mrow></mrow>
+        </msubsup>
+      </math>
+    </p>
+    <p>
+      <math>
+        <mmultiscripts>
+          <mrow></mrow>
+          <mn>2</mn>
+          <mn>3</mn>
+        </mmultiscripts>
+      </math>
+    </p>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002.html b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002.html
new file mode 100644
index 00000000000..d1f3a3a0e12
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/presentation-markup/scripts/none-002.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>none used at other places than mmultiscripts' script</title>
+    <link rel="help" href="https://w3c.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup">
+    <meta name="assert" content="none can be used at other places than mmultiscripts' script, without triggering 'invalid markup'">
+    <link rel="match" href="none-002-ref.html">
+    <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+    <style>
+      math { font: 25px/1 Ahem; }
+    </style>
+  </head>
+  <body>
+    <p>
+      <math>
+        <msub>
+          <none/>
+          <mn>2</mn>
+        </msub>
+      </math>
+      <math>
+        <msub>
+          <mn>1</mn>
+          <none/>
+        </msub>
+      </math>
+    </p>
+    <p>
+      <math>
+        <msup>
+          <none/>
+          <mn>2</mn>
+        </msup>
+      </math>
+      <math>
+        <msup>
+          <mn>1</mn>
+          <none/>
+        </msup>
+      </math>
+    </p>
+    <p>
+      <math>
+        <msubsup>
+          <none/>
+          <mn>2</mn>
+          <mn>3</mn>
+        </msubsup>
+      </math>
+      <math>
+        <msubsup>
+          <mn>1</mn>
+          <none/>
+          <mn>3</mn>
+        </msubsup>
+      </math>
+      <math>
+        <msubsup>
+          <mn>1</mn>
+          <mn>2</mn>
+          <none/>
+        </msubsup>
+      </math>
+    </p>
+    <p>
+      <math>
+        <mmultiscripts>
+          <none/>
+          <mn>2</mn>
+          <mn>3</mn>
+        </mmultiscripts>
+      </math>
+    </p>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001-ref.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001-ref.html
new file mode 100644
index 00000000000..447c5b722a5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001-ref.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8"/>
+<title>Absolutely positioned (reference)</title>
+<body>
+  <p>Test passes if you see a green square and no red.</p>
+  <div style="position: absolute; left: 100px; top: 100px;">
+    <math>
+      <mrow>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+      </mrow>
+    </math>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001.html
new file mode 100644
index 00000000000..9a7851ba239
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/absolutely-positioned-001.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8"/>
+<title>Absolutely positioned</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
+<link rel="help" href="https://w3c.github.io/mathml-core/#layout-of-mrow">
+<link rel="match" href="absolutely-positioned-001-ref.html"/>
+<meta name="assert" content="Verify visual rendering of absolutely positioned mtext elements.">
+<body>
+  <p>Test passes if you see a green square and no red.</p>
+  <div style="position: absolute; left: 100px; top: 100px;">
+    <math>
+      <mrow>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: red"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mtext style="position: absolute; left: 100px; top: 0px;"><span style="display: inline-block; width: 50px; height: 300px; background: green"></span></mtext>
+        <mtext style="position: absolute; left: 150px; top: 0px;"><span style="display: inline-block; width: 50px; height: 150px; background: green"></span></mtext>
+        <mtext style="position: absolute; left: 150px; top: 150px;"><span style="display: inline-block; width: 50px; height: 150px; background: green"></span></mtext>
+      </mrow>
+    </math>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/all-mathml-containers.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/all-mathml-containers.html
new file mode 100644
index 00000000000..9069b926373
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/all-mathml-containers.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>absolutely positioned in all MathML elements</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
+<meta name="assert" content="Verify that absolutely positioned node works in all MathML elements.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/feature-detection.js"></script>
+<script src="/mathml/support/mathml-fragments.js"></script>
+<style>
+  /* override display: none on children of maction/semantics */
+  maction > *, semantics > * {
+    display: math;
+  }
+</style>
+<script>
+
+  setup({ explicit_done: true });
+  window.addEventListener("load", runTests);
+
+  function runTests() {
+      ["absolute", "fixed"].forEach(positionValue => {
+          for (tag in MathMLFragments) {
+              if (!FragmentHelper.isValidChildOfMrow(tag) ||
+                  FragmentHelper.isEmpty(tag))
+                  continue;
+              document.body.insertAdjacentHTML("beforeend", `<div style="position: absolute;">\
+<math>${MathMLFragments[tag]}</math>\
+</div>`);
+              let div = document.body.lastElementChild;
+              let element = FragmentHelper.element(div.firstElementChild);
+              FragmentHelper.forceNonEmptyElement(element);
+              if (element.classList.contains("mathml-container") ||
+                  element.classList.contains("foreign-container")) {
+                  for (let i = 0; i < 5; i++) {
+                      FragmentHelper.appendChild(element);
+                  }
+              }
+
+              let middleChild;
+              if (element.children.length >= 2) {
+                  middleChild = FragmentHelper.appendChild(element, true /*allowInvalid*/);
+                  middleChild.setAttribute("style", `position: ${positionValue}; left: 300px; top: 400px`);
+                  let middlePosition = Math.floor(element.children.length/2);
+                  element.insertBefore(middleChild, element.children[middlePosition]);
+              }
+
+              let firstChild = FragmentHelper.appendChild(element, true /*allowInvalid*/);
+              firstChild.setAttribute("style", `position: ${positionValue}; left: 100px; top: 200px`);
+              element.insertBefore(firstChild, element.firstElementChild);
+
+              let lastChild = FragmentHelper.appendChild(element, true /*allowInvalid*/);
+              lastChild.setAttribute("style", `position: ${positionValue}; left: 500px; top: 600px`);
+
+              let referenceBox;
+              switch (positionValue) {
+              case "absolute":
+                  // Use the absolutely positioned div ancestor.
+                  referenceBox = div.getBoundingClientRect();
+                  break
+              case "fixed":
+                  // Use the viewport.
+                  referenceBox = {left: 0, top: 0};
+                  break;
+              default:
+                  throw "reference box not defined";
+              }
+
+              let firstChildBox = firstChild.getBoundingClientRect();
+              let lastChildBox = lastChild.getBoundingClientRect();
+              let middleChildBox;
+              if (middleChild) {
+                  middleChildBox = middleChild.getBoundingClientRect();
+              }
+
+              let epsilon = 1;
+
+              test(function() {
+                  assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);
+                  assert_approx_equals(firstChildBox.left - referenceBox.left, 100, epsilon);
+                  assert_approx_equals(firstChildBox.top - referenceBox.top, 200, epsilon);
+                  if (middleChildBox) {
+                      assert_approx_equals(middleChildBox.left - referenceBox.left, 300, epsilon);
+                      assert_approx_equals(middleChildBox.top - referenceBox.top, 400, epsilon);
+                  }
+                  assert_approx_equals(lastChildBox.left - referenceBox.left, 500, epsilon);
+                  assert_approx_equals(lastChildBox.top - referenceBox.top, 600, epsilon);
+              }, `position: ${positionValue}; children in ${tag}`);
+
+              div.style = "display: none;"; // Hide the div after measurement.
+          }
+      });
+
+      done();
+  }
+</script>
+</head>
+<body>
+  <div id="log"></div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001-ref.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001-ref.html
new file mode 100644
index 00000000000..03b9f566984
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001-ref.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<meta charset="utf-8"/>
+<title>Fixed positioned (reference)</title>
+<style>
+  body { overflow: hidden; }
+</style>
+<body>
+  <div style="position: absolute; left: 100px; top: 200px;
+              height: 3000px; width: 3000px;">
+    <math>
+      <mrow>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+      </mrow>
+    </math>
+    <p>Test passes if you see a green square and no red.</p>
+  </div>
+  <script>
+    requestAnimationFrame(() => {
+      window.scrollTo(50, 100);
+      document.documentElement.classList.remove("reftest-wait");
+    });
+  </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001.html
new file mode 100644
index 00000000000..994174162c5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/out-of-flow/fixed-positioned-001.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<meta charset="utf-8"/>
+<title>Fixed positioned</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
+<link rel="help" href="https://w3c.github.io/mathml-core/#layout-of-mrow">
+<link rel="match" href="fixed-positioned-001-ref.html"/>
+<meta name="assert" content="Verify visual rendering of fixed positioned mtext elements.">
+<style>
+  body { overflow: hidden; }
+</style>
+<body>
+  <div style="position: absolute; left: 100px; top: 200px;
+              height: 3000px; width: 3000px;">
+    <math>
+      <mrow>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mspace width="100px" height="300px" style="background: red"/>
+        <mspace width="100px" height="300px" style="background: green"/>
+        <mtext style="position: fixed; left: 150px; top: 100px;"><span style="display: inline-block; width: 50px; height: 300px; background: green"></span></mtext>
+        <mtext style="position: fixed; left: 200px; top: 100px;"><span style="display: inline-block; width: 50px; height: 150px; background: green"></span></mtext>
+        <mtext style="position: fixed; left: 200px; top: 250px;"><span style="display: inline-block; width: 50px; height: 150px; background: green"></span></mtext>
+      </mrow>
+    </math>
+    <p>Test passes if you see a green square and no red.</p>
+  </div>
+  <script>
+    requestAnimationFrame(() => {
+      window.scrollTo(50, 100);
+      document.documentElement.classList.remove("reftest-wait");
+    });
+  </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/overflow/computed-value-001.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/overflow/computed-value-001.html
new file mode 100644
index 00000000000..0510f1da6d3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/overflow/computed-value-001.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>overflow on MathML elements</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#user-agent-stylesheet">
+<meta name="assert" content="overflow can be overridden on MathML elements.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/mathml/support/mathml-fragments.js"></script>
+<style>
+  /* selector defined in mathml-fragments.js */
+  .element {
+    overflow: scroll;
+  }
+</style>
+</head>
+<body>
+  <div id="log"></div>
+  <div id="container">
+    <math class="element"></math>
+  </div>
+  <script>
+    test(function () {
+      var container = document.getElementById("container");
+      for (tag in MathMLFragments) {
+          // Skip mtable as browsers don't have interoperable behavior for
+          // display: table.
+          // See https://github.com/w3c/csswg-drafts/issues/8133
+          if (tag == "mtable")
+              continue;
+          container.insertAdjacentHTML("beforeend", `<math>${MathMLFragments[tag]}</math>`);
+      }
+      let unknownElement = FragmentHelper.createElement("unknown");
+      unknownElement.setAttribute("class", "element");
+      container.appendChild(unknownElement);
+      Array.from(document.getElementsByClassName("element")).forEach(element => {
+        var tag = element.tagName;
+        var style = window.getComputedStyle(element);
+        assert_equals(style["overflow"], "scroll", `overflow on ${tag}`);
+      }, `overflow can be overridden on all MathML elements`);
+    });
+  </script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_hoverable_pointers.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_hoverable_pointers.html
index 6051991375e..a6158d59d6e 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_hoverable_pointers.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_hoverable_pointers.html
@@ -14,7 +14,7 @@
         <!-- Additional helper script for common checks across event types -->
         <script type="text/javascript" src="pointerevent_support.js"></script>
         <script>
-            var input = location.search.substring(1);
+            var input_pointertype = location.search.substring(1);
             var detected_pointertypes = {};
             var detected_eventTypes = {};
             var eventList = ['pointerover', 'pointerenter', 'pointermove', 'pointerdown', 'pointerup', 'pointerout', 'pointerleave'];
@@ -79,7 +79,7 @@
 
                 check_PointerEvent(event, testNamePrefix);
 
-                // Test isPrimary value
+                // Test isPrimary
                 test(function () {
                     assert_equals(event.isPrimary, true, "isPrimary should be true");
                 }, pointerTestName + ".isPrimary attribute is correct.");
@@ -95,7 +95,7 @@
             }
 
             function run() {
-                var test_pointerEvent = setup_pointerevent_test("pointerevent attributes", [input]);
+                var test_pointerEvent = setup_pointerevent_test("pointerevent attributes", [input_pointertype]);
                 var square1 = document.getElementById("square1");
                 var rectSquare1 = square1.getBoundingClientRect();
                 var innerFrame = document.getElementById('innerFrame');
@@ -128,12 +128,12 @@
                 });
 
                 // Inject mouse or pen inputs.
-                actions_promise = clickInTarget(input, square1).then(function() {
-                    return moveToDocument(input);
+                actions_promise = clickInTarget(input_pointertype, square1).then(function() {
+                    return moveToDocument(input_pointertype);
                 }).then(function() {
-                    return clickInTarget(input, square2);
+                    return clickInTarget(input_pointertype, square2);
                 }).then(function() {
-                    return moveToDocument(input);
+                    return moveToDocument(input_pointertype);
                 }).then(function() {
                     test_pointerEvent.done();
                 });
@@ -164,4 +164,3 @@
         <div id="log"></div>
     </body>
 </html>
-
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_nohover_pointers.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_nohover_pointers.html
index 477aa1f6751..ec1aee83da7 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_nohover_pointers.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_attributes_nohover_pointers.html
@@ -15,6 +15,7 @@
             var detected_pointertypes = {};
             var detected_eventTypes = {};
             var eventList = ['pointerover', 'pointerenter', 'pointerdown', 'pointerup', 'pointerout', 'pointerleave'];
+            // TODO(mustaq@chromium.org): missing touch pointermove coverage!
             var expectedPointerId = NaN;
 
             function resetTestState() {
@@ -38,16 +39,16 @@
                 // Test button and buttons
                 test(function() {
                     assert_equals(event.button, 0, "Button attribute is 0")
-                }, pointerTestName + "'s button attribute is 0 when left mouse button is pressed.");
+                }, pointerTestName + "'s button attribute is 0 on touch-down.");
 
                 if (event.type == 'pointerdown' || event.type == 'pointerover' || event.type == 'pointerenter') {
                     test(function() {
                         assert_equals(event.buttons, 1, "Buttons attribute is 1")
-                    }, pointerTestName + "'s buttons attribute is 1 when left mouse button is pressed.");
+                    }, pointerTestName + "'s buttons attribute is 1 on touch-down.");
                 } else {
                     test(function() {
                         assert_equals(event.buttons, 0, "Buttons attribute is 0")
-                    }, pointerTestName + "'s buttons is 0 when mouse buttons are in released state.");
+                    }, pointerTestName + "'s buttons is 0 on touch-release.");
                 }
 
                 // Test clientX and clientY
@@ -73,7 +74,7 @@
             }
 
             function run() {
-                var test_pointerEvent = setup_pointerevent_test("pointerevent attributes", NOHOVER_POINTERS);
+                var test_pointerEvent = setup_pointerevent_test("pointerevent attributes", ['touch']);
                 var square1 = document.getElementById("square1");
                 var rectSquare1 = square1.getBoundingClientRect();
                 var innerFrame = document.getElementById('innerFrame');
@@ -135,4 +136,3 @@
         <div id="log"></div>
     </body>
 </html>
-
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerenter_does_not_bubble.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerenter_does_not_bubble.html
index a8153c256fc..5193e7ab0bb 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerenter_does_not_bubble.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerenter_does_not_bubble.html
@@ -32,7 +32,6 @@
                 on_event(target0, "pointerenter", function (event) {
                     pointerenter_event = event;
 
-                    check_PointerEvent(event);
                     test_pointerEvent.step(function () {
                         assert_equals(event.type, "pointerenter", "pointer event received: " + event.type);
                         assert_false(event.bubbles, "pointerenter event.bubbles should be false: " + event.bubbles);
@@ -100,4 +99,4 @@
         </div>
         <div id="log"></div>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerleave_does_not_bubble.html b/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerleave_does_not_bubble.html
index 0dc88ee318f..50af44cfbaf 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerleave_does_not_bubble.html
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_pointerleave_does_not_bubble.html
@@ -29,7 +29,7 @@
 
                 on_event(target0, "pointerleave", function (event) {
                     detected_pointertypes[event.pointerType] = true;
-                    check_PointerEvent(event);
+
                     test_pointerEvent.step(function () {
                         assert_equals(event.type, "pointerleave", "pointer event received: " + event.type);
                         assert_false(event.bubbles, "pointerleave event.bubbles should be false: " + event.bubbles);
@@ -87,4 +87,4 @@
         </div>
         <div id="log"></div>
     </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
index 696ea46748b..c50610a700c 100644
--- a/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
+++ b/tests/wpt/web-platform-tests/pointerevents/pointerevent_support.js
@@ -84,7 +84,8 @@ function check_PointerEvent(event, testNamePrefix) {
         ["readonly", "boolean", "isPrimary"],
         ["readonly", "long", "detail", 0],
         ["readonly", "object", "fromElement", null],
-        ["readonly", "object", "toElement", null]
+        ["readonly", "object", "toElement", null],
+        ["readonly", "boolean", "isTrusted", true]
     ].forEach(function (attr) {
         var readonly = attr[0];
         var type = attr[1];
@@ -116,6 +117,12 @@ function check_PointerEvent(event, testNamePrefix) {
         }
     });
 
+    // Check the composed value
+    // https://w3c.github.io/pointerevents/#attributes-and-default-actions
+    test(function () {
+        let expected = (event.type != 'pointerenter' && event.type != 'pointerleave');
+        assert_equals(event.composed, expected, "composed attribute value");
+    }, pointerTestName + ".composed value is valid");
 
     // Check the pressure value
     // TA: 1.6, 1.7, 1.8
@@ -236,8 +243,6 @@ function rPointerCapture(e) {
 var globalPointerEventTest = null;
 var expectedPointerType = null;
 const ALL_POINTERS = ['mouse', 'touch', 'pen'];
-const HOVERABLE_POINTERS = ['mouse', 'pen'];
-const NOHOVER_POINTERS = ['touch'];
 
 function MultiPointerTypeTest(testName, types) {
     this.testName = testName;
diff --git a/tests/wpt/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html b/tests/wpt/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html
new file mode 100644
index 00000000000..75a91ec0a17
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html
@@ -0,0 +1,30 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>ResizeObserver reports the exception from its callback in the callback's global object</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<iframe srcdoc='<div style="height: 100px;">foo</div>'></iframe>
+<iframe></iframe>
+<iframe></iframe>
+<script>
+setup({ allow_uncaught_exception: true });
+
+const onerrorCalls = [];
+window.onerror = () => { onerrorCalls.push("top"); };
+frames[0].onerror = () => { onerrorCalls.push("frame0"); };
+frames[1].onerror = () => { onerrorCalls.push("frame1"); };
+frames[2].onerror = () => { onerrorCalls.push("frame2"); };
+
+async_test(t => {
+  window.onload = t.step_func(() => {
+    const target = frames[0].document.querySelector("div");
+    const io = new frames[0].ResizeObserver(new frames[1].Function(`throw new parent.frames[2].Error("PASS");`));
+    io.observe(target);
+
+    t.step_timeout(() => {
+      assert_array_equals(onerrorCalls, ["frame1"]);
+      t.done();
+    }, 25);
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-computed.html b/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-computed.html
index 68ba1f22aac..29486a02c19 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-computed.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/animation-timeline-computed.html
@@ -22,16 +22,17 @@ test_computed_value('animation-timeline', 'auto, auto');
 test_computed_value('animation-timeline', 'none, none');
 test_computed_value('animation-timeline', 'auto, none');
 test_computed_value('animation-timeline', 'none, auto');
-test_computed_value('animation-timeline', '"test"', ["test", '"test"']);
+test_computed_value('animation-timeline', '"test"', 'test');
 test_computed_value('animation-timeline', '"none"');
 test_computed_value('animation-timeline', '"auto"');
 test_computed_value('animation-timeline', '"initial"');
 test_computed_value('animation-timeline', '"inherit"');
 test_computed_value('animation-timeline', '"unset"');
 test_computed_value('animation-timeline', '"revert"');
+test_computed_value('animation-timeline', '"revert-layer"');
 test_computed_value('animation-timeline', 'test');
 test_computed_value('animation-timeline', 'test1, test2');
-test_computed_value('animation-timeline', 'test1, "test2", none, test3, auto', ["test1, test2, none, test3, auto", 'test1, "test2", none, test3, auto']);
+test_computed_value('animation-timeline', 'test1, "test2", none, test3, auto', 'test1, test2, none, test3, auto');
 
 test(() => {
   let style = getComputedStyle(document.getElementById('target'));
diff --git a/tests/wpt/web-platform-tests/scroll-animations/view-timelines/view-timeline-inset.html b/tests/wpt/web-platform-tests/scroll-animations/view-timelines/view-timeline-inset.html
index 4864d63b386..0dcce6d48dc 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/view-timelines/view-timeline-inset.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/view-timelines/view-timeline-inset.html
@@ -157,4 +157,14 @@ promise_test(async t => {
     rangeEnd: 900 - 0.1 * vmin
   });
 }, 'view timeline with viewport relative insets.');
+
+
+promise_test(async t => {
+  assert_throws_dom('NOT_SUPPORTED_ERR', () => {
+    new ViewTimeline({
+      subject: target,
+      inset: [ CSS.rad(1) ]
+    });
+  });
+}, 'view timeline with invalid inset');
 </script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/document-rules.https.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/document-rules.https.html
new file mode 100644
index 00000000000..a5030f6938b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/document-rules.https.html
@@ -0,0 +1,136 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="resources/utils.sub.js"></script>
+<script src="/common/subset-tests-by-key.js"></script>
+
+<meta name="variant" content="?include=defaultPredicate">
+<meta name="variant" content="?include=hrefMatches">
+<meta name="variant" content="?include=and">
+<meta name="variant" content="?include=or">
+<meta name="variant" content="?include=not">
+<meta name="variant" content="?include=invalidPredicate">
+<meta name="variant" content="?include=linkInShadowTree">
+
+<body>
+<script>
+  subsetTestByKey('defaultPredicate', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    const url = getPrefetchUrl();
+    addLink(url);
+    insertDocumentRule();
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url), 1);
+  }, 'test document rule with no predicate');
+
+  subsetTestByKey('hrefMatches', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    insertDocumentRule({ href_matches: '*\\?uuid=*&foo=bar' });
+
+    const url_1 = getPrefetchUrl({foo: 'bar'});
+    addLink(url_1);
+    const url_2 = getPrefetchUrl({foo: 'buzz'});
+    addLink(url_2)
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url_1), 1);
+    assert_equals(await isUrlPrefetched(url_2), 0);
+  }, 'test href_matches document rule');
+
+  subsetTestByKey('and', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    insertDocumentRule({
+      'and': [
+        { href_matches: '*\\?*foo=bar*' },
+        { href_matches: '*\\?*fizz=buzz*' }]
+    });
+
+    const url_1 = getPrefetchUrl({foo: 'bar'});
+    const url_2 = getPrefetchUrl({fizz: 'buzz'});
+    const url_3 = getPrefetchUrl({foo: 'bar', fizz: 'buzz'});
+    [url_1, url_2, url_3].forEach(url => addLink(url));
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url_1), 0);
+    assert_equals(await isUrlPrefetched(url_2), 0);
+    assert_equals(await isUrlPrefetched(url_3), 1);
+  }, 'test document rule with conjunction predicate');
+
+  subsetTestByKey('or', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    insertDocumentRule({
+      'or': [
+        { href_matches: '*\\?*foo=bar*' },
+        { href_matches: '*\\?*fizz=buzz*' }]
+    });
+
+    const url_1 = getPrefetchUrl({ foo: 'buzz' });
+    const url_2 = getPrefetchUrl({ fizz: 'buzz' });
+    const url_3 = getPrefetchUrl({ foo: 'bar'});
+    [url_1, url_2, url_3].forEach(url => addLink(url));
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url_1), 0);
+    assert_equals(await isUrlPrefetched(url_2), 1);
+    assert_equals(await isUrlPrefetched(url_3), 1);
+  }, 'test document rule with disjunction predicate');
+
+  subsetTestByKey('not', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      "Speculation Rules not supported");
+
+    insertDocumentRule({ not: { href_matches: '*\\?uuid=*&foo=bar' } });
+
+    const url_1 = getPrefetchUrl({foo: 'bar'});
+    addLink(url_1);
+    const url_2 = getPrefetchUrl({foo: 'buzz'});
+    addLink(url_2)
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url_1), 0);
+    assert_equals(await isUrlPrefetched(url_2), 1);
+  }, 'test document rule with negation predicate');
+
+  subsetTestByKey('invalidPredicate', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    const url = getPrefetchUrl();
+    addLink(url);
+    insertDocumentRule({invalid: 'predicate'});
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url), 0);
+  }, 'invalid predicate should not throw error or start prefetch');
+
+  subsetTestByKey('linkInShadowTree', promise_test, async t => {
+    assert_implements(HTMLScriptElement.supports('speculationrules'),
+      'Speculation Rules not supported');
+
+    insertDocumentRule();
+
+    // Create shadow root.
+    const shadowHost = document.createElement('div');
+    document.body.appendChild(shadowHost);
+    const shadowRoot = shadowHost.attachShadow({mode: 'open'});
+
+    const url = getPrefetchUrl();
+    addLink(url, shadowRoot);
+    await new Promise(resolve => t.step_timeout(resolve, 2000));
+
+    assert_equals(await isUrlPrefetched(url), 1);
+  }, 'test that matching link in a shadow tree is prefetched');
+
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/prefetch-traverse-reload.sub.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/prefetch-traverse-reload.sub.html
new file mode 100644
index 00000000000..86e03ed7b79
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/prefetch-traverse-reload.sub.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/websockets/constants.sub.js"></script>
+<script src="resources/utils.sub.js"></script>
+<script>
+promise_test(async t => {
+  assert_implements(HTMLScriptElement.supports('speculationrules'), "Speculation Rules not supported");
+
+  let agent = await spawnWindow(t, { protocol: 'https', pipe: 'header(Cache-Control, no-store)' });
+  let previousUrl = await agent.execute_script(() => location.href);
+  await agent.execute_script(async () => {
+    window.preventBfcache = new WebSocket('wss://{{ports[wss][0]}}/echo');
+  });
+
+  let nextUrl = agent.getExecutorURL({ protocol: 'https', page: 2 });
+  await agent.navigate(nextUrl);
+
+  await agent.forceSinglePrefetch(previousUrl);
+  await agent.execute_script(() => {
+    window.executor.suspend(() => history.go(-1));
+  });
+
+  assert_equals(previousUrl, await agent.execute_script(() => location.href));
+  assert_prefetched(await agent.getRequestHeaders(), "traversal should use prefetch");
+}, "prefetches can be used for traversal navigations");
+
+promise_test(async t => {
+  assert_implements(HTMLScriptElement.supports('speculationrules'), "Speculation Rules not supported");
+
+  let agent = await spawnWindow(t, { protocol: 'https', pipe: 'header(Cache-Control, no-store)' });
+  let previousUrl = await agent.execute_script(() => location.href);
+  await agent.forceSinglePrefetch(previousUrl);
+  await agent.execute_script(() => {
+    window.executor.suspend(() => location.reload());
+  });
+
+  assert_equals(previousUrl, await agent.execute_script(() => location.href));
+  assert_prefetched(await agent.getRequestHeaders(), "reload should use prefetch");
+}, "prefetches can be used for reload navigations");
+</script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/redirect-url.https.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/redirect-url.https.html
index 8515c610269..07db405dc3f 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prefetch/redirect-url.https.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/redirect-url.https.html
@@ -13,7 +13,6 @@
     insertSpeculationRules({ prefetch: [{ source: 'list', urls: [url] }] });
     await new Promise(resolve => t.step_timeout(resolve, 2000));
 
-    let was_prefetched = await isUrlPrefetched(url);
-    assert_true(was_prefetched, "redirected url should be prefetched");
+    assert_equals(await isUrlPrefetched(url), 1, "redirected url should be prefetched");
   }, "browser should be able to prefetch redirected urls");
 </script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
index 01e32ba1400..ce3db0f999a 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy-from-rules.https.html
@@ -6,7 +6,8 @@
 <meta name="variant" content="?2-2">
 <meta name="variant" content="?3-3">
 <meta name="variant" content="?4-4">
-<meta name="variant" content="?5-last">
+<meta name="variant" content="?5-5">
+<meta name="variant" content="?6-last">
 
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -34,6 +35,25 @@ subsetTest(promise_test, async t => {
   assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
 }, 'with "strict-origin" referrer policy in rule set overriding "strict-origin-when-cross-origin" of referring page');
 
+subsetTest(promise_test, async t => {
+  assert_implements(HTMLScriptElement.supports('speculationrules'), "Speculation Rules not supported");
+
+  const agent = await spawnWindow(t);
+  const next_url = agent.getExecutorURL({ page: 2 });
+  await agent.execute_script((url) => {
+    const a = addLink(url);
+    a.referrerPolicy = 'no-referrer';
+    insertDocumentRule(undefined, { referrer_policy: 'strict-origin' });
+  }, [next_url]);
+  await new Promise(resolve => t.step_timeout(resolve, 2000));
+  await agent.navigate(next_url);
+
+  const headers = await agent.getRequestHeaders();
+  assert_prefetched(headers, 'must be prefetched');
+  const expected_referrer = next_url.origin + '/';
+  assert_equals(headers.referer, expected_referrer, 'must send the origin as the referrer');
+}, 'with "strict-origin" referrer policy in rule set override "no-referrer" of link');
+
 subsetTest(promise_test, async t => {
   assert_implements(HTMLScriptElement.supports('speculationrules'), "Speculation Rules not supported");
 
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy.https.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy.https.html
index aaeae161e3c..1987d2e2ff4 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy.https.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/referrer-policy.https.html
@@ -4,7 +4,8 @@
 <!--Split test cases due to the use of timeouts in speculation rules test utilities.-->
 <meta name="variant" content="?1-1">
 <meta name="variant" content="?2-2">
-<meta name="variant" content="?3-last">
+<meta name="variant" content="?3-3">
+<meta name="variant" content="?4-last">
 
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -63,4 +64,25 @@ subsetTest(promise_test, async t => {
   assert_equals(headers.referer, '', "must send no referrer");
 }, 'with "no-referrer" referrer policy');
 
+subsetTest(promise_test, async t => {
+  assert_implements(HTMLScriptElement.supports('speculationrules'), "Speculation Rules not supported");
+
+  const agent = await spawnWindow(t);
+  await agent.setReferrerPolicy("no-referrer");
+
+  const next_url = agent.getExecutorURL({ page: 2 });
+  await agent.execute_script((url) => {
+    const a = addLink(url);
+    a.referrerPolicy = 'strict-origin';
+    insertDocumentRule();
+  }, [next_url]);
+  await new Promise(resolve => t.step_timeout(resolve, 2000));
+  await agent.navigate(next_url);
+
+  const headers = await agent.getRequestHeaders();
+  const expected_referrer = next_url.origin + '/';
+  assert_prefetched(headers, 'must be prefetched');
+  assert_equals(headers.referer, expected_referrer);
+}, 'with "strict-origin" link referrer policy overriding "no-referrer" of referring page');
+
 </script>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/resources/utils.sub.js b/tests/wpt/web-platform-tests/speculation-rules/prefetch/resources/utils.sub.js
index f532f35450e..b29dd6bba13 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prefetch/resources/utils.sub.js
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/resources/utils.sub.js
@@ -96,14 +96,17 @@ class PrefetchAgent extends RemoteContext {
   }
 }
 
+// Produces a URL with a UUID which will record when it's prefetched.
+// |extra_params| can be specified to add extra search params to the generated
+// URL.
+function getPrefetchUrl(extra_params={}) {
+  let params = new URLSearchParams({ uuid: token(), ...extra_params });
+  return new URL(`prefetch.py?${params}`, SR_PREFETCH_UTILS_URL);
+}
+
 // Produces n URLs with unique UUIDs which will record when they are prefetched.
 function getPrefetchUrlList(n) {
-  let urls = [];
-  for (let i=0; i<n; i++) {
-    let params = new URLSearchParams({uuid: token()});
-    urls.push(new URL(`prefetch.py?${params}`, SR_PREFETCH_UTILS_URL));
-  }
-  return urls;
+  return Array.from({ length: n }, () => getPrefetchUrl());
 }
 
 function getRedirectUrl() {
@@ -132,6 +135,28 @@ function insertSpeculationRules(body) {
   document.head.appendChild(script);
 }
 
+// Creates and appends <a href=|href|> to |insertion point|. If
+// |insertion_point| is not specified, document.body is used.
+function addLink(href, insertion_point=document.body) {
+  const a = document.createElement('a');
+  a.href = href;
+  insertion_point.appendChild(a);
+  return a;
+}
+
+// Inserts a prefetch document rule with |predicate|. |predicate| can be
+// undefined, in which case the default predicate will be used (i.e. all links
+// in document will match).
+function insertDocumentRule(predicate, extra_options={}) {
+  insertSpeculationRules({
+    prefetch: [{
+      source: 'document',
+      where: predicate,
+      ...extra_options
+    }]
+  });
+}
+
 function assert_prefetched (requestHeaders, description) {
   assert_in_array(requestHeaders.purpose, ["", "prefetch"], "The vendor-specific header Purpose, if present, must be 'prefetch'.");
   assert_equals(requestHeaders.sec_purpose, "prefetch", description);
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-non-successful.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-non-successful.html
index 00701f1471e..149971719cc 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-non-successful.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-non-successful.html
@@ -1,5 +1,11 @@
 <!DOCTYPE html>
 <title>Check that non-successful responses result in discarding the prerender</title>
+<meta name="variant" content="?code=204">
+<meta name="variant" content="?code=205">
+<meta name="variant" content="?code=402">
+<meta name="variant" content="?code=404">
+<meta name="variant" content="?code=500">
+<meta name="variant" content="?code=503">
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -11,17 +17,14 @@
 
 setup(() => assertSpeculationRulesIsSupported());
 
-function test_prerender_response_code(code) {
-  promise_test(async t => {
-    const {exec, tryToActivate} = await create_prerendered_page(t, {code});
-    const result = await tryToActivate();
-    assert_equals(result, 'discarded');
-  },`Responses with code ${code} should be discarded`);
-}
+const params = new URLSearchParams(window.location.search);
+const code = params.get('code');
 
-for (const code of [204, 205, 402, 404, 500, 503]) {
-  test_prerender_response_code(code);
-}
+promise_test(async t => {
+  const {exec, tryToActivate} = await create_prerendered_page(t, {code});
+  const result = await tryToActivate();
+  assert_equals(result, 'discarded');
+},`Responses with code ${code} should be discarded`);
 
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-successful.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-successful.html
index cc70b8c641d..adf8a8932f7 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-successful.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/response-code-successful.html
@@ -1,5 +1,9 @@
 <!DOCTYPE html>
 <title>Check that successful responses result in activating the prerender</title>
+<meta name="variant" content="?code=200">
+<meta name="variant" content="?code=201">
+<meta name="variant" content="?code=202">
+<meta name="variant" content="?code=203">
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -11,17 +15,14 @@
 
 setup(() => assertSpeculationRulesIsSupported());
 
-function test_prerender_response_code(code) {
-  promise_test(async t => {
-    const {exec, tryToActivate} = await create_prerendered_page(t, {code});
-    const result = await tryToActivate();
-    assert_equals(result, 'activated');
-  },`Responses with code ${code} should be activated`);
-}
+const params = new URLSearchParams(window.location.search);
+const code = params.get('code');
 
-for (const code of [200, 201, 202, 203]) {
-  test_prerender_response_code(code);
-}
+promise_test(async t => {
+  const {exec, tryToActivate} = await create_prerendered_page(t, {code});
+  const result = await tryToActivate();
+  assert_equals(result, 'activated');
+},`Responses with code ${code} should be activated`);
 
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/svg/struct/reftests/nested-svg-through-display-contents.svg b/tests/wpt/web-platform-tests/svg/struct/reftests/nested-svg-through-display-contents.svg
index f5440303502..1be64d5242f 100644
--- a/tests/wpt/web-platform-tests/svg/struct/reftests/nested-svg-through-display-contents.svg
+++ b/tests/wpt/web-platform-tests/svg/struct/reftests/nested-svg-through-display-contents.svg
@@ -2,26 +2,12 @@
 <svg viewBox="0 0 400 400" width="400" height="400" stroke="none" id="s1"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:h="http://www.w3.org/1999/xhtml">
- <h:link rel="match" href="reference/nested-svg-through-display-contents-ref.svg"/>
+ <h:link rel="match" href="reference/green-100x100.svg"/>
  <h:link rel="help" href="https://svgwg.org/svg2-draft/struct.html#ForeignNamespaces"/>
- <rect x="90" y="100" width="300" height="100" fill="rgba(255,0,0,0.5)"></rect>
- <script><![CDATA[
-const SVG_NS = 'http://www.w3.org/2000/svg';
-const XHTML_NS = 'http://www.w3.org/1999/xhtml';
-
-const div1 = document.createElementNS(XHTML_NS, 'div');
-div1.style.display = 'contents';
-div1.innerHTML = `<svg xmlns="${SVG_NS}" width="70%" height="70%">
-  <rect x="50" y="50" width="300" height="100" fill="rgba(0,0,255,0.5)"></rect>
-</svg>`;
-
-const div2 = document.createElementNS(XHTML_NS, 'div');
-div2.style.display = 'contents';
-div2.innerHTML = `<svg xmlns="${SVG_NS}" width="300" height="200">
-  <rect x="70" y="75" width="300" height="100" fill="rgba(0,255,0,0.5)"></rect>
-</svg>`;
-
-document.documentElement.insertBefore(div2, document.documentElement.firstChild);
-document.documentElement.insertBefore(div1, div2);
-]]></script>
+ <rect x="0" y="0" width="100" height="100" fill="green"></rect>
+ <h:div style="display: contents">
+  <svg width="300" height="300">
+   <rect x="5" y="5" width="100" height="100" fill="red"></rect>
+  </svg>
+ </h:div>
 </svg>
diff --git a/tests/wpt/web-platform-tests/svg/struct/reftests/reference/nested-svg-through-display-contents-ref.svg b/tests/wpt/web-platform-tests/svg/struct/reftests/reference/nested-svg-through-display-contents-ref.svg
deleted file mode 100644
index 622978f3788..00000000000
--- a/tests/wpt/web-platform-tests/svg/struct/reftests/reference/nested-svg-through-display-contents-ref.svg
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0"?>
-<svg viewBox="0 0 400 400" width="400" height="400" stroke="none" xmlns="http://www.w3.org/2000/svg">
- <rect x="90" y="100" width="300" height="100" fill="rgba(255,0,0,0.5)"></rect>
-</svg>
diff --git a/tests/wpt/web-platform-tests/uievents/mouse/attributes.html b/tests/wpt/web-platform-tests/uievents/mouse/attributes.html
new file mode 100644
index 00000000000..bbc388445c0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/uievents/mouse/attributes.html
@@ -0,0 +1,61 @@
+<!DOCTYPE HTML>
+<title>MouseEvent attributes</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/utils.js"></script>
+
+<span id="left">Left</span> <span id="right">Right</span>
+
+<script>
+  'use strict';
+
+  const event_list = ["mouseover", "mouseenter", "mousemove",
+                      "mousedown", "mouseup", "mouseout", "mouseleave"];
+
+  promise_test(async () => {
+      let left = document.getElementById("left");
+      let right = document.getElementById("right");
+
+      let event_promises = [];
+      event_list.forEach(ename => event_promises.push(getEvent(ename, right)));
+
+      let actions = new test_driver.Actions().addPointer("TestPointer", "mouse")
+          .pointerMove(0, 0, {origin: left})
+          .pointerDown()
+          .pointerUp()
+          .pointerMove(0, 0, {origin: right})
+          .pointerDown()
+          .pointerUp()
+          .pointerMove(0, 0, {origin: left})
+          .pointerDown()
+          .pointerUp()
+      await actions.send();
+
+      for (let i = 0; i < event_promises.length; i++) {
+          let e = await event_promises[i];
+
+          assert_equals(e.constructor, window.MouseEvent,
+                        e.type + " should use a MouseEvent constructor");
+          assert_true(e instanceof MouseEvent,
+                      e.type + " should be a MouseEvent");
+
+          assert_true(e.isTrusted,
+                      e.type + ".isTrusted attribute");
+
+          assert_equals(e.composed,
+                        e.type != 'mouseenter' && e.type != 'mouseleave',
+                        e.type + ".composed attribute");
+
+          assert_equals(e.bubbles,
+                        e.type != 'mouseenter' && e.type != 'mouseleave',
+                        e.type + ".bubbles attribute");
+
+          assert_equals(e.cancelable,
+                        e.type != 'mouseenter' && e.type != 'mouseleave',
+                        e.type + ".cancelable attribute");
+      }
+  }, "MouseEvent attributes");
+</script>
diff --git a/tests/wpt/web-platform-tests/web-bundle/README.md b/tests/wpt/web-platform-tests/web-bundle/README.md
index 90c13069bac..3e300818e24 100644
--- a/tests/wpt/web-platform-tests/web-bundle/README.md
+++ b/tests/wpt/web-platform-tests/web-bundle/README.md
@@ -5,6 +5,6 @@ This directory contains tests for the
 [webpackage repository](https://github.com/WICG/webpackage).
 To install them, run:
 ```
-go get -u github.com/WICG/webpackage/go/bundle/cmd/...
+go install github.com/WICG/webpackage/go/bundle/cmd/...@latest
 export PATH=$PATH:$(go env GOPATH)/bin
 ```
diff --git a/tests/wpt/web-platform-tests/web-bundle/resources/generate-test-wbns.sh b/tests/wpt/web-platform-tests/web-bundle/resources/generate-test-wbns.sh
index be854344156..418a56e0e7c 100755
--- a/tests/wpt/web-platform-tests/web-bundle/resources/generate-test-wbns.sh
+++ b/tests/wpt/web-platform-tests/web-bundle/resources/generate-test-wbns.sh
@@ -4,7 +4,7 @@ set -e
 
 if ! command -v gen-bundle > /dev/null 2>&1; then
     echo "gen-bundle is not installed. Please run:"
-    echo "  go get -u github.com/WICG/webpackage/go/bundle/cmd/..."
+    echo "  go install github.com/WICG/webpackage/go/bundle/cmd/...@latest"
     echo '  export PATH=$PATH:$(go env GOPATH)/bin'
     exit 1
 fi
diff --git a/tests/wpt/web-platform-tests/web-share/disabled-by-permissions-policy-cross-origin.https.sub.html b/tests/wpt/web-platform-tests/web-share/disabled-by-permissions-policy-cross-origin.https.sub.html
index 78562419841..773da84c0c5 100644
--- a/tests/wpt/web-platform-tests/web-share/disabled-by-permissions-policy-cross-origin.https.sub.html
+++ b/tests/wpt/web-platform-tests/web-share/disabled-by-permissions-policy-cross-origin.https.sub.html
@@ -33,7 +33,7 @@
 
     async function loadIframe(t, src, allowList) {
       const iframe = document.createElement("iframe");
-      if (allowList !== null) iframe.allow = allowList;
+      if (allowList !== undefined) iframe.allow = allowList;
       t.add_cleanup(() => {
         iframe.remove();
       });
@@ -58,7 +58,7 @@
 
     promise_test(async (t) => {
       assert_true("share" in navigator, "navigator.share is exposed");
-      const iframe = await loadIframe(t, crossOriginSrc, "web-share=()");
+      const iframe = await loadIframe(t, crossOriginSrc, "web-share 'none'");
       const iframeWindow = iframe.contentWindow;
       iframeWindow.postMessage({ action: "share", data: shareData }, "*");
       const data = await waitForMessage("share");
@@ -68,7 +68,7 @@
 
     promise_test(async (t) => {
       assert_true("share" in navigator, "navigator.share is exposed");
-      const iframe = await loadIframe(t, crossOriginSrc, "web-share=(self)");
+      const iframe = await loadIframe(t, crossOriginSrc, "web-share 'self'");
       const iframeWindow = iframe.contentWindow;
       iframeWindow.postMessage({ action: "share", data: shareData }, "*");
       const data = await waitForMessage("share");
@@ -106,7 +106,7 @@
 
     promise_test(async (t) => {
       assert_true("canShare" in navigator, "navigator.canShare is exposed");
-      const iframe = await loadIframe(t, sameOriginPath, "web-share=(self)");
+      const iframe = await loadIframe(t, sameOriginPath, "web-share 'self'");
       iframe.contentWindow.postMessage(
         { action: "canShare", data: shareData },
         "*"
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_tab.py b/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_tab.py
index 270e4b51b88..f6cacf3c358 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_tab.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_tab.py
@@ -61,3 +61,29 @@ def test_sets_no_opener(session):
 
     session.window_handle = value["handle"]
     assert opener(session) is None
+
+
+def test_focus_content(session, inline):
+    response = new_window(session, type_hint="tab")
+    value = assert_success(response)
+    assert value["type"] == "tab"
+
+    session.window_handle = value["handle"]
+
+    session.url = inline("""
+        <span contenteditable="true"> abc </span>
+        <script>
+            const selection = getSelection();
+            window.onload = async() => {
+                const initial = document.querySelector("span");
+                initial.focus();
+                initial.setAttribute(
+                    "_focused",
+                    selection.anchorNode == initial.firstChild
+                );
+            }
+        </script>
+    """)
+
+    elem = session.find.css("span", all=False)
+    assert elem.attribute("_focused") == "true"
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_window.py b/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_window.py
index d3c22450270..a3fce364ccc 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_window.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/new_window/new_window.py
@@ -61,3 +61,29 @@ def test_sets_no_opener(session):
 
     session.window_handle = value["handle"]
     assert opener(session) is None
+
+
+def test_focus_content(session, inline):
+    response = new_window(session, type_hint="window")
+    value = assert_success(response)
+    assert value["type"] == "window"
+
+    session.window_handle = value["handle"]
+
+    session.url = inline("""
+        <span contenteditable="true"> abc </span>
+        <script>
+            const selection = getSelection();
+            window.onload = async() => {
+                const initial = document.querySelector("span");
+                initial.focus();
+                initial.setAttribute(
+                    "_focused",
+                    selection.anchorNode == initial.firstChild
+                );
+            }
+        </script>
+    """)
+
+    elem = session.find.css("span", all=False)
+    assert elem.attribute("_focused") == "true"
diff --git a/tests/wpt/web-platform-tests/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js b/tests/wpt/web-platform-tests/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js
new file mode 100644
index 00000000000..f93464005d0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.js
@@ -0,0 +1,18 @@
+"use strict";
+
+test(() => {
+  const observableArray = document.adoptedStyleSheets;
+
+  let leaked_target = null;
+  let leaked_handler = null;
+
+  let target_leaker = (target) => { leaked_target = target; return null; };
+  Object.defineProperty(Object.prototype, "getPrototypeOf", {get: function() {
+    leaked_handler = this;
+    return target_leaker;
+  }})
+  Object.getPrototypeOf(observableArray);
+
+  assert_equals(leaked_target, null, "The proxy target leaked.");
+  assert_equals(leaked_handler, null, "The proxy handler leaked.");
+}, "ObservableArray's internals won't leak");
diff --git a/tests/wpt/web-platform-tests/webrtc-encoded-transform/RTCEncodedVideoFrame-clone.https.html b/tests/wpt/web-platform-tests/webrtc-encoded-transform/RTCEncodedVideoFrame-clone.https.html
new file mode 100644
index 00000000000..29330729dcc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc-encoded-transform/RTCEncodedVideoFrame-clone.https.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>RTCEncodedVideoFrame can be cloned and distributed</title>
+<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 src='../mediacapture-streams/permission-helper.js'></script>
+<script src="../webrtc/RTCPeerConnection-helper.js"></script>
+<script src="../service-workers/service-worker/resources/test-helpers.sub.js"></script>
+
+<script>
+"use strict";
+promise_test(async t => {
+  const caller = new RTCPeerConnection({encodedInsertableStreams:true});
+  t.add_cleanup(() => caller.close());
+  const callee = new RTCPeerConnection({encodedInsertableStreams:true});
+  t.add_cleanup(() => callee.close());
+
+  await setMediaPermission("granted", ["camera"]);
+  const stream = await navigator.mediaDevices.getUserMedia({video:true});
+  const videoTrack = stream.getVideoTracks()[0];
+  t.add_cleanup(() => videoTrack.stop());
+
+  const videoSender = caller.addTrack(videoTrack)
+  const senderStreams = videoSender.createEncodedStreams();
+  const senderReader = senderStreams.readable.getReader();
+  const senderWriter = senderStreams.writable.getWriter();
+
+  exchangeIceCandidates(caller, callee);
+
+  // Send 10 frames and stop
+  const numFramesToSend = 10;
+
+  const framesReceivedCorrectly = new Promise((resolve, reject) => {
+    callee.ontrack = async e => {
+      const receiverStreams = e.receiver.createEncodedStreams();
+      const receiverReader = receiverStreams.readable.getReader();
+      const receiverWriter = receiverStreams.writable.getWriter();
+
+      // This should all be able to happen in 5 seconds.
+      // For fast failures, uncomment this line.
+      // t.step_timeout(reject, 5000);
+      for (let i = 0; i < numFramesToSend; i++) {
+        const result = await receiverReader.read();
+        // Write upstream, purely to avoid "no frame received" error messages
+        receiverWriter.write(result.value);
+      }
+      resolve();
+    }
+  });
+
+  await exchangeOfferAnswer(caller, callee);
+
+  for (let i = 0; i < numFramesToSend; i++) {
+    const result = await senderReader.read();
+    senderWriter.write(result.value.clone());
+  }
+  return framesReceivedCorrectly;
+}, "Cloning before sending works");
+</script>