diff --git a/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini
index 62c2d998e8f..68bf21994e8 100644
--- a/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -4,7 +4,7 @@
     expected: TIMEOUT
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Fetching a blob URL immediately before revoking it works in an iframe.]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
index 51432362d66..ee34bc91078 100644
--- a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
@@ -1,3 +1,6 @@
 [block-in-inline-hittest-002.html]
   [elementsFromPoint]
     expected: FAIL
+
+  [elementFromPoint]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini b/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini
deleted file mode 100644
index 3e5096beef3..00000000000
--- a/tests/wpt/metadata-layout-2020/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[block-in-inline-hittest-float-002.html]
-  [block-in-inline-hittest-float-002]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-anonymous-box.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-anonymous-box.html.ini
new file mode 100644
index 00000000000..b8f8d45a31f
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-anonymous-box.html.ini
@@ -0,0 +1,3 @@
+[hittest-anonymous-box.html]
+  [Hit-testing within an anonymous flex-item should return the flexbox as the hittest result.]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini
deleted file mode 100644
index 5b685485f3c..00000000000
--- a/tests/wpt/metadata-layout-2020/css/css-flexbox/hittest-before-pseudo.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hittest-before-pseudo.html]
-  [Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.]
-    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 bf767066a79..e75a38dad1d 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
@@ -173,9 +173,6 @@
   [Matching font-style: 'oblique -10deg' should prefer 'oblique -60deg -30deg' over 'oblique -50deg -40deg']
     expected: FAIL
 
-  [Matching font-style: 'oblique -10deg' should prefer 'italic' over 'oblique 0deg 10deg']
-    expected: FAIL
-
   [Matching font-stretch: '110%' should prefer '105%' over '100%']
     expected: FAIL
 
@@ -293,9 +290,6 @@
   [Matching font-weight: '399' should prefer '350 399' over '340 360']
     expected: FAIL
 
-  [Matching font-style: 'italic' should prefer 'oblique 0deg' over 'oblique -60deg -30deg']
-    expected: FAIL
-
   [Matching font-style: 'oblique 21deg' should prefer 'italic' over 'oblique 0deg']
     expected: FAIL
 
@@ -313,3 +307,12 @@
 
   [Matching font-style: 'oblique 20deg' should prefer 'italic' over 'oblique 0deg']
     expected: FAIL
+
+  [Matching font-weight: '430' should prefer '450 460' over '500']
+    expected: FAIL
+
+  [Matching font-stretch: '110%' should prefer '110% 120%' over '115% 116%']
+    expected: FAIL
+
+  [Matching font-style: 'italic' should prefer 'italic' over 'oblique 20deg']
+    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 c83b87a483a..f68eb40c074 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
@@ -325,3 +325,303 @@
 
   [margin-right length(mm) / 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
+
+  [color color(rgba) / values]
+    expected: FAIL
+
+  [font-size length(pt) / values]
+    expected: FAIL
+
+  [font-size length(pc) / values]
+    expected: FAIL
+
+  [font-size length(px) / values]
+    expected: FAIL
+
+  [font-size length(em) / values]
+    expected: FAIL
+
+  [font-size length(ex) / values]
+    expected: FAIL
+
+  [font-size length(mm) / values]
+    expected: FAIL
+
+  [font-size length(cm) / values]
+    expected: FAIL
+
+  [font-size length(in) / values]
+    expected: FAIL
+
+  [font-size percentage(%) / values]
+    expected: FAIL
+
+  [font-weight font-weight(keyword) / values]
+    expected: FAIL
+
+  [font-weight font-weight(numeric) / values]
+    expected: FAIL
+
+  [line-height number(integer) / values]
+    expected: FAIL
+
+  [line-height number(decimal) / values]
+    expected: FAIL
+
+  [line-height length(pt) / values]
+    expected: FAIL
+
+  [line-height length(pc) / values]
+    expected: FAIL
+
+  [line-height length(px) / values]
+    expected: FAIL
+
+  [line-height length(em) / values]
+    expected: FAIL
+
+  [line-height length(ex) / values]
+    expected: FAIL
+
+  [line-height length(mm) / values]
+    expected: FAIL
+
+  [line-height length(cm) / values]
+    expected: FAIL
+
+  [line-height length(in) / values]
+    expected: FAIL
+
+  [line-height percentage(%) / values]
+    expected: FAIL
+
+  [letter-spacing length(pt) / values]
+    expected: FAIL
+
+  [letter-spacing length(pc) / values]
+    expected: FAIL
+
+  [letter-spacing length(px) / values]
+    expected: FAIL
+
+  [letter-spacing length(em) / values]
+    expected: FAIL
+
+  [letter-spacing length(ex) / values]
+    expected: FAIL
+
+  [letter-spacing length(mm) / values]
+    expected: FAIL
+
+  [letter-spacing length(cm) / values]
+    expected: FAIL
+
+  [letter-spacing length(in) / values]
+    expected: FAIL
+
+  [word-spacing length(pt) / values]
+    expected: FAIL
+
+  [word-spacing length(pc) / values]
+    expected: FAIL
+
+  [word-spacing length(px) / values]
+    expected: FAIL
+
+  [word-spacing length(em) / values]
+    expected: FAIL
+
+  [word-spacing length(ex) / values]
+    expected: FAIL
+
+  [word-spacing length(mm) / values]
+    expected: FAIL
+
+  [word-spacing length(cm) / values]
+    expected: FAIL
+
+  [word-spacing length(in) / values]
+    expected: FAIL
+
+  [word-spacing percentage(%) / values]
+    expected: FAIL
+
+  [text-indent length(pt) / values]
+    expected: FAIL
+
+  [text-indent length(pc) / values]
+    expected: FAIL
+
+  [text-indent length(px) / values]
+    expected: FAIL
+
+  [text-indent length(em) / values]
+    expected: FAIL
+
+  [text-indent length(ex) / values]
+    expected: FAIL
+
+  [text-indent length(mm) / values]
+    expected: FAIL
+
+  [text-indent length(cm) / values]
+    expected: FAIL
+
+  [text-indent length(in) / values]
+    expected: FAIL
+
+  [text-indent percentage(%) / values]
+    expected: FAIL
+
+  [text-shadow shadow(shadow) / values]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-ui/appearance-cssom-001.html.ini b/tests/wpt/metadata-layout-2020/css/css-ui/appearance-cssom-001.html.ini
index 0881e7f64be..feca770c995 100644
--- a/tests/wpt/metadata-layout-2020/css/css-ui/appearance-cssom-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-ui/appearance-cssom-001.html.ini
@@ -983,3 +983,172 @@
   [-webkit-appearance: tab-scroll-arrow-forward (invalid)]
     expected: FAIL
 
+  [-webkit-appearance: button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: checkbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: listbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: menulist (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: meter (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: radio (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: searchfield (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: textarea (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: push-button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: square-button (compat)]
+    expected: FAIL
+
+  [appearance: button (compat)]
+    expected: FAIL
+
+  [appearance: checkbox (compat)]
+    expected: FAIL
+
+  [appearance: listbox (compat)]
+    expected: FAIL
+
+  [appearance: menulist (compat)]
+    expected: FAIL
+
+  [appearance: meter (compat)]
+    expected: FAIL
+
+  [appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [appearance: radio (compat)]
+    expected: FAIL
+
+  [appearance: searchfield (compat)]
+    expected: FAIL
+
+  [appearance: textarea (compat)]
+    expected: FAIL
+
+  [appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [appearance: push-button (compat)]
+    expected: FAIL
+
+  [appearance: square-button (compat)]
+    expected: FAIL
+
+
+[appearance-cssom-001.html?exclude=Invalid]
+  [-webkit-appearance: none]
+    expected: FAIL
+
+  [-webkit-appearance: auto]
+    expected: FAIL
+
+  [-webkit-appearance: textfield]
+    expected: FAIL
+
+  [-webkit-appearance: menulist-button]
+    expected: FAIL
+
+  [-webkit-appearance: button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: checkbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: listbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: menulist (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: meter (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: radio (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: searchfield (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: textarea (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: push-button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: square-button (compat)]
+    expected: FAIL
+
+  [appearance: none]
+    expected: FAIL
+
+  [appearance: auto]
+    expected: FAIL
+
+  [appearance: textfield]
+    expected: FAIL
+
+  [appearance: menulist-button]
+    expected: FAIL
+
+  [appearance: button (compat)]
+    expected: FAIL
+
+  [appearance: checkbox (compat)]
+    expected: FAIL
+
+  [appearance: listbox (compat)]
+    expected: FAIL
+
+  [appearance: menulist (compat)]
+    expected: FAIL
+
+  [appearance: meter (compat)]
+    expected: FAIL
+
+  [appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [appearance: radio (compat)]
+    expected: FAIL
+
+  [appearance: searchfield (compat)]
+    expected: FAIL
+
+  [appearance: textarea (compat)]
+    expected: FAIL
+
+  [appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [appearance: push-button (compat)]
+    expected: FAIL
+
+  [appearance: square-button (compat)]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
new file mode 100644
index 00000000000..f18b8d2fcf9
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/CaretPosition-001.html.ini
@@ -0,0 +1,3 @@
+[CaretPosition-001.html]
+  [Element at (400, 100)]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
index cf67b5d03dd..80ed711305d 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
@@ -1,3 +1,4 @@
 [elementFromPoint-dynamic-anon-box.html]
+  expected: CRASH
   [Link should be clickable after hiding a scrollbox with an anonymous table inside]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini
deleted file mode 100644
index b905fe70fcb..00000000000
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-ellipsis-in-inline-box.html]
-  [elementFromPoint-ellipsis-in-inline-box]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-float-in-relative.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-float-in-relative.html.ini
deleted file mode 100644
index 7e9331b6bc2..00000000000
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-float-in-relative.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-float-in-relative.html]
-  [elementFromPoint-float-in-relative]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-list-001.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-list-001.html.ini
index 1f892861935..f50036a37ba 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-list-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-list-001.html.ini
@@ -13,3 +13,6 @@
 
   [<li>Outside 1</li>]
     expected: FAIL
+
+  [<li>Image Inside 2</li>]
+    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/fetch/api/basic/keepalive.any.js.ini b/tests/wpt/metadata-layout-2020/fetch/api/basic/keepalive.any.js.ini
index e9ab91fc80e..4c1c78640bb 100644
--- a/tests/wpt/metadata-layout-2020/fetch/api/basic/keepalive.any.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/api/basic/keepalive.any.js.ini
@@ -1,3 +1,4 @@
 [keepalive.any.html]
+  expected: TIMEOUT
   [keepalive in onunload in nested frame in another window]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/api/redirect/redirect-keepalive.any.js.ini b/tests/wpt/metadata-layout-2020/fetch/api/redirect/redirect-keepalive.any.js.ini
new file mode 100644
index 00000000000..c57e48f2078
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/fetch/api/redirect/redirect-keepalive.any.js.ini
@@ -0,0 +1,2 @@
+[redirect-keepalive.any.html]
+  expected: TIMEOUT
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 ed2ce3392d0..0d48169e3cc 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
@@ -147,8 +147,5 @@
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
 
-  [border-image sec-fetch-mode - Not sent to non-trustworthy cross-site destination]
-    expected: FAIL
-
-  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
-    expected: FAIL
+  [background-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
index a3f473a9557..1f528be38ef 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
@@ -1,4 +1,4 @@
 [scroll-restoration-fragment-scrolling-cross-origin.html]
-  expected: TIMEOUT
+  expected: ERROR
   [Manual scroll restoration should take precedent over scrolling to fragment in cross origin navigation]
     expected: TIMEOUT
diff --git a/tests/wpt/metadata-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 149bcb4ff8c..b8fd22e2b81 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
@@ -10,3 +10,6 @@
 
   [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
     expected: FAIL
+
+  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
+    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 5aef7ce66ce..324db3d9b35 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
@@ -10,6 +10,3 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL
diff --git a/tests/wpt/metadata-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..b169452e04a 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
@@ -10,12 +10,3 @@
 
   [0080 00FF set in href="" targeting a frame and clicked]
     expected: FAIL
-
-  [0080 00FF 0100 set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [D83D DE0D set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [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/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/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
deleted file mode 100644
index 60a4fa51f8a..00000000000
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[a-click.html]
-  [aElement.click() before the load event must NOT replace]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
new file mode 100644
index 00000000000..ca84728f1e9
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
@@ -0,0 +1,4 @@
+[creating_browsing_context_test_01.html]
+  expected: TIMEOUT
+  [first argument: absolute url]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
deleted file mode 100644
index adaff1bb3fe..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
index 76d431df3a0..bea609ed103 100644
--- a/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini
deleted file mode 100644
index 844abdcced8..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.image.html]
-  [OffscreenCanvas test: 2d.composite.globalAlpha.image]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini
deleted file mode 100644
index a66bd4c9607..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.image.worker.html]
-  [2d]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini
deleted file mode 100644
index 5dd24f42848..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.imagepattern.html]
-  [OffscreenCanvas test: 2d.composite.globalAlpha.imagepattern]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini
deleted file mode 100644
index 1718e787f1c..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.imagepattern.worker.html]
-  [2d]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini
deleted file mode 100644
index f312f1589b8..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.basic.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.basic]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini
deleted file mode 100644
index 2ff0b98dcb5..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.basic.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini
deleted file mode 100644
index 3e8e707a8be..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcepos.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.sourcepos]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini
deleted file mode 100644
index 3ec5cbbadc9..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcepos.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini
deleted file mode 100644
index 44ad1e2efb0..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcesize.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.sourcesize]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini
deleted file mode 100644
index 150dc88d58e..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcesize.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini
deleted file mode 100644
index 0b04a0d852d..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.alpha.html]
-  [OffscreenCanvas test: 2d.drawImage.alpha]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini
deleted file mode 100644
index 93ca873d5aa..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.alpha.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
deleted file mode 100644
index dba65871688..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.animated.poster.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
deleted file mode 100644
index 19ec8e5782b..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.animated.poster.worker.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini
deleted file mode 100644
index 38c46fe7e71..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.broken.html]
-  [OffscreenCanvas test: 2d.drawImage.broken]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini
deleted file mode 100644
index b85d2727a7a..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.broken.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini
deleted file mode 100644
index ddc364f4b22..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.clip.html]
-  [OffscreenCanvas test: 2d.drawImage.clip]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini
deleted file mode 100644
index f387c1acd65..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.clip.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini
deleted file mode 100644
index 0d1eb846146..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.composite.html]
-  [OffscreenCanvas test: 2d.drawImage.composite]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini
deleted file mode 100644
index 14975992b26..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.composite.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini
deleted file mode 100644
index e3c09955f13..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.floatsource.html]
-  [OffscreenCanvas test: 2d.drawImage.floatsource]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini
deleted file mode 100644
index 5186c30c1a7..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.floatsource.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini
deleted file mode 100644
index d9c00e020cb..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedest.html]
-  [Negative destination width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini
deleted file mode 100644
index 31b9ec54018..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedest.worker.html]
-  [Negative destination width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini
deleted file mode 100644
index cf30b485857..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedir.html]
-  [Negative dimensions do not affect the direction of the image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini
deleted file mode 100644
index b789fbb639b..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedir.worker.html]
-  [Negative dimensions do not affect the direction of the image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini
deleted file mode 100644
index fe6fe1317b3..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativesource.html]
-  [Negative source width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini
deleted file mode 100644
index d20b4175b81..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativesource.worker.html]
-  [Negative source width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini
deleted file mode 100644
index 968631ac458..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nonfinite.html]
-  [drawImage() with Infinity/NaN is ignored]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini
deleted file mode 100644
index d88e35b08a4..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nonfinite.worker.html]
-  [drawImage() with Infinity/NaN is ignored]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini
deleted file mode 100644
index aac6b35b06d..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nowrap.html]
-  [Stretched images do not get pixels wrapping around the edges]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini
deleted file mode 100644
index 61d2ac9b727..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nowrap.worker.html]
-  [Stretched images do not get pixels wrapping around the edges]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini
deleted file mode 100644
index 0a613ba46a2..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.path.html]
-  [OffscreenCanvas test: 2d.drawImage.path]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini
deleted file mode 100644
index e3dc6d5ad67..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.path.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
deleted file mode 100644
index adaff1bb3fe..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
deleted file mode 100644
index a97b8b37d07..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.worker.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini
deleted file mode 100644
index 43c1fd403c1..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.transform.html]
-  [OffscreenCanvas test: 2d.drawImage.transform]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini
deleted file mode 100644
index 864d3b3ba40..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.transform.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
index efa68741600..d6114b0db21 100644
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.html]
   [drawImage with zero-sized source rectangle throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
index 76d431df3a0..bea609ed103 100644
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
index 6f5d45f8dd9..2e4d62fc879 100644
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
+++ b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.worker.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
index a9d64261e96..a7f8c7ee0ce 100644
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
+++ b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.worker.html]
   [drawImage with zero-sized source rectangle throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
new file mode 100644
index 00000000000..09c049e4b58
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
@@ -0,0 +1,3 @@
+[media_fragment_seek.html]
+  [Video should seek to time specified in media fragment syntax]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index e8872b3585b..bbc1f35d8d9 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,4 +1,3 @@
 [iframe_sandbox_popups_nonescaping-1.html]
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
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 31928ad3947..31745fdcdcf 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
@@ -1,5 +1,4 @@
 [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/the-selectmenu-element/selectmenu-value-option.tentative.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html.ini
new file mode 100644
index 00000000000..693bd4e2994
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html.ini
@@ -0,0 +1,3 @@
+[selectmenu-value-option.tentative.html]
+  [selectmenu.value should reflect option.value]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/popovers/popover-target-element-disabled.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/popovers/popover-target-element-disabled.html.ini
new file mode 100644
index 00000000000..0273c7dae9a
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/popovers/popover-target-element-disabled.html.ini
@@ -0,0 +1,24 @@
+[popover-target-element-disabled.html]
+  [Disabled popover*target buttons should not affect the popover heirarchy.]
+    expected: FAIL
+
+  [Disabling popover*target buttons when popovers are open should still cause all popovers to be closed when the formerly outer popover is closed.]
+    expected: FAIL
+
+  [Disabling popover*target buttons when popovers are open should still cause all popovers to be closed when the formerly inner popover is closed.]
+    expected: FAIL
+
+  [Setting the form attribute on popover*target buttons when popovers are open should close all popovers.]
+    expected: FAIL
+
+  [Changing the input type on a popover*target button when popovers are open should close all popovers.]
+    expected: FAIL
+
+  [Disconnecting popover*target buttons when popovers are open should close all popovers.]
+    expected: FAIL
+
+  [Changing the popovertarget attribute to break the chain should close all popovers.]
+    expected: FAIL
+
+  [Modifying popovertarget on a button which doesn't break the chain shouldn't close any popovers.]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
deleted file mode 100644
index 2212b9d731f..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[async-script.html?reload]
-  expected: ERROR
-
-[async-script.html]
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-delayed.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
deleted file mode 100644
index fc0233f5241..00000000000
--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
new file mode 100644
index 00000000000..f9a4f08cd70
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
@@ -0,0 +1,3 @@
+[module-tla-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
diff --git a/tests/wpt/metadata-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 1d71471b73c..4a48dd15a9d 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
@@ -1,7 +1,6 @@
 [promise-rejection-events.html]
-  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: TIMEOUT
+    expected: FAIL
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/resource-timing/response-status-code.html.ini b/tests/wpt/metadata-layout-2020/resource-timing/response-status-code.html.ini
index b84e3cf7b11..38df5f01300 100644
--- a/tests/wpt/metadata-layout-2020/resource-timing/response-status-code.html.ini
+++ b/tests/wpt/metadata-layout-2020/resource-timing/response-status-code.html.ini
@@ -265,10 +265,10 @@
     expected: FAIL
 
   [This test validates the response status of resources. 88]
-    expected: TIMEOUT
+    expected: FAIL
 
   [This test validates the response status of resources. 89]
-    expected: NOTRUN
+    expected: TIMEOUT
 
   [This test validates the response status of resources. 90]
     expected: NOTRUN
diff --git a/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini b/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
index 20a8f9a4320..1f70062991c 100644
--- a/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata-layout-2020/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@@ -1,5 +1,4 @@
 [realtimeanalyser-fft-scaling.html]
-  expected: TIMEOUT
   [X 2048-point FFT peak position is not equal to 64. Got 0.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
@@ -0,0 +1,4 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/metadata-layout-2020/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
new file mode 100644
index 00000000000..80f9a4f15b8
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
@@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
index 282ab0b2525..cdeaf7f7080 100644
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -7,7 +7,7 @@
     expected: FAIL
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
     expected: TIMEOUT
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 8dba53dd1ca..4425fa85278 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
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@@ -409084,6 +409084,40 @@
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@@ -431698,7 +431724,17 @@
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@@ -438862,7 +438898,7 @@
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@@ -439047,7 +439083,13 @@
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@@ -439267,11 +439309,11 @@
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@@ -440643,7 +440685,7 @@
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@@ -441022,15 +441064,15 @@
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@@ -449153,7 +449195,7 @@
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@@ -449305,35 +449347,35 @@
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@@ -452810,7 +452852,7 @@
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@@ -453510,7 +453552,7 @@
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@@ -453548,10 +453590,18 @@
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       {
@@ -463405,6 +463455,10 @@
         [
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          "resources/support-promises.js"
+        ],
+        [
+         "script",
+         "/storage/buckets/resources/util.js"
         ]
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@@ -463424,6 +463478,10 @@
         [
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+        ],
+        [
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@@ -463443,6 +463501,10 @@
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+        ],
+        [
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@@ -463462,6 +463524,10 @@
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+        ],
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+         "script",
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@@ -495400,6 +495466,27 @@
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@@ -516403,7 +516490,7 @@
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@@ -519527,10 +519614,14 @@
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@@ -560106,7 +560197,7 @@
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        {
@@ -562112,6 +562203,108 @@
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+       {
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+          "script",
+          "/resources/testdriver.js"
+         ],
+         [
+          "script",
+          "/common/utils.js"
+         ],
+         [
+          "script",
+          "resources/fledge-util.js"
+         ]
+        ]
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+     "no-winner.https.sub.window.js": [
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+      [
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+       {
+        "script_metadata": [
+         [
+          "script",
+          "/resources/testdriver.js"
+         ],
+         [
+          "script",
+          "/common/utils.js"
+         ],
+         [
+          "script",
+          "resources/fledge-util.js"
+         ]
+        ]
+       }
+      ]
+     ],
+     "reporting-arguments.https.sub.window.js": [
+      "69b7d2fddda4e2a12f42b9549da8177c5dc0ccf3",
+      [
+       "fledge/tentative/reporting-arguments.https.sub.window.html",
+       {
+        "script_metadata": [
+         [
+          "script",
+          "/resources/testdriver.js"
+         ],
+         [
+          "script",
+          "/common/utils.js"
+         ],
+         [
+          "script",
+          "resources/fledge-util.js"
+         ],
+         [
+          "timeout",
+          "long"
+         ]
+        ],
+        "timeout": "long"
+       }
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+     ],
+     "send-report-to.https.sub.window.js": [
+      "bb0e7873a7024a562794d257441b038e5256f853",
+      [
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@@ -622712,7 +622920,7 @@
       ]
      ],
      "loaf-event-listener.html": [
-      "6349c28b3202262c444aaefc558620c7baa19ff3",
+      "f866a1dfd83b7af311e3ab9c03be6d19074ab901",
       [
        null,
        {
@@ -622721,7 +622929,7 @@
       ]
      ],
      "loaf-first-ui-event.html": [
-      "f2d8dac3f1179f2ba3d56295d6a44652728f55e6",
+      "b30b645d2fab262e77b922c0d0d075b23d1f844d",
       [
        null,
        {
@@ -635140,14 +635348,14 @@
    },
    "png": {
     "cicp-chunk.html": [
-     "4afc262dcf5ead61423a5bea21ae6e6f998a401c",
+     "8add5d602ea0c3478b27fd627e9ad5e9eb465083",
      [
       null,
       {}
      ]
     ],
     "trns-chunk.html": [
-     "652cda0e32089b7ade4e41c0f69a9637177bd9dd",
+     "3a24753382b20b4a1d5803ee64c730427dd62c54",
      [
       null,
       {}
@@ -652890,6 +653098,13 @@
         {}
        ]
       ],
+      "yield-priority-idle-callbacks.html": [
+       "d47e8c5eba2ed6eca2df695e93a4f1bb7a324b0b",
+       [
+        null,
+        {}
+       ]
+      ],
       "yield-priority-posttask.any.js": [
        "0700094dcf3679d18099204705c885005e070f74",
        [
@@ -656898,7 +657113,7 @@
       ]
      ],
      "cache-storage-buckets.https.any.js": [
-      "0b5ef7b298df64d9df1a79fa7e1fe3cd00178333",
+      "fd59ba464db0305de210fc2935d739b2469ec4ae",
       [
        "service-workers/cache-storage/cache-storage-buckets.https.any.html",
        {
@@ -656917,7 +657132,11 @@
          ],
          [
           "script",
-          "./resources/test-helpers.js"
+          "resources/test-helpers.js"
+         ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
          ],
          [
           "timeout",
@@ -656945,7 +657164,11 @@
          ],
          [
           "script",
-          "./resources/test-helpers.js"
+          "resources/test-helpers.js"
+         ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
          ],
          [
           "timeout",
@@ -656973,7 +657196,11 @@
          ],
          [
           "script",
-          "./resources/test-helpers.js"
+          "resources/test-helpers.js"
+         ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
          ],
          [
           "timeout",
@@ -657001,7 +657228,11 @@
          ],
          [
           "script",
-          "./resources/test-helpers.js"
+          "resources/test-helpers.js"
+         ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
          ],
          [
           "timeout",
@@ -663098,6 +663329,15 @@
       {}
      ]
     ],
+    "SpeechSynthesisEvent-properties.html": [
+     "f6c8f5fc321d8dca382205c741de742711225212",
+     [
+      null,
+      {
+       "testdriver": true
+      }
+     ]
+    ],
     "SpeechSynthesisUtterance-basics.https.html": [
      "2fd394150e941ccbeb8d63b99e598cc53e55446d",
      [
@@ -663139,7 +663379,7 @@
    "storage": {
     "buckets": {
      "buckets_storage_policy.tentative.https.any.js": [
-      "4aaa02e4be464a34ff02294ba2f6d5898b5904e2",
+      "d6dce3675d0bca18a379518c6ecf2c7ec1310930",
       [
        "storage/buckets/buckets_storage_policy.tentative.https.any.html",
        {
@@ -663148,6 +663388,10 @@
           "title",
           "Buckets API: Tests for bucket storage policies."
          ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
+         ],
          [
           "global",
           "window,worker"
@@ -663163,6 +663407,10 @@
           "title",
           "Buckets API: Tests for bucket storage policies."
          ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
+         ],
          [
           "global",
           "window,worker"
@@ -663178,6 +663426,10 @@
           "title",
           "Buckets API: Tests for bucket storage policies."
          ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
+         ],
          [
           "global",
           "window,worker"
@@ -663193,6 +663445,10 @@
           "title",
           "Buckets API: Tests for bucket storage policies."
          ],
+         [
+          "script",
+          "/storage/buckets/resources/util.js"
+         ],
          [
           "global",
           "window,worker"
@@ -663902,7 +664158,7 @@
      ]
     ],
     "storage-access-permission.sub.https.window.js": [
-     "82794061bd013ced4d8a42f3337fddd6a53d6d0a",
+     "f0aadf4828dcb549c0d66ef4745b1e190d56f8d6",
      [
       "storage-access-api/storage-access-permission.sub.https.window.html",
       {
@@ -664523,7 +664779,7 @@
       ]
      ],
      "general.any.js": [
-      "bec3480f65394461dea9cbdda84a5fe4c21e8ed5",
+      "faeb8e321af208543472e2d212c0701faeb09eb6",
       [
        "streams/piping/general.any.html",
        {
@@ -682490,7 +682746,7 @@
      ]
     ],
     "storage-buckets.tentative.https.any.js": [
-     "73cc0ac3725c36929357b702360035edb780c064",
+     "a6b4f59a95d715aaff638a3c2b3a6c9ab3532ab8",
      [
       "web-locks/storage-buckets.tentative.https.any.html",
       {
@@ -682503,6 +682759,10 @@
          "script",
          "resources/helpers.js"
         ],
+        [
+         "script",
+         "/storage/buckets/resources/util.js"
+        ],
         [
          "global",
          "window,dedicatedworker,sharedworker,serviceworker"
@@ -682522,6 +682782,10 @@
          "script",
          "resources/helpers.js"
         ],
+        [
+         "script",
+         "/storage/buckets/resources/util.js"
+        ],
         [
          "global",
          "window,dedicatedworker,sharedworker,serviceworker"
@@ -682541,6 +682805,10 @@
          "script",
          "resources/helpers.js"
         ],
+        [
+         "script",
+         "/storage/buckets/resources/util.js"
+        ],
         [
          "global",
          "window,dedicatedworker,sharedworker,serviceworker"
@@ -682560,6 +682828,10 @@
          "script",
          "resources/helpers.js"
         ],
+        [
+         "script",
+         "/storage/buckets/resources/util.js"
+        ],
         [
          "global",
          "window,dedicatedworker,sharedworker,serviceworker"
@@ -737312,6 +737584,13 @@
         ]
        },
        "response_started": {
+        "response_started_cached_tentative.py": [
+         "5022511f792894c6d1be2b72460836747c7181d5",
+         [
+          null,
+          {}
+         ]
+        ],
         "response_started_tentative.py": [
          "b1a0741f202a95eb3544a22e4e08548fdaef2e7d",
          [
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-002.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
index 51432362d66..ee34bc91078 100644
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
+++ b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
@@ -1,3 +1,6 @@
 [block-in-inline-hittest-002.html]
   [elementsFromPoint]
     expected: FAIL
+
+  [elementFromPoint]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini
deleted file mode 100644
index 3e5096beef3..00000000000
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-float-002.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[block-in-inline-hittest-float-002.html]
-  [block-in-inline-hittest-float-002]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini b/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini
new file mode 100644
index 00000000000..b8f8d45a31f
--- /dev/null
+++ b/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini
@@ -0,0 +1,3 @@
+[hittest-anonymous-box.html]
+  [Hit-testing within an anonymous flex-item should return the flexbox as the hittest result.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini b/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
deleted file mode 100644
index 5b685485f3c..00000000000
--- a/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hittest-before-pseudo.html]
-  [Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-ui/appearance-cssom-001.html.ini b/tests/wpt/metadata/css/css-ui/appearance-cssom-001.html.ini
index 5a31ee65da0..51ce991b693 100644
--- a/tests/wpt/metadata/css/css-ui/appearance-cssom-001.html.ini
+++ b/tests/wpt/metadata/css/css-ui/appearance-cssom-001.html.ini
@@ -1084,3 +1084,101 @@
 
   [appearance: square-button (compat)]
     expected: FAIL
+
+
+[appearance-cssom-001.html?exclude=Invalid]
+  [-webkit-appearance: none]
+    expected: FAIL
+
+  [-webkit-appearance: auto]
+    expected: FAIL
+
+  [-webkit-appearance: textfield]
+    expected: FAIL
+
+  [-webkit-appearance: menulist-button]
+    expected: FAIL
+
+  [-webkit-appearance: button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: checkbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: listbox (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: menulist (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: meter (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: radio (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: searchfield (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: textarea (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: push-button (compat)]
+    expected: FAIL
+
+  [-webkit-appearance: square-button (compat)]
+    expected: FAIL
+
+  [appearance: none]
+    expected: FAIL
+
+  [appearance: auto]
+    expected: FAIL
+
+  [appearance: textfield]
+    expected: FAIL
+
+  [appearance: menulist-button]
+    expected: FAIL
+
+  [appearance: button (compat)]
+    expected: FAIL
+
+  [appearance: checkbox (compat)]
+    expected: FAIL
+
+  [appearance: listbox (compat)]
+    expected: FAIL
+
+  [appearance: menulist (compat)]
+    expected: FAIL
+
+  [appearance: meter (compat)]
+    expected: FAIL
+
+  [appearance: progress-bar (compat)]
+    expected: FAIL
+
+  [appearance: radio (compat)]
+    expected: FAIL
+
+  [appearance: searchfield (compat)]
+    expected: FAIL
+
+  [appearance: textarea (compat)]
+    expected: FAIL
+
+  [appearance: slider-horizontal (compat)]
+    expected: FAIL
+
+  [appearance: push-button (compat)]
+    expected: FAIL
+
+  [appearance: square-button (compat)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
new file mode 100644
index 00000000000..f18b8d2fcf9
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
@@ -0,0 +1,3 @@
+[CaretPosition-001.html]
+  [Element at (400, 100)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
new file mode 100644
index 00000000000..72b09371038
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-001.html]
+  [CSSOM View - 5 - extensions to the Document interface]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
index cf67b5d03dd..80ed711305d 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
@@ -1,3 +1,4 @@
 [elementFromPoint-dynamic-anon-box.html]
+  expected: CRASH
   [Link should be clickable after hiding a scrollbox with an anonymous table inside]
     expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini
deleted file mode 100644
index b905fe70fcb..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-ellipsis-in-inline-box.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-ellipsis-in-inline-box.html]
-  [elementFromPoint-ellipsis-in-inline-box]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-relative.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-relative.html.ini
deleted file mode 100644
index 7e9331b6bc2..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-relative.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-float-in-relative.html]
-  [elementFromPoint-float-in-relative]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
index 8ae9bae3500..df64baf81ee 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
@@ -13,3 +13,6 @@
 
   [<li>Outside 3</li>]
     expected: FAIL
+
+  [<li>Image Inside 2</li>]
+    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/fetch/api/basic/keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
index e9ab91fc80e..4c1c78640bb 100644
--- a/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
+++ b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
@@ -1,3 +1,4 @@
 [keepalive.any.html]
+  expected: TIMEOUT
   [keepalive in onunload in nested frame in another window]
     expected: FAIL
diff --git a/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
new file mode 100644
index 00000000000..c57e48f2078
--- /dev/null
+++ b/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
@@ -0,0 +1,2 @@
+[redirect-keepalive.any.html]
+  expected: TIMEOUT
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 ed2ce3392d0..0d48169e3cc 100644
--- a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -147,8 +147,5 @@
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
 
-  [border-image sec-fetch-mode - Not sent to non-trustworthy cross-site destination]
-    expected: FAIL
-
-  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
-    expected: FAIL
+  [background-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
index 6e9f7acf151..c8a3c8f9e68 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/history-traversal/persisted-user-state-restoration/scroll-restoration-fragment-scrolling-cross-origin.html.ini
@@ -1,6 +1,6 @@
 [scroll-restoration-fragment-scrolling-cross-origin.html]
   type: testharness
-  expected: TIMEOUT
+  expected: ERROR
   [Manual scroll restoration should take precedent over scrolling to fragment in cross origin navigation]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/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 149bcb4ff8c..b8fd22e2b81 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
@@ -10,3 +10,6 @@
 
   [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
     expected: FAIL
+
+  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
+    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 5aef7ce66ce..324db3d9b35 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini
@@ -10,6 +10,3 @@
 
   [load event does not fire on window.open('about:blank?foo')]
     expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/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..b169452e04a 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
@@ -10,12 +10,3 @@
 
   [0080 00FF set in href="" targeting a frame and clicked]
     expected: FAIL
-
-  [0080 00FF 0100 set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [D83D DE0D set in href="" targeting a frame and clicked]
-    expected: FAIL
-
-  [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/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/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
deleted file mode 100644
index 60a4fa51f8a..00000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[a-click.html]
-  [aElement.click() before the load event must NOT replace]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
new file mode 100644
index 00000000000..ca84728f1e9
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/the-window-object/open-close/creating_browsing_context_test_01.html.ini
@@ -0,0 +1,4 @@
+[creating_browsing_context_test_01.html]
+  expected: TIMEOUT
+  [first argument: absolute url]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini b/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
deleted file mode 100644
index adaff1bb3fe..00000000000
--- a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini b/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
index 76d431df3a0..bea609ed103 100644
--- a/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
+++ b/tests/wpt/metadata/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini b/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini
deleted file mode 100644
index 844abdcced8..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.image.html]
-  [OffscreenCanvas test: 2d.composite.globalAlpha.image]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini
deleted file mode 100644
index a66bd4c9607..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.image.worker.html]
-  [2d]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini b/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini
deleted file mode 100644
index 5dd24f42848..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.imagepattern.html]
-  [OffscreenCanvas test: 2d.composite.globalAlpha.imagepattern]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini
deleted file mode 100644
index 1718e787f1c..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[2d.composite.globalAlpha.imagepattern.worker.html]
-  [2d]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini
deleted file mode 100644
index f312f1589b8..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.basic.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.basic]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini
deleted file mode 100644
index 2ff0b98dcb5..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.basic.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini
deleted file mode 100644
index 3e8e707a8be..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcepos.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.sourcepos]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini
deleted file mode 100644
index 3ec5cbbadc9..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcepos.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini
deleted file mode 100644
index 44ad1e2efb0..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcesize.html]
-  [OffscreenCanvas test: 2d.drawImage.9arg.sourcesize]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini
deleted file mode 100644
index 150dc88d58e..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.9arg.sourcesize.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini
deleted file mode 100644
index 0b04a0d852d..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.alpha.html]
-  [OffscreenCanvas test: 2d.drawImage.alpha]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini
deleted file mode 100644
index 93ca873d5aa..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.alpha.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
deleted file mode 100644
index dba65871688..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.animated.poster.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
deleted file mode 100644
index 19ec8e5782b..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.animated.poster.worker.html]
-  [drawImage() of an APNG draws the poster frame]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini
deleted file mode 100644
index 38c46fe7e71..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.broken.html]
-  [OffscreenCanvas test: 2d.drawImage.broken]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini
deleted file mode 100644
index b85d2727a7a..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.broken.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini
deleted file mode 100644
index ddc364f4b22..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.clip.html]
-  [OffscreenCanvas test: 2d.drawImage.clip]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini
deleted file mode 100644
index f387c1acd65..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.clip.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini
deleted file mode 100644
index 0d1eb846146..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.composite.html]
-  [OffscreenCanvas test: 2d.drawImage.composite]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini
deleted file mode 100644
index 14975992b26..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.composite.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini
deleted file mode 100644
index e3c09955f13..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.floatsource.html]
-  [OffscreenCanvas test: 2d.drawImage.floatsource]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini
deleted file mode 100644
index 5186c30c1a7..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.floatsource.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini
deleted file mode 100644
index d9c00e020cb..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedest.html]
-  [Negative destination width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini
deleted file mode 100644
index 31b9ec54018..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedest.worker.html]
-  [Negative destination width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini
deleted file mode 100644
index cf30b485857..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedir.html]
-  [Negative dimensions do not affect the direction of the image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini
deleted file mode 100644
index b789fbb639b..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativedir.worker.html]
-  [Negative dimensions do not affect the direction of the image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini
deleted file mode 100644
index fe6fe1317b3..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativesource.html]
-  [Negative source width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini
deleted file mode 100644
index d20b4175b81..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.negativesource.worker.html]
-  [Negative source width/height represents the correct rectangle]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini
deleted file mode 100644
index 968631ac458..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nonfinite.html]
-  [drawImage() with Infinity/NaN is ignored]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini
deleted file mode 100644
index d88e35b08a4..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nonfinite.worker.html]
-  [drawImage() with Infinity/NaN is ignored]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini
deleted file mode 100644
index aac6b35b06d..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nowrap.html]
-  [Stretched images do not get pixels wrapping around the edges]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini
deleted file mode 100644
index 61d2ac9b727..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.nowrap.worker.html]
-  [Stretched images do not get pixels wrapping around the edges]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini
deleted file mode 100644
index 0a613ba46a2..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.path.html]
-  [OffscreenCanvas test: 2d.drawImage.path]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini
deleted file mode 100644
index e3dc6d5ad67..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.path.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
deleted file mode 100644
index adaff1bb3fe..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
deleted file mode 100644
index a97b8b37d07..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.svg.worker.html]
-  [drawImage() of an SVG image]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini
deleted file mode 100644
index 43c1fd403c1..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.transform.html]
-  [OffscreenCanvas test: 2d.drawImage.transform]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini
deleted file mode 100644
index 864d3b3ba40..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[2d.drawImage.transform.worker.html]
-  [2d]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
index efa68741600..d6114b0db21 100644
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
+++ b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.html]
   [drawImage with zero-sized source rectangle throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
index 76d431df3a0..bea609ed103 100644
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
+++ b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
index 6f5d45f8dd9..2e4d62fc879 100644
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
+++ b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.image.worker.html]
   [drawImage with zero-sized source rectangle from image throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle from image draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
index a9d64261e96..a7f8c7ee0ce 100644
--- a/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
+++ b/tests/wpt/metadata/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js.ini
@@ -1,7 +1,3 @@
 [2d.drawImage.zerosource.worker.html]
   [drawImage with zero-sized source rectangle throws INDEX_SIZE_ERR]
     expected: FAIL
-
-  [drawImage with zero-sized source rectangle draws nothing without exception]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
new file mode 100644
index 00000000000..09c049e4b58
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
@@ -0,0 +1,3 @@
+[media_fragment_seek.html]
+  [Video should seek to time specified in media fragment syntax]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index f9138fb999a..6f7461b9472 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/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 31928ad3947..31745fdcdcf 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
@@ -1,5 +1,4 @@
 [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/the-selectmenu-element/selectmenu-value-option.tentative.html.ini b/tests/wpt/metadata/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html.ini
new file mode 100644
index 00000000000..693bd4e2994
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html.ini
@@ -0,0 +1,3 @@
+[selectmenu-value-option.tentative.html]
+  [selectmenu.value should reflect option.value]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/popovers/popover-target-element-disabled.html.ini b/tests/wpt/metadata/html/semantics/popovers/popover-target-element-disabled.html.ini
index a6015cfed6b..0273c7dae9a 100644
--- a/tests/wpt/metadata/html/semantics/popovers/popover-target-element-disabled.html.ini
+++ b/tests/wpt/metadata/html/semantics/popovers/popover-target-element-disabled.html.ini
@@ -16,3 +16,9 @@
 
   [Disconnecting popover*target buttons when popovers are open should close all popovers.]
     expected: FAIL
+
+  [Changing the popovertarget attribute to break the chain should close all popovers.]
+    expected: FAIL
+
+  [Modifying popovertarget on a button which doesn't break the chain shouldn't close any popovers.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
deleted file mode 100644
index 1181798bd79..00000000000
--- a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[async-script.html]
-
-[async-script.html?reload]
-  expected: ERROR
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-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
deleted file mode 100644
index fc0233f5241..00000000000
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
new file mode 100644
index 00000000000..f9a4f08cd70
--- /dev/null
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-tla-delayed.html.ini
@@ -0,0 +1,3 @@
+[module-tla-delayed.html]
+  [document.write in an imported module]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/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 1d71471b73c..4a48dd15a9d 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events.html.ini
@@ -1,7 +1,6 @@
 [promise-rejection-events.html]
-  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
-    expected: TIMEOUT
+    expected: FAIL
 
   [unhandledrejection: from createImageBitmap which is UA triggered]
     expected: FAIL
diff --git a/tests/wpt/metadata/resource-timing/response-status-code.html.ini b/tests/wpt/metadata/resource-timing/response-status-code.html.ini
index b84e3cf7b11..38df5f01300 100644
--- a/tests/wpt/metadata/resource-timing/response-status-code.html.ini
+++ b/tests/wpt/metadata/resource-timing/response-status-code.html.ini
@@ -265,10 +265,10 @@
     expected: FAIL
 
   [This test validates the response status of resources. 88]
-    expected: TIMEOUT
+    expected: FAIL
 
   [This test validates the response status of resources. 89]
-    expected: NOTRUN
+    expected: TIMEOUT
 
   [This test validates the response status of resources. 90]
     expected: NOTRUN
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
index 20a8f9a4320..1f70062991c 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@@ -1,5 +1,4 @@
 [realtimeanalyser-fft-scaling.html]
-  expected: TIMEOUT
   [X 2048-point FFT peak position is not equal to 64. Got 0.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
new file mode 100644
index 00000000000..b7b36c1d3a4
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
@@ -0,0 +1,4 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
new file mode 100644
index 00000000000..80f9a4f15b8
--- /dev/null
+++ b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
@@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
diff --git a/tests/wpt/mozilla/meta/css/stylesheet_media_queries.html.ini b/tests/wpt/mozilla/meta/css/stylesheet_media_queries.html.ini
deleted file mode 100644
index 77ca6b0688d..00000000000
--- a/tests/wpt/mozilla/meta/css/stylesheet_media_queries.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[stylesheet_media_queries.html]
-  [Media queries within stylesheets]
-    expected: FAIL
diff --git a/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini b/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini
new file mode 100644
index 00000000000..6ef3d276974
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/task_queue_throttling.any.js.ini
@@ -0,0 +1,6 @@
+[task_queue_throttling.any.html]
+  [Throttling the performance timeline task queue.]
+    expected: FAIL
+
+
+[task_queue_throttling.any.worker.html]
diff --git a/tests/wpt/web-platform-tests/IndexedDB/storage-buckets.https.any.js b/tests/wpt/web-platform-tests/IndexedDB/storage-buckets.https.any.js
index 24923ffcf8d..4271722a425 100644
--- a/tests/wpt/web-platform-tests/IndexedDB/storage-buckets.https.any.js
+++ b/tests/wpt/web-platform-tests/IndexedDB/storage-buckets.https.any.js
@@ -1,14 +1,12 @@
 // META: title=Buckets API: Tests for indexedDB API.
 // META: global=window,worker
 // META: script=resources/support-promises.js
+// META: script=/storage/buckets/resources/util.js
 
 promise_test(async testCase => {
+  await prepareForBucketTest(testCase);
   const inboxBucket = await navigator.storageBuckets.open('inbox_bucket');
   const outboxBucket = await navigator.storageBuckets.open('outbox_bucket');
-  testCase.add_cleanup(async () => {
-    await navigator.storageBuckets.delete('inbox_bucket');
-    await navigator.storageBuckets.delete('outbox_bucket');
-  });
 
   // Set up similar databases in two buckets.
   const inboxDb = await new Promise((resolve, reject) => {
@@ -77,6 +75,7 @@ promise_test(async testCase => {
 }, 'Basic test that buckets create independent databases.');
 
 promise_test(async testCase => {
+  await prepareForBucketTest(testCase);
   const inboxBucket = await navigator.storageBuckets.open('inbox');
   await navigator.storageBuckets.delete('inbox');
 
diff --git a/tests/wpt/web-platform-tests/annotation-model/tools/make_tests.py b/tests/wpt/web-platform-tests/annotation-model/tools/make_tests.py
index e8bb1aec5a7..6890baa2961 100644
--- a/tests/wpt/web-platform-tests/annotation-model/tools/make_tests.py
+++ b/tests/wpt/web-platform-tests/annotation-model/tools/make_tests.py
@@ -1,8 +1,6 @@
 # This tool creates .html test files for the WPT harness from corresponding .test
 # files that it finds in the tree for this test collection.
 
-from __future__ import print_function
-
 import re
 import time
 import json
diff --git a/tests/wpt/web-platform-tests/annotation-protocol/tools/protocol-server.py b/tests/wpt/web-platform-tests/annotation-protocol/tools/protocol-server.py
index e5d12100017..fc8fa749977 100644
--- a/tests/wpt/web-platform-tests/annotation-protocol/tools/protocol-server.py
+++ b/tests/wpt/web-platform-tests/annotation-protocol/tools/protocol-server.py
@@ -5,8 +5,6 @@
 # Developed by Benjamin Young (@bigbulehat) and Shane McCarron (@halindrome).
 # Sponsored by Spec-Ops (https://spec-ops.io)
 
-from __future__ import print_function
-
 import os
 import sys
 
diff --git a/tests/wpt/web-platform-tests/annotation-vocab/tools/vocab_tester.py b/tests/wpt/web-platform-tests/annotation-vocab/tools/vocab_tester.py
index 7d9cc5b8a2e..86453a7a299 100644
--- a/tests/wpt/web-platform-tests/annotation-vocab/tools/vocab_tester.py
+++ b/tests/wpt/web-platform-tests/annotation-vocab/tools/vocab_tester.py
@@ -3,8 +3,6 @@
 # License: Apache2
 # Last Modified: 2016-09-02
 
-from __future__ import print_function
-
 import json
 from rdflib import ConjunctiveGraph, URIRef
 from pyld import jsonld
diff --git a/tests/wpt/web-platform-tests/common/security-features/tools/generate.py b/tests/wpt/web-platform-tests/common/security-features/tools/generate.py
index 176e0ebbebc..409b4f195ff 100755
--- a/tests/wpt/web-platform-tests/common/security-features/tools/generate.py
+++ b/tests/wpt/web-platform-tests/common/security-features/tools/generate.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python3
 
-from __future__ import print_function
-
 import argparse
 import collections
 import copy
diff --git a/tests/wpt/web-platform-tests/common/security-features/tools/spec_validator.py b/tests/wpt/web-platform-tests/common/security-features/tools/spec_validator.py
index 3ac3f530169..f8a1390ef0d 100755
--- a/tests/wpt/web-platform-tests/common/security-features/tools/spec_validator.py
+++ b/tests/wpt/web-platform-tests/common/security-features/tools/spec_validator.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python3
 
-from __future__ import print_function
-
 import json, sys
 
 
diff --git a/tests/wpt/web-platform-tests/common/security-features/tools/util.py b/tests/wpt/web-platform-tests/common/security-features/tools/util.py
index 72541c78142..5da06f9d51e 100644
--- a/tests/wpt/web-platform-tests/common/security-features/tools/util.py
+++ b/tests/wpt/web-platform-tests/common/security-features/tools/util.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import os, sys, json, json5, re
 import collections
 
diff --git a/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-lr.tentative.html b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-lr.tentative.html
new file mode 100644
index 00000000000..bdac1f40607
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-lr.tentative.html
@@ -0,0 +1,141 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="author" title="Andreu Botella" href="mailto:abotella@igalia.com">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#box-splitting">
+<link rel="help" href="https://www.w3.org/TR/cssom-view/#extensions-to-the-htmlelement-interface">
+<div
+  style="column-width:200px; column-gap: 0; column-fill:auto; width:70px; height:600px; background:yellow; writing-mode: vertical-lr;">
+  <div id="table" style="display:table; border-spacing:7px; border:2px solid; padding:1px;">
+    <div id="colgroup" style="display:table-column-group;">
+      <div id="col" style="display:table-column;"></div>
+      <div id="col2" style="display:table-column;"></div>
+    </div>
+    <div id="colgroup2" style="display:table-column-group;">
+      <div id="col3" style="display:table-column;"></div>
+    </div>
+    <div id="rowgroup" style="display:table-row-group;">
+      <div id="row" style="display:table-row;">
+        <div id="cell" style="display:table-cell;">
+          <div id="content" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+        <div id="cell2" style="display:table-cell;">
+          <div id="content2" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+        <div id="cell3" style="display:table-cell;">
+          <div id="content3" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+      </div>
+      <div id="row2" style="display:table-row;">
+        <div id="cell4" style="display:table-cell;">
+          <div id="content4" style="width:50px; height: 50px; background: blue;"></div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  test(() => {
+    assert_equals(table.offsetTop, 8, "offsetTop");
+    assert_equals(table.offsetLeft, 8, "offsetLeft");
+    assert_equals(table.offsetWidth, 177, "offsetWidth");
+    assert_equals(table.offsetHeight, 184, "offsetHeight");
+  }, "table");
+  test(() => {
+    assert_equals(colgroup.offsetTop, 18, "offsetTop");
+    assert_equals(colgroup.offsetLeft, 18, "offsetLeft");
+    assert_equals(colgroup.offsetWidth, 157, "offsetWidth");
+    assert_equals(colgroup.offsetHeight, 107, "offsetHeight");
+  }, "colgroup");
+  test(() => {
+    assert_equals(col.offsetTop, 18, "offsetTop");
+    assert_equals(col.offsetLeft, 18, "offsetLeft");
+    assert_equals(col.offsetWidth, 157, "offsetWidth");
+    assert_equals(col.offsetHeight, 50, "offsetHeight");
+  }, "col");
+  test(() => {
+    assert_equals(col2.offsetTop, 75, "offsetTop");
+    assert_equals(col2.offsetLeft, 18, "offsetLeft");
+    assert_equals(col2.offsetWidth, 157, "offsetWidth");
+    assert_equals(col2.offsetHeight, 50, "offsetHeight");
+  }, "col2");
+  test(() => {
+    assert_equals(colgroup2.offsetTop, 132, "offsetTop");
+    assert_equals(colgroup2.offsetLeft, 18, "offsetLeft");
+    assert_equals(colgroup2.offsetWidth, 157, "offsetWidth");
+    assert_equals(colgroup2.offsetHeight, 50, "offsetHeight");
+  }, "colgroup2");
+  test(() => {
+    assert_equals(col3.offsetTop, 132, "offsetTop");
+    assert_equals(col3.offsetLeft, 18, "offsetLeft");
+    assert_equals(col3.offsetWidth, 157, "offsetWidth");
+    assert_equals(col3.offsetHeight, 50, "offsetHeight");
+  }, "col3");
+  test(() => {
+    assert_equals(rowgroup.offsetTop, 18, "offsetTop");
+    assert_equals(rowgroup.offsetLeft, 18, "offsetLeft");
+    assert_equals(rowgroup.offsetWidth, 157, "offsetWidth");
+    assert_equals(rowgroup.offsetHeight, 164, "offsetHeight");
+  }, "rowgroup");
+  test(() => {
+    assert_equals(row.offsetTop, 18, "offsetTop");
+    assert_equals(row.offsetLeft, 18, "offsetLeft");
+    assert_equals(row.offsetWidth, 100, "offsetWidth");
+    assert_equals(row.offsetHeight, 164, "offsetHeight");
+  }, "row");
+  test(() => {
+    assert_equals(cell.offsetTop, 18, "offsetTop");
+    assert_equals(cell.offsetLeft, 18, "offsetLeft");
+    assert_equals(cell.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell.offsetHeight, 50, "offsetHeight");
+  }, "cell");
+  test(() => {
+    assert_equals(content.offsetTop, 18, "offsetTop");
+    assert_equals(content.offsetLeft, 18, "offsetLeft");
+    assert_equals(content.offsetWidth, 100, "offsetWidth");
+    assert_equals(content.offsetHeight, 50, "offsetHeight");
+  }, "content");
+  test(() => {
+    assert_equals(cell2.offsetTop, 75, "offsetTop");
+    assert_equals(cell2.offsetLeft, 18, "offsetLeft");
+    assert_equals(cell2.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell2.offsetHeight, 50, "offsetHeight");
+  }, "cell2");
+  test(() => {
+    assert_equals(content2.offsetTop, 75, "offsetTop");
+    assert_equals(content2.offsetLeft, 18, "offsetLeft");
+    assert_equals(content2.offsetWidth, 100, "offsetWidth");
+    assert_equals(content2.offsetHeight, 50, "offsetHeight");
+  }, "content2");
+  test(() => {
+    assert_equals(cell3.offsetTop, 132, "offsetTop");
+    assert_equals(cell3.offsetLeft, 18, "offsetLeft");
+    assert_equals(cell3.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell3.offsetHeight, 50, "offsetHeight");
+  }, "cell3");
+  test(() => {
+    assert_equals(content3.offsetTop, 132, "offsetTop");
+    assert_equals(content3.offsetLeft, 18, "offsetLeft");
+    assert_equals(content3.offsetWidth, 100, "offsetWidth");
+    assert_equals(content3.offsetHeight, 50, "offsetHeight");
+  }, "content3");
+  test(() => {
+    assert_equals(row2.offsetTop, 218, "offsetTop");
+    assert_equals(row2.offsetLeft, 55, "offsetLeft");
+    assert_equals(row2.offsetWidth, 50, "offsetWidth");
+    assert_equals(row2.offsetHeight, 164, "offsetHeight");
+  }, "row2");
+  test(() => {
+    assert_equals(cell4.offsetTop, 218, "offsetTop");
+    assert_equals(cell4.offsetLeft, 55, "offsetLeft");
+    assert_equals(cell4.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell4.offsetHeight, 50, "offsetHeight");
+  }, "cell4");
+  test(() => {
+    assert_equals(content4.offsetTop, 218, "offsetTop");
+    assert_equals(content4.offsetLeft, 55, "offsetLeft");
+    assert_equals(content4.offsetWidth, 50, "offsetWidth");
+    assert_equals(content4.offsetHeight, 50, "offsetHeight");
+  }, "content4");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-rl.tentative.html b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-rl.tentative.html
new file mode 100644
index 00000000000..9d4a472d438
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets-vertical-rl.tentative.html
@@ -0,0 +1,141 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="author" title="Andreu Botella" href="mailto:abotella@igalia.com">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#box-splitting">
+<link rel="help" href="https://www.w3.org/TR/cssom-view/#extensions-to-the-htmlelement-interface">
+<div
+  style="column-width:200px; column-gap: 0; column-fill:auto; width:70px; height:600px; background:yellow; writing-mode: vertical-rl;">
+  <div id="table" style="display:table; border-spacing:7px; border:2px solid; padding:1px;">
+    <div id="colgroup" style="display:table-column-group;">
+      <div id="col" style="display:table-column;"></div>
+      <div id="col2" style="display:table-column;"></div>
+    </div>
+    <div id="colgroup2" style="display:table-column-group;">
+      <div id="col3" style="display:table-column;"></div>
+    </div>
+    <div id="rowgroup" style="display:table-row-group;">
+      <div id="row" style="display:table-row;">
+        <div id="cell" style="display:table-cell;">
+          <div id="content" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+        <div id="cell2" style="display:table-cell;">
+          <div id="content2" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+        <div id="cell3" style="display:table-cell;">
+          <div id="content3" style="width:100px; height:50px; background:blue;"></div>
+        </div>
+      </div>
+      <div id="row2" style="display:table-row;">
+        <div id="cell4" style="display:table-cell;">
+          <div id="content4" style="width:50px; height: 50px; background: blue;"></div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  test(() => {
+    assert_equals(table.offsetTop, 408, "offsetTop");
+    assert_equals(table.offsetLeft, 41, "offsetLeft");
+    assert_equals(table.offsetWidth, 177, "offsetWidth");
+    assert_equals(table.offsetHeight, 184, "offsetHeight");
+  }, "table");
+  test(() => {
+    assert_equals(colgroup.offsetTop, 418, "offsetTop");
+    assert_equals(colgroup.offsetLeft, 51, "offsetLeft");
+    assert_equals(colgroup.offsetWidth, 157, "offsetWidth");
+    assert_equals(colgroup.offsetHeight, 107, "offsetHeight");
+  }, "colgroup");
+  test(() => {
+    assert_equals(col.offsetTop, 418, "offsetTop");
+    assert_equals(col.offsetLeft, 51, "offsetLeft");
+    assert_equals(col.offsetWidth, 157, "offsetWidth");
+    assert_equals(col.offsetHeight, 50, "offsetHeight");
+  }, "col");
+  test(() => {
+    assert_equals(col2.offsetTop, 475, "offsetTop");
+    assert_equals(col2.offsetLeft, 51, "offsetLeft");
+    assert_equals(col2.offsetWidth, 157, "offsetWidth");
+    assert_equals(col2.offsetHeight, 50, "offsetHeight");
+  }, "col2");
+  test(() => {
+    assert_equals(colgroup2.offsetTop, 532, "offsetTop");
+    assert_equals(colgroup2.offsetLeft, 51, "offsetLeft");
+    assert_equals(colgroup2.offsetWidth, 157, "offsetWidth");
+    assert_equals(colgroup2.offsetHeight, 50, "offsetHeight");
+  }, "colgroup2");
+  test(() => {
+    assert_equals(col3.offsetTop, 532, "offsetTop");
+    assert_equals(col3.offsetLeft, 51, "offsetLeft");
+    assert_equals(col3.offsetWidth, 157, "offsetWidth");
+    assert_equals(col3.offsetHeight, 50, "offsetHeight");
+  }, "col3");
+  test(() => {
+    assert_equals(rowgroup.offsetTop, 418, "offsetTop");
+    assert_equals(rowgroup.offsetLeft, 51, "offsetLeft");
+    assert_equals(rowgroup.offsetWidth, 157, "offsetWidth");
+    assert_equals(rowgroup.offsetHeight, 164, "offsetHeight");
+  }, "rowgroup");
+  test(() => {
+    assert_equals(row.offsetTop, 218, "offsetTop");
+    assert_equals(row.offsetLeft, 38, "offsetLeft");
+    assert_equals(row.offsetWidth, 100, "offsetWidth");
+    assert_equals(row.offsetHeight, 164, "offsetHeight");
+  }, "row");
+  test(() => {
+    assert_equals(cell.offsetTop, 218, "offsetTop");
+    assert_equals(cell.offsetLeft, 38, "offsetLeft");
+    assert_equals(cell.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell.offsetHeight, 50, "offsetHeight");
+  }, "cell");
+  test(() => {
+    assert_equals(content.offsetTop, 218, "offsetTop");
+    assert_equals(content.offsetLeft, 38, "offsetLeft");
+    assert_equals(content.offsetWidth, 100, "offsetWidth");
+    assert_equals(content.offsetHeight, 50, "offsetHeight");
+  }, "content");
+  test(() => {
+    assert_equals(cell2.offsetTop, 275, "offsetTop");
+    assert_equals(cell2.offsetLeft, 38, "offsetLeft");
+    assert_equals(cell2.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell2.offsetHeight, 50, "offsetHeight");
+  }, "cell2");
+  test(() => {
+    assert_equals(content2.offsetTop, 275, "offsetTop");
+    assert_equals(content2.offsetLeft, 38, "offsetLeft");
+    assert_equals(content2.offsetWidth, 100, "offsetWidth");
+    assert_equals(content2.offsetHeight, 50, "offsetHeight");
+  }, "content2");
+  test(() => {
+    assert_equals(cell3.offsetTop, 332, "offsetTop");
+    assert_equals(cell3.offsetLeft, 38, "offsetLeft");
+    assert_equals(cell3.offsetWidth, 100, "offsetWidth");
+    assert_equals(cell3.offsetHeight, 50, "offsetHeight");
+  }, "cell3");
+  test(() => {
+    assert_equals(content3.offsetTop, 332, "offsetTop");
+    assert_equals(content3.offsetLeft, 38, "offsetLeft");
+    assert_equals(content3.offsetWidth, 100, "offsetWidth");
+    assert_equals(content3.offsetHeight, 50, "offsetHeight");
+  }, "content3");
+  test(() => {
+    assert_equals(row2.offsetTop, 418, "offsetTop");
+    assert_equals(row2.offsetLeft, 51, "offsetLeft");
+    assert_equals(row2.offsetWidth, 50, "offsetWidth");
+    assert_equals(row2.offsetHeight, 164, "offsetHeight");
+  }, "row2");
+  test(() => {
+    assert_equals(cell4.offsetTop, 418, "offsetTop");
+    assert_equals(cell4.offsetLeft, 51, "offsetLeft");
+    assert_equals(cell4.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell4.offsetHeight, 50, "offsetHeight");
+  }, "cell4");
+  test(() => {
+    assert_equals(content4.offsetTop, 418, "offsetTop");
+    assert_equals(content4.offsetLeft, 51, "offsetLeft");
+    assert_equals(content4.offsetWidth, 50, "offsetWidth");
+    assert_equals(content4.offsetHeight, 50, "offsetHeight");
+  }, "content4");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets.tentative.html b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets.tentative.html
new file mode 100644
index 00000000000..265d761ffb3
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/table/table-parts-offsets.tentative.html
@@ -0,0 +1,140 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="author" title="Andreu Botella" href="mailto:abotella@igalia.com">
+<link rel="help" href="https://www.w3.org/TR/css-break-3/#box-splitting">
+<link rel="help" href="https://www.w3.org/TR/cssom-view/#extensions-to-the-htmlelement-interface">
+<div style="column-width:200px; column-gap: 0; column-fill:auto; height:70px; width:600px; background:yellow;">
+  <div id="table" style="display:table; border-spacing:7px; border:2px solid; padding:1px;">
+    <div id="colgroup" style="display:table-column-group;">
+      <div id="col" style="display:table-column;"></div>
+      <div id="col2" style="display:table-column;"></div>
+    </div>
+    <div id="colgroup2" style="display:table-column-group;">
+      <div id="col3" style="display:table-column;"></div>
+    </div>
+    <div id="rowgroup" style="display:table-row-group;">
+      <div id="row" style="display:table-row;">
+        <div id="cell" style="display:table-cell;">
+          <div id="content" style="width:50px; height:100px; background:blue;"></div>
+        </div>
+        <div id="cell2" style="display:table-cell;">
+          <div id="content2" style="width:50px; height:100px; background:blue;"></div>
+        </div>
+        <div id="cell3" style="display:table-cell;">
+          <div id="content3" style="width:50px; height:100px; background:blue;"></div>
+        </div>
+      </div>
+      <div id="row2" style="display:table-row;">
+        <div id="cell4" style="display:table-cell;">
+          <div id="content4" style="width:50px; height: 50px; background: blue;"></div>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  test(() => {
+    assert_equals(table.offsetTop, 8, "offsetTop");
+    assert_equals(table.offsetLeft, 8, "offsetLeft");
+    assert_equals(table.offsetWidth, 184, "offsetWidth");
+    assert_equals(table.offsetHeight, 177, "offsetHeight");
+  }, "table");
+  test(() => {
+    assert_equals(colgroup.offsetTop, 18, "offsetTop");
+    assert_equals(colgroup.offsetLeft, 18, "offsetLeft");
+    assert_equals(colgroup.offsetWidth, 107, "offsetWidth");
+    assert_equals(colgroup.offsetHeight, 157, "offsetHeight");
+  }, "colgroup");
+  test(() => {
+    assert_equals(col.offsetTop, 18, "offsetTop");
+    assert_equals(col.offsetLeft, 18, "offsetLeft");
+    assert_equals(col.offsetWidth, 50, "offsetWidth");
+    assert_equals(col.offsetHeight, 157, "offsetHeight");
+  }, "col");
+  test(() => {
+    assert_equals(col2.offsetTop, 18, "offsetTop");
+    assert_equals(col2.offsetLeft, 75, "offsetLeft");
+    assert_equals(col2.offsetWidth, 50, "offsetWidth");
+    assert_equals(col2.offsetHeight, 157, "offsetHeight");
+  }, "col2");
+  test(() => {
+    assert_equals(colgroup2.offsetTop, 18, "offsetTop");
+    assert_equals(colgroup2.offsetLeft, 132, "offsetLeft");
+    assert_equals(colgroup2.offsetWidth, 50, "offsetWidth");
+    assert_equals(colgroup2.offsetHeight, 157, "offsetHeight");
+  }, "colgroup2");
+  test(() => {
+    assert_equals(col3.offsetTop, 18, "offsetTop");
+    assert_equals(col3.offsetLeft, 132, "offsetLeft");
+    assert_equals(col3.offsetWidth, 50, "offsetWidth");
+    assert_equals(col3.offsetHeight, 157, "offsetHeight");
+  }, "col3");
+  test(() => {
+    assert_equals(rowgroup.offsetTop, 18, "offsetTop");
+    assert_equals(rowgroup.offsetLeft, 18, "offsetLeft");
+    assert_equals(rowgroup.offsetWidth, 164, "offsetWidth");
+    assert_equals(rowgroup.offsetHeight, 157, "offsetHeight");
+  }, "rowgroup");
+  test(() => {
+    assert_equals(row.offsetTop, 18, "offsetTop");
+    assert_equals(row.offsetLeft, 18, "offsetLeft");
+    assert_equals(row.offsetWidth, 164, "offsetWidth");
+    assert_equals(row.offsetHeight, 100, "offsetHeight");
+  }, "row");
+  test(() => {
+    assert_equals(cell.offsetTop, 18, "offsetTop");
+    assert_equals(cell.offsetLeft, 18, "offsetLeft");
+    assert_equals(cell.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell.offsetHeight, 100, "offsetHeight");
+  }, "cell");
+  test(() => {
+    assert_equals(content.offsetTop, 18, "offsetTop");
+    assert_equals(content.offsetLeft, 18, "offsetLeft");
+    assert_equals(content.offsetWidth, 50, "offsetWidth");
+    assert_equals(content.offsetHeight, 100, "offsetHeight");
+  }, "content");
+  test(() => {
+    assert_equals(cell2.offsetTop, 18, "offsetTop");
+    assert_equals(cell2.offsetLeft, 75, "offsetLeft");
+    assert_equals(cell2.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell2.offsetHeight, 100, "offsetHeight");
+  }, "cell2");
+  test(() => {
+    assert_equals(content2.offsetTop, 18, "offsetTop");
+    assert_equals(content2.offsetLeft, 75, "offsetLeft");
+    assert_equals(content2.offsetWidth, 50, "offsetWidth");
+    assert_equals(content2.offsetHeight, 100, "offsetHeight");
+  }, "content2");
+  test(() => {
+    assert_equals(cell3.offsetTop, 18, "offsetTop");
+    assert_equals(cell3.offsetLeft, 132, "offsetLeft");
+    assert_equals(cell3.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell3.offsetHeight, 100, "offsetHeight");
+  }, "cell3");
+  test(() => {
+    assert_equals(content3.offsetTop, 18, "offsetTop");
+    assert_equals(content3.offsetLeft, 132, "offsetLeft");
+    assert_equals(content3.offsetWidth, 50, "offsetWidth");
+    assert_equals(content3.offsetHeight, 100, "offsetHeight");
+  }, "content3");
+  test(() => {
+    assert_equals(row2.offsetTop, 55, "offsetTop");
+    assert_equals(row2.offsetLeft, 218, "offsetLeft");
+    assert_equals(row2.offsetWidth, 164, "offsetWidth");
+    assert_equals(row2.offsetHeight, 50, "offsetHeight");
+  }, "row2");
+  test(() => {
+    assert_equals(cell4.offsetTop, 55, "offsetTop");
+    assert_equals(cell4.offsetLeft, 218, "offsetLeft");
+    assert_equals(cell4.offsetWidth, 50, "offsetWidth");
+    assert_equals(cell4.offsetHeight, 50, "offsetHeight");
+  }, "cell4");
+  test(() => {
+    assert_equals(content4.offsetTop, 55, "offsetTop");
+    assert_equals(content4.offsetLeft, 218, "offsetLeft");
+    assert_equals(content4.offsetWidth, 50, "offsetWidth");
+    assert_equals(content4.offsetHeight, 50, "offsetHeight");
+  }, "content4");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-fonts/support/fonts/makegsubfonts.py b/tests/wpt/web-platform-tests/css/css-fonts/support/fonts/makegsubfonts.py
index e519b4936de..b46fa0e632b 100644
--- a/tests/wpt/web-platform-tests/css/css-fonts/support/fonts/makegsubfonts.py
+++ b/tests/wpt/web-platform-tests/css/css-fonts/support/fonts/makegsubfonts.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import os
 import textwrap
 from xml.etree import ElementTree
diff --git a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-line-height-tests.py b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-line-height-tests.py
index 12fb6a3ad85..e2a4457f38e 100644
--- a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-line-height-tests.py
+++ b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-line-height-tests.py
@@ -8,8 +8,6 @@ script outputs a list of all tests it generated in the format of Mozilla
 reftest.list to the stdout.
 """
 
-from __future__ import unicode_literals, print_function, absolute_import
-
 TEST_FILE = 'text-emphasis-line-height-{:03}{}.html'
 TEST_TEMPLATE = '''<!DOCTYPE html>
 <meta charset="utf-8">
diff --git a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-position-property-tests.py b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-position-property-tests.py
index 52795906876..f2baf023325 100644
--- a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-position-property-tests.py
+++ b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-position-property-tests.py
@@ -9,8 +9,6 @@ test files are generated by this script. It also outputs a list of all
 tests it generated in the format of Mozilla reftest.list to the stdout.
 """
 
-from __future__ import unicode_literals, print_function, absolute_import
-
 import itertools
 
 TEST_FILE = 'text-emphasis-position-property-{:03}{}.html'
diff --git a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-ruby-tests.py b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-ruby-tests.py
index fdbaec052e4..f1158f5f843 100644
--- a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-ruby-tests.py
+++ b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-ruby-tests.py
@@ -7,8 +7,6 @@ emphasis marks with ruby in four directions. It outputs a list of all
 tests it generated in the format of Mozilla reftest.list to the stdout.
 """
 
-from __future__ import unicode_literals, print_function, absolute_import
-
 TEST_FILE = 'text-emphasis-ruby-{:03}{}.html'
 TEST_TEMPLATE = '''<!DOCTYPE html>
 <meta charset="utf-8">
diff --git a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-style-property-tests.py b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-style-property-tests.py
index 1b1d6fc16f2..b6ad1f7291b 100644
--- a/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-style-property-tests.py
+++ b/tests/wpt/web-platform-tests/css/css-text-decor/tools/generate-text-emphasis-style-property-tests.py
@@ -8,8 +8,6 @@ and <string>, with horizontal writing mode. It outputs a list of all
 tests it generated in the format of Mozilla reftest.list to the stdout.
 """
 
-from __future__ import unicode_literals, print_function, absolute_import
-
 TEST_FILE = 'text-emphasis-style-property-{:03}{}.html'
 TEST_TEMPLATE = '''<!DOCTYPE html>
 <meta charset="utf-8">
diff --git a/tests/wpt/web-platform-tests/css/css-text/line-breaking/tools/generate-segment-break-transformation-rules-tests.py b/tests/wpt/web-platform-tests/css/css-text/line-breaking/tools/generate-segment-break-transformation-rules-tests.py
index fc894161bda..6689ef5f182 100644
--- a/tests/wpt/web-platform-tests/css/css-text/line-breaking/tools/generate-segment-break-transformation-rules-tests.py
+++ b/tests/wpt/web-platform-tests/css/css-text/line-breaking/tools/generate-segment-break-transformation-rules-tests.py
@@ -18,8 +18,6 @@ So there are 49 different combinations. It outputs a list of all
 tests it generated in the format of Mozilla reftest.list to the stdout.
 """
 
-from __future__ import unicode_literals, print_function, absolute_import
-
 TEST_FILE = 'segment-break-transformation-rules-{:03}.html'
 TEST_TEMPLATE = '''<!DOCTYPE html>
 <meta charset="utf-8">
diff --git a/tests/wpt/web-platform-tests/css/css-transitions/all-with-discrete.tentative.html b/tests/wpt/web-platform-tests/css/css-transitions/all-with-discrete.tentative.html
index f12c14e4c55..a048bc7a1cc 100644
--- a/tests/wpt/web-platform-tests/css/css-transitions/all-with-discrete.tentative.html
+++ b/tests/wpt/web-platform-tests/css/css-transitions/all-with-discrete.tentative.html
@@ -3,6 +3,7 @@
 <link rel=help href="https://github.com/w3c/csswg-drafts/issues/4441">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="/css/css-animations/support/testcommon.js"></script>
 
 <div id=target1 class=target>hello</div>
 <div id=target2 class=target>hello</div>
@@ -32,9 +33,9 @@ promise_test(async () => {
   target1.addEventListener('transitionstart', () => {
     transitionstartFired = true;
   });
-  await new Promise(resolve => requestAnimationFrame(resolve));
+  await waitForAnimationFrames(2);
   target1.classList.add('animated');
-  await new Promise(resolve => requestAnimationFrame(resolve));
+  await waitForAnimationFrames(1);
   assert_true(transitionstartFired);
 }, 'all with an explicit discrete property should animate.');
 
@@ -43,9 +44,9 @@ promise_test(async () => {
   target2.addEventListener('transitionstart', () => {
     transitionstartFired = true;
   });
-  await new Promise(resolve => requestAnimationFrame(resolve));
+  await waitForAnimationFrames(2);
   target2.classList.add('animated');
-  await new Promise(resolve => requestAnimationFrame(resolve));
+  await waitForAnimationFrames(1);
   assert_false(transitionstartFired);
 }, 'all without an explicit discrete property should not animate.');
 </script>
diff --git a/tests/wpt/web-platform-tests/css/css-ui/appearance-cssom-001.html b/tests/wpt/web-platform-tests/css/css-ui/appearance-cssom-001.html
index 1618c2b8a28..2da20a0ac92 100644
--- a/tests/wpt/web-platform-tests/css/css-ui/appearance-cssom-001.html
+++ b/tests/wpt/web-platform-tests/css/css-ui/appearance-cssom-001.html
@@ -2,8 +2,11 @@
 <title>CSS Basic User Interface Test: appearance CSSOM</title>
 <link rel="help" href="https://drafts.csswg.org/css-ui-4/#appearance-switching">
 <meta name="assert" content="CSSOM for the appearance/-webkit-appearance property is correct.">
+<meta name="variant" content="">
+<meta name="variant" content="?exclude=Invalid">
 <script src=/resources/testharness.js></script>
 <script src=/resources/testharnessreport.js></script>
+<script src="/common/subset-tests-by-key.js"></script>
 <button id=button>Test</button>
 <script>
   const button = document.getElementById('button');
@@ -191,7 +194,7 @@
   }
   for (const prop of ["-webkit-appearance", "appearance"]) {
     for (const value of values) {
-      test(() => {
+      subsetTestByKey(`Values`, test, () => {
         button.removeAttribute('style');
         button.style.setProperty(prop, value);
         assert_style_for_prop(button.style, prop, value);
@@ -204,7 +207,7 @@
     }
 
     for (const value of compat_values) {
-      test(() => {
+      subsetTestByKey(`Compat`, test, () => {
         button.removeAttribute('style');
         button.style.setProperty(prop, value);
         assert_style_for_prop(button.style, prop, [value, ""]);
@@ -217,7 +220,7 @@
     }
 
     for (const value of invalid_values) {
-      test(() => {
+      subsetTestByKey(`Invalid`, test, () => {
         button.removeAttribute('style');
         button.style.setProperty(prop, value);
         assert_style_for_prop(button.style, prop, "");
@@ -245,7 +248,7 @@
     "-tc-",
   ]) {
     const prop = `${prefix}appearance`;
-    test(() => {
+    subsetTestByKey(`Prefixes`, test, () => {
       button.removeAttribute('style');
       button.style.setProperty(prop, 'none');
       assert_equals(button.style.getPropertyValue(prop), '');
diff --git a/tests/wpt/web-platform-tests/docs/requirements.txt b/tests/wpt/web-platform-tests/docs/requirements.txt
index 0ad8484f60b..589a98eaa2a 100644
--- a/tests/wpt/web-platform-tests/docs/requirements.txt
+++ b/tests/wpt/web-platform-tests/docs/requirements.txt
@@ -1,5 +1,5 @@
 recommonmark==0.7.1
-sphinx-argparse==0.3.1
+sphinx-argparse==0.3.2
 sphinx-autobuild==2021.3.14
 sphinx-js==3.2.1
 sphinx==4.4.0
diff --git a/tests/wpt/web-platform-tests/dom/events/scrolling/scroll_support.js b/tests/wpt/web-platform-tests/dom/events/scrolling/scroll_support.js
index 74b531cd3df..f561b699534 100644
--- a/tests/wpt/web-platform-tests/dom/events/scrolling/scroll_support.js
+++ b/tests/wpt/web-platform-tests/dom/events/scrolling/scroll_support.js
@@ -42,8 +42,8 @@ async function verifyScrollStopped(test, target_div) {
   const y = target_div.scrollTop;
   return new Promise(resolve => {
     test.step_timeout(() => {
-      assert_equals(x, target_div.scrollLeft);
-      assert_equals(y, target_div.scrollTop);
+      assert_equals(target_div.scrollLeft, x);
+      assert_equals(target_div.scrollTop, y);
       resolve();
     }, unscaled_pause_time_in_ms);
   });
diff --git a/tests/wpt/web-platform-tests/dom/nodes/Document-createElement-namespace-tests/generate.py b/tests/wpt/web-platform-tests/dom/nodes/Document-createElement-namespace-tests/generate.py
index a0bca546c75..20c866bee80 100755
--- a/tests/wpt/web-platform-tests/dom/nodes/Document-createElement-namespace-tests/generate.py
+++ b/tests/wpt/web-platform-tests/dom/nodes/Document-createElement-namespace-tests/generate.py
@@ -1,7 +1,5 @@
 #!/usr/bin/python
 
-from __future__ import print_function
-
 import os
 import sys
 
diff --git a/tests/wpt/web-platform-tests/encrypted-media/polyfill/make-polyfill-tests.py b/tests/wpt/web-platform-tests/encrypted-media/polyfill/make-polyfill-tests.py
index 532037e2a33..97c6fc74e93 100644
--- a/tests/wpt/web-platform-tests/encrypted-media/polyfill/make-polyfill-tests.py
+++ b/tests/wpt/web-platform-tests/encrypted-media/polyfill/make-polyfill-tests.py
@@ -1,7 +1,5 @@
 #!/usr/bin/python
 
-from __future__ import print_function
-
 import os, re, os.path, glob
 
 head = re.compile( r"^(\s*</head>)", re.MULTILINE )
diff --git a/tests/wpt/web-platform-tests/fetch/local-network-access/redirect.https.window.js b/tests/wpt/web-platform-tests/fetch/local-network-access/redirect.https.window.js
index f8a53ad1889..edbd5a19fbc 100644
--- a/tests/wpt/web-platform-tests/fetch/local-network-access/redirect.https.window.js
+++ b/tests/wpt/web-platform-tests/fetch/local-network-access/redirect.https.window.js
@@ -365,8 +365,8 @@ promise_test(t => fetchTest(t, {
     server: Server.HTTPS_LOCAL,
     treatAsPublic: true,
   },
-  server: Server.HTTPS_PRIVATE,
   target: {
+    server: Server.HTTPS_PRIVATE,
     behavior: {
       preflight: PreflightBehavior.noPnaHeader(token()),
       response: ResponseBehavior.allowCrossOrigin(),
diff --git a/tests/wpt/web-platform-tests/fetch/local-network-access/resources/support.sub.js b/tests/wpt/web-platform-tests/fetch/local-network-access/resources/support.sub.js
index c07fd2c2ace..0cf3d2532e7 100644
--- a/tests/wpt/web-platform-tests/fetch/local-network-access/resources/support.sub.js
+++ b/tests/wpt/web-platform-tests/fetch/local-network-access/resources/support.sub.js
@@ -205,6 +205,7 @@ function sourceResolveOptions({ server, treatAsPublic }) {
 //   - `response`: The result of calling one of `ResponseBehavior`'s methods.
 //   - `redirect`: A URL to which the target should redirect GET requests.
 function preflightUrl({ server, behavior }) {
+  assert_not_equals(server, undefined, 'server');
   const options = {...server};
   if (behavior) {
     const { preflight, response, redirect } = behavior;
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/TODO b/tests/wpt/web-platform-tests/fledge/tentative/TODO
new file mode 100644
index 00000000000..839d286b388
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/TODO
@@ -0,0 +1,33 @@
+Need tests for (likely not a complete list):
+
+* directFromSellerSignals.
+* All generateBid() and scoreAd() input parameters.
+* All interest group fields (passed to auction, have effect on auction).
+    Validation when joining/leaving interest group is covered.
+* Updates.
+* All auctionConfig parameters (including invalid auctionConfigs, and ones
+    with no buyers).
+* Interest group expiration.
+* Multiple buyers.
+* Multiple interest group with same owner.
+* Multiple origin auctions (buyer != publisher != seller).
+* Multiple frame tests (including join IG policy, run auction policy,
+    loading URNs in fencedframes in other frames, loading component
+    ad URNs in fenced frames of other frames, etc)
+* adAuctionConfig passed to reportResult().
+* trusted bidding / scoring signals.
+* Component ads.
+* Component auctions.
+* In reporting methods, browserSignals fields: dataVersion, topLevelSeller,
+    componentSeller, modifiedBid, adCost, madeHighestScoringOtherBid
+    (with interest group from another origin).
+* Loading ads in iframes.
+* In fencedframes window.fence.setReportEventDataForAutomaticBeacons()
+* Calling leaveAdInterestGroup() in the frame of a winning ad (and one
+    of its component ads)
+* Network errors / timeouts.
+
+If possible:
+* Aggregate reporting.
+* Join/leave permission delegation via .well-known files.
+* k-anonymity.
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js b/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js
new file mode 100644
index 00000000000..e967d92618c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js
@@ -0,0 +1,542 @@
+// META: script=/resources/testdriver.js
+// META: script=/common/utils.js
+// META: script=resources/fledge-util.js
+
+// These tests are focused on joinAdInterestGroup() and leaveAdInterestGroup().
+// Most join tests do not run auctions, but instead only check the result of
+// the returned promise, since testing that interest groups are actually
+// joined, and that each interestGroup field behaves as intended, are covered
+// by other tests.
+
+// Minimal fields needed for a valid interest group. Used in most test cases.
+const BASE_INTEREST_GROUP = {
+  owner: window.location.origin,
+  name: 'default name',
+}
+
+// Each test case attempts to join and then leave an interest group, checking
+// if any exceptions are thrown from either operation.
+const SIMPLE_JOIN_LEAVE_TEST_CASES = [
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: null
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: {}
+  },
+
+  // Basic success test case.
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: BASE_INTEREST_GROUP
+  },
+
+  // "owner" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { name: 'default name' }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     owner: null}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     owner: window.location.origin.replace('https', 'http')}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     owner: window.location.origin.replace('https', 'wss')}
+  },
+  // Cross-origin joins and leaves are not allowed without .well-known
+  // permissions.
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     owner: '{{hosts[][www]}}' }
+  },
+
+  // "name" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: false,
+    interestGroup: { owner: window.location.origin }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     name: ''}
+  },
+
+  // "priority" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priority: 1}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priority: 0}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priority: -1.5}
+  },
+
+  // "priorityVector" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: null}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: 1}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: {a: 'apple'}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: {}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: {a: 1}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     priorityVector: {'a': 1, 'b': -4.5, 'a.b': 0}}
+  },
+
+  // "prioritySignalsOverrides" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: null}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: 1}
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: {a: 'apple'}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: {}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: {a: 1}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     prioritySignalsOverrides: {'a': 1, 'b': -4.5, 'a.b': 0}}
+  },
+
+  // "enableBiddingSignalsPrioritization" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     enableBiddingSignalsPrioritization: true}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     enableBiddingSignalsPrioritization: false}
+  },
+
+  // "biddingLogicUrl" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingLogicUrl: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingLogicUrl: 'https://{{hosts[][www]}}/foo.js' }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingLogicUrl: 'data:text/javascript,Foo' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingLogicUrl: `${window.location.origin}/foo.js`}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingLogicUrl: 'relative/path' }
+  },
+
+  // "biddingWasmHelperUrl" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingWasmHelperUrl: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingWasmHelperUrl: 'https://{{hosts[][www]}}/foo.js' }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingWasmHelperUrl: 'data:application/wasm,Foo' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingWasmHelperUrl: `${window.location.origin}/foo.js`}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     biddingWasmHelperUrl: 'relative/path' }
+  },
+
+  // "dailyUpdateUrl" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     dailyUpdateUrl: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     dailyUpdateUrl: 'https://{{hosts[][www]}}/foo.js' }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     dailyUpdateUrl: 'data:application/wasm,Foo' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     dailyUpdateUrl: `${window.location.origin}/foo.js`}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     dailyUpdateUrl: 'relative/path' }
+  },
+
+  // "executionMode" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     executionMode: 'compatibility' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     executionMode: 'groupByOrigin' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     executionMode: 'unknownValuesAreValid' }
+  },
+
+  // "trustedBiddingSignalsUrl" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsUrl: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsUrl: 'https://{{hosts[][www]}}/foo.js' }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsUrl: 'data:application/json,{}' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsUrl: `${window.location.origin}/foo.js`}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsUrl: 'relative/path' }
+  },
+
+  // "trustedBiddingSignalsKeys" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsKeys: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsKeys: {}}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsKeys: []}
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     trustedBiddingSignalsKeys: ['a', 4, 'Foo']}
+  },
+
+  // "userBiddingSignals" tests
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     userBiddingSignals: null }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     userBiddingSignals: 'foo' }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     userBiddingSignals: 15 }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     userBiddingSignals: [5, 'foo', [-6.4, {a: 'b'}]] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     userBiddingSignals: {a: [5, 'foo', {b: -6.4}] }}
+  },
+
+  // "ads" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: 5 }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: {} }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [] }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{}] }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{metadata: [{a:'b'}, 'c'], 1:[2,3]}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{renderUrl: 'https://somewhere.test/'}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{renderUrl: 'https://somewhere.test/'},
+                           {renderUrl: 'https://somewhere-else.test/'}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{renderUrl: 'https://somewhere.test/',
+                            metadata: null}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     ads: [{renderUrl: 'https://somewhere.test/',
+                            metadata: null,
+                            someOtherField: 'foo'}] }
+  },
+
+  // "adComponents" tests
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: null }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: 5 }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: {} }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [] }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{}] }
+  },
+  { expectJoinSucces: false,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{metadata: [{a:'b'}, 'c'], 1:[2,3]}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{renderUrl: 'https://somewhere.test/'}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{renderUrl: 'https://somewhere.test/'},
+                                    {renderUrl: 'https://elsewhere.test/'}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{renderUrl: 'https://somewhere.test/',
+                                     metadata: null}] }
+  },
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     adComponents: [{renderUrl: 'https://somewhere.test/',
+                                     metadata: null,
+                                     someOtherField: 'foo'}] }
+  },
+
+  // Miscellaneous tests.
+  { expectJoinSucces: true,
+    expectLeaveSucces: true,
+    interestGroup: { ...BASE_INTEREST_GROUP,
+                     extra: false,
+                     fields: {do:'not'},
+                     matter: 'at',
+                     all: [3,4,5] }
+  },
+];
+
+for (testCase of SIMPLE_JOIN_LEAVE_TEST_CASES) {
+  promise_test((async (testCase) => {
+    const INTEREST_GROUP_LIFETIME_SECS = 1;
+
+    let join_promise = navigator.joinAdInterestGroup(testCase.interestGroup,
+                                                     INTEREST_GROUP_LIFETIME_SECS);
+    assert_true(join_promise instanceof Promise, "join should return a promise");
+    if (testCase.expectJoinSucces) {
+      assert_equals(await join_promise, undefined);
+    } else {
+      let joinExceptionThrown = false;
+      try {
+        await join_promise;
+      } catch (e) {
+        joinExceptionThrown = true;
+      }
+      assert_true(joinExceptionThrown, 'Exception not thrown on join.');
+    }
+
+    let leave_promise = navigator.leaveAdInterestGroup(testCase.interestGroup,
+                                                       INTEREST_GROUP_LIFETIME_SECS);
+    assert_true(leave_promise instanceof Promise, "leave should return a promise");
+    if (testCase.expectLeaveSucces) {
+      assert_equals(await leave_promise, undefined);
+    } else {
+      let leaveExceptionThrown = false;
+      try {
+        await leave_promise;
+      } catch (e) {
+        leaveExceptionThrown = true;
+      }
+      assert_true(leaveExceptionThrown, 'Exception not thrown on leave.');
+    }
+  }).bind(undefined, testCase), 'Join and leave interest group: ' + JSON.stringify(testCase));
+}
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+
+  // Joining an interest group without a bidding script and run an auction.
+  // There should be no winner.
+  await joinInterestGroup(test, uuid, { biddingLogicUrl: null });
+  assert_equals(null, await runBasicFledgeAuction(test, uuid),
+                'Auction unexpectedly had a winner');
+
+  // Joining an interest group with a bidding script and the same owner/name as
+  // the previously joined interest group, and re-run the auction. There should
+  // be a winner this time.
+  await joinInterestGroup(test, uuid);
+  let url = await runBasicFledgeAuction(test, uuid);
+  assert_true('string' === typeof url,
+              'Wrong value type returned from auction: ' + typeof url);
+
+  // Re-join the first interest group, and re-run the auction. The interest
+  // group should be overwritten again, and there should be no winner.
+  await joinInterestGroup(test, uuid, { biddingLogicUrl: null });
+  assert_equals(null, await runBasicFledgeAuction(test, uuid),
+                'Auction unexpectedly had a winner');
+}, 'Join same interest group overwrites old matching group.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+
+  // Join an interest group, run an auction to make sure it was joined.
+  await joinInterestGroup(test, uuid);
+  let url = await runBasicFledgeAuction(test, uuid);
+  assert_true('string' === typeof url,
+              'Wrong value type returned from auction: ' + typeof url);
+
+  // Leave the interest group, re-run the auction. There should be no winner.
+  await leaveInterestGroup();
+  assert_equals(null, await runBasicFledgeAuction(test, uuid),
+                'Auction unexpectedly had a winner');
+}, 'Leaving interest group actually leaves interest group.');
+
+promise_test(async test => {
+  // This should not throw.
+  await leaveInterestGroup({ name: 'Never join group' });
+}, 'Leave an interest group that was never joined.');
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/no-winner.https.sub.window.js b/tests/wpt/web-platform-tests/fledge/tentative/no-winner.https.sub.window.js
new file mode 100644
index 00000000000..4d24b5738ea
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/no-winner.https.sub.window.js
@@ -0,0 +1,76 @@
+// META: script=/resources/testdriver.js
+// META: script=/common/utils.js
+// META: script=resources/fledge-util.js
+
+// The tests in this file focus on simple auctions (one bidder, one seller, one
+// origin, one frame) which have no winning bid, either due to errors or due to
+// there being no bids, except where tests fit better with another set of tests.
+
+// Errors common to bidding and decision logic scripts. These atrings will be
+// appended to script URLs to make the python scripts that generate bidding
+// logic and decision logic scripts with errors.
+const COMMON_SCRIPT_ERRORS = [
+  'error=http-error',
+  'error=no-content-type',
+  'error=wrong-content-type',
+  'error=bad-allow-fledge',
+  'error=fledge-not-allowed',
+  'error=no-allow-fledge',
+  'error=no-body',
+];
+
+const BIDDING_LOGIC_SCRIPT_ERRORS = [
+  ...COMMON_SCRIPT_ERRORS,
+  'error=no-generateBid',
+  'generateBid=throw 1;',
+  'generateBid=This does not compile',
+  // Default timeout test. Doesn't check how long timing out takes.
+  'generateBid=while(1);',
+  // Bad return values:
+  'generateBid=return 5;',
+  'generateBid=return "Foo";',
+  'generateBid=return interestGroup.ads[0].renderUrl;',
+  'generateBid=return {bid: 1, render: "https://not-in-ads-array.test/"};',
+  'generateBid=return {bid: 1};',
+  'generateBid=return {render: interestGroup.ads[0].renderUrl};',
+  // These are not bidding rather than errors.
+  'generateBid=return {bid:0, render: interestGroup.ads[0].renderUrl};',
+  'generateBid=return {bid:-1, render: interestGroup.ads[0].renderUrl};',
+];
+
+const DECISION_LOGIC_SCRIPT_ERRORS = [
+  ...COMMON_SCRIPT_ERRORS,
+  'error=no-scoreAd',
+  'scoreAd=throw 1;',
+  'scoreAd=This does not compile',
+  // Default timeout test. Doesn't check how long timing out takes.
+  'scoreAd=while(1);',
+  // Bad return values:
+  'scoreAd=return "Foo";',
+  'scoreAd=return {desirability: "Foo"};',
+  // These are rejecting the bid rather than errors.
+  'scoreAd=return 0;',
+  'scoreAd=return -1;',
+  'scoreAd=return {desirability: 0};',
+  'scoreAd=return {desirability: -1};',
+];
+
+for (error of BIDDING_LOGIC_SCRIPT_ERRORS) {
+  promise_test((async (error, test) => {
+    let biddingLogicUrl = `${BASE_URL}resources/bidding-logic.sub.py?${error}`;
+    await runBasicFledgeTestExpectingNoWinner(
+      test,
+      {interestGroupOverrides: {biddingLogicUrl: biddingLogicUrl}}
+    );
+  }).bind(undefined, error), `Bidding logic script: ${error}`);
+}
+
+for (error of DECISION_LOGIC_SCRIPT_ERRORS) {
+  promise_test((async (error, test) => {
+    let decisionLogicUrl =
+        `${BASE_URL}resources/decision-logic.sub.py?${error}`;
+    await runBasicFledgeTestExpectingNoWinner(
+      test, {auctionConfigOverrides: {decisionLogicUrl: decisionLogicUrl}}
+    );
+  }).bind(undefined, error), `Decision logic script: ${error}`);
+}
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/reporting-arguments.https.sub.window.js b/tests/wpt/web-platform-tests/fledge/tentative/reporting-arguments.https.sub.window.js
new file mode 100644
index 00000000000..69b7d2fddda
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/reporting-arguments.https.sub.window.js
@@ -0,0 +1,289 @@
+// META: script=/resources/testdriver.js
+// META: script=/common/utils.js
+// META: script=resources/fledge-util.js
+// META: timeout=long
+
+// Simplified version of reportTest() for validating arguments to reporting
+// methods. Only takes expressions to check in reporting methods. "uuid" is
+// optional, and one is generated if not passed one.
+async function runReportArgumentValidationTest(
+    test, reportResultSuccessCondition, reportWinSuccessCondition, uuid) {
+  if (!uuid)
+    uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      reportResultSuccessCondition,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      reportWinSuccessCondition,
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}
+
+/////////////////////////////////////////////////////////////////////
+// reportResult() to reportWin() message passing tests
+/////////////////////////////////////////////////////////////////////
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');
+      return 45;`,
+      // reportWin:
+      'sellerSignals === 45',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}, 'Seller passes number to bidder.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');
+      return 'foo';`,
+      // reportWin:
+      'sellerSignals === "foo"',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}, 'Seller passes string to bidder.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');
+      return [3, 1, 2];`,
+      // reportWin:
+      'JSON.stringify(sellerSignals) === "[3,1,2]"',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}, 'Seller passes array to bidder.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');
+      return {a: 4, b:['c', null, {}]};`,
+      // reportWin:
+      `JSON.stringify(sellerSignals) === '{"a":4,"b":["c",null,{}]}'`,
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}, 'Seller passes object to bidder.');
+
+/////////////////////////////////////////////////////////////////////
+// reportResult() / reportWin() browserSignals tests.
+/////////////////////////////////////////////////////////////////////
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.topWindowHostname === "${window.location.hostname}"`,
+    // reportWinSuccessCondition:
+    `browserSignals.topWindowHostname === "${window.location.hostname}"`
+  );
+}, 'browserSignals.topWindowHostname test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.seller === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.seller === "${window.location.origin}"`
+  );
+}, 'browserSignals.seller test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.topLevelSeller === undefined &&
+     browserSignals.componentSeller === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.topLevelSeller === undefined &&
+     browserSignals.componentSeller === undefined`
+  );
+}, 'browserSignals.topLevelSeller and browserSignals.componentSeller test.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.renderUrl === "${createRenderUrl(uuid)}"`,
+    // reportWinSuccessCondition:
+    `browserSignals.renderUrl === "${createRenderUrl(uuid)}"`,
+    uuid
+  );
+}, 'browserSignals.renderUrl test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.bid === 9`,
+    // reportWinSuccessCondition:
+    `browserSignals.bid === 9`
+  );
+}, 'browserSignals.bid test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.desirability === 18`,
+    // reportWinSuccessCondition:
+    `browserSignals.desirability === undefined`
+  );
+}, 'browserSignals.desirability test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.topLevelSellerSignals === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.topLevelSellerSignals === undefined`
+  );
+}, 'browserSignals.topLevelSellerSignals test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.dataVersion === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.dataVersion === undefined`
+  );
+}, 'browserSignals.dataVersion test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.modifiedBid === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.modifiedBid === undefined`
+  );
+}, 'browserSignals.modifiedBid test.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 0`,
+    // reportWinSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 0`,
+    uuid
+  );
+}, 'browserSignals.highestScoringOtherBid with no other interest groups test.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: -2}),
+                            name: 'other interest group 1' });
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: -1}),
+                            name: 'other interest group 2' });
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 0`,
+    // reportWinSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 0`,
+    uuid
+  );
+}, 'browserSignals.highestScoringOtherBid with other groups that do not bid.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: 2}),
+                            name: 'other interest group 1' });
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: 5}),
+                            name: 'other interest group 2' });
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: 2}),
+                            name: 'other interest group 3' });
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 5`,
+    // reportWinSuccessCondition:
+    `browserSignals.highestScoringOtherBid === 5`,
+    uuid
+  );
+}, 'browserSignals.highestScoringOtherBid with other bids.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.interestGroupName === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.interestGroupName === "default name"`
+  );
+}, 'browserSignals.interestGroupName test.');
+
+promise_test(async test => {
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === false`
+  );
+}, 'browserSignals.madeHighestScoringOtherBid with no other bids.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await joinInterestGroup(test, uuid,
+                          { biddingLogicUrl: createBiddingScriptUrl({bid: -1}),
+                            name: 'other interest group 2' });
+  await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === false`
+  );
+}, 'browserSignals.madeHighestScoringOtherBid with group that did not bid.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await joinInterestGroup(test, uuid,
+    { biddingLogicUrl: createBiddingScriptUrl({bid: 1}),
+      name: 'other interest group 2' });
+await runReportArgumentValidationTest(
+    test,
+    // reportResultSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === undefined`,
+    // reportWinSuccessCondition:
+    `browserSignals.madeHighestScoringOtherBid === true`,
+    uuid
+  );
+}, 'browserSignals.madeHighestScoringOtherBid with other bid.');
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/bidding-logic.sub.py b/tests/wpt/web-platform-tests/fledge/tentative/resources/bidding-logic.sub.py
new file mode 100644
index 00000000000..dfc4d86be35
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/bidding-logic.sub.py
@@ -0,0 +1,50 @@
+# General bidding logic script. Depending on query parameters, it can
+# simulate a variety of network errors, and its generateBid() and
+# reportWin() functions can have arbitrary Javascript code injected
+# in them. generateBid() will by default return a bid of 9 for the
+# first ad.
+def main(request, response):
+    error = request.GET.first(b"error", None)
+
+    if error == b"http-error":
+        response.status = (404, b"OK")
+    else:
+        response.status = (200, b"OK")
+
+    if error == b"wrong-content-type":
+        response.headers.set(b"Content-Type", b"application/json")
+    elif error != b"no-content-type":
+        response.headers.set(b"Content-Type", b"application/javascript")
+
+    if error == b"bad-allow-fledge":
+        response.headers.set(b"X-Allow-FLEDGE", b"sometimes")
+    elif error == b"fledge-not-allowed":
+        response.headers.set(b"X-Allow-FLEDGE", b"false")
+    elif error != b"no-allow-fledge":
+        response.headers.set(b"X-Allow-FLEDGE", b"true")
+
+    body = b''
+    if error == b"no-body":
+        return body
+    if error != b"no-generateBid":
+        body += b"""
+            function generateBid(interestGroup, auctionSignals, perBuyerSignals,
+                                trustedBiddingSignals, browserSignals,
+                                directFromSellerSignals) {
+              {{GET[generateBid]}};
+              return {
+                'bid': 9,
+                'render': interestGroup.ads[0].renderUrl
+              };
+            }"""
+    bid = request.GET.first(b"bid", None)
+    if bid != None:
+      body = body.replace(b"9", bid)
+    if error != b"no-reportWin":
+        body += b"""
+            function reportWin(auctionSignals, perBuyerSignals, sellerSignals,
+                              browserSignals, directFromSellerSignals) {
+              {{GET[reportWin]}};
+            }"""
+    return body
+
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/decision-logic.sub.py b/tests/wpt/web-platform-tests/fledge/tentative/resources/decision-logic.sub.py
new file mode 100644
index 00000000000..8d5303ac5a4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/decision-logic.sub.py
@@ -0,0 +1,47 @@
+# General decision logic script. Depending on query parameters, it can
+# simulate a variety of network errors, and its scoreAd() and
+# reportResult() functions can have arbitrary Javascript code injected
+# in them. scoreAd() will by default return a desirability score of
+# twice the bid for each ad, as long as the ad URL ends with the uuid.
+def main(request, response):
+    error = request.GET.first(b"error", None)
+
+    if error == b"http-error":
+        response.status = (404, b"OK")
+    else:
+        response.status = (200, b"OK")
+
+    if error == b"wrong-content-type":
+        response.headers.set(b"Content-Type", b"application/json")
+    elif error != b"no-content-type":
+        response.headers.set(b"Content-Type", b"application/javascript")
+
+    if error == b"bad-allow-fledge":
+        response.headers.set(b"X-Allow-FLEDGE", b"sometimes")
+    elif error == b"fledge-not-allowed":
+        response.headers.set(b"X-Allow-FLEDGE", b"false")
+    elif error != b"no-allow-fledge":
+        response.headers.set(b"X-Allow-FLEDGE", b"true")
+
+    body = b''
+    if error == b"no-body":
+        return body
+    if error != b"no-scoreAd":
+        body += b"""
+            function scoreAd(adMetadata, bid, auctionConfig, trustedScoringSignals,
+                            browserSignals) {
+              // Don't bid on interest group with the wrong uuid. This is to prevent
+              // left over interest groups from other tests from affecting auction
+              // results.
+              if (!browserSignals.renderUrl.endsWith('{{GET[uuid]}}'))
+                return 0;
+
+              {{GET[scoreAd]}};
+              return {desirability: 2 * bid, allowComponentAuction: true};
+            }"""
+    if error != b"no-reportResult":
+        body += b"""
+            function reportResult(auctionConfig, browserSignals, directFromSellerSignals) {
+              {{GET[reportResult]}};
+            }"""
+    return body
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html b/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html
new file mode 100644
index 00000000000..eaca3f49fd1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html
@@ -0,0 +1,5 @@
+<!DOCTYPE html>
+<html>
+<body>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html.headers b/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html.headers
new file mode 100644
index 00000000000..bc74b5851b6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/fenced_frame.sub.html.headers
@@ -0,0 +1,2 @@
+Content-Type: text/html
+Supports-Loading-Mode: fenced-frame
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/fledge-util.js b/tests/wpt/web-platform-tests/fledge/tentative/resources/fledge-util.js
new file mode 100644
index 00000000000..9f95a59e43a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/fledge-util.js
@@ -0,0 +1,275 @@
+const FULL_URL = window.location.href;
+const BASE_URL = FULL_URL.substring(0, FULL_URL.lastIndexOf('/') + 1);
+const BASE_PATH = (new URL(BASE_URL)).pathname;
+
+const DEFAULT_INTEREST_GROUP_NAME = 'default name';
+
+// Creates a URL that will be sent to the URL request tracker script.
+// `uuid` is used to identify the stash shard to use.
+// `dispatch` affects what the tracker script does.
+// `id` can be used to uniquely identify tracked requests. It has no effect
+//     on behavior of the script; it only serves to make the URL unique.
+function createTrackerUrl(origin, uuid, dispatch, id = null) {
+  let url = new URL(`${origin}${BASE_PATH}resources/request_tracker.py`);
+  url.searchParams.append('uuid', uuid);
+  url.searchParams.append('dispatch', dispatch);
+  if (id)
+    url.searchParams.append('id', id);
+  return url.toString();
+}
+
+// Create tracked bidder/seller URLs. The only difference is the prefix added
+// to the `id` passed to createTrackerUrl. The optional `id` field allows
+// multiple bidder/seller report URLs to be distinguishable from each other.
+function createBidderReportUrl(uuid, id = '1') {
+  return createTrackerUrl(window.location.origin, uuid, `track_get`,
+                          `bidder_report_${id}`);
+}
+function createSellerReportUrl(uuid, id = '1') {
+  return createTrackerUrl(window.location.origin, uuid, `track_get`,
+                          `seller_report_${id}`);
+}
+
+// Generates a UUID and registers a cleanup method with the test fixture to
+// request a URL from the request tracking script that clears all data
+// associated with the generated uuid when requested.
+function generateUuid(test) {
+  let uuid = token();
+  test.add_cleanup(async () => {
+    let cleanupUrl = createTrackerUrl(window.location.origin, uuid, 'clean_up');
+    let response = await fetch(cleanupUrl, {credentials: 'omit', mode: 'cors'});
+    assert_equals(await response.text(), 'cleanup complete',
+                  `Sever state cleanup failed`);
+  });
+  return uuid;
+}
+
+// Repeatedly requests "request_list" URL until exactly the URLs listed
+// in "expectedRequests" have been observed by the request tracker script (in
+// any order, since report URLs are not guaranteed to be sent in any order).
+//
+// If any other strings are received from the tracking script, or the tracker
+// script reports an error, fails the test.
+async function waitForObservedRequests(uuid, expectedRequests) {
+  let trackedRequestsUrl = createTrackerUrl(window.location.origin, uuid,
+                                            'request_list');
+  // Sort array for easier comparison, since order doesn't matter.
+  expectedRequests.sort();
+  while (true) {
+    let response = await fetch(trackedRequestsUrl,
+                               {credentials: 'omit', mode: 'cors'});
+    let trackerData = await response.json();
+
+    // Fail on fetch error.
+    if (trackerData.error) {
+      throw trackedRequestsUrl + ' fetch failed:' +
+          JSON.stringify(trackerData);
+    }
+
+    // Fail on errors reported by the tracker script.
+    if (trackerData.errors.length > 0) {
+      throw 'Errors reported by request_tracker.py:' +
+          JSON.stringify(trackerData.errors);
+    }
+
+    // If expected number of requests have been observed, compare with list of
+    // all expected requests and exit.
+    let trackedRequests = trackerData.trackedRequests;
+    if (trackedRequests.length == expectedRequests.length) {
+      assert_array_equals(trackedRequests.sort(), expectedRequests);
+      break;
+    }
+
+    // If fewer than total number of expected requests have been observed,
+    // compare what's been received so far, to have a greater chance to fail
+    // rather than hang on error.
+    for (const trackedRequest of trackedRequests) {
+      assert_in_array(trackedRequest, expectedRequests);
+    }
+  }
+}
+
+// Creates a bidding script with the provided code in the method bodies. The
+// bidding script's generateBid() method will return a bid of 9 for the first
+// ad, after the passed in code in the "generateBid" input argument has been
+// run, unless it returns something or throws.
+//
+// The default reportWin() method is empty.
+function createBiddingScriptUrl(params = {}) {
+  let url = new URL(`${BASE_URL}resources/bidding-logic.sub.py`);
+  if (params.generateBid)
+    url.searchParams.append('generateBid', params.generateBid);
+  if (params.reportWin)
+    url.searchParams.append('reportWin', params.reportWin);
+  if (params.error)
+    url.searchParams.append('error', params.error);
+  if (params.bid)
+    url.searchParams.append('bid', params.bid);
+  return url.toString();
+}
+
+// Creates a decision script with the provided code in the method bodies. The
+// decision script's scoreAd() method will reject ads with renderUrls that
+// don't ends with "uuid", and will return a score equal to the bid, after the
+// passed in code in the "scoreAd" input argument has been run, unless it
+// returns something or throws.
+//
+// The default reportResult() method is empty.
+function createDecisionScriptUrl(uuid, params = {}) {
+  let url = new URL(`${BASE_URL}resources/decision-logic.sub.py`);
+  url.searchParams.append('uuid', uuid);
+  if (params.scoreAd)
+    url.searchParams.append('scoreAd', params.scoreAd);
+  if (params.reportResult)
+    url.searchParams.append('reportResult', params.reportResult);
+  if (params.error)
+    url.searchParams.append('error', params.error);
+  return url.toString();
+}
+
+// Creates a renderUrl for an ad that runs the passed in "script". "uuid" has
+// no effect, beyond making the URL distinct between tests, and being verified
+// by the decision logic script before accepting a bid.
+function createRenderUrl(uuid) {
+  let url = new URL(`${BASE_URL}resources/fenced_frame.sub.html`);
+  url.searchParams.append('uuid', uuid);
+  return url.toString();
+}
+
+// Joins an interest group that, by default, is owned by the current frame's
+// origin, is named DEFAULT_INTEREST_GROUP_NAME, has a bidding script that
+// issues a bid of 9 with a renderUrl of "https://not.checked.test/${uuid}",
+// and sends a report to createBidderReportUrl(uuid) if it wins. Waits for the
+// join command to complete. Adds cleanup command to `test` to leave the
+// interest group when the test completes.
+//
+// `interestGroupOverrides` may be used to override fields in the joined
+// interest group.
+async function joinInterestGroup(test, uuid, interestGroupOverrides = {}) {
+  const INTEREST_GROUP_LIFETIME_SECS = 60;
+
+  let interestGroup = {
+    owner: window.location.origin,
+    name: DEFAULT_INTEREST_GROUP_NAME,
+    biddingLogicUrl: createBiddingScriptUrl(
+        { reportWin: `sendReportTo('${createBidderReportUrl(uuid)}');` }),
+    ads: [{renderUrl: createRenderUrl(uuid)}],
+    ...interestGroupOverrides
+  };
+
+  await navigator.joinAdInterestGroup(interestGroup,
+                                      INTEREST_GROUP_LIFETIME_SECS);
+  test.add_cleanup(
+      async () => {await navigator.leaveAdInterestGroup(interestGroup)});
+}
+
+// Similar to joinInterestGroup, but leaves the interest group instead.
+// Generally does not need to be called manually when using
+// "joinInterestGroup()".
+async function leaveInterestGroup(interestGroupOverrides = {}) {
+  let interestGroup = {
+    owner: window.location.origin,
+    name: DEFAULT_INTEREST_GROUP_NAME,
+    ...interestGroupOverrides
+  };
+
+  await navigator.leaveAdInterestGroup(interestGroup);
+}
+
+// Runs a FLEDGE auction and returns the result. By default, the seller is the
+// current frame's origin, and the only buyer is as well. The seller script
+// rejects bids for URLs that don't contain "uuid" (to avoid running into issues
+// with any interest groups from other tests), and reportResult() sends a report
+// to createSellerReportUrl(uuid).
+//
+// `auctionConfigOverrides` may be used to override fields in the auction
+// configuration.
+async function runBasicFledgeAuction(test, uuid, auctionConfigOverrides = {}) {
+  let auctionConfig = {
+    seller: window.location.origin,
+    decisionLogicUrl: createDecisionScriptUrl(
+        uuid,
+        { reportResult: `sendReportTo('${createSellerReportUrl(uuid)}');` }),
+    interestGroupBuyers: [window.location.origin],
+    ...auctionConfigOverrides
+  };
+  return await navigator.runAdAuction(auctionConfig);
+}
+
+// Calls runBasicFledgeAuction(), expecting the auction to have a winner.
+// Creates a fenced frame that will be destroyed on completion of "test", and
+// navigates it to the URN URL returned by the auction. Does not wait for the
+// fenced frame to finish loading, since there's no API that can do that.
+async function runBasicFledgeAuctionAndNavigate(test, uuid,
+                                                auctionConfigOverrides = {}) {
+  let url = await runBasicFledgeAuction(test, uuid, auctionConfigOverrides);
+  assert_equals(typeof url, 'string',
+                `Wrong value type returned from auction: ${typeof url}`);
+
+  let fencedFrame = document.createElement('fencedframe');
+  fencedFrame.mode = 'opaque-ads';
+  fencedFrame.src = url;
+  document.body.appendChild(fencedFrame);
+  test.add_cleanup(() => { document.body.removeChild(fencedFrame); });
+}
+
+// Joins an interest group and runs an auction, expecting no winner to be
+// returned. "testConfig" can optionally modify the interest group or
+// auctionConfig.
+async function runBasicFledgeTestExpectingNoWinner(test, testConfig = {}) {
+  const uuid = generateUuid(test);
+  await joinInterestGroup(test, uuid, testConfig.interestGroupOverrides);
+  let result = await runBasicFledgeAuction(
+      test, uuid, testConfig.auctionConfigOverrides);
+  assert_equals(result, null, 'Auction unexpectedly had a winner');
+}
+
+// Test helper for report phase of auctions that lets the caller specify the
+// body of reportResult() and reportWin(). Passing in null will cause there
+// to be no reportResult() or reportWin() method.
+//
+// If the "SuccessCondition" fields are non-null and evaluate to false in
+// the corresponding reporting method, the report is sent to an error URL.
+// Otherwise, the corresponding 'reportResult' / 'reportWin' values are run.
+//
+// Requesting error report URLs causes waitForObservedRequests() to throw
+// rather than hang.
+async function runReportTest(test, uuid, reportResultSuccessCondition,
+                             reportResult, reportWinSuccessCondition, reportWin,
+                             expectedReportUrls) {
+  if (reportResultSuccessCondition) {
+    reportResult = `if (!(${reportResultSuccessCondition})) {
+                      sendReportTo('${createSellerReportUrl(uuid, 'error')}');
+                      return false;
+                    }
+                    ${reportResult}`;
+  }
+  let decisionScriptUrlParams = {};
+  if (reportResult !== null)
+    decisionScriptUrlParams.reportResult = reportResult;
+  else
+    decisionScriptUrlParams.error = 'no-reportResult';
+
+  if (reportWinSuccessCondition) {
+    reportWin = `if (!(${reportWinSuccessCondition})) {
+                   sendReportTo('${createSellerReportUrl(uuid, 'error')}');
+                   return false;
+                 }
+                 ${reportWin}`;
+  }
+  let biddingScriptUrlParams = {};
+  if (reportWin !== null)
+    biddingScriptUrlParams.reportWin = reportWin;
+  else
+    biddingScriptUrlParams.error = 'no-reportWin';
+
+  let interestGroupOverrides =
+      { biddingLogicUrl: createBiddingScriptUrl(biddingScriptUrlParams) };
+
+  await joinInterestGroup(test, uuid, interestGroupOverrides);
+  await runBasicFledgeAuctionAndNavigate(
+      test, uuid,
+      { decisionLogicUrl: createDecisionScriptUrl(
+                              uuid, decisionScriptUrlParams) });
+  await waitForObservedRequests(uuid, expectedReportUrls);
+}
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/resources/request_tracker.py b/tests/wpt/web-platform-tests/fledge/tentative/resources/request_tracker.py
new file mode 100644
index 00000000000..5fedd727deb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/resources/request_tracker.py
@@ -0,0 +1,78 @@
+import mimetypes
+import os
+import json
+import wptserve.stash
+
+from wptserve.utils import isomorphic_decode, isomorphic_encode
+
+# Test server that tracks requests it has previously seen, keyed by a token.
+#
+# All requests have a "dispatch" field indicating what to do, and a "uuid"
+# field which should be unique for each test, to avoid tests that fail to
+# clean up after themselves, or that are running concurrently, from interfering
+# with other tests.
+#
+# Each uuid has a stash entry with a dictionary with two entries:
+#     "trackedRequests" is a list of all observed requested URLs with a
+#         dispatch of "track_get".
+#     "errors" is a list of an errors that occurred.
+#
+# A dispatch of "request_list" will return the "trackedRequests" dictionary
+# associated with the in uuid, as a JSON string.
+#
+# A dispatch of "clean_up" will delete all information associated with the uuid.
+def main(request, response):
+    # Don't cache responses, since tests expect duplicate requests to always
+    # reach the server.
+    response.headers.set(b"Cache-Control", b"no-store")
+
+    dispatch = request.GET.first(b"dispatch", None)
+    uuid = request.GET.first(b"uuid", None)
+
+    if not uuid or not dispatch:
+        return simple_response(request, response, 404, b"Not found",
+                               b"Invalid query parameters")
+
+    stash = request.server.stash
+    with stash.lock:
+        # Take ownership of stashed entry, if any. This removes the entry of the
+        # stash.
+        server_state = stash.take(uuid) or {"trackedRequests": [], "errors": []}
+
+        # Clear the entire stash. No work to do, since stash entry was already
+        # removed.
+        if dispatch == b"clean_up":
+            return simple_response(request, response, 200, b"OK",
+                                   b"cleanup complete")
+
+        # Return the list of entries in the stash. Need to add data back to the
+        # stash first.
+        if dispatch == b"request_list":
+            stash.put(uuid, server_state)
+            return simple_response(request, response, 200, b"OK",
+                                   json.dumps(server_state))
+
+        # Tracks a request that's expected to be a GET.
+        if dispatch == b"track_get":
+            if request.method != "GET":
+                server_state["errors"].append(
+                    request.url + " has wrong method: " + request.method)
+            else:
+                server_state["trackedRequests"].append(request.url)
+
+            stash.put(uuid, server_state)
+            return simple_response(request, response, 200, b"OK", b"")
+
+        # Report unrecognized dispatch line.
+        server_state["errors"].append(
+            request.url + " request with unknown dispatch value received: " +
+            dispatch.decode("utf-8"))
+        stash.put(uuid, server_state)
+        return simple_response(request, response, 404, b"Not Found",
+                               b"Unrecognized dispatch parameter: " + dispatch)
+
+def simple_response(request, response, status_code, status_message, body,
+                    content_type=b"text/plain"):
+    response.status = (status_code, status_message)
+    response.headers.set(b"Content-Type", content_type)
+    return body
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/send-report-to.https.sub.window.js b/tests/wpt/web-platform-tests/fledge/tentative/send-report-to.https.sub.window.js
new file mode 100644
index 00000000000..bb0e7873a70
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fledge/tentative/send-report-to.https.sub.window.js
@@ -0,0 +1,161 @@
+// META: script=/resources/testdriver.js
+// META: script=/common/utils.js
+// META: script=resources/fledge-util.js
+// META: timeout=long
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      'sellerSignals === null',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      [createSellerReportUrl(uuid), createBidderReportUrl(uuid)]
+  );
+}, 'Both send reports, seller passes nothing to bidder.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      null,
+      '',
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid)]
+  );
+}, 'Only seller sends a report');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      null,
+      'throw new Error("Very serious exception")',
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid)]
+  );
+}, 'Only seller sends a report, bidder throws an exception');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      null,
+      null,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid)]
+  );
+}, 'Only seller sends a report, bidder has no reportWin() method');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      '',
+      // reportWin:
+      'sellerSignals === null',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createBidderReportUrl(uuid)]
+  );
+}, 'Only bidder sends a report');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      'return "foo";',
+      // reportWin:
+      'sellerSignals === "foo"',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createBidderReportUrl(uuid)]
+  );
+}, 'Only bidder sends a report, seller passes a message to bidder');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      'throw new Error("Very serious exception")',
+      // reportWin:
+      'sellerSignals === null',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createBidderReportUrl(uuid)]
+  );
+}, 'Only bidder sends a report, seller throws an exception');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      null,
+      // reportWin:
+      'sellerSignals === null',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createBidderReportUrl(uuid)]
+  );
+}, 'Only bidder sends a report, seller has no reportResult() method');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');
+       sendReportTo('${createSellerReportUrl(uuid)}');
+       return 5;`,
+      // reportWin:
+      'sellerSignals === null',
+      `sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createBidderReportUrl(uuid)]
+  );
+}, 'Seller calls sendReportTo() twice, which throws an exception.');
+
+promise_test(async test => {
+  const uuid = generateUuid(test);
+  await runReportTest(
+      test, uuid,
+      // reportResult:
+      null,
+      `sendReportTo('${createSellerReportUrl(uuid)}');`,
+      // reportWin:
+      null,
+      `sendReportTo('${createBidderReportUrl(uuid)}');
+       sendReportTo('${createBidderReportUrl(uuid)}');`,
+      // expectedReportUrls:
+      [createSellerReportUrl(uuid)]
+  );
+  // Seller reports may be sent before bidder reports, since reportWin()
+  // takes output from reportResult() as input. Wait to make sure the
+  // bidder report URL really is not being requested.
+  await new Promise(resolve => test.step_timeout(resolve, 200));
+  await waitForObservedRequests(uuid, [createSellerReportUrl(uuid)]);
+}, 'Bidder calls sendReportTo() twice, which throws an exception.');
diff --git a/tests/wpt/web-platform-tests/fs/FileSystemBaseHandle-buckets.https.any.js b/tests/wpt/web-platform-tests/fs/FileSystemBaseHandle-buckets.https.any.js
index 6bb7d771194..cd78c5a9508 100644
--- a/tests/wpt/web-platform-tests/fs/FileSystemBaseHandle-buckets.https.any.js
+++ b/tests/wpt/web-platform-tests/fs/FileSystemBaseHandle-buckets.https.any.js
@@ -1,3 +1,4 @@
 // META: script=resources/test-helpers.js
 // META: script=resources/sandboxed-fs-test-helpers.js
+// META: script=/storage/buckets/resources/util.js
 // META: script=script-tests/FileSystemBaseHandle-buckets.js
diff --git a/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-buckets.js b/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-buckets.js
index 98261995f96..01c41231808 100644
--- a/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-buckets.js
+++ b/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-buckets.js
@@ -1,6 +1,8 @@
 'use strict';
 
 directory_test(async (t, root_dir) => {
+  await prepareForBucketTest(t);
+
   const inboxBucket = await navigator.storageBuckets.open('inbox');
   const inboxRootDir = await inboxBucket.getDirectory();
 
@@ -12,6 +14,8 @@ directory_test(async (t, root_dir) => {
 }, 'isSameEntry works as expected with buckets');
 
 directory_test(async (t, root_dir) => {
+  await prepareForBucketTest(t);
+
   const inboxBucket = await navigator.storageBuckets.open('inbox');
   await navigator.storageBuckets.delete('inbox');
   const directoryPromise = inboxBucket.getDirectory();
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
index eddf3c1ea91..80cda234bb8 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
@@ -21,11 +21,18 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('green.png'), 0, 0, 100, 50, 0, 0, 100, 50);
-_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+fetch('/images/green.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
+        _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
index 48ab9376ffb..b7487e09991 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
@@ -21,11 +21,18 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('rgrg-256x256.png'), 140, 20, 100, 50, 0, 0, 100, 50);
-_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
+        ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
+        _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
index 5946cb30c9a..567b4abfcff 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
@@ -21,18 +21,25 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('rgrg-256x256.png'), 0, 0, 256, 256, 0, 0, 100, 50);
-ctx.fillStyle = '#0f0';
-ctx.fillRect(0, 0, 51, 26);
-ctx.fillRect(49, 24, 51, 26);
-_assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 20,20, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
+        ctx.fillStyle = '#0f0';
+        ctx.fillRect(0, 0, 51, 26);
+        ctx.fillRect(49, 24, 51, 26);
+        _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 20,20, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.alpha.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.alpha.html
index 36db82e4edb..8926a72c9da 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.alpha.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.alpha.html
@@ -22,8 +22,15 @@ _addTest(function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalAlpha = 0;
-ctx.drawImage(document.getElementById('red.png'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
index 6afc4e713c4..779397f6b9b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
@@ -19,8 +19,15 @@
 var t = async_test("drawImage() of an APNG draws the poster frame");
 _addTest(function(canvas, ctx) {
 
-ctx.drawImage(document.getElementById('anim-poster-gr.png'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('anim-poster-gr.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html
index 4b22ffc8ba6..7e9f1451963 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html
@@ -19,13 +19,19 @@
 var t = async_test("");
 _addTest(function(canvas, ctx) {
 
-ctx.fillStyle = '#0f0';
-ctx.fillRect(0, 0, 100, 50);
-var img = document.getElementById('broken.png');
-assert_throws_dom("INVALID_STATE_ERR", function() { ctx.drawImage(img, 0, 0); });
+fetch('/images/broken.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.fillStyle = '#0f0';
+        ctx.fillRect(0, 0, 100, 50);
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
 </script>
-<img src="/images/broken.png" id="broken.png" class="resource">
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.clip.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.clip.html
index fac98fe949d..380620faf34 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.clip.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.clip.html
@@ -23,8 +23,19 @@ ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.rect(-10, -10, 1, 1);
 ctx.clip();
-ctx.drawImage(document.getElementById('red.png'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.fillStyle = '#0f0';
+        ctx.fillRect(0, 0, 100, 50);
+        ctx.rect(-10, -10, 1, 1);
+        ctx.clip();
+        ctx.drawImage(document.getElementById('red.png'), 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.composite.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.composite.html
index 60204a5d27b..7b7deb0f91e 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.composite.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.composite.html
@@ -22,8 +22,15 @@ _addTest(function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalCompositeOperation = 'destination-over';
-ctx.drawImage(document.getElementById('red.png'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.floatsource.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
index 4b715f29fea..02e4626133d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
@@ -13,17 +13,23 @@
 
 <p class="output">Actual output:</p>
 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
-<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">
+
 <ul id="d"></ul>
 <script>
 var t = async_test("");
 _addTest(function(canvas, ctx) {
 
-ctx.drawImage(document.getElementById('green.png'), 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
 </script>
-<img src="/images/green.png" id="green.png" class="resource">
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedest.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
index 8418f635d48..1020754fa8f 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
@@ -21,18 +21,25 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 78, 50, 50, 0, 50, 50, -50);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 128, 50, -50, 100, 50, -50, -50);
-_assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
+        ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
+        _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedir.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
index 9a42e5af854..e02d0ff439d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
@@ -21,18 +21,25 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 0, 178, 50, -100, 0, 0, 50, 100);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 0, 78, 50, 100, 50, 100, 50, -100);
-_assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
+        ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
+        _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativesource.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
index 07b154b1f02..f15fc3adcb0 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
@@ -21,18 +21,25 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 78, -100, 50, 0, 0, 50, 50);
-ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 128, -100, -50, 50, 0, 50, 50);
-_assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
+        ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
+        _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
index 673cd3e64aa..f1ad616355d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
@@ -21,309 +21,315 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var red = document.getElementById('red.png');
-ctx.drawImage(red, Infinity, 0);
-ctx.drawImage(red, -Infinity, 0);
-ctx.drawImage(red, NaN, 0);
-ctx.drawImage(red, 0, Infinity);
-ctx.drawImage(red, 0, -Infinity);
-ctx.drawImage(red, 0, NaN);
-ctx.drawImage(red, Infinity, Infinity);
-ctx.drawImage(red, Infinity, 0, 100, 50);
-ctx.drawImage(red, -Infinity, 0, 100, 50);
-ctx.drawImage(red, NaN, 0, 100, 50);
-ctx.drawImage(red, 0, Infinity, 100, 50);
-ctx.drawImage(red, 0, -Infinity, 100, 50);
-ctx.drawImage(red, 0, NaN, 100, 50);
-ctx.drawImage(red, 0, 0, Infinity, 50);
-ctx.drawImage(red, 0, 0, -Infinity, 50);
-ctx.drawImage(red, 0, 0, NaN, 50);
-ctx.drawImage(red, 0, 0, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, -Infinity);
-ctx.drawImage(red, 0, 0, 100, NaN);
-ctx.drawImage(red, Infinity, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, 0, Infinity, 50);
-ctx.drawImage(red, Infinity, 0, Infinity, Infinity);
-ctx.drawImage(red, Infinity, 0, 100, Infinity);
-ctx.drawImage(red, 0, Infinity, Infinity, 50);
-ctx.drawImage(red, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, 0, Infinity, 100, Infinity);
-ctx.drawImage(red, 0, 0, Infinity, Infinity);
-ctx.drawImage(red, Infinity, 0, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, -Infinity, 0, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, NaN, 0, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, Infinity, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, -Infinity, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, NaN, 100, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, 0, Infinity, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, 0, -Infinity, 50, 0, 0, 100, 50);
-ctx.drawImage(red, 0, 0, NaN, 50, 0, 0, 100, 50);
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-ctx.drawImage(red, 0, 0, 100, -Infinity, 0, 0, 100, 50);
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-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
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-ctx.drawImage(red, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, 50);
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-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, 50);
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-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
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-ctx.drawImage(red, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, 50);
-ctx.drawImage(red, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
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-ctx.drawImage(red, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
-ctx.drawImage(red, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, 50);
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-ctx.drawImage(red, 0, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, 0, 0, 100, Infinity, 0, Infinity, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, Infinity, 0, 0, Infinity, 50);
-ctx.drawImage(red, 0, 0, 100, Infinity, 0, 0, Infinity, Infinity);
-ctx.drawImage(red, 0, 0, 100, Infinity, 0, 0, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, Infinity, 100, 50);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, Infinity, Infinity, 50);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, Infinity, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, 0, Infinity, 50);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, 0, Infinity, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, Infinity, 0, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, 0, Infinity, Infinity, 50);
-ctx.drawImage(red, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
-ctx.drawImage(red, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
-_assertPixel(canvas, 50,25, 0,255,0,255);
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, Infinity, 0);
+ctx.drawImage(bitmap, -Infinity, 0);
+ctx.drawImage(bitmap, NaN, 0);
+ctx.drawImage(bitmap, 0, Infinity);
+ctx.drawImage(bitmap, 0, -Infinity);
+ctx.drawImage(bitmap, 0, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity);
+        ctx.drawImage(bitmap, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity);
+        ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, -Infinity, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, NaN, 0, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, -Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, NaN, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, -Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, NaN, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, -Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, NaN, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, -Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, NaN, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, -Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, NaN, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, -Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, NaN, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, -Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, NaN);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, Infinity, 0, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, Infinity, 100, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, Infinity, 50, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, Infinity, 0, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, Infinity, 0, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, 50);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
+ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
+        _assertPixel(canvas, 50,25, 0,255,0,255);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nowrap.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
index 71b45a52d43..3fde82454a8 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
@@ -21,10 +21,17 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('redtransparent.png'), -1950, 0, 2000, 50);
-_assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-_assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, -1950, 0, 2000, 50);
+        _assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+        _assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.path.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.path.html
index 7cc5afe0942..ebc7040fa4b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.path.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.path.html
@@ -21,12 +21,18 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#0f0';
 ctx.rect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red.png'), 0, 0);
-ctx.fill();
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        ctx.fill();
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
 </script>
-<img src="/images/red.png" id="red.png" class="resource">
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html
index b01232d447d..5464e63e230 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.svg.html
@@ -19,11 +19,17 @@
 var t = async_test("drawImage() of an SVG image");
 _addTest(function(canvas, ctx) {
 
-ctx.drawImage(document.getElementById('green.svg'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('/images/green.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
 </script>
-<img src="/images/green.svg" id="green.svg" class="resource">
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.transform.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.transform.html
index c49070e69cb..2c8f930262b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.transform.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.transform.html
@@ -22,8 +22,15 @@ _addTest(function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.translate(100, 0);
-ctx.drawImage(document.getElementById('red.png'), 0, 0);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+fetch('red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.drawImage(bitmap, 0, 0);
+        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
index 3831f3cc864..c3ce69d9e0b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
@@ -21,10 +21,18 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red.png'), 10, 10, 0, 1, 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red.png'), 10, 10, 1, 0, 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red.png'), 10, 10, 0, 0, 0, 0, 100, 50);
-_assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+const red = async () => await createImageBitmap(await (await fetch("/images/red.png")).blob());
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+      });
+  });
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
index b37cd4d19da..403df3db463 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
@@ -21,10 +21,17 @@ _addTest(function(canvas, ctx) {
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zerowidth.svg'), 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zeroheight.svg'), 0, 0, 100, 50);
-ctx.drawImage(document.getElementById('red-zerosize.svg'), 0, 0, 100, 50);
-_assertPixel(canvas, 50,25, 0,255,0,255);
+fetch('/images/red-zerowidth.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          _assertPixel(canvas, 50,25, 0,255,0,255);
+      });
+});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html
index 32c690d9784..cd7ee9cf2a5 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.html
@@ -24,22 +24,18 @@ await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js
index 010fbd8bfa9..1c804a3961e 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.image.worker.js
@@ -19,21 +19,17 @@ var ctx = canvas.getContext('2d');
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html
index f057141895d..af1ca48e9d8 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.html
@@ -23,24 +23,20 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
         ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
         ctx.fillRect(0, 0, 100, 50);
         _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js
index 5607972635e..58ef4f3b9dc 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.imagepattern.worker.js
@@ -18,23 +18,19 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
         ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
         ctx.fillRect(0, 0, 100, 50);
         _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
index e7034126cf9..508376cd60c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.html
@@ -24,25 +24,20 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/green.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
         _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js
index 244bc90fe7f..36770f779be 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.basic.worker.js
@@ -19,24 +19,19 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/green.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
         _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
index ce6c758b3c8..4742fa21220 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.html
@@ -24,25 +24,20 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/rgrg-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
         _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js
index 1522353ad6e..2780240bd88 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcepos.worker.js
@@ -19,24 +19,19 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/rgrg-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
         _assertPixelApprox(canvas, 0,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,0, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 0,49, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 99,49, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
index 89acdb8e362..fd1c853b88a 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.html
@@ -24,17 +24,11 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/rgrg-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
         ctx.fillStyle = '#0f0';
         ctx.fillRect(0, 0, 51, 26);
@@ -47,9 +41,10 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js
index 6658e217505..2bb379e7ebb 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.9arg.sourcesize.worker.js
@@ -19,17 +19,11 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/rgrg-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/rgrg-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+    createImageBitmap(blob)
+      .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
         ctx.fillStyle = '#0f0';
         ctx.fillRect(0, 0, 51, 26);
@@ -42,8 +36,9 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 80,20, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 20,30, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 80,30, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html
index eb8476f7c3a..77134adfac5 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.html
@@ -25,22 +25,17 @@ await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalAlpha = 0;
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js
index 92cb23fe14d..07d8d9288df 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.alpha.worker.js
@@ -20,21 +20,16 @@ var ctx = canvas.getContext('2d');
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalAlpha = 0;
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
index ea4205abd44..2b33b7dd2d7 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.html
@@ -22,22 +22,17 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/anim-poster-gr.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('anim-poster-gr.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
index 94ca08a075b..5f246feb260 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.animated.poster.worker.js
@@ -17,21 +17,16 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/anim-poster-gr.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('anim-poster-gr.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html
index 37aae52a539..d9890f3057b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.html
@@ -22,24 +22,19 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/broken.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/broken.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.fillStyle = '#0f0';
         ctx.fillRect(0, 0, 100, 50);
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js
index d3f1b7e4a11..51560c443db 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.broken.worker.js
@@ -17,23 +17,18 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/broken.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/broken.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.fillStyle = '#0f0';
         ctx.fillRect(0, 0, 100, 50);
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html
index 970cb4d5a5a..994f601651d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.html
@@ -26,22 +26,21 @@ ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.rect(-10, -10, 1, 1);
 ctx.clip();
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 0, 0);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.fillStyle = '#0f0';
+        ctx.fillRect(0, 0, 100, 50);
+        ctx.rect(-10, -10, 1, 1);
+        ctx.clip();
+        ctx.drawImage(document.getElementById('red.png'), 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js
index d30a05fa9db..1a462aff681 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.clip.worker.js
@@ -21,21 +21,20 @@ ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.rect(-10, -10, 1, 1);
 ctx.clip();
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 0, 0);
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+        ctx.fillStyle = '#0f0';
+        ctx.fillRect(0, 0, 100, 50);
+        ctx.rect(-10, -10, 1, 1);
+        ctx.clip();
+        ctx.drawImage(document.getElementById('red.png'), 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html
index 90afbcbda8b..b4bc6f39ce9 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.html
@@ -25,22 +25,17 @@ await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalCompositeOperation = 'destination-over';
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js
index 0c4a7fe10a8..f6d4a5d284a 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.composite.worker.js
@@ -20,21 +20,16 @@ var ctx = canvas.getContext('2d');
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.globalCompositeOperation = 'destination-over';
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
index c6a3fbcf005..98ca580e591 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.html
@@ -22,22 +22,17 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
 });
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
-        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js
index 7b16cbb4f5f..7206099837d 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.floatsource.worker.js
@@ -17,21 +17,16 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+    });
 });
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
-        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
index 1c207673963..bfe2a9c96f6 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.html
@@ -24,17 +24,11 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
         ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -47,9 +41,10 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js
index 5ca4d14ef63..aebbb34b3ed 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js
@@ -19,17 +19,11 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
         ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -42,8 +36,9 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
index af274bf9bcd..46c571f1539 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.html
@@ -24,17 +24,11 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
         ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -47,9 +41,10 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js
index 2a6cc81058d..4bfb5433b86 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativedir.worker.js
@@ -19,17 +19,11 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
         ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -42,8 +36,9 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
index 5a7b2af7f2a..4e60d7e5e91 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.html
@@ -24,17 +24,11 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
         ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -47,9 +41,10 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js
index ada79f9137d..6d0bec1a1db 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.negativesource.worker.js
@@ -19,17 +19,11 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#f00';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/ggrr-256x256.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/ggrr-256x256.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
         ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
         _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2);
@@ -42,8 +36,9 @@ promise.then(function(response) {
         _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
index 4a6a23b0fc3..dc932df3cd0 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.html
@@ -24,17 +24,11 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/redtransparent.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, Infinity, 0);
 ctx.drawImage(bitmap, -Infinity, 0);
 ctx.drawImage(bitmap, NaN, 0);
@@ -337,9 +331,10 @@ ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
 ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
 ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
         _assertPixel(canvas, 50,25, 0,255,0,255);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js
index a2e77832a20..7dee1805806 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nonfinite.worker.js
@@ -19,17 +19,11 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/redtransparent.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, Infinity, 0);
 ctx.drawImage(bitmap, -Infinity, 0);
 ctx.drawImage(bitmap, NaN, 0);
@@ -332,8 +326,9 @@ ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, Infinity, Infinity);
 ctx.drawImage(bitmap, 0, 0, 100, 50, 0, Infinity, 100, Infinity);
 ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, Infinity, Infinity);
         _assertPixel(canvas, 50,25, 0,255,0,255);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
index a45fa15daed..fc167879786 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.html
@@ -24,24 +24,19 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/redtransparent.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, -1950, 0, 2000, 50);
         _assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js
index ab3a9367dd3..539c6bf9772 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.nowrap.worker.js
@@ -19,23 +19,18 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/redtransparent.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/redtransparent.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, -1950, 0, 2000, 50);
         _assertPixelApprox(canvas, 45,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
         _assertPixelApprox(canvas, 55,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html
index 938c014c7ab..3977880de19 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.html
@@ -24,23 +24,18 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.rect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         ctx.fill();
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js
index 55212909778..5132aa994f1 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.path.worker.js
@@ -19,22 +19,17 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.rect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         ctx.fill();
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
index 559eb9420e6..d5317dd0063 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.html
@@ -22,22 +22,17 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.svg');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/green.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
index 2d832be3636..fda62017c26 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.svg.worker.js
@@ -17,21 +17,16 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.svg');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('/images/green.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html
index e4d905474a4..bdbdb393cf8 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.html
@@ -25,22 +25,17 @@ await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.translate(100, 0);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js
index 2fc0caf1c31..a42f2785164 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.transform.worker.js
@@ -20,21 +20,16 @@ var ctx = canvas.getContext('2d');
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
 ctx.translate(100, 0);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
+fetch('red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
         ctx.drawImage(bitmap, 0, 0);
         _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+    });
+});
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
index d91a1960608..bdd68d20080 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.html
@@ -24,24 +24,20 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
-        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+const red = async () => await createImageBitmap(await (await fetch("/images/red.png")).blob());
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+      });
+  });
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
index 25cd54b57a0..5a0d4fcda29 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.html
@@ -24,24 +24,19 @@ var ctx = canvas.getContext('2d');
 await (function(canvas, ctx) {
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red-zerowidth.svg');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
+fetch('/images/red-zerowidth.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          _assertPixel(canvas, 50,25, 0,255,0,255);
+      });
 });
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        _assertPixel(canvas, 50,25, 0,255,0,255);
-    }, t_fail);
-}).then(t_pass, t_fail);
 })(canvas, ctx);
+t.done();
 
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
index 1465d6c1bc2..729e0e97a4c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.image.worker.js
@@ -19,23 +19,18 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/red-zerowidth.svg');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
+fetch('/images/red-zerowidth.svg')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 0, 0, 100, 50);
+          _assertPixel(canvas, 50,25, 0,255,0,255);
+      });
 });
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 0, 0, 100, 50);
-        _assertPixel(canvas, 50,25, 0,255,0,255);
-    }, t_fail);
-}).then(t_pass, t_fail);
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js
index 654e9bdd744..2655e3e91f5 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/drawing-images-to-the-canvas/2d.drawImage.zerosource.worker.js
@@ -19,23 +19,19 @@ var ctx = canvas.getContext('2d');
 
 ctx.fillStyle = '#0f0';
 ctx.fillRect(0, 0, 100, 50);
-var promise = new Promise(function(resolve, reject) {
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", '/images/green.png');
-    xhr.responseType = 'blob';
-    xhr.send();
-    xhr.onload = function() {
-        resolve(xhr.response);
-    };
-});
-promise.then(function(response) {
-    createImageBitmap(response).then(bitmap => {
-        ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
-        ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
-        _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
-    }, t_fail);
-}).then(t_pass, t_fail);
+const red = async () => await createImageBitmap(await (await fetch("/images/red.png")).blob());
+fetch('/images/red.png')
+  .then(response => response.blob())
+    .then(blob => {
+      createImageBitmap(blob)
+        .then(bitmap => {
+          ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+          ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+          _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);
+      });
+  });
+t.done();
 
 });
 done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/compositing.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/compositing.yaml
index c0b7b83e001..e808206bdab 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/compositing.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/compositing.yaml
@@ -36,19 +36,6 @@
     @assert pixel 50,25 ==~ 2,253,0,255;
   expected: green
 
-- name: 2d.composite.globalAlpha.image
-  images:
-  - red.png
-  canvasType:
-    ['HTMLCanvas']
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    @assert pixel 50,25 ==~ 2,253,0,255;
-  expected: green
-
 - name: 2d.composite.globalAlpha.canvas
   canvasType: ['HTMLCanvas']
   code: |
@@ -66,19 +53,6 @@
     @assert pixel 50,25 ==~ 2,253,0,255;
   expected: green
 
-- name: 2d.composite.globalAlpha.imagepattern
-  images:
-  - red.png
-  canvasType: ['HTMLCanvas']
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.fillStyle = ctx.createPattern(document.getElementById('red.png'), 'no-repeat');
-    ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
-    ctx.fillRect(0, 0, 100, 50);
-    @assert pixel 50,25 ==~ 2,253,0,255;
-  expected: green
-
 - name: 2d.composite.globalAlpha.canvaspattern
   canvasType: ['HTMLCanvas']
   code: |
@@ -181,21 +155,17 @@
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
     ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+
+        createImageBitmap(blob)
+          .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 2,253,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.composite.globalAlpha.canvas
   canvasType: ['OffscreenCanvas']
@@ -215,23 +185,19 @@
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+
+        createImageBitmap(blob)
+          .then(bitmap => {
             ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
             ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
             ctx.fillRect(0, 0, 100, 50);
             @assert pixel 50,25 ==~ 2,253,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.composite.globalAlpha.canvaspattern
   canvasType: ['OffscreenCanvas']
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
index e263bf0253d..4442f1ad481 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/drawing-images-to-the-canvas.yaml
@@ -35,55 +35,6 @@
     @assert pixel 99,49 ==~ 0,255,0,255;
   expected: green
 
-- name: 2d.drawImage.9arg.basic
-  canvasType: ['HTMLCanvas']
-  images:
-  - green.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('green.png'), 0, 0, 100, 50, 0, 0, 100, 50);
-    @assert pixel 0,0 ==~ 0,255,0,255;
-    @assert pixel 99,0 ==~ 0,255,0,255;
-    @assert pixel 0,49 ==~ 0,255,0,255;
-    @assert pixel 99,49 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.9arg.sourcepos
-  canvasType: ['HTMLCanvas']
-  images:
-  - rgrg-256x256.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('rgrg-256x256.png'), 140, 20, 100, 50, 0, 0, 100, 50);
-    @assert pixel 0,0 ==~ 0,255,0,255;
-    @assert pixel 99,0 ==~ 0,255,0,255;
-    @assert pixel 0,49 ==~ 0,255,0,255;
-    @assert pixel 99,49 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.9arg.sourcesize
-  canvasType: ['HTMLCanvas']
-  images:
-  - rgrg-256x256.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('rgrg-256x256.png'), 0, 0, 256, 256, 0, 0, 100, 50);
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 51, 26);
-    ctx.fillRect(49, 24, 51, 26);
-    @assert pixel 0,0 ==~ 0,255,0,255;
-    @assert pixel 99,0 ==~ 0,255,0,255;
-    @assert pixel 0,49 ==~ 0,255,0,255;
-    @assert pixel 99,49 ==~ 0,255,0,255;
-    @assert pixel 20,20 ==~ 0,255,0,255;
-    @assert pixel 80,20 ==~ 0,255,0,255;
-    @assert pixel 20,30 ==~ 0,255,0,255;
-    @assert pixel 80,30 ==~ 0,255,0,255;
-  expected: green
-
 - name: 2d.drawImage.9arg.destpos
   canvasType: ['HTMLCanvas']
   images:
@@ -198,114 +149,6 @@
   code: |
     @assert throws TypeError ctx.drawImage(document.createElement('p'), 0, 0);
 
-- name: 2d.drawImage.floatsource
-  canvasType: ['HTMLCanvas']
-  images:
-  - green.png
-  code: |
-    ctx.drawImage(document.getElementById('green.png'), 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.zerosource
-  desc: drawImage with zero-sized source rectangle draws nothing without exception
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red.png'), 10, 10, 0, 1, 0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red.png'), 10, 10, 1, 0, 0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red.png'), 10, 10, 0, 0, 0, 0, 100, 50);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.zerosource.image
-  desc: drawImage with zero-sized source rectangle from image draws nothing without exception
-  canvasType: ['HTMLCanvas']
-  images:
-  - red-zerowidth.svg
-  - red-zeroheight.svg
-  - red-zerosize.svg
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red-zerowidth.svg'), 0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red-zeroheight.svg'), 0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red-zerosize.svg'), 0, 0, 100, 50);
-    @assert pixel 50,25 == 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.negativesource
-  desc: Negative source width/height represents the correct rectangle
-  canvasType: ['HTMLCanvas']
-  mozilla: {throws: !!null ''}
-  images:
-  - ggrr-256x256.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 78, -100, 50, 0, 0, 50, 50);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 128, -100, -50, 50, 0, 50, 50);
-    @assert pixel 1,1 ==~ 0,255,0,255;
-    @assert pixel 1,48 ==~ 0,255,0,255;
-    @assert pixel 98,1 ==~ 0,255,0,255;
-    @assert pixel 98,48 ==~ 0,255,0,255;
-    @assert pixel 48,1 ==~ 0,255,0,255;
-    @assert pixel 48,48 ==~ 0,255,0,255;
-    @assert pixel 51,1 ==~ 0,255,0,255;
-    @assert pixel 51,48 ==~ 0,255,0,255;
-    @assert pixel 25,25 ==~ 0,255,0,255;
-    @assert pixel 75,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.negativedest
-  desc: Negative destination width/height represents the correct rectangle
-  canvasType: ['HTMLCanvas']
-  mozilla: {throws: !!null ''}
-  images:
-  - ggrr-256x256.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 78, 50, 50, 0, 50, 50, -50);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 100, 128, 50, -50, 100, 50, -50, -50);
-    @assert pixel 1,1 ==~ 0,255,0,255;
-    @assert pixel 1,48 ==~ 0,255,0,255;
-    @assert pixel 98,1 ==~ 0,255,0,255;
-    @assert pixel 98,48 ==~ 0,255,0,255;
-    @assert pixel 48,1 ==~ 0,255,0,255;
-    @assert pixel 48,48 ==~ 0,255,0,255;
-    @assert pixel 51,1 ==~ 0,255,0,255;
-    @assert pixel 51,48 ==~ 0,255,0,255;
-    @assert pixel 25,25 ==~ 0,255,0,255;
-    @assert pixel 75,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.negativedir
-  desc: Negative dimensions do not affect the direction of the image
-  canvasType: ['HTMLCanvas']
-  mozilla: {throws: !!null ''}
-  images:
-  - ggrr-256x256.png
-  code: |
-    ctx.fillStyle = '#f00';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 0, 178, 50, -100, 0, 0, 50, 100);
-    ctx.drawImage(document.getElementById('ggrr-256x256.png'), 0, 78, 50, 100, 50, 100, 50, -100);
-    @assert pixel 1,1 ==~ 0,255,0,255;
-    @assert pixel 1,48 ==~ 0,255,0,255;
-    @assert pixel 98,1 ==~ 0,255,0,255;
-    @assert pixel 98,48 ==~ 0,255,0,255;
-    @assert pixel 48,1 ==~ 0,255,0,255;
-    @assert pixel 48,48 ==~ 0,255,0,255;
-    @assert pixel 51,1 ==~ 0,255,0,255;
-    @assert pixel 51,48 ==~ 0,255,0,255;
-    @assert pixel 25,25 ==~ 0,255,0,255;
-    @assert pixel 75,25 ==~ 0,255,0,255;
-  expected: green
-
 - name: 2d.drawImage.outsidesource
   DISABLED: fix this to match the current spec (transparent black outside source)
   canvasType: ['HTMLCanvas']
@@ -403,17 +246,6 @@
     @assert pixel 50,25 ==~ 0,255,0,255;
   expected: green
 
-- name: 2d.drawImage.broken
-  canvasType: ['HTMLCanvas']
-  images:
-  - broken.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    var img = document.getElementById('broken.png');
-    @assert throws INVALID_STATE_ERR ctx.drawImage(img, 0, 0);
-  expected: green
-
 - name: 2d.drawImage.nonexistent
   canvasType: ['HTMLCanvas']
   images:
@@ -439,16 +271,6 @@
     canvas2.height = 0;
     @assert throws INVALID_STATE_ERR ctx.drawImage(canvas2, 0, 0);
 
-- name: 2d.drawImage.svg
-  desc: drawImage() of an SVG image
-  canvasType: ['HTMLCanvas']
-  images:
-  - green.svg
-  code: |
-    ctx.drawImage(document.getElementById('green.svg'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
 - name: 2d.drawImage.animated.gif
   desc: drawImage() of an animated GIF draws the first frame
   canvasType: ['HTMLCanvas']
@@ -475,108 +297,8 @@
     }), 500);
   expected: green
 
-- name: 2d.drawImage.animated.poster
-  desc: drawImage() of an APNG draws the poster frame
-  canvasType: ['HTMLCanvas']
-  images:
-  - anim-poster-gr.png
-  code: |
-    ctx.drawImage(document.getElementById('anim-poster-gr.png'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255; @moz-todo
-  expected: green
-
-- name: 2d.drawImage.path
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.rect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    ctx.fill();
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.transform
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.translate(100, 0);
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
 # TODO: drawImage shadows
 
-- name: 2d.drawImage.alpha
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.globalAlpha = 0;
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.clip
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.rect(-10, -10, 1, 1);
-    ctx.clip();
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.composite
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.globalCompositeOperation = 'destination-over';
-    ctx.drawImage(document.getElementById('red.png'), 0, 0);
-    @assert pixel 50,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.nowrap
-  desc: Stretched images do not get pixels wrapping around the edges
-  canvasType: ['HTMLCanvas']
-  images:
-  - redtransparent.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    ctx.drawImage(document.getElementById('redtransparent.png'), -1950, 0, 2000, 50);
-    @assert pixel 45,25 ==~ 0,255,0,255;
-    @assert pixel 50,25 ==~ 0,255,0,255;
-    @assert pixel 55,25 ==~ 0,255,0,255;
-  expected: green
-
-- name: 2d.drawImage.nonfinite
-  desc: drawImage() with Infinity/NaN is ignored
-  canvasType: ['HTMLCanvas']
-  images:
-  - red.png
-  code: |
-    ctx.fillStyle = '#0f0';
-    ctx.fillRect(0, 0, 100, 50);
-    var red = document.getElementById('red.png');
-    @nonfinite ctx.drawImage(<red>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>);
-    @nonfinite ctx.drawImage(<red>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>);
-    @nonfinite ctx.drawImage(<red>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>);
-    @assert pixel 50,25 == 0,255,0,255;
-  expected: green
-
 - name: 2d.drawImage.3arg
   canvasType: ['OffscreenCanvas']
   timeout: long
@@ -661,78 +383,59 @@
     }).then(t_pass, t_fail);
 
 - name: 2d.drawImage.9arg.basic
-  canvasType: ['OffscreenCanvas']
   images:
   - green.png
   timeout: long
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/green.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/green.png')
+      .then(response => response.blob())
+        .then(blob => {
+        createImageBitmap(blob)
+          .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0, 100, 50, 0, 0, 100, 50);
             @assert pixel 0,0 ==~ 0,255,0,255;
             @assert pixel 99,0 ==~ 0,255,0,255;
             @assert pixel 0,49 ==~ 0,255,0,255;
             @assert pixel 99,49 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.9arg.sourcepos
-  canvasType: ['OffscreenCanvas']
   images:
   - rgrg-256x256.png
   timeout: long
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/rgrg-256x256.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/rgrg-256x256.png')
+      .then(response => response.blob())
+        .then(blob => {
+        createImageBitmap(blob)
+          .then(bitmap => {
             ctx.drawImage(bitmap, 140, 20, 100, 50, 0, 0, 100, 50);
             @assert pixel 0,0 ==~ 0,255,0,255;
             @assert pixel 99,0 ==~ 0,255,0,255;
             @assert pixel 0,49 ==~ 0,255,0,255;
             @assert pixel 99,49 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.9arg.sourcesize
-  canvasType: ['OffscreenCanvas']
   images:
   - rgrg-256x256.png
   timeout: long
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/rgrg-256x256.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/rgrg-256x256.png')
+      .then(response => response.blob())
+        .then(blob => {
+        createImageBitmap(blob)
+          .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0, 256, 256, 0, 0, 100, 50);
             ctx.fillStyle = '#0f0';
             ctx.fillRect(0, 0, 51, 26);
@@ -745,8 +448,9 @@
             @assert pixel 80,20 ==~ 0,255,0,255;
             @assert pixel 20,30 ==~ 0,255,0,255;
             @assert pixel 80,30 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.9arg.destpos
   canvasType: ['OffscreenCanvas']
@@ -865,55 +569,43 @@
     @assert throws INVALID_STATE_ERR ctx.drawImage(offscreenCanvas2, 0, 0);
 
 - name: 2d.drawImage.floatsource
-  canvasType: ['OffscreenCanvas']
   timeout: long
   code: |
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/green.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
+              ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
+              @assert pixel 50,25 ==~ 0,255,0,255;
+        });
     });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
-            ctx.drawImage(bitmap, 10.1, 10.1, 0.1, 0.1, 0, 0, 100, 50);
-            @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+  Expected: green
 
 - name: 2d.drawImage.zerosource
   desc: drawImage with zero-sized source rectangle draws nothing without exception
-  canvasType: ['OffscreenCanvas']
   timeout: long
   images:
   - red.png
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/green.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
-            ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
-            ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
-            ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
-            @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+    const red = async () => await createImageBitmap(await (await fetch("/images/red.png")).blob());
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
+              ctx.drawImage(bitmap, 10, 10, 0, 1, 0, 0, 100, 50);
+              ctx.drawImage(bitmap, 10, 10, 1, 0, 0, 0, 100, 50);
+              ctx.drawImage(bitmap, 10, 10, 0, 0, 0, 0, 100, 50);
+              @assert pixel 50,25 ==~ 0,255,0,255;
+          });
+      });
+  expected: green
 
 - name: 2d.drawImage.zerosource.image
   desc: drawImage with zero-sized source rectangle from image draws nothing without exception
-  canvasType: ['OffscreenCanvas']
   images:
   - red-zerowidth.svg
   - red-zeroheight.svg
@@ -922,27 +614,21 @@
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red-zerowidth.svg');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
+    fetch('/images/red-zerowidth.svg')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
+              ctx.drawImage(bitmap, 0, 0, 100, 50);
+              ctx.drawImage(bitmap, 0, 0, 100, 50);
+              ctx.drawImage(bitmap, 0, 0, 100, 50);
+              @assert pixel 50,25 == 0,255,0,255;
+          });
     });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
-            ctx.drawImage(bitmap, 0, 0, 100, 50);
-            ctx.drawImage(bitmap, 0, 0, 100, 50);
-            ctx.drawImage(bitmap, 0, 0, 100, 50);
-            @assert pixel 50,25 == 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+  expected: green
 
 - name: 2d.drawImage.negativesource
   desc: Negative source width/height represents the correct rectangle
-  canvasType: ['OffscreenCanvas']
   mozilla: {throws: !!null ''}
   images:
   - ggrr-256x256.png
@@ -950,17 +636,11 @@
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/ggrr-256x256.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/ggrr-256x256.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 100, 78, -100, 50, 0, 0, 50, 50);
             ctx.drawImage(bitmap, 100, 128, -100, -50, 50, 0, 50, 50);
             @assert pixel 1,1 ==~ 0,255,0,255;
@@ -973,12 +653,12 @@
             @assert pixel 51,48 ==~ 0,255,0,255;
             @assert pixel 25,25 ==~ 0,255,0,255;
             @assert pixel 75,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.negativedest
   desc: Negative destination width/height represents the correct rectangle
-  canvasType: ['OffscreenCanvas']
   mozilla: {throws: !!null ''}
   timeout: long
   images:
@@ -986,17 +666,11 @@
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/ggrr-256x256.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/ggrr-256x256.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 100, 78, 50, 50, 0, 50, 50, -50);
             ctx.drawImage(bitmap, 100, 128, 50, -50, 100, 50, -50, -50);
             @assert pixel 1,1 ==~ 0,255,0,255;
@@ -1009,12 +683,12 @@
             @assert pixel 51,48 ==~ 0,255,0,255;
             @assert pixel 25,25 ==~ 0,255,0,255;
             @assert pixel 75,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.negativedir
   desc: Negative dimensions do not affect the direction of the image
-  canvasType: ['OffscreenCanvas']
   mozilla: {throws: !!null ''}
   timeout: long
   images:
@@ -1022,17 +696,11 @@
   code: |
     ctx.fillStyle = '#f00';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/ggrr-256x256.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/ggrr-256x256.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100);
             ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100);
             @assert pixel 1,1 ==~ 0,255,0,255;
@@ -1045,8 +713,9 @@
             @assert pixel 51,48 ==~ 0,255,0,255;
             @assert pixel 25,25 ==~ 0,255,0,255;
             @assert pixel 75,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.outsidesource
   DISABLED: fix this to match the current spec (transparent black outside source)
@@ -1086,100 +755,76 @@
             @assert throws INDEX_SIZE_ERR ctx.drawImage(bitmap1, 0, 0, 5, -5, 0, 0, 100, 50);
             @assert throws INDEX_SIZE_ERR ctx.drawImage(bitmap1, 110, 60, -20, -20, 0, 0, 100, 50);
             @assert pixel 50,25 ==~ 0,255,0,255; @moz-todo
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.broken
-  canvasType: ['OffscreenCanvas']
   timeout: long
   code: |
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/broken.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/broken.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.fillStyle = '#0f0';
             ctx.fillRect(0, 0, 100, 50);
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255; @moz-todo
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.svg
   desc: drawImage() of an SVG image
-  canvasType: ['OffscreenCanvas']
   timeout: long
   code: |
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/green.svg');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/green.svg')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.animated.poster
   desc: drawImage() of an APNG draws the poster frame
-  canvasType: ['OffscreenCanvas']
   images:
   - anim-poster-gr.png
   timeout: long
   code: |
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/anim-poster-gr.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('anim-poster-gr.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255; @moz-todo
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.path
-  canvasType: ['OffscreenCanvas']
   timeout: long
   code: |
     ctx.fillStyle = '#0f0';
     ctx.rect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             ctx.fill();
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.transform
-  canvasType: ['OffscreenCanvas']
   images:
   - red.png
   timeout: long
@@ -1187,24 +832,18 @@
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
     ctx.translate(100, 0);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.alpha
-  canvasType: ['OffscreenCanvas']
   images:
   - red.png
   timeout: long
@@ -1212,24 +851,18 @@
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
     ctx.globalAlpha = 0;
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.clip
-  canvasType: ['OffscreenCanvas']
   images:
   - red.png
   timeout: long
@@ -1238,24 +871,22 @@
     ctx.fillRect(0, 0, 100, 50);
     ctx.rect(-10, -10, 1, 1);
     ctx.clip();
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
-            ctx.drawImage(bitmap, 0, 0);
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
+            ctx.fillStyle = '#0f0';
+            ctx.fillRect(0, 0, 100, 50);
+            ctx.rect(-10, -10, 1, 1);
+            ctx.clip();
+            ctx.drawImage(document.getElementById('red.png'), 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.composite
-  canvasType: ['OffscreenCanvas']
   images:
   - red.png
   timeout: long
@@ -1263,72 +894,55 @@
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
     ctx.globalCompositeOperation = 'destination-over';
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/red.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/red.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, 0, 0);
             @assert pixel 50,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.nowrap
   desc: Stretched images do not get pixels wrapping around the edges
-  canvasType: ['OffscreenCanvas']
   images:
   - redtransparent.png
   timeout: long
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/redtransparent.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/redtransparent.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             ctx.drawImage(bitmap, -1950, 0, 2000, 50);
             @assert pixel 45,25 ==~ 0,255,0,255;
             @assert pixel 50,25 ==~ 0,255,0,255;
             @assert pixel 55,25 ==~ 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
 
 - name: 2d.drawImage.nonfinite
   desc: drawImage() with Infinity/NaN is ignored
-  canvasType: ['OffscreenCanvas']
   images:
   - red.png
   timeout: long
   code: |
     ctx.fillStyle = '#0f0';
     ctx.fillRect(0, 0, 100, 50);
-    var promise = new Promise(function(resolve, reject) {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", '/images/redtransparent.png');
-        xhr.responseType = 'blob';
-        xhr.send();
-        xhr.onload = function() {
-            resolve(xhr.response);
-        };
-    });
-    promise.then(function(response) {
-        createImageBitmap(response).then(bitmap => {
+    fetch('/images/redtransparent.png')
+      .then(response => response.blob())
+        .then(blob => {
+          createImageBitmap(blob)
+            .then(bitmap => {
             @nonfinite ctx.drawImage(<bitmap>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>);
             @nonfinite ctx.drawImage(<bitmap>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>);
             @nonfinite ctx.drawImage(<bitmap>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <0 Infinity -Infinity NaN>, <100 Infinity -Infinity NaN>, <50 Infinity -Infinity NaN>);
             @assert pixel 50,25 == 0,255,0,255;
-        }, t_fail);
-    }).then(t_pass, t_fail);
+        });
+    });
+  expected: green
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html
new file mode 100644
index 00000000000..bf58630816a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-value-option.tentative.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel=help href="https://github.com/openui/open-ui/issues/664">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<selectmenu id=selectmenu>
+  <option id=optone>innertext one</option>
+  <option id=opttwo value=valueattribute>innertext two</option>
+</selectmenu>
+
+<script>
+test(() => {
+  assert_equals(selectmenu.value, 'innertext one',
+    'The first option should be selected initially.');
+  selectmenu.value = 'valueattribute';
+  assert_equals(selectmenu.value, 'valueattribute',
+    'Assigning value should look at the options value, not innertext');
+}, 'selectmenu.value should reflect option.value');
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-target-element-disabled.html b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-target-element-disabled.html
index 92c28a4b6c5..59392f428ae 100644
--- a/tests/wpt/web-platform-tests/html/semantics/popovers/popover-target-element-disabled.html
+++ b/tests/wpt/web-platform-tests/html/semantics/popovers/popover-target-element-disabled.html
@@ -124,3 +124,53 @@ test(() => {
     'The outer popover be should be closed when the hierarchy is broken.');
 }, 'Disconnecting popover*target buttons when popovers are open should close all popovers.');
 </script>
+
+<div id=outerpopover7 popover=auto>
+  <button id=togglebutton7 popovertarget=innerpopover7>toggle popover</button>
+</div>
+<div id=innerpopover7 popover=auto>popover</div>
+<script>
+test(() => {
+  outerpopover7.showPopover();
+  innerpopover7.showPopover();
+  assert_true(innerpopover7.matches(':open'),
+    'The inner popover should be able to open successfully.');
+  assert_true(outerpopover7.matches(':open'),
+    'The outer popover should stay open when opening the inner one.');
+
+  togglebutton7.setAttribute('popovertarget', 'otherpopover7');
+  assert_false(innerpopover7.matches(':open'),
+    'The inner popover be should be closed when the hierarchy is broken.');
+  assert_false(outerpopover7.matches(':open'),
+    'The outer popover be should be closed when the hierarchy is broken.');
+}, 'Changing the popovertarget attribute to break the chain should close all popovers.');
+</script>
+
+<div id=outerpopover8 popover=auto>
+  <div id=middlepopover8 popover=auto>
+    <div id=innerpopover8 popover=auto>hello</div>
+  </div>
+</div>
+<div id=otherpopover8 popover=auto>other popover</div>
+<button id=togglebutton8 popovertarget=middlepopover8>other button</div>
+<script>
+test(() => {
+  outerpopover8.showPopover();
+  middlepopover8.showPopover();
+  innerpopover8.showPopover();
+  assert_true(innerpopover8.matches(':open'),
+    'The inner popover should be able to open successfully.');
+  assert_true(middlepopover8.matches(':open'),
+    'The middle popover should stay open when opening the inner one.');
+  assert_true(outerpopover8.matches(':open'),
+    'The outer popover should stay open when opening the inner one.');
+
+  togglebutton8.setAttribute('popovertarget', 'otherpopover8');
+  assert_true(innerpopover8.matches(':open'),
+    'The inner popover should remain open.');
+  assert_true(middlepopover8.matches(':open'),
+    'The middle popover should remain open.');
+  assert_true(outerpopover8.matches(':open'),
+    'The outer popover should remain open.');
+}, `Modifying popovertarget on a button which doesn't break the chain shouldn't close any popovers.`);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/tools/update_html5lib_tests.py b/tests/wpt/web-platform-tests/html/tools/update_html5lib_tests.py
index f1a99416fc8..7ad9bc6f862 100644
--- a/tests/wpt/web-platform-tests/html/tools/update_html5lib_tests.py
+++ b/tests/wpt/web-platform-tests/html/tools/update_html5lib_tests.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import glob
 import hashlib
 import itertools
diff --git a/tests/wpt/web-platform-tests/infrastructure/assumptions/tools/ahem-generate-table.py b/tests/wpt/web-platform-tests/infrastructure/assumptions/tools/ahem-generate-table.py
index 8790da02e27..314279f6710 100644
--- a/tests/wpt/web-platform-tests/infrastructure/assumptions/tools/ahem-generate-table.py
+++ b/tests/wpt/web-platform-tests/infrastructure/assumptions/tools/ahem-generate-table.py
@@ -1,5 +1,3 @@
-from __future__ import print_function, unicode_literals
-
 import itertools
 import unicodedata
 
diff --git a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-event-listener.html b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-event-listener.html
index 6349c28b320..f866a1dfd83 100644
--- a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-event-listener.html
+++ b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-event-listener.html
@@ -17,9 +17,20 @@ test_self_event_listener(t => {
     img.addEventListener("load", () => {
         busy_wait();
     });
+    img.id = "image";
     document.body.appendChild(img);
     t.add_cleanup(() => img.remove());
-}, "IMG.onload");
+}, "IMG#image.onload");
+
+test_self_event_listener(t => {
+    const img = document.createElement("img");
+    img.src = "/images/green.png";
+    img.addEventListener("load", () => {
+        busy_wait();
+    });
+    document.body.appendChild(img);
+    t.add_cleanup(() => img.remove());
+}, "IMG[src=/images/green.png].onload");
 
 test_self_event_listener(t => {
     const xhr = new XMLHttpRequest();
diff --git a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-first-ui-event.html b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-first-ui-event.html
index f2d8dac3f11..b30b645d2fa 100644
--- a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-first-ui-event.html
+++ b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-first-ui-event.html
@@ -91,7 +91,7 @@ promise_test(async t => {
     document.body.appendChild(img);
     t.add_cleanup(() => img.remove());
     return promise;
-  }, s => s.name === "IMG.onload", t);
+  }, s => s.name === "IMG[src=/images/green.png].onload", t);
 
   const [entry] = await entryPromise;
   assert_equals(entry.firstUIEventTimestamp, 0);
diff --git a/tests/wpt/web-platform-tests/png/cicp-chunk.html b/tests/wpt/web-platform-tests/png/cicp-chunk.html
index 4afc262dcf5..8add5d602ea 100644
--- a/tests/wpt/web-platform-tests/png/cicp-chunk.html
+++ b/tests/wpt/web-platform-tests/png/cicp-chunk.html
@@ -36,5 +36,5 @@ img.onload = () => {
     assert_approx_equals(pixel[3], pixel_expected[3], epsilon);
   }, {colorSpace: "display-p3"});
 };
-img.src = "./images/cicp.png";
+img.src = "support/cicp-display-p3.png";
 </script>
diff --git a/tests/wpt/web-platform-tests/images/cicp.png b/tests/wpt/web-platform-tests/png/support/cicp-display-p3.png
similarity index 100%
rename from tests/wpt/web-platform-tests/images/cicp.png
rename to tests/wpt/web-platform-tests/png/support/cicp-display-p3.png
diff --git a/tests/wpt/web-platform-tests/images/trns.png b/tests/wpt/web-platform-tests/png/support/trns-high-bits-set.png
similarity index 100%
rename from tests/wpt/web-platform-tests/images/trns.png
rename to tests/wpt/web-platform-tests/png/support/trns-high-bits-set.png
diff --git a/tests/wpt/web-platform-tests/png/trns-chunk.html b/tests/wpt/web-platform-tests/png/trns-chunk.html
index 652cda0e320..3a24753382b 100644
--- a/tests/wpt/web-platform-tests/png/trns-chunk.html
+++ b/tests/wpt/web-platform-tests/png/trns-chunk.html
@@ -33,5 +33,5 @@ img.onload = () => {
     assert_approx_equals(pixel[3], pixel_expected[3], epsilon);
   });
 };
-img.src = "../images/trns.png";
+img.src = "support/trns-high-bits-set.png";
 </script>
diff --git a/tests/wpt/web-platform-tests/scheduler/tentative/yield/yield-priority-idle-callbacks.html b/tests/wpt/web-platform-tests/scheduler/tentative/yield/yield-priority-idle-callbacks.html
new file mode 100644
index 00000000000..d47e8c5eba2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scheduler/tentative/yield/yield-priority-idle-callbacks.html
@@ -0,0 +1,60 @@
+<!doctype html>
+<title>Scheduler: yield inheritance in requestIdleCallback</title>
+<link rel="help" href="https://github.com/WICG/scheduling-apis">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+'use strict';
+
+// Queues a requestIdleCallback that schedules 2 user-visible tasks, 2
+// background tasks, another requestIdleCallback, and then yields 3 times using
+// `yieldParams`.
+//
+// Returns {tasks, ids} where `tasks` is an array of promises associated with
+// the tasks and `ids` is an array of task ids appended to by the scheduled
+// tasks.
+function postTestTasks(yieldParams) {
+  const ids = [];
+  const task = new Promise(resolve => {
+    requestIdleCallback(async () => {
+      ids.push('i1');
+
+      const subtasks = [];
+      subtasks.push(scheduler.postTask(() => { ids.push('uv1'); }));
+      subtasks.push(scheduler.postTask(() => { ids.push('uv2'); }));
+      subtasks.push(scheduler.postTask(() => { ids.push('bg1'); }, {priority: 'background'}));
+      subtasks.push(scheduler.postTask(() => { ids.push('bg2'); }, {priority: 'background'}));
+      subtasks.push(new Promise(resolve => {
+        requestIdleCallback(() => {
+          ids.push('i2');
+          resolve();
+        });
+      }));
+
+      for (let i = 1; i <= 3; i++) {
+        await scheduler.yield(yieldParams);
+        ids.push('y' + i);
+      }
+      await Promise.all(subtasks);
+      resolve();
+    });
+  });
+  return {task, ids};
+}
+
+const expected_inherited_task_order = 'i1,uv1,uv2,y1,y2,y3,bg1,bg2,i2';
+
+promise_test(async t => {
+  const {task, ids} = postTestTasks({priority: "inherit"});
+  await task;
+  assert_equals(ids.join(), expected_inherited_task_order);
+}, 'requestIdleCallback() yields at background priority when inheriting priority');
+
+promise_test(async t => {
+  const {task, ids} = postTestTasks({signal: "inherit"});
+  await task;
+  assert_equals(ids.join(), expected_inherited_task_order);
+}, 'requestIdleCallback() yields at background priority when inheriting signal');
+
+</script>
diff --git a/tests/wpt/web-platform-tests/service-workers/cache-storage/cache-storage-buckets.https.any.js b/tests/wpt/web-platform-tests/service-workers/cache-storage/cache-storage-buckets.https.any.js
index 0b5ef7b298d..fd59ba464db 100644
--- a/tests/wpt/web-platform-tests/service-workers/cache-storage/cache-storage-buckets.https.any.js
+++ b/tests/wpt/web-platform-tests/service-workers/cache-storage/cache-storage-buckets.https.any.js
@@ -1,7 +1,8 @@
 // META: title=Cache.put
 // META: global=window,worker
 // META: script=/common/get-host-info.sub.js
-// META: script=./resources/test-helpers.js
+// META: script=resources/test-helpers.js
+// META: script=/storage/buckets/resources/util.js
 // META: timeout=long
 
 var test_url = 'https://example.com/foo';
@@ -9,14 +10,10 @@ var test_body = 'Hello world!';
 const { REMOTE_HOST } = get_host_info();
 
 promise_test(async function(test) {
+  await prepareForBucketTest(test);
   var inboxBucket = await navigator.storageBuckets.open('inbox');
   var draftsBucket = await navigator.storageBuckets.open('drafts');
 
-  test.add_cleanup(async function() {
-    await navigator.storageBuckets.delete('inbox');
-    await navigator.storageBuckets.delete('drafts');
-  });
-
   const cacheName = 'attachments';
   const cacheKey = 'receipt1.txt';
 
@@ -43,14 +40,10 @@ promise_test(async function(test) {
 }, 'caches from different buckets have different contents');
 
 promise_test(async function(test) {
+  await prepareForBucketTest(test);
   var inboxBucket = await navigator.storageBuckets.open('inbox');
   var draftBucket = await navigator.storageBuckets.open('drafts');
 
-  test.add_cleanup(async function() {
-    await navigator.storageBuckets.delete('inbox');
-    await navigator.storageBuckets.delete('drafts');
-  });
-
   var caches = inboxBucket.caches;
   var attachments = await caches.open('attachments');
   await attachments.put('receipt1.txt', new Response('bread x 2'));
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prerender/resources/presentation-request.html b/tests/wpt/web-platform-tests/speculation-rules/prerender/resources/presentation-request.html
index 62829556bb4..18475a3d67f 100644
--- a/tests/wpt/web-platform-tests/speculation-rules/prerender/resources/presentation-request.html
+++ b/tests/wpt/web-platform-tests/speculation-rules/prerender/resources/presentation-request.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="utils.js"></script>
 <script>
 
 assert_true(document.prerendering);
diff --git a/tests/wpt/web-platform-tests/speech-api/SpeechSynthesisEvent-properties.html b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesisEvent-properties.html
new file mode 100644
index 00000000000..f6c8f5fc321
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speech-api/SpeechSynthesisEvent-properties.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<title>Properties of SpeechSynthesisEvent</title>
+<link rel="help" href="https://wicg.github.io/speech-api/#utterance-events">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<body>
+<script>
+// Written for https://github.com/WICG/speech-api/issues/103
+promise_test(async (t) => {
+  const utterance = new SpeechSynthesisUtterance('test');
+  const eventWatcher = new EventWatcher(t, utterance, ['start', 'end', 'error']);
+  await test_driver.bless('speechSynthesis.speak',
+      () => { speechSynthesis.speak(utterance) });
+  const events = await eventWatcher.wait_for(['start', 'end'], { record: 'all' });
+  assert_equals(events.length, 2, 'number of events');
+  for (const event of events) {
+    assert_true(event instanceof SpeechSynthesisEvent, 'is SpeechSynthesisEvent');
+    assert_false(event.bubbles, 'bubbles');
+    assert_false(event.cancelable, 'cancelable');
+    assert_equals(event.utterance, utterance, 'utterance');
+  }
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js b/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
index 82794061bd0..f0aadf4828d 100644
--- a/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
+++ b/tests/wpt/web-platform-tests/storage-access-api/storage-access-permission.sub.https.window.js
@@ -4,16 +4,17 @@
 'use strict';
 
 (async function() {
-  // This is cross-domain from the current document.
+  // These are cross-domain from the current document.
   const wwwAlt = "https://{{hosts[alt][www]}}:{{ports[https][0]}}";
+  const www1Alt = "https://{{hosts[alt][www1]}}:{{ports[https][0]}}";
+  const responder_html = "/storage-access-api/resources/script-with-cookie-header.py?script=embedded_responder.js";
 
   if (window === window.top) {
     // Test the interaction between two (same-origin) iframes.
     promise_test(async (t) => {
-      const responder_html = `${wwwAlt}/storage-access-api/resources/script-with-cookie-header.py?script=embedded_responder.js`;
       const [frame1, frame2] = await Promise.all([
-        CreateFrame(responder_html),
-        CreateFrame(responder_html),
+        CreateFrame(wwwAlt + responder_html),
+        CreateFrame(wwwAlt + responder_html),
       ]);
 
       t.add_cleanup(async () => {
@@ -27,6 +28,24 @@
       assert_equals(state, "granted");
     }, "Permissions grants are observable across same-origin iframes");
 
+    // Test the interaction between two cross-origin but same-site iframes.
+    promise_test(async (t) => {
+      const [frame1, frame2] = await Promise.all([
+        CreateFrame(wwwAlt + responder_html),
+        CreateFrame(www1Alt + responder_html),
+      ]);
+
+      t.add_cleanup(async () => {
+        await SetPermissionInFrame(frame1, [{ name: 'storage-access' }, 'prompt']);
+      });
+
+      const observed = ObservePermissionChange(frame2);
+      await SetPermissionInFrame(frame1, [{ name: 'storage-access' }, 'granted']);
+
+      const state = await observed;
+      assert_equals(state, "granted");
+    }, "Permissions grants are observable across same-site iframes");
+
     promise_test(async (t) => {
       // Finally run the simple tests below in a separate cross-origin iframe.
       await RunTestsInIFrame('https://{{domains[www]}}:{{ports[https][0]}}/storage-access-api/resources/permissions-iframe.https.html');
diff --git a/tests/wpt/web-platform-tests/storage/buckets/buckets_storage_policy.tentative.https.any.js b/tests/wpt/web-platform-tests/storage/buckets/buckets_storage_policy.tentative.https.any.js
index 4aaa02e4be4..d6dce3675d0 100644
--- a/tests/wpt/web-platform-tests/storage/buckets/buckets_storage_policy.tentative.https.any.js
+++ b/tests/wpt/web-platform-tests/storage/buckets/buckets_storage_policy.tentative.https.any.js
@@ -1,15 +1,11 @@
 // META: title=Buckets API: Tests for bucket storage policies.
+// META: script=/storage/buckets/resources/util.js
 // META: global=window,worker
 
 'use strict';
 
 promise_test(async testCase => {
-  testCase.add_cleanup(async () => {
-    const bucketNames = await navigator.storageBuckets.keys();
-    for (const bucketName of bucketNames) {
-      await navigator.storageBuckets.delete(bucketName);
-    }
-  });
+  await prepareForBucketTest(testCase);
 
   await promise_rejects_js(
       testCase, TypeError,
diff --git a/tests/wpt/web-platform-tests/storage/buckets/resources/util.js b/tests/wpt/web-platform-tests/storage/buckets/resources/util.js
new file mode 100644
index 00000000000..50abce14cdc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/storage/buckets/resources/util.js
@@ -0,0 +1,15 @@
+'use strict';
+
+// Makes sure initial bucket state is as expected and to clean up after the test
+// is over (whether it passes or fails).
+async function prepareForBucketTest(test) {
+  // Verify initial state.
+  assert_equals('', (await navigator.storageBuckets.keys()).join());
+  // Clean up after test.
+  test.add_cleanup(async function() {
+    const keys = await navigator.storageBuckets.keys();
+    for (const key of keys) {
+      await navigator.storageBuckets.delete(key);
+    }
+  });
+}
diff --git a/tests/wpt/web-platform-tests/streams/piping/general.any.js b/tests/wpt/web-platform-tests/streams/piping/general.any.js
index bec3480f653..faeb8e321af 100644
--- a/tests/wpt/web-platform-tests/streams/piping/general.any.js
+++ b/tests/wpt/web-platform-tests/streams/piping/general.any.js
@@ -209,3 +209,16 @@ promise_test(t => {
 
   return rs.pipeTo(ws, null);
 }, 'pipeTo() promise should resolve if null is passed');
+
+promise_test(async t => {
+  /** @type {ReadableStreamDefaultController} */
+  var con;
+  let synchronous = false;
+  new ReadableStream({ start(c) { con = c }}, { highWaterMark: 0 }).pipeTo(
+    new WritableStream({ write() { synchronous = true; } })
+  )
+  // wait until start algorithm finishes
+  await Promise.resolve();
+  con.enqueue();
+  assert_false(synchronous, 'write algorithm must not run synchronously');
+}, "enqueue() must not synchronously call write algorithm");
diff --git a/tests/wpt/web-platform-tests/subresource-integrity/tools/generate_javascript.py b/tests/wpt/web-platform-tests/subresource-integrity/tools/generate_javascript.py
index 300e1703b17..fed3e5445fe 100644
--- a/tests/wpt/web-platform-tests/subresource-integrity/tools/generate_javascript.py
+++ b/tests/wpt/web-platform-tests/subresource-integrity/tools/generate_javascript.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 from os import path, listdir
 from hashlib import sha512, sha256, md5
 from base64 import b64encode
diff --git a/tests/wpt/web-platform-tests/subresource-integrity/tools/list_hashes.py b/tests/wpt/web-platform-tests/subresource-integrity/tools/list_hashes.py
index 5f189ce44b2..52f46ffd747 100644
--- a/tests/wpt/web-platform-tests/subresource-integrity/tools/list_hashes.py
+++ b/tests/wpt/web-platform-tests/subresource-integrity/tools/list_hashes.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 from os import path, listdir
 from hashlib import sha512, sha384, sha256, md5
 from base64 import b64encode
diff --git a/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt b/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
index 7189b7b58f9..95753d91681 100644
--- a/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
+++ b/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
@@ -1,4 +1,4 @@
-pygithub==1.56
+pygithub==1.58.1
 pyyaml==6.0
-requests==2.27.1
+requests==2.28.2
 taskcluster==47.0.2
diff --git a/tests/wpt/web-platform-tests/tools/docker/requirements.txt b/tests/wpt/web-platform-tests/tools/docker/requirements.txt
index 06d168a18d2..75dd52bde00 100644
--- a/tests/wpt/web-platform-tests/tools/docker/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/docker/requirements.txt
@@ -1,2 +1,2 @@
 pyyaml==6.0
-requests==2.27.1
+requests==2.28.2
diff --git a/tests/wpt/web-platform-tests/tools/manifest/requirements.txt b/tests/wpt/web-platform-tests/tools/manifest/requirements.txt
index 9f5bc8a143b..0236020bc1f 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/manifest/requirements.txt
@@ -1 +1 @@
-zstandard==0.17.0
+zstandard==0.20.0
diff --git a/tests/wpt/web-platform-tests/tools/requirements_mypy.txt b/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
index af7bf35b21a..48b6fecce53 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
@@ -7,6 +7,6 @@ types-python-dateutil==2.8.19
 types-PyYAML==6.0.12.3
 types-requests==2.28.11.5
 types-setuptools==67.6.0.5
-types-six==1.16.19
+types-six==1.16.21.7
 types-ujson==4.2.1
 typing-extensions==4.1.1
diff --git a/tests/wpt/web-platform-tests/tools/requirements_pytest.txt b/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
index e7678941a7f..a724ff23e51 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
@@ -1,3 +1,3 @@
 pytest==7.0.1
-pytest-cov==3.0.0
+pytest-cov==4.0.0
 hypothesis==6.70.0
diff --git a/tests/wpt/web-platform-tests/tools/requirements_tests.txt b/tests/wpt/web-platform-tests/tools/requirements_tests.txt
index 4d8f2a5d223..27dea42bf5d 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_tests.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_tests.txt
@@ -1,5 +1,5 @@
 httpx[http2]==0.22.0
-json-e==4.4.3
+json-e==4.5.1
 jsonschema==3.2.0
 pyyaml==6.0
 taskcluster==47.0.2
diff --git a/tests/wpt/web-platform-tests/tools/wave/requirements.txt b/tests/wpt/web-platform-tests/tools/wave/requirements.txt
index 5c0369b9f56..f814994b483 100644
--- a/tests/wpt/web-platform-tests/tools/wave/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wave/requirements.txt
@@ -1,2 +1,2 @@
-ua-parser==0.10.0
+ua-parser==0.16.1
 python-dateutil==2.8.2
diff --git a/tests/wpt/web-platform-tests/tools/webtransport/requirements.txt b/tests/wpt/web-platform-tests/tools/webtransport/requirements.txt
index 8743e0317d3..d3b88d7f046 100644
--- a/tests/wpt/web-platform-tests/tools/webtransport/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/webtransport/requirements.txt
@@ -1 +1 @@
-aioquic==0.9.19
+aioquic==0.9.20
diff --git a/tests/wpt/web-platform-tests/tools/wpt/requirements.txt b/tests/wpt/web-platform-tests/tools/wpt/requirements.txt
index a743bbe341f..ba07d192a2d 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wpt/requirements.txt
@@ -1 +1 @@
-requests==2.27.1
+requests==2.28.2
diff --git a/tests/wpt/web-platform-tests/tools/wpt/testfiles.py b/tests/wpt/web-platform-tests/tools/wpt/testfiles.py
index 172ad201fc8..74c97ceefe2 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/testfiles.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/testfiles.py
@@ -35,7 +35,7 @@ if MYPY:
     from typing import Text
     from typing import Tuple
 
-DEFAULT_IGNORE_RULERS = ("resources/testharness*", "resources/testdriver*")
+DEFAULT_IGNORE_RULES = ("resources/testharness*", "resources/testdriver*")
 
 here = os.path.dirname(__file__)
 wpt_root = os.path.abspath(os.path.join(here, os.pardir, os.pardir))
@@ -189,7 +189,7 @@ def repo_files_changed(revish, include_uncommitted=False, include_new=False):
 def exclude_ignored(files, ignore_rules):
     # type: (Iterable[Text], Optional[Sequence[Text]]) -> Tuple[List[Text], List[Text]]
     if ignore_rules is None:
-        ignore_rules = DEFAULT_IGNORE_RULERS
+        ignore_rules = DEFAULT_IGNORE_RULES
     compiled_ignore_rules = [compile_ignore_rule(item) for item in set(ignore_rules)]
 
     changed = []
@@ -362,7 +362,7 @@ def get_parser():
                         "or the end matching anything other than a path separator and ** in that "
                         "position matching anything. This flag can be used multiple times for "
                         "multiple rules. Specifying this flag overrides the default: " +
-                        ", ".join(DEFAULT_IGNORE_RULERS))
+                        ", ".join(DEFAULT_IGNORE_RULES))
     parser.add_argument("--modified", action="store_true",
                         help="Include files under version control that have been "
                         "modified or staged")
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
index 202e8074133..ccf09be728d 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
@@ -4,6 +4,6 @@ mozinfo==1.2.2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1621226
 mozlog==7.1.0
 mozprocess==1.3.0
 pillow==8.4.0
-requests==2.27.1
+requests==2.28.2
 six==1.16.0
 urllib3[secure]==1.26.15
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_chromium.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_chromium.txt
index 8743e0317d3..d3b88d7f046 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_chromium.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_chromium.txt
@@ -1 +1 @@
-aioquic==0.9.19
+aioquic==0.9.20
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_edge.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_edge.txt
index 12920a9956a..dfbdc6d9e34 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_edge.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_edge.txt
@@ -1 +1 @@
-selenium==4.3.0
+selenium==4.8.2
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
index 1f9033c09fe..644df3bfd44 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
@@ -6,4 +6,4 @@ mozleak==0.2
 mozprofile==2.5.0
 mozrunner==8.2.1
 mozversion==2.3.0
-psutil==5.9.1
+psutil==5.9.2
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_ie.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_ie.txt
index 1726afa6079..83948c668e4 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_ie.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_ie.txt
@@ -1,2 +1,2 @@
 mozprocess==1.3.0
-selenium==4.3.0
+selenium==4.8.2
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_opera.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_opera.txt
index 1726afa6079..83948c668e4 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_opera.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_opera.txt
@@ -1,2 +1,2 @@
 mozprocess==1.3.0
-selenium==4.3.0
+selenium==4.8.2
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_safari.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_safari.txt
index 8d303aa4528..e2e2f09f708 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_safari.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_safari.txt
@@ -1 +1 @@
-psutil==5.9.1
+psutil==5.9.2
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_sauce.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_sauce.txt
index 5089b0c1838..64fb1390c04 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_sauce.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_sauce.txt
@@ -1,2 +1,2 @@
-selenium==4.3.0
-requests==2.27.1
+selenium==4.8.2
+requests==2.28.2
diff --git a/tests/wpt/web-platform-tests/web-locks/storage-buckets.tentative.https.any.js b/tests/wpt/web-platform-tests/web-locks/storage-buckets.tentative.https.any.js
index 73cc0ac3725..a6b4f59a95d 100644
--- a/tests/wpt/web-platform-tests/web-locks/storage-buckets.tentative.https.any.js
+++ b/tests/wpt/web-platform-tests/web-locks/storage-buckets.tentative.https.any.js
@@ -1,5 +1,6 @@
 // META: title=Web Locks API: Storage Buckets have independent lock sets
 // META: script=resources/helpers.js
+// META: script=/storage/buckets/resources/util.js
 // META: global=window,dedicatedworker,sharedworker,serviceworker
 
 'use strict';
@@ -26,6 +27,8 @@ async function locksAreShared(t, bucket1, bucket2) {
 }
 
 promise_test(async t => {
+  await prepareForBucketTest(t);
+
   const inboxBucket = await navigator.storageBuckets.open('inbox');
   const draftsBucket = await navigator.storageBuckets.open('drafts');
 
@@ -50,4 +53,4 @@ promise_test(async t => {
   assert_true(
     await self.locksAreShared(t, inboxBucket, inboxBucket2),
     'A two instances of the same non default bucket should share locks with theirselves');
-}, 'Storage buckets have independent locks');
\ No newline at end of file
+}, 'Storage buckets have independent locks');
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/__init__.py
index 6ac8c3394ce..625cd3a6304 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/__init__.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/__init__.py
@@ -66,6 +66,9 @@ def int_interval(start: int, end: int) -> Callable[[Any], None]:
 
     return _
 
+def positive_int(actual: Any) -> None:
+    assert isinstance(actual, int) and actual > 0
+
 
 async def create_console_api_message(bidi_session, context, text):
     await bidi_session.script.call_function(
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/response_started/response_started_cached_tentative.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/response_started/response_started_cached_tentative.py
new file mode 100644
index 00000000000..5022511f792
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/response_started/response_started_cached_tentative.py
@@ -0,0 +1,207 @@
+import pytest
+import random
+
+from tests.support.sync import AsyncPoll
+
+from .. import assert_response_event
+
+PAGE_EMPTY_TEXT = "/webdriver/tests/bidi/network/support/empty.txt"
+
+# The following tests are marked as tentative until
+# https://github.com/w3c/webdriver-bidi/pull/204 is merged.
+
+
+@pytest.mark.asyncio
+async def test_cached(
+    bidi_session,
+    top_context,
+    wait_for_event,
+    url,
+    fetch,
+    setup_network_test,
+):
+    network_events = await setup_network_test(
+        events=[
+            "network.responseStarted",
+        ]
+    )
+    events = network_events["network.responseStarted"]
+
+    cached_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=200&nocache={random.random()}"
+    )
+    on_response_started = wait_for_event("network.responseStarted")
+    await fetch(cached_url)
+    await on_response_started
+
+    assert len(events) == 1
+    expected_request = {"method": "GET", "url": cached_url}
+
+    # The first request/response is used to fill the browser cache, so we expect
+    # fromCache to be False here.
+    expected_response = {
+        "url": cached_url,
+        "fromCache": False,
+        "status": 200,
+    }
+    assert_response_event(
+        events[0],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
+
+    on_response_started = wait_for_event("network.responseStarted")
+    await fetch(cached_url)
+    await on_response_started
+
+    assert len(events) == 2
+
+    # The second request for the same URL has to be read from the local cache.
+    expected_response = {
+        "url": cached_url,
+        "fromCache": True,
+        "status": 200,
+    }
+    assert_response_event(
+        events[1],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
+
+
+@pytest.mark.asyncio
+async def test_cached_redirect(
+    bidi_session,
+    top_context,
+    wait_for_event,
+    url,
+    fetch,
+    setup_network_test,
+):
+    network_events = await setup_network_test(
+        events=[
+            "network.responseStarted",
+        ]
+    )
+    events = network_events["network.responseStarted"]
+
+    text_url = url(PAGE_EMPTY_TEXT)
+    cached_url = url(
+        f"/webdriver/tests/support/http_handlers/cached.py?status=301&location={text_url}&nocache={random.random()}"
+    )
+
+    await fetch(cached_url)
+
+    # Expect two events, one for the initial request and one for the redirect.
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 2)
+    assert len(events) == 2
+
+    # The first request/response is used to fill the cache, so we expect
+    # fromCache to be False here.
+    expected_request = {"method": "GET", "url": cached_url}
+    expected_response = {
+        "url": cached_url,
+        "fromCache": False,
+        "status": 301,
+    }
+    assert_response_event(
+        events[0],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
+
+    # The second request is the redirect
+    redirected_request = {"method": "GET", "url": text_url}
+    redirected_response = {"url": text_url, "status": 200}
+    assert_response_event(
+        events[1],
+        expected_request=redirected_request,
+        expected_response=redirected_response,
+    )
+
+    await fetch(cached_url)
+    wait = AsyncPoll(bidi_session, timeout=2)
+    await wait.until(lambda _: len(events) >= 4)
+    assert len(events) == 4
+
+    # The third request hits cached_url again and has to be read from the local cache.
+    expected_response = {
+        "url": cached_url,
+        "fromCache": True,
+        "status": 301,
+    }
+    assert_response_event(
+        events[2],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
+
+    # The fourth request is the redirect
+    assert_response_event(
+        events[3],
+        expected_request=redirected_request,
+        expected_response=redirected_response,
+    )
+
+
+@pytest.mark.parametrize(
+    "method",
+    [
+        "GET",
+        "HEAD",
+        "OPTIONS",
+    ],
+)
+@pytest.mark.asyncio
+async def test_cached_revalidate(
+    bidi_session, top_context, wait_for_event, url, fetch, setup_network_test, method
+):
+    network_events = await setup_network_test(
+        events=[
+            "network.responseStarted",
+        ]
+    )
+    events = network_events["network.responseStarted"]
+
+    revalidate_url = url(
+        f"/webdriver/tests/support/http_handlers/must-revalidate.py?nocache={random.random()}"
+    )
+    on_response_started = wait_for_event("network.responseStarted")
+    await fetch(revalidate_url, method=method)
+    await on_response_started
+
+    assert len(events) == 1
+    expected_request = {"method": method, "url": revalidate_url}
+    expected_response = {
+        "url": revalidate_url,
+        "fromCache": False,
+        "status": 200,
+    }
+    assert_response_event(
+        events[0],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
+
+    on_response_started = wait_for_event("network.responseStarted")
+
+    # Note that we pass a specific header so that the must-revalidate.py handler
+    # can decide to return a 304 without having to use another URL.
+    await fetch(revalidate_url, method=method, headers={"return-304": "true"})
+    await on_response_started
+
+    assert len(events) == 2
+
+    # Here fromCache should still be false, because for a 304 response the response
+    # cache state is "validated" and fromCache is only true if cache state is "local"
+    expected_response = {
+        "url": revalidate_url,
+        "fromCache": False,
+        "status": 304,
+    }
+    assert_response_event(
+        events[1],
+        expected_request=expected_request,
+        expected_response=expected_response,
+    )
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py b/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
index e79a31448a3..b0c065dca11 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import collections
 import math
 import sys
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/cached.py b/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/cached.py
new file mode 100644
index 00000000000..a43410f8856
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/cached.py
@@ -0,0 +1,14 @@
+def main(request, response):
+    """Simple handler that returns a response with Cache-Control max-age=3600.
+    """
+
+    status = int(request.GET.get(b"status", None))
+    # For redirects, a "location" get parameter can indicate the redirected url
+    if status == 301 and b"location" in request.GET:
+        response.headers.set(b"Location", request.GET.first(b"location"))
+
+    response.status = status
+    response.headers.set(b"Content-Type", "text/plain")
+    response.headers.set(b"Expires", "Thu, 01 Dec 2100 20:00:00 GMT")
+    response.headers.set(b"Cache-Control", "max-age=3600")
+    return "Cached HTTP Response"
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/must-revalidate.py b/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/must-revalidate.py
new file mode 100644
index 00000000000..94f5a795a29
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/http_handlers/must-revalidate.py
@@ -0,0 +1,17 @@
+def main(request, response):
+    """Simple handler that returns a response with Cache-Control max-age=0 and
+    must-revalidate.
+    The request can include a return-304 header to trigger the handler to return
+    a 304 instead of a 200.
+    """
+    response.headers.set(b"Content-Type", "text/plain")
+
+    if b"true" == request.headers.get(b"return-304", None):
+        # instruct the browser that the response was not modified and the cache
+        # can be used.
+        response.status = 304
+        return ""
+    else:
+        response.headers.set(b"Cache-Control", b"max-age=0, must-revalidate")
+        response.status = 200
+        return "must-revalidate HTTP Response"