diff --git a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
index 6a3af4e2ece..947e223fb28 100644
--- a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
@@ -14,9 +14,6 @@
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
-  [Revoke blob URL after calling fetch, fetch should succeed]
-    expected: FAIL
-
 
 [url-with-fetch.any.html]
   [Untitled]
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 74bf491e9e4..ff0f28e988e 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -154883,6 +154883,30 @@
      {}
     ]
    ],
+   "css/css-transforms/individual-transform/translate-fill-box.html": [
+    [
+     "css/css-transforms/individual-transform/translate-fill-box.html",
+     [
+      [
+       "/css/css-transforms/transform-box/reference/greensquare200x200.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-transforms/individual-transform/translate-view-box.html": [
+    [
+     "css/css-transforms/individual-transform/translate-view-box.html",
+     [
+      [
+       "/css/css-transforms/transform-box/reference/greensquare200x200.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-transforms/inline-styles/svg-inline-styles-001.html": [
     [
      "css/css-transforms/inline-styles/svg-inline-styles-001.html",
@@ -321938,6 +321962,12 @@
      {}
     ]
    ],
+   "css/css-scroll-anchoring/infinite-scroll-event.tentative.html": [
+    [
+     "css/css-scroll-anchoring/infinite-scroll-event.tentative.html",
+     {}
+    ]
+   ],
    "css/css-scroll-anchoring/inheritance.html": [
     [
      "css/css-scroll-anchoring/inheritance.html",
@@ -573108,6 +573138,10 @@
    "7fcbd983ed569025e5f46fe69002ca91e86fd21a",
    "testharness"
   ],
+  "css/css-scroll-anchoring/infinite-scroll-event.tentative.html": [
+   "80fcc4cca0c89cbfd6436cc00193e7943988b23a",
+   "testharness"
+  ],
   "css/css-scroll-anchoring/inheritance.html": [
    "035d4ffd2e2c8955d4e8f80af3aff5db9285c8ae",
    "testharness"
@@ -584880,6 +584914,14 @@
    "0b8c52303d6f6cac87986f3d8d08d6258e8fe514",
    "support"
   ],
+  "css/css-transforms/individual-transform/translate-fill-box.html": [
+   "8892d63327964cf1e9c16a3febaecf5af4d1cceb",
+   "reftest"
+  ],
+  "css/css-transforms/individual-transform/translate-view-box.html": [
+   "56153594e79490abd5b3267c85ea1fef3489a029",
+   "reftest"
+  ],
   "css/css-transforms/inheritance.html": [
    "2bc0cf5c803947a076728919fdec0380e2c541b1",
    "testharness"
@@ -647873,7 +647915,7 @@
    "support"
   ],
   "interfaces/picture-in-picture.idl": [
-   "09b3b50c19bb4ab4a28e5d84dc3ed23d1c3c0298",
+   "3323fc1f099f86ebd06a85baabfe953211be3ae1",
    "support"
   ],
   "interfaces/pointerevents-extension.idl": [
@@ -647881,7 +647923,7 @@
    "support"
   ],
   "interfaces/pointerevents.idl": [
-   "fd368bf5a0a25cf983ca92417a945a409b8e4ee3",
+   "40364530d892757e8e1d23de7c3b00234f7a5bcf",
    "support"
   ],
   "interfaces/pointerlock.idl": [
@@ -648049,7 +648091,7 @@
    "support"
   ],
   "interfaces/webrtc-stats.idl": [
-   "87b079c00abe9e0ab265ca32e048e1c461b6efdc",
+   "26ebc9ca7758b92e5099d5cdedd6fe565159c903",
    "support"
   ],
   "interfaces/webrtc.idl": [
diff --git a/tests/wpt/metadata/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini b/tests/wpt/metadata/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
new file mode 100644
index 00000000000..5496474410b
--- /dev/null
+++ b/tests/wpt/metadata/css/compositing/mix-blend-mode/mix-blend-mode-animation.html.ini
@@ -0,0 +1,2 @@
+[mix-blend-mode-animation.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/translate-fill-box.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/translate-fill-box.html.ini
new file mode 100644
index 00000000000..83e3829fa1d
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/translate-fill-box.html.ini
@@ -0,0 +1,2 @@
+[translate-fill-box.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/individual-transform/translate-view-box.html.ini b/tests/wpt/metadata/css/css-transforms/individual-transform/translate-view-box.html.ini
new file mode 100644
index 00000000000..0730178807b
--- /dev/null
+++ b/tests/wpt/metadata/css/css-transforms/individual-transform/translate-view-box.html.ini
@@ -0,0 +1,2 @@
+[translate-view-box.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/fetch/content-type/response.window.js.ini b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
index 6527ed8fb48..802887f65df 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -324,12 +324,21 @@
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html */*]
     expected: FAIL
 
   [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
     expected: FAIL
 
+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index a5b9b3752be..d2df9b78483 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,6 +53,6 @@
   [combined text/javascript ]
     expected: FAIL
 
-  [separate text/javascript;charset=windows-1252  text/javascript]
+  [separate text/javascript x/x]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
deleted file mode 100644
index 87b07c3e670..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_1.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_1.html]
-  [Multiple history traversals from the same task]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
new file mode 100644
index 00000000000..51f8272a6de
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
@@ -0,0 +1,4 @@
+[traverse_the_history_3.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
index bf50d59df41..e02f179ec25 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
@@ -1,5 +1,24 @@
 [open-features-negative-innerwidth-innerheight.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `innerwidth`, `innerheight`]
     expected: FAIL
 
+  [features "innerheight=-404.5" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404.5" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=-404e1" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=-404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404e1" should NOT set "width=404"]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
index e150c9d848f..23eefb8eaf9 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-screenx-screeny.html.ini
@@ -1,5 +1,24 @@
 [open-features-negative-screenx-screeny.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `screenx`, `screeny`]
     expected: FAIL
 
+  [features "screenx=-204" should NOT set "left=204"]
+    expected: TIMEOUT
+
+  [features "screeny=-204" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "screeny=-204.5" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "screeny=-0" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "screenx=-0" should NOT set "left=204"]
+    expected: TIMEOUT
+
+  [features "screenx=-204.5" should NOT set "left=204"]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
index d1ed9088b2b..9027336b453 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
@@ -1,5 +1,24 @@
 [open-features-negative-width-height.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `width`, `height`]
     expected: FAIL
 
+  [features "height=-404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "height=-404e1" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "height=-404.5" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "width=-404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "width=-404e1" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "width=-404.5" should NOT set "width=404"]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
index a70e9dbad4d..4e44584b123 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-height.html.ini
@@ -1,32 +1,48 @@
 [open-features-non-integer-height.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `height`]
     expected: FAIL
 
   [features "height=405*3" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405.32" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405e1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405/5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405^4" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405.5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405e-1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405  " should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "height=405LLl" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "height=/404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [top=0,left=0,width=401,: absence of feature "height" should be treated same as "height=0"]
+    expected: TIMEOUT
+
+  [top=0,left=0: absence of feature "height" should be treated same as "height=0"]
+    expected: TIMEOUT
+
+  [features "height=_404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "height=L404" should NOT set "height=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
index 779531b4a98..fcaeae5336d 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerheight.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-innerheight.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerheight`]
     expected: FAIL
 
   [features "innerheight=405e-1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405LLl" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405^4" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405e1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405  " should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405/5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405.32" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405.5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerheight=405*3" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "innerheight=_404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=L404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=/404" should NOT set "height=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
index 7a1b258d52e..42327fedd27 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-innerwidth.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-innerwidth.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `innerwidth`]
     expected: FAIL
 
   [features "innerwidth=405e-1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405*3" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405.5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405e1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405.32" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405  " should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405LLl" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405/5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "innerwidth=405^4" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "innerwidth=/404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=_404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=L404" should NOT set "width=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
index caba4124f0b..a8e4fe06618 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-left.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-left.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `left`]
     expected: FAIL
 
   [features "left=105e1" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105  " should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105/5" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105e-1" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105^4" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105LLl" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105.32" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105*3" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "left=105.5" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "left=L104" should NOT set "left=104"]
+    expected: TIMEOUT
+
+  [features "left=/104" should NOT set "left=104"]
+    expected: TIMEOUT
+
+  [features "left=_104" should NOT set "left=104"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
index 9ace8a4cbdb..64a08faf0e6 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screenx.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-screenx.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screenx`]
     expected: FAIL
 
   [features "screenx=105.5" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105e1" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105  " should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105*3" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105e-1" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105^4" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105LLl" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105/5" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screenx=105.32" should set "left=105"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "screenx=_104" should NOT set "left=104"]
+    expected: TIMEOUT
+
+  [features "screenx=L104" should NOT set "left=104"]
+    expected: TIMEOUT
+
+  [features "screenx=/104" should NOT set "left=104"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
index a82bd0f981a..4f22ef4ef29 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-screeny.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-screeny.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for legacy feature `screeny`]
     expected: FAIL
 
   [features "screeny=405^4" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405e-1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405LLl" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405e1" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405  " should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405/5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405*3" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405.32" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "screeny=405.5" should set "height=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "screeny=_404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "screeny=L404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "screeny=/404" should NOT set "height=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
index 10f617db69e..8540f53d8d6 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-top.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `top`]
     expected: FAIL
 
   [features "top=105/5" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105*3" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105LLl" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105e-1" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105.32" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105e1" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105  " should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105^4" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105.5" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "top=/104" should NOT set "top=104"]
+    expected: TIMEOUT
+
+  [features "top=_104" should NOT set "top=104"]
+    expected: TIMEOUT
+
+  [features "top=L104" should NOT set "top=104"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
index 28f93ee71b5..9d841e61bc0 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
@@ -1,32 +1,48 @@
 [open-features-non-integer-width.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `width`]
     expected: FAIL
 
   [features "width=405^4" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405.5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405e1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405  " should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405.32" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405LLl" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405*3" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405e-1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405/5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [top=0,left=0: absence of feature "width" should be treated same as "width=0"]
+    expected: TIMEOUT
+
+  [features "width=_404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [top=0,left=0,height=401,: absence of feature "width" should be treated same as "width=0"]
+    expected: TIMEOUT
+
+  [features "width=/404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "width=L404" should NOT set "width=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
index fd369192a02..c757b400205 100644
--- a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
@@ -1,5 +1,5 @@
 [embedded-opener-remove-frame.html]
-  expected: TIMEOUT
+  expected: CRASH
   [opener and "removed" embedded documents]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submission-algorithm.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submission-algorithm.html.ini
index 127392316de..702af61a3c4 100644
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submission-algorithm.html.ini
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submission-algorithm.html.ini
@@ -1,7 +1,11 @@
 [form-submission-algorithm.html]
+  expected: TIMEOUT
   [If form's firing submission events is true, then return; 'submit' event]
     expected: FAIL
 
   [If form's firing submission events is true, then return; 'invalid' event]
     expected: FAIL
 
+  [Cannot navigate (after constructing the entry list)]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
deleted file mode 100644
index 9e522297c94..00000000000
--- a/tests/wpt/metadata/html/semantics/interactive-elements/the-details-element/toggleEvent.html.ini
+++ /dev/null
@@ -1,7 +0,0 @@
-[toggleEvent.html]
-  [Calling open twice on 'details' fires only one toggle event]
-    expected: FAIL
-
-  [Setting open=true to opened 'details' element should not fire a toggle event at the 'details' element]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
new file mode 100644
index 00000000000..a9677391662
--- /dev/null
+++ b/tests/wpt/metadata/html/syntax/parsing/DOMContentLoaded-defer.html.ini
@@ -0,0 +1,4 @@
+[DOMContentLoaded-defer.html]
+  [The end: DOMContentLoaded and defer scripts]
+    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 496bad988c6..034d9baebfa 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
@@ -1,4 +1,5 @@
 [promise-rejection-events.html]
+  expected: TIMEOUT
   [delayed handling: delaying handling rejected promise created from createImageBitmap will cause both events to fire]
     expected: FAIL
 
@@ -8,3 +9,6 @@
   [no unhandledrejection/rejectionhandled: rejection handler attached synchronously to a promise created from createImageBitmap]
     expected: FAIL
 
+  [rejectionhandled is dispatched from a queued task, and not immediately]
+    expected: TIMEOUT
+
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 66bd350083b..a56bad443a2 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
@@ -1,4 +1,5 @@
 [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/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
index 628a484d456..64e0907af2f 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffersourcenode-interface/sub-sample-buffer-stitching.html.ini
@@ -17,3 +17,9 @@
   [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[30\]\t1.9724091887474060e-1\t9.5236867666244507e-1\t7.5512775778770447e-1\t7.9289436569253091e-1\t3.8985999999999999e-3\n\t[60\]\t-2.2450675070285797e-1\t-5.8084785938262939e-1\t3.5634110867977142e-1\t6.1348441407448528e-1\t3.8985999999999999e-3\n\t[90\]\t-3.7808802723884583e-1\t-5.9811043739318848e-1\t2.2002241015434265e-1\t3.6786251568070089e-1\t3.8985999999999999e-3\n\t[120\]\t7.6881676912307739e-1\t9.4563448429107666e-1\t1.7681771516799927e-1\t1.8698315057805445e-1\t3.8985999999999999e-3\n\t[151\]\t5.4644601186737418e-4\t-4.1306272149085999e-2\t4.1852718160953373e-2\t1.0132291292202573e+0\t3.8985999999999999e-3\n\t...and 1419 more errors.\n\tMax AbsError of 9.8619294445961714e-1 at index of 1178.\n\t[1178\]\t-1.3593670912086964e-2\t-9.9978661537170410e-1\t9.8619294445961714e-1\t9.8640342778840562e-1\t3.8985999999999999e-3\n\tMax RelError of 1.0132291292202573e+0 at index of 151.\n]
     expected: FAIL
 
+  [X Stitched sine-wave buffers at sample rate 43800 does not equal [0,0.06264832615852356,0.12505052983760834,0.18696144223213196,0.24813786149024963,0.308339387178421,0.36732959747314453,0.4248766601085663,0.480754554271698,0.5347436666488647,0.5866320133209229,0.6362156271934509,0.6832997798919678,0.7276994585990906,0.7692402601242065,0.8077589869499207...\] with an element-wise tolerance of {"absoluteThreshold":0.0038986,"relativeThreshold":0}.\n\tIndex\tActual\t\t\tExpected\t\tAbsError\t\tRelError\t\tTest threshold\n\t[30\]\t1.9724091887474060e-1\t9.5236867666244507e-1\t7.5512775778770447e-1\t7.9289436569253091e-1\t3.8985999999999999e-3\n\t[60\]\t-2.2450675070285797e-1\t-5.8084785938262939e-1\t3.5634110867977142e-1\t6.1348441407448528e-1\t3.8985999999999999e-3\n\t[90\]\t-3.7808802723884583e-1\t-5.9811043739318848e-1\t2.2002241015434265e-1\t3.6786251568070089e-1\t3.8985999999999999e-3\n\t[120\]\t7.6881676912307739e-1\t9.4563448429107666e-1\t1.7681771516799927e-1\t1.8698315057805445e-1\t3.8985999999999999e-3\n\t[151\]\t5.4644601186737418e-4\t-4.1306272149085999e-2\t4.1852718160953373e-2\t1.0132291292202573e+0\t3.8985999999999999e-3\n\t...and 1419 more errors.\n\tMax AbsError of 8.4138224175362120e+28 at index of 20238.\n\t[20238\]\t-8.4138224175362120e+28\t-4.7574958205223083e-1\t8.4138224175362120e+28\t1.7685401595607684e+29\t3.8985999999999999e-3\n\tMax RelError of 1.7685401595607684e+29 at index of 20238.\n\t[20238\]\t-8.4138224175362120e+28\t-4.7574958205223083e-1\t8.4138224175362120e+28\t1.7685401595607684e+29\t3.8985999999999999e-3\n]
+    expected: FAIL
+
+  [X SNR (-535.2258493163142 dB) is not greater than or equal to 65.737. Got -535.2258493163142.]
+    expected: FAIL
+
diff --git a/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini b/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini
deleted file mode 100644
index dbea4f293ad..00000000000
--- a/tests/wpt/mozilla/meta/css/transition_calc_implicit.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[transition_calc_implicit.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html
new file mode 100644
index 00000000000..80fcc4cca0c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-scroll-anchoring/infinite-scroll-event.tentative.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1561450">
+<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/#suppression-triggers">
+<style>
+  body { margin: 0 }
+  .content {
+    height: 45vh;
+    background: lightblue;
+  }
+</style>
+<div class="content"></div>
+<div id="hidden" style="display: none; height: 200px"></div>
+<div class="content"></div>
+<div class="content"></div>
+<div class="content"></div>
+<script>
+let first = true;
+const t = async_test("Scroll adjustments don't happen if triggered from scroll event listeners");
+onscroll = t.step_func(function() {
+  assert_true(first, "Should only get one event");
+  first = false;
+  hidden.style.display = "block";
+  hidden.offsetTop;
+  hidden.style.display = "none";
+  requestAnimationFrame(t.step_func(function() {
+    requestAnimationFrame(t.step_func(function() {
+      t.done();
+    }));
+  }));
+});
+window.onload = t.step_func(function() {
+  window.scrollTo(0, document.scrollingElement.scrollTopMax - 200);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-fill-box.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-fill-box.html
new file mode 100644
index 00000000000..8892d633279
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-fill-box.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<title>transform-box: fill-box</title>
+<link rel="match" href="../transform-box/reference/greensquare200x200.html">
+<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#propdef-translate">
+<link rel="help" href="https://drafts.csswg.org/css-transforms/#transform-box">
+<meta name="assert" content="translate percentages are relative to the reference box.">
+<style>
+svg {
+  background-color: red;
+}
+rect {
+  transform-box: fill-box;
+}
+#target1 {
+  rotate: 90deg;
+}
+#target2 {
+  translate: 50% -50%;
+}
+#target3 {
+  transform-origin: 25% 25%;
+  translate: 25% 25%;
+  rotate: 180deg;
+}
+#target4 {
+  transform-origin: 75px 75px;
+  translate: 25% 25%;
+  rotate: -180deg;
+}
+</style>
+<p>There should be a green 200x200 rectangle below, and no red.</p>
+<svg width="200" height="200">
+  <rect id="target1" x="100" y="100" width="100" height="100" fill="green"/>
+  <rect id="target2" x="50" y="50" width="100" height="100" fill="green"/>
+  <rect id="target3" x="25" y="25" width="100" height="100" fill="green"/>
+  <rect id="target4" x="25" y="25" width="100" height="100" fill="green"/>
+</svg>
diff --git a/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-view-box.html b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-view-box.html
new file mode 100644
index 00000000000..56153594e79
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-transforms/individual-transform/translate-view-box.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<title>transform-box: view-box</title>
+<link rel="match" href="../transform-box/reference/greensquare200x200.html">
+<link rel="help" href="https://drafts.csswg.org/css-transforms-2/#propdef-translate">
+<link rel="help" href="https://drafts.csswg.org/css-transforms/#transform-box">
+<meta name="assert" content="translate percentages are relative to the reference box.">
+<style>
+svg {
+  background-color: red;
+}
+rect {
+  transform-box: view-box;
+}
+#target1 {
+  transform-origin: 25% 25%;
+  scale: 2;
+}
+#target2 {
+  translate: 50%;
+}
+#target3 {
+  translate: 0 50%;
+}
+#target4 {
+  transform-origin: 50% 50%;
+  rotate: 180deg;
+}
+</style>
+<p>There should be a green 200x200 rectangle below, and no red.</p>
+<svg width="200" height="200">
+  <rect id="target1" x="25" y="25" width="50" height="50" fill="green"/>
+  <rect id="target2" width="100" height="100" fill="green"/>
+  <rect id="target3" width="100" height="100" fill="green"/>
+  <rect id="target4" width="100" height="100" fill="green"/>
+</svg>
diff --git a/tests/wpt/web-platform-tests/interfaces/picture-in-picture.idl b/tests/wpt/web-platform-tests/interfaces/picture-in-picture.idl
index 09b3b50c19b..3323fc1f099 100644
--- a/tests/wpt/web-platform-tests/interfaces/picture-in-picture.idl
+++ b/tests/wpt/web-platform-tests/interfaces/picture-in-picture.idl
@@ -23,6 +23,7 @@ partial interface mixin DocumentOrShadowRoot {
   readonly attribute Element? pictureInPictureElement;
 };
 
+[Exposed=Window]
 interface PictureInPictureWindow : EventTarget {
   readonly attribute long width;
   readonly attribute long height;
diff --git a/tests/wpt/web-platform-tests/interfaces/pointerevents.idl b/tests/wpt/web-platform-tests/interfaces/pointerevents.idl
index fd368bf5a0a..40364530d89 100644
--- a/tests/wpt/web-platform-tests/interfaces/pointerevents.idl
+++ b/tests/wpt/web-platform-tests/interfaces/pointerevents.idl
@@ -4,30 +4,30 @@
 // Source: Pointer Events (https://w3c.github.io/pointerevents/)
 
 dictionary PointerEventInit : MouseEventInit {
-    long pointerId = 0;
-    double width = 1;
-    double height = 1;
-    float pressure = 0;
-    float tangentialPressure = 0;
-    long tiltX = 0;
-    long tiltY = 0;
-    long twist = 0;
-    DOMString pointerType = "";
-    boolean isPrimary = false;
+    long        pointerId = 0;
+    double      width = 1;
+    double      height = 1;
+    float       pressure = 0;
+    float       tangentialPressure = 0;
+    long        tiltX = 0;
+    long        tiltY = 0;
+    long        twist = 0;
+    DOMString   pointerType = "";
+    boolean     isPrimary = false;
 };
 
-[Constructor(DOMString type, optional PointerEventInit eventInitDict), Exposed=Window]
+[Constructor(DOMString type, optional PointerEventInit eventInitDict = {}), Exposed=Window]
 interface PointerEvent : MouseEvent {
-    readonly        attribute long pointerId;
-    readonly        attribute double width;
-    readonly        attribute double height;
-    readonly        attribute float pressure;
-    readonly        attribute float tangentialPressure;
-    readonly        attribute long tiltX;
-    readonly        attribute long tiltY;
-    readonly        attribute long twist;
-    readonly        attribute DOMString pointerType;
-    readonly        attribute boolean isPrimary;
+    readonly        attribute long        pointerId;
+    readonly        attribute double      width;
+    readonly        attribute double      height;
+    readonly        attribute float       pressure;
+    readonly        attribute float       tangentialPressure;
+    readonly        attribute long        tiltX;
+    readonly        attribute long        tiltY;
+    readonly        attribute long        twist;
+    readonly        attribute DOMString   pointerType;
+    readonly        attribute boolean     isPrimary;
 };
 
 partial interface Element {
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
index 87b079c00ab..26ebc9ca775 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
@@ -265,6 +265,7 @@ dictionary RTCTransportStats : RTCStats {
              DOMString dtlsCipher;
              DOMString srtpCipher;
              DOMString tlsGroup;
+             unsigned long selectedCandidatePairChanges;
 };
 
 dictionary RTCIceCandidateStats : RTCStats {