diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index dcda26e69be..54d0ebbc3ff 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -374704,6 +374704,18 @@
      {}
     ]
    ],
+   "loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html": [
+    [
+     "loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html",
+     {}
+    ]
+   ],
+   "loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html": [
+    [
+     "loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html",
+     {}
+    ]
+   ],
    "loading/lazyload/image-loading-lazy-load-event.tentative.html": [
     [
      "loading/lazyload/image-loading-lazy-load-event.tentative.html",
@@ -671349,6 +671361,14 @@
    "76eef3a8f45c131bdbf90028f8bcad75be0e5f32",
    "testharness"
   ],
+  "loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html": [
+   "a545410f9787a7e8650fcde54556f407bafffa83",
+   "testharness"
+  ],
+  "loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html": [
+   "d316a6ae22bea4b4bf7a1b02ba21c24556923790",
+   "testharness"
+  ],
   "loading/lazyload/image-loading-lazy-load-event.tentative.html": [
    "9e56a3150953494533d117841dcdd454aaa039f2",
    "testharness"
@@ -722414,7 +722434,7 @@
    "manual"
   ],
   "web-nfc/NDEFWriter_push.https.html": [
-   "a6050b8ff7112cc00ec29b596c992cafb3657b7e",
+   "1bdbf0bb50b38b2e385a5938a79c7bf679805b2b",
    "testharness"
   ],
   "web-nfc/README.md": [
diff --git a/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini b/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
index e35a452a186..70a00a101f6 100644
--- a/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
@@ -1,2 +1,2 @@
 [no-transition-from-ua-to-blocking-stylesheet.html]
-  expected: TIMEOUT
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
index 628b1fab770..c884dc82eab 100644
--- a/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/MediaQueryList-addListener-removeListener.html.ini
@@ -2,3 +2,6 @@
   [listeners are called when <iframe> is resized]
     expected: FAIL
 
+  [listeners are called correct number of times]
+    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 f37c04a5b81..a46dd474941 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -309,21 +309,15 @@
   [<iframe>: separate response Content-Type: */* text/html]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
-    expected: FAIL
-
-  [<iframe>: combined response Content-Type: text/html */*]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: */* text/html]
+  [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
+  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
index d4ba399b762..ce73518c20a 100644
--- a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -14,3 +14,6 @@
   [X-Content-Type-Options%3A%20'NosniFF']
     expected: FAIL
 
+  [X-Content-Type-Options%3A%20%2Cnosniff]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
index 07aac5f75f8..6bd06899fdd 100644
--- a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
+++ b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
@@ -1,11 +1,11 @@
 [embedded-credentials.tentative.sub.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Embedded credentials are treated as network errors.]
     expected: FAIL
 
   [Embedded credentials are treated as network errors in frames.]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Embedded credentials are treated as network errors in new windows.]
     expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
deleted file mode 100644
index 75d75b4cda2..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_2.html]
-  [Multiple history traversals, last would be aborted]
-    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
deleted file mode 100644
index 51f8272a6de..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_3.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_3.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
index 6852d7663de..c12c0f8ae48 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
@@ -1,8 +1,4 @@
 [skip-document-with-fragment.html]
-  expected: TIMEOUT
   [Autofocus elements in iframed documents with URL fragments should be skipped.]
     expected: FAIL
 
-  [Autofocus elements in top-level browsing context's documents with URI fragments should be skipped.]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index e440b1e38c6..71edac2c5ed 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-3.html]
   type: testharness
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini b/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
index 97f8a0cc51f..6d08beab111 100644
--- a/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
+++ b/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
@@ -10,6 +10,3 @@
   [Verifies the resolution of entry.startTime is at least 20 microseconds.]
     expected: TIMEOUT
 
-  [Verifies the resolution of performance.now() is at least 5 microseconds.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini b/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
index b4090ef9fe2..1c7ec9ce1db 100644
--- a/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
+++ b/tests/wpt/metadata/resource-timing/crossorigin-sandwich-TAO.sub.html.ini
@@ -1,5 +1,4 @@
 [crossorigin-sandwich-TAO.sub.html]
-  expected: ERROR
   [There should be one entry.]
     expected: FAIL
 
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 a56bad443a2..66bd350083b 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/workers/semantics/multiple-workers/005.html.ini b/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
index 268949ced5c..f584fce5df1 100644
--- a/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
+++ b/tests/wpt/metadata/workers/semantics/multiple-workers/005.html.ini
@@ -1,4 +1,5 @@
 [005.html]
+  expected: ERROR
   [dedicated worker in shared worker in dedicated worker]
     expected: FAIL
 
diff --git a/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html b/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html
new file mode 100644
index 00000000000..a545410f978
--- /dev/null
+++ b/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-below-viewport-dynamic.tentative.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<head>
+  <title>Below viewport images with loading='lazy' and changed to
+         loading='eager' load and do not block the window load event</title>
+  <link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
+  <link rel="help" href="https://github.com/scott-little/lazyload">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+
+<!--
+Marked as tentative until https://github.com/whatwg/html/pull/3752 is landed.
+-->
+
+<script>
+  const t = async_test("Test that below viewport images with loading='lazy' " +
+                       "and changed to loading='eager' load and do not block " +
+                       "the window load event.");
+
+  let has_below_viewport_loaded = false;
+  let has_window_loaded = false;
+
+  window.addEventListener("load", t.step_func(function() {
+    assert_false(has_window_loaded,
+                 "The window.load() event should only fire once.");
+    has_window_loaded = true;
+  }));
+
+  const below_viewport_img_onload = t.step_func_done(function() {
+    assert_false(has_below_viewport_loaded,
+               "The in_viewport element should load only once.");
+    assert_true(has_window_loaded,
+                "The window.load() event should have fired before " +
+                "below_viewport loaded.");
+    has_below_viewport_loaded = true;
+  });
+</script>
+
+<body>
+  <div style="height:10000px;"></div>
+  <img id="below_viewport" src="resources/image.png?pipe=trickle(d2)"
+       loading="lazy" onload="below_viewport_img_onload();">
+  <script>
+    assert_false(has_window_loaded,
+                "The window.load() event should not fire before " +
+                "changing below_viewport to loading='eager'.");
+    document.getElementById("below_viewport").loading = 'eager';
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html b/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html
new file mode 100644
index 00000000000..d316a6ae22b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/loading/lazyload/image-loading-lazy-in-viewport-dynamic.tentative.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<head>
+  <title>In viewport images with loading='lazy' and changed to loading='eager'
+         do not block the window load event</title>
+  <link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
+  <link rel="help" href="https://github.com/scott-little/lazyload">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+
+<!--
+Marked as tentative until https://github.com/whatwg/html/pull/3752 is landed.
+-->
+
+<script>
+  const t = async_test("Test that in viewport images with loading='lazy' and " +
+                       "changed to loading='eager' do not block the window " +
+                       "load event.");
+
+  let has_in_viewport_loaded = false;
+  let has_window_loaded = false;
+
+  const in_viewport_img_onload = t.step_func_done(function() {
+    assert_false(has_in_viewport_loaded,
+               "The in_viewport element should load only once.");
+    assert_true(has_window_loaded,
+               "The window.load() event should fire before in_viewport image loads.");
+    has_in_viewport_loaded = true;
+  });
+
+  window.addEventListener("load", t.step_func(function() {
+    assert_false(has_window_loaded,
+                 "The window.load() event should only fire once.");
+    has_window_loaded = true;
+  }));
+</script>
+
+<body>
+  <img id="in_viewport" src="resources/image.png?pipe=trickle(d2)"
+       loading="lazy" onload="in_viewport_img_onload();">
+  <script>
+    document.getElementById("in_viewport").loading = 'eager';
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html b/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
index a6050b8ff71..1bdbf0bb50b 100644
--- a/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
+++ b/tests/wpt/web-platform-tests/web-nfc/NDEFWriter_push.https.html
@@ -35,9 +35,6 @@ const invalid_type_messages =
       // "utf-16", "utf-16le" or "utf-16be".
       createMessage([createTextRecord(test_text_data, "chinese")]),
 
-      // NDEFRecord.lang length for 'text' record must be lower than 64.
-      createMessage([createTextRecord(test_text_data, undefined /* encoding */, [...Array(64)].map(_ => 'a'))]),
-
       // https://w3c.github.io/web-nfc/#dfn-map-a-url-to-ndef
       // NDEFRecord must have data.
       createMessage([createUrlRecord()]),
@@ -91,6 +88,10 @@ const invalid_syntax_messages =
       // Data for 'url' or 'absolute-url' record, must be a valid URL.
       createMessage([createUrlRecord('Invalid URL:// Data')]),
       createMessage([createUrlRecord('Invalid URL:// Data', true)]),
+
+      // NDEFRecord.lang length for 'text' record must be lower than 64.
+      createMessage([createTextRecord(test_text_data, undefined /* encoding */,
+                                      [...Array(64)].map(_ => 'a'))]),
     ];
 
 const invalid_signals = [