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 3a3d15b8406..3b874fc1748 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 71b5b1db7ad..e340f21957d 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -129501,6 +129501,30 @@
      {}
     ]
    ],
+   "css/css-multicol/multicol-span-all-009.html": [
+    [
+     "/css/css-multicol/multicol-span-all-009.html",
+     [
+      [
+       "/css/css-multicol/multicol-span-all-009-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-multicol/multicol-span-all-010.html": [
+    [
+     "/css/css-multicol/multicol-span-all-010.html",
+     [
+      [
+       "/css/css-multicol/multicol-span-all-010-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-multicol/multicol-span-all-block-sibling-003.xht": [
     [
      "/css/css-multicol/multicol-span-all-block-sibling-003.xht",
@@ -136657,6 +136681,30 @@
      {}
     ]
    ],
+   "css/css-sizing/block-image-percentage-max-height-inside-inline.html": [
+    [
+     "/css/css-sizing/block-image-percentage-max-height-inside-inline.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square.xht",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-sizing/image-percentage-max-height-in-anonymous-block.html": [
+    [
+     "/css/css-sizing/image-percentage-max-height-in-anonymous-block.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square.xht",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-sizing/intrinsic-percent-non-replaced-001.html": [
     [
      "/css/css-sizing/intrinsic-percent-non-replaced-001.html",
@@ -266911,6 +266959,16 @@
      {}
     ]
    ],
+   "css/css-multicol/multicol-span-all-009-ref.html": [
+    [
+     {}
+    ]
+   ],
+   "css/css-multicol/multicol-span-all-010-ref.html": [
+    [
+     {}
+    ]
+   ],
    "css/css-multicol/multicol-span-all-block-sibling-3-ref.xht": [
     [
      {}
@@ -382526,6 +382584,12 @@
      {}
     ]
    ],
+   "html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html": [
+    [
+     "/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html",
+     {}
+    ]
+   ],
    "html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document.open-01.xhtml": [
     [
      "/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document.open-01.xhtml",
@@ -418728,6 +418792,12 @@
      {}
     ]
    ],
+   "webaudio/the-audio-api/the-pannernode-interface/automation-changes.html": [
+    [
+     "/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html",
+     {}
+    ]
+   ],
    "webaudio/the-audio-api/the-pannernode-interface/ctor-panner.html": [
     [
      "/webaudio/the-audio-api/the-pannernode-interface/ctor-panner.html",
@@ -477772,7 +477842,7 @@
    "support"
   ],
   "content-security-policy/navigation/to-javascript-parent-initiated-child-csp.html": [
-   "d2289257a888efe0f35e296922948bdbf5f70394",
+   "f4daf182f74fd550bee7d2d274e3842c84054e7c",
    "testharness"
   ],
   "content-security-policy/navigation/to-javascript-parent-initiated-parent-csp-disallow.html": [
@@ -477780,7 +477850,7 @@
    "testharness"
   ],
   "content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html": [
-   "4cbb37ee68fb83890d5f4881c4e1a78f013eaa52",
+   "8aa8884914d58185bc5622dc0f3047030f873e1c",
    "testharness"
   ],
   "content-security-policy/navigation/to-javascript-url-frame-src.html": [
@@ -566991,6 +567061,22 @@
    "2464327ff4238fb167bb8fc76b7f3d01fea1d377",
    "reftest"
   ],
+  "css/css-multicol/multicol-span-all-009-ref.html": [
+   "b323e423e0ce6076d166e59349a373715dc91de3",
+   "support"
+  ],
+  "css/css-multicol/multicol-span-all-009.html": [
+   "7b030fb672092ad24a8bca1b21eed0a9c24e7bda",
+   "reftest"
+  ],
+  "css/css-multicol/multicol-span-all-010-ref.html": [
+   "417bd528b3ee96a8f4bcdbfb4638941176c00ef6",
+   "support"
+  ],
+  "css/css-multicol/multicol-span-all-010.html": [
+   "49b8f918585b46afa8687e7e75979062f49c3e2a",
+   "reftest"
+  ],
   "css/css-multicol/multicol-span-all-block-sibling-003.xht": [
    "bd2cdd6cdab0fc15c2e16e2237f6b025230332c4",
    "reftest"
@@ -573487,6 +573573,14 @@
    "0dbbb2f9404da7cfa89f2e75af3ca06cfbe4be7e",
    "testharness"
   ],
+  "css/css-sizing/block-image-percentage-max-height-inside-inline.html": [
+   "2f6ad684c1fb0be5498dc6a5b938da67adfe3ec7",
+   "reftest"
+  ],
+  "css/css-sizing/image-percentage-max-height-in-anonymous-block.html": [
+   "5b1713975eb21e96a558933f81412a7bb0007d19",
+   "reftest"
+  ],
   "css/css-sizing/intrinsic-percent-non-replaced-001-ref.html": [
    "0b217dd192c0644ba30ec2ceb290689b99ff9193",
    "support"
@@ -611812,7 +611906,7 @@
    "support"
   ],
   "docs/_writing-tests/testharness-api.md": [
-   "5d23e253946d17e1f497d1e7487605292a079db3",
+   "657d3962c98978b4c697edc6815bde7fe2ba35c5",
    "support"
   ],
   "docs/_writing-tests/testharness.md": [
@@ -623128,7 +623222,7 @@
    "testharness"
   ],
   "html/dom/elements/global-attributes/dataset-delete.html": [
-   "65e131f445a409ddff840cad7d98c449d1bca042",
+   "1440118f6daa531d2bfde982c67676d22cffa197",
    "testharness"
   ],
   "html/dom/elements/global-attributes/dataset-enumeration.html": [
@@ -638191,6 +638285,10 @@
    "be646d15b803d3fbe583a38d4524ad36e1a9b5d1",
    "testharness"
   ],
+  "html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html": [
+   "5596382f2264cb84da5b528f18df74bbe79f4695",
+   "testharness"
+  ],
   "html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document.open-01.xhtml": [
    "974702ae8cbdbd45704d325d5d7e1e649535bd09",
    "testharness"
@@ -639636,7 +639734,7 @@
    "support"
   ],
   "interfaces/accelerometer.idl": [
-   "8be7d09881d28240bc7c48d897e05a5b8ca234ad",
+   "3705d4ba0ec93e23254374bd9b8e60dfb2cf0a08",
    "support"
   ],
   "interfaces/ambient-light.idl": [
@@ -639820,7 +639918,7 @@
    "support"
   ],
   "interfaces/geolocation-sensor.idl": [
-   "40a164767e2a92e2cce07c6416bc22a7809568cb",
+   "41c310acefe12f7dcf8ae2a3369fcc11230b2a09",
    "support"
   ],
   "interfaces/geometry.idl": [
@@ -639828,7 +639926,7 @@
    "support"
   ],
   "interfaces/gyroscope.idl": [
-   "d71fd367bf0630938f523c710f421148edbc092d",
+   "24cd82c643159d680004937d12a17a38c06ece1b",
    "support"
   ],
   "interfaces/hr-time.idl": [
@@ -639868,7 +639966,7 @@
    "support"
   ],
   "interfaces/magnetometer.idl": [
-   "bcc8d4becbafb2d2c717d63a118cf768576daa63",
+   "fd29af847679dcca3c4d2d3eedf56d1cf9af89ff",
    "support"
   ],
   "interfaces/media-capabilities.idl": [
@@ -639920,7 +640018,7 @@
    "support"
   ],
   "interfaces/orientation-sensor.idl": [
-   "49acba9e201d28753103964db7458d324be50bdf",
+   "a9aec968e0a072df3bf1eb1452045958f693bc96",
    "support"
   ],
   "interfaces/page-visibility.idl": [
@@ -666008,7 +666106,7 @@
    "testharness"
   ],
   "service-workers/service-worker/claim-fetch.https.html": [
-   "6b7d353c6ae3b53c5c7d9398f09fb2f476201db1",
+   "400b593ac961942f6e9274aee98bac22856eaf22",
    "testharness"
   ],
   "service-workers/service-worker/claim-not-using-registration.https.html": [
@@ -673560,7 +673658,7 @@
    "support"
   ],
   "tools/ci/tag_master.py": [
-   "72bafd3a866317889ecbb75a6981ce1c88a38b9e",
+   "0ae2801dfe70b2e3409800f210410a107ea53d81",
    "support"
   ],
   "tools/ci/taskcluster-run.py": [
@@ -673844,7 +673942,7 @@
    "support"
   ],
   "tools/manifest/vcs.py": [
-   "69eb9ab8ecb8f08cadfaf3fb76ee2ae39903fa9b",
+   "69c7a79076bfa57035e74f9e9cbc61add523891a",
    "support"
   ],
   "tools/py27-flake8.ini": [
@@ -674244,7 +674342,7 @@
    "support"
   ],
   "tools/requirements_flake8.txt": [
-   "00d182e2d0f5fc013056951229e3aa3f38143369",
+   "970f00416dc8bea1e7722dac6fa1074d50bb00b6",
    "support"
   ],
   "tools/runner/css/bootstrap-theme.min.css": [
@@ -679208,7 +679306,7 @@
    "support"
   ],
   "tools/wptserve/tests/test_config.py": [
-   "45f138f131d3bcb754fcd4605d5e3a101cf8d6e8",
+   "85271c3a4b324705688f505b53499bab83e133b4",
    "support"
   ],
   "tools/wptserve/tests/test_replacement_tokenizer.py": [
@@ -683415,6 +683513,10 @@
    "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
    "support"
   ],
+  "webaudio/the-audio-api/the-pannernode-interface/automation-changes.html": [
+   "8aa73552aab5e1639ac95e4ae7e06c725c9cad0c",
+   "testharness"
+  ],
   "webaudio/the-audio-api/the-pannernode-interface/ctor-panner.html": [
    "d330c9c3de4482ee70c036e0ab7ff8feb1fd5a36",
    "testharness"
@@ -685104,7 +685206,7 @@
    "support"
   ],
   "webrtc-quic/RTCQuicStream.https.html": [
-   "b62377f0ced871f8f8d6b51b5715d68abbe0334e",
+   "563d74a20808c23491d3b1228b827e6809dba1bf",
    "testharness"
   ],
   "webrtc-quic/RTCQuicTransport-helper.js": [
@@ -685216,7 +685318,7 @@
    "support"
   ],
   "webrtc/RTCIceTransport-extension.https.html": [
-   "e9e70379a483e1456259b521fc8094689aa15373",
+   "0d54c8b0239ce90f15680f8075c8aae651eb20d1",
    "testharness"
   ],
   "webrtc/RTCIceTransport.html": [
diff --git a/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth.html.ini b/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth.html.ini
index bcd187f508c..8e2ceeddfbe 100644
--- a/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth.html.ini
@@ -6,3 +6,6 @@
   [Instant scrolling while doing history navigation.]
     expected: FAIL
 
+  [Smooth scrolling while doing history navigation.]
+    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 18f786d4963..915e2958e9d 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,3 +312,6 @@
   [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
     expected: FAIL
 
+  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/dom/elements/global-attributes/dataset-delete.html.ini b/tests/wpt/metadata/html/dom/elements/global-attributes/dataset-delete.html.ini
new file mode 100644
index 00000000000..d7974a83447
--- /dev/null
+++ b/tests/wpt/metadata/html/dom/elements/global-attributes/dataset-delete.html.ini
@@ -0,0 +1,4 @@
+[dataset-delete.html]
+  [Deleting element.dataset['-foo'\] should not remove an attribute with name 'data--foo' should it exist.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html.ini
new file mode 100644
index 00000000000..a82566c6e66
--- /dev/null
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html.ini
@@ -0,0 +1,4 @@
+[document-open-cancels-javascript-url-navigation.html]
+  [document-open-cancels-javascript-url-navigation]
+    expected: FAIL
+
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 7725b118e9d..99a24216c88 100644
--- a/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
+++ b/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
@@ -12,6 +12,3 @@
   [Verifies the resolution of entry.startTime is at least 5 microseconds.]
     expected: TIMEOUT
 
-  [Verifies the resolution of performance.now() is at least 5 microseconds.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html.ini
new file mode 100644
index 00000000000..a20719e01f3
--- /dev/null
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html.ini
@@ -0,0 +1,2 @@
+[automation-changes.html]
+  expected: ERROR
diff --git a/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-child-csp.html b/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-child-csp.html
index d2289257a88..f4daf182f74 100644
--- a/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-child-csp.html
+++ b/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-child-csp.html
@@ -8,11 +8,13 @@
 <div onclick="frames[0].location.href = 'javascript:parent.postMessage(\'executed\', \'*\')'" id="special_div"></div>
 <script>
   var t = async_test("Should have executed the javascript url");
-  window.onmessage = t.step_func(function(e) {
-    if (e.data == "executed")
-      t.done();
+  frames[0].addEventListener('load', () => {
+    window.onmessage = t.step_func(function(e) {
+      if (e.data == "executed")
+        t.done();
+    });
+    window.addEventListener('securitypolicyviolation', t.unreached_func("Should not have raised a violation event"));
+    document.getElementById('special_div').click();
   });
-  window.addEventListener('securitypolicyviolation', t.unreached_func("Should not have raised a violation event"));
-  document.getElementById('special_div').click();
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html b/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html
index 4cbb37ee68f..8aa8884914d 100644
--- a/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html
+++ b/tests/wpt/web-platform-tests/content-security-policy/navigation/to-javascript-parent-initiated-parent-csp.html
@@ -9,14 +9,16 @@
 <div onclick="frames[0].location.href = 'javascript:parent.postMessage(\'executed\', \'*\')'" id="special_div"></div>
 <script nonce='abc'>
   var t = async_test("Should not have executed the javascript url");
-  window.onmessage = t.step_func(function(e) {
-    if (e.data == "executed")
-      assert_true(false, "Javascript url executed");
+  frames[0].addEventListener('load', () => {
+    window.onmessage = t.step_func(function(e) {
+      if (e.data == "executed")
+        assert_true(false, "Javascript url executed");
+    });
+    window.addEventListener('securitypolicyviolation', t.step_func_done(function(e) {
+      assert_equals(e.blockedURI, 'inline');
+      assert_equals(e.violatedDirective, 'script-src-attr');
+    }));
+    document.getElementById('special_div').click();
   });
-  window.addEventListener('securitypolicyviolation', t.step_func_done(function(e) {
-    assert_equals(e.blockedURI, 'inline');
-    assert_equals(e.violatedDirective, 'script-src-attr');
-  }));
-  document.getElementById('special_div').click();
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009-ref.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009-ref.html
new file mode 100644
index 00000000000..b323e423e0c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009-ref.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test Reference: Test the multicol element is the containing block of absolute elements</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+
+  <style>
+  body {
+    column-count: 1;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+    transform: scale(1);
+  }
+  h3 {
+    /* "column-count: 1" makes this behave like a real spanner. */
+    outline: 1px solid blue;
+  }
+  .out-of-flow {
+    position: absolute;
+    top: 0;
+    right: 0;
+  }
+  </style>
+
+  <body>
+    <article id="column">
+      <h3>spanner</h3>
+      <div class="out-of-flow">out-of-flow</div>
+    </article>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009.html
new file mode 100644
index 00000000000..7b030fb6720
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-009.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test: Test the multicol element is the containing block of absolute elements</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#the-multi-column-model">
+  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
+  <link rel="match" href="multicol-span-all-009-ref.html">
+  <meta name="assert" content="This test checks the multicol element, not the column boxes divided by column-span, is the containing block of absolute elements.">
+
+  <style>
+  article {
+    column-count: 3;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+    transform: scale(1);
+  }
+  h3 {
+    column-span: all;
+    outline: 1px solid blue;
+  }
+  .out-of-flow {
+    position: absolute;
+    top: 0;
+    right: 0;
+  }
+  </style>
+
+  <body>
+    <article id="column">
+      <h3>spanner</h3>
+      <div class="out-of-flow">out-of-flow</div>
+    </article>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010-ref.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010-ref.html
new file mode 100644
index 00000000000..417bd528b3e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010-ref.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test Reference: Test the position of the out-of-flow block is relative to the fragment divided by column-span:all</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+
+  <style>
+  body {
+    column-count: 1;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+  }
+  h3 {
+    /* "column-count: 1" makes this behave like a real spanner. */
+    outline: 1px solid blue;
+  }
+  .out-of-flow {
+    position: absolute;
+    top: 0;
+    left: 0;
+  }
+  </style>
+
+  <body>
+    <article id="column">
+      <h3>spanner</h3>
+      <div style="transform: scale(1)">
+        <div class="out-of-flow">out-of-flow</div>
+      </div>
+    </article>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010.html
new file mode 100644
index 00000000000..49b8f918585
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-010.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test: Test the position of the out-of-flow block is relative to the later fragment divided by the column-span:all</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#the-multi-column-model">
+  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
+  <link rel="match" href="multicol-span-all-010-ref.html">
+  <meta name="assert" content="This test checks the position of the out-of-flow block is relative to the latre fragment divided by the column-span:all.">
+
+  <style>
+  article {
+    column-count: 3;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+  }
+  h3 {
+    column-span: all;
+    outline: 1px solid blue;
+  }
+  .out-of-flow {
+    position: absolute;
+    top: 0;
+    left: 0;
+  }
+  </style>
+
+  <body>
+    <article id="column">
+      <!-- "transform" doesn't create a new block formatting context, so
+           column-span:all still works. -->
+      <div style="transform: scale(1)">
+        <h3>spanner</h3>
+        <div class="out-of-flow">out-of-flow</div>
+      </div>
+    </article>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/block-image-percentage-max-height-inside-inline.html b/tests/wpt/web-platform-tests/css/css-sizing/block-image-percentage-max-height-inside-inline.html
new file mode 100644
index 00000000000..2f6ad684c1f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/block-image-percentage-max-height-inside-inline.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://www.w3.org/TR/css-sizing-3/#max-size-properties">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="width:100px; height:100px; background:red;">
+  <span>
+    <!-- The image is a 1x1 transparent one. -->
+    <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" style="display:block; max-width:100px; height:1000px; max-height:100%; background:green;">
+  </span>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-sizing/image-percentage-max-height-in-anonymous-block.html b/tests/wpt/web-platform-tests/css/css-sizing/image-percentage-max-height-in-anonymous-block.html
new file mode 100644
index 00000000000..5b1713975eb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-sizing/image-percentage-max-height-in-anonymous-block.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://www.w3.org/TR/css-sizing-3/#max-size-properties">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="width:100px; height:100px; background:red;">
+  <div></div>
+  <!-- The image is a 1x1 transparent one. -->
+  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" style="max-width:100px; height:1000px; max-height:100%; background:green;">
+</div>
diff --git a/tests/wpt/web-platform-tests/docs/_writing-tests/testharness-api.md b/tests/wpt/web-platform-tests/docs/_writing-tests/testharness-api.md
index 5d23e253946..657d3962c98 100644
--- a/tests/wpt/web-platform-tests/docs/_writing-tests/testharness-api.md
+++ b/tests/wpt/web-platform-tests/docs/_writing-tests/testharness-api.md
@@ -776,11 +776,14 @@ assert that property `property_name` on object is readonly
 ### `assert_throws(code, func, description)`
 `code` - the expected exception. This can take several forms:
 
-  * string - the thrown exception must be a DOMException with the given
-             name, e.g., "TimeoutError" (for compatibility with existing
-             tests, a constant is also supported, e.g., "TIMEOUT_ERR")
-  * object - the thrown exception must have a property called "name" that
-             matches code.name
+  * string - asserts that the thrown exception must be a DOMException
+             with the given name, e.g., "TimeoutError". (For
+             compatibility with existing tests, the name of a
+             DOMException constant can also be given, e.g.,
+             "TIMEOUT_ERR")
+  * object - asserts that the thrown exception must be any other kind
+             of exception, with a property called "name" that matches
+             `code.name`.
 
 `func` - a function that should throw
 
diff --git a/tests/wpt/web-platform-tests/html/dom/elements/global-attributes/dataset-delete.html b/tests/wpt/web-platform-tests/html/dom/elements/global-attributes/dataset-delete.html
index 65e131f445a..1440118f6da 100644
--- a/tests/wpt/web-platform-tests/html/dom/elements/global-attributes/dataset-delete.html
+++ b/tests/wpt/web-platform-tests/html/dom/elements/global-attributes/dataset-delete.html
@@ -32,8 +32,15 @@
         "Deleting element.dataset['-'] should also remove an attribute with name 'data--' should it exist.");
       test(function() { assert_true(testDelete('data--foo', 'Foo')); },
         "Deleting element.dataset['Foo'] should also remove an attribute with name 'data--foo' should it exist.");
-      test(function() { assert_true(testDeleteNoAdd('data--foo', '-foo')); },
-        "Deleting element.dataset['-foo'] should also remove an attribute with name 'data--foo' should it exist.");
+      test(function() {
+        var d = document.createElement("div");
+        d.setAttribute('data--foo', "value");
+        assert_equals(d.dataset['-foo'], undefined);
+        assert_false('-foo' in d.dataset);
+        delete d.dataset['-foo'];
+        assert_true(d.hasAttribute('data--foo'));
+        assert_equals(d.getAttribute('data--foo'), "value");
+      }, "Deleting element.dataset['-foo'] should not remove an attribute with name 'data--foo' should it exist.");
       test(function() { assert_true(testDelete('data---foo', '-Foo')); },
         "Deleting element.dataset['-Foo'] should also remove an attribute with name 'data---foo' should it exist.");
       test(function() { assert_true(testDelete('data-', '')); },
diff --git a/tests/wpt/web-platform-tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html b/tests/wpt/web-platform-tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html
new file mode 100644
index 00000000000..5596382f226
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/document-open-cancels-javascript-url-navigation.html
@@ -0,0 +1,17 @@
+<body>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+async_test(t => {
+  window.onload = t.step_func_done(() => assert_equals(i.contentDocument.body.innerText, "PASS"));
+
+  var i = document.createElement('iframe');
+  i.id ='i';
+  i.src = "javascript:'FAIL'";
+  document.body.appendChild(i);
+  i.contentDocument.open();
+  i.contentDocument.write("PASS")
+  i.contentDocument.close();
+});
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/interfaces/accelerometer.idl b/tests/wpt/web-platform-tests/interfaces/accelerometer.idl
index 8be7d09881d..3705d4ba0ec 100644
--- a/tests/wpt/web-platform-tests/interfaces/accelerometer.idl
+++ b/tests/wpt/web-platform-tests/interfaces/accelerometer.idl
@@ -26,3 +26,15 @@ interface LinearAccelerationSensor : Accelerometer {
   Exposed=Window]
 interface GravitySensor : Accelerometer {
 };
+
+dictionary AccelerometerReadingValues {
+  required double? x;
+  required double? y;
+  required double? z;
+};
+
+dictionary LinearAccelerationReadingValues : AccelerometerReadingValues {
+};
+
+dictionary GravityReadingValues : AccelerometerReadingValues {
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/geolocation-sensor.idl b/tests/wpt/web-platform-tests/interfaces/geolocation-sensor.idl
index 40a164767e2..41c310acefe 100644
--- a/tests/wpt/web-platform-tests/interfaces/geolocation-sensor.idl
+++ b/tests/wpt/web-platform-tests/interfaces/geolocation-sensor.idl
@@ -33,3 +33,13 @@ dictionary GeolocationSensorReading {
   double? heading;
   double? speed;
 };
+
+dictionary GeolocationReadingValues {
+  required double? latitude;
+  required double? longitude;
+  required double? altitude;
+  required double? accuracy;
+  required double? altitudeAccuracy;
+  required double? heading;
+  required double? speed;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/gyroscope.idl b/tests/wpt/web-platform-tests/interfaces/gyroscope.idl
index d71fd367bf0..24cd82c6431 100644
--- a/tests/wpt/web-platform-tests/interfaces/gyroscope.idl
+++ b/tests/wpt/web-platform-tests/interfaces/gyroscope.idl
@@ -15,3 +15,9 @@ enum GyroscopeLocalCoordinateSystem { "device", "screen" };
 dictionary GyroscopeSensorOptions : SensorOptions {
   GyroscopeLocalCoordinateSystem referenceFrame = "device";
 };
+
+dictionary GyroscopeReadingValues {
+  required double? x;
+  required double? y;
+  required double? z;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/magnetometer.idl b/tests/wpt/web-platform-tests/interfaces/magnetometer.idl
index bcc8d4becba..fd29af84767 100644
--- a/tests/wpt/web-platform-tests/interfaces/magnetometer.idl
+++ b/tests/wpt/web-platform-tests/interfaces/magnetometer.idl
@@ -27,3 +27,18 @@ interface UncalibratedMagnetometer : Sensor {
   readonly attribute double? yBias;
   readonly attribute double? zBias;
 };
+
+dictionary MagnetometerReadingValues {
+  required double? x;
+  required double? y;
+  required double? z;
+};
+
+dictionary UncalibratedMagnetometerReadingValues {
+  required double? x;
+  required double? y;
+  required double? z;
+  required double? xBias;
+  required double? yBias;
+  required double? zBias;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/orientation-sensor.idl b/tests/wpt/web-platform-tests/interfaces/orientation-sensor.idl
index 49acba9e201..a9aec968e0a 100644
--- a/tests/wpt/web-platform-tests/interfaces/orientation-sensor.idl
+++ b/tests/wpt/web-platform-tests/interfaces/orientation-sensor.idl
@@ -24,3 +24,10 @@ interface AbsoluteOrientationSensor : OrientationSensor {
 [Constructor(optional OrientationSensorOptions sensorOptions), SecureContext, Exposed=Window]
 interface RelativeOrientationSensor : OrientationSensor {
 };
+
+dictionary AbsoluteOrientationReadingValues {
+  required FrozenArray<double>? quaternion;
+};
+
+dictionary RelativeOrientationReadingValues : AbsoluteOrientationReadingValues {
+};
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/claim-fetch.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/claim-fetch.https.html
index 6b7d353c6ae..400b593ac96 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/claim-fetch.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/claim-fetch.https.html
@@ -7,66 +7,80 @@
 <body>
 <script>
 
-promise_test(function(t) {
-  var frame;
-  var resource = 'simple.txt';
+async function try_fetch(fetch_func, path) {
+  let response;
+  try {
+   response = await fetch_func(path);
+  } catch (err) {
+    throw (`fetch() threw: ${err}`);
+  }
 
-  var worker;
-  var scope = 'resources/';
-  var script = 'resources/claim-worker.js';
+  let response_text;
+  try {
+   response_text = await response.text();
+  } catch (err) {
+   throw (`text() threw: ${err}`);
+  }
 
-  return Promise.resolve()
-    // Create the test iframe.
-    .then(() => with_iframe('resources/blank.html'))
-    .then(f => frame = f)
+  return response_text;
+}
 
-    // Check the controller and test with fetch.
-    .then(() => assert_equals(frame.contentWindow.navigator.controller,
-                              undefined,
-                              'Should have no controller.'))
-    .then(() => frame.contentWindow.fetch(resource))
-    .then(response => response.text())
-    .then(response_text => assert_equals(response_text,
-                                         'a simple text file\n',
-                                         'fetch() should not be intercepted.'))
+promise_test(async function(t) {
+  let frame;
+  const scope = 'resources/';
+  const script = 'resources/claim-worker.js';
+  t.add_cleanup(async () => {
+    if (frame)
+      frame.remove();
+    return service_worker_unregister(t, scope);
+  });
 
-    // Register a service worker.
-    .then(() => service_worker_unregister_and_register(t, script, scope))
-    .then(r => {
-        t.add_cleanup(() => service_worker_unregister(t, scope));
+  const resource = 'simple.txt';
 
-        worker = r.installing;
+  // Create the test frame.
+  await service_worker_unregister(t, scope);
+  frame = await with_iframe('resources/blank.html');
 
-        return wait_for_state(t, worker, 'activated');
-      })
-    // Let the service worker claim the iframe.
-    .then(() => {
-      var channel = new MessageChannel();
-      var saw_message = new Promise(function(resolve) {
-        channel.port1.onmessage = t.step_func(function(e) {
-          assert_equals(e.data, 'PASS',
-                        'Worker call to claim() should fulfill.');
-          resolve();
-        });
-      });
-      worker.postMessage({port: channel.port2}, [channel.port2]);
-      return saw_message;
-    })
+  // Check the controller and test with fetch.
+  assert_equals(frame.contentWindow.navigator.controller, undefined,
+                'Should have no controller.');
+  let response;
+  try {
+    response = await try_fetch(frame.contentWindow.fetch, resource);
+  } catch (err) {
+    assert_unreached(`uncontrolled fetch failed: ${err}`);
+  }
+  assert_equals(response, 'a simple text file\n',
+                'fetch() should not be intercepted.');
 
-    // Check the controller and test with fetch.
-    .then(() => frame.contentWindow.navigator.serviceWorker.getRegistration(scope))
-    .then(r => assert_equals(frame.contentWindow.navigator.serviceWorker.controller,
-                             r.active,
-                             'Test iframe should be claimed.'))
-    .then(() => frame.contentWindow.fetch(resource))
-    .then(response => response.text())
-    .then(response_text => assert_equals(response_text,
-                                         'Intercepted!',
-                                         'fetch() should be intercepted.'))
+  // Register a service worker.
+  const registration = await navigator.serviceWorker.register(script, {scope});
+  const worker = registration.installing;
+  await wait_for_state(t, worker, 'activated');
 
-    // Cleanup this testcase.
-    .then(() => frame.remove())
-}, 'fetch() should be intercepted after the client is claimed.')
+  // Tell the service worker to claim the iframe.
+  const saw_message = new Promise((resolve) => {
+    const channel = new MessageChannel();
+    channel.port1.onmessage = t.step_func((event) => {
+      resolve(event.data);
+    });
+    worker.postMessage({port: channel.port2}, [channel.port2]);
+  });
+  const data = await saw_message;
+  assert_equals(data, 'PASS', 'Worker call to claim() should fulfill.');
+
+  // Check the controller and test with fetch.
+  const controller = frame.contentWindow.navigator.serviceWorker.controller;
+  assert_true(controller instanceof frame.contentWindow.ServiceWorker,
+              'iframe should be controlled.');
+  try {
+    response = await try_fetch(frame.contentWindow.fetch, resource);
+  } catch (err) {
+    assert_unreached(`controlled fetch failed: ${err}`);
+  }
+  assert_equals(response, 'Intercepted!',
+                'fetch() should be intercepted.');
+}, 'fetch() should be intercepted after the client is claimed.');
 
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/tools/ci/tag_master.py b/tests/wpt/web-platform-tests/tools/ci/tag_master.py
index 72bafd3a866..0ae2801dfe7 100644
--- a/tests/wpt/web-platform-tests/tools/ci/tag_master.py
+++ b/tests/wpt/web-platform-tests/tools/ci/tag_master.py
@@ -17,9 +17,9 @@ logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
 
-def get_pr(repo, owner, sha):
+def get_pr(owner, repo, sha):
     url = ("https://api.github.com/search/issues?q=type:pr+is:merged+repo:%s/%s+sha:%s" %
-           (repo, owner, sha))
+           (owner, repo, sha))
     try:
         resp = urllib2.urlopen(url)
         body = resp.read()
@@ -51,11 +51,11 @@ def get_pr(repo, owner, sha):
     return pr["number"]
 
 
-def tag(repo, owner, sha, tag):
+def tag(owner, repo, sha, tag):
     data = json.dumps({"ref": "refs/tags/%s" % tag,
                        "sha": sha})
     try:
-        url = "https://api.github.com/repos/%s/%s/git/refs" % (repo, owner)
+        url = "https://api.github.com/repos/%s/%s/git/refs" % (owner, repo)
         req = urllib2.Request(url, data=data)
 
         base64string = base64.b64encode(os.environ["GH_TOKEN"])
diff --git a/tests/wpt/web-platform-tests/tools/manifest/vcs.py b/tests/wpt/web-platform-tests/tools/manifest/vcs.py
index 69eb9ab8ecb..69c7a79076b 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/vcs.py
+++ b/tests/wpt/web-platform-tests/tools/manifest/vcs.py
@@ -50,8 +50,8 @@ class Git(object):
                 return subprocess.check_output(full_cmd, cwd=repo_path, stderr=subprocess.STDOUT)
             except Exception as e:
                 if platform.uname()[0] == "Windows" and isinstance(e, WindowsError):
-                        full_cmd[0] = "git.bat"
-                        return subprocess.check_output(full_cmd, cwd=repo_path, stderr=subprocess.STDOUT)
+                    full_cmd[0] = "git.bat"
+                    return subprocess.check_output(full_cmd, cwd=repo_path, stderr=subprocess.STDOUT)
                 else:
                     raise
         return git
diff --git a/tests/wpt/web-platform-tests/tools/requirements_flake8.txt b/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
index 00d182e2d0f..970f00416dc 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_flake8.txt
@@ -1,4 +1,4 @@
 flake8==3.6.0
-pycodestyle==2.4.0
+pycodestyle==2.5.0
 pyflakes==2.1.0
 pep8-naming==0.7.0
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/tests/test_config.py b/tests/wpt/web-platform-tests/tools/wptserve/tests/test_config.py
index 45f138f131d..85271c3a4b3 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/tests/test_config.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/tests/test_config.py
@@ -374,9 +374,9 @@ def test_ssl_env_openssl():
 
 
 def test_ssl_env_bogus():
-        with pytest.raises(ValueError):
-            with config.ConfigBuilder(ssl={"type": "foobar"}):
-                pass
+    with pytest.raises(ValueError):
+        with config.ConfigBuilder(ssl={"type": "foobar"}):
+            pass
 
 
 def test_pickle():
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html
new file mode 100644
index 00000000000..8aa73552aab
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/automation-changes.html
@@ -0,0 +1,140 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Panner Node Automation</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="../../resources/audit-util.js"></script>
+    <script src="../../resources/audit.js"></script>
+  </head>
+
+  <body>
+    <script>
+      // Use a power-of-two to eliminate some round-off; otherwise, this isn't
+      // really important.
+      const sampleRate = 16384;
+
+      // Render enough for the test; we don't need a lot.
+      const renderFrames = 2048;
+
+      // Initial panner positionX and final positionX for listener.
+      const positionX = 2000;
+
+      const audit = Audit.createTaskRunner();
+
+      // Test that listener.positionX.value setter does the right thing.
+      audit.define('Set Listener.positionX.value', (task, should) => {
+        const context = new OfflineAudioContext(2, renderFrames, sampleRate);
+
+        createGraph(context);
+
+        // Frame at which the listener instantaneously moves to a new location.
+        const moveFrame = 512;
+
+        context.suspend(moveFrame / context.sampleRate)
+            .then(() => {
+              context.listener.positionX.value = positionX;
+            })
+            .then(() => context.resume());
+
+        verifyOutput(context, moveFrame, should, 'listenr.positionX.value')
+            .then(() => task.done());
+      });
+
+      // Test that listener.positionX.setValueAtTime() does the right thing.
+      audit.define('Listener.positionX.setValue', (task, should) => {
+        const context = new OfflineAudioContext(2, renderFrames, sampleRate);
+
+        createGraph(context);
+
+        // Frame at which the listener instantaneously moves to a new location.
+        const moveFrame = 512;
+
+        context.listener.positionX.setValueAtTime(
+            positionX, moveFrame / context.sampleRate);
+
+        verifyOutput(
+            context, moveFrame, should, 'listener.positionX.setValueATTime')
+            .then(() => task.done());
+      });
+
+      // Test that listener.setPosition() does the right thing.
+      audit.define('Listener.setPosition', (task, should) => {
+        const context = new OfflineAudioContext(2, renderFrames, sampleRate);
+
+        createGraph(context);
+
+        // Frame at which the listener instantaneously moves to a new location.
+        const moveFrame = 512;
+
+        context.suspend(moveFrame / context.sampleRate)
+            .then(() => {
+              context.listener.setPosition(positionX, 0, 0);
+            })
+            .then(() => context.resume());
+
+        verifyOutput(context, moveFrame, should, 'listener.setPostion')
+            .then(() => task.done());
+      });
+
+      audit.run();
+
+
+      // Create the basic graph for testing which consists of an oscillator node
+      // connected to a panner node.
+      function createGraph(context) {
+        const listener = context.listener;
+
+        listener.positionX.value = 0;
+        listener.positionY.value = 0;
+        listener.positionZ.value = 0;
+
+        const src = new OscillatorNode(context);
+
+        const panner = new PannerNode(context, {
+          distanceModel: 'linear',
+          refDistance: 1,
+          maxDistance: 3000,
+          positionX: positionX,
+          positionY: 0,
+          positionZ: 0
+        });
+        src.connect(panner).connect(context.destination);
+
+        src.start();
+      }
+
+
+      // Verify the output from the panner is correct.
+      function verifyOutput(context, moveFrame, should, prefix) {
+        return context.startRendering().then(resultBuffer => {
+          // Get the outputs (left and right)
+          const c0 = resultBuffer.getChannelData(0);
+          const c1 = resultBuffer.getChannelData(1);
+
+          // The src/listener set up is such that audio should only come
+          // from the right for until |moveFrame|.  Hence the left channel
+          // should be 0 (or very nearly 0).
+          const zero = new Float32Array(moveFrame);
+
+          should(
+              c0.slice(0, moveFrame), `${prefix}: output0[0:${moveFrame - 1}]`)
+              .beCloseToArray(zero, {absoluteThreshold: 1e-16});
+          should(
+              c1.slice(0, moveFrame), `${prefix}: output1[0:${moveFrame - 1}]`)
+              .notBeConstantValueOf(0);
+
+          // At |moveFrame| and beyond, the listener and source are at the
+          // same position, so the outputs from the left and right should be
+          // identical, and the left channel should not be 0 anymore.
+
+          should(c0.slice(moveFrame), `${prefix}: output0[${moveFrame}:]`)
+              .notBeConstantValueOf(0);
+          should(c1.slice(moveFrame), `${prefix}: output1[${moveFrame}:]`)
+              .beCloseToArray(c0.slice(moveFrame));
+        });
+      }
+    </script>
+  </body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/webrtc-quic/RTCQuicStream.https.html b/tests/wpt/web-platform-tests/webrtc-quic/RTCQuicStream.https.html
index b62377f0ced..563d74a2080 100644
--- a/tests/wpt/web-platform-tests/webrtc-quic/RTCQuicStream.https.html
+++ b/tests/wpt/web-platform-tests/webrtc-quic/RTCQuicStream.https.html
@@ -500,18 +500,6 @@ function generateData(amount) {
   return data;
 }
 
-// Writes |amount| of bytes to the given RTCQuicStream in maxWriteBufferedAmount
-// chunks.
-async function writeGeneratedData(stream, amount) {
-  const data = generateData(Math.min(stream.maxWriteBufferedAmount, amount));
-  while (amount > 0) {
-    const chunkSize = Math.min(stream.maxWriteBufferedAmount, amount);
-    await stream.waitForWriteBufferedAmountBelow(0);
-    stream.write({ data: data.subarray(0, chunkSize) });
-    amount -= chunkSize;
-  }
-}
-
 promise_test(async t => {
   const [ localQuicTransport, remoteQuicTransport ] =
       await makeTwoConnectedQuicTransports(t);
@@ -535,22 +523,6 @@ promise_test(async t => {
     finReadBuffer, data.subarray(5, data.length));
 }, 'readInto() reads out finish after reading all data.');
 
-promise_test(async t => {
-  const [ localQuicTransport, remoteQuicTransport ] =
-      await makeTwoConnectedQuicTransports(t);
-  const localStream = localQuicTransport.createStream();
-  const remoteWatcher = new EventWatcher(t, remoteQuicTransport, 'quicstream');
-  writeGeneratedData(localStream, localStream.maxReadBufferedAmount);
-  const { stream: remoteStream } = await remoteWatcher.wait_for('quicstream');
-  await remoteStream.waitForReadable(localStream.maxReadBufferedAmount);
-  const readBuffer = new Uint8Array(localStream.maxReadBufferedAmount);
-  assert_object_equals(
-      remoteStream.readInto(readBuffer),
-      { amount: localStream.maxReadBufferedAmount, finished: false } );
-  assert_array_equals(
-      readBuffer, generateData(localStream.maxReadBufferedAmount));
-}, 'Read maxReadBufferedAmount bytes all at once.');
-
 promise_test(async t => {
   const [ localQuicTransport, remoteQuicTransport ] =
       await makeTwoConnectedQuicTransports(t);
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCIceTransport-extension.https.html b/tests/wpt/web-platform-tests/webrtc/RTCIceTransport-extension.https.html
index e9e70379a48..0d54c8b0239 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCIceTransport-extension.https.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCIceTransport-extension.https.html
@@ -255,6 +255,26 @@ promise_test(async t => {
   ]);
 }, 'Two RTCIceTransports connect to each other');
 
+['controlling', 'controlled'].forEach(role => {
+  promise_test(async t => {
+    const [ localTransport, remoteTransport ] =
+        makeAndGatherTwoIceTransports(t);
+    localTransport.start(remoteTransport.getLocalParameters(), role);
+    localTransport.start(remoteTransport.getLocalParameters(), role);
+    const localWatcher = new EventWatcher(t, localTransport, 'statechange');
+    const remoteWatcher = new EventWatcher(t, remoteTransport, 'statechange');
+    await Promise.all([
+      localWatcher.wait_for('statechange').then(() => {
+        assert_equals(localTransport.state, 'connected');
+      }),
+      remoteWatcher.wait_for('statechange').then(() => {
+        assert_equals(remoteTransport.state, 'connected');
+      }),
+    ]);
+  }, `Two RTCIceTransports configured with the ${role} role resolve the ` +
+      'conflict in band and still connect.');
+});
+
 promise_test(async t => {
   async function waitForConnectedThenSelectedCandidatePairChange(t, transport,
       transportName) {