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diff --git a/testing/web-platform/tests/dom/nodes/Document-createEvent.https.html b/testing/web-platform/tests/dom/nodes/Document-createEvent.https.html
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+++ b/testing/web-platform/tests/dom/nodes/Document-createEvent.https.html
@@ -0,0 +1,170 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Document.createEvent</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-document-createevent">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="Document-createEvent.js"></script>
+<div id="log"></div>
+<script>
+function supportsTouchEvents(isTouchEvent) {
+  if (isTouchEvent) {
+    assert_implements_optional('ontouchstart' in document, "'expose legacy touch event APIs'");
+  }
+}
+function testAlias(arg, iface, isTouchEvent) {
+  var ev;
+  test(function() {
+    supportsTouchEvents(isTouchEvent);
+    ev = document.createEvent(arg);
+    assert_equals(Object.getPrototypeOf(ev), window[iface].prototype);
+  }, arg + " should be an alias for " + iface + ".");
+  test(function() {
+    supportsTouchEvents(isTouchEvent);
+    assert_equals(ev.type, "",
+                  "type should be initialized to the empty string");
+    assert_equals(ev.target, null,
+                  "target should be initialized to null");
+    assert_equals(ev.currentTarget, null,
+                  "currentTarget should be initialized to null");
+    assert_equals(ev.eventPhase, 0,
+                  "eventPhase should be initialized to NONE (0)");
+    assert_equals(ev.bubbles, false,
+                  "bubbles should be initialized to false");
+    assert_equals(ev.cancelable, false,
+                  "cancelable should be initialized to false");
+    assert_equals(ev.defaultPrevented, false,
+                  "defaultPrevented should be initialized to false");
+    assert_equals(ev.isTrusted, false,
+                  "isTrusted should be initialized to false");
+  }, "createEvent('" + arg + "') should be initialized correctly.");
+}
+aliases.TouchEvent = 'TouchEvent';
+for (var alias in aliases) {
+  var isTouchEvent = alias === 'TouchEvent';
+  var iface = aliases[alias];
+  testAlias(alias, iface, isTouchEvent);
+  testAlias(alias.toLowerCase(), iface, isTouchEvent);
+  testAlias(alias.toUpperCase(), iface, isTouchEvent);
+
+  if (alias[alias.length - 1] != "s") {
+    var plural = alias + "s";
+    if (!(plural in aliases)) {
+      test(function () {
+        assert_throws_dom("NOT_SUPPORTED_ERR", function () {
+          var evt = document.createEvent(plural);
+        });
+      }, 'Should throw NOT_SUPPORTED_ERR for pluralized legacy event interface "' + plural + '"');
+    }
+  }
+}
+
+test(function() {
+  assert_throws_dom("NOT_SUPPORTED_ERR", function() {
+    var evt = document.createEvent("foo");
+  });
+  assert_throws_dom("NOT_SUPPORTED_ERR", function() {
+    // 'LATIN CAPITAL LETTER I WITH DOT ABOVE' (U+0130)
+    var evt = document.createEvent("U\u0130Event");
+  });
+  assert_throws_dom("NOT_SUPPORTED_ERR", function() {
+    // 'LATIN SMALL LETTER DOTLESS I' (U+0131)
+    var evt = document.createEvent("U\u0131Event");
+  });
+}, "Should throw NOT_SUPPORTED_ERR for unrecognized arguments");
+
+/*
+ * The following are event interfaces which do actually exist, but must still
+ * throw since they're absent from the table in the spec for
+ * document.createEvent().  This list is not exhaustive, but includes all
+ * interfaces that it is known some UA does or did not throw for.
+ */
+var someNonCreateableEvents = [
+  "AnimationEvent",
+  "AnimationPlaybackEvent",
+  "AnimationPlayerEvent",
+  "ApplicationCacheErrorEvent",
+  "AudioProcessingEvent",
+  "AutocompleteErrorEvent",
+  "BeforeInstallPromptEvent",
+  "BlobEvent",
+  "ClipboardEvent",
+  "CloseEvent",
+  "CommandEvent",
+  "DataContainerEvent",
+  "ErrorEvent",
+  "ExtendableEvent",
+  "ExtendableMessageEvent",
+  "FetchEvent",
+  "FontFaceSetLoadEvent",
+  "GamepadEvent",
+  "GeofencingEvent",
+  "IDBVersionChangeEvent",
+  "InstallEvent",
+  "KeyEvent",
+  "MIDIConnectionEvent",
+  "MIDIMessageEvent",
+  "MediaEncryptedEvent",
+  "MediaKeyEvent",
+  "MediaKeyMessageEvent",
+  "MediaQueryListEvent",
+  "MediaStreamEvent",
+  "MediaStreamTrackEvent",
+  "MouseScrollEvent",
+  "MutationEvent",
+  "NotificationEvent",
+  "NotifyPaintEvent",
+  "OfflineAudioCompletionEvent",
+  "OrientationEvent",
+  "PageTransition", // Yes, with no "Event"
+  "PageTransitionEvent",
+  "PointerEvent",
+  "PopStateEvent",
+  "PopUpEvent",
+  "PresentationConnectionAvailableEvent",
+  "PresentationConnectionCloseEvent",
+  "ProgressEvent",
+  "PromiseRejectionEvent",
+  "PushEvent",
+  "RTCDTMFToneChangeEvent",
+  "RTCDataChannelEvent",
+  "RTCIceCandidateEvent",
+  "RelatedEvent",
+  "ResourceProgressEvent",
+  "SVGEvent",
+  "SVGZoomEvent",
+  "ScrollAreaEvent",
+  "SecurityPolicyViolationEvent",
+  "ServicePortConnectEvent",
+  "ServiceWorkerMessageEvent",
+  "SimpleGestureEvent",
+  "SpeechRecognitionError",
+  "SpeechRecognitionEvent",
+  "SpeechSynthesisEvent",
+  "SyncEvent",
+  "TimeEvent",
+  "TrackEvent",
+  "TransitionEvent",
+  "WebGLContextEvent",
+  "WebKitAnimationEvent",
+  "WebKitTransitionEvent",
+  "WheelEvent",
+  "XULCommandEvent",
+];
+someNonCreateableEvents.forEach(function (eventInterface) {
+  test(function () {
+    assert_throws_dom("NOT_SUPPORTED_ERR", function () {
+      var evt = document.createEvent(eventInterface);
+    });
+  }, 'Should throw NOT_SUPPORTED_ERR for non-legacy event interface "' + eventInterface + '"');
+
+  // SVGEvents is allowed, other plurals are not
+  if (eventInterface !== "SVGEvent") {
+    test(function () {
+      assert_throws_dom("NOT_SUPPORTED_ERR", function () {
+        var evt = document.createEvent(eventInterface + "s");
+      });
+    }, 'Should throw NOT_SUPPORTED_ERR for pluralized non-legacy event interface "' + eventInterface + 's"');
+  }
+});
+</script>