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diff --git a/testing/web-platform/tests/dom/events/EventTarget-dispatchEvent.html b/testing/web-platform/tests/dom/events/EventTarget-dispatchEvent.html
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+++ b/testing/web-platform/tests/dom/events/EventTarget-dispatchEvent.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>EventTarget.dispatchEvent</title>
+<link rel="author" title="Olli Pettay" href="mailto:Olli.Pettay@gmail.com">
+<link rel="author" title="Ms2ger" href="mailto:Ms2ger@gmail.com">
+<link rel="help" href="https://dom.spec.whatwg.org/#dom-eventtarget-dispatchevent">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/dom/nodes/Document-createEvent.js"></script>
+<div id="log"></div>
+<script>
+setup({
+  "allow_uncaught_exception": true,
+})
+
+test(function() {
+  assert_throws(new TypeError(), function() { document.dispatchEvent(null) })
+}, "Calling dispatchEvent(null).")
+
+for (var alias in aliases) {
+  test(function() {
+    var e = document.createEvent(alias)
+    assert_equals(e.type, "", "Event type should be empty string before initialization")
+    assert_throws("InvalidStateError", function() { document.dispatchEvent(e) })
+  }, "If the event's initialized flag is not set, an InvalidStateError must be thrown (" + alias + ").")
+}
+
+var dispatch_dispatch = async_test("If the event's dispatch flag is set, an InvalidStateError must be thrown.")
+dispatch_dispatch.step(function() {
+  var e = document.createEvent("Event")
+  e.initEvent("type", false, false)
+
+  var target = document.createElement("div")
+  target.addEventListener("type", dispatch_dispatch.step_func(function() {
+    assert_throws("InvalidStateError", function() {
+      target.dispatchEvent(e)
+    })
+    assert_throws("InvalidStateError", function() {
+      document.dispatchEvent(e)
+    })
+  }), false)
+
+  assert_equals(target.dispatchEvent(e), true, "dispatchEvent must return true")
+
+  dispatch_dispatch.done()
+})
+
+test(function() {
+  // https://www.w3.org/Bugs/Public/show_bug.cgi?id=17713
+  // https://www.w3.org/Bugs/Public/show_bug.cgi?id=17714
+
+  var e = document.createEvent("Event")
+  e.initEvent("type", false, false)
+
+  var called = []
+
+  var target = document.createElement("div")
+  target.addEventListener("type", function() {
+    called.push("First")
+    throw new Error()
+  }, false)
+
+  target.addEventListener("type", function() {
+    called.push("Second")
+  }, false)
+
+  assert_equals(target.dispatchEvent(e), true, "dispatchEvent must return true")
+  assert_array_equals(called, ["First", "Second"],
+                      "Should have continued to call other event listeners")
+}, "Exceptions from event listeners must not be propagated.")
+
+async_test(function() {
+  var results = []
+  var outerb = document.createElement("b")
+  var middleb = outerb.appendChild(document.createElement("b"))
+  var innerb = middleb.appendChild(document.createElement("b"))
+  outerb.addEventListener("x", this.step_func(function() {
+    middleb.addEventListener("x", this.step_func(function() {
+      results.push("middle")
+    }), true)
+    results.push("outer")
+  }), true)
+  innerb.dispatchEvent(new Event("x"))
+  assert_array_equals(results, ["outer", "middle"])
+  this.done()
+}, "Event listeners added during dispatch should be called");
+
+async_test(function() {
+  var results = []
+  var b = document.createElement("b")
+  b.addEventListener("x", this.step_func(function() {
+    results.push(1)
+  }), true)
+  b.addEventListener("x", this.step_func(function() {
+    results.push(2)
+  }), false)
+  b.addEventListener("x", this.step_func(function() {
+    results.push(3)
+  }), true)
+  b.dispatchEvent(new Event("x"))
+  assert_array_equals(results, [1, 2, 3])
+  this.done()
+}, "Event listeners should be called in order of addition")
+</script>