diff --git a/fullscreen/api/document-exit-fullscreen-timing-manual-expected.txt b/fullscreen/api/document-exit-fullscreen-timing-manual-expected.txt
new file mode 100644
index 00000000000000..1a274d04720f8a
--- /dev/null
+++ b/fullscreen/api/document-exit-fullscreen-timing-manual-expected.txt
@@ -0,0 +1,4 @@
+This is a testharness.js-based test.
+FAIL Timing of fullscreenchange and resize events assert_array_equals: event order lengths differ, expected 2 got 1
+Harness: the test ran to completion.
+
diff --git a/fullscreen/api/document-exit-fullscreen-timing-manual.html b/fullscreen/api/document-exit-fullscreen-timing-manual.html
new file mode 100644
index 00000000000000..f91eb7e2a76906
--- /dev/null
+++ b/fullscreen/api/document-exit-fullscreen-timing-manual.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<title>Document#exitFullscreen() timing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../trusted-click.js"></script>
+<div id="log"></div>
+<script>
+async_test(t => {
+  const div = document.querySelector('div');
+  trusted_request(div);
+
+  document.onfullscreenchange = t.step_func(() => {
+    // We are now in fullscreen. Exit again.
+    assert_equals(document.fullscreenElement, div);
+    document.exitFullscreen();
+
+    // If fullscreenchange is an animation frame event, then animation frame
+    // callbacks should be run after it is fired, before the timer callback.
+    // The resize event should fire before the fullscreenchange event.
+    const events = [];
+    const callback = t.step_func(event => {
+      events.push(event.type);
+      if (event.type == 'fullscreenchange') {
+        setTimeout(t.unreached_func('timer callback'));
+        requestAnimationFrame(t.step_func_done(() => {
+          assert_array_equals(events, ['resize', 'fullscreenchange'], 'event order');
+        }));
+      }
+    });
+    document.onfullscreenchange = window.onresize = callback;
+  });
+}, 'Timing of fullscreenchange and resize events');
+</script>
diff --git a/fullscreen/api/element-request-fullscreen-timing-manual-expected.txt b/fullscreen/api/element-request-fullscreen-timing-manual-expected.txt
new file mode 100644
index 00000000000000..3fd3954038e036
--- /dev/null
+++ b/fullscreen/api/element-request-fullscreen-timing-manual-expected.txt
@@ -0,0 +1,5 @@
+This is a testharness.js-based test.
+FAIL Timing of fullscreenchange and resize events assert_unreached: timer callback Reached unreachable code
+PASS Timing of fullscreenerror event 
+Harness: the test ran to completion.
+
diff --git a/fullscreen/api/element-request-fullscreen-timing-manual.html b/fullscreen/api/element-request-fullscreen-timing-manual.html
new file mode 100644
index 00000000000000..f92b4f6292898d
--- /dev/null
+++ b/fullscreen/api/element-request-fullscreen-timing-manual.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<title>Element#requestFullscreen() timing</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../trusted-click.js"></script>
+<div id="log"></div>
+<script>
+async_test(t => {
+  trusted_request(document.querySelector('div'));
+
+  // If fullscreenchange is an animation frame event, then animation frame
+  // callbacks should be run after it is fired, before the timer callback.
+  // The resize event should fire before the fullscreenchange event.
+  const events = [];
+  const callback = t.step_func(event => {
+    events.push(event.type);
+    if (event.type == 'fullscreenchange') {
+      setTimeout(t.unreached_func('timer callback'));
+      requestAnimationFrame(t.step_func_done(() => {
+        assert_array_equals(events, ['resize', 'fullscreenchange'], 'event order');
+      }));
+    }
+  });
+  document.onfullscreenchange = window.onresize = callback;
+}, 'Timing of fullscreenchange and resize events');
+
+async_test(t => {
+  document.createElement('a').requestFullscreen();
+
+  // If fullscreenerror is an animation frame event, then animation frame
+  // callbacks should be run after it is fired, before the timer callback.
+  document.onfullscreenerror = t.step_func(() => {
+    setTimeout(t.unreached_func('timer callback'));
+    requestAnimationFrame(t.step_func_done());
+  });
+}, 'Timing of fullscreenerror event');
+</script>
