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+++ b/testing/web-platform/tests/long-animation-frame/tentative/loaf-promise.html
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+<!DOCTYPE HTML>
+<meta charset=utf-8>
+<title>Long Animation Frame Timing: promise resolvers</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/utils.js"></script>
+
+<body>
+<h1>Long Animation Frame: promise resolvers</h1>
+<div id="log"></div>
+<script type="module">
+
+const {REMOTE_ORIGIN} = get_host_info();
+
+test_promise_script(async t => {
+    await fetch("/common/dummy.xml");
+    busy_wait(very_long_frame_duration);
+}, "resolve", "Window.fetch.then");
+
+test_promise_script(async t => {
+    const response = await fetch("/common/dummy.xml");
+    await response.text();
+    busy_wait(very_long_frame_duration);
+}, "resolve", "Response.text.then");
+
+test_promise_script(async t => {
+    const response = await fetch("/common/dummy.xml");
+    await response.arrayBuffer();
+    busy_wait(very_long_frame_duration);
+}, "resolve", "Response.arrayBuffer.then");
+
+test_promise_script(async t => {
+    const response = await fetch("/fetch/api/resources/data.json");
+    await response.json();
+    busy_wait(very_long_frame_duration);
+}, "resolve", "Response.json.then");
+
+test_promise_script(async t => {
+    const response = await import("/loading/resources/dummy.js");
+    busy_wait(very_long_frame_duration);
+}, "resolve", "import.then");
+
+test_promise_script(async t => {
+    fetch(new URL("/common/dummy.xml", REMOTE_ORIGIN).href, {mode: "cors"})
+        .catch(() => {
+            busy_wait(very_long_frame_duration);
+        })
+}, "reject", "Window.fetch.catch" );
+</script>
+</body>