<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<iframe id="i" src="about:blank"></iframe>
<script>
async_test(t => {
  var form = i.contentDocument.createElement('form');
  form.action = '/common/blank.html';
  i.contentDocument.body.appendChild(form);
  i.onload = t.step_func_done(() => {});
  form.submit();
  new Document().prepend(form);
});
</script>
</body>
