<!DOCTYPE html>
<html>
<head>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script src="/tests/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
<script>
window.addEventListener("load", async function() {
  await promiseApzFlushedRepaints();
  parent.postMessage("ready", "*");
}, { once: true });
</script>
</head>
<body>
</body>
</html>