<style>
.sibling {
  will-change: transform;
}

#changeThis {
  font-family: Monospace;
  position: relative;
}
</style>
<div class=sibling></div>
<div><span id=changeThis>PASS if this text ends in '1': 0</span></div>
<script src="../../resources/ui-helper.js"></script>
<script>
if (window.testRunner)
  testRunner.waitUntilDone();

async function runTest() {
  document.body.offsetHeight;
  await UIHelper.renderingUpdate();
  changeThis.firstChild.nodeValue = "PASS if this text ends in '1': 1";
  await UIHelper.renderingUpdate();
  if (window.testRunner)
    testRunner.notifyDone();
}

window.addEventListener('load', runTest);
</script>