opacity-change-parent-stacking-context-ref.html

<!doctype HTML>
<title>CSS Test Reference</title>
<link rel="author" title="Chris Harrelson" href="mailto:[email protected]" />
<div style="width: 100px; height: 100px; background: lightblue; will-change: transform; position: absolute">
  <div id=target style="backface-visibility: hidden">
    <div style="width: 50px; height: 50px; background: lightgray; top: 75px; position: relative"></div>
  </div>
</div>

chromium/third_party/blink/web_tests/external/wpt/css/CSS2/stacking-context/opacity-change-parent-stacking-context-ref.html