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chromium/third_party/blink/web_tests/compositing/overflow/nested-overflow-clip.html 

<!doctype html>
<style>
  ::-webkit-scrollbar {
    display: none;
  }
</style>
This test passes if there is no red.
<div id="scroller" style="position: absolute; width: 400px; height: 400px; overflow-y: scroll; will-change: transform;">
  <div id="transformed" style="width: 100px; height: 100px; top: 100px; left: 50px; position: absolute; overflow: hidden; transform: rotate(45deg);">
    <!-- This rect should be entirely clipped out. -->
    <div style="width: 100px; height: 100px; top: 100px; left: 50px; position: absolute; background: red;"></div>
  </div>
  <div id="forcescroll" style="height: 1000px;"></div>
</div>