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chromium/third_party/blink/web_tests/fast/spatial-navigation/snav-disappear-after-hover.html 

<!DOCTYPE html>
<style>
  #btn1:hover {
    visibility: hidden;
  }

  #btn2:hover {
    display: none;
  }
</style>

<button id="btn0">Button 0</button>
<button id="btn1">Button 1</button>
<button id="btn2">Button 2</button>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/snav-testharness.js"></script>
<script>
  var resultMap = [
    ["Right", "btn0"],
    ["Right", "btn1"],
    ["Right", "btn2"]
  ];

  snav.assertFocusMoves(resultMap);
</script>