select-multiple-hover-selected.html

<!DOCTYPE html>
<meta name="color-scheme" content="light dark">
<script src="../../resources/common.js"></script>
<script src="../../../../resources/run-after-layout-and-paint.js"></script>
<body>

<select multiple>
  <optgroup label="unstyled">
    <option selected id="hoverTarget">selected (hovered)</option>
    <option>unselected</option
  </optgroup>
</select>

<script>
  runAfterLayoutAndPaint(function () {
    let hoverTarget = document.getElementById('hoverTarget');
    hoverOverElement(hoverTarget);
  }, true);
</script>
</body>

chromium/third_party/blink/web_tests/fast/forms/color-scheme/select/select-multiple-hover-selected.html