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chromium/third_party/blink/web_tests/fast/forms/select-popup/popup-menu-appearance-many.html 

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-100">
<script src="../../../resources/testdriver.js"></script>
<script src="../../../resources/testdriver-vendor.js"></script>
<script src="../resources/picker-common.js"></script>

<select></select>

<script>
  window.onload = () => {
    var menu = document.querySelector('select');
    for (var i = 0; i < 200; i++) {
      var option = new Option('item ' + i);
      if (i === 100)
          option.selected = true;
      menu.appendChild(option);
    }
    openPickerAppearanceOnly(menu)
  };
</script>