chromium/third_party/blink/web_tests/fast/forms/select/menulist-deselect-update.html

Test result:
<select id="target">
    <option>FAIL</option>
    <option>PASS</option>
</select>
<script type="text/javascript">
    var select = document.getElementById("target");
    select.offsetTop;

    var opts = select.options;
    opts[0].selected = false;
    opts[1].selected = true;
</script>