LayoutTests/fast/css/container-query-listbox-expected.html

<style>
select {
    width: 300px;
}

#option {
    color: blue;
}
</style>
<p>Test passes if there is the second option is blue.</p>
<select multiple id="select">
    <option>A</option>
    <option id="option">B</option>
    <option>C</option>
    <option>D</option>
</select>
<script>