<style>
span {
    z-index: 10;
    background: orange;
    position: relative;
    opacity: 0.5;
    font-size: 100px;
}
div {
    z-index: 5;
    width: 100px;
    height: 100px;
    background: green;
    position: relative;
    top: -10px;
}
</style><span id="inline-stacking-context">hello</span><div></div>
<script src="../include.js"></script>
<script>
    test(() => {
        println(internals.hitTest(50, 50).node.parentNode === document.getElementById("inline-stacking-context"));
    });
</script>