chromium/third_party/blink/web_tests/fast/css/containment/paint-containment-mutation-invalidates-layout-expected.html

<!DOCTYPE html>
<style>
#container {
    width: 100px;
    height: 100px;
    background: green;
}
</style>
<div id="container">
</div>
This test verifies changing CSS containment correctly invalidates layout.