<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Containment Test: Layout containment stacking context</title>
<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">
<link rel="match" href="../reference/nothing.html">
<meta name=assert content="Elements in which layout containment doesn't apply, do not create a stacking context.">
<style>
rt {
  display: -webkit-ruby-text;
  contain: layout;
  back