<!DOCTYPE html>
<title>Layout Instability: parent and overflowing absolute child moved together</title>
<link rel="help" href="https://wicg.github.io/layout-instability/" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/util.js"></script>
<div id="parent" style="position: relative; left: 400px; top: 300px; width: 100px; height: 100px; background: yellow">
  <div id="child" style="position: absolute; top: -300px; left: -400px;