chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-178.xml

<?xml-stylesheet href="css3-modsel-178.css" type="text/css"?>
<test>
 <div xmlns="http://www.w3.org/1999/xhtml">
  <p>This line should be green.</p>
 </div>
</test>