<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Unique identifier (reference)</title>
</head>
<body>

  <p>Test passes if you see the text "PASS".</p>

  <iframe width="100" height="100" frameborder="0" scrolling="no"
          marginheight="0" marginwidth="0"
          src="unique-identifier-1-iframe-2.html#PASS"></iframe>

</body>
</html>