chromium/third_party/blink/web_tests/http/tests/xmlviewer/dumpAsText/xlink.xml

<!-- If you can see this, this test has failed. -->
<test xmlns="http://still-unknown.example.org/">
    <header>This tests that xml viewer is not used when there is an attribute XLink namespace.</header>
    <FAIL/>
    <xlink l:type="simple" l:href="xlink.xml" xmlns:l="http://www.w3.org/1999/xlink">SUCCESS</xlink>
</test>