chromium/src/third_party/blink/web_tests/http/tests/xmlviewer/dumpAsText/mathml.xml

<!-- If you can see this, this test has failed, except if you are
     not using a MathML-aware client. -->
<FAIL xmlns:a="http://www.w3.org/1998/Math/MathML">
    <header>This tests that xml viewer is not used when there is a tag in MATHML namespace.</header>
    <a:math>
        <a:mrow>
            <a:mi>SUCCESS</a:mi>
        </a:mrow>
    </a:math>
</FAIL>