plugins/testng/testData/references/testng.xml

<suite>
  <suite-files>
    <suite-file path="/subPack/test-unit.xml"/>
    <suite-file path="/<error descr="Cannot resolve file 'test-unit.xml'">test-unit.xml</error>"/>
  </suite-files>
  <test>
    <method-selectors>
      <method-selector>
        <selector-class name="<error descr="Cannot resolve class 'foo'">foo</error>"/>
      </method-selector>
    </method-selectors>
    <classes>
      <class name="<error descr="Cannot resolve class 'foo'">foo</error>"/>
      <class name="o.MyTest"/>
    </classes>
  </test>
</suite>