title: How to exclude file from PHPUnit test suite in xml config?
body: <p>I have following, very simple, XML config for PHPUnit:</p>
  
  <pre><code>&lt;phpunit bootstrap="/_tests/TestAutoload.php"&gt;
      &lt;testsuites&gt;
          &lt;testsuite name="Unit Tests"&gt;
              &lt;directory suffix=".php"&gt;_tests&lt;/directory&gt;
          &lt;/testsuite&gt;
      &lt;/testsuites&gt;
  &lt;/phpunit&gt;
  </code></pre>
  
  <p>How to exclude certain file in this directory from test suite? I tried <code>&lt;exclude&gt;</code> and <code>&lt;blacklist&gt;</code>, but it doesn't seem to work in this context. Also couldn't find any other documentation than <a href="http://www.phpunit.de/manual/current/en/" rel="noreferrer">phpunit.de</a> one, which doesn't mention anything about it. Else than that, this config works perfectly.</p>