title: PHPUnit reports no tests run, then runs tests
body: <p>I have an interesting (but ultimately harmless) problem: PHPUnit will report that no tests were executed, and then proceed to read the config file and run the tests, giving an output as below.</p>
  
  <p>It would appear that PHPUnit is exiting and then resuming for some reason. I've looked through my bootstrap process and log files I can't see anything which would cause PHPUnit to exit (an exception or exit statement or the like).</p>
  
  <p>The tests are being run from the tests directory, using the PHPUnit phar: <code>php ../phpunit.phar -c phpunit.xml</code></p>
  
  <p><strong>Has anybody seen this behaviour before? What was the problem?</strong> Ultimately, this isn't harming anything at all, I'm just curious as to what's going on.</p>
  
  <pre><code>PHPUnit 3.7.34 by Sebastian Bergmann.
  
  
  
  Time: 2.18 seconds, Memory: 23.50Mb
  
  No tests executed!
  PHPUnit 3.7.34 by Sebastian Bergmann.
  
  Configuration read from /path/to/phpunit.xml
  
  .............................................................   61 / 2630 (  2%)
  .............................................................  122 / 2630 (  4%)
  .. and so on ..
  </code></pre>
  
  <p>The configuration files also appears to be OK, since the tests do run. </p>
  
  <pre><code>&lt;phpunit
      colors="true"
      bootstrap="/path/to/application/bootstrap.php"
      backupGlobals="false"
  &gt;
      &lt;testsuites&gt;
          &lt;testsuite name="Unit Tests"&gt;
              &lt;directory&gt;./&lt;/directory&gt;
          &lt;/testsuite&gt;
      &lt;/testsuites&gt;
  &lt;/phpunit&gt;
  </code></pre>