title: IntelliJ: Tests not started
body: <p>I'm running a lot of JUnit tests in parallel, and I frequently get results along the lines of
  "N tests passed, M tests failed, P tests not started" (in contrast to <a href="https://stackoverflow.com/questions/11166283/intellij-failed-to-start-0-passed-1-not-started">this question</a>, where no tests start at all).</p>
  
  <p>What can cause this? I tried the "invalidate cache" option, however, this does not appear to solve anything. I should mention that tests take a while longer to run than the average JUnit tests (they can take up to 90 seconds to run), could this have anything to do with it? Right now I simply press "rerun failed tests" until I have forced IntelliJ do run all of them, which is rather cumbersome. I'm not sending anything weird to System.out either, and as I've stated I do get them to run eventually.</p>
  
  <p><strong>It runs tests for about ten minutes, and then no further tests are started. Is there a timeout of some kind somewhere that I can't find?</strong></p>
  
  <p>Sometimes this appears in the console after this happens:</p>
  
  <pre><code>Process finished with exit code 255
  </code></pre>
  
  <p>Version details:</p>
  
  <ul>
  <li>IntelliJ version 13.1.4</li>
  <li>JUnit 4.10</li>
  </ul>