title: JUnit tests pass but PIT says the suite isn't green
body: <p>While trying to run a PIT mutation test I get the following error:</p>
  
  <blockquote>
    <p>mutationCoverage failed: All tests did not pass without mutation when calculating line coverage. Mutation testing requires a green suite.</p>
  </blockquote>
  
  <p>The tests run just fine when I do a normal test build but while running the mutation tests phase they supposedly fail but no details are provided as to why.  I have gone through the reasons listed on the <a href="http://pitest.org/faq/">PIT Testing FAQ</a> but I still have no clue what could be wrong.</p>
  
  <p>I tried:</p>
  
  <ul>
  <li>adding the -Dthreads=1 option to rule of any multi threading issue</li>
  <li>could not find any system properties unique the couple tests that are failing</li>
  <li>the tests are not ignored under normal runs</li>
  </ul>
  
  <p>What are some other things I should try?  Or other ways to debug what could be going on here?</p>