/**
  * Test Suites can contain other Test Suites or just Test Cases.
  *
  * @param  \PHPUnit_Framework_Test $suite [description]
  * @return Boolean
  */
 private function testSuiteContainsOtherSuites($suite)
 {
     $tests = $suite->tests();
     return isset($tests[0]) && $tests[0] instanceof \PHPUnit_Framework_TestSuite;
 }