anchor.diff:    _config.onSummary(passed, failed, errors, testCases, _uncaughtErrorMessage);
     _config.onDone(passed > 0 && failed == 0 && errors == 0 &&
         _uncaughtErrorMessage == null);
  -
  -  _uncaughtErrorMessage = null;
  +  _initialized = false;
   }
   
   String _fullSpec(String spec) {
  
positive.code:  * case it must return a [Future].
   */
  void tearDown(Function teardownTest) {
    _requireNotRunning();
    _testTeardown = teardownTest;
  }
  
  /**
  
negative.code: /** Runs all queued tests, one at a time. */
  void runTests() {
    _ensureInitialized(false);
    _currentTestCaseIndex = 0;
    _currentGroup = '';
  
    // If we are soloing a test, remove all the others.
  