protected function tearDown()
 {
     if ($this->databaseTester) {
         $this->databaseTester->onTearDown();
         //default null operation - nothing to
         /**
          * Destroy the tester after the test is run to keep DB connections
          * from piling up.
          */
         $this->databaseTester = null;
     }
     parent::tearDown();
 }