....

public function tearDown() {
	if (!$this->persistenceManager instanceof \TYPO3\Flow\Persistence\PersistenceManagerInterface){
		$this->persistenceManager = $this->objectManager->get('TYPO3\Flow\Persistence\PersistenceManagerInterface');
	};
	if (!$this->playerRepository instanceof \TomasNorre\GolfnetInvitational\Domain\Repository\PlayerRepository){
		$this->playerRepository = $this->objectManager->get('TomasNorre\GolfnetInvitational\Domain\Repository\PlayerRepository');
	};
	$this->playerRepository->removeAll();
	$this->persistenceManager->persistAll();
	unset($this->playerRepository);
	unset($this->persistenceManager);
}