Is it possible to test a class normally when it has more than 20 dependencies in the constructor?

Question

Unit testing

$this->entityManager = $entityManager;
        $this->userRepository = $userRepository;
        $this->mailService = $mailService;
        $this->tokenStorage = $tokenStorage;
        $this->session = $session;
        $this->logger = $logger;
        $this->tokenManager = $tokenManager;
        $this->userFactory = $userFactory;
        $this->profileScoreManager = $profileScoreManager;
        $this->googleTagManager = $googleTagManager;
        $this->trackingDataFactory = $trackingDataFactory;
        $this->typeaheadManager = $typeaheadManager;
        $this->requestStack = $requestStack;
        $this->messageManager = $messageManager;
        $this->userChecker = $userChecker;
...

And how to test this, there are too many mocks.