@InjectMocks
    private UserImportService userImportService;

    @Mock
    private UserRepository userRepository;

    @BeforeClass
    public void beforeClass()
    {
        initMocks(this);
    }

    @Test
    public void resendVerificationEmailIfUserIsNotNullAndInactive()
    {
        when(userRepository.findByEmail(anyString())).thenReturn(new User());

        String answer = userImportService.resendVerificationEmail("mail@mail.ru");

        verify(userRepository).save(anyObject());
    }

Error:(97, 31) java: reference to save is ambiguous
  both method <S>save(S) in org.springframework.data.repository.CrudRepository and method <S>save(java.lang.Iterable<S>) in org.springframework.data.jpa.repository.JpaRepository match

verify(userRepository).save(any(User.class));