Unable to unit test a spring service calling mocked custom repository

Question

I defined a custom repository Interface which get stream of entities through Query.getResultStream

public interface MyRepository<T> {
   Stream<T> findByCriteria(...);
}

public class MyRepositoryImpl<T> implements MyRepository<T> {

   @Autowired SessionFactory sessionFactory;

   public Stream<T> findByCriteria(...) {
     ...
   }
}

and my Repository & Service

@Repository
public interface EntityRepository extends MyRepository<Entity> {
  ...
}

@Service
@Transactional(readOnly = true)
public class EntityService {
  @Autowired EntityRepository entityRepository;

  public Stream<Entity> getEntitiesByCriteria(String criteria) {
    ...
    return entityRepository.findByCriteria(...);
  }
}

Problem is my Service Unit Test does not see the repository implementation, and always return null without going inside findByCriteria implementation.

ExtendWith(MockitoExtension.class)
class EntityServiceTest {
  @InjectMocks EntityService service;
  @Mock EntityRepository repository;

  @Test
  void test() {
    ...
    when(repository.findByCriteria(...))
        .thenReturn(...);

    service.getEntitiesByCriteria(...); //This does not see the implementation of findByCriteria in MyRepositoryImpl

  ]

}

I tried many annotations like @RepositoryDefinition in my interface or @EnableJpaRepositories in my test class but nothing seems to work