Spring Boot Repository Test - How to exclude Spring Security Config

I am using the @DataJpaTest annotation feature to test my repositories, following this.

Test Configuration:

@RunWith(SpringRunner.class)
@DataJpaTest
public class UserRepositoryTest {

    @Autowired
    private TestEntityManager entityManager;

    @Autowired
    private UserRepository userRepository;

    @Test
    public void whenFindByName_thenReturnEmployee() {
        ...
    }
}

I have an Oauth2 Security Config as I am developing a REST API.

When I try to run my test, the application context cannot be loaded because of No qualifying bean of type 'org.springframework.security.authentication.AuthenticationManager' available.

That class is part of my @Configuration

@Configuration
@EnableAuthorizationServer
public class AuthorizationAdapter extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager);
    }

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory().withClient(CLIENT_ID).secret(SECRET).authorizedGrantTypes("password", "refresh_token").scopes("global")
                .accessTokenValiditySeconds(180);
    }    
}

I need not to load that kind of configuration, as I don't need it to test my repositories. How can I achieve this?