Teste retorna 400 e não 201

Ao rodar a classe de teste abaixo, a asserção falha.

@SpringBootTest
@AutoConfigureMockMvc
@AutoConfigureJsonTesters
class MedicoControllerTest {

    @Autowired
    private MockMvc mvc;

    @Autowired
    private JacksonTester<DadosCadastroMedico> dadosCadastroMedicoJson;

    @Autowired
    private JacksonTester<DadosDetalhamentoMedico> dadosDetalhamentoMedicoJson;

    @MockBean
    private MedicoRepository repository;

    @Test
    @DisplayName("Deveria devolver codigo http 200 quando informacoes estao validas")
    @WithMockUser
    void cadastraCenario2() throws Exception {
        DadosCadastroMedico dadosCadastro = new DadosCadastroMedico("Medico", "medico@voll.med", "61999999999",
                "123456", Especialidade.CARDIOLOGIA, dadosEndereco());

        when(repository.save(any())).thenReturn(new Medico(dadosCadastro));

        MockHttpServletResponse response = mvc.perform(post("/medicos/cadastro").contentType(MediaType.APPLICATION_JSON)
                .content(dadosCadastroMedicoJson.write(dadosCadastro).getJson())).andReturn().getResponse();

        DadosDetalhamentoMedico dadosDetalhamento = new DadosDetalhamentoMedico(null, dadosCadastro.nome(),
                dadosCadastro.email(), dadosCadastro.crm(), dadosCadastro.telefone(), dadosCadastro.especialidade(),
                new Endereco(dadosCadastro.endereco()));
        String jsonEsperado = dadosDetalhamentoMedicoJson.write(dadosDetalhamento).getJson();

        assertThat(response.getStatus()).isEqualTo(HttpStatus.CREATED.value());
        assertThat(response.getContentAsString()).isEqualTo(jsonEsperado);
    }

    private DadosEndereco dadosEndereco() {
        return new DadosEndereco("rua xpto", "bairro", "00000000", "Brasilia", "DF", null, null);
    }

}

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /medicos/cadastro
       Parameters = {}
          Headers = [Content-Type:"application/json;charset=UTF-8", Content-Length:"248"]
             Body = {"nome":"Medico","email":"medico@voll.med","telefone":"61999999999","crm":"123456","especialidade":"CARDIOLOGIA","endereco":{"logradouro":"rua xpto","bairro":"bairro","cep":"00000000","cidade":"Brasilia","uf":"DF","complemento":null,"numero":null}}
    Session Attrs = {}

Handler:
             Type = med.voll.api.controller.MedicoController
           Method = med.voll.api.controller.MedicoController#cadastra(DadosCadastroMedico, UriComponentsBuilder)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = org.springframework.web.bind.MethodArgumentNotValidException

ModelAndView:
        View name = null
             View = null
            Model = null

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 400
    Error message = null
          Headers = [Content-Type:"application/json", X-Content-Type-Options:"nosniff", X-XSS-Protection:"0", Cache-Control:"no-cache, no-store, max-age=0, must-revalidate", Pragma:"no-cache", Expires:"0", X-Frame-Options:"DENY"]
     Content type = application/json
             Body = [{"campo":"endereco.cep","mensagem":"must match \"\\d{5}-\\d{3}\""}]
    Forwarded URL = null
   Redirected URL = null
          Cookies = []
2023-09-18T13:32:00.022-03:00  INFO 8612 --- [ionShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2023-09-18T13:32:00.037-03:00  INFO 8612 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2023-09-18T13:32:00.053-03:00  INFO 8612 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.