Yes, use Dtos. Here is a common practice example:

    @Test
    void PersonController_FindPersonById() throws Exception {

        PersonDto personDto = new PersonDto(null, "John", "Doe", 28, null);

        long personId = 1;

        when(personService.getPersonById(personId)).thenReturn(personDto);

        ResultActions response = mockMvc.perform(get("/person/1")
                .contentType(MediaType.APPLICATION_JSON)
                .content(objectMapper.writeValueAsString(personDto))
        );

        response.andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.firstname", CoreMatchers.is(personDto.firstname())))
                .andExpect(MockMvcResultMatchers.jsonPath("$.lastname", CoreMatchers.is(personDto.lastname())))
    }