For me in Spring Boot 2.2.4 (JUnit5) the below seems to have worked and bypass the security filter.
@ExtendWith(SpringExtension.class)
@WebMvcTest(SomeController.class)
@AutoConfigureMockMvc(addFilters = false)
public class SomeControllerTest {
...
Note: this simply disables any filters in the SpringSecurity configuration. It won’t disable the security completely. In other words it will still bootstrap security without loading any filters.