@TestConfigurationが機能しない

Java、SpringBootアプリケーションを作成しているのですが、コントローラーのテストで行き詰ってしまいました…

HomeControllerTest
1@WebMvcTest(HomeController.class)
2public class HomeControllerTest {
3	
4	@Autowired
5	private MockMvc mockMvc;
6	
7	@MockBean
8	private HomeService homeService;
9	
10	@MockBean
11	private AccountService accountService;
12	
13	@MockBean
14	private UserDetailsManager userDetailsManager;
15	
16	@BeforeEach
17	public void setUp() {
18		
19	}
20	
21	@TestConfiguration
22	static class Config implements WebMvcConfigurer {
23		
24		@Override
25		public void addFormatters(FormatterRegistry registry) {
26			
27		}
28	}
29	
30	@Test
31	public void testShowIndex() throws Exception {
32		
33		mockMvc.perform(get("/manage"))
34			.andExpect(status().isOk())
35			.andExpect(view().name("manage"))
36			.andReturn();
37			
38	}

テストを実行するとコントローラーではなく、DIしているサービスのBean重複エラーが出ました。
AccountServiceのBeanと、AccountServiceTestのBeanが重複しているとのエラーです。

error
1***************************
2APPLICATION FAILED TO START
3***************************
4
5Description:
6
7The bean 'accountService', defined in class path resource [net/dkt/dktsearch/service/AccountServiceTest$Config.class], could not be registered. A bean with that name has already been defined in file [C:\Users\nao\Documents\workspace-spring-tool-suite-4-4.6.2.RELEASE\dktsearch\target\classes\net\dkt\dktsearch\service\AccountService.class] and overriding is disabled.
8
9Action:
10
11Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
12
132021-07-14 09:17:12.098 ERROR 11788 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@34f5090e] to prepare test instance [net.dkt.dktsearch.controller.HomeControllerTest@5eefa415]

しかし、このAccountServiceTestですが、これ自体は問題なく動作しますし、該当のBeanも@TestConfigurationを設定しています。

AccountServiceTest
1@SpringJUnitConfig
2public class AccountServiceTest {
3	
4	@TestConfiguration
5	static class Config {
6		
7		@Bean
8		public AccountService accountService() {
9			
10			return new AccountService();
11		}
12	}
13	
14	@Autowired
15	private AccountService accountService;
16	
17	@MockBean
18	private JdbcTemplate jdbcTemplate;
19	
20	@MockBean
21	private SpringUserService springUserService;
22	
23	@MockBean
24	private AccountRepository accountRepository;
25	
26	@MockBean
27	private TmpAccountRepository tmpAccountRepository;
28	
29	@Test
30	public void testFind() {
31		
32		Account account = new Account();
33		
34		when(accountRepository.findById("test")).thenReturn(Optional.of(account));
35		
36		Account a = accountService.find("test");
37		verify(accountRepository).findById("test");
38	}
39	
40	@Test
41	public void testGetAccountsOfRoleClient() {
42		
43		List<Account> accountList = new ArrayList<>();
44		
45		when(accountRepository.findByType("client")).thenReturn(accountList);
46		
47		List<Account> aList = accountService.getAccountsOfRoleClient();
48		verify(accountRepository).findByType("client");
49	}
50
51}