Mock LocalDate.now(clock) injecting using Clock.fixed()

I'm struggling on testing my endpoint when I set a specific date.

I don't want to use PowerMock to mock a static method instead I decided to change the implementation of my service and use the LocalDate.now(Clock clock) implementation in the way to be easier to test it.

I added to my SpringBootApplication class:

@Bean
public Clock clock() {
return Clock.systemDefaultZone();
}

and autowired it my Service

@Autowired
private Clock clock;

and used it in my implementation as that:

LocalDateTime localDate = LocalDateTime.now(clock);

On the test side I mocked the Clock

private final static LocalDate WEEKEND = LocalDate.of(2020, 07, 05);

@Mock
private Clock clock;
private Clock fixedClock;

and used it as that:

MockitoAnnotations.initMocks(this);

//tell your tests to return the specified LOCAL_DATE when calling LocalDate.now(clock)
fixedClock = Clock.fixed(WEEKEND.atTime(9, 5).toInstant(ZoneOffset.UTC), ZoneId.of("CET"));
doReturn(fixedClock.instant()).when(clock).instant();
doReturn(fixedClock.getZone()).when(clock).getZone();

ResponseEntity<String> response = restTemplate.postForEntity(base.toString(), request, String.class);

When I debuged it, the fixedClock has the value which I expected FixedClock[2020-07-05T09:05:00Z,CET]. Instead if I put a breakpoint on the service implementantion, the localDate variable has the value 2020-07-09 - the .now().

My issue is that: why the localDate variable hasn't the value of fixedClock variable?

Thank you very much for your time!