@Test
public void testNoCustomBucket() {

    when(validationClient.validateS3BucketAccess(any())).thenReturn(
            Mono.just(S3BucketAccessValidationResponse.getDefaultInstance())
    );
    Set<ValidationError> result = validator.validate(JOB_WITH_DEFAULT_BUCKET).block();
    assertThat(result).isEmpty();
    verify(validationClient, times(0)).validateS3BucketAccess(any());
}