I want to inject a CsvMapper and ObjectMapper from jackson; their relation is that CsvMapper extends ObjectMapper. I am providing them like so:

@Provides
@Singleton
public ObjectMapper provideObjectMapper() {
    return JsonMapper.builder()
            .findAndAddModules()
            .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
            .build();
}

@Provides
@Singleton
public CsvMapper getCsvMapper() {
    return CsvMapper.builder()
               .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
               .build();
}

And using them:

@Mock
private ObjectMapper om;
@Mock
private CsvMapper csvMapper;

@InjectMocks
private ClassToTest classToTest;

However, it shows om has type CsvMapper, so I suspect the DI got confused and injected CsvMapper into om. How can I fix this?