Hi @Vabs95-ttn I just ran into this issue as well and created a PR to fix this by providing an implementation for the filtering: https://github.com/apache/sling-org-apache-sling-testing-osgi-mock/pull/7/files Fyi: when an OSGi Mock Service is somehow not doing exactly what is needed / reflects a real world scenario, you can override it by specifying another implementation with a higher service.ranking, so you could have very well created your own implementation and hooked it in there. In case of...