In open distributed environments such as in OSI network management, a procedure of conformance testing is essential for increasing the level of confidence that component implementations from different sources actually meet their specifications as a prerequisite for their ability to interact as intended. This applies not only to OSI communication protocols but also to open management information. In particular, this includes relationships between managed objects, an aspect which has been largely ignored so far but which deserves particular attention and which we therefore focus on in this paper. Using the OSI General Relationship Model as a basis, we discuss how respective conformance requirements can be identified which serve as a starting point for the development of test cases.