Hey @sarmbruster I'm feeling a bit nitpicky, hopefully in a constructive way: the fact that PFB uses a LinkedHashSet is an implementation detail, it's _how_  the ordering is achieved. The test asserts that the result is ordered, without caring about such a detail.. If you'd rename the test to something like _shouldRetainRegistrationOrderOfThirdPartyJaxRsPackages_, you specify the expectation towards the interface and the intend becomes clear right away to someone else reading the code (or your future self ;-) ). Hope that is helpful.