Nikolay Sivov (@nsivov) commented about dlls/combase/tests/roapi.c:
IAgileReference_Release(agile_reference); EXPECT_REF(&unk_obj, 1);
/* Test marshaling WinRT interfaces. */
hr = RoGetActivationFactory(str, &IID_IApiInformationStatics, (void **)&statics);
I don't think we need this test, there is nothing special about those interfaces. If IAgileObject is supported, the rest is the same for any kind of objects.