K.v.S. wrote: Is this the reason I get the incomplete coverage result, and how do I cope with it? That is plausible. You could add tests for the base class itself. Or you could add another derived class that does need the specific base class code, and test it. :) Luc Pattyn [Forum Guidelines] [My Articles] The quality and detail of your question reflects on the effectiveness of the help you are likely to get. Show formatted code inside PRE tags, and give clear symptoms when describing a problem.