My fear in the original post derived from a couple of sentences I read. One was inside a module's documentation, talking about the testing in a similar module ("there are only 5 tests..."), the other stating that "a few dozen of tests should suffice".

Unluckly I cannot produce references, but these sentences stayed in my mind when I came to testing, and having a final count of around 200 for something that wasn't actually that great made me think that I was kinda cheating.

Anyway, I like the attitude you suggest: I'll not worry about these foolish things and keep going on.