As threatened, I have written and uploaded an improved replacement for Module::Install::AuthorTests. It's Module::Install::ExtraTests. It's scary and probably somewhat ill-advised, but it seems to work just fine. It takes away some of the configurability of AuthorTests, but it's way more useful, I think.
Basically, you add one line to your Makefile.PL:
That tells it that you might have something like this:
The author tests would only be run when run in the author's working copy (a
concept dealt with by Module::Install). The release tests are only run during
make disttest, when RELEASE_TESTING has been set. The smoke tests are only
run during smoke testing, when AUTOMATED_TESTING has been set.
Making this work required doing ugly things. I'm not sure how reliable it will be, but I'll make a release or two of things using it, in the next few days, and we'll see what happens.