What about providing a test target in debian/rules and hooking into this automatically with pdebuild. You should be able to run tests from within the chroot without having to modify your debian/control file.
-- Noah Slater, http://tumbolia.org/nslater -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org