Comment 6 for bug 2058401

+1 for enabling build-time testing, but that does not make an autopkgtest.

Autopkgtests should test the package as installed in an Ubuntu system; rebuilding the package (you have Restrictions: build-needed) and re-running the upstream test suite in the build tree adds nothing to the tests run at build time. Moreover you have extra build-deps installed this way, which make the autopkgtest result even less reliable.

It is fine to run the upstream test suite as an autopkgtest, but only if you can can make it use the software installed from the .deb package.