All reports of unknown-testsuite for the archive. The extended description of this tag is:
The dsc file sets Testsuite to an unrecognised value. This field is most probably copied by dpkg-source from Testsuite in debian/control.
Refer to https://salsa.debian.org/ci-team/autopkgtest/tree/master/doc/README.package-tests.rst for details.
This tag has not been emitted in any package tested by Lintian.