Package: lintian Version: 2.121.1 Severity: normal lintian nags me all the time to switch (Build-)Depends from pkg-config to pkgconf, so I was surprised to not see any tags when mpich added autopkgtests for the pkg-config bits (with Depends: pkg-config).
Probably the tests for obsolete-packages should be run on debian/tests/control too. (package to test: mpich 4.2.1-4) Andreas