found 1016452 loggerhead/2.0.0-1 >From the changelog message of version 2.0.0-1 I do not know if the maintainer understood the problem here. This is an autopkgtest regression which is blocking the package migration to testing, not a FTBFS. This is not fixed in the latest version.
I took a look and I noticed the tests are not shipped in the package, I am not sure how "bzr selftest" works but I believe it needs to find the tests in some way. During build time all the tests pass because the test code is there but during autopkgtest time where just the binary package is installed (without the test code) it does not work. I hope this helps to clarify the issue. -- Lucas Kanashiro