I uninstalled and reinstalled lago, which made the lago group disappear and reapper - and my user was not part of it. Then running the tests failed, as I could not write the lock file to /var/lib/lago/... Added a bit of code to the exception to see why: File "/usr/lib/python2.7/site-packages/lockfile/linklockfile.py", line 20, in acquire raise LockFailed("Failed to create %s.\nCode: %d\nReason: %s\n" % (self.unique_name, e.errno, e.strerror)) LockFailed: Failed to create /var/lib/lago/store/ykaul-mini.tlv.redhat.com-fa517700.1377-7176078113883238881. Code: 13 Reason: Permission denied And indeed, it was because I was not part of the lago group. Adding, logging out and in again solved it - but shouldn't there be such warning ? (I remember there was in the past). TIA, Y.