Actually, we do unset DBUS_SYSTEM_BUS_ADDRESS via TEST_DBUS(). -- https://code.launchpad.net/~jamesodhunt/upstart/cleanup-test-xdg-dirs/+merge/194848 Your team Upstart Reviewers is requested to review the proposed merge of lp:~jamesodhunt/upstart/cleanup-test-xdg-dirs into lp:upstart.