Comment 5 for bug 1603706

For the record, I've found the cause of the issue I wrote about in comment 4: the Accounts::Manager object was not being deleted at the end of the test. Given that the D-Bus connection was being torn down, there probably was some GLib event about that left in the mainloop, which was processed only when the next startServices() was called. Deleting the Accounts::Manager fixed the problem.