Comment 2 for bug 963463

Also:

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ERROR: lp.services.sshserver.tests.test_auth.TestPublicKeyFromLaunchpadChecker.test_noKeys
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Traceback (most recent call last):
_StringException: Empty attachments:
  twisted-log

Traceback (most recent call last):
  File "/var/lib/buildbot/dependencies/eggs/testtools-0.9.14-py2.6.egg/testtools/deferredruntest.py", line 199, in _log_user_exception
    raise e
UncleanReactorError: The reactor still thinks it needs to do things. Close all connections, kill all processes and make sure all delayed calls have either fired or been cancelled:
  <DelayedCall 0xceafe8c [-106.44284296s] called=0 cancelled=1>