autopkgtest: test_signatures (friends.tests.test_twitter.TestTwitter) failed

The following test is failing autopkgtest:

python3 -m unittest discover

(process:23531): libnotify-WARNING **: Failed to connect to proxy
/usr/lib/python3.3/importlib/_bootstrap.py:313: UserWarning: Module friends was already imported from /tmp/tmp.7zFMNkYn1G/dsc0-build/friends-0.2.0+13.10.20130822/friends/__init__.py, but /usr/lib/python3/dist-packages is being added to sys.path
  return f(*args, **kwds)
..........................................................F............................................................................................................................................................................................
======================================================================
FAIL: test_signatures (friends.tests.test_twitter.TestTwitter)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.3/unittest/mock.py", line 1087, in patched
    return func(*args, **keywargs)
  File "/tmp/tmp.7zFMNkYn1G/dsc0-build/friends-0.2.0+13.10.20130822/friends/tests/test_twitter.py", line 120, in test_signatures
    method='GET')
  File "/usr/lib/python3.3/unittest/mock.py", line 737, in assert_called_once_with
    return self.assert_called_with(*args, **kwargs)
  File "/usr/lib/python3.3/unittest/mock.py", line 726, in assert_called_with
    raise AssertionError(msg)
AssertionError: Expected call: Downloader('http://example.com', params=None, headers={'Authorization': 'OAuth oauth_nonce="once%20upon%20a%20nonce", oauth_timestamp="1348690628", oauth_version="1.0", oauth_signature_method="HMAC-SHA1", oauth_consumer_key="consume", oauth_token="omega", oauth_signature="2MlC4DOqcAdCUmU647izPmxiL%2F0%3D"'}, method='GET', rate_limiter='limits')
Actual call: Downloader('http://example.com', params=None, headers={'Authorization': 'OAuth oauth_nonce="once%20upon%20a%20nonce", oauth_timestamp="1348690628", oauth_version="1.0", oauth_signature_method="HMAC-SHA1", oauth_consumer_key="consume", oauth_token="omega", oauth_signature="klnMTp3hH%2Fl3b5%2BmPtBlv%2BCulic%3D"'}, method='GET', rate_limiter='limits')

----------------------------------------------------------------------
Ran 247 tests in 1.857s

FAILED (failures=1)
make: *** [check] Error 1

http://jenkins.qa.ubuntu.com/job/saucy-adt-friends/ARCH=amd64,label=adt/99/

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: friends 0.2.0+13.10.20130822-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-6.12-generic 3.11.0
Uname: Linux 3.11.0-6-generic x86_64
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Tue Sep 10 12:09:47 2013
InstallationDate: Installed on 2013-09-03 (6 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
MarkForUpload: True
SourcePackage: friends
UpgradeStatus: No upgrade log present (probably fresh install)