The apache2 charm fails automated testing

According to the latest test results by charm http://reports.vapour.ws/charm-tests-by-charm this charm is failing automated testing.

http://reports.vapour.ws/charm-tests/charm-bundle-test-1329-results

Here is the failure from the log file:

writing new private key to '/tmp/tmppZqeVk/key'
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FGenerating a 1024 bit RSA private key
.......++++++
........................++++++
writing new private key to '/tmp/tmpshf1iO/key'
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F........................
======================================================================
FAIL: tests.test_cert.CertTests.test_is_selfsigned_cert_stale_private_address_changed
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_StringException: Traceback (most recent call last):
  File "/var/lib/jenkins/workspace/charm-bundle-test/tmpyLaMy_/apache2/.venv/local/lib/python2.7/site-packages/mock.py", line 1201, in patched
    return func(*args, **keywargs)
  File "/var/lib/jenkins/workspace/charm-bundle-test/tmpyLaMy_/apache2/hooks/tests/test_cert.py", line 95, in test_is_selfsigned_cert_stale_private_address_changed
    hooks.is_selfsigned_cert_stale(config, cert_file, key_file))
  File "/usr/lib/python2.7/unittest/case.py", line 424, in assertTrue
    raise self.failureException(msg)
AssertionError: False is not true