======================================================================
FAIL: nova.tests.unit.virt.libvirt.test_driver.LibvirtConnTestCase.test_create_image_with_ephemerals
nova.tests.unit.virt.libvirt.test_driver.LibvirtConnTestCase.test_create_image_with_ephemerals
----------------------------------------------------------------------
_StringException: Empty attachments:
  stderr
  stdout

pythonlogging:'': {{{
2016-10-31 21:21:25,222 WARNING [nova.virt.libvirt.firewall] Libvirt module could not be loaded. NWFilterFirewall will not work correctly.
2016-10-31 21:21:25,224 INFO [os_brick.initiator.connector] Init DISCO connector
}}}

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/build/nova-13.1.1/nova/tests/unit/virt/libvirt/test_driver.py", line 9645, in test_create_image_with_ephemerals
    backend = self.useFixture(fake_imagebackend.ImageBackendFixture())
AttributeError: 'module' object has no attribute 'ImageBackendFixture'


----------------------------------------------------------------------
Ran 16586 tests in 3321.084s

FAILED (failures=1, skipped=98)
debian/rules:57: recipe for target 'override_dh_auto_test' failed
make[1]: *** [override_dh_auto_test] Error 1
make[1]: Leaving directory '/build/nova-13.1.1'
debian/rules:17: recipe for target 'build' failed
make: *** [build] Error 2