Traceback (most recent call last):

 "/virtualenv/local/lib/python2.7/site-packages/billiard/pool.py", line 286, in worker
put((READY, (job, i, result)))

 "/virtualenv/local/lib/python2.7/site-packages/billiard/queues.py", line 377, in put
return send(obj)MaybeEncodingError: Error sending result: '"<ExceptionInfo: ObjectDoesNotExist('TestClass matching query does not exist.',)>"'. Reason: ''PicklingError("Can\'t pickle <class \'models.DoesNotExist\'>: attribute lookup models.DoesNotExist failed",)''.
Traceback (most recent call last):


 "/usr/lib/python2.7/site-packages/nose/case.py", line 197, in runTest

self.test(*self.arg)
TypeError: test_memmap_persistence_mixed_dtypes() takes exactly 1 argument (0 given)
