redis connection errors with Heroku build

[ra-dft]

I just deployed your Heroku build which was quick and easy(big Thumbsup), however my tests are failing and I'm seeing this repeatedly in the logs:
2016-01-13T03:56:39.597179+00:00 app[worker.1]: [2016-01-13 03:56:39,596: INFO/MainProcess] mingle: all alone
2016-01-13T03:56:39.693661+00:00 app[worker.1]: [2016-01-13 03:56:39,693: INFO/MainProcess] mingle: searching for neighbors
2016-01-13T03:56:39.628728+00:00 app[worker.1]: [2016-01-13 03:56:39,627: WARNING/MainProcess] consumer: Connection to broker lost. Trying to re-establish the connection...
2016-01-13T03:56:39.628730+00:00 app[worker.1]: Traceback (most recent call last):
2016-01-13T03:56:39.628731+00:00 app[worker.1]: File "/app/.heroku/python/lib/python3.4/site-packages/redis/connection.py", line 577, in read_response
2016-01-13T03:56:39.628732+00:00 app[worker.1]: response = self._parser.read_response()
2016-01-13T03:56:39.628732+00:00 app[worker.1]: File "/app/.heroku/python/lib/python3.4/site-packages/redis/connection.py", line 255, in read_response
2016-01-13T03:56:39.628733+00:00 app[worker.1]: raise error
2016-01-13T03:56:39.628734+00:00 app[worker.1]: 2016-01-13T03:56:39.628734+00:00 app[worker.1]:
2016-01-13T03:56:39.628735+00:00 app[worker.1]: During handling of the above exception, another exception occurred:
2016-01-13T03:56:39.628735+00:00 app[worker.1]: 2016-01-13T03:56:39.628735+00:00 app[worker.1]:

Is it pebcak or is there a real problem?