tox/unit test: Dont print output that looks like an error, when that is in fact expected
tox/unit test: Dont print output that looks like an error, when that is in fact expected

locustio/locust,mbeacom/locust,locustio/locust,mbeacom/locust,mbeacom/locust,mbeacom/locust,locustio/locust,locustio/locust