fix local import

do_tests.py

@@ -13,7 +13,7 @@
 from six.moves import configparser as configparser
 from psycopg2 import connect, OperationalError  # apt python-psycopg2
 
-from . import docker_dev_start
+import docker_dev_start
 
 if docker.__version__ > '2.5.0':
     from docker import APIClient as docker_api