diff --git a/common/djangoapps/track/backends/__init__.py b/common/djangoapps/track/backends/__init__.py
index 346d91b73b..d7b04f646f 100644
--- a/common/djangoapps/track/backends/__init__.py
+++ b/common/djangoapps/track/backends/__init__.py
@@ -10,13 +10,14 @@ from __future__ import absolute_import
 
 import abc
 
+import six
 
-class BaseBackend(object):
+
+class BaseBackend(six.with_metaclass(abc.ABCMeta, object)):
     """
     Abstract Base Class for event tracking backends.
 
     """
-    __metaclass__ = abc.ABCMeta
 
     def __init__(self, **kwargs):
         pass
diff --git a/common/djangoapps/track/backends/tests/test_logger.py b/common/djangoapps/track/backends/tests/test_logger.py
index 9c98629ed9..aa7e908541 100644
--- a/common/djangoapps/track/backends/tests/test_logger.py
+++ b/common/djangoapps/track/backends/tests/test_logger.py
@@ -2,9 +2,9 @@
 """Tests for Event tracker backend."""
 from __future__ import absolute_import
 
+import datetime
 import json
 import logging
-import datetime
 
 from track.backends.logger import LoggerBackend
 
diff --git a/common/djangoapps/track/backends/tests/test_mongodb.py b/common/djangoapps/track/backends/tests/test_mongodb.py
index 44db6fcd83..c7e8297bb5 100644
--- a/common/djangoapps/track/backends/tests/test_mongodb.py
+++ b/common/djangoapps/track/backends/tests/test_mongodb.py
@@ -1,8 +1,7 @@
 from __future__ import absolute_import
 
-from mock import patch
-
 from django.test import TestCase
+from mock import patch
 
 from track.backends.mongodb import MongoBackend