diff --git a/python/helpers/pycharm/django_test_runner.py b/python/helpers/pycharm/django_test_runner.py
index c25f827372ff..6e1d94cf4ea2 100644
--- a/python/helpers/pycharm/django_test_runner.py
+++ b/python/helpers/pycharm/django_test_runner.py
@@ -35,6 +35,7 @@ try:
       BaseSuiteRunner.__init__(self)
 
 except ImportError:
+  # for Django <= 1.1 compatibility
   class BaseRunner(TeamcityTestRunner):
     def __init__(self, stream=sys.stdout, **options):
       TeamcityTestRunner.__init__(self, stream)
diff --git a/python/helpers/pycharm/tcunittest.py b/python/helpers/pycharm/tcunittest.py
index 8e8a5c496116..c2b5ecdc3bcb 100644
--- a/python/helpers/pycharm/tcunittest.py
+++ b/python/helpers/pycharm/tcunittest.py
@@ -184,7 +184,7 @@ class TeamcityTestResult(TestResult):
     # do not use text.decode('string_escape'), it leads to problems with different string encodings given
     return text.replace("\\n", "\n")
 
-class TeamcityTestRunner:
+class TeamcityTestRunner(object):
   def __init__(self, stream=sys.stdout):
     self.stream = stream