diff --git a/src/tests/settings.py b/src/tests/settings.py
index 7aee6e4bb..43cc06c4e 100644
--- a/src/tests/settings.py
+++ b/src/tests/settings.py
@@ -4,9 +4,7 @@ TEST_DIR = os.path.dirname(__file__)
 
 TEMPLATES[0]['DIRS'].append(os.path.join(TEST_DIR, 'templates'))
 
-INSTALLED_APPS = INSTALLED_APPS + (
-    'tests.testdummy',
-)
+INSTALLED_APPS.append('tests.testdummy')
 
 MEDIA_ROOT = os.path.join(TEST_DIR, 'media')