diff --git a/analytical/tests/test_utils.py b/analytical/tests/test_utils.py
index 3b5e6dd..83c4cf6 100644
--- a/analytical/tests/test_utils.py
+++ b/analytical/tests/test_utils.py
@@ -30,14 +30,14 @@ class SettingDeletedTestCase(TestCase):
         # available in python >= 3.2
         if hasattr(self, 'assertRaisesRegex'):
             with self.assertRaisesRegex(AnalyticalException, "^USER_ID setting is not set$"):
-                get_required_setting("USER_ID", "\d+", "invalid USER_ID")
+                get_required_setting("USER_ID", r"\d+", "invalid USER_ID")
         # available in python >= 2.7, deprecated in 3.2
         elif hasattr(self, 'assertRaisesRegexp'):
             with self.assertRaisesRegexp(AnalyticalException, "^USER_ID setting is not set$"):
-                get_required_setting("USER_ID", "\d+", "invalid USER_ID")
+                get_required_setting("USER_ID", r"\d+", "invalid USER_ID")
         else:
             self.assertRaises(AnalyticalException,
-                              get_required_setting, "USER_ID", "\d+", "invalid USER_ID")
+                              get_required_setting, "USER_ID", r"\d+", "invalid USER_ID")
 
 
 class MyUser(AbstractBaseUser):