diff --git a/tests/unit/test_container.py b/tests/unit/test_container.py
index 4fb31c6d0..4fe4c678d 100644
--- a/tests/unit/test_container.py
+++ b/tests/unit/test_container.py
@@ -179,7 +179,7 @@ def test_set_parent_overwrite_proxy(self):
 
     def test_slash_restriction(self):
         self.assertRaises(ValueError, Container, 'bad/name')
-    
+
     def test_colon_restriction(self):
         self.assertRaises(ValueError, Container, 'bad:name')