Fix

nova/tests/test_localization.py

@@ -21,9 +21,9 @@ import sys
 import unittest
 
 import nova
+from nova import test
 
-
-class LocalizationTestCase(unittest.TestCase):
+class LocalizationTestCase(test.TestCase):
     def test_multiple_positional_format_placeholders(self):
         pat = re.compile("\W_\(")
         single_pat = re.compile("\W%\W")