diff --git a/ckan/tests/lib/test_munge.py b/ckan/tests/lib/test_munge.py
index df34954c5cc..d282a6e1031 100644
--- a/ckan/tests/lib/test_munge.py
+++ b/ckan/tests/lib/test_munge.py
@@ -50,7 +50,7 @@ class TestMungeFilename(object):
         ('2014-11-10 12:24:05.340603my_image.jpeg',
          '2014-11-10-122405.340603my_image.jpeg'),
         ('file.csv', 'file.csv'),
-        ('underscores_are_awesome','underscores_are_awesome'),
+        ('underscores_are_awesome', 'underscores_are_awesome'),
         ('f' * 100 + '.csv', 'f' * 96 + '.csv'),
         ('path/to/file.csv', 'file.csv'),
         ('.longextension', '.longextension'),