diff --git i/slugify/tests.py w/slugify/tests.py
index 4c9fa1c..3e14328 100644
--- i/slugify/tests.py
+++ w/slugify/tests.py
@@ -57,7 +57,7 @@ class PredefinedSlugifyTestCase(unittest.TestCase):
         self.assertEqual(slugify_url('The Über article'), 'uber-article')
 
     def test_slugify_filename(self):
-        self.assertEqual(slugify_filename(u'Дrаft №2.txt'), u'Draft_2.txt')
+        self.assertEqual(slugify_filename(u'Дrаft №2.txt'), u'Draft_No._2.txt')
 
 
 class ToLowerTestCase(unittest.TestCase):