Fix typo.
diff --git a/Lib/test/test_unicodedata.py b/Lib/test/test_unicodedata.py
index 1651b46..baa36cb 100644
--- a/Lib/test/test_unicodedata.py
+++ b/Lib/test/test_unicodedata.py
@@ -270,7 +270,7 @@
             [0]
         )
 
-    def test_buf_4971(self):
+    def test_bug_4971(self):
         # LETTER DZ WITH CARON: DZ, Dz, dz
         self.assertEqual(u"\u01c4".title(), u"\u01c5")
         self.assertEqual(u"\u01c5".title(), u"\u01c5")