diff --git a/Lib/test/test_normalization.py b/Lib/test/test_normalization.py
index b571bdc8064..99f8e4efb6f 100644
--- a/Lib/test/test_normalization.py
+++ b/Lib/test/test_normalization.py
@@ -6,7 +6,7 @@ import os
 from unicodedata import normalize
 
 TESTDATAFILE = "NormalizationTest" + os.extsep + "txt"
-TESTDATAURL = "http://www.unicode.org/Public/4.1.0/ucd/" + TESTDATAFILE
+TESTDATAURL = "http://www.unicode.org/Public/5.1.0/ucd/" + TESTDATAFILE
 
 class RangeError(Exception):
     pass