fix syntax
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index ad9230c..887b512 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -484,8 +484,8 @@
             self.assertRaises(ValueError, self.loads, buf)
 
     def test_unicode(self):
-        endcases = [u'', u'<\\u>', u'<\\\u1234>', u'<\n>',
-                    u'<\\>', u'<\\\U00012345>']
+        endcases = ['', '<\\u>', '<\\\u1234>', '<\n>',
+                    '<\\>', '<\\\U00012345>']
         for proto in protocols:
             for u in endcases:
                 p = self.dumps(u, proto)