Make the type consistent for hashlib algorithm constants.  (Reviewed by Benjamin).
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 1f5a8be..fe316fd 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -103,7 +103,7 @@
 
     def test_algorithms_guaranteed(self):
         self.assertEqual(hashlib.algorithms_guaranteed,
-            tuple(_algo for _algo in self.supported_hash_names
+            set(_algo for _algo in self.supported_hash_names
                   if _algo.islower()))
 
     def test_algorithms_available(self):