Index: Lib/test/test_mutants.py
===================================================================
--- Lib/test/test_mutants.py	(revision 62635)
+++ Lib/test/test_mutants.py	(working copy)
@@ -128,8 +128,8 @@
 
     # Fill the dicts without mutating them.
     mutate = 0
-    dict1keys = fill_dict(dict1, range(n), n)
-    dict2keys = fill_dict(dict2, range(n), n)
+    dict1keys = fill_dict(dict1, list(range(n)), n)
+    dict2keys = fill_dict(dict2, list(range(n)), n)
 
     # Enable mutation, then compare the dicts so long as they have the
     # same size.