1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
index 5c1a3f3c6d2..9901a3c2d4e 100644
--- a/Lib/test/test_marshal.py
+++ b/Lib/test/test_marshal.py
@@ -170,6 +170,18 @@ class ContainerTestCase(unittest.TestCase):
         self.assertEqual(t, new)
         os.unlink(test_support.TESTFN)
 
+    def test_sets(self):
+        for constructor in (set, frozenset):
+            t = constructor(self.d.keys())
+            new = marshal.loads(marshal.dumps(t))
+            self.assertEqual(t, new)
+            self.assert_(isinstance(new, constructor))
+            self.assertNotEqual(id(t), id(new))
+            marshal.dump(t, file(test_support.TESTFN, "wb"))
+            marshal.load(file(test_support.TESTFN, "rb"))
+            self.assertEqual(t, new)
+            os.unlink(test_support.TESTFN)
+
 class BugsTestCase(unittest.TestCase):
     def test_bug_5888452(self):
         # Simple-minded check for SF 588452: Debug build crashes