1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 3a85c767a8..514b75c0d6 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -1,5 +1,6 @@
 import unittest
 from test import test_support
+from weakref import proxy
 import operator
 import copy
 import pickle
@@ -346,6 +347,13 @@ class TestSet(TestJointOps):
             else:
                 self.assert_(c not in self.s)
 
+    def test_weakref(self):
+        s = self.thetype('gallahad')
+        p = proxy(s)
+        self.assertEqual(str(p), str(s))
+        s = None
+        self.assertRaises(ReferenceError, str, p)
+
 class SetSubclass(set):
     pass