From c217a4b71a847326ce4e6e47f1d52fe45ad005fb Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Tue, 15 Mar 2011 15:18:47 -0500
Subject: [PATCH] should use 'is' here

---
 Lib/test/test_dis.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index c3b2a4fc72b..7cda0dced9a 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -276,7 +276,7 @@ class DisTests(unittest.TestCase):
         old = getattr(sys, 'last_traceback', not_defined)
 
         def cleanup():
-            if old != not_defined:
+            if old is not not_defined:
                 sys.last_traceback = old
             else:
                 del sys.last_traceback