From b3a88b5c421fe867e1f5ecdd179b190614729933 Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <solipsis@pitrou.net>
Date: Thu, 14 Oct 2010 18:31:39 +0000
Subject: Really fix bug

---
 Lib/test/test_urllib.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index fc3db9f..f0766b2 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -118,8 +118,8 @@ class ProxyTests(unittest.TestCase):
         # Records changes to env vars
         self.env = support.EnvironmentVarGuard()
         # Delete all proxy related env vars
-        for k in os.environ.keys():
-            if k == 'NO_PROXY':
+        for k in list(os.environ):
+            if 'proxy' not in k.lower():
                 self.env.unset(k)
 
     def tearDown(self):
-- 
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