diff -r 4e2cce65e522 Lib/test/test_urllib2_localnet.py
--- a/Lib/test/test_urllib2_localnet.py	Thu Oct 13 11:25:17 2016 -0700
+++ b/Lib/test/test_urllib2_localnet.py	Thu Oct 13 22:06:39 2016 +0200
@@ -323,6 +323,14 @@
 
     def setUp(self):
         super(ProxyAuthTests, self).setUp()
+        # Ignore proxies for localhost tests.
+        def restore_environ(old_environ):
+            os.environ.clear()
+            os.environ.update(old_environ)
+        self.addCleanup(restore_environ, os.environ.copy())
+        os.environ['NO_PROXY'] = ''
+        os.environ['no_proxy'] = ''
+
         self.digest_auth_handler = DigestAuthHandler()
         self.digest_auth_handler.set_users({self.USER: self.PASSWD})
         self.digest_auth_handler.set_realm(self.REALM)
@@ -358,6 +366,7 @@
                           self.URL)
 
     def test_proxy_qop_auth_works(self):
+
         self.proxy_digest_handler.add_password(self.REALM, self.URL,
                                                self.USER, self.PASSWD)
         self.digest_auth_handler.set_qop("auth")
@@ -445,6 +454,7 @@
             os.environ.update(old_environ)
         self.addCleanup(restore_environ, os.environ.copy())
         os.environ['NO_PROXY'] = '*'
+        os.environ['no_proxy'] = '*'
 
     def urlopen(self, url, data=None, **kwargs):
         l = []