diff -r 5f04daa34a55 Lib/test/test_urllib.py
--- a/Lib/test/test_urllib.py	Tue Apr 14 09:59:09 2015 -0400
+++ b/Lib/test/test_urllib.py	Tue Apr 14 14:33:51 2015 -0400
@@ -296,6 +296,23 @@
         finally:
             self.unfakehttp()
 
+    def test_maxtries_limit_per_request(self):
+        # Ticket #12923: make sure independent requests each use their
+        # own retry limit.
+        for i in range(_urlopener.maxtries):
+            self.fakehttp(b'''HTTP/1.1 302 Found
+Date: Wed, 02 Jan 2008 03:03:54 GMT
+Server: Apache/1.3.33 (Debian GNU/Linux) mod_ssl/2.8.22 OpenSSL/0.9.7e
+Location: file://guidocomputer.athome.com:/python/license
+Connection: close
+Content-Type: text/html; charset=iso-8859-1
+''')
+            try:
+                self.assertRaises(urllib.error.HTTPError, urlopen,
+                    "http://something")
+            finally:
+                self.unfakehttp()
+
     def test_empty_socket(self):
         # urlopen() raises OSError if the underlying socket does not send any
         # data. (#1680230)