diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index fd9c36150eb..d05574cb998 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -94,7 +94,6 @@ class urlopen_FileTests(unittest.TestCase):
         for line in self.returned_obj.__iter__():
             self.assertEqual(line, self.text)
 
-
 class ProxyTests(unittest.TestCase):
 
     def setUp(self):
@@ -592,6 +591,11 @@ class URLopener_Tests(unittest.TestCase):
         self.assertEqual(DummyURLopener().open(
             'spam://example/ /'),'//example/%20/')
 
+        # test the safe characters are not quoted by urlopen
+        self.assertEqual(DummyURLopener().open(
+            "spam://c:|windows%/:=&?~#+!$,;'@()*[]|/path/"),
+            "//c:|windows%/:=&?~#+!$,;'@()*[]|/path/")
+
 
 # Just commented them out.
 # Can't really tell why keep failing in windows and sparc.
diff --git a/Lib/urllib.py b/Lib/urllib.py
index 03f6f5a3232..2fdf927f0ad 100644
--- a/Lib/urllib.py
+++ b/Lib/urllib.py
@@ -177,7 +177,7 @@ class URLopener:
         fullurl = unwrap(toBytes(fullurl))
         # percent encode url. fixing lame server errors like space within url
         # parts
-        fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]")
+        fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]|")
         if self.tempcache and fullurl in self.tempcache:
             filename, headers = self.tempcache[fullurl]
             fp = open(filename, 'rb')