Fix  Issue6631 - Disallow relative file paths in urllib urlopen
diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index 5a6dd65..f6b48cb 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -160,6 +160,9 @@
         for line in self.returned_obj:
             self.assertEqual(line, self.text)
 
+    def test_relativelocalfile(self):
+        self.assertRaises(ValueError,urllib.request.urlopen,'./' + self.pathname)
+
 class ProxyTests(unittest.TestCase):
 
     def setUp(self):