463,471d462
<     def test_issue_18191(self):
<         self.assertEqual(urllib_parse_splitport('server01'),    ('server01', None)) 
<         self.assertEqual(urllib_parse_splitport('server01:80'), ('server01', '80')) 
<         self.assertEqual(urllib_parse_splitport('1.1.1.1'),     ('1.1.1.1', None)) 
<         self.assertEqual(urllib_parse_splitport('1.1.1.1:80'),  ('1.1.1.1', '80')) 
<         self.assertEqual(urllib_parse_splitport('::1'),         ('::1', None)) 
<         self.assertEqual(urllib_parse_splitport('::1:80'),      ('::1:80', None)) 
<         self.assertEqual(urllib_parse_splitport('[::1]'),       ('::1', None)) 
<         self.assertEqual(urllib_parse_splitport('[::1]:80'),    ('::1', '80'))