Index: Lib/test/test_urlparse.py
===================================================================
--- Lib/test/test_urlparse.py	(revisión: 64443)
+++ Lib/test/test_urlparse.py	(copia de trabajo)
@@ -321,6 +321,11 @@
         self.assertEqual(urlparse.urlparse("http://example.com?blahblah=/foo"),
                          ('http', 'example.com', '', '', 'blahblah=/foo', ''))
 
+    def test_no_scheme(self):
+        # Issue 754016: urlparse('1.2.3.4:80','http') is legal
+        self.assertEqual(urlparse.urlparse('1.2.3.4:80','http'),
+                         ('http', '1.2.3.4:80', '', '', '', ''))
+
 def test_main():
     test_support.run_unittest(UrlParseTestCase)