Index: Lib/test/test_argparse.py
===================================================================
--- Lib/test/test_argparse.py	(revision 83538)
+++ Lib/test/test_argparse.py	(working copy)
@@ -1187,7 +1187,17 @@
         ('a -x b', NS(x=['b'], y=['a'])),
     ]
 
+class TestPositionalArgAfterNargsOneOrMore(ParserTestCase):
+    """Tests specifying a positional that follows an arg with nargs=+"""
 
+    argument_signatures = [Sig('-x', nargs='+'), Sig('y')]
+    failures = ['', '-x']
+    successes = [
+        ('-x foo bar', NS(x=['foo',], y='bar')),
+        ('-x foo bar baz', NS(x=['foo', 'bar'], y='baz')),
+        ('-x foo bar baz buzz', NS(x=['foo', 'bar', 'baz'], y='buzz')),
+    ]
+
 class TestNargsRemainder(ParserTestCase):
     """Tests specifying a positional with nargs=REMAINDER"""