diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index 8a4fdb9..b615722 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -235,8 +235,8 @@
                 parser = self._get_parser(tester)
                 for args_str in tester.failures:
                     args = args_str.split()
-                    raises = tester.assertRaises
-                    raises(ArgumentParserError, parser.parse_args, args)
+                    with tester.assertRaises(ArgumentParserError, msg=args):
+                        parser.parse_args(args)
 
             def test_successes(self, tester):
                 parser = self._get_parser(tester)