Mark failing test

ShaharNaveh · ShaharNaveh · commit 8de3eac1ecf1 · 2025-06-30T17:18:40.000+03:00
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
@@ -6747,6 +6747,8 @@ def test_ambiguous_option(self):
                 "ambiguous option: --foob=1 could match --foobaz, --fooble$",
             self.parser.parse_args, ['--foob=1', '--foogle', '2'])
 
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
     def test_os_error(self):
         self.parser.add_argument('file')
         self.assertRaisesRegex(argparse.ArgumentError,
