From 5ab1e8693ffa34cf613b726feb2b7dd2271a86c7 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Tue, 26 May 2026 00:09:41 +0200
Subject: [PATCH] gh-149879: Fix test_ftplib on Cygwin (#150431)

Skip test_abort() since MSG_OOB doesn't work properly on Cygwin. The
server gets b'\n' and then b'ABOR\r', instead of getting b'ABOR\r\n'.
---
 Lib/test/test_ftplib.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Lib/test/test_ftplib.py b/Lib/test/test_ftplib.py
index f1eff9430f7..983a8b92cf6 100644
--- a/Lib/test/test_ftplib.py
+++ b/Lib/test/test_ftplib.py
@@ -8,6 +8,7 @@
 import io
 import errno
 import os
+import sys
 import threading
 import time
 import unittest
@@ -590,6 +591,8 @@ def test_quit(self):
         # Ensure the connection gets closed; sock attribute should be None
         self.assertEqual(self.client.sock, None)
 
+    @unittest.skipIf(sys.platform == 'cygwin',
+                     "MSG_OOB doesn't work properly on Cygwin")
     def test_abort(self):
         self.client.abort()