From bbfe6c3986dc61eecd592fb3a290fce6c089c4e7 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sun, 20 Nov 2016 20:04:54 +0200
Subject: [PATCH] Issue #28666: Fix removing readonly directories on Windows.

---
 Lib/test/support/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index f4d80b4998c..97828afa5a3 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -363,7 +363,7 @@ if sys.platform.startswith("win"):
                 else:
                     _force_run(path, os.unlink, fullname)
         _waitfor(_rmtree_inner, path, waitall=True)
-        _waitfor(os.rmdir, path)
+        _waitfor(lambda p: _force_run(p, os.rmdir, p), path)
 else:
     _unlink = os.unlink
     _rmdir = os.rmdir