Fixed a test for issue #21619 on Windows.
On Windows an OSError with errno=EINVAL is raised.
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index caa36cf..fc98da5 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -2531,7 +2531,7 @@
         proc.stdout.read()  # Make sure subprocess has closed its input
         proc.stdin.write(b"buffered data")
         self.assertIsNone(proc.returncode)
-        self.assertRaises(BrokenPipeError, proc.__exit__, None, None, None)
+        self.assertRaises(OSError, proc.__exit__, None, None, None)
         self.assertEqual(0, proc.returncode)
         self.assertTrue(proc.stdin.closed)
         self.assertTrue(proc.stdout.closed)