diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index e617fa1..1a02ef2 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -636,6 +636,7 @@
         self.assertScriptHasOutput(script, output)
 
     @unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
+    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
     def test_reinit_tls_after_fork(self):
         # Issue #13817: fork() would deadlock in a multithreaded program with
         # the ad-hoc TLS implementation.