diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index e0e5406..db440d4 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -1352,6 +1352,27 @@ def sys_hook(exc_type, exc_value, exc_traceback):
                          'Exception in threading.excepthook:\n')
         self.assertEqual(err_str, 'threading_hook failed')
 
+    def test_original_excepthook(self):
+        def run_thread():
+            with support.captured_output("stderr") as output:
+                thread = ThreadRunFail(name="excepthook thread")
+                thread.start()
+                thread.join()
+            return output.getvalue()
+
+        def threading_hook(args):
+            print("Running a thread failed", file=sys.stderr)
+
+        default_output = run_thread()
+        with support.swap_attr(threading, 'excepthook', threading_hook):
+            custom_hook_output = run_thread()
+            threading.excepthook = threading.__excepthook__
+            recovered_output = run_thread()
+
+        self.assertEqual(default_output, recovered_output)
+        self.assertNotEqual(default_output, custom_hook_output)
+        self.assertEqual(custom_hook_output, "Running a thread failed\n")
+
 
 class TimerTests(BaseTestCase):
 
diff --git a/Lib/threading.py b/Lib/threading.py
index d4fe649..7dae77d 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -1200,6 +1200,10 @@ def excepthook(args, /):
         stderr.flush()
 
 
+# Original value of threading.excepthook
+__excepthook__ = excepthook
+
+
 def _make_invoke_excepthook():
     # Create a local namespace to ensure that variables remain alive
     # when _invoke_excepthook() is called, even if it is called late during