diff --git a/Lib/test/test_type_params.py b/Lib/test/test_type_params.py
index 96bd1fa0bab990..466e3bd43a68e5 100644
--- a/Lib/test/test_type_params.py
+++ b/Lib/test/test_type_params.py
@@ -843,5 +843,5 @@ def func[A]():
             func.__type_params__ = ()
         """
 
-        with self.assertRaisesRegex(AttributeError, "attribute '__type_params__' of 'function' objects is not writable"):
-            run_code(code)
+        ns = run_code(code)
+        self.assertEqual(ns["func"].__type_params__, ())