diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 62762418b3f4a8..2842e28c5ab598 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2650,6 +2650,10 @@ def test_forwardref_subclass_type_error(self):
         with self.assertRaises(TypeError):
             issubclass(int, fr)
 
+    def test_forwardref_only_str_arg(self):
+        with self.assertRaises(TypeError):
+            typing.ForwardRef(1)  # only `str` type is allowed
+
     def test_forward_equality(self):
         fr = typing.ForwardRef('int')
         self.assertEqual(fr, typing.ForwardRef('int'))