bpo-46482: add a test for `typing.Annotation.__new__` (GH-30821)

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 8449affd03a768acc642ceedeab0756d2c526dde..090d4c70d3d8492a72047cfb07f237de4537e185 100644 (file)
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -4643,6 +4643,13 @@ class RETests(BaseTestCase):
 
 class AnnotatedTests(BaseTestCase):
 
+    def test_new(self):
+        with self.assertRaisesRegex(
+            TypeError,
+            'Type Annotated cannot be instantiated',
+        ):
+            Annotated()
+
     def test_repr(self):
         self.assertEqual(
             repr(Annotated[int, 4, 5]),