python
diff --git a/Collapse file
‎Lib/test/test_typing.py‎
Copy file name to clipboardExpand all lines: Lib/test/test_typing.py
+4-2Lines changed: 4 additions & 2 deletions b/Collapse file
‎Lib/test/test_typing.py‎
Copy file name to clipboardExpand all lines: Lib/test/test_typing.py
+4-2Lines changed: 4 additions & 2 deletions
@@ -225,8 +225,10 @@ def test_no_redefinition(self):
         self.assertNotEqual(TypeVar('T', int, str), TypeVar('T', int, str))
 
     def test_cannot_subclass_vars(self):
-        with self.assertRaises(TypeError):
-            class V(TypeVar('T')):
+        with self.assertRaisesRegex(
+            TypeError, r"Cannot subclass an instance of TypeVar\."
+        ):
+            class V(TypeVar("T")):
                 pass
 
     def test_cannot_subclass_var_itself(self):