1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 489836c..b3a6717 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -221,6 +221,13 @@ class TypeVarTests(BaseTestCase):
         with self.assertRaises(TypeError):
             TypeVar('X', str, float, bound=Employee)
 
+    def test_missing__name__(self):
+        # See bpo-39942
+        code = ("import typing\n"
+                "T = typing.TypeVar('T')\n"
+                )
+        exec(code, {})
+
     def test_no_bivariant(self):
         with self.assertRaises(ValueError):
             TypeVar('T', covariant=True, contravariant=True)