diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index 9b0ae709d7968d..4595e7e5d3edc1 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -714,7 +714,10 @@ def call(part):
 
     def test_frame_locals_proxy_type(self):
         self.assertIsInstance(types.FrameLocalsProxyType, type)
-        self.assertIsInstance(types.FrameLocalsProxyType.__doc__, str)
+        if MISSING_C_DOCSTRINGS:
+            self.assertIsNone(types.FrameLocalsProxyType.__doc__)
+        else:
+            self.assertIsInstance(types.FrameLocalsProxyType.__doc__, str)
         self.assertEqual(types.FrameLocalsProxyType.__module__, 'builtins')
         self.assertEqual(types.FrameLocalsProxyType.__name__, 'FrameLocalsProxy')