diff -r 3d9e35137641 Lib/ctypes/test/test_values.py
--- a/Lib/ctypes/test/test_values.py	Fri Jun 20 23:00:22 2014 +0100
+++ b/Lib/ctypes/test/test_values.py	Mon Jun 23 15:20:51 2014 +0300
@@ -4,6 +4,7 @@
 
 import unittest
 import sys
+from textwrap import dedent
 from ctypes import *
 
 import _ctypes_test
@@ -43,10 +44,18 @@
         opt = c_int.in_dll(pythonapi, "Py_OptimizeFlag").value
         if __debug__:
             self.assertEqual(opt, 0)
-        elif ValuesTestCase.__doc__ is not None:
-            self.assertEqual(opt, 1)
         else:
-            self.assertEqual(opt, 2)
+            locals_, globals_ = {}, {}
+            exec(dedent("""
+            class A:
+                ''' docstring '''
+            """), globals_, locals_)
+            docstring = locals_['A'].__doc__
+            if docstring:
+                self.assertEqual(opt, 1)
+            else:
+                self.assertEqual(opt, 2)
+
 
     def test_frozentable(self):
         # Python exports a PyImport_FrozenModules symbol. This is a