diff --git a/Lib/test/test_cookie.py b/Lib/test/test_cookie.py
index 1fb9b7d..816133e 100644
--- a/Lib/test/test_cookie.py
+++ b/Lib/test/test_cookie.py
@@ -90,9 +90,10 @@
 
 def test_main():
     run_unittest(CookieTests)
-    with check_warnings(('.+Cookie class is insecure; do not use it',
-                         DeprecationWarning)):
-        run_doctest(Cookie)
+    if Cookie.__doc__ is not None:
+        with check_warnings(('.+Cookie class is insecure; do not use it',
+                             DeprecationWarning)):
+            run_doctest(Cookie)
 
 if __name__ == '__main__':
     test_main()