diff --git a/Misc/NEWS b/Misc/NEWS
index 662bd69..427b9b6 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 
 Library
 
+- doctest now excludes functions and classes not defined by the module
+  being tested, thanks to Tim Hochberg.
+
 - quopri's encode and decode methods take an optional header parameter,
   which indicates whether output is intended for the header 'Q' encoding.