--- a/tests/test-doctest.py	Fri Dec 18 14:40:11 2015 -0600
+++ b/tests/test-doctest.py	Fri Dec 11 11:23:49 2015 -0500
@@ -11,6 +11,7 @@
         mod = getattr(mod, testtarget)
     doctest.testmod(mod, optionflags=optionflags)
 
+testmod('mercurial.changegroup')
 testmod('mercurial.changelog')
 testmod('mercurial.dagparser', optionflags=doctest.NORMALIZE_WHITESPACE)
 testmod('mercurial.dispatch')