--- a/tests/test-treemanifest.t	Tue Jan 12 21:01:06 2016 -0800
+++ b/tests/test-treemanifest.t	Tue Jan 12 21:23:45 2016 -0800
@@ -400,6 +400,7 @@
   $ cd ..
 We can clone even with the knob turned off and we'll get a treemanifest repo.
   $ hg clone --config experimental.treemanifest=False \
+  >   --config experimental.changegroup3=True \
   >   http://localhost:$HGPORT deepclone
   requesting all changes
   adding changesets