--- a/tests/test-options.t	Thu Oct 18 22:11:43 2018 -0700
+++ b/tests/test-options.t	Thu Oct 18 21:59:24 2018 -0700
@@ -24,6 +24,7 @@
   >   allowunstable
   >   exchange
   > EOF
-  $ hg prune | head -n 2
+  $ hg prune
   hg: unknown command 'prune'
   (use 'hg help' for a list of commands)
+  [255]