--- a/tests/test-alias.t	Thu Dec 01 20:42:24 2011 +0100
+++ b/tests/test-alias.t	Thu Dec 01 15:51:36 2011 -0600
@@ -395,3 +395,11 @@
   use "hg help" for the full list of commands or "hg -v" for details
   [255]
 
+This should show id:
+
+  $ hg --config alias.log='id' log
+  000000000000 tip
+
+This shouldn't:
+
+  $ hg --config alias.log='id' history