--- a/tests/test-alias.t	Wed Feb 15 17:30:21 2012 -0500
+++ b/tests/test-alias.t	Tue Mar 27 16:13:59 2012 -0500
@@ -134,6 +134,12 @@
 
 positional arguments
 
+  $ hg positional
+  abort: too few arguments for command alias
+  [255]
+  $ hg positional a
+  abort: too few arguments for command alias
+  [255]
   $ hg positional 'node|short' rev
   0 e63c23eaa88a | 1970-01-01 00:00 +0000