--- a/tests/test-dispatch.t	Sun Jan 06 04:04:44 2013 +0100
+++ b/tests/test-dispatch.t	Mon Jan 07 02:00:29 2013 +0100
@@ -46,6 +46,12 @@
 
   $ cd "$TESTTMP"
 
+OSError ... and with filename even when it is empty
+
+  $ hg -R a archive ''
+  abort: No such file or directory: ''
+  [255]
+
 #if no-outer-repo
 
 No repo: