--- a/tests/test-rhg.t	Thu Aug 13 16:36:42 2020 +0200
+++ b/tests/test-rhg.t	Mon Aug 17 16:55:43 2020 +0200
@@ -12,6 +12,12 @@
 
 Unimplemented command
   $ rhg unimplemented-command
+  error: Found argument 'unimplemented-command' which wasn't expected, or isn't valid in this context
+  
+  USAGE:
+      rhg <SUBCOMMAND>
+  
+  For more information try --help
   [252]
 
 Finding root