--- a/tests/test-rhg.t	Thu Jun 24 14:23:11 2021 +0530
+++ b/tests/test-rhg.t	Tue Oct 05 16:09:20 2021 +0100
@@ -121,6 +121,8 @@
   file-3
   $ $NO_FALLBACK rhg cat -r cf8b83 file-2
   2
+  $ $NO_FALLBACK rhg cat --rev cf8b83 file-2
+  2
   $ $NO_FALLBACK rhg cat -r c file-2
   abort: ambiguous revision identifier: c
   [255]