diff --git a/tests/test-help.out b/tests/test-help.out
--- a/tests/test-help.out
+++ b/tests/test-help.out
@@ -163,7 +163,7 @@ options:
  -I --include  include names matching the given patterns
  -X --exclude  exclude names matching the given patterns
  -n --dry-run  do not perform actions, just print output
-hg diff [-a] [-I] [-X] [-r REV1 [-r REV2]] [FILE]...
+hg diff [OPTION]... [-r REV1 [-r REV2]] [FILE]...
 
 diff repository (or selected files)