diff --git a/ui/fixtures/cmd.mapping.json b/ui/fixtures/cmd.mapping.json
index 3379275..595a6dd 100644
--- a/ui/fixtures/cmd.mapping.json
+++ b/ui/fixtures/cmd.mapping.json
@@ -80,6 +80,7 @@
 },
 {
 	"special": "delete files",
+	"comment": "remove the other host's file, to verify it works",
 	"format": [ "files" ],
 	"files": [ "{mappatha}/text.txt" ]
 },