diff --git a/vm/pimox-haos-vm.sh b/vm/pimox-haos-vm.sh
index cb3b8fd4..012208af 100644
--- a/vm/pimox-haos-vm.sh
+++ b/vm/pimox-haos-vm.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# for testing only
 set -o pipefail
 shopt -s expand_aliases
 alias die='EXIT=$? LINE=$LINENO error_exit'