test fix

linux-live/minioslib

@@ -23,6 +23,7 @@ function common_variables() {
 	set -u
 	if [ -f /.dockerenv ] || [ "$container" = "podman" ]; then
 		OUTPUT="/dev/stdout"
+		CONTAINER="docker"
 	fi
 
 	# if = "1", creates a second iso with a constant filename