diff --git a/sys/boot/userboot/test/test.c b/sys/boot/userboot/test/test.c
index d7ec3e4b5e99..d5707de216a8 100644
--- a/sys/boot/userboot/test/test.c
+++ b/sys/boot/userboot/test/test.c
@@ -414,7 +414,7 @@ void
 usage()
 {
 
-	printf("usage: [-d <disk image path>] [-h <host filesystem path>\n");
+	printf("usage: [-b <userboot shared object>] [-d <disk image path>] [-h <host filesystem path>\n");
 	exit(1);
 }
 
@@ -425,9 +425,14 @@ main(int argc, char** argv)
 	void (*func)(struct loader_callbacks *, void *, int, int);
 	int opt;
 	char *disk_image = NULL;
+	const char *userboot_obj = "/boot/userboot.so";
 
-	while ((opt = getopt(argc, argv, "d:h:")) != -1) {
+	while ((opt = getopt(argc, argv, "b:d:h:")) != -1) {
 		switch (opt) {
+		case 'b':
+			userboot_obj = optarg;
+			break;
+
 		case 'd':
 			disk_image = optarg;
 			break;
@@ -441,8 +446,7 @@ main(int argc, char** argv)
 		}
 	}
 
-	h = dlopen("/boot/userboot.so",
-            RTLD_LOCAL);
+	h = dlopen(userboot_obj, RTLD_LOCAL);
 	if (!h) {
 		printf("%s\n", dlerror());
 		return (1);