diff --git a/test/cmd/Makefile b/test/cmd/Makefile
index 8d70ac5..e296ba1 100644
--- a/test/cmd/Makefile
+++ b/test/cmd/Makefile
@@ -24,6 +24,7 @@
 obj-$(CONFIG_CMD_PWM) += pwm.o
 obj-$(CONFIG_CMD_SEAMA) += seama.o
 ifdef CONFIG_SANDBOX
+obj-$(CONFIG_CMD_MBR) += mbr.o
 obj-$(CONFIG_CMD_READ) += rw.o
 obj-$(CONFIG_CMD_SETEXPR) += setexpr.o
 obj-$(CONFIG_ARM_FFA_TRANSPORT) += armffa.o