diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 4c4e4809be7..54120c2cc64 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -189,7 +189,9 @@ CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
 CONFIG_ERRNO_STR=y
+CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_UNIT_TEST=y
 CONFIG_UT_TIME=y
 CONFIG_UT_DM=y
 CONFIG_UT_ENV=y
+CONFIG_UT_OVERLAY=y