diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index dbcf65d..dd0582d 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -3,7 +3,6 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox64"
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_PRE_CON_BUF_ADDR=0x100000
 CONFIG_SYS_LOAD_ADDR=0x0
@@ -271,3 +270,6 @@
 CONFIG_EFI_RT_VOLATILE_STORE=y
 CONFIG_EFI_SECURE_BOOT=y
 CONFIG_TEST_FDTDEC=y
+CONFIG_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index ec7e7d0..484f9e1 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -3,7 +3,6 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_PRE_CON_BUF_ADDR=0xf0000
 CONFIG_SYS_LOAD_ADDR=0x0
@@ -347,9 +346,6 @@
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_ECDSA=y
 CONFIG_ECDSA_VERIFY=y
-CONFIG_CRYPT_PW=y
-CONFIG_CRYPT_PW_SHA256=y
-CONFIG_CRYPT_PW_SHA512=y
 CONFIG_TPM=y
 CONFIG_ERRNO_STR=y
 CONFIG_GETOPT=y
@@ -361,3 +357,6 @@
 CONFIG_EFI_CAPSULE_CRT_FILE="board/sandbox/capsule_pub_key_good.crt"
 CONFIG_EFI_SECURE_BOOT=y
 CONFIG_TEST_FDTDEC=y
+CONFIG_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index b87bd14..049a606 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -2,7 +2,6 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
@@ -229,3 +228,6 @@
 CONFIG_EFI_CAPSULE_FIRMWARE_FIT=y
 CONFIG_EFI_CAPSULE_AUTHENTICATE=y
 CONFIG_EFI_CAPSULE_CRT_FILE="board/sandbox/capsule_pub_key_good.crt"
+CONFIG_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/sandbox_noinst_defconfig b/configs/sandbox_noinst_defconfig
index 6150f55..e930162 100644
--- a/configs/sandbox_noinst_defconfig
+++ b/configs/sandbox_noinst_defconfig
@@ -6,7 +6,6 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_SPL_DM_SPI=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL=y
@@ -132,7 +131,6 @@
 CONFIG_IP_DEFRAG=y
 CONFIG_BOOTP_SERVERIP=y
 CONFIG_SPL_DM=y
-CONFIG_SPL_DM_DEVICE_REMOVE=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
 CONFIG_SPL_REGMAP=y
@@ -279,10 +277,12 @@
 # CONFIG_SPL_USE_TINY_PRINTF is not set
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_RSA_VERIFY_WITH_PKEY=y
-CONFIG_X509_CERTIFICATE_PARSER=y
-CONFIG_PKCS7_MESSAGE_PARSER=y
 CONFIG_TPM=y
 CONFIG_ZSTD=y
 CONFIG_SPL_LZMA=y
 CONFIG_ERRNO_STR=y
 CONFIG_SPL_LMB=y
+CONFIG_UNIT_TEST=y
+CONFIG_SPL_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index 3dd4c7a..31ccdbd 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -5,7 +5,6 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
@@ -108,7 +107,6 @@
 CONFIG_IP_DEFRAG=y
 CONFIG_BOOTP_SERVERIP=y
 CONFIG_SPL_DM=y
-CONFIG_SPL_DM_DEVICE_REMOVE=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
 CONFIG_SPL_REGMAP=y
@@ -245,8 +243,6 @@
 # CONFIG_SPL_USE_TINY_PRINTF is not set
 CONFIG_CMD_DHRYSTONE=y
 CONFIG_RSA_VERIFY_WITH_PKEY=y
-CONFIG_X509_CERTIFICATE_PARSER=y
-CONFIG_PKCS7_MESSAGE_PARSER=y
 CONFIG_TPM=y
 CONFIG_SPL_CRC8=y
 CONFIG_ZSTD=y
@@ -254,3 +250,7 @@
 CONFIG_ERRNO_STR=y
 CONFIG_SPL_HEXDUMP=y
 CONFIG_SPL_LMB=y
+CONFIG_UNIT_TEST=y
+CONFIG_SPL_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/sandbox_vpl_defconfig b/configs/sandbox_vpl_defconfig
index f69eb76..7cce422 100644
--- a/configs/sandbox_vpl_defconfig
+++ b/configs/sandbox_vpl_defconfig
@@ -5,7 +5,6 @@
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
 CONFIG_SPL_TEXT_BASE=0x100000
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_DM_RESET=y
 CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL=y
@@ -123,7 +122,6 @@
 CONFIG_IP_DEFRAG=y
 CONFIG_SPL_DM=y
 CONFIG_TPL_DM=y
-CONFIG_SPL_DM_DEVICE_REMOVE=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_DM_DMA=y
 CONFIG_REGMAP=y
@@ -258,3 +256,7 @@
 CONFIG_ZSTD=y
 # CONFIG_VPL_LZMA is not set
 CONFIG_ERRNO_STR=y
+CONFIG_UNIT_TEST=y
+CONFIG_SPL_UNIT_TEST=y
+CONFIG_UT_TIME=y
+CONFIG_UT_DM=y
diff --git a/configs/snow_defconfig b/configs/snow_defconfig
index 637c51d..2c07571 100644
--- a/configs/snow_defconfig
+++ b/configs/snow_defconfig
@@ -19,7 +19,6 @@
 CONFIG_ENV_SECT_SIZE=0x4000
 CONFIG_DEFAULT_DEVICE_TREE="exynos5250-snow"
 CONFIG_SPL_TEXT_BASE=0x02023400
-CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_SPL=y
 CONFIG_DEBUG_UART_BASE=0x12c30000
 CONFIG_DEBUG_UART_CLOCK=100000000
@@ -108,3 +107,4 @@
 CONFIG_VIDEO_BRIDGE_NXP_PTN3460=y
 CONFIG_TPM=y
 CONFIG_ERRNO_STR=y
+CONFIG_UNIT_TEST=y