diff --git a/configs/T1023RDB_SDCARD_defconfig b/configs/T1023RDB_SDCARD_defconfig
index 4edc69a..4471c83 100644
--- a/configs/T1023RDB_SDCARD_defconfig
+++ b/configs/T1023RDB_SDCARD_defconfig
@@ -29,6 +29,8 @@
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_SYS_ALT_MEMTEST=y
+CONFIG_SYS_MEMTEST_START=0x00200000
+CONFIG_SYS_MEMTEST_END=0x00400000
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y