diff --git a/boards/arm/ra8m1/ek-ra8m1/configs/serial-test/defconfig b/boards/arm/ra8m1/ek-ra8m1/configs/serial-test/defconfig
new file mode 100644
index 00000000000..a48af98a7fd
--- /dev/null
+++ b/boards/arm/ra8m1/ek-ra8m1/configs/serial-test/defconfig
@@ -0,0 +1,53 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="ek-ra8m1"
+CONFIG_ARCH_BOARD_EK_RA8M1=y
+CONFIG_ARCH_CHIP="ra8m1"
+CONFIG_ARCH_CHIP_R7FA8M1AHECBD=y
+CONFIG_ARCH_CHIP_RA8M1=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LOOPSPERMSEC=43103
+CONFIG_BUILTIN=y
+CONFIG_EXAMPLES_SERIALBLASTER=y
+CONFIG_EXAMPLES_SERIALBLASTER_DEVPATH="/dev/ttyS1"
+CONFIG_EXAMPLES_SERIALRX=y
+CONFIG_EXAMPLES_SERIALRX_DEVPATH="/dev/ttyS1"
+CONFIG_EXAMPLES_SERIALRX_PRINTSTR=y
+CONFIG_FS_PROCFS=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_DISABLE_IFUPDOWN=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=917504
+CONFIG_RAM_START=0x22000000
+CONFIG_RA_SCI0_FIFO=y
+CONFIG_RA_SCI0_FIFO_RXTRG=0
+CONFIG_RA_SCI0_FIFO_TXTRG=15
+CONFIG_RA_SCI0_UART=y
+CONFIG_RA_SCI9_UART=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SCI0_RXBUFSIZE=1024
+CONFIG_SCI0_TXBUFSIZE=1024
+CONFIG_SCI9_SERIAL_CONSOLE=y
+CONFIG_SERIAL_TERMIOS=y
+CONFIG_START_DAY=28
+CONFIG_START_MONTH=6
+CONFIG_START_YEAR=2013
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_STTY=y
+CONFIG_TASK_NAME_SIZE=32
+CONFIG_TESTING_OSTEST=y
+CONFIG_TESTING_OSTEST_NBARRIER_THREADS=3
+CONFIG_TESTING_OSTEST_STACKSIZE=2048
diff --git a/boards/arm/ra8m1/ek-ra8m1/include/board.h b/boards/arm/ra8m1/ek-ra8m1/include/board.h
index 881c3eed67f..c2e1d16dcf3 100644
--- a/boards/arm/ra8m1/ek-ra8m1/include/board.h
+++ b/boards/arm/ra8m1/ek-ra8m1/include/board.h
@@ -321,6 +321,9 @@
 #define GPIO_SCI9_RX   GPIO_RXD9_MISO9_SCL9_3  /* PA15 */
 #define GPIO_SCI9_TX   GPIO_TXD9_MOSI9_SDA9_3  /* PA14 */
 
+#define GPIO_SCI0_RX   GPIO_RXD0_MISO0_SCL0_3  /* P610 */
+#define GPIO_SCI0_TX   GPIO_TXD0_MOSI0_SDA0_3  /* P609 */
+
 /* Arduino shield header pin selections *************************************/
 
 /* D2-D5 are wired as inputs, D6-D13 as outputs (see