diff --git a/boards/risc-v/mpfs/icicle/configs/knsh/defconfig b/boards/risc-v/mpfs/icicle/configs/knsh/defconfig
index 01f67a106c..fc2f02277f 100644
--- a/boards/risc-v/mpfs/icicle/configs/knsh/defconfig
+++ b/boards/risc-v/mpfs/icicle/configs/knsh/defconfig
@@ -21,6 +21,7 @@ CONFIG_ARCH_DATA_VBASE=0xC0000000
 CONFIG_ARCH_HEAP_NPAGES=0
 CONFIG_ARCH_HEAP_VBASE=0x00000000
 CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_KERNEL_STACKSIZE=2048
 CONFIG_ARCH_PGPOOL_MAPPING=y
 CONFIG_ARCH_PGPOOL_PBASE=0x80200000
 CONFIG_ARCH_PGPOOL_SIZE=4194304
@@ -49,6 +50,7 @@ CONFIG_EXAMPLES_HELLO=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_FS_PROCFS=y
 CONFIG_FS_ROMFS=y
+CONFIG_HAVE_CXX=y
 CONFIG_IDLETHREAD_STACKSIZE=2048
 CONFIG_INIT_STACKSIZE=3072
 CONFIG_INTELHEX_BINARY=y
@@ -91,4 +93,5 @@ CONFIG_SYSTEM_CLE_CMD_HISTORY=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_NSH_PROGNAME="init"
 CONFIG_SYSTEM_TIME64=y
+CONFIG_TESTING_CXXTEST=y
 CONFIG_UART1_SERIAL_CONSOLE=y