diff --git a/boards/sim/sim/sim/configs/nsh/defconfig b/boards/sim/sim/sim/configs/nsh/defconfig
index 87d66486d2b5a..8517209444075 100644
--- a/boards/sim/sim/sim/configs/nsh/defconfig
+++ b/boards/sim/sim/sim/configs/nsh/defconfig
@@ -18,6 +18,9 @@ CONFIG_BOOT_RUNFROMEXTSRAM=y
 CONFIG_BUILTIN=y
 CONFIG_COVERAGE_ALL=y
 CONFIG_COVERAGE_TOOLCHAIN=y
+CONFIG_DEBUG_ASSERTIONS=y
+CONFIG_DEBUG_ASSERTIONS_EXPRESSION=y
+CONFIG_DEBUG_FEATURES=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DEV_GPIO=y
 CONFIG_DEV_LOOP=y
@@ -47,6 +50,7 @@ CONFIG_LIBC_LOCALE_CATALOG=y
 CONFIG_LIBC_LOCALE_GETTEXT=y
 CONFIG_LIBC_MAX_EXITFUNS=1
 CONFIG_LIBC_NUMBERED_ARGS=y
+CONFIG_NDEBUG=y
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILE_APPS=y