diff --git a/boards/sim/sim/sim/configs/posix_test/defconfig b/boards/sim/sim/sim/configs/posix_test/defconfig
index c9a79c18664..4e936955c26 100644
--- a/boards/sim/sim/sim/configs/posix_test/defconfig
+++ b/boards/sim/sim/sim/configs/posix_test/defconfig
@@ -59,6 +59,8 @@ CONFIG_LIBC_NUMBERED_ARGS=y
 CONFIG_LIBC_PASSWD_FILE=y
 CONFIG_MQ_MAXMSGSIZE=64
 CONFIG_NDEBUG=y
+CONFIG_NET=y
+CONFIG_NET_SOCKOPTS=y
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILE_APPS=y
@@ -81,7 +83,6 @@ CONFIG_SCHED_LPNTHREADS=1
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_SPORADIC=y
 CONFIG_SCHED_USER_IDENTITY=y
-CONFIG_SCHED_WAITPID=y
 CONFIG_SIG_DEFAULT=y
 CONFIG_SIG_EVTHREAD=y
 CONFIG_SIM_HOSTFS=y
@@ -91,6 +92,7 @@ CONFIG_START_MONTH=6
 CONFIG_START_YEAR=2008
 CONFIG_SYSTEM_DUMPSTACK=y
 CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_SYSTEM=y
 CONFIG_TESTING_LTP=y
 CONFIG_TLS_NCLEANUP=4
 CONFIG_TLS_NELEM=16