diff --git a/tests/bsim/bluetooth/host/misc/conn_stress/scripts/_conn_stress.sh b/tests/bsim/bluetooth/host/misc/conn_stress/scripts/_conn_stress.sh
index 94228bdc986..4b10172cdd3 100755
--- a/tests/bsim/bluetooth/host/misc/conn_stress/scripts/_conn_stress.sh
+++ b/tests/bsim/bluetooth/host/misc/conn_stress/scripts/_conn_stress.sh
@@ -2,6 +2,8 @@
 # Copyright (c) 2023 Nordic Semiconductor
 # SPDX-License-Identifier: Apache-2.0
 
+source ${ZEPHYR_BASE}/tests/bsim/sh_common.source
+
 simulation_id="conn_stress"
 process_ids=""; exit_code=0
 
@@ -20,28 +22,23 @@ function Execute(){
   echo "Running $@"
 }
 
-: "${BSIM_OUT_PATH:?BSIM_OUT_PATH must be defined}"
-
-#Give a default value to BOARD if it does not have one yet:
-BOARD="${BOARD:-nrf52_bsim}"
-
 test_path="bsim_bluetooth_host_misc_conn_stress"
 bsim_central_exe_name="bs_nrf52_${test_path}_central_prj_conf"
 bsim_peripheral_exe_name="bs_nrf52_${test_path}_peripheral_prj_conf"
 
 # terminate running simulations (if any)
-${BSIM_COMPONENTS_PATH}/common/stop_bsim.sh
+${BSIM_COMPONENTS_PATH}/common/stop_bsim.sh $simulation_id
 
 # (re)Build the central & peripheral images. Don't continue if build fails.
 west build -b ${BOARD} -d build_central central && \
     cp build_central/zephyr/zephyr.exe \
     "${BSIM_OUT_PATH}/bin/${bsim_central_exe_name}" \
-    || exit
+    || exit 1
 
 west build -b ${BOARD} -d build_peripheral peripheral && \
     cp build_peripheral/zephyr/zephyr.exe \
     "${BSIM_OUT_PATH}/bin/${bsim_peripheral_exe_name}" \
-    || exit
+    || exit 1
 
 cd ${BSIM_OUT_PATH}/bin