diff --git a/run_tests.sh b/run_tests.sh
index 6246d83..9c46841 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -38,11 +38,11 @@ lu.LuaUnit:setOutputType('${FORMAT}')
 lu.LuaUnit:run()
 EOF
 	else
-		cat<<EOF |lua5.1 - --name "${RES}"
+		cat<<EOF |lua5.1 -
 local lu = require('luaunit')
 require "tests/${1}"
 ---- Control test output:
-lu.LuaUnit:setOutputType('${FORMAT}')
+lu.LuaUnit:setOutputType('${FORMAT}', '${RES}')
 lu.LuaUnit:run()
 EOF
 		if [[ "${FORMAT}" = "JUNIT" ]] ; then
@@ -51,7 +51,6 @@ EOF
 	fi
 }
 
-
 if [[ -n "$@" ]]; then
 	for i in "$@"; do
 		if [ ! -f "$i" ]; then
diff --git a/t/Dockerfile b/t/Dockerfile
index e3b847f..e9fbc63 100644
--- a/t/Dockerfile
+++ b/t/Dockerfile
@@ -1,11 +1,11 @@
-# DOCKER_NAME=lua-ngcp-kamailio-bullseye
-FROM docker.mgm.sipwise.com/sipwise-bullseye:latest
+# DOCKER_NAME=lua-ngcp-kamailio-bookworm
+FROM docker.mgm.sipwise.com/sipwise-bookworm:latest
 
 # Important! Update this no-op ENV variable when this Dockerfile
 # is updated with the current date. It will force refresh of all
 # of the base images and things like `apt-get update` won't be using
 # old cached versions when the Dockerfile is built.
-ENV REFRESHED_AT 2021-05-03
+ENV REFRESHED_AT 2023-06-26
 
 # files that get-code generates
 COPY t/sources.list.d/builddeps.list /etc/apt/sources.list.d/
@@ -28,15 +28,15 @@ WORKDIR /code/
 #
 # you need to put the proper NGCP sources at t/sources.list.d/builddeps.list
 # for instance, trunk:
-# echo "deb https://deb.sipwise.com/autobuild/ release-trunk-bullseye main" > t/sources.list.d/builddeps.list
+# echo "deb https://deb.sipwise.com/autobuild/ release-trunk-bookworm main" > t/sources.list.d/builddeps.list
 #
-# % docker build --tag="lua-ngcp-kamailio-bullseye" -f t/Dockerfile .
-# % docker run --rm -i -t -v $(pwd):/code:rw lua-ngcp-kamailio-bullseye:latest bash
+# % docker build --tag="lua-ngcp-kamailio-bookworm" -f t/Dockerfile .
+# % docker run --rm -i -t -v $(pwd):/code:rw lua-ngcp-kamailio-bookworm:latest bash
 #
 # Use the existing docker image:
-# % docker pull docker.mgm.sipwise.com/lua-ngcp-kamailio-bullseye
+# % docker pull docker.mgm.sipwise.com/lua-ngcp-kamailio-bookworm
 # NOTE: run the following command from root folder of git repository:
-# % docker run --rm -i -t -v $(pwd):/code:rw docker.mgm.sipwise.com/lua-ngcp-kamailio-bullseye:latest bash
+# % docker run --rm -i -t -v $(pwd):/code:rw docker.mgm.sipwise.com/lua-ngcp-kamailio-bookworm:latest bash
 #
 # Inside docker (the command is in history, just press UP button):
 #   ./t/testrunner