diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 447469d4323836bc0cf9c4a61ea506985754eeca..42524301b70a2858dcc82867ea6585d57493382b 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -3,4 +3,5 @@ RUN apt-get update && \
 	apt-get install docker.io tox curl python3-pip -y
 RUN pip3 install docker-compose
 COPY wait-for-it.sh /wait-for-it.sh
-CMD /wait-for-it.sh caosdb-server:10443 -t 120 -- curl https://caosdb-server:10443
+COPY ../tests /tests
+CMD /wait-for-it.sh caosdb-server:10443 -t 120 -- tox /tests
diff --git a/.docker/tester.yml b/.docker/tester.yml
index 50ea2822e5361429d3b807a0abf13b17f8b507c2..2d22c8b32eabd3d2268b06e02929ea11542eb5fc 100644
--- a/.docker/tester.yml
+++ b/.docker/tester.yml
@@ -2,3 +2,8 @@ version: '3.7'
 services:
   tester:
     image: "$CI_REGISTRY_IMAGE:latest"
+    networks:
+      - docker_caosnet
+networks:
+  docker_caosnet:
+    external: true