diff --git a/.docker/tester.yml b/.docker/tester.yml
index dc88a13e8e89ef99d7a4ff37e819dbf9bc6dbd37..764fcd63475a8baa1b2e8aed533336f1326c161f 100644
--- a/.docker/tester.yml
+++ b/.docker/tester.yml
@@ -3,6 +3,8 @@ services:
   tester:
     image: "$CPPINTTEST_REGISTRY_IMAGE"
     environment:
+      CAOSDB_SERVER_HOST: caosdb-server
+      CAOSDB_SERVER_CERT: /cert/caosdb.cert.pem
       CAOSDB_CLIENT_CONFIGURATION: /caosdb-client.json
     networks:
       - docker_caosnet