diff --git a/ci/runchecks.sh b/ci/runchecks.sh
index c8bc15fc..0eb0fef6 100755
--- a/ci/runchecks.sh
+++ b/ci/runchecks.sh
@@ -1,24 +1,24 @@
 #!/bin/bash
 
 set -x
 set -e
 
 # Setup
 git stash
 git pull
 docker compose pull --ignore-buildable
 env HOST=kolab.local ADMIN_PASSWORD=simple123 bin/configure.sh config.demo
 bin/quickstart.sh --nodev
 
 # Ensure the environment is functional
 # env ADMIN_USER=john@kolab.org ADMIN_PASSWORD=simple123 bin/selfcheck.sh
 ADMIN_USER=john@kolab.org
 ADMIN_PASSWORD=simple123
 APP_DOMAIN=$(grep APP_DOMAIN .env | tail -n1 | sed "s/APP_DOMAIN=//")
 docker compose exec postfix testsaslauthd -u "$ADMIN_USER" -p "$ADMIN_PASSWORD"
 docker compose exec imap testsaslauthd -u "$ADMIN_USER" -p "$ADMIN_PASSWORD"
-docker compose -f docker-compose.build.yml run -ti --rm  utils ./kolabendpointtester.py --verbose --host "$APP_DOMAIN" --dav "https://$APP_DOMAIN/dav/" --imap "$APP_DOMAIN" --activesync "$APP_DOMAIN"  --user "$ADMIN_USER" --password "$ADMIN_PASSWORD"
+docker compose -f docker-compose.yml -f docker-compose.build.yml run -ti --rm  utils ./kolabendpointtester.py --verbose --host "$APP_DOMAIN" --dav "https://$APP_DOMAIN/dav/" --imap "$APP_DOMAIN" --activesync "$APP_DOMAIN"  --user "$ADMIN_USER" --password "$ADMIN_PASSWORD"
 
 # Run the tests
 docker rm kolab-tests >/dev/null 2>/dev/null || :
 docker run --rm --network=kolab_kolab -v ${PWD}/src:/src/kolabsrc.orig --name kolab-tests -t kolab-tests /init.sh testsuite
diff --git a/docker-compose.build.yml b/docker-compose.build.yml
index d95e3b96..e1d2b612 100644
--- a/docker-compose.build.yml
+++ b/docker-compose.build.yml
@@ -1,18 +1,23 @@
 version: '3'
 services:
   swoole:
     build:
       context: ./docker/swoole/
     container_name: kolab-swoole
     image: apheleia/swoole
   tests:
     build:
       context: ./docker/tests/
     container_name: kolab-tests
     image: kolab-tests
   utils:
     build:
       context: ./docker/utils/
     container_name: kolab-utils
     image: kolab-utils
-    network_mode: "host"
+    dns: 172.18.0.11
+    extra_hosts:
+      - "${APP_DOMAIN}:172.18.0.7"
+    networks:
+      kolab:
+        ipv4_address: 172.18.0.27