diff --git a/docker-compose.tests.yml b/docker-compose.tests.yml
index 395e8702..19bd4b82 100644
--- a/docker-compose.tests.yml
+++ b/docker-compose.tests.yml
@@ -8,6 +8,7 @@ services:
       GITLAB_ROOT_PASSWORD: ${GITLAB_ROOT_PASSWORD}
       GITLAB_OMNIBUS_CONFIG: |
         external_url 'http://127.0.0.1:8929'
+        puma['worker_processes'] = 0
     volumes:
       - config-ce:/etc/gitlab
       - logs-ce:/var/log/gitlab