diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 66b53b27..a4e4d860 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -1,6 +1,8 @@
 name: Quality Assurance
 
-on: [pull_request]
+on:
+  pull_request:
+    types: [opened]
 
 jobs:
 # github does not support dependencies on other workflows therefore we have to duplicate the code
diff --git a/docker-compose.yml b/docker-compose.yml
index ef27e620..1de33c38 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -57,6 +57,7 @@ services:
     command: ./run.sh
     environment:
       TNB_DATABASES: '{"default":{"CLIENT":{"host":"node-mongo","password":"${MONGO_INITDB_ROOT_PASSWORD}"}}}'
+      TNB_CELERY_BROKER_URL: 'amqp://guest:guest@celery-broker:5672//'
     env_file: .env
     depends_on:
       - node-mongo