diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d8412dbda..cf218ce3d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,6 +8,10 @@ variables:
 
 image: maven:3-openjdk-11-slim
 
+workflow:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+
 before_script:
   - free -mh