diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6921341590749b241348bb6e2c0ade7a7e6b56d0..8b32b66bfde5ca3236ef67208b42bd299a2976b0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -97,5 +97,7 @@ trigger-opc-ua-test:
     trigger:
         project: LOFAR2.0/sdptr
         branch: L2SDP-571
+    rules:
+        - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'