diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8a252c89436444923455c055d45d09c69f64495a..26459445738d382bbc85a6b36185c6f3613691bc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -84,4 +84,6 @@ trigger lecture:
     branch: feature/test-dumux-trigger
     strategy: depend
   variables:
-    DUMUX_MERGE_REQUEST_BRANCH: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
+    DUMUX_PIPELINE_SOURCE: $CI_PIPELINE_SOURCE
+    DUMUX_MERGE_REQUEST_SOURCE_BRANCH: $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
+    DUMUX_MERGE_REQUEST_TARGET_BRANCH: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME