diff --git a/.github/workflows/test-build-docker-image.yml b/.github/workflows/test-build-docker-image.yml
index 803dcbc73d6a..f9eda86b85b1 100644
--- a/.github/workflows/test-build-docker-image.yml
+++ b/.github/workflows/test-build-docker-image.yml
@@ -62,10 +62,13 @@ jobs:
   invoke-tbp-workflow-for-pg:
     needs: [setup]
     if: github.event_name != 'push' && github.ref == 'refs/heads/release'
-    uses: benc-uk/workflow-dispatch@v1
-    with:
-      workflow: test-build-docker-image.yml
-      inputs: '{ "ref": "pg"}'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger TBP on pg branch
+        uses: benc-uk/workflow-dispatch@v1
+        with:
+          workflow: test-build-docker-image.yml
+          inputs: '{ "ref": "refs/heads/pg"}'
 
   server-build:
     needs: [setup]