diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 7563a20ee..78af3ce16 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -1,6 +1,7 @@
 name: Github Actions Tests
 
 on:
+  workflow_dispatch:
   workflow_call:
   pull_request:
 
@@ -134,3 +135,6 @@ jobs:
           npm run cypress:server > /dev/null 2>&1 &
           sleep 5
           npm run cypress:test
+
+  check-docker-base-images-are-manifests:
+    uses: alphagov/pay-ci/.github/workflows/_validate_docker_image_is_manifest.yml@pp-12015/add-reusable-workflow-to-check-manifests