diff --git a/.github/workflows/docker-chatbot-rag-app.yml b/.github/workflows/docker-chatbot-rag-app.yml
index 6ff70b3f..04afc48c 100644
--- a/.github/workflows/docker-chatbot-rag-app.yml
+++ b/.github/workflows/docker-chatbot-rag-app.yml
@@ -48,6 +48,10 @@ jobs:
         id: build
         with:
           context: example-apps/chatbot-rag-app
+          # If this is a pull request, tag the image locally for testing.
+          tags: ${{ github.event_name == 'pull_request' && format('{0}:latest', env.IMAGE) || '' }}
+          # When pushing to main, push this image to the repository by digest
+          # which is later used to assemble a multi-architecture image.
           outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=${{ github.event_name == 'push' && 'true' || 'false' }}
           cache-from: type=gha
           cache-to: type=gha,mode=max