diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 465ef30..9a4ef34 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -7,6 +7,9 @@ on:
     paths:
       - "Dockerfile"
       - "**/*.R"
+  pull_request:
+    branches:
+      - main
 
 jobs:
   build-and-push:
@@ -38,7 +41,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: .devcontainer/Dockerfile.R
+          file: Dockerfile
           tags: |
             ghcr.io/${{ github.repository_owner }}/${{ env.PACKAGE }}:${{ env.VERSION }}
             ghcr.io/${{ github.repository_owner }}/${{ env.PACKAGE }}:latest
@@ -71,5 +74,6 @@ jobs:
 
       - name: Run Container Tests
         run:
-          docker run --rm ghcr.io/${{ github.repository_owner }}/${{ env.PACKAGE
-          }}:${{env.VERSION }} R -e "devtools::test()"
+          docker run --rm --entrypoint "R" ghcr.io/${{ github.repository_owner
+          }}/${{ env.PACKAGE }}:${{env.VERSION }} -e
+          "library(biodiversityhorizons)"