diff --git a/.github/workflows/diff-check.yml b/.github/workflows/diff-check.yml
index d9d882353..79f061833 100644
--- a/.github/workflows/diff-check.yml
+++ b/.github/workflows/diff-check.yml
@@ -14,3 +14,18 @@ jobs:
       - uses: nickcharlton/diff-check@main
         with:
           command: bundle exec appraisal
+
+  builds:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JS
+        uses: actions/setup-node@v4
+        with:
+          cache: yarn
+      - run: yarn install --frozen-lockfile
+      - uses: nickcharlton/diff-check@main
+        with:
+          command: |
+            yarn build
+            yarn build:css