diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 04b3415..aa9ea90 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -125,3 +125,6 @@ jobs:
     - uses: actions/checkout@v2
     - run: yarn install
     - run: yarn run lint
+    - run: yarn run package
+    - name: Check generated files are up to date
+      run: git diff --exit-code