diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index f0457da..a79980d 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -29,6 +29,8 @@ jobs:
           cache: npm
       - name: Install dependencies
         run: npm ci
+      - name: Build the package
+        run: npm run build
       - name: Check if types are wrong with attw
         run: npx -p @arethetypeswrong/cli attw --pack .