diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 14ad48d..56b2662 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,6 +19,8 @@ jobs:
       - uses: crystal-lang/install-crystal@v1
         with:
           crystal: latest
+      - name: Run tests
+        run: crystal spec
       - name: Install dependencies
         run: shards install --without-development --release
       - name: Build executable