diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..62c4bb1
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,36 @@
+name: Test
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/**"
+      - "shard.*"
+      - "spec/**"
+      - "src/**"
+
+  pull_request:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/**"
+      - "shard.*"
+      - "spec/**"
+      - "src/**"
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: crystal-lang/install-crystal@v1
+      - run: crystal tool format --check
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: crystal-lang/install-crystal@v1
+      - run: shards install
+      - run: crystal spec