diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..71967a6
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,33 @@
+name: Tests
+
+on:
+  push:
+    branches: ['**']
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies (macOS)
+        if: runner.os == 'macOS'
+        run: brew install bats-core jq yq
+
+      - name: Install dependencies (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y bats jq
+          # Install Mike Farah's yq from official releases (matches Homebrew version)
+          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
+          sudo chmod +x /usr/local/bin/yq
+
+      - name: Run BATS tests
+        run: bats --tap bin/tests/*.bats