diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7542a10
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      # TODO 1: Add a step to set up Python 3.11.
+      #         Use: actions/setup-python@v5 with python-version: "3.11"
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      # TODO 2: Add a step to install pytest.
+      #         Use: pip install pytest
+
+      # TODO 3: Add a step to run pytest.
+      #         Use: pytest -q