diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
new file mode 100644
index 0000000..9065b5e
--- /dev/null
+++ b/.github/workflows/format.yaml
@@ -0,0 +1,10 @@
+name: Lint
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: psf/black@stable
diff --git a/some_file.py b/some_file.py
new file mode 100644
index 0000000..1891ab7
--- /dev/null
+++ b/some_file.py
@@ -0,0 +1,7 @@
+a = [
+  1,
+  2,
+  3
+]
+
+print('hello world')