diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..9aefa25
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,6 @@
+repos:
+- repo: https://github.com/google/yapf
+  rev: 'v0.40.2'  # Use the sha / tag you want to point at
+  hooks:
+  - id: yapf
+    exclude: docs/conf.py
diff --git a/src/affinder/_tests/test_affinder.py b/src/affinder/_tests/test_affinder.py
index 3e042b0..bd7ab72 100644
--- a/src/affinder/_tests/test_affinder.py
+++ b/src/affinder/_tests/test_affinder.py
@@ -9,7 +9,6 @@
 from scipy import ndimage as ndi
 from pathlib import Path
 
-
 layer0_pts = np.array([[140.38371886,
                         322.5390704], [181.91866481, 319.65803368],
                        [176.15659138, 259.1562627],
@@ -165,7 +164,4 @@ def test_load_affine(tmp_path):
     widget = load_affine()
     widget(layer, affile)
 
-    np.testing.assert_allclose(
-        layer.affine, affine
-    )
-
+    np.testing.assert_allclose(layer.affine, affine)