diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index 0904aa012..0b0bd1295 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -605,6 +605,7 @@ def test_autocontrast_preserve_one_color(color: tuple[int, int, int]) -> None:
     )  # single color 10 cutoff
     assert_image_equal(img, out)
 
+
 def test_dither_primary_returns_image():
     im = Image.new("RGB", (4, 4), (128, 128, 128))
     out = ImageOps.dither_primary(im)