diff --git a/Tests/test_file_webp_alpha.py b/Tests/test_file_webp_alpha.py
index 07df7a068..5a57d591a 100644
--- a/Tests/test_file_webp_alpha.py
+++ b/Tests/test_file_webp_alpha.py
@@ -96,6 +96,7 @@ def test_write_rgba(tmp_path):
         else:
             assert_image_similar(image, pil_image, 1.0)
 
+
 def test_write_rgba_keep_transparent(tmp_path):
     """
     Can we write a RGBA mode file to WebP while preserving
@@ -111,7 +112,7 @@ def test_write_rgba_keep_transparent(tmp_path):
     # make a single channel image with the same size as input_image
     new_alpha = Image.new("L", input_image.size, 255)
     # make the left half transparent
-    new_alpha.paste((0,), (0, 0, new_alpha.size[0]//2, new_alpha.size[1]))
+    new_alpha.paste((0,), (0, 0, new_alpha.size[0] // 2, new_alpha.size[1]))
     # putalpha on output_image
     output_image.putalpha(new_alpha)
 
@@ -130,7 +131,6 @@ def test_write_rgba_keep_transparent(tmp_path):
         assert_image_similar(image, input_image, 1.0)
 
 
-
 def test_write_unsupported_mode_PA(tmp_path):
     """
     Saving a palette-based file with transparency to WebP format