diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
index 3d5223d98..90f874b60 100644
--- a/Tests/test_imageops.py
+++ b/Tests/test_imageops.py
@@ -321,8 +321,10 @@ def test_autocontrast_mask_toy_input():
 
         rect_mask = Image.new("L", img.size, 0)
         draw = ImageDraw.Draw(rect_mask)
-        x0, y0 = img.size[0] // 4, img.size[1] // 4
-        x1, y1 = 3 * img.size[0] // 4, 3 * img.size[1] // 4
+        x0 = img.size[0] // 4
+        y0 = img.size[1] // 4
+        x1 = 3 * img.size[0] // 4
+        y1 = 3 * img.size[1] // 4
         draw.rectangle((x0, y0, x1, y1), fill=255)
 
         assert ImageOps.autocontrast(img, mask=rect_mask) != ImageOps.autocontrast(img)