diff --git a/Tests/test_image_thumbnail.py b/Tests/test_image_thumbnail.py
index 2cc2d732d..0f2955574 100644
--- a/Tests/test_image_thumbnail.py
+++ b/Tests/test_image_thumbnail.py
@@ -57,10 +57,11 @@ class TestImageThumbnail(PillowTestCase):
     def test_DCT_scaling_edges(self):
         # Make an image with red borders and size (N * 8) + 1 to cross DCT grid
         im = Image.new("RGB", (257, 257), "red")
-        im.paste(Image.new("RGB", (255, 255)), (1, 1))
+        im.paste(Image.new("RGB", (235, 235)), (11, 11))
 
         thumb = fromstring(tostring(im, "JPEG", quality=99, subsampling=0))
         thumb.thumbnail((32, 32), Image.BICUBIC)
 
         ref = im.resize((32, 32), Image.BICUBIC)
-        self.assert_image_similar(thumb, ref, 2)
+        # This is still JPEG, some error is present. Without the fix it is 11.5
+        self.assert_image_similar(thumb, ref, 1.5)