diff --git a/tests/ImageSharp.Tests/Formats/Png/PngDecoderFilterTests.cs b/tests/ImageSharp.Tests/Formats/Png/PngDecoderFilterTests.cs
index a096c5eb6c..310f53c516 100644
--- a/tests/ImageSharp.Tests/Formats/Png/PngDecoderFilterTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Png/PngDecoderFilterTests.cs
@@ -7,6 +7,7 @@ using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Png
 {
+    [Trait("Format", "Png")]
     public class PngDecoderFilterTests
     {
         private static void RunAverageFilterTest()
@@ -18,7 +19,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                 0, 2, 2, 2, 0, 3, 3, 3, 0, 1, 1, 1, 0, 3, 3, 3, 0, 3, 3, 3, 0, 1, 1, 1, 0, 3, 3, 3, 0, 2, 2, 2, 0,
                 1, 1, 1, 0, 3, 3, 3, 0, 1, 1, 1, 0, 3, 3, 3, 0, 1, 1, 1, 0, 3, 3, 3, 0, 3, 3, 3, 0, 254, 254, 254,
                 0, 6, 6, 6, 14, 71, 71, 71, 157, 254, 254, 254, 28, 251, 251, 251, 0, 4, 4, 4, 0, 2, 2, 2, 0, 11,
-                11, 11, 0, 226, 226, 226, 0, 255
+                11, 11, 0, 226, 226, 226, 0, 255, 128, 234
             };
 
             byte[] previousScanline =
@@ -28,7 +29,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                 74, 74, 0, 72, 72, 72, 0, 73, 73, 73, 0, 75, 75, 75, 0, 73, 73, 73, 0, 74, 74, 74, 0, 72, 72, 72, 0,
                 73, 73, 73, 0, 73, 73, 73, 0, 72, 72, 72, 0, 74, 74, 74, 0, 61, 61, 61, 0, 101, 101, 101, 78, 197,
                 197, 197, 251, 152, 152, 152, 255, 155, 155, 155, 255, 162, 162, 162, 255, 175, 175, 175, 255, 160,
-                160, 160, 255, 139
+                160, 160, 255, 139, 128, 134
             };
 
             byte[] expected =
@@ -38,7 +39,7 @@ namespace SixLabors.ImageSharp.Tests.Formats.Png
                 76, 76, 0, 77, 77, 77, 0, 77, 77, 77, 0, 77, 77, 77, 0, 78, 78, 78, 0, 77, 77, 77, 0, 77, 77, 77, 0,
                 76, 76, 76, 0, 77, 77, 77, 0, 77, 77, 77, 0, 73, 73, 73, 0, 73, 73, 73, 14, 158, 158, 158, 203, 175,
                 175, 175, 255, 158, 158, 158, 255, 160, 160, 160, 255, 163, 163, 163, 255, 180, 180, 180, 255, 140,
-                140, 140, 255, 255
+                140, 140, 255, 138, 6, 115
             };
 
             // act