diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/BlackWhiteTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/BlackWhiteTest.cs
index 4174e9b3ab..e373230a73 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/BlackWhiteTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/BlackWhiteTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -19,23 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(ctx => ctx.BlackWhite());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplyBlackWhiteFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            // TODO: We need a DRY-refactor on these tests for all Filter tests!
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Width / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.BlackWhite(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
index ced0a3ca72..783e55d832 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/BrightnessTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
@@ -26,22 +24,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         {
             provider.RunValidatingProcessorTest(ctx => ctx.Brightness(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(BrightnessValues), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyBrightnessFilterInBox<TPixel>(TestImageProvider<TPixel> provider, float value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Width / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Brightness(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
index 06519931e8..c0df24d291 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/ColorBlindnessTest.cs
@@ -3,9 +3,7 @@
 
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -33,22 +31,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.ColorBlindness(colorBlindness), colorBlindness.ToString());
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(ColorBlindnessFilters), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyColorBlindnessFilterInBox<TPixel>(TestImageProvider<TPixel> provider, ColorBlindness colorBlindness)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Width / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.ColorBlindness(colorBlindness, bounds));
-                image.DebugSave(provider, colorBlindness.ToString());
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/ContrastTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/ContrastTest.cs
index 0154f8a674..b532649b3d 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/ContrastTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/ContrastTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
@@ -26,22 +24,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         {
             provider.RunValidatingProcessorTest(x => x.Contrast(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(ContrastValues), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyContrastFilterInBox<TPixel>(TestImageProvider<TPixel> provider, float value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Width / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Contrast(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
index bd66a29eec..515b970aee 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/FilterTest.cs
@@ -21,10 +21,7 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         public void ApplyFilter<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            Matrix4x4 brightness = MatrixFilters.CreateBrightnessFilter(0.9F);
-            Matrix4x4 hue = MatrixFilters.CreateHueFilter(180F);
-            Matrix4x4 saturation = MatrixFilters.CreateSaturateFilter(1.5F);
-            Matrix4x4 m = brightness * hue * saturation;
+            Matrix4x4 m = CreateCombinedTestFilterMatrix();
 
             provider.RunValidatingProcessorTest(x => x.Filter(m));
         }
@@ -34,19 +31,19 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         public void ApplyFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
             where TPixel : struct, IPixel<TPixel>
         {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Width / 4, image.Width / 2, image.Height / 2);
-
-                Matrix4x4 brightness = MatrixFilters.CreateBrightnessFilter(0.9F);
-                Matrix4x4 hue = MatrixFilters.CreateHueFilter(180F);
-                Matrix4x4 saturation = MatrixFilters.CreateSaturateFilter(1.5F);
-                image.Mutate(x => x.Filter(brightness * hue * saturation, bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
+            Matrix4x4 m = CreateCombinedTestFilterMatrix();
+
+            provider.RunRectangleConstrainedValidatingProcessorTest((x, b) => x.Filter(m, b));
         }
+
+        private static Matrix4x4 CreateCombinedTestFilterMatrix()
+        {
+            Matrix4x4 brightness = MatrixFilters.CreateBrightnessFilter(0.9F);
+            Matrix4x4 hue = MatrixFilters.CreateHueFilter(180F);
+            Matrix4x4 saturation = MatrixFilters.CreateSaturateFilter(1.5F);
+            Matrix4x4 m = brightness * hue * saturation;
+            return m;
+        }
+
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/GrayscaleTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/GrayscaleTest.cs
index 1991663916..f61c529a38 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/GrayscaleTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/GrayscaleTest.cs
@@ -4,9 +4,7 @@
 using SixLabors.ImageSharp.Advanced;
 using SixLabors.ImageSharp.PixelFormats;
 using SixLabors.ImageSharp.Processing;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -31,22 +29,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Grayscale(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(GrayscaleModeTypes), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyGrayscaleFilterInBox<TPixel>(TestImageProvider<TPixel> provider, GrayscaleMode value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Grayscale(value, bounds));
-                image.DebugSave(provider, value.ToString());
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/HueTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/HueTest.cs
index 0cf42a8d57..fe9f9d5db2 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/HueTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/HueTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -26,22 +24,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Hue(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(HueValues), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyHueFilterInBox<TPixel>(TestImageProvider<TPixel> provider, int value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Hue(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/InvertTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/InvertTest.cs
index b075a059de..452397c5eb 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/InvertTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/InvertTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
@@ -19,22 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         {
             provider.RunValidatingProcessorTest(x => x.Invert());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplyInvertFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Invert(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/KodachromeTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/KodachromeTest.cs
index f133da34a0..a5165250b7 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/KodachromeTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/KodachromeTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -19,22 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Kodachrome());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplyKodachromeFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Kodachrome(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/LomographTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/LomographTest.cs
index 08a4e6ff9f..09c8becec3 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/LomographTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/LomographTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -19,22 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Lomograph());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplyLomographFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Lomograph(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/OpacityTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/OpacityTest.cs
index 9f888c09f5..2cba4fb8ed 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/OpacityTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/OpacityTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
@@ -26,22 +24,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Effects
         {
             provider.RunValidatingProcessorTest(x => x.Opacity(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(AlphaValues), 48, 48, PixelTypes.Rgba32)]
-        public void ApplyAlphaFilterInBox<TPixel>(TestImageProvider<TPixel> provider, float value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Opacity(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/PolaroidTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/PolaroidTest.cs
index aa5b773cd9..4e0347d2a4 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/PolaroidTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/PolaroidTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -19,22 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Polaroid());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplyPolaroidFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Polaroid(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/SaturateTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/SaturateTest.cs
index 440564c26f..9b963b94a4 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/SaturateTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/SaturateTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -26,22 +24,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Saturate(value), value);
         }
-
-        [Theory]
-        [WithTestPatternImages(nameof(SaturationValues), 48, 48, PixelTypes.Rgba32)]
-        public void ApplySaturationFilterInBox<TPixel>(TestImageProvider<TPixel> provider, float value)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Saturate(value, bounds));
-                image.DebugSave(provider, value);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Processors/Filters/SepiaTest.cs b/tests/ImageSharp.Tests/Processing/Processors/Filters/SepiaTest.cs
index 71b8f311f3..2a63e992d7 100644
--- a/tests/ImageSharp.Tests/Processing/Processors/Filters/SepiaTest.cs
+++ b/tests/ImageSharp.Tests/Processing/Processors/Filters/SepiaTest.cs
@@ -2,9 +2,7 @@
 // Licensed under the Apache License, Version 2.0.
 
 using SixLabors.ImageSharp.PixelFormats;
-using SixLabors.ImageSharp.Tests.TestUtilities.ImageComparison;
 
-using SixLabors.Primitives;
 using Xunit;
 
 namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
@@ -19,22 +17,5 @@ namespace SixLabors.ImageSharp.Tests.Processing.Processors.Filters
         {
             provider.RunValidatingProcessorTest(x => x.Sepia());
         }
-
-        [Theory]
-        [WithTestPatternImages(48, 48, PixelTypes.Rgba32)]
-        public void ApplySepiaFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
-            where TPixel : struct, IPixel<TPixel>
-        {
-            using (Image<TPixel> source = provider.GetImage())
-            using (Image<TPixel> image = source.Clone())
-            {
-                var bounds = new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2);
-
-                image.Mutate(x => x.Sepia(bounds));
-                image.DebugSave(provider);
-
-                ImageComparer.Tolerant().VerifySimilarityIgnoreRegion(source, image, bounds);
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
index 9050db15cb..7ba890e71e 100644
--- a/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
+++ b/tests/ImageSharp.Tests/TestUtilities/TestUtils.cs
@@ -165,6 +165,9 @@ namespace SixLabors.ImageSharp.Tests
             }
         }
 
+        /// <summary>
+        /// Same as <see cref="RunValidatingProcessorTest{TPixel}"/> but with an additional <see cref="Rectangle"/> parameter passed to 'process'
+        /// </summary>
         internal static void RunRectangleConstrainedValidatingProcessorTest<TPixel>(
             this TestImageProvider<TPixel> provider,
             Action<IImageProcessingContext<TPixel>, Rectangle> process,
diff --git a/tests/Images/External b/tests/Images/External
index e12e75f129..ddc4045926 160000
--- a/tests/Images/External
+++ b/tests/Images/External
@@ -1 +1 @@
-Subproject commit e12e75f12925de1b88dc7e564c509ee896aa5f53
+Subproject commit ddc4045926bb0331be8c1785d9adf5f76dc4e52e