diff --git a/src/ImageSharp/Processing/Overlays/Glow.cs b/src/ImageSharp/Processing/Overlays/Glow.cs
index 587bbe6104..04c85e00c7 100644
--- a/src/ImageSharp/Processing/Overlays/Glow.cs
+++ b/src/ImageSharp/Processing/Overlays/Glow.cs
@@ -5,8 +5,6 @@
 
 namespace ImageSharp
 {
-    using System;
-
     using ImageSharp.PixelFormats;
 
     using Processing.Processors;
@@ -158,7 +156,7 @@ namespace ImageSharp
         public static Image<TPixel> Glow<TPixel>(this Image<TPixel> source, TPixel color, float radius, Rectangle rectangle, GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel>
         {
-            GlowProcessor<TPixel> processor = new GlowProcessor<TPixel>(color, options) { Radius = radius, };
+            var processor = new GlowProcessor<TPixel>(color, options) { Radius = radius, };
             source.ApplyProcessor(processor, rectangle);
             return source;
         }
diff --git a/src/ImageSharp/Processing/Overlays/Vignette.cs b/src/ImageSharp/Processing/Overlays/Vignette.cs
index 2eaf2e1efa..c04e887182 100644
--- a/src/ImageSharp/Processing/Overlays/Vignette.cs
+++ b/src/ImageSharp/Processing/Overlays/Vignette.cs
@@ -5,8 +5,6 @@
 
 namespace ImageSharp
 {
-    using System;
-
     using ImageSharp.PixelFormats;
 
     using Processing.Processors;
@@ -162,7 +160,7 @@ namespace ImageSharp
         public static Image<TPixel> Vignette<TPixel>(this Image<TPixel> source, TPixel color, float radiusX, float radiusY, Rectangle rectangle, GraphicsOptions options)
             where TPixel : struct, IPixel<TPixel>
         {
-            VignetteProcessor<TPixel> processor = new VignetteProcessor<TPixel>(color, options) { RadiusX = radiusX, RadiusY = radiusY };
+            var processor = new VignetteProcessor<TPixel>(color, options) { RadiusX = radiusX, RadiusY = radiusY };
             source.ApplyProcessor(processor, rectangle);
             return source;
         }
diff --git a/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs b/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs
new file mode 100644
index 0000000000..0a94659bb6
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Overlays/GlowTest.cs
@@ -0,0 +1,70 @@
+// <copyright file="GlowTest.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp.Tests.Processing.Overlays
+{
+    using ImageSharp.PixelFormats;
+
+    using Xunit;
+
+    public class GlowTest : FileTestBase
+    {
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyGlowFilter<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Glow()
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyGlowFilterColor<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Glow(NamedColors<TPixel>.Orange)
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyGlowFilterRadius<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Glow(image.Width / 4F)
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyGlowFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> source = provider.GetImage())
+            using (var image = new Image<TPixel>(source))
+            {
+                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+
+                image.Glow(bounds)
+                    .DebugSave(provider, null, Extensions.Bmp);
+
+                // Draw identical shapes over the bounded and compare to ensure changes are constrained.
+                image.Fill(NamedColors<TPixel>.HotPink, bounds);
+                source.Fill(NamedColors<TPixel>.HotPink, bounds);
+                ImageComparer.CheckSimilarity(image, source);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs b/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs
new file mode 100644
index 0000000000..7a566a1b35
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Overlays/VignetteTest.cs
@@ -0,0 +1,70 @@
+// <copyright file="VignetteTest.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp.Tests.Processing.Overlays
+{
+    using ImageSharp.PixelFormats;
+
+    using Xunit;
+
+    public class VignetteTest : FileTestBase
+    {
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyVignetteFilter<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Vignette()
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyVignetteFilterColor<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Vignette(NamedColors<TPixel>.Orange)
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyVignetteFilterRadius<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.Vignette(image.Width / 4F, image.Height / 4F)
+                    .DebugSave(provider, null, Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(DefaultFiles), StandardPixelType)]
+        public void ImageShouldApplyVignetteFilterInBox<TPixel>(TestImageProvider<TPixel> provider)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> source = provider.GetImage())
+            using (var image = new Image<TPixel>(source))
+            {
+                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+
+                image.Vignette(bounds)
+                    .DebugSave(provider, null, Extensions.Bmp);
+
+                // Draw identical shapes over the bounded and compare to ensure changes are constrained.
+                image.Fill(NamedColors<TPixel>.HotPink, bounds);
+                source.Fill(NamedColors<TPixel>.HotPink, bounds);
+                ImageComparer.CheckSimilarity(image, source);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processors/Filters/GlowTest.cs b/tests/ImageSharp.Tests/Processors/Filters/GlowTest.cs
deleted file mode 100644
index 43e45f9ca7..0000000000
--- a/tests/ImageSharp.Tests/Processors/Filters/GlowTest.cs
+++ /dev/null
@@ -1,80 +0,0 @@
-// <copyright file="GlowTest.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-
-namespace ImageSharp.Tests
-{
-    using System.IO;
-
-    using ImageSharp.PixelFormats;
-
-    using Xunit;
-
-    public class GlowTest : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldApplyGlowFilter()
-        {
-            string path = this.CreateOutputDirectory("Glow");
-
-            foreach (TestFile file in Files)
-            {
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{file.FileName}"))
-                {
-                    image.Glow().Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyGlowFilterColor()
-        {
-            string path = this.CreateOutputDirectory("Glow");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("Color");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Glow(Rgba32.HotPink).Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyGlowFilterRadius()
-        {
-            string path = this.CreateOutputDirectory("Glow");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("Radius");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Glow(image.Width / 4F).Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyGlowFilterInBox()
-        {
-            string path = this.CreateOutputDirectory("Glow");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("InBox");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Glow(new Rectangle(image.Width / 8, image.Height / 8, image.Width / 2, image.Height / 2))
-                        .Save(output);
-                }
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/ImageSharp.Tests/Processors/Filters/VignetteTest.cs b/tests/ImageSharp.Tests/Processors/Filters/VignetteTest.cs
deleted file mode 100644
index 4191ae8fa0..0000000000
--- a/tests/ImageSharp.Tests/Processors/Filters/VignetteTest.cs
+++ /dev/null
@@ -1,80 +0,0 @@
-// <copyright file="VignetteTest.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-
-namespace ImageSharp.Tests
-{
-    using System.IO;
-
-    using ImageSharp.PixelFormats;
-
-    using Xunit;
-
-    public class VignetteTest : FileTestBase
-    {
-        [Fact]
-        public void ImageShouldApplyVignetteFilter()
-        {
-            string path = this.CreateOutputDirectory("Vignette");
-
-            foreach (TestFile file in Files)
-            {
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{file.FileName}"))
-                {
-                    image.Vignette().Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyVignetteFilterColor()
-        {
-            string path = this.CreateOutputDirectory("Vignette");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("Color");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Vignette(Rgba32.HotPink).Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyVignetteFilterRadius()
-        {
-            string path = this.CreateOutputDirectory("Vignette");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("Radius");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Vignette(image.Width / 4F, image.Height / 4F).Save(output);
-                }
-            }
-        }
-
-        [Fact]
-        public void ImageShouldApplyVignetteFilterInBox()
-        {
-            string path = this.CreateOutputDirectory("Vignette");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName("InBox");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.Vignette(new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2))
-                        .Save(output);
-                }
-            }
-        }
-    }
-}
\ No newline at end of file