Better test image for near lossless

tests/ImageSharp.Tests/Formats/Tiff/TiffMetadataTests.cs

@@ -17,6 +17,7 @@ using static SixLabors.ImageSharp.Tests.TestImages.Tiff;
 
 namespace SixLabors.ImageSharp.Tests.Formats.Tiff
 {
+    [Collection("RunSerial")]
     [Trait("Format", "Tiff")]
     public class TiffMetadataTests
     {

tests/ImageSharp.Tests/Formats/WebP/WebpEncoderTests.cs

@@ -81,11 +81,11 @@ namespace SixLabors.ImageSharp.Tests.Formats.Webp
         }
 
         [Theory]
-        [WithFile(RgbTestPattern, PixelTypes.Rgba32, 85)]
+        [WithFile(RgbTestPattern100x100, PixelTypes.Rgba32, 85)]
-        [WithFile(RgbTestPattern, PixelTypes.Rgba32, 60)]
+        [WithFile(RgbTestPattern100x100, PixelTypes.Rgba32, 60)]
-        [WithFile(RgbTestPattern, PixelTypes.Rgba32, 40)]
+        [WithFile(RgbTestPattern100x100, PixelTypes.Rgba32, 40)]
-        [WithFile(RgbTestPattern, PixelTypes.Rgba32, 20)]
+        [WithFile(RgbTestPattern100x100, PixelTypes.Rgba32, 20)]
-        [WithFile(RgbTestPattern, PixelTypes.Rgba32, 10)]
+        [WithFile(RgbTestPattern100x100, PixelTypes.Rgba32, 10)]
         [WithFile(RgbTestPattern63x63, PixelTypes.Rgba32, 40)]
         public void Encode_Lossless_WithNearLosslessFlag_Works<TPixel>(TestImageProvider<TPixel> provider, int nearLosslessQuality)
             where TPixel : unmanaged, IPixel<TPixel>

tests/ImageSharp.Tests/TestImages.cs

@@ -508,7 +508,7 @@ namespace SixLabors.ImageSharp.Tests
             // Test pattern images for testing the encoder.
             public const string TestPatternOpaque = "WebP/testpattern_opaque.png";
             public const string TestPatternOpaqueSmall = "WebP/testpattern_opaque_small.png";
-            public const string RgbTestPattern = "WebP/rgb_pattern.png";
+            public const string RgbTestPattern100x100 = "WebP/rgb_pattern_100x100.png";
             public const string RgbTestPattern63x63 = "WebP/rgb_pattern_63x63.png";
 
             // Test image for encoding image with a palette.

tests/Images/Input/WebP/rgb_pattern.png

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5150fccc821b2196678771d46567e01af4702c53e4031aee24e2611cecfdf48e
-size 12841

tests/Images/Input/WebP/rgb_pattern_100x100.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:12f39b990367eb09ffbe69eb11bf970b5386e75a02a820e4740e66a079dda527
+size 30225