diff --git a/tests/ImageSharp.Tests/Processing/Filters/LightnessTest.cs b/tests/ImageSharp.Tests/Processing/Filters/LightnessTest.cs
new file mode 100644
index 000000000..16f4fd379
--- /dev/null
+++ b/tests/ImageSharp.Tests/Processing/Filters/LightnessTest.cs
@@ -0,0 +1,30 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using SixLabors.ImageSharp.Processing;
+using SixLabors.ImageSharp.Processing.Processors.Filters;
+using Xunit;
+
+namespace SixLabors.ImageSharp.Tests.Processing.Effects
+{
+    public class LightnessTest : BaseImageOperationsExtensionTest
+    {
+        [Fact]
+        public void Lightness_amount_LightnessProcessorDefaultsSet()
+        {
+            this.operations.Lightness(1.5F);
+            LightnessProcessor processor = this.Verify<LightnessProcessor>();
+
+            Assert.Equal(.5F, processor.Lightness);
+        }
+
+        [Fact]
+        public void Lightness_amount_rect_LightnessProcessorDefaultsSet()
+        {
+            this.operations.Lightness(1.5F, this.rect);
+            LightnessProcessor processor = this.Verify<LightnessProcessor>(this.rect);
+
+            Assert.Equal(.5F, processor.Lightness);
+        }
+    }
+}