diff --git a/tests/ImageSharp.Tests/Helpers/GuardTests.cs b/tests/ImageSharp.Tests/Helpers/GuardTests.cs
deleted file mode 100644
index 6bccea2c3..000000000
--- a/tests/ImageSharp.Tests/Helpers/GuardTests.cs
+++ /dev/null
@@ -1,274 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.Diagnostics.CodeAnalysis;
-
-using Xunit;
-// ReSharper disable InconsistentNaming
-
-namespace SixLabors.ImageSharp.Tests.Helpers
-{
-    /// <summary>
-    /// Tests the <see cref="Guard"/> helper.
-    /// </summary>
-    public class GuardTests
-    {
-        class Test
-        {
-        }
-
-        [Theory]
-        [InlineData(0, 0)]
-        [InlineData(0, 1)]
-        [InlineData(0, 42)]
-        [InlineData(1, 1)]
-        [InlineData(10, 42)]
-        [InlineData(42, 42)]
-        public void DestinationShouldNotBeTooShort_WhenOk(int sourceLength, int destLength)
-        {
-            ReadOnlySpan<int> source = new int[sourceLength];
-            Span<float> dest = new float[destLength];
-
-            Guard.DestinationShouldNotBeTooShort(source, dest, nameof(dest));
-        }
-
-        [Theory]
-        [InlineData(1, 0)]
-        [InlineData(42, 41)]
-        public void DestinationShouldNotBeTooShort_WhenThrows(int sourceLength, int destLength)
-        {
-            Assert.ThrowsAny<ArgumentException>(
-                () =>
-                    {
-                        ReadOnlySpan<int> source = new int[sourceLength];
-                        Span<float> dest = new float[destLength];
-                        Guard.DestinationShouldNotBeTooShort(source, dest, nameof(dest));
-                    });
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.NotNull"/> method throws when the argument is null.
-        /// </summary>
-        [Fact]
-        public void NotNullThrowsWhenArgIsNull()
-        {
-            Assert.Throws<ArgumentNullException>(() => Guard.NotNull((Test)null, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.NotNull"/> method throws when the argument name is empty.
-        /// </summary>
-        [Fact]
-        public void NotNullThrowsWhenArgNameEmpty()
-        {
-            Assert.Throws<ArgumentNullException>(() => Guard.NotNull((Test)null, string.Empty));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.NotEmpty"/> method throws when the argument is empty.
-        /// </summary>
-        [Fact]
-        [SuppressMessage("StyleCop.CSharp.ReadabilityRules", "SA1122:UseStringEmptyForEmptyStrings", Justification = "Reviewed. Suppression is OK here.")]
-        public void NotEmptyOrWhiteSpaceThrowsWhenEmpty()
-        {
-            Assert.Throws<ArgumentException>(() => Guard.NotNullOrWhiteSpace("", string.Empty));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.NotEmpty"/> method throws when the argument is whitespace.
-        /// </summary>
-        [Fact]
-        public void NotEmptyOrWhiteSpaceThrowsOnWhitespace()
-        {
-            Assert.Throws<ArgumentException>(() => Guard.NotNullOrWhiteSpace(" ", string.Empty));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.NotEmpty"/> method throws when the argument name is null.
-        /// </summary>
-        [Fact]
-        public void NotEmptyOrWhiteSpaceThrowsWhenParameterNameNull()
-        {
-            Assert.Throws<ArgumentNullException>(() => Guard.NotNullOrWhiteSpace(null, null));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThan"/> method throws when the argument is greater.
-        /// </summary>
-        [Fact]
-        public void LessThanThrowsWhenArgIsGreater()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeLessThan(1, 0, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThan"/> method throws when the argument is equal.
-        /// </summary>
-        [Fact]
-        public void LessThanThrowsWhenArgIsEqual()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeLessThan(1, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThanOrEqual"/> method throws when the argument is greater.
-        /// </summary>
-        [Fact]
-        public void LessThanOrEqualToThrowsWhenArgIsGreater()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeLessThanOrEqualTo(1, 0, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThanOrEqual"/> method does not throw when the argument 
-        /// is less.
-        /// </summary>
-        [Fact]
-        public void LessThanOrEqualToDoesNotThrowWhenArgIsLess()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeLessThanOrEqualTo(0, 1, "foo"));
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThanOrEqual"/> method does not throw when the argument 
-        /// is equal.
-        /// </summary>
-        [Fact]
-        public void LessThanOrEqualToDoesNotThrowWhenArgIsEqual()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeLessThanOrEqualTo(1, 1, "foo"));
-            Assert.Equal(1, 1);
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThan"/> method throws when the argument is greater.
-        /// </summary>
-        [Fact]
-        public void GreaterThanThrowsWhenArgIsLess()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeGreaterThan(0, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThan"/> method throws when the argument is greater.
-        /// </summary>
-        [Fact]
-        public void GreaterThanThrowsWhenArgIsEqual()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeGreaterThan(1, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThan"/> method throws when the argument name is greater.
-        /// </summary>
-        [Fact]
-        public void GreaterThanOrEqualToThrowsWhenArgIsLess()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeGreaterThanOrEqualTo(0, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThanOrEqual"/> method does not throw when the argument 
-        /// is less.
-        /// </summary>
-        [Fact]
-        public void GreaterThanOrEqualToDoesNotThrowWhenArgIsGreater()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeGreaterThanOrEqualTo(1, 0, "foo"));
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeLessThanOrEqual"/> method does not throw when the argument 
-        /// is equal.
-        /// </summary>
-        [Fact]
-        public void GreaterThanOrEqualToDoesNotThrowWhenArgIsEqual()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeGreaterThanOrEqualTo(1, 1, "foo"));
-            Assert.Equal(1, 1);
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeBetweenOrEqualTo"/> method throws when the argument is less.
-        /// </summary>
-        [Fact]
-        public void BetweenOrEqualToThrowsWhenArgIsLess()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeBetweenOrEqualTo(-2, -1, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeBetweenOrEqualTo"/> method throws when the argument is greater.
-        /// </summary>
-        [Fact]
-        public void BetweenOrEqualToThrowsWhenArgIsGreater()
-        {
-            Assert.Throws<ArgumentOutOfRangeException>(() => Guard.MustBeBetweenOrEqualTo(2, -1, 1, "foo"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeBetweenOrEqualTo"/> method does not throw when the argument 
-        /// is equal.
-        /// </summary>
-        [Fact]
-        public void BetweenOrEqualToDoesNotThrowWhenArgIsEqual()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeBetweenOrEqualTo(1, 1, 1, "foo"));
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.MustBeBetweenOrEqualTo"/> method does not throw when the argument 
-        /// is equal.
-        /// </summary>
-        [Fact]
-        public void BetweenOrEqualToDoesNotThrowWhenArgIsBetween()
-        {
-            Exception ex = Record.Exception(() => Guard.MustBeBetweenOrEqualTo(0, -1, 1, "foo"));
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.IsTrue"/> method throws when the argument is false.
-        /// </summary>
-        [Fact]
-        public void IsTrueThrowsWhenArgIsFalse()
-        {
-            Assert.Throws<ArgumentException>(() => Guard.IsTrue(false, "foo", "message"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.IsTrue"/> method does not throw when the argument is true.
-        /// </summary>
-        [Fact]
-        public void IsTrueDoesThrowsWhenArgIsTrue()
-        {
-            Exception ex = Record.Exception(() => Guard.IsTrue(true, "foo", "message"));
-            Assert.Null(ex);
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.IsFalse"/> method throws when the argument is true.
-        /// </summary>
-        [Fact]
-        public void IsFalseThrowsWhenArgIsFalse()
-        {
-            Assert.Throws<ArgumentException>(() => Guard.IsFalse(true, "foo", "message"));
-        }
-
-        /// <summary>
-        /// Tests that the <see cref="M:Guard.IsFalse"/> method does not throw when the argument is false.
-        /// </summary>
-        [Fact]
-        public void IsFalseDoesThrowsWhenArgIsTrue()
-        {
-            Exception ex = Record.Exception(() => Guard.IsFalse(false, "foo", "message"));
-            Assert.Null(ex);
-        }
-    }
-}
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