diff --git a/tests/Jellyfin.Server.Implementations.Tests/Sorting/AiredEpisodeOrderComparerTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Sorting/AiredEpisodeOrderComparerTests.cs
new file mode 100644
index 0000000000..d9b206f663
--- /dev/null
+++ b/tests/Jellyfin.Server.Implementations.Tests/Sorting/AiredEpisodeOrderComparerTests.cs
@@ -0,0 +1,180 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using Emby.Server.Implementations.Sorting;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Entities.Movies;
+using MediaBrowser.Controller.Entities.TV;
+using Xunit;
+
+namespace Jellyfin.Server.Implementations.Tests.Sorting
+{
+    public class AiredEpisodeOrderComparerTests
+    {
+        [Theory]
+        [ClassData(typeof(EpisodeBadData))]
+        public void Compare_GivenNull_ThrowsArgumentNullException(BaseItem x, BaseItem y)
+        {
+            var cmp = new AiredEpisodeOrderComparer();
+            Assert.Throws<ArgumentNullException>(() => cmp.Compare(x, y));
+        }
+
+        [Theory]
+        [ClassData(typeof(EpisodeTestData))]
+        public void AiredEpisodeOrderCompareTest(BaseItem x, BaseItem y, int expected)
+        {
+            var cmp = new AiredEpisodeOrderComparer();
+
+            Assert.Equal(expected, cmp.Compare(x, y));
+            Assert.Equal(-expected, cmp.Compare(y, x));
+        }
+
+        private class EpisodeBadData : IEnumerable<object?[]>
+        {
+            public IEnumerator<object?[]> GetEnumerator()
+            {
+                yield return new object?[] { null, new Episode() };
+                yield return new object?[] { new Episode(), null };
+            }
+
+            IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+        }
+
+        private class EpisodeTestData : IEnumerable<object?[]>
+        {
+            public IEnumerator<object?[]> GetEnumerator()
+            {
+                yield return new object?[]
+                {
+                    new Movie(),
+                    new Movie(),
+                    0
+                };
+                yield return new object?[]
+                {
+                    new Movie(),
+                    new Episode(),
+                    1
+                };
+                // Good cases
+                yield return new object?[]
+                {
+                    new Episode(),
+                    new Episode(),
+                    0
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    0
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 2 },
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 2, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    1
+                };
+                // Good Specials
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    0
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 2 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    1
+                };
+
+                // Specials to Episodes
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 2 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 2 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    1
+                };
+
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 2 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 2 },
+                    1
+                };
+
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsAfterSeasonNumber = 1 },
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 3, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsAfterSeasonNumber = 1 },
+                    1
+                };
+
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 3, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsAfterSeasonNumber = 1, AirsBeforeEpisodeNumber = 2 },
+                    1
+                };
+
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsBeforeSeasonNumber = 1 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 2 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsBeforeSeasonNumber = 1, AirsBeforeEpisodeNumber = 2 },
+                    1
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsBeforeSeasonNumber = 1, AirsBeforeEpisodeNumber = 2 },
+                    0
+                };
+                yield return new object?[]
+                {
+                    new Episode { ParentIndexNumber = 1, IndexNumber = 3 },
+                    new Episode { ParentIndexNumber = 0, IndexNumber = 1, AirsBeforeSeasonNumber = 1, AirsBeforeEpisodeNumber = 2 },
+                    1
+                };
+            }
+
+            IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+        }
+    }
+}