diff --git a/Emby.Naming/AudioBook/AudioBookFilePathParser.cs b/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
index 3c874c62ca..eb9393b0bd 100644
--- a/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
+++ b/Emby.Naming/AudioBook/AudioBookFilePathParser.cs
@@ -50,27 +50,14 @@ namespace Emby.Naming.AudioBook
                         {
                             if (int.TryParse(value.Value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var intValue))
                             {
-                                result.ChapterNumber = intValue;
+                                result.PartNumber = intValue;
                             }
                         }
                     }
                 }
             }
 
-            /*var matches = _iRegexProvider.GetRegex("\\d+", RegexOptions.IgnoreCase).Matches(fileName);
-            if (matches.Count > 0)
-            {
-                if (!result.ChapterNumber.HasValue)
-                {
-                    result.ChapterNumber = int.Parse(matches[0].Groups[0].Value);
-                }
-
-                if (matches.Count > 1)
-                {
-                    result.PartNumber = int.Parse(matches[matches.Count - 1].Groups[0].Value);
-                }
-            }*/
-            result.Success = result.PartNumber.HasValue || result.ChapterNumber.HasValue;
+            result.Success = result.ChapterNumber.HasValue || result.PartNumber.HasValue;
 
             return result;
         }
diff --git a/Emby.Naming/AudioBook/AudioBookResolver.cs b/Emby.Naming/AudioBook/AudioBookResolver.cs
index 5466b46379..ed53bd04fa 100644
--- a/Emby.Naming/AudioBook/AudioBookResolver.cs
+++ b/Emby.Naming/AudioBook/AudioBookResolver.cs
@@ -55,8 +55,8 @@ namespace Emby.Naming.AudioBook
             {
                 Path = path,
                 Container = container,
-                PartNumber = parsingResult.PartNumber,
                 ChapterNumber = parsingResult.ChapterNumber,
+                PartNumber = parsingResult.PartNumber,
                 IsDirectory = isDirectory
             };
         }
diff --git a/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookListResolverTests.cs b/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookListResolverTests.cs
new file mode 100644
index 0000000000..541bb321cd
--- /dev/null
+++ b/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookListResolverTests.cs
@@ -0,0 +1,90 @@
+using System.Linq;
+using Emby.Naming.AudioBook;
+using Emby.Naming.Common;
+using MediaBrowser.Model.IO;
+using Xunit;
+
+namespace Jellyfin.Naming.Tests.AudioBook
+{
+    public class AudioBookListResolverTests
+    {
+        private readonly NamingOptions _namingOptions = new NamingOptions();
+
+        [Fact]
+        public void TestStackAndExtras()
+        {
+            // No stacking here because there is no part/disc/etc
+            var files = new[]
+            {
+                "Harry Potter and the Deathly Hallows/Part 1.mp3",
+                "Harry Potter and the Deathly Hallows/Part 2.mp3",
+                "Harry Potter and the Deathly Hallows/book.nfo",
+
+                "Batman/Chapter 1.mp3",
+                "Batman/Chapter 2.mp3",
+                "Batman/Chapter 3.mp3",
+            };
+
+            var resolver = GetResolver();
+
+            var result = resolver.Resolve(files.Select(i => new FileSystemMetadata
+            {
+                IsDirectory = false,
+                FullName = i
+            }).ToList()).ToList();
+
+            Assert.Equal(2, result[0].Files.ToList().Count);
+            // Assert.Empty(result[0].Extras); FIXME: AudioBookListResolver should resolve extra files properly
+            Assert.Equal("Harry Potter and the Deathly Hallows", result[0].Name);
+
+            Assert.Equal(3, result[1].Files.ToList().Count);
+            Assert.Empty(result[1].Extras);
+            Assert.Equal("Batman", result[1].Name);
+        }
+
+        [Fact]
+        public void TestWithMetadata()
+        {
+            var files = new[]
+            {
+                "Harry Potter and the Deathly Hallows/Chapter 1.ogg",
+                "Harry Potter and the Deathly Hallows/Harry Potter and the Deathly Hallows.nfo"
+            };
+
+            var resolver = GetResolver();
+
+            var result = resolver.Resolve(files.Select(i => new FileSystemMetadata
+            {
+                IsDirectory = false,
+                FullName = i
+            }).ToList()).ToList();
+
+            Assert.Single(result);
+        }
+
+        [Fact]
+        public void TestWithExtra()
+        {
+            var files = new[]
+            {
+                "Harry Potter and the Deathly Hallows/Chapter 1.mp3",
+                "Harry Potter and the Deathly Hallows/Harry Potter and the Deathly Hallows trailer.mp3"
+            };
+
+            var resolver = GetResolver();
+
+            var result = resolver.Resolve(files.Select(i => new FileSystemMetadata
+            {
+                IsDirectory = false,
+                FullName = i
+            }).ToList()).ToList();
+
+            Assert.Single(result);
+        }
+
+        private AudioBookListResolver GetResolver()
+        {
+            return new AudioBookListResolver(_namingOptions);
+        }
+    }
+}
diff --git a/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookResolverTests.cs b/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookResolverTests.cs
new file mode 100644
index 0000000000..5da2e93d8d
--- /dev/null
+++ b/tests/Jellyfin.Naming.Tests/AudioBook/AudioBookResolverTests.cs
@@ -0,0 +1,58 @@
+using System.Collections.Generic;
+using Emby.Naming.AudioBook;
+using Emby.Naming.Common;
+using MediaBrowser.Model.Entities;
+using Xunit;
+
+namespace Jellyfin.Naming.Tests.AudioBook
+{
+    public class AudioBookResolverTests
+    {
+        private readonly NamingOptions _namingOptions = new NamingOptions();
+
+        public static IEnumerable<object[]> GetResolveFileTestData()
+        {
+            yield return new object[]
+            {
+                new AudioBookFileInfo()
+                {
+                    Path = @"/server/AudioBooks/Larry Potter/Larry Potter.mp3",
+                    Container = "mp3",
+                }
+            };
+            yield return new object[]
+            {
+                new AudioBookFileInfo()
+                {
+                    Path = @"/server/AudioBooks/Berry Potter/Chapter 1 .ogg",
+                    Container = "ogg",
+                    ChapterNumber = 1
+                }
+            };
+            yield return new object[]
+            {
+                new AudioBookFileInfo()
+                {
+                    Path = @"/server/AudioBooks/Nerry Potter/Part 3 - Chapter 2.mp3",
+                    Container = "mp3",
+                    ChapterNumber = 2,
+                    PartNumber = 3
+                }
+            };
+        }
+
+        [Theory]
+        [MemberData(nameof(GetResolveFileTestData))]
+        public void ResolveFile_ValidFileName_Success(AudioBookFileInfo expectedResult)
+        {
+            var result = new AudioBookResolver(_namingOptions).Resolve(expectedResult.Path);
+
+            Assert.NotNull(result);
+            Assert.Equal(result?.Path, expectedResult.Path);
+            Assert.Equal(result?.Container, expectedResult.Container);
+            Assert.Equal(result?.ChapterNumber, expectedResult.ChapterNumber);
+            Assert.Equal(result?.PartNumber, expectedResult.PartNumber);
+            Assert.Equal(result?.IsDirectory, expectedResult.IsDirectory);
+        }
+    }
+}