diff --git a/src/NzbDrone.Core.Test/MediaFiles/ImportScriptServiceFixture.cs b/src/NzbDrone.Core.Test/MediaFiles/ImportScriptServiceFixture.cs
new file mode 100644
index 000000000..d769d1396
--- /dev/null
+++ b/src/NzbDrone.Core.Test/MediaFiles/ImportScriptServiceFixture.cs
@@ -0,0 +1,424 @@
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Linq;
+using FizzWare.NBuilder;
+using FluentAssertions;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.Processes;
+using NzbDrone.Core.Configuration;
+using NzbDrone.Core.CustomFormats;
+using NzbDrone.Core.Download;
+using NzbDrone.Core.MediaFiles;
+using NzbDrone.Core.Music;
+using NzbDrone.Core.Parser.Model;
+using NzbDrone.Core.Qualities;
+using NzbDrone.Core.Tags;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.MediaFiles
+{
+    [TestFixture]
+    public class ImportScriptServiceFixture : CoreTest<ImportScriptService>
+    {
+        private LocalTrack _localTrack;
+        private TrackFile _trackFile;
+        private Artist _artist;
+        private Album _album;
+        private List<Track> _tracks;
+        private Tag _tag;
+
+        [SetUp]
+        public void Setup()
+        {
+            _tag = Builder<Tag>.CreateNew()
+                .With(t => t.Id = 1)
+                .With(t => t.Label = "TestTag")
+                .Build();
+
+            _artist = Builder<Artist>.CreateNew()
+                .With(a => a.Id = 1)
+                .With(a => a.Name = "Test Artist")
+                .With(a => a.Path = "/music/Test Artist")
+                .With(a => a.ForeignArtistId = "test-artist-mbid")
+                .With(a => a.Tags = new HashSet<int> { 1 })
+                .Build();
+
+            _album = Builder<Album>.CreateNew()
+                .With(a => a.Id = 1)
+                .With(a => a.Title = "Test Album")
+                .With(a => a.ForeignAlbumId = "test-album-mbid")
+                .With(a => a.ReleaseDate = new System.DateTime(2023, 1, 1))
+                .With(a => a.Genres = new List<string> { "Rock", "Alternative" })
+                .Build();
+
+            _tracks = new List<Track>
+            {
+                Builder<Track>.CreateNew()
+                    .With(t => t.Id = 1)
+                    .With(t => t.TrackNumber = "1")
+                    .With(t => t.Title = "Test Track 1")
+                    .Build(),
+                Builder<Track>.CreateNew()
+                    .With(t => t.Id = 2)
+                    .With(t => t.TrackNumber = "2")
+                    .With(t => t.Title = "Test Track 2")
+                    .Build()
+            };
+
+            var mediaInfo = Builder<MediaInfoModel>.CreateNew()
+                .With(m => m.AudioChannels = 2)
+                .With(m => m.AudioFormat = "FLAC")
+                .With(m => m.AudioBitrate = 1000)
+                .With(m => m.AudioSampleRate = 44100)
+                .With(m => m.AudioBits = 16)
+                .Build();
+
+            var fileTrackInfo = Builder<ParsedTrackInfo>.CreateNew()
+                .With(p => p.MediaInfo = mediaInfo)
+                .Build();
+
+            _localTrack = Builder<LocalTrack>.CreateNew()
+                .With(l => l.Artist = _artist)
+                .With(l => l.Album = _album)
+                .With(l => l.Tracks = _tracks)
+                .With(l => l.Quality = new QualityModel(Quality.FLAC))
+                .With(l => l.ReleaseGroup = "TestGroup")
+                .With(l => l.SceneName = "Test.Scene.Name")
+                .With(l => l.FileTrackInfo = fileTrackInfo)
+                .Build();
+
+            _trackFile = Builder<TrackFile>.CreateNew()
+                .With(t => t.Path = "/destination/path/track.flac")
+                .Build();
+
+            Mocker.GetMock<IConfigService>()
+                .Setup(s => s.UseScriptImport)
+                .Returns(true);
+
+            Mocker.GetMock<IConfigService>()
+                .Setup(s => s.ScriptImportPath)
+                .Returns("/usr/local/bin/import_script.sh");
+
+            Mocker.GetMock<IConfigService>()
+                .Setup(s => s.ApplicationUrl)
+                .Returns("http://localhost:8686");
+
+            Mocker.GetMock<IConfigFileProvider>()
+                .Setup(s => s.InstanceName)
+                .Returns("Lidarr");
+
+            Mocker.GetMock<ITagRepository>()
+                .Setup(s => s.Get(1))
+                .Returns(_tag);
+
+            var customFormats = Builder<CustomFormat>.CreateListOfSize(2)
+                .TheFirst(1)
+                .With(f => f.Name = "Lossless")
+                .TheNext(1)
+                .With(f => f.Name = "Scene")
+                .Build().ToList();
+
+            Mocker.GetMock<ICustomFormatCalculationService>()
+                .Setup(s => s.ParseCustomFormat(_localTrack))
+                .Returns(customFormats);
+        }
+
+        [Test]
+        public void should_return_defer_when_script_import_disabled()
+        {
+            // Given
+            Mocker.GetMock<IConfigService>()
+                .Setup(s => s.UseScriptImport)
+                .Returns(false);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            result.Should().Be(ScriptImportDecision.DeferMove);
+            Mocker.GetMock<IProcessProvider>()
+                .Verify(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()), Times.Never);
+        }
+
+        [Test]
+        public void should_call_script_with_correct_arguments()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 0,
+                Lines = new List<ProcessOutputLine> { new ProcessOutputLine(ProcessOutputLevel.Standard, "Script executed successfully") }
+            };
+
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Returns(processOutput);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            Mocker.GetMock<IProcessProvider>()
+                .Verify(p => p.StartAndCapture(
+                    "/usr/local/bin/import_script.sh",
+                    "\"/source/path\" \"/dest/path\"",
+                    It.IsAny<StringDictionary>()),
+                Times.Once);
+
+            result.Should().Be(ScriptImportDecision.MoveComplete);
+        }
+
+        [Test]
+        public void should_pass_correct_environment_variables()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 3,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            StringDictionary capturedEnv = null;
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Callback<string, string, StringDictionary>((script, args, env) => capturedEnv = env)
+                .Returns(processOutput);
+
+            // When
+            Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Copy);
+
+            // Then
+            capturedEnv.Should().NotBeNull();
+
+            // Basic paths and instance info
+            capturedEnv["Lidarr_SourcePath"].Should().Be("/source/path");
+            capturedEnv["Lidarr_DestinationPath"].Should().Be("/dest/path");
+            capturedEnv["Lidarr_InstanceName"].Should().Be("Lidarr");
+            capturedEnv["Lidarr_ApplicationUrl"].Should().Be("http://localhost:8686");
+            capturedEnv["Lidarr_TransferMode"].Should().Be("Copy");
+
+            // Artist info
+            capturedEnv["Lidarr_Artist_Id"].Should().Be("1");
+            capturedEnv["Lidarr_Artist_Name"].Should().Be("Test Artist");
+            capturedEnv["Lidarr_Artist_Path"].Should().Be("/music/Test Artist");
+            capturedEnv["Lidarr_Artist_MBId"].Should().Be("test-artist-mbid");
+            capturedEnv["Lidarr_Artist_Tags"].Should().Be("TestTag");
+
+            // Album info
+            capturedEnv["Lidarr_Album_Id"].Should().Be("1");
+            capturedEnv["Lidarr_Album_Title"].Should().Be("Test Album");
+            capturedEnv["Lidarr_Album_MBId"].Should().Be("test-album-mbid");
+            capturedEnv["Lidarr_Album_ReleaseDate"].Should().Be("2023-01-01");
+            capturedEnv["Lidarr_Album_Genres"].Should().Be("Rock|Alternative");
+
+            // Track info
+            capturedEnv["Lidarr_TrackFile_TrackCount"].Should().Be("2");
+            capturedEnv["Lidarr_TrackFile_TrackIds"].Should().Be("1,2");
+            capturedEnv["Lidarr_TrackFile_TrackNumbers"].Should().Be("1,2");
+            capturedEnv["Lidarr_TrackFile_TrackTitles"].Should().Be("Test Track 1|Test Track 2");
+            capturedEnv["Lidarr_TrackFile_Quality"].Should().Be("FLAC");
+            capturedEnv["Lidarr_TrackFile_ReleaseGroup"].Should().Be("TestGroup");
+            capturedEnv["Lidarr_TrackFile_SceneName"].Should().Be("Test.Scene.Name");
+
+            // Media info
+            capturedEnv["Lidarr_TrackFile_MediaInfo_AudioChannels"].Should().Be("2");
+            capturedEnv["Lidarr_TrackFile_MediaInfo_AudioCodec"].Should().Be("FLAC");
+            capturedEnv["Lidarr_TrackFile_MediaInfo_AudioBitRate"].Should().Be("1000");
+            capturedEnv["Lidarr_TrackFile_MediaInfo_AudioSampleRate"].Should().Be("44100");
+            capturedEnv["Lidarr_TrackFile_MediaInfo_BitsPerSample"].Should().Be("16");
+
+            // Custom formats
+            capturedEnv["Lidarr_TrackFile_CustomFormat"].Should().Be("Lossless|Scene");
+
+            // Download client info (should be empty when not provided)
+            capturedEnv["Lidarr_Download_Client"].Should().Be("");
+            capturedEnv["Lidarr_Download_Client_Type"].Should().Be("");
+            capturedEnv["Lidarr_Download_Id"].Should().Be("");
+        }
+
+        [Test]
+        public void should_include_download_client_info_when_provided()
+        {
+            // Given
+            var downloadClientInfo = Builder<DownloadClientItemClientInfo>.CreateNew()
+                .With(d => d.Name = "qBittorrent")
+                .With(d => d.Type = "Torrent")
+                .Build();
+
+            var downloadClientItem = Builder<DownloadClientItem>.CreateNew()
+                .With(d => d.DownloadClientInfo = downloadClientInfo)
+                .With(d => d.DownloadId = "test-download-id")
+                .Build();
+
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 3,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            StringDictionary capturedEnv = null;
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Callback<string, string, StringDictionary>((script, args, env) => capturedEnv = env)
+                .Returns(processOutput);
+
+            // When
+            Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move, downloadClientItem);
+
+            // Then
+            capturedEnv["Lidarr_Download_Client"].Should().Be("qBittorrent");
+            capturedEnv["Lidarr_Download_Client_Type"].Should().Be("Torrent");
+            capturedEnv["Lidarr_Download_Id"].Should().Be("test-download-id");
+        }
+
+        [Test]
+        public void should_return_move_complete_when_script_returns_0()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 0,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Returns(processOutput);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            result.Should().Be(ScriptImportDecision.MoveComplete);
+        }
+
+        [Test]
+        public void should_return_rename_requested_when_script_returns_2()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 2,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            var audioTag = Builder<AudioTag>.CreateNew()
+                .With(a => a.MediaInfo = new MediaInfoModel())
+                .Build();
+
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Returns(processOutput);
+
+            Mocker.GetMock<IAudioTagService>()
+                .Setup(s => s.ReadTags("/dest/path"))
+                .Returns(audioTag);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            result.Should().Be(ScriptImportDecision.RenameRequested);
+            _trackFile.MediaInfo.Should().Be(audioTag.MediaInfo);
+            _trackFile.Path.Should().BeNull();
+
+            Mocker.GetMock<IAudioTagService>()
+                .Verify(s => s.ReadTags("/dest/path"), Times.Once);
+        }
+
+        [Test]
+        public void should_return_defer_move_when_script_returns_3()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 3,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Returns(processOutput);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            result.Should().Be(ScriptImportDecision.DeferMove);
+        }
+
+        [Test]
+        public void should_throw_exception_when_script_returns_error_code()
+        {
+            // Given
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 1,
+                Lines = new List<ProcessOutputLine> { new ProcessOutputLine(ProcessOutputLevel.Error, "Error message from script") }
+            };
+
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Returns(processOutput);
+
+            // When & Then
+            Assert.Throws<ScriptImportException>(() =>
+                Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move));
+        }
+
+        [Test]
+        public void should_handle_missing_media_info_gracefully()
+        {
+            // Given
+            _localTrack.FileTrackInfo.MediaInfo = null;
+
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 3,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            StringDictionary capturedEnv = null;
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Callback<string, string, StringDictionary>((script, args, env) => capturedEnv = env)
+                .Returns(processOutput);
+
+            // When
+            Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            capturedEnv.Should().NotBeNull();
+            capturedEnv.ContainsKey("Lidarr_TrackFile_MediaInfo_AudioChannels").Should().BeFalse();
+            capturedEnv.ContainsKey("Lidarr_TrackFile_MediaInfo_AudioCodec").Should().BeFalse();
+        }
+
+        [Test]
+        public void should_handle_missing_file_track_info_gracefully()
+        {
+            // Given
+            _localTrack.FileTrackInfo = null;
+
+            var processOutput = new ProcessOutput
+            {
+                ExitCode = 3,
+                Lines = new List<ProcessOutputLine>()
+            };
+
+            StringDictionary capturedEnv = null;
+            Mocker.GetMock<IProcessProvider>()
+                .Setup(p => p.StartAndCapture(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<StringDictionary>()))
+                .Callback<string, string, StringDictionary>((script, args, env) => capturedEnv = env)
+                .Returns(processOutput);
+
+            // When
+            var result = Subject.TryImport("/source/path", "/dest/path", _localTrack, _trackFile, TransferMode.Move);
+
+            // Then
+            result.Should().Be(ScriptImportDecision.DeferMove);
+            capturedEnv.ContainsKey("Lidarr_TrackFile_MediaInfo_AudioChannels").Should().BeFalse();
+        }
+    }
+}