1 files changed, 7 insertions, 0 deletions
diff --git a/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs
index bd14ca008d..ba3127bc08 100644
--- a/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs
+++ b/tests/Jellyfin.Server.Implementations.Tests/Library/UserDataManagerTests.cs
@@ -206,4 +206,11 @@ public sealed class UserDataManagerTests : IDisposable
         Assert.Equal(222, result[fossilItem.Id].PlaybackPositionTicks);
         Assert.Equal(333, result[retiredItem.Id].PlaybackPositionTicks);
     }
+
+    [Fact]
+    public void GetUserData_NullUser_ThrowsArgumentNullException()
+    {
+        var item = CreateAudioBook();
+        Assert.Throws<ArgumentNullException>(() => _userDataManager.GetUserData(null!, item));
+    }
 }