diff --git a/Backend.Tests.Spotify/SpotifyOperationsTests.cs b/Backend.Tests.Spotify/SpotifyOperationsTests.cs
index 78d4416..e59e84a 100644
--- a/Backend.Tests.Spotify/SpotifyOperationsTests.cs
+++ b/Backend.Tests.Spotify/SpotifyOperationsTests.cs
@@ -14,6 +14,7 @@ public class SpotifyOperationsTests : BaseTests
         public override void SetUp()
         {
             base.SetUp();
+            Assert.IsNotNull(ConnectionManager.Instance.GetSavedToken());
             ConnectionManager.Instance.TryInitFromSavedToken().Wait();
         }
 
diff --git a/Backend.Tests/SpotifyOperationsMockTests.cs b/Backend.Tests/SpotifyOperationsMockTests.cs
index ce4a9c2..d0869b0 100644
--- a/Backend.Tests/SpotifyOperationsMockTests.cs
+++ b/Backend.Tests/SpotifyOperationsMockTests.cs
@@ -11,6 +11,12 @@ namespace Backend.Tests
 {
     public class SpotifyOperationsMockTests : BaseTests
     {
+        [SetUp]
+        public override void SetUp()
+        {
+            REQUIRES_DB = true;
+            base.SetUp();
+        }
         [Test]
         public async Task GetPlaylistItems()
         {
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterAcousticnessNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterAcousticnessNode.cs
index 380f3e3..1f1f067 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterAcousticnessNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterAcousticnessNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterAcousticnessNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.AcousticnessPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.AcousticnessPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterDanceabilityNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterDanceabilityNode.cs
index 67d97d5..2834540 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterDanceabilityNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterDanceabilityNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterDanceabilityNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.DanceabilityPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.DanceabilityPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterEnergyNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterEnergyNode.cs
index 76ef2da..9a6ee9e 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterEnergyNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterEnergyNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterEnergyNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.EnergyPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.EnergyPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterInstrumentalnessNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterInstrumentalnessNode.cs
index 7072718..0d16603 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterInstrumentalnessNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterInstrumentalnessNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterInstrumentalnessNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.InstrumentalnessPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.InstrumentalnessPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLivenessNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLivenessNode.cs
index 45e8296..2f20920 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLivenessNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLivenessNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterLivenessNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.LivenessPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.LivenessPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLoudnessNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLoudnessNode.cs
index e0097e4..590cd8a 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLoudnessNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterLoudnessNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterLoudnessNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => (int)t.AudioFeatures.Loudness;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => (int)t.AudioFeatures?.Loudness;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterSpeechinessNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterSpeechinessNode.cs
index c3535b3..833b77e 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterSpeechinessNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterSpeechinessNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterSpeechinessNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.SpeechinessPercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.SpeechinessPercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterTempoNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterTempoNode.cs
index 9b392cf..7888255 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterTempoNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterTempoNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterTempoNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => (int)t.AudioFeatures.Tempo;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => (int)t.AudioFeatures?.Tempo;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterValenceNode.cs b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterValenceNode.cs
index d9fd7f4..95830de 100644
--- a/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterValenceNode.cs
+++ b/Backend/Entities/GraphNodes/AudioFeaturesFilters/FilterValenceNode.cs
@@ -8,7 +8,8 @@ namespace Backend.Entities.GraphNodes.AudioFeaturesFilters
 {
     public class FilterValenceNode : FilterRangeNode
     {
-        protected override int? GetValue(Track t) => t.AudioFeatures.ValencePercent;
+        // if db is pre-AudioFeatures even including AudioFeatures results in AudioFeature being null
+        protected override int? GetValue(Track t) => t.AudioFeatures?.ValencePercent;
         public override bool RequiresAudioFeatures => true;
     }
 }
diff --git a/Tests.Util/SpotifyClientMock.cs b/Tests.Util/SpotifyClientMock.cs
index 46319b0..6e2ff7a 100644
--- a/Tests.Util/SpotifyClientMock.cs
+++ b/Tests.Util/SpotifyClientMock.cs
@@ -331,17 +331,65 @@ public ISpotifyClient SetUp(
             trackMock.Setup(track => track.Get(It.IsAny<string>(), It.IsAny<TrackRequest>()))
                 .Returns((string trackId, TrackRequest req) => 
                 Task.FromResult(Tracks.FirstOrDefault(t => t.Id == trackId)));
+            trackMock.Setup(track => track.GetSeveralAudioFeatures(It.IsAny<TracksAudioFeaturesRequest>()))
+                .Returns((TracksAudioFeaturesRequest req) =>
+                {
+                    var response = new TracksAudioFeaturesResponse
+                    {
+                        // TODO this is not tested yet and is only here to avoid SyncLibrary failing
+                        AudioFeatures = req.Ids.Select(id => new TrackAudioFeatures
+                        {
+                            Id = id,
+                            Acousticness = 0.5f,
+                            AnalysisUrl = "http://some.url/",
+                            Danceability = 0.5f,
+                            DurationMs = 123,
+                            Energy = 0.5f,
+                            Instrumentalness = 0.5f,
+                            Key = 3,
+                            Liveness = 0.5f,
+                            Loudness = 0.5f,
+                            Mode = 0,
+                            Speechiness = 0.5f,
+                            Tempo = 123,
+                            TimeSignature = 4,
+                            TrackHref = "http://some.href/",
+                            Type = "SomeType",
+                            Uri = "http://some.uri",
+                            Valence = 0.5f,
+                        }).ToList(),
+                    };
+                    return Task.FromResult(response);
+                });
 
             var userMock = new Mock<IUserProfileClient>();
             userMock.Setup(user => user.Current())
                 .Returns(() => Task.FromResult(User));
 
+            // TODO this was not tested yet
+            var artistMock = new Mock<IArtistsClient>();
+            artistMock.Setup(artist => artist.GetSeveral(It.IsAny<ArtistsRequest>()))
+                .Returns((ArtistsRequest req) =>
+                {
+                    var response = new ArtistsResponse
+                    {
+                        Artists = req.Ids.Select(id => new FullArtist
+                        {
+                            Id = id, // TODO this is technically not needed (only genres are needed)
+                            Genres = new List<string> { "genre1", "genre2" },
+                            Name = $"{id}.Name", // TODO this is technically not needed (only genres are needed)
+                        }).ToList(),
+                    };
+                    return Task.FromResult(response);
+                });
+
             mock.SetupGet(client => client.Library).Returns(libraryMock.Object);
             mock.SetupGet(client => client.Playlists).Returns(playlistsMock.Object);
             mock.SetupGet(client => client.Follow).Returns(followMock.Object);
             mock.SetupGet(client => client.Albums).Returns(albumMock.Object);
             mock.SetupGet(client => client.Tracks).Returns(trackMock.Object);
             mock.SetupGet(client => client.UserProfile).Returns(userMock.Object);
+            mock.SetupGet(client => client.Artists).Returns(artistMock.Object);
 
 
             SpotifyClient = mock.Object;