diff --git a/osu.Game.Tests/Gameplay/TestSceneHitObjectSamples.cs b/osu.Game.Tests/Gameplay/TestSceneHitObjectSamples.cs
index 366437a771..f611f2717e 100644
--- a/osu.Game.Tests/Gameplay/TestSceneHitObjectSamples.cs
+++ b/osu.Game.Tests/Gameplay/TestSceneHitObjectSamples.cs
@@ -318,7 +318,7 @@ namespace osu.Game.Tests.Gameplay
                 return new MemoryStream();
             }
 
-            private void markLookup(string name) => PerformedLookups.Add(name.Substring(name.LastIndexOf('/') + 1));
+            private void markLookup(string name) => PerformedLookups.Add(name.Substring(name.LastIndexOf(Path.DirectorySeparatorChar) + 1));
 
             public IEnumerable<string> GetAvailableResources() => Enumerable.Empty<string>();