diff --git a/osu.Framework.Tests/Visual/Audio/TestSceneAudioMixer.cs b/osu.Framework.Tests/Visual/Audio/TestSceneAudioMixer.cs
index 61849bce33..0fa2481396 100644
--- a/osu.Framework.Tests/Visual/Audio/TestSceneAudioMixer.cs
+++ b/osu.Framework.Tests/Visual/Audio/TestSceneAudioMixer.cs
@@ -78,7 +78,7 @@ protected override void Update()
             }
         }
 
-        private class AudioPlayingDrawable : CompositeDrawable
+        private partial class AudioPlayingDrawable : CompositeDrawable
         {
             [BackgroundDependencyLoader]
             private void load(ISampleStore samples)