diff --git a/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs b/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
index f632d85c26..1570205456 100644
--- a/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
+++ b/tests/Avalonia.Benchmarks/NullRenderingPlatform.cs
@@ -28,7 +28,7 @@ namespace Avalonia.Benchmarks
 
         public IGeometryImpl CreateRectangleGeometry(Rect rect)
         {
-            throw new NotImplementedException();
+            return new MockStreamGeometryImpl();
         }
 
         public IStreamGeometryImpl CreateStreamGeometry()