add missing side-effect import

test/render.spec.tsx

@@ -8,14 +8,16 @@ import { createReconciler, ReconcilerInstance } from '../src/render';
 import { SceneContext } from '../src/hooks/scene';
 import { CustomPropsHandler, PropChangeType } from '../src/PropsHandler';
 import { NullEngine } from '@babylonjs/core/Engines/nullEngine';
-import { Scene } from '@babylonjs/core/scene';
+
 import { Engine } from '@babylonjs/core/Engines/engine';
 import { Vector3 } from '@babylonjs/core/Maths/math.vector';
 import { ArcRotateCamera } from '@babylonjs/core/Cameras/arcRotateCamera';
 import { EffectLayer } from '@babylonjs/core/Layers/effectLayer';
 import { GlowLayer } from '@babylonjs/core/Layers/glowLayer';
 import { AbstractMesh } from '@babylonjs/core/Meshes/abstractMesh';
 import { Camera } from '@babylonjs/core/Cameras/camera';
+import { Scene } from '@babylonjs/core/scene';
+import '@babylonjs/core/Rendering/boundingBoxRenderer';
 
 describe(' > Reconciler/Render tests', function testSuite() {