diff --git a/tests/unit/runtime-host.test.ts b/tests/unit/runtime-host.test.ts
index 4256afff..4f0bf7dc 100644
--- a/tests/unit/runtime-host.test.ts
+++ b/tests/unit/runtime-host.test.ts
@@ -27,6 +27,7 @@ import {
   createStopModelAnimationControlEffect,
   createStopSoundControlEffect
 } from "../../src/controls/control-surface";
+import { createBoxBrush } from "../../src/document/brushes";
 import { createScenePath } from "../../src/document/paths";
 import { createEmptySceneDocument } from "../../src/document/scene-document";
 import {