diff --git a/tests/frontend/components/autocomplete.behavior.test.js b/tests/frontend/components/autocomplete.behavior.test.js
index 16a79ff0..1453d43d 100644
--- a/tests/frontend/components/autocomplete.behavior.test.js
+++ b/tests/frontend/components/autocomplete.behavior.test.js
@@ -37,6 +37,7 @@ vi.mock(APP_MODULE, () => ({
     canvas: {
       ds: { scale: 1 },
     },
+    registerExtension: vi.fn(),
   },
 }));