diff --git a/libs/plugins-runtime/src/lib/api/plugin-api.spec.ts b/libs/plugins-runtime/src/lib/api/plugin-api.spec.ts
index 06fb92e..af843a5 100644
--- a/libs/plugins-runtime/src/lib/api/plugin-api.spec.ts
+++ b/libs/plugins-runtime/src/lib/api/plugin-api.spec.ts
@@ -28,7 +28,7 @@ describe('Plugin api', () => {
     getSelected: vi.fn(),
     getSelectedShapes: vi.fn(),
     getTheme: vi.fn(() => 'dark'),
-    addListener: vi.fn(() => Symbol()),
+    addListener: vi.fn().mockReturnValueOnce(Symbol()),
     removeListener: vi.fn(),
   };