diff --git a/packages/core/src/__tests__/test-utils.ts b/packages/core/src/__tests__/test-utils.ts
index f10d352c8..50a86c42d 100644
--- a/packages/core/src/__tests__/test-utils.ts
+++ b/packages/core/src/__tests__/test-utils.ts
@@ -90,6 +90,7 @@ export function createMockPlugins(): MockPlugins {
     name: "mock-ws",
     create: vi.fn(),
     destroy: vi.fn(),
+    list: vi.fn().mockResolvedValue([]),
   };
 
   return { runtime, agent, workspace };