diff --git a/src/app/services/opfs.spec.ts b/src/app/services/opfs.spec.ts
index 63b4b07..3c4330a 100644
--- a/src/app/services/opfs.spec.ts
+++ b/src/app/services/opfs.spec.ts
@@ -29,12 +29,7 @@ describe('OPFS', () => {
       getFileHandle: vi.fn().mockResolvedValue(fileHandleMock),
       removeEntry: vi.fn()
     };
-    (<any>globalThis.navigator).storage = {
-      getDirectory: vi.fn().mockResolvedValue(dirHandleMock),
-      persist: vi.fn().mockResolvedValue(true),
-      persisted: vi.fn().mockResolvedValue(true),
-      estimate: vi.fn().mockResolvedValue({ usage: 100, quota: 1000 }),
-    };
+    vi.spyOn(globalThis.navigator.storage, 'getDirectory').mockResolvedValue(dirHandleMock as any);
 
     TestBed.configureTestingModule({});
     service = TestBed.inject(OPFS);