diff --git a/apps/desktop/src/test/setup.ts b/apps/desktop/src/test/setup.ts
index ce0cb1c..dd318eb 100644
--- a/apps/desktop/src/test/setup.ts
+++ b/apps/desktop/src/test/setup.ts
@@ -13,11 +13,16 @@ Object.defineProperty(window, '__TAURI__', {
 
 // Mock IntersectionObserver
 global.IntersectionObserver = class IntersectionObserver {
+  root = null;
+  rootMargin = '';
+  thresholds = [];
+
   constructor() {}
   disconnect() {}
   observe() {}
   unobserve() {}
-};
+  takeRecords() { return []; }
+} as any;
 
 // Mock ResizeObserver
 global.ResizeObserver = class ResizeObserver {
@@ -44,9 +49,11 @@ Object.defineProperty(window, 'matchMedia', {
 
 // Mock localStorage
 const localStorageMock = {
+  length: 0,
   getItem: vi.fn(),
   setItem: vi.fn(),
   removeItem: vi.fn(),
   clear: vi.fn(),
-};
+  key: vi.fn(),
+} as Storage;
 global.localStorage = localStorageMock;