diff --git a/frontend/src/__tests__/components/NotificationProviderCard.test.tsx b/frontend/src/__tests__/components/NotificationProviderCard.test.tsx
index 9addb255d..ca4d1af96 100644
--- a/frontend/src/__tests__/components/NotificationProviderCard.test.tsx
+++ b/frontend/src/__tests__/components/NotificationProviderCard.test.tsx
@@ -5,7 +5,7 @@
  */
 
 import { describe, it, expect, vi, beforeEach } from 'vitest';
-import { screen, waitFor } from '@testing-library/react';
+import { screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { render } from '../utils';
 import type { NotificationProvider } from '../../api/client';
@@ -67,6 +67,9 @@ const createMockProvider = (
   daily_digest_enabled: false,
   daily_digest_time: null,
   printer_id: null,
+  last_success: null,
+  last_error: null,
+  last_error_at: null,
   created_at: '2024-01-01T00:00:00Z',
   updated_at: '2024-01-01T00:00:00Z',
   ...overrides,
diff --git a/frontend/src/__tests__/components/SmartPlugCard.test.tsx b/frontend/src/__tests__/components/SmartPlugCard.test.tsx
index 541163461..37704e316 100644
--- a/frontend/src/__tests__/components/SmartPlugCard.test.tsx
+++ b/frontend/src/__tests__/components/SmartPlugCard.test.tsx
@@ -38,8 +38,6 @@ const createMockPlug = (overrides: Partial<SmartPlug> = {}): SmartPlug => ({
   last_state: 'ON',
   last_checked: null,
   auto_off_executed: false,
-  auto_off_pending: false,
-  auto_off_pending_since: null,
   created_at: '2024-01-01T00:00:00Z',
   updated_at: '2024-01-01T00:00:00Z',
   ...overrides,
diff --git a/frontend/src/__tests__/hooks/useWebSocket.test.ts b/frontend/src/__tests__/hooks/useWebSocket.test.ts
index 5c79ff850..3ff24118d 100644
--- a/frontend/src/__tests__/hooks/useWebSocket.test.ts
+++ b/frontend/src/__tests__/hooks/useWebSocket.test.ts
@@ -5,7 +5,7 @@
  */
 
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
-import { renderHook, act, waitFor } from '@testing-library/react';
+import { waitFor } from '@testing-library/react';
 
 // Mock WebSocket
 class MockWebSocket {
@@ -32,7 +32,7 @@ class MockWebSocket {
     }, 10);
   }
 
-  send(data: string) {
+  send(_data: string) {
     // Mock send
   }
 
diff --git a/frontend/src/__tests__/mocks/handlers.ts b/frontend/src/__tests__/mocks/handlers.ts
index 18dbc1ec1..b4c5d6556 100644
--- a/frontend/src/__tests__/mocks/handlers.ts
+++ b/frontend/src/__tests__/mocks/handlers.ts
@@ -103,9 +103,10 @@ export const handlers = [
 
   http.post('/api/v1/smart-plugs/', async ({ request }) => {
     const body = (await request.json()) as Record<string, unknown>;
+    const { id: _id, ...baseData } = mockSmartPlugs[0];
     const newPlug = {
       id: mockSmartPlugs.length + 1,
-      ...mockSmartPlugs[0],
+      ...baseData,
       ...body,
     };
     return HttpResponse.json(newPlug);
@@ -171,9 +172,10 @@ export const handlers = [
 
   http.post('/api/v1/notifications/', async ({ request }) => {
     const body = (await request.json()) as Record<string, unknown>;
+    const { id: _id, ...baseData } = mockNotificationProviders[0];
     const newProvider = {
       id: mockNotificationProviders.length + 1,
-      ...mockNotificationProviders[0],
+      ...baseData,
       ...body,
     };
     return HttpResponse.json(newProvider);
diff --git a/frontend/src/__tests__/setup.ts b/frontend/src/__tests__/setup.ts
index 8a2874580..0c9357eff 100644
--- a/frontend/src/__tests__/setup.ts
+++ b/frontend/src/__tests__/setup.ts
@@ -63,7 +63,9 @@ class MockWebSocket {
   onmessage: ((event: MessageEvent) => void) | null = null;
   onerror: ((event: Event) => void) | null = null;
 
-  constructor(public url: string) {
+  url: string;
+  constructor(url: string) {
+    this.url = url;
     setTimeout(() => this.onopen?.(new Event('open')), 0);
   }
 
diff --git a/frontend/src/__tests__/utils.tsx b/frontend/src/__tests__/utils.tsx
index a1889f20b..42702c837 100644
--- a/frontend/src/__tests__/utils.tsx
+++ b/frontend/src/__tests__/utils.tsx
@@ -3,7 +3,8 @@
  */
 
 import React from 'react';
-import { render, RenderOptions } from '@testing-library/react';
+import { render } from '@testing-library/react';
+import type { RenderOptions } from '@testing-library/react';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { BrowserRouter } from 'react-router-dom';
 import { ThemeProvider } from '../contexts/ThemeContext';