diff --git a/frontend/tests/unit/TimeAdjuster.test.tsx b/frontend/tests/unit/TimeAdjuster.test.tsx
index f0fae4b..4a1d5a4 100644
--- a/frontend/tests/unit/TimeAdjuster.test.tsx
+++ b/frontend/tests/unit/TimeAdjuster.test.tsx
@@ -15,8 +15,10 @@ describe('TimeAdjuster', () => {
     const { container } = render(<TimeAdjuster onTimeChange={handleChange} />);
     const input = container.querySelector('input');
     
+    vi.clearAllMocks();
+    
     fireEvent.change(input!, { target: { value: '2024-01-01T12:00' } });
-    expect(handleChange).toHaveBeenCalledWith('2024-01-01T12:00');
+    expect(handleChange).toHaveBeenCalledWith(new Date('2024-01-01T12:00').toISOString());
   });
 
   it('resets to now when reset button is clicked', async () => {
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 24a2fc3..3cdef26 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -8,6 +8,8 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'jsdom',
+    include: ['src/**/*.{test,spec}.{ts,tsx}', 'tests/**/*.{test,spec}.{ts,tsx}'],
+    exclude: ['**/tests/e2e/**', '**/node_modules/**'],
   },
   resolve: {
     alias: {