diff --git a/package.json b/package.json
index 20ece96..68a4d1d 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "test": "vitest"
   },
   "keywords": [],
   "author": "",
diff --git a/tests/contact.test.tsx b/tests/contact.test.tsx
new file mode 100644
index 0000000..cf3b522
--- /dev/null
+++ b/tests/contact.test.tsx
@@ -0,0 +1,97 @@
+import { render, screen, fireEvent, waitFor } from '@testing-library/react'
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
+import Contact from '../app/kontakt/page'
+
+// Mock fetch
+const fetchMock = vi.fn()
+global.fetch = fetchMock
+
+// Mock alert
+const alertMock = vi.fn()
+global.alert = alertMock
+
+describe('Contact Page', () => {
+  beforeEach(() => {
+    fetchMock.mockClear()
+    alertMock.mockClear()
+  })
+
+  it('renders the contact form correctly', () => {
+    render(<Contact />)
+    
+    expect(screen.getByLabelText(/Name \*/i)).toBeInTheDocument()
+    expect(screen.getByLabelText(/Firma/i)).toBeInTheDocument()
+    expect(screen.getByLabelText(/E-Mail \*/i)).toBeInTheDocument()
+    expect(screen.getByLabelText(/Nachricht \*/i)).toBeInTheDocument()
+    expect(screen.getByRole('button', { name: /Nachricht senden/i })).toBeInTheDocument()
+  })
+
+  it('submits the form successfully', async () => {
+    fetchMock.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ success: true }),
+    })
+
+    render(<Contact />)
+
+    fireEvent.change(screen.getByLabelText(/Name \*/i), { target: { value: 'John Doe' } })
+    fireEvent.change(screen.getByLabelText(/Firma/i), { target: { value: 'Acme Corp' } })
+    fireEvent.change(screen.getByLabelText(/E-Mail \*/i), { target: { value: 'john@example.com' } })
+    fireEvent.change(screen.getByLabelText(/Nachricht \*/i), { target: { value: 'This is a test message that is long enough.' } })
+
+    fireEvent.click(screen.getByRole('button', { name: /Nachricht senden/i }))
+
+    await waitFor(() => {
+      expect(fetchMock).toHaveBeenCalledTimes(1)
+      expect(fetchMock).toHaveBeenCalledWith('/api/contact', expect.objectContaining({
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          name: 'John Doe',
+          company: 'Acme Corp',
+          email: 'john@example.com',
+          message: 'This is a test message that is long enough.',
+          website: ''
+        }),
+      }))
+    })
+
+    expect(screen.getByText(/Nachricht gesendet/i)).toBeInTheDocument()
+    expect(screen.getByText(/Vielen Dank für Ihre Anfrage/i)).toBeInTheDocument()
+  })
+
+  it('handles submission errors', async () => {
+    fetchMock.mockResolvedValueOnce({
+      ok: false,
+      json: async () => ({ error: 'Server error' }),
+    })
+
+    render(<Contact />)
+
+    fireEvent.change(screen.getByLabelText(/Name \*/i), { target: { value: 'John Doe' } })
+    fireEvent.change(screen.getByLabelText(/E-Mail \*/i), { target: { value: 'john@example.com' } })
+    fireEvent.change(screen.getByLabelText(/Nachricht \*/i), { target: { value: 'This is a test message that is long enough.' } })
+
+    fireEvent.click(screen.getByRole('button', { name: /Nachricht senden/i }))
+
+    await waitFor(() => {
+      expect(alertMock).toHaveBeenCalledWith('Fehler: Server error')
+    })
+  })
+
+  it('handles network errors', async () => {
+    fetchMock.mockRejectedValueOnce(new Error('Network error'))
+
+    render(<Contact />)
+
+    fireEvent.change(screen.getByLabelText(/Name \*/i), { target: { value: 'John Doe' } })
+    fireEvent.change(screen.getByLabelText(/E-Mail \*/i), { target: { value: 'john@example.com' } })
+    fireEvent.change(screen.getByLabelText(/Nachricht \*/i), { target: { value: 'This is a test message that is long enough.' } })
+
+    fireEvent.click(screen.getByRole('button', { name: /Nachricht senden/i }))
+
+    await waitFor(() => {
+      expect(alertMock).toHaveBeenCalledWith('Es gab einen Fehler beim Senden Ihrer Nachricht.')
+    })
+  })
+})