diff --git a/web/src/routes/admin/integrations/integrations.test.ts b/web/src/routes/admin/integrations/integrations.test.ts
index c7e79622..30b33732 100644
--- a/web/src/routes/admin/integrations/integrations.test.ts
+++ b/web/src/routes/admin/integrations/integrations.test.ts
@@ -95,6 +95,17 @@ const defaultCoverProviders = {
   sources_version: 1
 };
 
+const testResponseOk = {
+  ok: true as const,
+  version: '2.0.5',
+  quality_profiles: [
+    { id: 1, name: 'FLAC' },
+    { id: 2, name: 'MP3-320' }
+  ],
+  metadata_profiles: [{ id: 1, name: 'Standard' }],
+  root_folders: [{ path: '/music', accessible: true, free_space: 12345 }]
+};
+
 const smtpUnset: SMTPConfig = {
   enabled: false,
   host: '',
@@ -509,3 +520,118 @@ describe('/admin/integrations — SMTP card', () => {
     );
   });
 });
+
+describe('Lidarr first-time setup (Test-then-Save)', () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  test('Save calls test first, fills defaults from response, then put-config', async () => {
+    vi.mocked(createLidarrConfigQuery).mockReturnValue(mockQuery(cfgUnset));
+    vi.mocked(createQualityProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createMetadataProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createRootFoldersQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createCoverProvidersQuery).mockReturnValue(mockQuery(defaultCoverProviders));
+    vi.mocked(createSMTPConfigQuery).mockReturnValue(mockQuery(smtpUnset));
+    vi.mocked(testLidarrConnection).mockResolvedValue(testResponseOk);
+    vi.mocked(putLidarrConfig).mockResolvedValue(cfgConnected);
+
+    render(IntegrationsPage);
+
+    await fireEvent.input(screen.getByLabelText(/Base URL/i), {
+      target: { value: 'http://lidarr.local' }
+    });
+    await fireEvent.input(screen.getByLabelText(/API key/i), {
+      target: { value: 'secret-key' }
+    });
+    await fireEvent.click(screen.getByRole('button', { name: /Save changes/i }));
+
+    await waitFor(() => {
+      expect(testLidarrConnection).toHaveBeenCalledWith({
+        base_url: 'http://lidarr.local',
+        api_key: 'secret-key'
+      });
+    });
+    await waitFor(() => {
+      expect(putLidarrConfig).toHaveBeenCalledWith({
+        enabled: true,
+        base_url: 'http://lidarr.local',
+        api_key: 'secret-key',
+        default_quality_profile_id: 1,
+        default_metadata_profile_id: 1,
+        default_root_folder_path: '/music'
+      });
+    });
+  });
+
+  test('Save aborts when test fails and surfaces the error', async () => {
+    vi.mocked(createLidarrConfigQuery).mockReturnValue(mockQuery(cfgUnset));
+    vi.mocked(createQualityProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createMetadataProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createRootFoldersQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createCoverProvidersQuery).mockReturnValue(mockQuery(defaultCoverProviders));
+    vi.mocked(createSMTPConfigQuery).mockReturnValue(mockQuery(smtpUnset));
+    vi.mocked(testLidarrConnection).mockResolvedValue({
+      ok: false,
+      error: 'lidarr_unreachable'
+    });
+
+    render(IntegrationsPage);
+
+    await fireEvent.input(screen.getByLabelText(/Base URL/i), {
+      target: { value: 'http://wrong.local' }
+    });
+    await fireEvent.input(screen.getByLabelText(/API key/i), {
+      target: { value: 'k' }
+    });
+    await fireEvent.click(screen.getByRole('button', { name: /Save changes/i }));
+
+    await waitFor(() => {
+      expect(testLidarrConnection).toHaveBeenCalled();
+    });
+    expect(putLidarrConfig).not.toHaveBeenCalled();
+    await waitFor(() => {
+      expect(screen.getByText(/Save failed — lidarr_unreachable/i)).toBeInTheDocument();
+    });
+  });
+
+  test('Save preserves operator-picked defaults over auto-defaults', async () => {
+    vi.mocked(createLidarrConfigQuery).mockReturnValue(mockQuery(cfgUnset));
+    vi.mocked(createQualityProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createMetadataProfilesQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createRootFoldersQuery).mockReturnValue(mockQuery([]));
+    vi.mocked(createCoverProvidersQuery).mockReturnValue(mockQuery(defaultCoverProviders));
+    vi.mocked(createSMTPConfigQuery).mockReturnValue(mockQuery(smtpUnset));
+    vi.mocked(testLidarrConnection).mockResolvedValue(testResponseOk);
+    vi.mocked(putLidarrConfig).mockResolvedValue(cfgConnected);
+
+    render(IntegrationsPage);
+
+    await fireEvent.input(screen.getByLabelText(/Base URL/i), {
+      target: { value: 'http://lidarr.local' }
+    });
+    await fireEvent.input(screen.getByLabelText(/API key/i), {
+      target: { value: 'secret-key' }
+    });
+    // Click Test first to populate the dropdowns, then change the
+    // quality profile selection before clicking Save.
+    await fireEvent.click(screen.getByRole('button', { name: /Test connection/i }));
+    await waitFor(() => {
+      expect(testLidarrConnection).toHaveBeenCalledTimes(1);
+    });
+    const qualitySelect = screen.getByLabelText(/Default quality profile/i);
+    await fireEvent.change(qualitySelect, { target: { value: '2' } });
+
+    await fireEvent.click(screen.getByRole('button', { name: /Save changes/i }));
+
+    await waitFor(() => {
+      expect(putLidarrConfig).toHaveBeenCalledWith(
+        expect.objectContaining({
+          default_quality_profile_id: 2,
+          default_metadata_profile_id: 1,
+          default_root_folder_path: '/music'
+        })
+      );
+    });
+  });
+});