diff --git a/lib/exporter/extras.overrides.test.ts b/lib/exporter/extras.overrides.test.ts
new file mode 100644
index 0000000..367dc06
--- /dev/null
+++ b/lib/exporter/extras.overrides.test.ts
@@ -0,0 +1,45 @@
+import { describe, it, expect } from 'vitest'
+import { pageSchema, type Page } from '@/lib/schema/page'
+import { buildExtrasForPage } from '@/lib/exporter/extras'
+
+function makePage(): Page {
+  return pageSchema.parse({
+    title: 'Overrides',
+    locale: 'en',
+    theme: { primaryColor: '#2563eb', fontFamily: 'Inter' },
+    sections: [ { type: 'hero', props: { heading: 'Hello', subheading: 'World', imageUrl: 'https://img/h.png' } } ],
+    form: { actionUrl: '', fields: [], spamProtection: { honeypotFieldName: '_hp', minSubmitSeconds: 2 } },
+    seo: { title: 't', description: 'd' },
+  })
+}
+
+describe('extras 오버라이드', () => {
+  it('robots.txt Disallow 오버라이드가 반영된다', () => {
+    const page = makePage()
+    const extras = buildExtrasForPage(page, { robotsText: 'User-agent: *\nDisallow: /admin\nDisallow: /private' })
+    const robots = Buffer.from(extras['robots.txt']).toString('utf8')
+    expect(robots).toContain('User-agent: *')
+    expect(robots).toContain('Disallow: /admin')
+    expect(robots).toContain('Disallow: /private')
+  })
+
+  it('manifest 필드 오버라이드(name/short_name/start_url/display/theme_color)가 반영된다', () => {
+    const page = makePage()
+    const extras = buildExtrasForPage(page, {
+      manifest: {
+        name: 'My App',
+        short_name: 'MyApp',
+        start_url: '/start',
+        display: 'minimal-ui',
+        theme_color: '#123abc',
+      },
+    })
+    const manifestStr = Buffer.from(extras['site.webmanifest']).toString('utf8')
+    const manifest = JSON.parse(manifestStr)
+    expect(manifest.name).toBe('My App')
+    expect(manifest.short_name).toBe('MyApp')
+    expect(manifest.start_url).toBe('/start')
+    expect(manifest.display).toBe('minimal-ui')
+    expect(manifest.theme_color).toBe('#123abc')
+  })
+})