diff --git a/test/update_test.dart b/test/update_test.dart
index 5910584..c7e33de 100644
--- a/test/update_test.dart
+++ b/test/update_test.dart
@@ -51,6 +51,19 @@ void main() {
     });
   });
 
+  test('실제 GitHub: v1.0.0 에서 최신 찾기 · 받기 · 검증 (JJ_NET_TESTS=1)', () async {
+    if (Platform.environment['JJ_NET_TESTS'] != '1') return markTestSkipped('인터넷 테스트 꺼짐');
+    final tmp = Directory.systemTemp.createTempSync('jj_real_upd_');
+    addTearDown(() => tmp.deleteSync(recursive: true));
+    final up = GitHubUpdater(appDir: tmp.path, versionOverride: '1.0.0');
+    final r = (await up.latest())!;
+    expect(r.isNewerThan('1.0.0'), isTrue);
+    expect(r.sha256, hasLength(64));
+    final dir = await up.download(r, (_) {});
+    expect(File(p.join(dir, 'jj_mkvmaker.exe')).existsSync(), isTrue);
+    expect(File(p.join(dir, 'ffmpeg', 'ffmpeg.exe')).existsSync(), isTrue);
+  }, timeout: const Timeout(Duration(minutes: 10)));
+
   group('GitHubUpdater (가짜 GitHub 서버 · 실제 스크립트)', () {
     late HttpServer server;
     late Directory tmp;