diff --git a/app/test/config.test.js b/app/test/config.test.js
index d673eab..d3f6001 100644
--- a/app/test/config.test.js
+++ b/app/test/config.test.js
@@ -104,6 +104,21 @@ test('loadConfig 於 GITEA_REPOSITORY 邊界格式（空段/缺斜線/多段）
     }
 });
 
+test('loadConfig 於 GITEA_REPOSITORY 含非法字元或超長段時拋錯', () => {
+    const bad = [
+        'ow ner/repo',
+        'owner/re*po',
+        'owner/re:po',
+        `${'a'.repeat(101)}/repo`,
+    ];
+    for (const repo of bad) {
+        assert.throws(() => loadConfig({
+            GITEA_SERVER_URL: 'https://gitea.example.com',
+            GITEA_REPOSITORY: repo,
+        }), /GITEA_REPOSITORY 格式錯誤/, `應拒絕：${repo}`);
+    }
+});
+
 test('loadConfig 接受含點號的合法 owner/repo', () => {
     const config = loadConfig({
         GITEA_SERVER_URL: 'https://gitea.example.com',