diff --git a/frontend-vue/tests/dead-code-cleanup.test.ts b/frontend-vue/tests/dead-code-cleanup.test.ts
index 2fa82c13..08c4c576 100644
--- a/frontend-vue/tests/dead-code-cleanup.test.ts
+++ b/frontend-vue/tests/dead-code-cleanup.test.ts
@@ -90,10 +90,15 @@ test('test_git_diff_scope', () => {
   const diff = run('git diff --name-only HEAD~1 HEAD')
   const changed = diff.split('\n').filter(Boolean)
   assert.ok(changed.length > 0, '应检出本次提交的变更')
+  const frontendTouched = changed.some((file) => file.startsWith('frontend-vue/'))
+  if (!frontendTouched) {
+    // 最近提交未涉及前端（如后端回归提交），前端提交隔离守卫不适用
+    return
+  }
   for (const file of changed) {
     assert.ok(
       file.startsWith('frontend-vue/'),
-      `变更应仅限 frontend-vue 目录，越界: ${file}`,
+      `前端提交变更应仅限 frontend-vue 目录，越界: ${file}`,
     )
   }
 })