diff --git a/.xo-config.cjs b/.xo-config.cjs
index ced7c7b3..ccbcf091 100644
--- a/.xo-config.cjs
+++ b/.xo-config.cjs
@@ -55,6 +55,8 @@ module.exports = {
     "no-script-url": "off",
     // 允许 TODO 注释
     "no-warning-comments": "off",
+    // 允许 return await
+    "no-return-await": "off",
     // 允许调用大写开头的函数
     "new-cap": ["error", { "capIsNew": false }],
     // 允许使用复杂的数组解构
diff --git a/src/site/jm.tsx b/src/site/jm.tsx
index 65409c23..53abe4fd 100644
--- a/src/site/jm.tsx
+++ b/src/site/jm.tsx
@@ -62,15 +62,24 @@ import {
     return;
   }
 
+  const downloadImg = async (url: string) => {
+    try {
+      // 使用 fetch 可以复用本地缓存，但有时候会报 cors 问题
+      return await request<Blob>(url, { responseType: 'blob', fetch: true }, 3);
+    } catch {
+      return await request<Blob>(
+        url,
+        { responseType: 'blob', revalidate: true, fetch: false },
+        3,
+      );
+    }
+  };
+
   const getImgUrl = async (imgEle: HTMLImageElement) => {
     if (imgEle.src.startsWith('blob:')) return imgEle.src;
 
     const originalUrl = imgEle.src;
-    const res = await request<Blob>(imgEle.dataset.original!, {
-      responseType: 'blob',
-      revalidate: true,
-      fetch: false,
-    });
+    const res = await downloadImg(imgEle.dataset.original!);
     if (res.response.size === 0) {
       toast.warn(`下载原图时出错: ${imgEle.dataset.page}`);
       return '';
diff --git a/vitest.config.ts b/vitest.config.ts
index 3e9dd460..45d0c9fe 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -9,4 +9,5 @@ export default defineConfig({
   test: {
     alias: { helper: resolve(__dirname, './src/helper') },
   },
+  define: { isDevMode: false },
 });