diff --git a/docs/src/test-components-js.md b/docs/src/test-components-js.md
index fcf022947f..0d8aad2fd1 100644
--- a/docs/src/test-components-js.md
+++ b/docs/src/test-components-js.md
@@ -148,7 +148,7 @@ test('should work', async ({ mount }) => {
 ```
 If using TypeScript and Vue make sure to add a `vue.d.ts` file to your project:
 
-```ts
+```js
 declare module '*.vue';
 ```