diff --git a/docs/api/mock.md b/docs/api/mock.md
index ccdefd837946..27a58ef5b91e 100644
--- a/docs/api/mock.md
+++ b/docs/api/mock.md
@@ -7,7 +7,7 @@ import { vi } from 'vitest'
 
 const fn = vi.fn()
 fn('hello world')
-fn.mock.calls[0] === ['hello world']
+fn.mock.calls[0][0] === 'hello world'
 
 const market = {
   getApples: () => 100