diff --git a/docs/api/index.md b/docs/api/index.md
index d12531ec4c76..fa00357268d1 100644
--- a/docs/api/index.md
+++ b/docs/api/index.md
@@ -1181,6 +1181,8 @@ You cannot use this syntax, when using Vitest as [type checker](/guide/testing-t
 
 - **Type:** `(received: any) => Awaitable<void>`
 
+- **Alias:** `toThrow`
+
   `toThrowError` asserts if a function throws an error when it is called.
 
   For example, if we want to test that `getFruitStock('pineapples')` throws, we could write:
@@ -1216,6 +1218,10 @@ You cannot use this syntax, when using Vitest as [type checker](/guide/testing-t
   })
   ```
 
+  :::tip
+    To test async functions, use in combination with [rejects](#rejects).
+  :::
+
 ### toMatchSnapshot
 
 - **Type:** `<T>(shape?: Partial<T> | string, message?: string) => void`