Deno テストで Leaks detected というエラーが発生したとき原因と解決例

import { assertRejects } from "jsr:@std/assert";
import { delay } from "jsr:@std/async";

Deno.test("async function test", () => {
  assertRejects(async () => {
    await delay(3000);
    throw new Error("error");
  });
});

deno test

running 1 test from ./test.ts
async function test ... FAILED (2ms)

 ERRORS 

async function test => ./test.ts:4:6
error: Leaks detected:
  - A timer was started in this test, but never completed. This is often caused by not calling `clearTimeout`.
To get more details where leaks occurred, run again with the --trace-leaks flag.

 FAILURES 

async function test => ./test.ts:4:6

FAILED | 0 passed | 1 failed (13ms)

error: Test failed

import { assertRejects } from "jsr:@std/assert";
import { delay } from "jsr:@std/async";

Deno.test("async function test", async () => {
 await assertRejects(async () => {
    await delay(3000);
    throw new Error("error");
  });
});