Mocha with Mongoose、async、Wait

我正在使用mocha进行测试,当使用async/await时,我得到

  Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

我的代码

describe('ClientsMerge', () => {

    it('it should get all clients', async () => {
let clients = await Client.find();
console.log(clients);
    });

});