[Unit Testing] Set the timeout of a Test in Mocha

const bankAccounts = [
    {
        name: 'John',
        id: 1,
        account: '347496844548723216',
        balance: 100
    },
    {
        name: 'Jane',
        id: 2,
        account: '447496844568723219',
        balance: 200
    }
]
module.exports = {
    getBalance(id, cb) {
        setTimeout(() => {
            const { balance } = bankAccounts.find(a => a.id === id);
            if (!balance) cb('could not find balance');
            cb(null, balance)
        }, 3200)
    }
}      

const { expect } = require('chai');
const bankAccount = require('../modules/bank-account');

describe('BankAccount',function(){
    this.timeout(3500);
    it('should get the balance', function(done){
        bankAccount.getBalance(1,(err, balance) => {
            if(err){
                throw err;
            }
            expect(balance).to.equals(100);
            done();
        })
    })
})