How to mock the same request of different origins URLs (for TestCafe)

I need to mock the same request, that is initiated by 2 different origins (url1, url2). But the only one request (from 1st origin url1) is mocked. How to work with multiple origins? Thanks in advance.

const urlRegExp = new RegExp('/events');
const mock = RequestMock()
    .onRequestTo(urlRegExp)
    .respond({eenter code hererror: 'this request has been mocked'}, 500, {
        'access-control-allow-origin': 'url1.com',
        'access-control-allow-credentials': true
    })
    .onRequestTo(urlRegExp)
    .respond({error: 'this request has been mocked'}, 500, {
        'access-control-allow-origin': 'url2.com',
        'access-control-allow-credentials': true
    });