Do I have to repeat request(app)?

Is there merit in repeating `request(app)`? Do I have to keep repeating it on every test? Can I just perform this step in one initialization file and forget about it?

I'm talking about this:

```
const request = require('supertest');

describe('Articles', function () {
it('should allow users to list all articles', function (done) {
request(app).get('/articles').expect(200, done)
});

it('should allow users to get one article', function (done) {
request(app).get('/articles/2').expect(200, done)
});
});
```