supertest-light is

• an ultra-minimalist take on supertest
• much smaller
• and removes idiosyncratic aspects such as expect

Example

(async () => {
  const res = await request(app)
    .set("User-Agent", "Supertest-Light")
    .get("/user/bart/messages");

  assert.equal(res.text, "Hello bart!");
})();

Note that .get, .post, and .send are all terminals that return a promise.