test('http example', async (t) => {
  t = tspl(t, { plan: 1 })

  const cacheable = new DNSResolver({ resolver })

  const options = {
    hostname: 'example',
    port: 9999,
    lookup: cacheable.lookup
  }

  await t.rejects(makeRequest(options), {
    message: 'connect ECONNREFUSED 127.0.0.127:9999'
  })
})

const makeRequest = (options) =>
  new Promise((resolve, reject) => {
    http.get(options, resolve).once('error', reject)
  })

✖ test/dns-resolver.js (30015.227ms)
  'test timed out after 30000ms'