Refine test

test.js

@@ -1,5 +1,5 @@
 import test from 'ava'
-import * as http from 'http'
+import { createServer } from 'http'
 import axiosist from '.'
 
 test('should request', t =>
@@ -93,10 +93,9 @@ test('should response redirect', t =>
     t.is(response.headers.location, 'http://example.com/')
   }))
 
-test('should work with http server', t => {
-  const app = http.createServer((req, res) => {
-    res.end('foo')
-  })
-
-  return axiosist(app).get('/').then(() => t.pass())
-})
+test('should work with http server', t =>
+  axiosist(
+    createServer((req, res) => res.end('foo'))
+  ).get('/').then(response => {
+    t.is(response.data, 'foo')
+  }))