user super and arrow fn

Author: jimmywarting

lib/test.js

@@ -111,18 +111,16 @@ class Test extends Request {
    * @api public
    */
   end(fn) {
-    const self = this;
     const server = this._server;
-    const end = Request.prototype.end;
 
-    end.call(this, function (err, res) {
+    super.end((err, res) => {
+      const localAssert = () => {
+        this.assert(err, res, fn);
+      };
+
       if (server && server._handle) return server.close(localAssert);
 
       localAssert();
-
-      function localAssert() {
-        self.assert(err, res, fn);
-      }
     });
 
     return this;