diff --git a/.eslintrc b/.eslintrc
index f877f9e..a894fff 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -11,3 +11,4 @@ rules:
   yoda: 0
   arrow-parens: [2, "as-needed"]
   arrow-spacing: 2
+  dot-location: [2, "property"]
diff --git a/lib/application.js b/lib/application.js
index b6e2b03..ed9e231 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -92,9 +92,7 @@ module.exports = class Application extends Emitter {
   use(fn) {
     debug('use %s', fn._name || fn.name || '-');
     if (typeof fn !== 'function') throw new TypeError('middleware must be a function!');
-    if (isGeneratorFunction(fn)) {
-      throw new TypeError('Support for generators has been removed. Use Promises or wrap your generator with co.wrap');
-    }
+    if (isGeneratorFunction(fn)) throw new TypeError('Support for generators has been removed. Use Promises or wrap your generator with co.wrap');
     this.middleware.push(fn);
     return this;
   }
diff --git a/lib/request.js b/lib/request.js
index ce98d81..b0ed9ca 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -81,9 +81,7 @@ module.exports = {
 
   get href() {
     // support: `GET http://example.com/foo`
-    if (/^https?:\/\//i.test(this.originalUrl)) {
-      return this.originalUrl;
-    }
+    if (/^https?:\/\//i.test(this.originalUrl)) return this.originalUrl;
     return this.origin + this.originalUrl;
   },
 
@@ -400,12 +398,13 @@ module.exports = {
   /**
    * Return subdomains as an array.
    *
-   * Subdomains are the dot-separated parts of the host before the main domain of
-   * the app. By default, the domain of the app is assumed to be the last two
+   * Subdomains are the dot-separated parts of the host before the main domain
+   * of the app. By default, the domain of the app is assumed to be the last two
    * parts of the host. This can be changed by setting `app.subdomainOffset`.
    *
    * For example, if the domain is "tobi.ferrets.example.com":
-   * If `app.subdomainOffset` is not set, this.subdomains is `["ferrets", "tobi"]`.
+   * If `app.subdomainOffset` is not set, this.subdomains is
+   * `["ferrets", "tobi"]`.
    * If `app.subdomainOffset` is 3, this.subdomains is `["tobi"]`.
    *
    * @return {Array}
diff --git a/lib/response.js b/lib/response.js
index 7bcb151..5a814df 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -446,9 +446,11 @@ module.exports = {
    *
    * Examples:
    *
-   *    this.append('Link', ['<http://localhost/>', '<http://localhost:3000/>']);
-   *    this.append('Set-Cookie', 'foo=bar; Path=/; HttpOnly');
-   *    this.append('Warning', '199 Miscellaneous warning');
+   * ```
+   * this.append('Link', ['<http://localhost/>', '<http://localhost:3000/>']);
+   * this.append('Set-Cookie', 'foo=bar; Path=/; HttpOnly');
+   * this.append('Warning', '199 Miscellaneous warning');
+   * ```
    *
    * @param {String} field
    * @param {String|Array} val
diff --git a/test/application/context.js b/test/application/context.js
index 257cb57..6ff32d0 100644
--- a/test/application/context.js
+++ b/test/application/context.js
@@ -17,8 +17,8 @@ describe('app.context', function(){
     });
 
     request(app1.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 
   it('should not affect the original prototype', function(done){
@@ -28,7 +28,7 @@ describe('app.context', function(){
     });
 
     request(app2.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 });
diff --git a/test/application/index.js b/test/application/index.js
index 86320bb..9f18709 100644
--- a/test/application/index.js
+++ b/test/application/index.js
@@ -20,8 +20,8 @@ describe('app', function(){
     });
 
     request(app.listen())
-    .get('/')
-    .end(function(){});
+      .get('/')
+      .end(function(){});
   });
 
   it('should not .writeHead when !socket.writable', function(done){
@@ -42,8 +42,8 @@ describe('app', function(){
     setImmediate(done);
 
     request(app.listen())
-    .get('/')
-    .end(function(){});
+      .get('/')
+      .end(function(){});
   });
 
   it('should set development env when NODE_ENV missing', function(){
diff --git a/test/application/request.js b/test/application/request.js
index 3f85cc1..7e79966 100644
--- a/test/application/request.js
+++ b/test/application/request.js
@@ -17,8 +17,8 @@ describe('app.request', function(){
     });
 
     request(app1.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 
   it('should not affect the original prototype', function(done){
@@ -28,7 +28,7 @@ describe('app.request', function(){
     });
 
     request(app2.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 });
diff --git a/test/application/respond.js b/test/application/respond.js
index bb7d640..ff2adeb 100644
--- a/test/application/respond.js
+++ b/test/application/respond.js
@@ -27,10 +27,10 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(200)
-      .expect('lol')
-      .end(done);
+        .get('/')
+        .expect(200)
+        .expect('lol')
+        .end(done);
     });
   });
 
@@ -67,15 +67,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(200)
-      .end(function(err, res){
-        if (err) return done(err);
-        res.should.have.header('Content-Type', 'text/plain; charset=utf-8');
-        res.should.have.header('Content-Length', '5');
-        assert(0 == res.text.length);
-        done();
-      });
+        .head('/')
+        .expect(200)
+        .end(function(err, res){
+          if (err) return done(err);
+          res.should.have.header('Content-Type', 'text/plain; charset=utf-8');
+          res.should.have.header('Content-Length', '5');
+          assert(0 == res.text.length);
+          done();
+        });
     });
 
     it('should keep json headers', function(done){
@@ -88,15 +88,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(200)
-      .end(function(err, res){
-        if (err) return done(err);
-        res.should.have.header('Content-Type', 'application/json; charset=utf-8');
-        res.should.have.header('Content-Length', '17');
-        assert(0 == res.text.length);
-        done();
-      });
+        .head('/')
+        .expect(200)
+        .end(function(err, res){
+          if (err) return done(err);
+          res.should.have.header('Content-Type', 'application/json; charset=utf-8');
+          res.should.have.header('Content-Length', '17');
+          assert(0 == res.text.length);
+          done();
+        });
     });
 
     it('should keep string headers', function(done){
@@ -109,15 +109,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(200)
-      .end(function(err, res){
-        if (err) return done(err);
-        res.should.have.header('Content-Type', 'text/plain; charset=utf-8');
-        res.should.have.header('Content-Length', '11');
-        assert(0 == res.text.length);
-        done();
-      });
+        .head('/')
+        .expect(200)
+        .end(function(err, res){
+          if (err) return done(err);
+          res.should.have.header('Content-Type', 'text/plain; charset=utf-8');
+          res.should.have.header('Content-Length', '11');
+          assert(0 == res.text.length);
+          done();
+        });
     });
 
     it('should keep buffer headers', function(done){
@@ -130,15 +130,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(200)
-      .end(function(err, res){
-        if (err) return done(err);
-        res.should.have.header('Content-Type', 'application/octet-stream');
-        res.should.have.header('Content-Length', '11');
-        assert(0 == res.text.length);
-        done();
-      });
+        .head('/')
+        .expect(200)
+        .end(function(err, res){
+          if (err) return done(err);
+          res.should.have.header('Content-Type', 'application/octet-stream');
+          res.should.have.header('Content-Length', '11');
+          assert(0 == res.text.length);
+          done();
+        });
     });
 
     it('should respond with a 404 if no body was set', function(done){
@@ -151,8 +151,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(404, done);
+        .head('/')
+        .expect(404, done);
     });
 
     it('should respond with a 200 if body = ""', function(done){
@@ -165,8 +165,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect(200, done);
+        .head('/')
+        .expect(200, done);
     });
 
     it('should not overwrite the content-type', function(done){
@@ -180,9 +180,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .head('/')
-      .expect('content-type', /application\/javascript/)
-      .expect(200, done);
+        .head('/')
+        .expect('content-type', /application\/javascript/)
+        .expect(200, done);
     });
   });
 
@@ -193,8 +193,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(404, done);
+        .get('/')
+        .expect(404, done);
     });
   });
 
@@ -217,13 +217,13 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(200)
-      .end(function(err, res){
-        if (err) return done(err);
-        if (errorCaught) return done(errorCaught);
-        done();
-      });
+        .get('/')
+        .expect(200)
+        .end(function(err, res){
+          if (err) return done(err);
+          if (errorCaught) return done(errorCaught);
+          done();
+        });
     });
 
     it('should send the right body', function(done){
@@ -242,9 +242,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(200)
-      .expect('HelloGoodbye', done);
+        .get('/')
+        .expect(200)
+        .expect('HelloGoodbye', done);
     });
   });
 
@@ -260,10 +260,10 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(400)
-        .expect('Content-Length', 11)
-        .expect('Bad Request', done);
+          .get('/')
+          .expect(400)
+          .expect('Content-Length', 11)
+          .expect('Bad Request', done);
       });
     });
 
@@ -278,15 +278,15 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(204)
-        .expect('')
-        .end(function(err, res){
-          if (err) return done(err);
+          .get('/')
+          .expect(204)
+          .expect('')
+          .end(function(err, res){
+            if (err) return done(err);
 
-          res.header.should.not.have.property('content-type');
-          done();
-        });
+            res.header.should.not.have.property('content-type');
+            done();
+          });
       });
     });
 
@@ -301,15 +301,15 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(205)
-        .expect('')
-        .end(function(err, res){
-          if (err) return done(err);
+          .get('/')
+          .expect(205)
+          .expect('')
+          .end(function(err, res){
+            if (err) return done(err);
 
-          res.header.should.not.have.property('content-type');
-          done();
-        });
+            res.header.should.not.have.property('content-type');
+            done();
+          });
       });
     });
 
@@ -324,15 +324,15 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(304)
-        .expect('')
-        .end(function(err, res){
-          if (err) return done(err);
+          .get('/')
+          .expect(304)
+          .expect('')
+          .end(function(err, res){
+            if (err) return done(err);
 
-          res.header.should.not.have.property('content-type');
-          done();
-        });
+            res.header.should.not.have.property('content-type');
+            done();
+          });
       });
     });
 
@@ -348,14 +348,14 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(700)
-        .expect('custom status')
-        .end(function(err, res){
-          if (err) return done(err);
-          res.res.statusMessage.should.equal('custom status');
-          done();
-        });
+          .get('/')
+          .expect(700)
+          .expect('custom status')
+          .end(function(err, res){
+            if (err) return done(err);
+            res.res.statusMessage.should.equal('custom status');
+            done();
+          });
       });
     });
 
@@ -371,14 +371,14 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(200)
-        .expect('ok')
-        .end(function(err, res){
-          if (err) return done(err);
-          res.res.statusMessage.should.equal('ok');
-          done();
-        });
+          .get('/')
+          .expect(200)
+          .expect('ok')
+          .end(function(err, res){
+            if (err) return done(err);
+            res.res.statusMessage.should.equal('ok');
+            done();
+          });
       });
     });
 
@@ -393,9 +393,9 @@ describe('app.respond', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(701)
-        .expect('701', done);
+          .get('/')
+          .expect(701)
+          .expect('701', done);
       });
     });
   });
@@ -411,15 +411,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(204)
-      .expect('')
-      .end(function(err, res){
-        if (err) return done(err);
+        .get('/')
+        .expect(204)
+        .expect('')
+        .end(function(err, res){
+          if (err) return done(err);
 
-        res.header.should.not.have.property('content-type');
-        done();
-      });
+          res.header.should.not.have.property('content-type');
+          done();
+        });
     });
 
     it('should respond 204 with status=200', function(done){
@@ -433,15 +433,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(204)
-      .expect('')
-      .end(function(err, res){
-        if (err) return done(err);
+        .get('/')
+        .expect(204)
+        .expect('')
+        .end(function(err, res){
+          if (err) return done(err);
 
-        res.header.should.not.have.property('content-type');
-        done();
-      });
+          res.header.should.not.have.property('content-type');
+          done();
+        });
     });
 
     it('should respond 205 with status=205', function(done){
@@ -455,15 +455,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(205)
-      .expect('')
-      .end(function(err, res){
-        if (err) return done(err);
+        .get('/')
+        .expect(205)
+        .expect('')
+        .end(function(err, res){
+          if (err) return done(err);
 
-        res.header.should.not.have.property('content-type');
-        done();
-      });
+          res.header.should.not.have.property('content-type');
+          done();
+        });
     });
 
     it('should respond 304 with status=304', function(done){
@@ -477,15 +477,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(304)
-      .expect('')
-      .end(function(err, res){
-        if (err) return done(err);
+        .get('/')
+        .expect(304)
+        .expect('')
+        .end(function(err, res){
+          if (err) return done(err);
 
-        res.header.should.not.have.property('content-type');
-        done();
-      });
+          res.header.should.not.have.property('content-type');
+          done();
+        });
     });
   });
 
@@ -500,8 +500,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Hello', done);
+        .get('/')
+        .expect('Hello', done);
     });
   });
 
@@ -516,8 +516,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Hello', done);
+        .get('/')
+        .expect('Hello', done);
     });
   });
 
@@ -533,15 +533,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Content-Type', 'application/json; charset=utf-8')
-      .end(function(err, res){
-        if (err) return done(err);
-        const pkg = require('../../package');
-        res.should.not.have.header('Content-Length');
-        res.body.should.eql(pkg);
-        done();
-      });
+        .get('/')
+        .expect('Content-Type', 'application/json; charset=utf-8')
+        .end(function(err, res){
+          if (err) return done(err);
+          const pkg = require('../../package');
+          res.should.not.have.header('Content-Length');
+          res.body.should.eql(pkg);
+          done();
+        });
     });
 
     it('should strip content-length when overwriting', function(done){
@@ -556,15 +556,15 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Content-Type', 'application/json; charset=utf-8')
-      .end(function(err, res){
-        if (err) return done(err);
-        const pkg = require('../../package');
-        res.should.not.have.header('Content-Length');
-        res.body.should.eql(pkg);
-        done();
-      });
+        .get('/')
+        .expect('Content-Type', 'application/json; charset=utf-8')
+        .end(function(err, res){
+          if (err) return done(err);
+          const pkg = require('../../package');
+          res.should.not.have.header('Content-Length');
+          res.body.should.eql(pkg);
+          done();
+        });
     });
 
     it('should keep content-length if not overwritten', function(done){
@@ -579,42 +579,43 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Content-Type', 'application/json; charset=utf-8')
-      .end(function(err, res){
-        if (err) return done(err);
-        const pkg = require('../../package');
-        res.should.have.header('Content-Length');
-        res.body.should.eql(pkg);
-        done();
-      });
+        .get('/')
+        .expect('Content-Type', 'application/json; charset=utf-8')
+        .end(function(err, res){
+          if (err) return done(err);
+          const pkg = require('../../package');
+          res.should.have.header('Content-Length');
+          res.body.should.eql(pkg);
+          done();
+        });
     });
 
-    it('should keep content-length if overwritten with the same stream', function(done){
-      const app = new Koa();
+    it('should keep content-length if overwritten with the same stream',
+      done => {
+        const app = new Koa();
 
-      app.use(function(ctx){
-        ctx.length = fs.readFileSync('package.json').length;
-        const stream = fs.createReadStream('package.json');
-        ctx.body = stream;
-        ctx.body = stream;
-        ctx.set('Content-Type', 'application/json; charset=utf-8');
+        app.use(function(ctx){
+          ctx.length = fs.readFileSync('package.json').length;
+          const stream = fs.createReadStream('package.json');
+          ctx.body = stream;
+          ctx.body = stream;
+          ctx.set('Content-Type', 'application/json; charset=utf-8');
+        });
+
+        const server = app.listen();
+
+        request(server)
+          .get('/')
+          .expect('Content-Type', 'application/json; charset=utf-8')
+          .end(function(err, res){
+            if (err) return done(err);
+            const pkg = require('../../package');
+            res.should.have.header('Content-Length');
+            res.body.should.eql(pkg);
+            done();
+          });
       });
 
-      const server = app.listen();
-
-      request(server)
-      .get('/')
-      .expect('Content-Type', 'application/json; charset=utf-8')
-      .end(function(err, res){
-        if (err) return done(err);
-        const pkg = require('../../package');
-        res.should.have.header('Content-Length');
-        res.body.should.eql(pkg);
-        done();
-      });
-    });
-
     it('should handle errors', function(done){
       const app = new Koa();
 
@@ -626,10 +627,10 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Content-Type', 'text/plain; charset=utf-8')
-      .expect(404)
-      .end(done);
+        .get('/')
+        .expect('Content-Type', 'text/plain; charset=utf-8')
+        .expect(404)
+        .end(done);
     });
 
     it('should handle errors when no content status', function(done){
@@ -643,8 +644,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(204, done);
+        .get('/')
+        .expect(204, done);
     });
 
     it('should handle all intermediate stream body errors', function(done){
@@ -659,8 +660,8 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(404, done);
+        .get('/')
+        .expect(404, done);
     });
   });
 
@@ -675,9 +676,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect('Content-Type', 'application/json; charset=utf-8')
-      .expect('{"hello":"world"}', done);
+        .get('/')
+        .expect('Content-Type', 'application/json; charset=utf-8')
+        .expect('{"hello":"world"}', done);
     });
   });
 
@@ -695,8 +696,8 @@ describe('app.respond', function(){
       });
 
       request(app.listen())
-      .get('/')
-      .end(function(){});
+        .get('/')
+        .end(function(){});
     });
 
     describe('with an .expose property', function(){
@@ -711,9 +712,9 @@ describe('app.respond', function(){
         });
 
         request(app.listen())
-        .get('/')
-        .expect(403, 'sorry!')
-        .end(done);
+          .get('/')
+          .expect(403, 'sorry!')
+          .end(done);
       });
     });
 
@@ -728,9 +729,9 @@ describe('app.respond', function(){
         });
 
         request(app.listen())
-        .get('/')
-        .expect(403, 'Forbidden')
-        .end(done);
+          .get('/')
+          .expect(403, 'Forbidden')
+          .end(done);
       });
     });
 
@@ -744,9 +745,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(500, 'Internal Server Error')
-      .end(done);
+        .get('/')
+        .expect(500, 'Internal Server Error')
+        .end(done);
     });
 
     it('should be catchable', function(done){
@@ -767,9 +768,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(200, 'Got error')
-      .end(done);
+        .get('/')
+        .expect(200, 'Got error')
+        .end(done);
     });
   });
 
@@ -786,9 +787,9 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(200)
-      .expect('hello', done);
+        .get('/')
+        .expect(200)
+        .expect('hello', done);
     });
 
     it('should 204', function(done){
@@ -804,12 +805,12 @@ describe('app.respond', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(204)
-      .end(function(err, res){
-        res.should.not.have.header('content-type');
-        done(err);
-      });
+        .get('/')
+        .expect(204)
+        .end(function(err, res){
+          res.should.not.have.header('content-type');
+          done(err);
+        });
     });
   });
 });
diff --git a/test/application/response.js b/test/application/response.js
index 29b365c..1b5fc08 100644
--- a/test/application/response.js
+++ b/test/application/response.js
@@ -17,8 +17,8 @@ describe('app.response', function(){
     });
 
     request(app1.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 
   it('should not affect the original prototype', function(done){
@@ -28,7 +28,7 @@ describe('app.response', function(){
     });
 
     request(app2.listen())
-    .get('/')
-    .expect(204, done);
+      .get('/')
+      .expect(204, done);
   });
 });
diff --git a/test/application/use.js b/test/application/use.js
index fd7e948..bdda573 100644
--- a/test/application/use.js
+++ b/test/application/use.js
@@ -33,13 +33,13 @@ describe('app.use(fn)', function(){
     const server = app.listen();
 
     request(server)
-    .get('/')
-    .expect(404)
-    .end(function(err){
-      if (err) return done(err);
-      calls.should.eql([1, 2, 3, 4, 5, 6]);
-      done();
-    });
+      .get('/')
+      .expect(404)
+      .end(function(err){
+        if (err) return done(err);
+        calls.should.eql([1, 2, 3, 4, 5, 6]);
+        done();
+      });
   });
 
   // https://github.com/koajs/koa/pull/530#issuecomment-148138051
@@ -51,9 +51,9 @@ describe('app.use(fn)', function(){
     });
 
     request(app.listen())
-    .get('/')
-    .expect(404)
-    .end(done);
+      .get('/')
+      .expect(404)
+      .end(done);
   });
 
   it('should throw error for non function', function(done){
diff --git a/test/context/cookies.js b/test/context/cookies.js
index a8641de..ba3500a 100644
--- a/test/context/cookies.js
+++ b/test/context/cookies.js
@@ -16,16 +16,15 @@ describe('ctx.cookies.set()', function(){
     const server = app.listen();
 
     request(server)
-    .get('/')
-    .expect(204)
-    .end(function(err, res){
-      if (err) return done(err);
+      .get('/')
+      .expect(204)
+      .end(function(err, res){
+        if (err) return done(err);
 
-      res.headers['set-cookie'].some(cookie => /^name=/.test(cookie))
-      .should.be.ok;
+        res.headers['set-cookie'].some(cookie => /^name=/.test(cookie)).should.be.ok;
 
-      done();
-    });
+        done();
+      });
   });
 
   describe('with .signed', function(){
@@ -42,8 +41,8 @@ describe('ctx.cookies.set()', function(){
         });
 
         request(app.listen())
-        .get('/')
-        .expect('.keys required for signed cookies', done);
+          .get('/')
+          .expect('.keys required for signed cookies', done);
       });
     });
 
@@ -60,19 +59,19 @@ describe('ctx.cookies.set()', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(204)
-      .end(function(err, res){
-        if (err) return done(err);
+        .get('/')
+        .expect(204)
+        .end(function(err, res){
+          if (err) return done(err);
 
-        const cookies = res.headers['set-cookie'];
+          const cookies = res.headers['set-cookie'];
 
-        cookies.some(cookie => /^name=/.test(cookie)).should.be.ok;
+          cookies.some(cookie => /^name=/.test(cookie)).should.be.ok;
 
-        cookies.some(cookie => /^name\.sig=/.test(cookie)).should.be.ok;
+          cookies.some(cookie => /^name\.sig=/.test(cookie)).should.be.ok;
 
-        done();
-      });
+          done();
+        });
     });
   });
 });
diff --git a/test/context/onerror.js b/test/context/onerror.js
index b8e66a2..1d5a498 100644
--- a/test/context/onerror.js
+++ b/test/context/onerror.js
@@ -17,11 +17,11 @@ describe('ctx.onerror(err)', function(){
     const server = app.listen();
 
     request(server)
-    .get('/')
-    .expect(418)
-    .expect('Content-Type', 'text/plain; charset=utf-8')
-    .expect('Content-Length', '4')
-    .end(done);
+      .get('/')
+      .expect(418)
+      .expect('Content-Type', 'text/plain; charset=utf-8')
+      .expect('Content-Length', '4')
+      .end(done);
   });
 
   it('should unset all headers', function(done){
@@ -38,18 +38,18 @@ describe('ctx.onerror(err)', function(){
     const server = app.listen();
 
     request(server)
-    .get('/')
-    .expect(418)
-    .expect('Content-Type', 'text/plain; charset=utf-8')
-    .expect('Content-Length', '4')
-    .end(function(err, res){
-      if (err) return done(err);
+      .get('/')
+      .expect(418)
+      .expect('Content-Type', 'text/plain; charset=utf-8')
+      .expect('Content-Length', '4')
+      .end(function(err, res){
+        if (err) return done(err);
 
-      res.headers.should.not.have.property('vary');
-      res.headers.should.not.have.property('x-csrf-token');
+        res.headers.should.not.have.property('vary');
+        res.headers.should.not.have.property('x-csrf-token');
 
-      done();
-    });
+        done();
+      });
   });
 
   describe('when invalid err.status', function(){
@@ -67,10 +67,10 @@ describe('ctx.onerror(err)', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(500)
-        .expect('Content-Type', 'text/plain; charset=utf-8')
-        .expect('Internal Server Error', done);
+          .get('/')
+          .expect(500)
+          .expect('Content-Type', 'text/plain; charset=utf-8')
+          .expect('Internal Server Error', done);
       });
     });
 
@@ -88,10 +88,10 @@ describe('ctx.onerror(err)', function(){
         const server = app.listen();
 
         request(server)
-        .get('/')
-        .expect(500)
-        .expect('Content-Type', 'text/plain; charset=utf-8')
-        .expect('Internal Server Error', done);
+          .get('/')
+          .expect(500)
+          .expect('Content-Type', 'text/plain; charset=utf-8')
+          .expect('Internal Server Error', done);
       });
     });
   });
@@ -107,10 +107,10 @@ describe('ctx.onerror(err)', function(){
       const server = app.listen();
 
       request(server)
-      .get('/')
-      .expect(500)
-      .expect('Content-Type', 'text/plain; charset=utf-8')
-      .expect('Internal Server Error', done);
+        .get('/')
+        .expect(500)
+        .expect('Content-Type', 'text/plain; charset=utf-8')
+        .expect('Internal Server Error', done);
     });
   });
 });
diff --git a/test/context/state.js b/test/context/state.js
index b6bea98..27ee167 100644
--- a/test/context/state.js
+++ b/test/context/state.js
@@ -16,8 +16,8 @@ describe('ctx.state', function(){
     const server = app.listen();
 
     request(server)
-    .get('/')
-    .expect(404)
-    .end(done);
+      .get('/')
+      .expect(404)
+      .end(done);
   });
 });
diff --git a/test/response/attachment.js b/test/response/attachment.js
index 38d393e..b14530e 100644
--- a/test/response/attachment.js
+++ b/test/response/attachment.js
@@ -40,10 +40,10 @@ describe('ctx.attachment([filename])', function(){
       });
 
       request(app.listen())
-      .get('/')
-      .expect('content-disposition', 'attachment; filename="include-no-ascii-char-???-ok.json"; filename*=UTF-8\'\'include-no-ascii-char-%E4%B8%AD%E6%96%87%E5%90%8D-ok.json')
-      .expect({foo: 'bar'})
-      .expect(200, done);
+        .get('/')
+        .expect('content-disposition', 'attachment; filename="include-no-ascii-char-???-ok.json"; filename*=UTF-8\'\'include-no-ascii-char-%E4%B8%AD%E6%96%87%E5%90%8D-ok.json')
+        .expect({foo: 'bar'})
+        .expect(200, done);
     });
   });
 });
diff --git a/test/response/last-modified.js b/test/response/last-modified.js
index e008d68..0b276cd 100644
--- a/test/response/last-modified.js
+++ b/test/response/last-modified.js
@@ -23,8 +23,7 @@ describe('res.lastModified', function(){
     const res = response();
     const date = new Date();
     res.lastModified = date;
-    (res.lastModified.getTime() / 1000)
-    .should.equal(Math.floor(date.getTime() / 1000));
+    (res.lastModified.getTime() / 1000).should.equal(Math.floor(date.getTime() / 1000));
   });
 
   describe('when lastModified not set', function(){
diff --git a/test/response/status.js b/test/response/status.js
index b00b2b6..bd717a1 100644
--- a/test/response/status.js
+++ b/test/response/status.js
@@ -85,7 +85,7 @@ describe('res.status=', function(){
         });
     });
 
-    it('should strip content releated header fields after status set', function(done){
+    it('should strip content releated header fields after status set', done => {
       const app = new Koa();
 
       app.use(function(ctx){