diff --git a/test/app.engine.js b/test/app.engine.js
index b198292fa0..0d54c90d56 100644
--- a/test/app.engine.js
+++ b/test/app.engine.js
@@ -1,4 +1,5 @@
 
+var assert = require('assert')
 var express = require('../')
   , fs = require('fs');
 var path = require('path')
@@ -22,16 +23,16 @@ describe('app', function(){
 
       app.render('user.html', function(err, str){
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
 
     it('should throw when the callback is missing', function(){
       var app = express();
-      (function(){
+      assert.throws(function () {
         app.engine('.html', null);
-      }).should.throw('callback function required');
+      }, /callback function required/)
     })
 
     it('should work without leading "."', function(done){
@@ -43,7 +44,7 @@ describe('app', function(){
 
       app.render('user.html', function(err, str){
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -58,7 +59,7 @@ describe('app', function(){
 
       app.render('user', function(err, str){
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -73,7 +74,7 @@ describe('app', function(){
 
       app.render('user', function(err, str){
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
diff --git a/test/app.js b/test/app.js
index e52365c36b..d0756795d3 100644
--- a/test/app.js
+++ b/test/app.js
@@ -32,8 +32,8 @@ describe('app.parent', function(){
     blog.use('/admin', blogAdmin);
 
     assert(!app.parent, 'app.parent');
-    blog.parent.should.equal(app);
-    blogAdmin.parent.should.equal(blog);
+    assert.strictEqual(blog.parent, app)
+    assert.strictEqual(blogAdmin.parent, blog)
   })
 })
 
@@ -48,10 +48,10 @@ describe('app.mountpath', function(){
     app.use(fallback);
     blog.use('/admin', admin);
 
-    admin.mountpath.should.equal('/admin');
-    app.mountpath.should.equal('/');
-    blog.mountpath.should.equal('/blog');
-    fallback.mountpath.should.equal('/');
+    assert.strictEqual(admin.mountpath, '/admin')
+    assert.strictEqual(app.mountpath, '/')
+    assert.strictEqual(blog.mountpath, '/blog')
+    assert.strictEqual(fallback.mountpath, '/')
   })
 })
 
@@ -76,9 +76,9 @@ describe('app.path()', function(){
     app.use('/blog', blog);
     blog.use('/admin', blogAdmin);
 
-    app.path().should.equal('');
-    blog.path().should.equal('/blog');
-    blogAdmin.path().should.equal('/blog/admin');
+    assert.strictEqual(app.path(), '')
+    assert.strictEqual(blog.path(), '/blog')
+    assert.strictEqual(blogAdmin.path(), '/blog/admin')
   })
 })
 
@@ -86,7 +86,7 @@ describe('in development', function(){
   it('should disable "view cache"', function(){
     process.env.NODE_ENV = 'development';
     var app = express();
-    app.enabled('view cache').should.be.false()
+    assert.ok(!app.enabled('view cache'))
     process.env.NODE_ENV = 'test';
   })
 })
@@ -95,7 +95,7 @@ describe('in production', function(){
   it('should enable "view cache"', function(){
     process.env.NODE_ENV = 'production';
     var app = express();
-    app.enabled('view cache').should.be.true()
+    assert.ok(app.enabled('view cache'))
     process.env.NODE_ENV = 'test';
   })
 })
@@ -104,7 +104,7 @@ describe('without NODE_ENV', function(){
   it('should default to development', function(){
     process.env.NODE_ENV = '';
     var app = express();
-    app.get('env').should.equal('development');
+    assert.strictEqual(app.get('env'), 'development')
     process.env.NODE_ENV = 'test';
   })
 })
diff --git a/test/app.locals.js b/test/app.locals.js
index d8bfb5a987..0b14ac9070 100644
--- a/test/app.locals.js
+++ b/test/app.locals.js
@@ -1,16 +1,18 @@
 
+var assert = require('assert')
 var express = require('../')
+var should = require('should')
 
 describe('app', function(){
   describe('.locals(obj)', function(){
     it('should merge locals', function(){
       var app = express();
-      Object.keys(app.locals).should.eql(['settings']);
+      should(Object.keys(app.locals)).eql(['settings'])
       app.locals.user = 'tobi';
       app.locals.age = 2;
-      Object.keys(app.locals).should.eql(['settings', 'user', 'age']);
-      app.locals.user.should.equal('tobi');
-      app.locals.age.should.equal(2);
+      should(Object.keys(app.locals)).eql(['settings', 'user', 'age'])
+      assert.strictEqual(app.locals.user, 'tobi')
+      assert.strictEqual(app.locals.age, 2)
     })
   })
 
@@ -19,8 +21,8 @@ describe('app', function(){
       var app = express();
       app.set('title', 'House of Manny');
       var obj = app.locals.settings;
-      obj.should.have.property('env', 'test');
-      obj.should.have.property('title', 'House of Manny');
+      should(obj).have.property('env', 'test')
+      should(obj).have.property('title', 'House of Manny')
     })
   })
 })
diff --git a/test/app.param.js b/test/app.param.js
index 577b00710b..7dbe3ffb61 100644
--- a/test/app.param.js
+++ b/test/app.param.js
@@ -1,4 +1,5 @@
 
+var assert = require('assert')
 var express = require('../')
   , request = require('supertest');
 
@@ -40,7 +41,7 @@ describe('app', function(){
 
     it('should fail if not given fn', function(){
       var app = express();
-      app.param.bind(app, ':name', 'bob').should.throw();
+      assert.throws(app.param.bind(app, ':name', 'bob'))
     })
   })
 
@@ -57,24 +58,22 @@ describe('app', function(){
 
       app.get('/post/:id', function(req, res){
         var id = req.params.id;
-        id.should.be.a.Number()
-        res.send('' + id);
+        res.send((typeof id) + ':' + id)
       });
 
       app.get('/user/:uid', function(req, res){
         var id = req.params.id;
-        id.should.be.a.Number()
-        res.send('' + id);
+        res.send((typeof id) + ':' + id)
       });
 
       request(app)
-      .get('/user/123')
-      .expect(200, '123', function (err) {
-        if (err) return done(err)
-        request(app)
-        .get('/post/123')
-        .expect('123', done);
-      })
+        .get('/user/123')
+        .expect(200, 'number:123', function (err) {
+          if (err) return done(err)
+          request(app)
+            .get('/post/123')
+            .expect('number:123', done)
+        })
     })
   })
 
@@ -91,13 +90,12 @@ describe('app', function(){
 
       app.get('/user/:id', function(req, res){
         var id = req.params.id;
-        id.should.be.a.Number()
-        res.send('' + id);
+        res.send((typeof id) + ':' + id)
       });
 
       request(app)
-      .get('/user/123')
-      .expect('123', done);
+        .get('/user/123')
+        .expect(200, 'number:123', done)
     })
 
     it('should only call once per request', function(done) {
diff --git a/test/app.render.js b/test/app.render.js
index 54f6c2ca82..d0b367189b 100644
--- a/test/app.render.js
+++ b/test/app.render.js
@@ -13,7 +13,7 @@ describe('app', function(){
 
       app.render(path.join(__dirname, 'fixtures', 'user.tmpl'), function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -26,7 +26,7 @@ describe('app', function(){
 
       app.render(path.join(__dirname, 'fixtures', 'user'), function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -39,7 +39,7 @@ describe('app', function(){
 
       app.render('user.tmpl', function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -52,7 +52,7 @@ describe('app', function(){
 
       app.render('blog/post', function (err, str) {
         if (err) return done(err);
-        str.should.equal('<h1>blog post</h1>');
+        assert.strictEqual(str, '<h1>blog post</h1>')
         done();
       })
     })
@@ -72,8 +72,8 @@ describe('app', function(){
       app.set('view', View);
 
       app.render('something', function(err, str){
-        err.should.be.ok()
-        err.message.should.equal('err!');
+        assert.ok(err)
+        assert.strictEqual(err.message, 'err!')
         done();
       })
     })
@@ -113,7 +113,7 @@ describe('app', function(){
 
         app.render('email.tmpl', function (err, str) {
           if (err) return done(err);
-          str.should.equal('<p>This is an email</p>');
+          assert.strictEqual(str, '<p>This is an email</p>')
           done();
         })
       })
@@ -128,7 +128,7 @@ describe('app', function(){
 
         app.render('email', function(err, str){
           if (err) return done(err);
-          str.should.equal('<p>This is an email</p>');
+          assert.strictEqual(str, '<p>This is an email</p>')
           done();
         })
       })
@@ -143,7 +143,7 @@ describe('app', function(){
 
         app.render('user.tmpl', function (err, str) {
           if (err) return done(err);
-          str.should.equal('<p>tobi</p>');
+          assert.strictEqual(str, '<p>tobi</p>')
           done();
         })
       })
@@ -161,7 +161,7 @@ describe('app', function(){
 
           app.render('user.tmpl', function (err, str) {
             if (err) return done(err);
-            str.should.equal('<span>tobi</span>');
+            assert.strictEqual(str, '<span>tobi</span>')
             done();
           })
         })
@@ -178,7 +178,7 @@ describe('app', function(){
 
           app.render('name.tmpl', function (err, str) {
             if (err) return done(err);
-            str.should.equal('<p>tobi</p>');
+            assert.strictEqual(str, '<p>tobi</p>')
             done();
           })
         })
@@ -219,7 +219,7 @@ describe('app', function(){
 
         app.render('something', function(err, str){
           if (err) return done(err);
-          str.should.equal('abstract engine');
+          assert.strictEqual(str, 'abstract engine')
           done();
         })
       })
@@ -245,12 +245,12 @@ describe('app', function(){
 
         app.render('something', function(err, str){
           if (err) return done(err);
-          count.should.equal(1);
-          str.should.equal('abstract engine');
+          assert.strictEqual(count, 1)
+          assert.strictEqual(str, 'abstract engine')
           app.render('something', function(err, str){
             if (err) return done(err);
-            count.should.equal(2);
-            str.should.equal('abstract engine');
+            assert.strictEqual(count, 2)
+            assert.strictEqual(str, 'abstract engine')
             done();
           })
         })
@@ -275,12 +275,12 @@ describe('app', function(){
 
         app.render('something', function(err, str){
           if (err) return done(err);
-          count.should.equal(1);
-          str.should.equal('abstract engine');
+          assert.strictEqual(count, 1)
+          assert.strictEqual(str, 'abstract engine')
           app.render('something', function(err, str){
             if (err) return done(err);
-            count.should.equal(1);
-            str.should.equal('abstract engine');
+            assert.strictEqual(count, 1)
+            assert.strictEqual(str, 'abstract engine')
             done();
           })
         })
@@ -298,7 +298,7 @@ describe('app', function(){
 
       app.render('user.tmpl', { user: user }, function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -311,7 +311,7 @@ describe('app', function(){
 
       app.render('user.tmpl', {}, function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>tobi</p>');
+        assert.strictEqual(str, '<p>tobi</p>')
         done();
       })
     })
@@ -325,7 +325,7 @@ describe('app', function(){
 
       app.render('user.tmpl', { user: jane }, function (err, str) {
         if (err) return done(err);
-        str.should.equal('<p>jane</p>');
+        assert.strictEqual(str, '<p>jane</p>')
         done();
       })
     })
@@ -350,12 +350,12 @@ describe('app', function(){
 
         app.render('something', {cache: true}, function(err, str){
           if (err) return done(err);
-          count.should.equal(1);
-          str.should.equal('abstract engine');
+          assert.strictEqual(count, 1)
+          assert.strictEqual(str, 'abstract engine')
           app.render('something', {cache: true}, function(err, str){
             if (err) return done(err);
-            count.should.equal(1);
-            str.should.equal('abstract engine');
+            assert.strictEqual(count, 1)
+            assert.strictEqual(str, 'abstract engine')
             done();
           })
         })
diff --git a/test/app.router.js b/test/app.router.js
index a4fe57cc2b..6edb93d6ea 100644
--- a/test/app.router.js
+++ b/test/app.router.js
@@ -51,7 +51,7 @@ describe('app.router', function(){
 
       it('should reject numbers for app.' + method, function(){
         var app = express();
-        app[method].bind(app, '/', 3).should.throw(/Number/);
+        assert.throws(app[method].bind(app, '/', 3), /Number/)
       })
     });
 
@@ -1102,6 +1102,6 @@ describe('app.router', function(){
 
   it('should be chainable', function(){
     var app = express();
-    app.get('/', function(){}).should.equal(app);
+    assert.strictEqual(app.get('/', function () {}), app)
   })
 })
diff --git a/test/app.routes.error.js b/test/app.routes.error.js
index cbbc23ef57..b1f95d0d6e 100644
--- a/test/app.routes.error.js
+++ b/test/app.routes.error.js
@@ -1,3 +1,5 @@
+
+var assert = require('assert')
 var express = require('../')
   , request = require('supertest');
 
@@ -34,20 +36,20 @@ describe('app', function(){
         next();
       }, function(err, req, res, next){
         b = true;
-        err.message.should.equal('fabricated error');
+        assert.strictEqual(err.message, 'fabricated error')
         next(err);
       }, function(err, req, res, next){
         c = true;
-        err.message.should.equal('fabricated error');
+        assert.strictEqual(err.message, 'fabricated error')
         next();
       }, function(err, req, res, next){
         d = true;
         next();
       }, function(req, res){
-        a.should.be.false()
-        b.should.be.true()
-        c.should.be.true()
-        d.should.be.false()
+        assert.ok(!a)
+        assert.ok(b)
+        assert.ok(c)
+        assert.ok(!d)
         res.send(204);
       });
 
diff --git a/test/app.use.js b/test/app.use.js
index 347937fbb3..7987405a8b 100644
--- a/test/app.use.js
+++ b/test/app.use.js
@@ -10,7 +10,7 @@ describe('app', function(){
       , app = express();
 
     blog.on('mount', function(arg){
-      arg.should.equal(app);
+      assert.strictEqual(arg, app)
       done();
     });
 
@@ -63,7 +63,7 @@ describe('app', function(){
         , app = express();
 
       app.use('/blog', blog);
-      blog.parent.should.equal(app);
+      assert.strictEqual(blog.parent, app)
     })
 
     it('should support dynamic routes', function(done){
@@ -102,11 +102,11 @@ describe('app', function(){
       });
 
       blog.once('mount', function (parent) {
-        parent.should.equal(app);
+        assert.strictEqual(parent, app)
         cb();
       });
       other.once('mount', function (parent) {
-        parent.should.equal(app);
+        assert.strictEqual(parent, app)
         cb();
       });
 
diff --git a/test/req.query.js b/test/req.query.js
index 0e810b8ef9..f3e8df8a18 100644
--- a/test/req.query.js
+++ b/test/req.query.js
@@ -1,4 +1,5 @@
 
+var assert = require('assert')
 var express = require('../')
   , request = require('supertest');
 
@@ -99,7 +100,8 @@ describe('req', function(){
 
     describe('when "query parser" an unknown value', function () {
       it('should throw', function () {
-        createApp.bind(null, 'bogus').should.throw(/unknown value.*query parser/);
+        assert.throws(createApp.bind(null, 'bogus'),
+          /unknown value.*query parser/)
       });
     });
   })
diff --git a/test/req.route.js b/test/req.route.js
index 2947b7c3d0..b32d470bd6 100644
--- a/test/req.route.js
+++ b/test/req.route.js
@@ -8,18 +8,20 @@ describe('req', function(){
       var app = express();
 
       app.get('/user/:id/:op?', function(req, res, next){
-        req.route.path.should.equal('/user/:id/:op?');
+        res.header('path-1', req.route.path)
         next();
       });
 
       app.get('/user/:id/edit', function(req, res){
-        req.route.path.should.equal('/user/:id/edit');
+        res.header('path-2', req.route.path)
         res.end();
       });
 
       request(app)
-      .get('/user/12/edit')
-      .expect(200, done);
+        .get('/user/12/edit')
+        .expect('path-1', '/user/:id/:op?')
+        .expect('path-2', '/user/:id/edit')
+        .expect(200, done)
     })
   })
 })
diff --git a/test/req.xhr.js b/test/req.xhr.js
index 94af9170cb..3ad1c6fb72 100644
--- a/test/req.xhr.js
+++ b/test/req.xhr.js
@@ -4,59 +4,38 @@ var express = require('../')
 
 describe('req', function(){
   describe('.xhr', function(){
-    it('should return true when X-Requested-With is xmlhttprequest', function(done){
-      var app = express();
-
-      app.use(function(req, res){
-        req.xhr.should.be.true()
-        res.end();
-      });
+    before(function () {
+      this.app = express()
+      this.app.get('/', function (req, res) {
+        res.send(req.xhr)
+      })
+    })
 
-      request(app)
-      .get('/')
-      .set('X-Requested-With', 'xmlhttprequest')
-      .expect(200, done)
+    it('should return true when X-Requested-With is xmlhttprequest', function(done){
+      request(this.app)
+        .get('/')
+        .set('X-Requested-With', 'xmlhttprequest')
+        .expect(200, 'true', done)
     })
 
     it('should case-insensitive', function(done){
-      var app = express();
-
-      app.use(function(req, res){
-        req.xhr.should.be.true()
-        res.end();
-      });
-
-      request(app)
-      .get('/')
-      .set('X-Requested-With', 'XMLHttpRequest')
-      .expect(200, done)
+      request(this.app)
+        .get('/')
+        .set('X-Requested-With', 'XMLHttpRequest')
+        .expect(200, 'true', done)
     })
 
     it('should return false otherwise', function(done){
-      var app = express();
-
-      app.use(function(req, res){
-        req.xhr.should.be.false()
-        res.end();
-      });
-
-      request(app)
-      .get('/')
-      .set('X-Requested-With', 'blahblah')
-      .expect(200, done)
+      request(this.app)
+        .get('/')
+        .set('X-Requested-With', 'blahblah')
+        .expect(200, 'false', done)
     })
 
     it('should return false when not present', function(done){
-      var app = express();
-
-      app.use(function(req, res){
-        req.xhr.should.be.false()
-        res.end();
-      });
-
-      request(app)
-      .get('/')
-      .expect(200, done)
+      request(this.app)
+        .get('/')
+        .expect(200, 'false', done)
     })
   })
 })
diff --git a/test/res.cookie.js b/test/res.cookie.js
index d8e6b7ca85..8f8662c217 100644
--- a/test/res.cookie.js
+++ b/test/res.cookie.js
@@ -1,7 +1,6 @@
 
 var express = require('../')
   , request = require('supertest')
-  , cookie = require('cookie')
   , cookieParser = require('cookie-parser')
 var merge = require('utils-merge');
 
@@ -46,12 +45,9 @@ describe('res', function(){
       });
 
       request(app)
-      .get('/')
-      .end(function(err, res){
-        var val = ['name=tobi; Path=/', 'age=1; Path=/', 'gender=%3F; Path=/'];
-        res.headers['set-cookie'].should.eql(val);
-        done();
-      })
+        .get('/')
+        .expect('Set-Cookie', 'name=tobi; Path=/,age=1; Path=/,gender=%3F; Path=/')
+        .expect(200, done)
     })
   })
 
@@ -80,11 +76,9 @@ describe('res', function(){
         });
 
         request(app)
-        .get('/')
-        .end(function(err, res){
-          res.headers['set-cookie'][0].should.not.containEql('Thu, 01 Jan 1970 00:00:01 GMT');
-          done();
-        })
+          .get('/')
+          .expect('Set-Cookie', /name=tobi; Max-Age=1; Path=\/; Expires=/)
+          .expect(200, done)
       })
 
       it('should set max-age', function(done){
@@ -141,13 +135,9 @@ describe('res', function(){
         });
 
         request(app)
-        .get('/')
-        .end(function(err, res){
-          var val = res.headers['set-cookie'][0];
-          val = cookie.parse(val.split('.')[0]);
-          val.user.should.equal('s:j:{"name":"tobi"}');
-          done();
-        })
+          .get('/')
+          .expect('Set-Cookie', 'user=s%3Aj%3A%7B%22name%22%3A%22tobi%22%7D.K20xcwmDS%2BPb1rsD95o5Jm5SqWs1KteqdnynnB7jkTE; Path=/')
+          .expect(200, done)
       })
     })
 
diff --git a/test/res.send.js b/test/res.send.js
index b836b5e4dc..e62caf95dc 100644
--- a/test/res.send.js
+++ b/test/res.send.js
@@ -544,7 +544,7 @@ describe('res', function(){
           var chunk = !Buffer.isBuffer(body)
             ? Buffer.from(body, encoding)
             : body;
-          chunk.toString().should.equal('hello, world!');
+          assert.strictEqual(chunk.toString(), 'hello, world!')
           return '"custom"';
         });
 
diff --git a/test/utils.js b/test/utils.js
index b51d223af9..a0fac7a722 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -1,27 +1,28 @@
 
 var assert = require('assert');
 var Buffer = require('safe-buffer').Buffer
+var should = require('should')
 var utils = require('../lib/utils');
 
 describe('utils.etag(body, encoding)', function(){
   it('should support strings', function(){
-    utils.etag('express!')
-    .should.eql('"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
+    assert.strictEqual(utils.etag('express!'),
+      '"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
   })
 
   it('should support utf8 strings', function(){
-    utils.etag('express❤', 'utf8')
-    .should.eql('"a-JBiXf7GyzxwcrxY4hVXUwa7tmks"')
+    assert.strictEqual(utils.etag('express❤', 'utf8'),
+      '"a-JBiXf7GyzxwcrxY4hVXUwa7tmks"')
   })
 
   it('should support buffer', function(){
-    utils.etag(Buffer.from('express!'))
-    .should.eql('"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
+    assert.strictEqual(utils.etag(Buffer.from('express!')),
+      '"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
   })
 
   it('should support empty string', function(){
-    utils.etag('')
-    .should.eql('"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
+    assert.strictEqual(utils.etag(''),
+      '"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
   })
 })
 
@@ -49,23 +50,23 @@ describe('utils.setCharset(type, charset)', function () {
 
 describe('utils.wetag(body, encoding)', function(){
   it('should support strings', function(){
-    utils.wetag('express!')
-    .should.eql('W/"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
+    assert.strictEqual(utils.wetag('express!'),
+      'W/"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
   })
 
   it('should support utf8 strings', function(){
-    utils.wetag('express❤', 'utf8')
-    .should.eql('W/"a-JBiXf7GyzxwcrxY4hVXUwa7tmks"')
+    assert.strictEqual(utils.wetag('express❤', 'utf8'),
+      'W/"a-JBiXf7GyzxwcrxY4hVXUwa7tmks"')
   })
 
   it('should support buffer', function(){
-    utils.wetag(Buffer.from('express!'))
-    .should.eql('W/"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
+    assert.strictEqual(utils.wetag(Buffer.from('express!')),
+      'W/"8-O2uVAFaQ1rZvlKLT14RnuvjPIdg"')
   })
 
   it('should support empty string', function(){
-    utils.wetag('')
-    .should.eql('W/"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
+    assert.strictEqual(utils.wetag(''),
+      'W/"0-2jmj7l5rSw0yVb/vlWAYkK/YBwk"')
   })
 })
 
@@ -89,7 +90,7 @@ describe('utils.isAbsolute()', function(){
 describe('utils.flatten(arr)', function(){
   it('should flatten an array', function(){
     var arr = ['one', ['two', ['three', 'four'], 'five']];
-    utils.flatten(arr)
-      .should.eql(['one', 'two', 'three', 'four', 'five']);
+    should(utils.flatten(arr))
+      .eql(['one', 'two', 'three', 'four', 'five'])
   })
 })