diff --git a/test/install.js b/test/install.js
index 069e6aa0..32b10967 100644
--- a/test/install.js
+++ b/test/install.js
@@ -2,7 +2,6 @@
 'use strict';
 var yeoman = require('yeoman-environment');
 var generators = require('..');
-var assert = generators.assert;
 var helpers = generators.test;
 var TestAdapter = require('../lib/test/adapter').TestAdapter;
 var sinon = require('sinon');
@@ -36,44 +35,44 @@ describe('generators.Base (actions/install mixin)', function () {
       };
       //args: installer, paths, options, cb
       this.dummy.runInstall('nestedScript', ['path1', 'path2'], spawnEnv, done);
-      assert.ok(this.spawnCommandStub.calledWithExactly('nestedScript', ['install', 'path1', 'path2'], spawnEnv));
+      sinon.assert.calledWithExactly(this.spawnCommandStub, 'nestedScript', ['install', 'path1', 'path2'], spawnEnv);
     });
   });
 
   describe('#bowerInstall()', function () {
     it('spawn a bower process', function (done) {
       this.dummy.bowerInstall(null, done);
-      assert.ok(this.spawnCommandStub.calledOnce);
-      assert.ok(this.spawnCommandStub.calledWithExactly('bower', ['install'], {}));
+      sinon.assert.calledOnce(this.spawnCommandStub);
+      sinon.assert.calledWithExactly(this.spawnCommandStub, 'bower', ['install'], {});
     });
 
     it('spawn a bower process with formatted options', function (done) {
       this.dummy.bowerInstall('jquery', { saveDev: true }, done);
-      assert.ok(this.spawnCommandStub.calledOnce);
-      assert.ok(this.spawnCommandStub.calledWithExactly('bower', ['install', 'jquery', '--save-dev'], { saveDev: true }));
+      sinon.assert.calledOnce(this.spawnCommandStub);
+      sinon.assert.calledWithExactly(this.spawnCommandStub, 'bower', ['install', 'jquery', '--save-dev'], { saveDev: true });
     });
   });
 
   describe('#npmInstall()', function () {
     it('run without callback', function () {
       this.dummy.npmInstall('yo', { save: true });
-      assert.ok(this.spawnCommandStub.calledOnce);
+      sinon.assert.calledOnce(this.spawnCommandStub);
     });
   });
 
   describe('#installDependencies()', function () {
     it('spawn npm and bower', function (done) {
       this.dummy.installDependencies(function () {
-        assert.ok(this.spawnCommandStub.firstCall.calledWithExactly('bower', ['install'], {}));
-        assert.ok(this.spawnCommandStub.secondCall.calledWithExactly('npm', ['install'], {}));
-
+        sinon.assert.calledTwice(this.spawnCommandStub);
+        sinon.assert.calledWithExactly(this.spawnCommandStub, 'bower', ['install'], {});
+        sinon.assert.calledWithExactly(this.spawnCommandStub, 'npm', ['install'], {});
         done();
       }.bind(this));
     });
 
     it('doesn\'t spawn anything with skipInstall', function () {
       this.dummy.installDependencies({ skipInstall: true });
-      assert.equal(this.spawnCommandStub.callCount, 0);
+      sinon.assert.notCalled(this.spawnCommandStub);
     });
 
     it('call callback if skipInstall', function (done) {