Fix unit test

test/associations/has-many.test.js

@@ -985,8 +985,7 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
         User.hasMany(Task)
         User.hasMany(Task)
         Task.hasMany(User)
         Task.hasMany(User)
 
 
-        User.sync({ force: true }).success(function () {
-          Task.sync({ force: true }).success(function () {
+        this.sequelize.sync({ force: true }).success(function () {
           User.create({ username: 'foo' }).success(function (user) {
           User.create({ username: 'foo' }).success(function (user) {
             Task.create({ title: 'task' }).success(function (task) {
             Task.create({ title: 'task' }).success(function (task) {
               task.setUsers([ user ]).success(function () {
               task.setUsers([ user ]).success(function () {
@@ -1004,7 +1003,6 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
           })
           })
         })
         })
       })
       })
-      })
 
 
       it("joins an association with custom primary keys", function(done) {
       it("joins an association with custom primary keys", function(done) {
         var Group = this.sequelize.define('group', {
         var Group = this.sequelize.define('group', {