[RuntimeException] Call to undefined method UnitTester::haveRecord

<?php namespace Article;
 use AppArticle;
 use FakerFactory as Faker;
 use CarbonCarbon;
 class SaveTest extends CodeceptionTestUnit
{
/**
 * @var UnitTester
 */
protected $tester;

protected function _before()
{
}

protected function _after()
{
}

// tests
public function testSomeFeature()
{
    $faker= Faker::create('App/Article');

        $title = $faker->sentence;
        $content = implode($faker->paragraphs(5));
        $created_at = Carbon::now();
        $updated_at = Carbon::now();


        $this->tester->haveRecord( 'Article',   ['title' => $title, 'content' => $content,'created_at' => $created_at,'updated_at' => $updated_at]);


         $this->tester->seeRecord('articles',['title' => $title,'content' => $content,'created_at' => $created_at,'updated_at' => $updated_at]);




}
}

actor: UnitTester
modules:
 enabled:
    - Asserts
    - Laravel5:
        part: ORM
    - HelperUnit