Codeception not get data from child class

I am working in Yii2 advance templete. I am writing a unit test using codeception I have model common\models\Member. From member i inherit a child model superviser

Now i want to grab data from superviser Model but it give me empty array

 $model= $this->tester->grabRecord('common\models\Superviser ', array('' => 8));


Do you have fixtures set up?

Yes i have

public function _fixtures() {
return [
‘user’ => [
‘class’ => UserFixture::className(),
‘member’ => [
‘class’ => MemberFixture::className(),
‘supervioser’ => [
‘class’ => SupervioserFixture::className(),

@samdark @SilverFire