diff --git a/tests/unit/data/ar/Customer.php b/tests/unit/data/ar/Customer.php
index bbc018278d..d4702b12c9 100644
--- a/tests/unit/data/ar/Customer.php
+++ b/tests/unit/data/ar/Customer.php
@@ -1,8 +1,6 @@
 <?php
 namespace yiiunit\data\ar;
 
-use yii\db\ActiveQuery;
-
 /**
  * Class Customer
  *
diff --git a/tests/unit/data/validators/models/ValidatorTestMainModel.php b/tests/unit/data/validators/models/ValidatorTestMainModel.php
index 6f2808b676..00f977b761 100644
--- a/tests/unit/data/validators/models/ValidatorTestMainModel.php
+++ b/tests/unit/data/validators/models/ValidatorTestMainModel.php
@@ -3,7 +3,7 @@
 namespace yiiunit\data\validators\models;
 
 
-use yii\db\ActiveRecord;
+use yiiunit\data\ar\ActiveRecord;
 
 class ValidatorTestMainModel extends ActiveRecord
 {
diff --git a/tests/unit/data/validators/models/ValidatorTestRefModel.php b/tests/unit/data/validators/models/ValidatorTestRefModel.php
index aa3d19930d..fc4019da58 100644
--- a/tests/unit/data/validators/models/ValidatorTestRefModel.php
+++ b/tests/unit/data/validators/models/ValidatorTestRefModel.php
@@ -3,7 +3,7 @@
 namespace yiiunit\data\validators\models;
 
 
-use yii\db\ActiveRecord;
+use yiiunit\data\ar\ActiveRecord;
 
 class ValidatorTestRefModel extends ActiveRecord
 {
diff --git a/tests/unit/framework/validators/ExistValidatorTest.php b/tests/unit/framework/validators/ExistValidatorTest.php
index ea819312e2..0df42e314c 100644
--- a/tests/unit/framework/validators/ExistValidatorTest.php
+++ b/tests/unit/framework/validators/ExistValidatorTest.php
@@ -13,7 +13,6 @@ use yiiunit\framework\db\DatabaseTestCase;
 
 class ExistValidatorTest extends DatabaseTestCase
 {
-	protected $initializeAppWithDb = true;
 	protected $driverName = 'mysql';
 
 	public function setUp()
diff --git a/tests/unit/framework/validators/UniqueValidatorTest.php b/tests/unit/framework/validators/UniqueValidatorTest.php
index 1142fe0264..a39ee41f7b 100644
--- a/tests/unit/framework/validators/UniqueValidatorTest.php
+++ b/tests/unit/framework/validators/UniqueValidatorTest.php
@@ -14,7 +14,6 @@ use yiiunit\TestCase;
 
 class UniqueValidatorTest extends DatabaseTestCase
 {
-	protected $initializeAppWithDb = true;
 	protected $driverName = 'mysql';
 
 	public function setUp()