diff --git a/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorPostgresTest.php b/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorPostgresTest.php
new file mode 100644
index 0000000..9adc57c
--- /dev/null
+++ b/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorPostgresTest.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace yiiunit\framework\validators\UniqueValidatorDriverTests;
+
+
+use yiiunit\framework\validators\UniqueValidatorTest;
+
+class UniqueValidatorPostgresTest extends UniqueValidatorTest
+{
+	protected $driverName = 'pgsql';
+}
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diff --git a/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorSQliteTest.php b/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorSQliteTest.php
new file mode 100644
index 0000000..9263404
--- /dev/null
+++ b/tests/unit/framework/validators/UniqueValidatorDriverTests/UniqueValidatorSQliteTest.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace yiiunit\framework\validators\UniqueValidatorDriverTests;
+
+
+use yiiunit\framework\validators\UniqueValidatorTest;
+
+class UniqueValidatorSQliteTest extends UniqueValidatorTest
+{
+	protected $driverName = 'sqlite';
+}
\ No newline at end of file
diff --git a/tests/unit/framework/validators/UniqueValidatorTest.php b/tests/unit/framework/validators/UniqueValidatorTest.php
new file mode 100644
index 0000000..325a15c
--- /dev/null
+++ b/tests/unit/framework/validators/UniqueValidatorTest.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace yiiunit\framework\validators;
+
+
+use yii\validators\UniqueValidator;
+use Yii;
+use yiiunit\data\ar\ActiveRecord;
+use yiiunit\data\validators\models\FakedValidationModel;
+use yiiunit\data\validators\models\ValidatorTestMainModel;
+use yiiunit\data\validators\models\ValidatorTestRefModel;
+use yiiunit\framework\db\DatabaseTestCase;
+use yiiunit\TestCase;
+
+class UniqueValidatorTest extends DatabaseTestCase
+{
+	protected $initializeAppWithDb = true;
+	protected $driverName = 'mysql';
+
+	public function setUp()
+	{
+		parent::setUp();
+		ActiveRecord::$db = Yii::$app->getComponent('db');
+	}
+
+	public function testAssureMessageSetOnInit()
+	{
+		$val = new UniqueValidator();
+		$this->assertTrue(is_string($val->message));
+	}
+
+	public function testValidateAttributeDefault()
+	{
+		$val = new UniqueValidator();
+		$m = ValidatorTestMainModel::find()->one();
+		$val->validateAttribute($m, 'id');
+		$this->assertFalse($m->hasErrors('id'));
+		$m = ValidatorTestRefModel::find(1);
+		$val->validateAttribute($m, 'ref');
+		$this->assertTrue($m->hasErrors('ref'));
+		// new record:
+		$m = new ValidatorTestRefModel();
+		$m->ref = 5;
+		$val->validateAttribute($m, 'ref');
+		$this->assertTrue($m->hasErrors('ref'));
+		$m = new ValidatorTestRefModel();
+		$m->ref = 12121;
+		$val->validateAttribute($m, 'ref');
+		$this->assertFalse($m->hasErrors('ref'));
+		$m->save(false);
+		$val->validateAttribute($m, 'ref');
+		$this->assertFalse($m->hasErrors('ref'));
+		// array error
+		$m = FakedValidationModel::createWithAttributes(array('attr_arr' => array('a', 'b')));
+		$val->validateAttribute($m, 'attr_arr');
+		$this->assertTrue($m->hasErrors('attr_arr'));
+	}
+
+	public function testValidateAttributeOfNonARModel()
+	{
+		$val = new UniqueValidator(array('className' => ValidatorTestRefModel::className(), 'attributeName' => 'ref'));
+		$m = FakedValidationModel::createWithAttributes(array('attr_1' => 5, 'attr_2' => 1313));
+		$val->validateAttribute($m, 'attr_1');
+		$this->assertTrue($m->hasErrors('attr_1'));
+		$val->validateAttribute($m, 'attr_2');
+		$this->assertFalse($m->hasErrors('attr_2'));
+	}
+
+	public function testValidateNonDatabaseAttribute()
+	{
+		$val = new UniqueValidator(array('className' => ValidatorTestRefModel::className(), 'attributeName' => 'ref'));
+		$m = ValidatorTestMainModel::find(1);
+		$val->validateAttribute($m, 'testMainVal');
+		$this->assertFalse($m->hasErrors('testMainVal'));
+		$m = ValidatorTestMainModel::find(1);
+		$m->testMainVal = 4;
+		$val->validateAttribute($m, 'testMainVal');
+		$this->assertTrue($m->hasErrors('testMainVal'));
+	}
+
+	public function testValidateAttributeAttributeNotInTableException()
+	{
+		$this->setExpectedException('yii\base\InvalidConfigException');
+		$val = new UniqueValidator();
+		$m = new ValidatorTestMainModel();
+		$val->validateAttribute($m, 'testMainVal');
+	}
+}
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