diff --git a/tests/unit/data/config.php b/tests/unit/data/config.php
index 304c3fc..5fd7e3e 100644
--- a/tests/unit/data/config.php
+++ b/tests/unit/data/config.php
@@ -30,4 +30,17 @@ return [
 			'fixture' => __DIR__ . '/postgres.sql',
 		],
 	],
+	'sphinx' => [
+		'sphinx' => [
+			'dsn' => 'mysql:host=127.0.0.1;port=9306;',
+			'username' => '',
+			'password' => '',
+		],
+		'db' => [
+			'dsn' => 'mysql:host=127.0.0.1;dbname=yiitest',
+			'username' => 'travis',
+			'password' => '',
+			'fixture' => __DIR__ . '/sphinx/source.sql',
+		],
+	]
 ];
diff --git a/tests/unit/data/sphinx/ar/ArticleDb.php b/tests/unit/data/sphinx/ar/ArticleDb.php
new file mode 100644
index 0000000..de9ca0f
--- /dev/null
+++ b/tests/unit/data/sphinx/ar/ArticleDb.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace yiiunit\data\sphinx\ar;
+
+use yiiunit\data\ar;
+
+class ArticleDb extends ActiveRecord
+{
+	public static function tableName()
+	{
+		return 'yii2_test_article';
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/sphinx/ar/ArticleIndex.php b/tests/unit/data/sphinx/ar/ArticleIndex.php
index d009d93..f7f0ef7 100644
--- a/tests/unit/data/sphinx/ar/ArticleIndex.php
+++ b/tests/unit/data/sphinx/ar/ArticleIndex.php
@@ -2,6 +2,8 @@
 
 namespace yiiunit\data\sphinx\ar;
 
+use yii\db\ActiveRelation;
+
 class ArticleIndex extends ActiveRecord
 {
 	public $custom_column;
@@ -15,4 +17,15 @@ class ArticleIndex extends ActiveRecord
 	{
 		$query->andWhere('author_id=1');
 	}
+
+	public function getSource()
+	{
+		$config = [
+			'modelClass' => ArticleDb::className(),
+			'primaryModel' => $this,
+			'link' => ['id' => 'id'],
+			'multiple' => false,
+		];
+		return new ActiveRelation($config);
+	}
 }
\ No newline at end of file
diff --git a/tests/unit/data/sphinx/ar/ItemDb.php b/tests/unit/data/sphinx/ar/ItemDb.php
new file mode 100644
index 0000000..128e473
--- /dev/null
+++ b/tests/unit/data/sphinx/ar/ItemDb.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace yiiunit\data\sphinx\ar;
+
+use yiiunit\data\ar;
+
+class ItemDb extends ActiveRecord
+{
+	public static function tableName()
+	{
+		return 'yii2_test_item';
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/data/sphinx/sphinx.sql b/tests/unit/data/sphinx/source.sql
similarity index 85%
rename from tests/unit/data/sphinx/sphinx.sql
rename to tests/unit/data/sphinx/source.sql
index 1cdd5ae..24d9f4e 100644
--- a/tests/unit/data/sphinx/sphinx.sql
+++ b/tests/unit/data/sphinx/source.sql
@@ -1,5 +1,10 @@
-SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
-SET time_zone = "+00:00";
+/**
+ * This is the MySQL database schema for creation of the test Sphinx index sources.
+ */
+
+DROP TABLE IF EXISTS yii2_test_article;
+DROP TABLE IF EXISTS yii2_test_item;
+DROP TABLE IF EXISTS yii2_test_article_tag;
 
 CREATE TABLE IF NOT EXISTS `yii2_test_article` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
@@ -10,10 +15,6 @@ CREATE TABLE IF NOT EXISTS `yii2_test_article` (
   PRIMARY KEY (`id`)
 ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
 
-INSERT INTO `yii2_test_article` (`id`, `title`, `content`, `author_id`, `create_date`) VALUES
-(1, 'About cats', 'This article is about cats', 1, '2013-10-23 00:00:00'),
-(2, 'About dogs', 'This article is about dogs', 2, '2013-11-15 00:00:00');
-
 CREATE TABLE IF NOT EXISTS `yii2_test_item` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `name` varchar(255) NOT NULL,
@@ -23,16 +24,20 @@ CREATE TABLE IF NOT EXISTS `yii2_test_item` (
   PRIMARY KEY (`id`)
 ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
 
-INSERT INTO `yii2_test_item` (`id`, `name`, `description`, `category_id`, `price`) VALUES
-(1, 'pencil', 'Simple pencil', 1, 2.5),
-(2, 'table', 'Wooden table', 2, 100);
-
 CREATE TABLE IF NOT EXISTS `yii2_test_article_tag` (
   `article_id` int(11) NOT NULL,
   `tag_id` int(11) NOT NULL,
   PRIMARY KEY (`article_id`,`tag_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
 
+INSERT INTO `yii2_test_article` (`id`, `title`, `content`, `author_id`, `create_date`) VALUES
+(1, 'About cats', 'This article is about cats', 1, '2013-10-23 00:00:00'),
+(2, 'About dogs', 'This article is about dogs', 2, '2013-11-15 00:00:00');
+
+INSERT INTO `yii2_test_item` (`id`, `name`, `description`, `category_id`, `price`) VALUES
+(1, 'pencil', 'Simple pencil', 1, 2.5),
+(2, 'table', 'Wooden table', 2, 100);
+
 INSERT INTO `yii2_test_article_tag` (`article_id`, `tag_id`) VALUES
 (1, 1),
 (1, 2),
diff --git a/tests/unit/data/sphinx/sphinx.conf b/tests/unit/data/sphinx/sphinx.conf
index 6ab6625..6be9606 100644
--- a/tests/unit/data/sphinx/sphinx.conf
+++ b/tests/unit/data/sphinx/sphinx.conf
@@ -2,7 +2,7 @@
 #
 # Setup test environment:
 # - initialize test database source:
-# mysql -D yii2test -u test < /path/to/yii/tests/unit/data/sphinx/sphinx.sql
+# mysql -D yii2test -u test < /path/to/yii/tests/unit/data/sphinx/source.sql
 # - setup test Sphinx indexes:
 # indexer --config /path/to/yii/tests/unit/data/sphinx/sphinx.conf --all [--rotate]
 # - run the "searchd" daemon:
diff --git a/tests/unit/extensions/sphinx/ActiveRelationTest.php b/tests/unit/extensions/sphinx/ActiveRelationTest.php
new file mode 100644
index 0000000..b304086
--- /dev/null
+++ b/tests/unit/extensions/sphinx/ActiveRelationTest.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace yiiunit\extensions\sphinx;
+
+use yiiunit\data\sphinx\ar\ActiveRecord;
+use yiiunit\data\ar\ActiveRecord as ActiveRecordDb;
+use yiiunit\data\sphinx\ar\ArticleIndex;
+use yiiunit\data\sphinx\ar\ArticleDb;
+
+/**
+ * @group sphinx
+ */
+class ActiveRelationTest extends SphinxTestCase
+{
+	protected function setUp()
+	{
+		parent::setUp();
+		ActiveRecord::$db = $this->getConnection();
+		ActiveRecordDb::$db = $this->getDbConnection();
+	}
+
+	public function testFindLazy()
+	{
+		/** @var ArticleIndex $article */
+		$article = ArticleIndex::find(['id' => 2]);
+		$this->assertFalse($article->isRelationPopulated('source'));
+		$source = $article->source;
+		$this->assertTrue($article->isRelationPopulated('source'));
+		$this->assertTrue($source instanceof ArticleDb);
+		$this->assertEquals(1, count($article->populatedRelations));
+	}
+
+	public function testFindEager()
+	{
+		$articles = ArticleIndex::find()->with('source')->all();
+		$this->assertEquals(2, count($articles));
+		$this->assertTrue($articles[0]->isRelationPopulated('source'));
+		$this->assertTrue($articles[1]->isRelationPopulated('source'));
+		$this->assertTrue($articles[0]->source instanceof ArticleDb);
+		$this->assertTrue($articles[1]->source instanceof ArticleDb);
+	}
+}
\ No newline at end of file
diff --git a/tests/unit/extensions/sphinx/SphinxTestCase.php b/tests/unit/extensions/sphinx/SphinxTestCase.php
index 6b936a3..899ea72 100644
--- a/tests/unit/extensions/sphinx/SphinxTestCase.php
+++ b/tests/unit/extensions/sphinx/SphinxTestCase.php
@@ -21,9 +21,21 @@ class SphinxTestCase extends TestCase
 		'password' => '',
 	];
 	/**
-	 * @var Connection
+	 * @var Connection Sphinx connection instance.
 	 */
 	protected $sphinx;
+	/**
+	 * @var array Database connection configuration.
+	 */
+	protected $dbConfig = [
+		'dsn' => 'mysql:host=127.0.0.1;',
+		'username' => '',
+		'password' => '',
+	];
+	/**
+	 * @var \yii\db\Connection database connection instance.
+	 */
+	protected $db;
 
 	public static function setUpBeforeClass()
 	{
@@ -33,10 +45,14 @@ class SphinxTestCase extends TestCase
 	protected function setUp()
 	{
 		parent::setUp();
-		//$this->sphinxConfig = $this->getParam('sphinx');
 		if (!extension_loaded('pdo') || !extension_loaded('pdo_mysql')) {
 			$this->markTestSkipped('pdo and pdo_mysql extension are required.');
 		}
+		$config = $this->getParam('sphinx');
+		if (!empty($config)) {
+			$this->sphinxConfig = $config['sphinx'];
+			$this->dbConfig = $config['db'];
+		}
 		$this->mockApplication();
 		static::loadClassMap();
 	}
@@ -67,15 +83,15 @@ class SphinxTestCase extends TestCase
 
 	/**
 	 * @param bool $reset whether to clean up the test database
-	 * @param bool $open whether to open and populate test database
+	 * @param bool $open whether to open test database
 	 * @return \yii\sphinx\Connection
 	 */
-	public function getConnection($reset = true, $open = true)
+	public function getConnection($reset = false, $open = true)
 	{
 		if (!$reset && $this->sphinx) {
 			return $this->sphinx;
 		}
-		$db = new \yii\sphinx\Connection;
+		$db = new Connection;
 		$db->dsn = $this->sphinxConfig['dsn'];
 		if (isset($this->sphinxConfig['username'])) {
 			$db->username = $this->sphinxConfig['username'];
@@ -86,14 +102,6 @@ class SphinxTestCase extends TestCase
 		}
 		if ($open) {
 			$db->open();
-			if (!empty($this->sphinxConfig['fixture'])) {
-				$lines = explode(';', file_get_contents($this->sphinxConfig['fixture']));
-				foreach ($lines as $line) {
-					if (trim($line) !== '') {
-						$db->pdo->exec($line);
-					}
-				}
-			}
 		}
 		$this->sphinx = $db;
 		return $db;
@@ -109,4 +117,38 @@ class SphinxTestCase extends TestCase
 			$this->sphinx->createCommand('TRUNCATE RTINDEX ' . $indexName)->execute();
 		}
 	}
+
+	/**
+	 * @param bool $reset whether to clean up the test database
+	 * @param bool $open whether to open and populate test database
+	 * @return \yii\db\Connection
+	 */
+	public function getDbConnection($reset = true, $open = true)
+	{
+		if (!$reset && $this->db) {
+			return $this->db;
+		}
+		$db = new \yii\db\Connection;
+		$db->dsn = $this->dbConfig['dsn'];
+		if (isset($this->dbConfig['username'])) {
+			$db->username = $this->dbConfig['username'];
+			$db->password = $this->dbConfig['password'];
+		}
+		if (isset($this->dbConfig['attributes'])) {
+			$db->attributes = $this->dbConfig['attributes'];
+		}
+		if ($open) {
+			$db->open();
+			if (!empty($this->dbConfig['fixture'])) {
+				$lines = explode(';', file_get_contents($this->dbConfig['fixture']));
+				foreach ($lines as $line) {
+					if (trim($line) !== '') {
+						$db->pdo->exec($line);
+					}
+				}
+			}
+		}
+		$this->db = $db;
+		return $db;
+	}
 }
\ No newline at end of file