diff --git a/extensions/sphinx/ActiveRelation.php b/extensions/sphinx/ActiveRelation.php
new file mode 100644
index 0000000..15a5ba0
--- /dev/null
+++ b/extensions/sphinx/ActiveRelation.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\sphinx;
+
+use yii\db\ActiveRelationInterface;
+use yii\db\ActiveRelationTrait;
+
+/**
+ * Class ActiveRelation
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+class ActiveRelation extends ActiveQuery implements ActiveRelationInterface
+{
+	use ActiveRelationTrait;
+}
\ No newline at end of file
diff --git a/tests/unit/data/sphinx/ar/ArticleDb.php b/tests/unit/data/sphinx/ar/ArticleDb.php
index 3c32f99..4972112 100644
--- a/tests/unit/data/sphinx/ar/ArticleDb.php
+++ b/tests/unit/data/sphinx/ar/ArticleDb.php
@@ -2,6 +2,7 @@
 
 namespace yiiunit\data\sphinx\ar;
 
+use yii\sphinx\ActiveRelation;
 use yiiunit\data\ar\ActiveRecord as ActiveRecordDb;
 
 class ArticleDb extends ActiveRecordDb
@@ -10,4 +11,15 @@ class ArticleDb extends ActiveRecordDb
 	{
 		return 'yii2_test_article';
 	}
+
+	public function getIndex()
+	{
+		$config = [
+			'modelClass' => ArticleIndex::className(),
+			'primaryModel' => $this,
+			'link' => ['id' => 'id'],
+			'multiple' => false,
+		];
+		return new ActiveRelation($config);
+	}
 }
\ No newline at end of file
diff --git a/tests/unit/extensions/sphinx/ActiveRelationTest.php b/tests/unit/extensions/sphinx/ActiveRelationTest.php
index 343a58b..05c48c9 100644
--- a/tests/unit/extensions/sphinx/ActiveRelationTest.php
+++ b/tests/unit/extensions/sphinx/ActiveRelationTest.php
@@ -19,37 +19,26 @@ class ActiveRelationTest extends SphinxTestCase
 		ActiveRecordDb::$db = $this->getDbConnection();
 	}
 
+	// Tests :
+
 	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);
+		/** @var ArticleDb $article */
+		$article = ArticleDb::find(['id' => 2]);
+		$this->assertFalse($article->isRelationPopulated('index'));
+		$index = $article->index;
+		$this->assertTrue($article->isRelationPopulated('index'));
+		$this->assertTrue($index instanceof ArticleIndex);
 		$this->assertEquals(1, count($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);
-	}
-
-	/**
-	 * @depends testFindEager
-	 */
-	public function testFindWithSnippets()
-	{
-		$articles = ArticleIndex::find()
-			->match('about')
-			->with('source')
-			->snippetByModel()
-			->all();
+		$articles = ArticleDb::find()->with('index')->all();
 		$this->assertEquals(2, count($articles));
+		$this->assertTrue($articles[0]->isRelationPopulated('index'));
+		$this->assertTrue($articles[1]->isRelationPopulated('index'));
+		$this->assertTrue($articles[0]->index instanceof ArticleIndex);
+		$this->assertTrue($articles[1]->index instanceof ArticleIndex);
 	}
 }
\ No newline at end of file
diff --git a/tests/unit/extensions/sphinx/ExternalActiveRelationTest.php b/tests/unit/extensions/sphinx/ExternalActiveRelationTest.php
new file mode 100644
index 0000000..81f7989
--- /dev/null
+++ b/tests/unit/extensions/sphinx/ExternalActiveRelationTest.php
@@ -0,0 +1,57 @@
+<?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 ExternalActiveRelationTest extends SphinxTestCase
+{
+	protected function setUp()
+	{
+		parent::setUp();
+		ActiveRecord::$db = $this->getConnection();
+		ActiveRecordDb::$db = $this->getDbConnection();
+	}
+
+	// Tests :
+
+	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);
+	}
+
+	/**
+	 * @depends testFindEager
+	 */
+	public function testFindWithSnippets()
+	{
+		$articles = ArticleIndex::find()
+			->match('about')
+			->with('source')
+			->snippetByModel()
+			->all();
+		$this->assertEquals(2, count($articles));
+	}
+}
\ No newline at end of file