diff --git a/app/code/Magento/Variable/Test/Unit/Model/ResourceModel/Variable/CollectionTest.php b/app/code/Magento/Variable/Test/Unit/Model/ResourceModel/Variable/CollectionTest.php
new file mode 100644
index 0000000000000..38cf2fefcef97
--- /dev/null
+++ b/app/code/Magento/Variable/Test/Unit/Model/ResourceModel/Variable/CollectionTest.php
@@ -0,0 +1,94 @@
+<?php
+/***
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Variable\Test\Unit\Model\ResourceModel\Variable;
+
+use Magento\Framework\DB\Adapter\AdapterInterface;
+use Magento\Framework\DB\Select;
+use Magento\Framework\Model\ResourceModel\Db\AbstractDb;
+use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
+use Magento\Variable\Model\ResourceModel\Variable\Collection;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Provide tests for Variable collection class.
+ */
+class CollectionTest extends TestCase
+{
+    /**
+     * Test Collection::addValuesToResult() build correct query.
+     *
+     * @return void
+     */
+    public function testAddValuesToResult()
+    {
+        $mainTableName = 'testMainTable';
+        $tableName = 'variable_value';
+        $field = 'value_table.store_id';
+
+        $select = $this->getMockBuilder(Select::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $select->expects($this->once())
+            ->method('from')
+            ->with($this->identicalTo(['main_table' => $mainTableName]))
+            ->willReturnSelf();
+        $select->expects($this->once())
+            ->method('join')
+            ->with(
+                $this->identicalTo(['value_table' => $tableName]),
+                $this->identicalTo('value_table.variable_id = main_table.variable_id'),
+                $this->identicalTo(['value_table.plain_value', 'value_table.html_value'])
+            )->willReturnSelf();
+
+        $connection = $this->getMockBuilder(AdapterInterface::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['select', 'prepareSqlCondition', 'quoteIdentifier'])
+            ->getMockForAbstractClass();
+        $connection->expects($this->any())
+            ->method('select')
+            ->willReturn($select);
+        $connection->expects($this->once())
+            ->method('quoteIdentifier')
+            ->with($this->identicalTo($field))
+            ->willReturn($field);
+        $connection->expects($this->once())
+            ->method('prepareSqlCondition')
+            ->with(
+                $this->identicalTo($field),
+                $this->identicalTo(['eq' => 0])
+            )->willReturn('testResultCondition');
+
+        $resource = $this->getMockBuilder(AbstractDb::class)
+            ->setMethods(['getTable', 'getMainTable', 'getConnection'])
+            ->disableOriginalConstructor()
+            ->getMockForAbstractClass();
+        $resource->expects($this->any())
+            ->method('getConnection')
+            ->willReturn($connection);
+        $resource->expects($this->once())
+            ->method('getMainTable')
+            ->willReturn('testMainTable');
+        $resource->expects($this->exactly(2))
+            ->method('getTable')
+            ->withConsecutive(
+                [$mainTableName],
+                [$tableName]
+            )->willReturnOnConsecutiveCalls(
+                $mainTableName,
+                $tableName
+            );
+
+        $objectManager = new ObjectManager($this);
+        $collection = $objectManager->getObject(
+            Collection::class,
+            [
+                'resource' => $resource,
+            ]
+        );
+        $this->assertInstanceOf(Collection::class, $collection->addValuesToResult());
+    }
+}