diff --git a/app/code/Magento/ConfigurableProduct/Test/Unit/Plugin/SalesRule/Model/Rule/Condition/ProductTest.php b/app/code/Magento/ConfigurableProduct/Test/Unit/Plugin/SalesRule/Model/Rule/Condition/ProductTest.php
new file mode 100644
index 0000000000000..4478c225dedfa
--- /dev/null
+++ b/app/code/Magento/ConfigurableProduct/Test/Unit/Plugin/SalesRule/Model/Rule/Condition/ProductTest.php
@@ -0,0 +1,198 @@
+<?php declare(strict_types=1);
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\ConfigurableProduct\Plugin\SalesRule\Model\Rule\Condition;
+
+use Magento\Backend\Helper\Data;
+use Magento\Catalog\Api\ProductRepositoryInterface;
+use Magento\Catalog\Model\Product\Type;
+use Magento\Catalog\Model\ProductFactory;
+use Magento\Catalog\Model\ResourceModel\Product;
+use Magento\ConfigurableProduct\Model\Product\Type\Configurable;
+use Magento\ConfigurableProduct\Plugin\SalesRule\Model\Rule\Condition\Product as ValidatorPlugin;
+use Magento\Directory\Model\CurrencyFactory;
+use Magento\Eav\Model\Config;
+use Magento\Eav\Model\Entity\AbstractEntity;
+use Magento\Eav\Model\ResourceModel\Entity\Attribute\Set\Collection;
+use Magento\Framework\App\ScopeResolverInterface;
+use Magento\Framework\Locale\Format;
+use Magento\Framework\Locale\FormatInterface;
+use Magento\Framework\Locale\ResolverInterface;
+use Magento\Quote\Model\Quote\Item\AbstractItem;
+use Magento\Rule\Model\Condition\Context;
+use Magento\SalesRule\Model\Rule\Condition\Product as SalesRuleProduct;
+
+/**
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
+ */
+class ProductTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var \Magento\Framework\TestFramework\Unit\Helper\ObjectManager
+     */
+    private $objectManager;
+
+    /**
+     * @var SalesRuleProduct
+     */
+    private $validator;
+
+    /**
+     * @var \Magento\ConfigurableProduct\Plugin\SalesRule\Model\Rule\Condition\Product
+     */
+    private $validatorPlugin;
+
+    public function setUp()
+    {
+        $this->objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
+        $this->validator = $this->createValidator();
+        $this->validatorPlugin = $this->objectManager->getObject(ValidatorPlugin::class);
+    }
+
+    /**
+     * @return \Magento\SalesRule\Model\Rule\Condition\Product
+     */
+    private function createValidator(): SalesRuleProduct
+    {
+        /** @var Context|\PHPUnit_Framework_MockObject_MockObject $contextMock */
+        $contextMock = $this->getMockBuilder(Context::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        /** @var Data|\PHPUnit_Framework_MockObject_MockObject $backendHelperMock */
+        $backendHelperMock = $this->getMockBuilder(Data::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        /** @var Config|\PHPUnit_Framework_MockObject_MockObject $configMock */
+        $configMock = $this->getMockBuilder(Config::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        /** @var ProductFactory|\PHPUnit_Framework_MockObject_MockObject $productFactoryMock */
+        $productFactoryMock = $this->getMockBuilder(ProductFactory::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        /** @var ProductRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject $productRepositoryMock */
+        $productRepositoryMock = $this->getMockBuilder(ProductRepositoryInterface::class)
+            ->getMockForAbstractClass();
+        $attributeLoaderInterfaceMock = $this->getMockBuilder(AbstractEntity::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['getAttributesByCode'])
+            ->getMock();
+        $attributeLoaderInterfaceMock
+            ->expects($this->any())
+            ->method('getAttributesByCode')
+            ->willReturn([]);
+        /** @var Product|\PHPUnit_Framework_MockObject_MockObject $productMock */
+        $productMock = $this->getMockBuilder(Product::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['loadAllAttributes', 'getConnection', 'getTable'])
+            ->getMock();
+        $productMock->expects($this->any())
+        ->method('loadAllAttributes')
+        ->willReturn($attributeLoaderInterfaceMock);
+        /** @var Collection|\PHPUnit_Framework_MockObject_MockObject $collectionMock */
+        $collectionMock = $this->getMockBuilder(Collection::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        /** @var FormatInterface|\PHPUnit_Framework_MockObject_MockObject $formatMock */
+        $formatMock = new Format(
+            $this->getMockBuilder(ScopeResolverInterface::class)->disableOriginalConstructor()->getMock(),
+            $this->getMockBuilder(ResolverInterface::class)->disableOriginalConstructor()->getMock(),
+            $this->getMockBuilder(CurrencyFactory::class)->disableOriginalConstructor()->getMock()
+        );
+
+        return new SalesRuleProduct(
+            $contextMock,
+            $backendHelperMock,
+            $configMock,
+            $productFactoryMock,
+            $productRepositoryMock,
+            $productMock,
+            $collectionMock,
+            $formatMock
+        );
+    }
+
+    public function testChildIsUsedForValidation()
+    {
+        $configurableProductMock = $this->createProductMock();
+        $configurableProductMock
+            ->expects($this->any())
+            ->method('getTypeId')
+            ->willReturn(Configurable::TYPE_CODE);
+        $configurableProductMock
+            ->expects($this->any())
+            ->method('hasData')
+            ->with($this->equalTo('special_price'))
+            ->willReturn(false);
+
+        /* @var AbstractItem|\PHPUnit_Framework_MockObject_MockObject $item */
+        $item = $this->getMockBuilder(AbstractItem::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['setProduct', 'getProduct', 'getChildren'])
+            ->getMockForAbstractClass();
+        $item->expects($this->any())
+            ->method('getProduct')
+            ->willReturn($configurableProductMock);
+
+        $simpleProductMock = $this->createProductMock();
+        $simpleProductMock
+            ->expects($this->any())
+            ->method('getTypeId')
+            ->willReturn(Type::TYPE_SIMPLE);
+        $simpleProductMock
+            ->expects($this->any())
+            ->method('hasData')
+            ->with($this->equalTo('special_price'))
+            ->willReturn(true);
+
+        $childItem = $this->getMockBuilder(AbstractItem::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['getProduct'])
+            ->getMockForAbstractClass();
+        $childItem->expects($this->any())
+            ->method('getProduct')
+            ->willReturn($simpleProductMock);
+
+        $item->expects($this->any())
+            ->method('getChildren')
+            ->willReturn([$childItem]);
+        $item->expects($this->once())
+            ->method('setProduct')
+            ->with($simpleProductMock);
+
+        $this->validator->setAttribute('special_price');
+
+        $this->validatorPlugin->beforeValidate($this->validator, $item);
+    }
+
+    /**
+     * @return Product|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private function createProductMock(): \PHPUnit_Framework_MockObject_MockObject
+    {
+        $productMock = $this->getMockBuilder(\Magento\Catalog\Model\Product::class)
+            ->disableOriginalConstructor()
+            ->setMethods([
+                'getAttribute',
+                'getId',
+                'setQuoteItemQty',
+                'setQuoteItemPrice',
+                'getTypeId',
+                'hasData',
+            ])
+            ->getMock();
+        $productMock
+            ->expects($this->any())
+            ->method('setQuoteItemQty')
+            ->willReturnSelf();
+        $productMock
+            ->expects($this->any())
+            ->method('setQuoteItemPrice')
+            ->willReturnSelf();
+
+        return $productMock;
+    }
+}