Merge pull request #10 from magento-commerce/2.3-develop-phpunit9

MC-38769: PHPUnit 9 support for PHP 2.3.x

Author: svera

app/code/Magento/TaxSampleData/Test/Model/TaxTest.php

@@ -29,7 +29,7 @@
  *
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
-class TaxTest extends \PHPUnit_Framework_TestCase
+class TaxTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @var Tax
@@ -370,7 +370,7 @@ private function prepareFilters()
             ->method('addFilters')
             ->willReturnSelf();
 
-        $searchCriteria = $this->getMock(SearchCriteria::class);
+        $searchCriteria = $this->createMock(SearchCriteria::class);
 
         $this->criteriaBuilder->expects(self::once())
             ->method('create')