Fatal error: Uncaught Error: Class "Magento\TestFramework\Indexer\TestCase" not found in /home/jasainfo/public_html/dev/tests/integration/testsuite/Magento/Tax/Model/Sales/Total/Quote/SubtotalTest.php:18 Stack trace: #0 {main} thrown in /home/jasainfo/public_html/dev/tests/integration/testsuite/Magento/Tax/Model/Sales/Total/Quote/SubtotalTest.php on line 18