Fatal error: Uncaught Error: Class "Magento\TestFramework\TestCase\AbstractBackendController" not found in /home/jasainfo/public_html/dev/tests/integration/testsuite/Magento/Customer/Block/Adminhtml/Edit/Tab/NewsletterTest.php:16 Stack trace: #0 {main} thrown in /home/jasainfo/public_html/dev/tests/integration/testsuite/Magento/Customer/Block/Adminhtml/Edit/Tab/NewsletterTest.php on line 16