Important: #80606 - Testing Framework Removal / Use composer package instead¶
See Issue #80606
The TYPO3 core base testing classes were moved to a separate composer package and removed from the TYPO3 core. If you want to continue using the testing framework classes please use composer and require the package typo3/testing-framework.
To make sure you don't run into path issues, you can set the following environment variable: TYPO3_PATH_ROOT = The path to your TYPO3 root directory
Find the new package on github
And on packagist