It’s that time again! Drupal 9 will be released later this year and it’s never too late to test patches and contribute. Thinking about it, I wondered how to quickly test patches and install Drupal 9 from my local Git checkout. When I say quickly it means it really should be dead simple, by typing one command only. The idea being to make sure I’d always install Drupal from the 9.0.x branch at the latest commit to follow changes.