Automated testing has greatly improved the Drupal core development process. With automated testing over 24,500 unique core patches have been reviewed, and almost 19,000 test assertions are now run against every core patch. The result has been faster development cycle, more stable releases, and the ability to add features more quickly to Drupal core.

1. Building better websites with automated quality assurance Cheaper, Faster, more Reliable

5. Drupal.org Usage * http://qa.drupal.org/pifr/statistics Number of tests reviewed 24,840 Number of reviews performed 132,773 Average number of times a test is reviewed 5