private function getFailedFooter()
{
$formatString = "FAILURES!\nTests: %d, Assertions: %d, Failures: %d, Errors: %d.\n";
return "\n" . $this->red(sprintf($formatString, $this->results->getTotalTests(), $this->results->getTotalAssertions(), $this->results->getTotalFailures(), $this->results->getTotalErrors()));
}