False positive when wp-cron disabled

Nice plugin, and helpful, so thanks. There is a related thread here about verifying WP Cron functionality: http://wordpress.org/support/topic/missing-verification-of-wordpress-cron-functionality?replies=3

This problem and solution is much simpler, however: Check to be sure DISABLE_WP_CRON has not been set to “true” in wp-config.php.

A fix might look something like inserting at line 128:

function test_constant_DISABLE_WP_CRON() {
	if ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) {
		return array(
			'desc' => sprintf( __( 'The %1$s constant is defined as %2$s.', 'background-update-tester' ), '<code>DISABLE_WP_CRON</code>', 'true' ),
			'severity' => 'fail',
		);
	}
}

I tested this and verified it works.
https://wordpress.org/plugins/background-update-tester/