friendica-addons/testdrive/config/testdrive.config.php

<?php

// Warning: Don't change this file! It only holds the default config values for this addon.
// Instead, copy this file to config/testdrive.config.php in your Friendica directory and set the correct values there

return [
	'testdrive' => [
		// expiredays (Integer)
		// When an account is created on the site, it is given a hard expiration date of this many days. 0 to disable.
		'expiredays' => 0,
	],
];