use Civi\Api4\Activity;
use Civi\Api4\Contact;
-use api\v4\UnitTestCase;
+use api\v4\Api4TestBase;
+use Civi\Test\TransactionalInterface;
/**
* @group headless
*/
-class NullValueTest extends UnitTestCase {
+class NullValueTest extends Api4TestBase implements TransactionalInterface {
public function setUpHeadless() {
$format = '{contact.first_name}{ }{contact.last_name}';