diff --git a/tests/config.php b/tests/config.php
index <HASH>..<HASH> 100644
--- a/tests/config.php
+++ b/tests/config.php
@@ -1,4 +1,5 @@
 <?php
+define('PHPUNIT_UPLOADCARE_TESTSUITE', true);
 define('UC_PUBLIC_KEY', 'demopublickey');
 define('UC_SECRET_KEY', 'demoprivatekey');
 date_default_timezone_set('UTC');
unit test were failing because PHPUNIT_UPLOADCARE_TESTSUITE constant wasn't defined