diff --git a/tests/Payum/Payex/Tests/Functional/Api/OrderApiTest.php b/tests/Payum/Payex/Tests/Functional/Api/OrderApiTest.php
index <HASH>..<HASH> 100644
--- a/tests/Payum/Payex/Tests/Functional/Api/OrderApiTest.php
+++ b/tests/Payum/Payex/Tests/Functional/Api/OrderApiTest.php
@@ -13,10 +13,10 @@ class OrderApiTest extends \PHPUnit_Framework_TestCase
     
     public static function setUpBeforeClass()
     {
-        if (false == isset($GLOBALS['__PAYUM_PAYEX_ACCOUNT_NUMBER'])) {
+        if (empty($GLOBALS['__PAYUM_PAYEX_ACCOUNT_NUMBER'])) {
             throw new \PHPUnit_Framework_SkippedTestError('Please configure __PAYUM_PAYEX_ACCOUNT_NUMBER in your phpunit.xml');
         }
-        if (false == isset($GLOBALS['__PAYUM_PAYEX_ENCRYPTION_KEY'])) {
+        if (empty($GLOBALS['__PAYUM_PAYEX_ENCRYPTION_KEY'])) {
             throw new \PHPUnit_Framework_SkippedTestError('Please configure __PAYUM_PAYEX_ENCRYPTION_KEY in your phpunit.xml');
         }
     }
fix skipp functional tests on travis.