Refs #3781, fixing build.

tests/PHPUnit/IntegrationTestCase.php

@@ -146,6 +146,9 @@ abstract class IntegrationTestCase extends PHPUnit_Framework_TestCase
         // Usually these modules either return random changing data, or are already tested in specific unit tests.
         self::setApiNotToCall(self::$defaultApiNotToCall);
         self::setApiToCall(array());
+        
+        // set config superuser login to test login
+        Piwik_Config::getInstance()->superuser['login'] = 'superUserLogin';
     }
 
     public static function tearDownAfterClass()