diff --git a/src/BrowserTest.php b/src/BrowserTest.php
index 78abbb3..994f213 100644
--- a/src/BrowserTest.php
+++ b/src/BrowserTest.php
@@ -11,7 +11,7 @@ abstract class BrowserTest extends \PHPUnit_Extensions_Selenium2TestCase{
   public function setUp(){
     $this->setHost('localhost');
     $this->setPort(4444);
-    $args=explode(',',getenv('SeleniumBrowserArgs'));
+    $args=explode(' ',getenv('SeleniumBrowserArgs'));
     $args[]='screenshot';
     $this->setDesiredCapabilities(['moz:firefoxOptions'=>['args'=>$args]]);
     $this->setBrowserUrl(getenv('SeleniumBrowserUrl'));