diff --git a/src/BrowserTest.php b/src/BrowserTest.php
index 6c6d135..a7e6a25 100644
--- a/src/BrowserTest.php
+++ b/src/BrowserTest.php
@@ -12,8 +12,8 @@ abstract class BrowserTest extends \PHPUnit_Extensions_Selenium2TestCase{
     if(! $host=getenv('SeleniumHost')){
       $host='localhost';
     }
-    if(! $port=getenv('SeleniumPort')){
-      $port='4444';
+    if(! $port=(int)getenv('SeleniumPort')){
+      $port=4444;
     }
     $this->setHost($host);
     $this->setPort($port);