diff --git a/.travis.yml b/.travis.yml
index 02f46e1..8e1afec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: php
 
 php:
   - "5.5"
-  - "5.4"
+
+install:
+  - require mikey179/vfsStream:1.2.0
 
 script: phpunit --bootstrap ./tests/bootstrap.php ./tests
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 697505e..cffb2e5 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -2,7 +2,12 @@
 
 ob_start();
 
-require_once '/usr/local/Cellar/php55/5.5.7/lib/php/vfsStream/vfsStream.php';
+$vfs_file = '/usr/local/Cellar/php55/5.5.7/lib/php/vfsStream/vfsStream.php';
+
+if (file_exists($vfs_file))
+{
+	require_once $vfs_file;
+}
 
 $root = vfsStream::setup('site');
 define('SITE_PATH', vfsStream::url('site/'));