diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..22d0d82
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+vendor
diff --git a/src/BeSimple/SoapCommon/Cache.php b/src/BeSimple/SoapCommon/Cache.php
index c4213a8..7deecc7 100644
--- a/src/BeSimple/SoapCommon/Cache.php
+++ b/src/BeSimple/SoapCommon/Cache.php
@@ -72,6 +72,10 @@ class Cache
 
     static public function setDirectory($directory)
     {
+        if (!is_dir($directory)) {
+            mkdir($directory, 0777, true);
+        }
+
         self::iniSet('soap.wsdl_cache_dir', $directory);
     }
 
diff --git a/tests/BeSimple/Tests/SoapCommon/CacheTest.php b/tests/BeSimple/Tests/SoapCommon/CacheTest.php
index aebe217..f56f192 100644
--- a/tests/BeSimple/Tests/SoapCommon/CacheTest.php
+++ b/tests/BeSimple/Tests/SoapCommon/CacheTest.php
@@ -36,11 +36,19 @@ class SoapRequestTest extends \PHPUnit_Framework_TestCase
 
     public function testSetDirectory()
     {
-        Cache::setDirectory('/foo');
-        $this->assertEquals('/foo', Cache::getDirectory());
+        \vfsStream::setup('Fixtures');
 
-        Cache::setDirectory('/bar');
-        $this->assertEquals('/bar', Cache::getDirectory());
+        $this->assertFalse(\vfsStreamWrapper::getRoot()->hasChild('foo'));
+        $dir = \vfsStream::url('Fixtures/foo');
+        Cache::setDirectory($dir);
+        $this->assertEquals($dir, Cache::getDirectory());
+        $this->assertTrue(\vfsStreamWrapper::getRoot()->hasChild('foo'));
+
+        $this->assertFalse(\vfsStreamWrapper::getRoot()->hasChild('bar'));
+        $dir = \vfsStream::url('Fixtures/bar');
+        Cache::setDirectory($dir);
+        $this->assertEquals($dir, Cache::getDirectory());
+        $this->assertTrue(\vfsStreamWrapper::getRoot()->hasChild('bar'));
     }
 
     public function testSetLifetime()
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 96aebb6..f92b0dd 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -11,11 +11,18 @@ spl_autoload_register(function($class) {
 
             return true;
         }
-    } else if (0 === strpos($class, 'BeSimple\SoapCommon\\')) {
+    } elseif (0 === strpos($class, 'BeSimple\SoapCommon\\')) {
         $path = __DIR__.'/../src/'.($class = strtr($class, '\\', '/')).'.php';
         if (file_exists($path) && is_readable($path)) {
             require_once $path;
 
+            return true;
+        }
+    } elseif (0 === strpos($class, 'vfsStream')) {
+        $path = __DIR__.'/../vendor/vfsStream/src/main/php/org/bovigo/vfs/'.$class.'.php';
+        if (file_exists($path) && is_readable($path)) {
+            require_once $path;
+
             return true;
         }
     }
diff --git a/vendors.php b/vendors.php
new file mode 100755
index 0000000..7f127b0
--- /dev/null
+++ b/vendors.php
@@ -0,0 +1,41 @@
+#!/usr/bin/env php
+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+/*
+
+CAUTION: This file installs the dependencies needed to run the BeSimpleSoapCommon test suite.
+
+https://github.com/BeSimple/BeSimpleSoapCommon
+
+*/
+
+if (!is_dir($vendorDir = dirname(__FILE__).'/vendor')) {
+    mkdir($vendorDir, 0777, true);
+}
+
+$deps = array(
+    array('vfsStream', 'https://github.com/mikey179/vfsStream.git', 'RELEASE-0.10.1'),
+);
+
+foreach ($deps as $dep) {
+    list($name, $url, $rev) = $dep;
+
+    echo "> Installing/Updating $name\n";
+
+    $installDir = $vendorDir.'/'.$name;
+    if (!is_dir($installDir)) {
+        system(sprintf('git clone %s %s', escapeshellarg($url), escapeshellarg($installDir)));
+    }
+
+    system(sprintf('cd %s && git fetch origin && git reset --hard %s', escapeshellarg($installDir), escapeshellarg($rev)));
+}