diff --git a/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ContainerTest.php b/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ContainerTest.php
index 1742616f65..c7d3b0283a 100644
--- a/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ContainerTest.php
+++ b/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ContainerTest.php
@@ -3,9 +3,12 @@
 require_once __DIR__ . '/../../../PhraseanetPHPUnitAuthenticatedAbstract.class.inc';
 require_once __DIR__ . '/../../Bridge_datas.inc';
 
-$new_include_path = realpath(__DIR__ . '/../../../../vendor/gdata/') . PATH_SEPARATOR . get_include_path();
-set_include_path($new_include_path);
-
+$include_path = realpath(__DIR__ . '/../../../../vendor/gdata/');
+if(strpos(get_include_path(), $include_path) === false)
+{
+  $new_include_path = $include_path . PATH_SEPARATOR . get_include_path();
+  set_include_path($new_include_path);
+}
 
 require_once('Zend/Loader.php');
 Zend_Loader::loadClass('Zend_Gdata_YouTube');
diff --git a/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ElementTest.php b/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ElementTest.php
index 08fe46adfe..295d667f13 100644
--- a/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ElementTest.php
+++ b/lib/unitTest/Bridge/Api/Youtube/Bridge_Api_Youtube_ElementTest.php
@@ -3,9 +3,12 @@
 require_once __DIR__ . '/../../../PhraseanetPHPUnitAuthenticatedAbstract.class.inc';
 require_once __DIR__ . '/../../Bridge_datas.inc';
 
-$new_include_path = realpath(__DIR__ . '/../../../../vendor/gdata/') . PATH_SEPARATOR . get_include_path();
-set_include_path($new_include_path);
-
+$include_path = realpath(__DIR__ . '/../../../../vendor/gdata/');
+if(strpos(get_include_path(), $include_path) === false)
+{
+  $new_include_path = $include_path . PATH_SEPARATOR . get_include_path();
+  set_include_path($new_include_path);
+}
 
 require_once('Zend/Loader.php');
 Zend_Loader::loadClass('Zend_Gdata_YouTube');
diff --git a/lib/unitTest/Bridge/Bridge_datas.inc b/lib/unitTest/Bridge/Bridge_datas.inc
index 9506fb51e4..e6fec4eac5 100644
--- a/lib/unitTest/Bridge/Bridge_datas.inc
+++ b/lib/unitTest/Bridge/Bridge_datas.inc
@@ -2,8 +2,12 @@
 
 require_once __DIR__ . '/../../bootstrap.php';
 
-$new_include_path = realpath(__DIR__ . "/../../vendor/") . PATH_SEPARATOR . get_include_path();
-set_include_path($new_include_path);
+$include_path = realpath(__DIR__ . '/../../vendor/');
+if(strpos(get_include_path(), $include_path) === false)
+{
+  $new_include_path = $include_path . PATH_SEPARATOR . get_include_path();
+  set_include_path($new_include_path);
+}
 
 require_once __DIR__ . "/../../vendor/Phlickr/Api.php";