diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
index 701218407cff..aeff627c58bd 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\HttpKernel\Util\Filesystem;
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as BaseWebTestCase;
+use Symfony\Component\HttpKernel\Kernel;
 
 class WebTestCase extends BaseWebTestCase
 {
@@ -33,7 +34,7 @@ protected function setUp()
 
     protected function deleteTmpDir($testCase)
     {
-        if (!file_exists($dir = sys_get_temp_dir().'/'.$testCase)) {
+        if (!file_exists($dir = sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$testCase)) {
             return;
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
index 0e97eeaa09f1..f2e8d31167d9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
@@ -80,12 +80,12 @@ public function getRootDir()
 
     public function getCacheDir()
     {
-        return sys_get_temp_dir().'/'.$this->testCase.'/cache/'.$this->environment;
+        return sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$this->testCase.'/cache/'.$this->environment;
     }
 
     public function getLogDir()
     {
-        return sys_get_temp_dir().'/'.$this->testCase.'/logs';
+        return sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$this->testCase.'/logs';
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
index bbeb81e7eed1..b6e8acb53d52 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\HttpKernel\Util\Filesystem;
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as BaseWebTestCase;
+use Symfony\Component\HttpKernel\Kernel;
 
 class WebTestCase extends BaseWebTestCase
 {
@@ -33,7 +34,7 @@ protected function setUp()
 
     protected function deleteTmpDir($testCase)
     {
-        if (!file_exists($dir = sys_get_temp_dir().'/'.$testCase)) {
+        if (!file_exists($dir = sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$testCase)) {
             return;
         }
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
index 958a2cad132b..d1b49eee84e9 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
@@ -80,12 +80,12 @@ public function getRootDir()
 
     public function getCacheDir()
     {
-        return sys_get_temp_dir().'/'.$this->testCase.'/cache/'.$this->environment;
+        return sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$this->testCase.'/cache/'.$this->environment;
     }
 
     public function getLogDir()
     {
-        return sys_get_temp_dir().'/'.$this->testCase.'/logs';
+        return sys_get_temp_dir().'/'.Kernel::VERSION.'/'.$this->testCase.'/logs';
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)