diff --git a/tests/TestCase/View/Helper/FormHelperTest.php b/tests/TestCase/View/Helper/FormHelperTest.php
index c6d3ea5f23f..1bfffa3d044 100644
--- a/tests/TestCase/View/Helper/FormHelperTest.php
+++ b/tests/TestCase/View/Helper/FormHelperTest.php
@@ -141,6 +141,7 @@ class FormHelperTest extends TestCase
     public function setUp()
     {
         parent::setUp();
+        session_id('');
 
         Configure::write('Config.language', 'eng');
         Configure::write('App.base', '');