diff --git a/lib/Cake/Test/Case/Controller/Component/SessionComponentTest.php b/lib/Cake/Test/Case/Controller/Component/SessionComponentTest.php
index fa7bae08b..b885dfcfe 100644
--- a/lib/Cake/Test/Case/Controller/Component/SessionComponentTest.php
+++ b/lib/Cake/Test/Case/Controller/Component/SessionComponentTest.php
@@ -115,7 +115,7 @@ class SessionComponentTest extends CakeTestCase {
  */
 	public function setUp() {
 		parent::setUp();
-		$_SESSION = null;
+		$_SESSION = array();
 		$this->ComponentCollection = new ComponentCollection();
 	}