diff --git a/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php b/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
index 61d37b6bf..fffdb9f4c 100644
--- a/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
+++ b/lib/Cake/Test/Case/Model/Datasource/DboSourceTest.php
@@ -51,7 +51,7 @@ class DboTestSource extends DboSource {
 		$this->_connection = $conn;
 	}
 
-	protected function _supportNestedTransaction() {
+	public function supportNestedTransaction() {
 		return true;
 	}