diff --git a/Mysql/PDO.php b/Mysql/PDO.php
index 80af2db..03b3232 100644
--- a/Mysql/PDO.php
+++ b/Mysql/PDO.php
@@ -141,6 +141,8 @@ class PDO implements StopHeartbeatCheck
 			$this->_pdo()->beginTransaction();
 		}
 		$this->_transaction++;
+
+		echo __FUNCTION__, $this->_transaction, PHP_EOL;
 	}