diff --git a/Mysql/PDO.php b/Mysql/PDO.php
index c399b00..781a5c7 100644
--- a/Mysql/PDO.php
+++ b/Mysql/PDO.php
@@ -286,9 +286,6 @@ class PDO implements StopHeartbeatCheck
 	 */
 	public function _pdo(): \PDO
 	{
-		if ($this->_timer === -1) {
-			$this->heartbeat_check();
-		}
 		if (!($this->pdo instanceof \PDO)) {
 			$this->pdo = $this->newClient();
 		}