diff --git a/tests/mutex/MutexConcurrencyTest.php b/tests/mutex/MutexConcurrencyTest.php
index 716e1cf5..cf6a5c7b 100644
--- a/tests/mutex/MutexConcurrencyTest.php
+++ b/tests/mutex/MutexConcurrencyTest.php
@@ -325,7 +325,7 @@ static function (string $uri): \Redis {
         if (getenv('MYSQL_DSN')) {
             $cases['MySQLMutex'] = [static function ($timeout = 3): Mutex {
                 var_dump([getenv('MYSQL_DSN'), getenv('MYSQL_USER'), getenv('MYSQL_USER')]);
-                $pdo = new \PDO(getenv('MYSQL_DSN'), getenv('MYSQL_USER'), getenv('MYSQL_USER'));
+                $pdo = new \PDO(getenv('MYSQL_DSN'), getenv('MYSQL_USER'), getenv('MYSQL_PASSWORD'));
                 $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
 
                 return new MySQLMutex($pdo, 'test', $timeout);