diff --git a/Tests/Transport/PostgreSqlConnectionTest.php b/Tests/Transport/PostgreSqlConnectionTest.php
index e110b51..fe1f2c1 100644
--- a/Tests/Transport/PostgreSqlConnectionTest.php
+++ b/Tests/Transport/PostgreSqlConnectionTest.php
@@ -11,7 +11,6 @@
 
 namespace Symfony\Component\Messenger\Bridge\Doctrine\Tests\Transport;
 
-use Doctrine\DBAL\Schema\Synchronizer\SchemaSynchronizer;
 use Doctrine\DBAL\Schema\Table;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Messenger\Bridge\Doctrine\Transport\PostgreSqlConnection;
@@ -26,10 +25,9 @@ public function testSerialize()
         $this->expectException(\BadMethodCallException::class);
         $this->expectExceptionMessage('Cannot serialize '.PostgreSqlConnection::class);
 
-        $schemaSynchronizer = $this->createMock(SchemaSynchronizer::class);
         $driverConnection = $this->createMock(\Doctrine\DBAL\Connection::class);
 
-        $connection = new PostgreSqlConnection([], $driverConnection, $schemaSynchronizer);
+        $connection = new PostgreSqlConnection([], $driverConnection);
         serialize($connection);
     }
 
@@ -38,10 +36,9 @@ public function testUnserialize()
         $this->expectException(\BadMethodCallException::class);
         $this->expectExceptionMessage('Cannot unserialize '.PostgreSqlConnection::class);
 
-        $schemaSynchronizer = $this->createMock(SchemaSynchronizer::class);
         $driverConnection = $this->createMock(\Doctrine\DBAL\Connection::class);
 
-        $connection = new PostgreSqlConnection([], $driverConnection, $schemaSynchronizer);
+        $connection = new PostgreSqlConnection([], $driverConnection);
         $connection->__wakeup();
     }