Schema::disableForeignKeyConstraints();

foreach ($tableNames as $name) {

    //if you don't want to truncate migrations

    if ($name == 'migrations') {

        continue;

    }

    DB::table($name)->truncate();

}

Visitor::query()->truncate();

Schema::enableForeignKeyConstraints();

$tableNames = Schema::getConnection()->getDoctrineSchemaManager()->listTableNames();