Postgres schema

How add schama in migration 
$this->db->schama not work.
Add schama name to table name "test.prod" gives error becouse 
CONSTRAINT "pk_test"."name" PRIMARY KEY("name")

PHP Code:

class AddProd extends Migration
{
    public function up()
    {

        $this->forge->addField([
            'name'        => ['type' => 'varchar', 'constraint' => 128],
        ]);
        
        $this->forge->addKey(['name'], true);
        $attributes = ['ENGINE' => 'InnoDB'];
        $this->db->schema = 'test';
        $this->forge->createTable('test.prod', true, $attributes);