protected function setUpDoctrineSchema()
    {
        if ($this->schemaSetUp) {
            // @codeCoverageIgnoreStart
            return;
            // @codeCoverageIgnoreEnd
        }

        DB::connection($this->connection)
            ->getDoctrineSchemaManager()
            ->getDatabasePlatform()
            ->registerDoctrineTypeMapping('enum', 'string');

        $this->schemaSetUp = true;
    }