public function test_create_comment_no_post_id() {
    wp_set_current_user( self::$admin_id );

    $params  = array(
      'author_name'  => 'Comic Book Guy',
      'author_email' => 'cbg@androidsdungeon.com',
      'author_url'   => 'http://androidsdungeon.com',
      'content'      => 'Worst Comment Ever!',
      'status'       => 'approved',
    );
    $request = new WP_REST_Request( 'POST', '/wp/v2/comments' );
    $request->add_header( 'content-type', 'application/json' );
    $request->set_body( wp_json_encode( $params ) );

    $response = rest_get_server()->dispatch( $request );

    $this->assertErrorResponse( 'rest_comment_invalid_post_id', $response, 403 );
  }