old_contents: from django.contrib import messages
  from django.template.defaultfilters import pluralize
  from django.urls import reverse_lazy
  
  from conf_site.core.views import CsvImportView, SuperuserOnlyView
  from conf_site.reviews.tasks import import_reviewer_csv
  
  
  class ReviewerCsvImportView(SuperuserOnlyView, CsvImportView):
      success_url = reverse_lazy("reviewer_import")
      template_name = "reviews/reviewer_import.html"
  
      def process(self, filename, user_id):
          result = import_reviewer_csv(filename)
          if result:
              messages.success(
                  self.request,
                  "{} user{} created. {} existing user{} found.".format(
                      result[0],
                      pluralize(result[0]),
                      result[1],
                      pluralize(result[1]),
                  ),
              )
          else:
              messages.error(
                  self.request, "Unable to successfully import CSV file."
              )
  
new_contents: from django.contrib import messages
  from django.template.defaultfilters import pluralize
  from django.urls import reverse_lazy
  
  from conf_site.core.views import CsvImportView, SuperuserOnlyView
  from conf_site.reviews.tasks import import_reviewer_csv
  
  
  class ReviewerCsvImportView(SuperuserOnlyView, CsvImportView):
      raise_exception = True
      success_url = reverse_lazy("reviewer_import")
      template_name = "reviews/reviewer_import.html"
  
      def process(self, filename, user_id):
          result = import_reviewer_csv(filename)
          if result:
              messages.success(
                  self.request,
                  "{} user{} created. {} existing user{} found.".format(
                      result[0],
                      pluralize(result[0]),
                      result[1],
                      pluralize(result[1]),
                  ),
              )
          else:
              messages.error(
                  self.request, "Unable to successfully import CSV file."
              )
  
subject: Change ReviewerCsvImportView behavior.