old_contents: from django.test import TestCase
  from admin_permissions.admin import ModelAdminPermission
  
  
  class AdminPermissionTest(TestCase):
      def setUp(self):
          self.fieldsets = [
              ('General', {
                  'fields': ['title', 'slug', 'preview_content', 'content', 'public'],
              }),
              ('SEO', {
                  'fields': ['seo_title', 'seo_description'],
              }),
          ]
  
      def test_remove_fields(self):
          fieldsets = ModelAdminPermission.remove_fields(self.fieldsets, 'title')
          self.assertListEqual(['slug', 'preview_content', 'content', 'public'], fieldsets[0][1]['fields'])
  
      def test_remove_fields_and_empty_fieldsets(self):
          fieldsets = ModelAdminPermission.remove_fields(self.fieldsets, 'seo_title', 'seo_description')
          self.assertListEqual([('General', {'fields': ['title', 'slug', 'preview_content', 'content', 'public']})], fieldsets)
  
new_contents: import unittest
  from admin_permissions.admin import ModelAdminPermission
  
  
  class AdminPermissionTest(unittest.TestCase):
      def setUp(self):
          self.fieldsets = [
              ('General', {
                  'fields': ['title', 'slug', 'preview_content', 'content', 'public'],
              }),
              ('SEO', {
                  'fields': ['seo_title', 'seo_description'],
              }),
          ]
  
      def test_remove_fields(self):
          fieldsets = ModelAdminPermission.remove_fields(self.fieldsets, 'title')
          self.assertListEqual(['slug', 'preview_content', 'content', 'public'], fieldsets[0][1]['fields'])
  
      def test_remove_fields_and_empty_fieldsets(self):
          fieldsets = ModelAdminPermission.remove_fields(self.fieldsets, 'seo_title', 'seo_description')
          self.assertListEqual([('General', {'fields': ['title', 'slug', 'preview_content', 'content', 'public']})], fieldsets)
  
subject: Fix test