old_contents: import pytest
  from web_test_base import *
  
  class TestIATIPreview(WebTestBase):
      requests_to_load = {
          'IATI Preview': {
              'url': 'https://www.iatiregistry.org/'
          }
      }
  
      def test_contains_links(self, loaded_request):
          """
          Test that each page contains links to the defined URLs.
          """
          result = utility.get_links_from_page(loaded_request)
  
          assert "http://www.iatistandard.org/" in result
  
new_contents: import pytest
  from web_test_base import *
  
  class TestIATIPreview(WebTestBase):
      requests_to_load = {
          'IATI Preview': {
              'url': 'http://preview.iatistandard.org/'
          }
      }
  
      def test_contains_links(self, loaded_request):
          """
          Test that each page contains links to the defined URLs.
          """
          result = utility.get_links_from_page(loaded_request)
  
          assert "http://www.iatistandard.org/" in result
  
subject: Fix Preview URL