old_contents: import sys
  
  from chilero.pg.test import TestCase
  
  
  class TestDBFromSettings(TestCase):
      settings = dict(
          db_url='postgres://postgres@localhost/fixed_db_name'
      )
      def test_db_name(self):
          assert self._database_name.startswith(
              'postgres://postgres@localhost/fixed_db_name_testdbfromsettings_'
          )
  
  
  class TestRandomDB(TestCase):
      def test_db_name(self):
          version = '{}{}{}'.format(
              sys.version_info.major,
              sys.version_info.minor,
              sys.version_info.micro,
          )
          assert self._database_name.startswith(
              'postgres://postgres@localhost/test_{version}_testrandomdb_'.format(
                  version=version
              )
          )
  
new_contents: import sys
  
  from chilero.pg.test import TestCase
  
  
  
  
subject: remove tests about single database per testcase