          # extra queries upon connecting (notably mysql executes
          # "SET SQL_AUTO_IS_NULL = 0"), which will affect assertNumQueries().
          connections['other'].ensure_connection()
  
      def tearDown(self):
          router.routers = self.old_routers
  
      def test_multidb(self):
          """
          Test that, when using multiple databases, we use the db_for_read (see
          #20401).
          """
 
</s> remove         self.old_routers = router.routers
        router.routers = [TestRouter()]

 </s> add  </s> remove     def setUp(self):
        # Make the 'other' database appear to be a replica of the 'default'
        self.old_routers = router.routers
        router.routers = [MigrateNothingRouter()]

    def tearDown(self):
        # Restore the 'other' database as an independent database
        router.routers = self.old_routers

 </s> add  </s> remove     def setUp(self):
        # Make the 'other' database appear to be a replica of the 'default'
        self.old_routers = router.routers
        router.routers = [TestRouter()]

    def tearDown(self):
        # Restore the 'other' database as an independent database
        router.routers = self.old_routers

 </s> add  </s> remove     def setUp(self):
        self.old_routers = router.routers
        router.routers = [OtherRouter()]

    def tearDown(self):
        router.routers = self.old_routers

 </s> add  </s> remove     def setUp(self):
        self._old_routers = router.routers
        router.routers = [TestRouter()]

    def tearDown(self):
        router.routers = self._old_routers
 </s> add 
          # extra queries upon connecting (notably mysql executes
          # "SET SQL_AUTO_IS_NULL = 0"), which will affect assertNumQueries().
          connections['other'].ensure_connection()
  



      def test_multidb(self):
          """
          Test that, when using multiple databases, we use the db_for_read (see
          #20401).
          """
keep keep keep keep replace replace replace keep keep keep keep keep
 Replaced router.routers usage with override_settings(DATABASE_ROUTERS); refs #23933. 
tests/contenttypes_tests/tests.py