old_contents: from rooms import Room, Office,  LivingSpace
  from unittest import TestCase
  
  
  class RoomTestCase(TestCase):
  
      def test_room_instance(self):
          self.valhalla = Room('Valhalla', 'office', 6)
          self.assertEqual(self.valhalla.room_name, 'Valhalla')
  
  
  class OfficeSpaceTestCase(TestCase):
  
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(Office, Room))
  
      def test_room_correct_room_capacity(self):
          self.valhalla = Office('Valhalla')
          self.assertEqual(self.valhalla.room_capacity, 6)
  
  
  class LivingSpaceTestCase(TestCase):
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(LivingSpace, Room))
  
      def test_room_correct_room_capacity(self):
          self.python = LivingSpace('Python')
          self.assertEqual(self.python.room_capacity, 4)from rooms import Room, Office,  LivingSpace
  from unittest import TestCase
  
  
  class RoomTestCase(TestCase):
  
      def test_room_instance(self):
          self.valhalla = Room('Valhalla', 'office', 6)
          self.assertEqual(self.valhalla.room_name, 'Valhalla')
  
  
  class OfficeSpaceTestCase(TestCase):
  
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(Office, Room))
  
      def test_room_correct_room_capacity(self):
          self.valhalla = Office('Valhalla')
          self.assertEqual(self.valhalla.room_capacity, 6)
  
  
  class LivingSpaceTestCase(TestCase):
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(LivingSpace, Room))
  
      def test_room_correct_room_capacity(self):
          self.python = LivingSpace('Python')
          self.assertEqual(self.python.room_capacity, 4)
new_contents: from rooms import Room, Office,  LivingSpace
  from unittest import TestCase
  
  
  class RoomTestCase(TestCase):
  
      def test_room_instance(self):
          self.valhalla = Room('Valhalla', 'office', 6)
          self.assertEqual(self.valhalla.room_name, 'Valhalla')
  
  
  class OfficeSpaceTestCase(TestCase):
  
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(Office, Room))
  
      def test_room_correct_room_capacity(self):
          self.valhalla = Office('Valhalla')
          self.assertEqual(self.valhalla.room_capacity, 6)
  
  
  class LivingSpaceTestCase(TestCase):
      def test_class_inherits_from_room(self):
          self.assertTrue(issubclass(LivingSpace, Room))
  
      def test_room_correct_room_capacity(self):
          self.python = LivingSpace('Python')
          self.assertEqual(self.python.room_capacity, 4)
subject: Remove redundant test case