      """
  
      available_apps = []
  
      models = [Author, AuthorWithM2M, Book, BookWithSlug, BookWithM2M, Tag, TagIndexed, TagM2MTest, TagUniqueRename, UniqueTest]
  
      # Utility functions
  
      def tearDown(self):
          # Delete any tables made for our models
 
</s> remove from .models import Author, AuthorWithM2M, Book, BookWithSlug, BookWithM2M, Tag, TagIndexed, TagM2MTest, TagUniqueRename, UniqueTest
 </s> add from .models import (Author, AuthorWithM2M, Book, BookWithLongName,
    BookWithSlug, BookWithM2M, Tag, TagIndexed, TagM2MTest, TagUniqueRename,
    UniqueTest) </s> remove             index_name = hashlib.md5(index_name).hexdigest()[:self.connection.features.max_index_name_length]
 </s> add             index_name = hashlib.md5(force_bytes(index_name)).hexdigest()[:self.connection.features.max_index_name_length]
    models = [
        Author, AuthorWithM2M, Book, BookWithLongName, BookWithSlug,
        BookWithM2M, Tag, TagIndexed, TagM2MTest, TagUniqueRename, UniqueTest,
    ]
      """
  
      available_apps = []
  
    models = [
        Author, AuthorWithM2M, Book, BookWithLongName, BookWithSlug,
        BookWithM2M, Tag, TagIndexed, TagM2MTest, TagUniqueRename, UniqueTest,
    ]
  
      # Utility functions
  
      def tearDown(self):
          # Delete any tables made for our models
keep keep keep keep replace keep keep keep keep keep
 Fixed #21497 -- Forced conversion to bytes for very long index names 
tests/schema/tests.py