Dfyjkt

When I run unittests with django-simple-history==1.6.0, it runs fine but with
django-simple-history==1.9.0 it breaks the unittests.
Any ideas how to fix this?

Creating test database for alias 'default'...
Traceback (most recent call last):
 File "manage.py", line 12, in <module>
 execute_from_command_line(sys.argv)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
 utility.execute()
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 330, in execute
 self.fetch_command(subcommand).run_from_argv(self.argv)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 30, in run_from_argv
 super(Command, self).run_from_argv(argv)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/base.py", line 390, in run_from_argv
 self.execute(*args, **cmd_options)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 74, in execute
 super(Command, self).execute(*args, **options)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/base.py", line 441, in execute
 output = self.handle(*args, **options)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 90, in handle
 failures = test_runner.run_tests(test_labels)
 File "/home/me/venv/lib/python2.7/site-packages/django/test/runner.py", line 210, in run_tests
 old_config = self.setup_databases()
 File "/home/me/venv/lib/python2.7/site-packages/django/test/runner.py", line 166, in setup_databases
 **kwargs
 File "/home/me/venv/lib/python2.7/site-packages/django/test/runner.py", line 370, in setup_databases
 serialize=connection.settings_dict.get("TEST", ).get("SERIALIZE", True),
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/base/creation.py", line 376, in create_test_db
 self.connection._test_serialized_contents = self.serialize_db_to_string()
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/base/creation.py", line 413, in serialize_db_to_string
 serializers.serialize("json", get_objects(), indent=None, stream=out)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/serializers/__init__.py", line 129, in serialize
 s.serialize(queryset, **options)
 File "/home/me/venv/lib/python2.7/site-packages/django/core/serializers/base.py", line 52, in serialize
 for obj in queryset:
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/base/creation.py", line 409, in get_objects
 for obj in queryset.iterator():
 File "/home/me/venv/lib/python2.7/site-packages/django/db/models/query.py", line 238, in iterator
 results = compiler.execute_sql()
 File "/home/me/venv/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 829, in execute_sql
 cursor.execute(sql, params)
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
 return self.cursor.execute(sql, params)
 File "/home/me/venv/lib/python2.7/site-packages/django/db/utils.py", line 97, in __exit__
 six.reraise(dj_exc_type, dj_exc_value, traceback)
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
 return self.cursor.execute(sql, params)
 File "/home/me/venv/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 318, in execute
 return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such column: myapp_historicalbook.history_change_reason