Got an error creating the test database: database "test_django_1_9_test" already exists

Testing against Django installed in '/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django' with up to 4 processes
Creating test database for alias 'default'...
Destroying old test database for alias 'default'...
Traceback (most recent call last):
  File "./runtests.py", line 458, in <module>
    options.debug_sql, options.parallel)
  File "./runtests.py", line 275, in django_tests
    extra_tests=extra_tests,
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/test/runner.py", line 532, in run_tests
    old_config = self.setup_databases()
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/test/runner.py", line 482, in setup_databases
    self.parallel, **kwargs
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/test/runner.py", line 726, in setup_databases
    serialize=connection.settings_dict.get("TEST", {}).get("SERIALIZE", True),
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/backends/base/creation.py", line 78, in create_test_db
    self.connection._test_serialized_contents = self.serialize_db_to_string()
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/backends/base/creation.py", line 122, in serialize_db_to_string
    serializers.serialize("json", get_objects(), indent=None, stream=out)
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/core/serializers/__init__.py", line 129, in serialize
    s.serialize(queryset, **options)
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/core/serializers/base.py", line 79, in serialize
    for count, obj in enumerate(queryset, start=1):
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/backends/base/creation.py", line 118, in get_objects
    for obj in queryset.iterator():
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/models/query.py", line 52, in __iter__
    results = compiler.execute_sql()
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/models/sql/compiler.py", line 848, in execute_sql
    cursor.execute(sql, params)
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/utils.py", line 95, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/home/user/dev/env/django-1.9.3/local/lib/python2.7/site-packages/Django-1.9.3-py2.7.egg/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: column postgres_tests_integerarraymodel.field does not exist
LINE 1: SELECT "postgres_tests_integerarraymodel"."id", "postgres_te...
                                                        ^