Django: Split tests across multiple files, but share same database?

I am using Django 1.8. I have been writing tests for my Django API in one long file called test_api.py. The structure of the file has been as follows:

def setUpModule():
  management.call_command('loaddata', 'frontend/fixtures/data.json',
                        verbosity=0)
  management.call_command('my_custom_command')

def tearDownModule():
  management.call_command('flush', verbosity=0, interactive=False)


class TestAPIBNFViews(TestCase):
  def test_api_view_list_all(self):
    url = '/api/1.0/bnf_code'
    # do testing

def test_api_view_query(self):
    # more testint

The fixtures and management command being loaded once before all the tests run, and so far this has worked great.

Now however the file is getting long and unwieldy, and I want to split it into multiple files. I've created multiple files called test_list and test_query and given each a setUpModule section as above.

However, firstly this isn't DRY, and secondly when I run python manage.py test, lots of the tests fail with duplicate foreign key errors like:

ProgrammingError: relation "frontend_sha_id" already exists

I guess this isn't surprising, since the tests are trying to create the test database multiple times.

However, if I remove setUpModule from all but the first test (listed alphabetically by filename), the other tests fail because they can't see any data.

How can I run setUpModule once, before all the tests run, and still keep the tests in separate files for convenience?