error for running tests with make tests

wtf.py

flake8 compressor --ignore=E501,E128
coverage run --branch --source=compressor `which django-admin.py` test --settings=compressor.test_settings compressor
Coverage.py warning: No data was collected.
Traceback (most recent call last):
  File "/home/myusuf3/.virtualenvs/compressor/bin/django-admin.py", line 5, in <module>
    management.execute_from_command_line()
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 69, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 7, in <module>
    from django.test.utils import get_runner
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/test/__init__.py", line 5, in <module>
    from django.test.client import Client, RequestFactory
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/test/client.py", line 21, in <module>
    from django.test import signals
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/test/signals.py", line 2, in <module>
    from django.db import connections
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/db/__init__.py", line 11, in <module>
    if DEFAULT_DB_ALIAS not in settings.DATABASES:
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/utils/functional.py", line 184, in inner
    self._setup()
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/conf/__init__.py", line 42, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/myusuf3/.virtualenvs/compressor/local/lib/python2.7/site-packages/django/conf/__init__.py", line 95, in __init__
    raise ImportError("Could not import settings '%s' (Is it on sys.path?): %s" % (self.SETTINGS_MODULE, e))
ImportError: Could not import settings 'compressor.test_settings' (Is it on sys.path?): No module named compressor.test_settings
make: *** [test] Error 1