django/tests/README.rst

To run the test suite, first, create and activate a virtual environment. Then install some requirements and run the tests:

$ cd tests
$ pip install -e ..
$ pip install -r requirements/py3.txt  # or py2.txt
$ ./runtests.py

For more information about the test suite, see https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/.