Fix error

1 job from CI in 21 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #986
test

00:21

 
Test test
  Downloading https://files.pythonhosted.org/packages/69/1b/b853c7a9d4f6a6d00749e94eb6f3a041e342a885b87340b79c1ef73e3a78/certifi-2019.6.16-py2.py3-none-any.whl (157kB)
Requirement already satisfied: setuptools>=36.2.1 in /usr/local/lib/python3.7/site-packages (from pipenv) (41.0.1)
Installing collected packages: virtualenv-clone, virtualenv, certifi, pipenv
Successfully installed certifi-2019.6.16 pipenv-2018.11.26 virtualenv-16.6.1 virtualenv-clone-0.5.3
$ pipenv install
Warning: Python 3.6 was not found on your system…
You can specify specific versions of Python with:
$ pipenv --python path/to/python
ERROR: Job failed: exit code 1