language: python
python:
  - "3.4"
  - "3.5"
  - "3.6"
  - "3.7"
  - "3.8"
  - "3.9-dev"
  - "nightly"
# command to install dependencies
install:
  - pip install .
  - pip install nose
# command to run tests
script: nosetests

language: python
python:
  - "3.4"
  - "3.5"
  - "3.6"
  - "3.7"
  - "3.8"
  - "3.9-dev"
  - "nightly"
# command to install dependencies
install:
  - pip install .
  - pip install pytest
# command to run tests
script: pytest

Use pytest rather than nose
Use pytest rather than nose

because nose doesn't appear to work under the current Python 3.9-dev
