test-requirements.txt

flake8
flake8-bugbear; python_version >= '3.5'
flake8-pyi; python_version >= '3.6'
lxml==4.1.1
psutil==5.4.0
pytest>=3.0
pytest-xdist>=1.18
pytest-cov>=2.4.0
typed-ast>=1.1.0,<1.2.0
typing>=3.5.2; python_version < '3.5'
py>=1.5.2