pytest==2.9.2
pytest-twisted
pytest-cov==2.2.1
testfixtures
jmespath
leveldb
botocore
# optional for shell wrapper tests
bpython
ipython
brotlipy

pytest==3.6.3
pytest-twisted
pytest-cov==2.5.1
testfixtures
jmespath
leveldb
botocore
# optional for shell wrapper tests
bpython
ipython
brotlipy

Update ancient pytest on python 3
Update ancient pytest on python 3

2.9 gives collection errors on python 3.7 due to PEP 479.
