pbr>=2.0.0,!=2.1.0  # Apache-2.0
docutils!=0.13.1,>=0.11 # OSI-Approved Open Source, Public Domain
openstackdocstheme>=2.2.1 # Apache-2.0
sphinx>=2.0.0,!=2.1.0 # BSD
stestr>=2.0.0 # Apache-2.0
testtools>=1.4.0  # MIT
yasfb>=0.5.1