commit cdcaaa6e2fcadc595c8a1354f7d49d8c9dd286c7
Author: zhoulinhui <df.some@foxmail.com>
Date:   Tue Oct 6 21:27:56 2020 +0800

    Reuse the docs deps to benefit from constraints
    
    Tox trying to install latest versions for building releasenotes,
    which may not be supported by stable and lower branches,
    so should be restricted by respective version's upper-constraints.txt
    This ps to reuse upper-constraints.txt from docs deps
    
    Change-Id: I70d53f31dccca644bcea1abf0b1976bc7121ffe9

diff --git a/tox.ini b/tox.ini
index d57bf8d..97e7a9e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -77,7 +77,7 @@ commands = oslo-config-generator --config-file=etc/oslo-config-generator/kuryr.c
 
 [testenv:releasenotes]
 basepython = python3
-deps = -r{toxinidir}/doc/requirements.txt
+deps = {[testenv:docs]deps}
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:lower-constraints]