[testenv:docs]
deps = -rdocs/requirements.txt
commands =
- sphinx-build -b html -n -d {envtmpdir}/doctrees ./docs/ {envtmpdir}/html
+ sphinx-build -W -b html -n -d {envtmpdir}/doctrees ./docs/ {envtmpdir}/html
echo "Generated docs available in {envtmpdir}/html"
whitelist_externals = echo