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