-r{toxinidir}/etc/requirements-docs.txt
-c{toxinidir}/etc/upper-constraints.os.txt
-c{toxinidir}/etc/upper-constraints.onap.txt
-commands = sphinx-build -q -b linkcheck -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/linkcheck
+commands = sphinx-build -W -q -b linkcheck -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/linkcheck
[testenv:spellcheck]
basepython = python3