-r{toxinidir}/requirements-docs.txt
-chttps://raw.githubusercontent.com/openstack/requirements/stable/yoga/upper-constraints.txt
-chttps://git.onap.org/doc/plain/etc/upper-constraints.onap.txt
-commands = echo "Link Checking not enforced"
-#commands = sphinx-build -b linkcheck -d {envtmpdir}/doctrees ./ {toxinidir}/_build/linkcheck
+commands = sphinx-build -b linkcheck -d {envtmpdir}/doctrees ./ {toxinidir}/_build/linkcheck
whitelist_externals = echo