diff --git a/tox.ini b/tox.ini
index 2c423eea..7209845a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -72,7 +72,7 @@ commands = python setup.py build_sphinx {posargs}
 ignore = E125,H404
 show-source = true
 builtins = _
-exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools,build
+exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 
 [testenv:pip-check-reqs]
 # Do not install test-requirements as that will pollute the virtualenv for