diff --git a/.travis.yml b/.travis.yml
index 36ee8f0..bede03c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,13 +4,11 @@ python:
 - 3.5
 - 3.6
 - 3.7
-before_install:
-- pip install codecov
-- pip install -r requires/testing.txt
 install:
-- pip install -e .
+- pip install -r requires/development.txt codecov
 script:
 - nosetests --with-coverage
+- python setup.py build_sphinx
 after_success:
 - codecov
 sudo: false
diff --git a/setup.cfg b/setup.cfg
index 4fc6ae8..6121b0b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,6 +3,8 @@ universal = 1
 
 [build_sphinx]
 all-files = 1
+fresh-env = 1
+warning-is-error = 1
 
 [flake8]
 exclude = env,build