diff --git a/.travis.yml b/.travis.yml
index c3d65f0e63..538aad5133 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -146,6 +146,7 @@ install:
   - pip install --upgrade setuptools
   - pip install --upgrade codecov
   - pip install --upgrade flake8
+  - pip install --upgrade pep8-naming
   - if [[ "$TEST_SUITE" == "doc" ]]; then pip install --upgrade -r lib/spack/docs/requirements.txt; fi
 
 before_script: