diff --git a/.travis.yml b/.travis.yml
index c5bb77e..0d8ed49 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,5 +33,6 @@ matrix:
       script: tox -e py-coverage
     - python: 3.6
       script: tox -e flake8
+      env: FLAKE8
   allow_failures:
     - python: nightly