diff --git a/.travis.yml b/.travis.yml
index da74311..a9b5b8b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ matrix:
   allow_failures:
     - os: osx
     - rust: nightly
+      env: FEATURE=nightly
 before_script:
   - pip install 'travis-cargo<0.2' --user  && export PATH=$HOME/Library/Python/2.7/bin:$HOME/.local/bin:$PATH
 script: