1 files changed, 1 insertions, 0 deletions

diff --git a/circle.yml b/circle.yml
index 25a96f32..58846f79 100644
--- a/circle.yml
+++ b/circle.yml
@@ -2,6 +2,7 @@ machine:
   post:
     - pyenv install 2.7.13
     - pyenv global 2.7.13 3.6.1
+    - pip install tox
 test:
   override:
     - tox
\ No newline at end of file