diff --git a/.travis.yml b/.travis.yml
index b0e1c446d17..57d7222d927 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ sudo: false
 language: python
 cache:
   directories:
-    - $HOME/.cache/pip
+    - $VIRTUAL_ENV/lib
 python:
   - "3.4"
 install: