diff --git a/.travis.yml b/.travis.yml
index e84d8f2..c4301f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: python
 cache:
   directories:
     - .tox
+    - .pytest_cache
     - tests/testdata
 python:
   - "2.7"