diff --git a/.travis.yml b/.travis.yml
index bc906eb..5fa1267 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -103,4 +103,5 @@ script:
 - flake8 versatileimagefield/
 - coverage run --source=versatileimagefield runtests.py
 - coverage run --source=versatileimagefield post_processor_runtests.py
+- coverage combine
 after_success: coveralls