diff --git a/.travis.yml b/.travis.yml
index 2b5b6613c..40107335e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,7 +28,7 @@ install:
   - travis_retry pip install --upgrade tox tox-travis codecov
 
 script:
-  - tox -c tox-travis.ini
+  - tox -c tox-travis.ini -p auto -o
 
 after_success:
   - travis_retry codecov --flags codegenunittests --file codegen.xml