diff --git a/.travis.yml b/.travis.yml
index f956c3be..d6413fe9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,8 @@ matrix:
     - BIGCHAINDB_DATABASE_BACKEND=localmongodb
     - BIGCHAINDB_DATABASE_SSL=
     - BIGCHAINDB_CI_ABCI=enable
-  - env:
+  - python: 3.6
+    env:
     - BIGCHAINDB_ACCEPTANCE_TEST=enable
 
 before_install: sudo .ci/travis-before-install.sh