diff --git a/.travis.yml b/.travis.yml
index 29420f4..317e9a6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ language: generic
 branches:
   only:
     - master
+env:
+  - BUILD_DOCX=true
 before_install:
   - wget https://repo.continuum.io/miniconda/Miniconda3-4.5.11-Linux-x86_64.sh
     --output-document miniconda.sh