diff --git a/.travis.yml b/.travis.yml
index 09ed267..fd55c4d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,7 @@ script:
   - coverage run setup.py test && python3 setup.py install
   - domain2idna -d аррӏе.com
   - domain2idna -f .travis/list_of_domain
+  - domain2idna -f .travis/list_of_domain -o list_of_domain_converted
   - echo "Tests linting " && pylint tests/*.py && echo "domain2idna linting" && pylint domain2idna
 
 after_success: