diff --git a/.travis.yml b/.travis.yml
index 6001c91..339531a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ install:
   - pip install -r requirements-dev.txt
   - pip install coveralls
 # command to run tests
+before_script: python setup.py build_ext --inplace
 script: nosetests --with-coverage --cover-package=schemamessages
 after_success:
   coveralls
\ No newline at end of file