diff --git a/.travis.yml b/.travis.yml
index b938db9..e52813c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,5 +22,7 @@ before_script:
   - export PYTHONPATH=$PYTHONPATH:/usr/share/asciidoc/
 
 script:
+  # Source code sanity check
+  - flake hyde
   # Run Python tests and generate coverage statistics
   - nosetests