diff --git a/.travis.yml b/.travis.yml
index 4c3dfe1f85..f68375e939 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,4 +31,5 @@ script:
   - nimble install niminst
   - nim c --taintMode:on tests/testament/tester
   - tests/testament/tester --pedantic all
+  - ./koch csource
   - ./koch xz