diff --git a/.travis.yml b/.travis.yml
index 3f289e0..bae3072 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ python:
     - pypy
 install:
     - python bootstrap.py
-    - bin/buildout
+    - bin/buildout -n
 script:
     - bin/test-ztk
 notifications: