diff --git a/.travis.yml b/.travis.yml
index 3d8c7aee..a7f2f637 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ install:
 - pip install -r dev_requirements.txt
 
 script:
-- PYTHONPATH=. ${TRAVIS_BUILD_DIR}/test.sh
+- MITOGEN_LOG_LEVEL=debug PYTHONPATH=. ${TRAVIS_BUILD_DIR}/test.sh
 
 services:
   - docker