diff --git a/.travis.yml b/.travis.yml
index 13ede246..26e70212 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ services:
 install:
  - pip install -U pip wheel
  - pip install -r requirements.txt
+ - pip list
 before_script:
   - openssl version -a
 script: