diff --git a/.travis.yml b/.travis.yml
index a2e5628..5ff663d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ before_install:
   - python --version
   - pip install -U pip
   - pip install -U pytest
+  - pip install coverage
   - pip install pytest pytest-cov
 script:
   - cd tests