diff --git a/.travis.yml b/.travis.yml
index 218c27e7..304d68ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ python:
   # - "3.8-dev"
 install:
   - pip install -r requirements.txt
+  - pip install pytest-cov
   - pip install codecov
 script:
   - python -m pytest --cov=nw -v