diff --git a/.travis.yml b/.travis.yml
index 4861c3d..eb3061c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ before_install:
 install:
 - python setup.py install
 script:
-- pytest
+- pytest --cov=astro
 after_success:
 - coveralls
 deploy:
diff --git a/requirements.txt b/requirements.txt
index 533641f..a933fc5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,6 @@ matplotlib
 kinematics
 spiceypy
 spacetrack
+coveralls
 pytest
 pytest-cov