diff --git a/.travis.yml b/.travis.yml
index 7a4845f..b73c0b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ install:
   - pip install codecov
 # run tests
 script:
-  - pytest
+  - pytest --cov=pyhamtools
   - cd docs
   # build the docs on 2.7 and 3.6 (sphinx requires 2.7 or >=3.4)
   - if [[ $TRAVIS_PYTHON_VERSION == 2.7 ]]; then make html; fi
diff --git a/requirements-pytest.txt b/requirements-pytest.txt
index 95f2aab..ca1f783 100644
--- a/requirements-pytest.txt
+++ b/requirements-pytest.txt
@@ -1,3 +1,4 @@
 pytest>=3.3.2
 pytest-blockage>=0.2.0
 pytest-localserver>=0.4.1
+pytest-cov>=2.5.1