diff --git a/.travis.yml b/.travis.yml
index 2f6b3ba..c7c311c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ script:
   - if [[ $TRAVIS_PYTHON_VERSION != nightly ]]; then flake8 .; fi
   - if [[ $TRAVIS_PYTHON_VERSION != 2* ]]; then doc8 $(git ls-files '*.rst'); fi
   - yamllint --strict $(git ls-files '*.yaml' '*.yml')
-  - coverage run --source=yamllint setup.py test
+  - coverage run --source=yamllint -m unittest discover
   - if [[ $TRAVIS_PYTHON_VERSION != 2* ]]; then
       python setup.py build_sphinx;
     fi
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index af32122..f57ec5e 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -13,7 +13,9 @@ Pull Request Process
 
    .. code:: bash
 
-    python setup.py test
+    pip install --user .
+    python -m unittest discover  # all tests...
+    python -m unittest tests/rules/test_commas.py  # or just some tests (faster)
 
 3. If you add code that should be tested, add tests.