diff --git a/.gitignore b/.gitignore
index 2a88a24..e1b15b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,6 @@ output/*/index.html
 
 # Sphinx
 docs/_build
+
+# Coverage
+htmlcov
diff --git a/Makefile b/Makefile
index 5e09cf6..feaf8f0 100644
--- a/Makefile
+++ b/Makefile
@@ -21,6 +21,12 @@ test:
 testall:
 	tox
 
+coverage:
+	coverage run --source complexity setup.py test
+	coverage report -m
+	coverage html
+	open htmlcov/index.html
+
 docs:
 	$(MAKE) -C docs clean
 	$(MAKE) -C docs html