diff --git a/.gitignore b/.gitignore
index a3866ff..42bbfb5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@
 build/
 dist/
 MySQLdb/release.py
+.coverage
diff --git a/tox.ini b/tox.ini
index 831b12e..131a497 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,5 +2,9 @@
 envlist = py26, py27, pypy, py33, py34
 
 [testenv]
-commands = py.test
-deps = pytest
+commands =
+    py.test --cov {envsitepackagesdir}/MySQLdb
+deps =
+    coverage==3.7.1
+    pytest
+    pytest-cov