diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 00000000..4d0c83af
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,7 @@
+[run]
+branch = True
+parallel = True
+omit =
+    *dbapi20.py
+    *decimal.py
+    *numbers.py
diff --git a/tox.ini b/tox.ini
index e7bb9713..b725d8d4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,8 @@ envlist = py25, py26, py27, py33
 setenv =
     TESTDB=travis.cnf
 commands =
-    nosetests {posargs:-w tests -v}
+    nosetests {posargs:-w tests -v --with-coverage --cover-erase}
 deps =
     ipdb
     nose
+    nosexcover