diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000..5cd9591
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,6 @@
+[run]
+source = authority
+branch = 1
+
+[report]
+omit = *tests*,*migrations*
diff --git a/tox.ini b/tox.ini
index 95b69c4..d842538 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ envlist =
 [testenv]
 usedevelop = true
 commands =
-    coverage run -a --source=authority example/manage.py test authority exampleapp
+    coverage run -a example/manage.py test authority exampleapp
     coverage report
 deps =
     coverage