diff --git a/.coveragerc b/.coveragerc
index 4be9bb19b03..481486f434e 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,9 +1,12 @@
 [run]
-source=matplotlib
+source=
+    matplotlib
+    mpl_toolkits
 [report]
 omit =
     lib/matplotlib/tests/*
     lib/matplotlib/testing/*
+    lib/mpl_toolkits/tests/*
 
 exclude_lines =
     raise NotImplemented