diff --git a/.coveragerc3 b/.coveragerc3
index 541f1cde..4086cb88 100644
--- a/.coveragerc3
+++ b/.coveragerc3
@@ -4,7 +4,9 @@ data_file = .coverage3
 omit =
     setup.py
     /usr/*
+    /tmp/*
     tests/*
+    devtools/*
     .tox/*
 
 [report]