diff --git a/tox.ini b/tox.ini
index 6fd7f2a3..e35d1144 100644
--- a/tox.ini
+++ b/tox.ini
@@ -66,7 +66,8 @@ source =
     .
 omit =
     .tox/*
-    charmhelpers/*
+    */charmhelpers/*
+    unit_tests/*
 
 [testenv:venv]
 basepython = python3