diff --git a/tox.ini b/tox.ini
index 9064a11..a6dde5f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,6 +35,11 @@
 
 [unittest]
 plugins = nose2.plugins.junitxml
+code-directories=synchronizer
+                 model_policies
+                 steps
+                 pull_steps
+                 event_steps
 
 [junit-xml]
 path = nose2-results.xml