diff --git a/tox.ini b/tox.ini
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,9 @@
   .[testing]
   pytest-cov
 commands =
-  pytest --cov=swh --cov-branch {posargs}
+  pytest --cov={envsitepackagesdir}/swh/lister/ --cov-branch \
+         {envsitepackagesdir}/swh/lister/ {posargs}
+
 
 [testenv:flake8]
 skip_install = true