diff --git a/tox.ini b/tox.ini
index 5d4d9d214..4fe8b7ca6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,7 +36,7 @@ setenv =
   SETUPTOOLS_USE_DISTUTILS=stdlib
 
   JUNIT={tty::-o junit_suite_name={envname} --junit-xml=junit-{envname}.xml}
-  COVERAGE={tty::--cov-branch --cov-append --cov-report xml --cov-report html}
+  COVERAGE={tty::--cov --cov-append --cov-report xml --cov-report html --cov-config=tox.ini}
   fast: FAST=--nomigrations
   reusedb: REUSEDB=--reuse-db
   !nosw: SW={tty:--sw:}
@@ -76,6 +76,7 @@ deps =
   py3: django-filter<2.3
   drf34: djangorestframework>=3.4,<3.4.1
   drf39: djangorestframework>=3.9.2,<3.10
+usedevelop = True
 commands =
   py2: ./getlasso.sh
   py3: ./getlasso3.sh
@@ -131,3 +132,4 @@ source =
     authentic2_journal
     authentic2_provisionning_ldap
     django_rbac
+branch = True