diff --git a/setup.py b/setup.py
index 3f4fd9c042..ce7dd03dfe 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,10 @@ for dep in info.get('depends', []):
         requires.append(get_require_version('trytond_%s' % dep))
 requires.append(get_require_version('trytond'))
 
-tests_require = [get_require_version('trytond_account_invoice')]
+tests_require = [
+    get_require_version('proteus'),
+    get_require_version('trytond_account_invoice'),
+    ]
 dependency_links = []
 if minor_version % 2:
     dependency_links.append(