diff --git a/setup.py b/setup.py
index 081654026f..4ecc6a3dba 100755
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,8 @@ 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('proteus')]
+tests_require = [get_require_version('proteus'),
+    get_require_version('trytond_purchase')]
 dependency_links = []
 if minor_version % 2:
     dependency_links.append('https://trydevpi.tryton.org/')
diff --git a/tests/test_project_revenue.py b/tests/test_project_revenue.py
index 89ba47adba..445998d407 100644
--- a/tests/test_project_revenue.py
+++ b/tests/test_project_revenue.py
@@ -11,6 +11,7 @@ from trytond.tests.test_tryton import doctest_checker
 class ProjectRevenueTestCase(ModuleTestCase):
     'Test ProjectRevenue module'
     module = 'project_revenue'
+    extras = ['purchase']
 
 
 def suite():