diff --git a/proteus/tests/__init__.py b/proteus/tests/__init__.py
index 2e092c4bd8..30637cfdb0 100644
--- a/proteus/tests/__init__.py
+++ b/proteus/tests/__init__.py
@@ -14,7 +14,7 @@ from trytond.tests.test_tryton import (  # noqa: E402
     doctest_setup, doctest_teardown)
 
 here = os.path.dirname(__file__)
-readme = os.path.normpath(os.path.join(here, '..', '..', 'README'))
+readme = os.path.normpath(os.path.join(here, '..', '..', 'README.rst'))
 
 
 def test_suite():