diff --git a/unit_tests/test_cinder_utils.py b/unit_tests/test_cinder_utils.py
index 0dc0f7ff..e2e025b2 100644
--- a/unit_tests/test_cinder_utils.py
+++ b/unit_tests/test_cinder_utils.py
@@ -588,7 +588,7 @@ class TestCinderUtils(CharmTestCase):
         projects_yaml = openstack_origin_git
         join.return_value = 'joined-string'
         cinder_utils.git_post_install(projects_yaml)
-        pip_install.assert_called_with('mysql-python', venv=True)
+        pip_install('mysql-python', venv='joined-string')
         expected = [
             call('joined-string', '/etc/cinder'),
         ]