diff --git a/tests/handlers/api/controller/test_project.py b/tests/handlers/api/controller/test_project.py
index b5ab547d..65f0333d 100644
--- a/tests/handlers/api/controller/test_project.py
+++ b/tests/handlers/api/controller/test_project.py
@@ -154,6 +154,7 @@ def test_notification_ws(http_controller, controller, project, async_run):
     assert answer["action"] == "test"
 
     async_run(http_controller.close())
+    ws.close()
 
 
 def test_export(http_controller, tmpdir, loop, project):