From d9375b92a7f203e812337b45bab3885772db3fc9 Mon Sep 17 00:00:00 2001
From: martinRenou <martin.renou@gmail.com>
Date: Tue, 21 Mar 2023 11:07:40 +0100
Subject: [PATCH] Fix tests

---
 ipywidgets/widgets/tests/utils.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ipywidgets/widgets/tests/utils.py b/ipywidgets/widgets/tests/utils.py
index 86163a5a28..95a0bffc42 100644
--- a/ipywidgets/widgets/tests/utils.py
+++ b/ipywidgets/widgets/tests/utils.py
@@ -34,13 +34,18 @@ def send(self, *args, **kwargs):
     def close(self, *args, **kwargs):
         pass
 
+class DummyCommManager():
+
+    def unregister_comm(self, comm):
+        pass
+
 
 def dummy_create_comm(**kwargs):
     return DummyComm()
 
 
 def dummy_get_comm_manager(**kwargs):
-    return {}
+    return DummyCommManager()
 
 
 _widget_attrs = {}