diff --git a/jsx/src/components/GroupEdit/GroupEdit.jsx b/jsx/src/components/GroupEdit/GroupEdit.jsx
index 22e96abe..79db6634 100644
--- a/jsx/src/components/GroupEdit/GroupEdit.jsx
+++ b/jsx/src/components/GroupEdit/GroupEdit.jsx
@@ -110,6 +110,7 @@ const GroupEdit = (props) => {
             data-testid="submit"
             className="btn btn-primary"
             onClick={() => {
+              // check for changes
               let new_users = selected.filter(
                 (e) => !group_data.users.includes(e),
               );
diff --git a/jupyterhub/app.py b/jupyterhub/app.py
index f339dbe9..6c7ddf75 100644
--- a/jupyterhub/app.py
+++ b/jupyterhub/app.py
@@ -310,6 +310,9 @@ class JupyterHub(Application):
         Loading one set of groups, then starting JupyterHub again with a different
         set will not remove users or groups from previous launches.
         That must be done through the API.
+
+        .. versionchanged:: 3.2
+        Changed format of group from list of usernames to dict
         """,
     ).tag(config=True)
 
diff --git a/jupyterhub/tests/test_app.py b/jupyterhub/tests/test_app.py
index 215520c0..65f99c56 100644
--- a/jupyterhub/tests/test_app.py
+++ b/jupyterhub/tests/test_app.py
@@ -30,7 +30,7 @@ def test_help_all():
     assert '--JupyterHub.ip' in out
 
 
-@pytest.mark.skipif(V(traitlets.__version__) < V('5'), reason="requires traitlets 5")
+@pytest.mark.skipif(traitlets.version_info < (5,), reason="requires traitlets 5")
 def test_show_config(tmpdir):
     tmpdir.chdir()
     p = Popen(