diff --git a/integration-tests/test_hub.py b/integration-tests/test_hub.py
index 48ad4d7..d47893d 100644
--- a/integration-tests/test_hub.py
+++ b/integration-tests/test_hub.py
@@ -156,7 +156,7 @@ async def test_user_group_adding():
     system('groupadd somegroup')
 
     assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'set', 'auth.type', 'dummyauthenticator.DummyAuthenticator')).wait()
-    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'add-item', 'users.groups.somegroup', username)).wait()
+    assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'add-item', 'users.extra_user_groups.somegroup', username)).wait()
     assert 0 == await (await asyncio.create_subprocess_exec(*TLJH_CONFIG_PATH, 'reload')).wait()
 
     try:
diff --git a/tests/test_configurer.py b/tests/test_configurer.py
index 3cc3c20..1857af5 100644
--- a/tests/test_configurer.py
+++ b/tests/test_configurer.py
@@ -129,22 +129,22 @@ def test_auth_dummy():
     assert c.JupyterHub.authenticator_class == 'dummyauthenticator.DummyAuthenticator'
     assert c.DummyAuthenticator.password == 'test'
 
-
+from traitlets import Dict
 def test_user_groups():
     """
     Test setting user groups
     """
     c = apply_mock_config({
         'users': {
-            'groups': {
+            'extra_user_groups': {
                 "g1": ["u1", "u2"],
-                "g1": ["u3", "u4"]
+                "g2": ["u3", "u4"]
             },
         }
     })
     assert c.UserCreatingSpawner.user_groups == {
                 "g1": ["u1", "u2"],
-                "g1": ["u3", "u4"]
+                "g2": ["u3", "u4"]
             }
 
 
diff --git a/tljh/configurer.py b/tljh/configurer.py
index b045f2b..eb5664b 100644
--- a/tljh/configurer.py
+++ b/tljh/configurer.py
@@ -27,7 +27,7 @@ default = {
         'allowed': [],
         'banned': [],
         'admin': [],
-        'groups': {}
+        'extra_user_groups': {}
     },
     'limits': {
         'memory': None,
@@ -175,7 +175,7 @@ def update_usergroups(c, config):
     Set user groups
     """
     users = config['users']
-    c.UserCreatingSpawner.user_groups = users['groups']
+    c.UserCreatingSpawner.user_groups = users['extra_user_groups']
 
 
 def update_limits(c, config):
diff --git a/tljh/jupyterhub_config.py b/tljh/jupyterhub_config.py
index 11ee138..325d9c6 100644
--- a/tljh/jupyterhub_config.py
+++ b/tljh/jupyterhub_config.py
@@ -13,7 +13,7 @@ from tljh.normalize import generate_system_username
 from tljh.yaml import yaml
 from jupyterhub_traefik_proxy import TraefikTomlProxy
 
-from traitlets import Any
+from traitlets import Dict
 
 class UserCreatingSpawner(SystemdSpawner):
     """
@@ -21,7 +21,7 @@ class UserCreatingSpawner(SystemdSpawner):
 
     FIXME: Remove this somehow?
     """
-    user_groups = Any(config=True)
+    user_groups = Dict(config=True)
 
     def start(self):
         """