diff --git a/homeassistant/components/group/config_flow.py b/homeassistant/components/group/config_flow.py
index 28a7330a206..a5bf9e0b972 100644
--- a/homeassistant/components/group/config_flow.py
+++ b/homeassistant/components/group/config_flow.py
@@ -343,8 +343,7 @@ def ws_start_preview(
         """Forward config entry state events to websocket."""
         connection.send_message(
             websocket_api.event_message(
-                msg["id"],
-                {"attributes": attributes, "group_type": group_type, "state": state},
+                msg["id"], {"attributes": attributes, "state": state}
             )
         )
 
diff --git a/tests/components/group/test_config_flow.py b/tests/components/group/test_config_flow.py
index b244b37e072..a58e47cae71 100644
--- a/tests/components/group/test_config_flow.py
+++ b/tests/components/group/test_config_flow.py
@@ -524,7 +524,6 @@ async def test_config_flow_preview(
     msg = await client.receive_json()
     assert msg["event"] == {
         "attributes": {"friendly_name": "My group"} | extra_attributes[0],
-        "group_type": domain,
         "state": "unavailable",
     }
 
@@ -539,7 +538,6 @@ async def test_config_flow_preview(
         }
         | extra_attributes[0]
         | extra_attributes[1],
-        "group_type": domain,
         "state": group_state,
     }
     assert len(hass.states.async_all()) == 2
@@ -622,7 +620,6 @@ async def test_option_flow_preview(
     assert msg["event"] == {
         "attributes": {"entity_id": input_entities, "friendly_name": "My group"}
         | extra_attributes,
-        "group_type": domain,
         "state": group_state,
     }
     assert len(hass.states.async_all()) == 3