diff --git a/homeassistant/components/honeywell/diagnostics.py b/homeassistant/components/honeywell/diagnostics.py
index b489eb4a596..35624c8fc39 100644
--- a/homeassistant/components/honeywell/diagnostics.py
+++ b/homeassistant/components/honeywell/diagnostics.py
@@ -16,19 +16,13 @@ async def async_get_config_entry_diagnostics(
     config_entry: ConfigEntry,
 ) -> dict[str, Any]:
     """Return diagnostics for a config entry."""
+    honeywell: HoneywellData = hass.data[DOMAIN][config_entry.entry_id]
 
-    Honeywell: HoneywellData = hass.data[DOMAIN][config_entry.entry_id]
-    diagnostics_data = {}
-
-    for device, module in Honeywell.devices.items():
-        diagnostics_data.update(
-            {
-                f"Device {device}": {
-                    "UI Data": module.raw_ui_data,
-                    "Fan Data": module.raw_fan_data,
-                    "DR Data": module.raw_dr_data,
-                }
-            }
-        )
-
-    return diagnostics_data
+    return {
+        f"Device {device}": {
+            "UI Data": module.raw_ui_data,
+            "Fan Data": module.raw_fan_data,
+            "DR Data": module.raw_dr_data,
+        }
+        for device, module in honeywell.devices.items()
+    }