diff --git a/homeassistant/components/tuya/diagnostics.py b/homeassistant/components/tuya/diagnostics.py
index f0e5ed2852f..67bbad0aceb 100644
--- a/homeassistant/components/tuya/diagnostics.py
+++ b/homeassistant/components/tuya/diagnostics.py
@@ -157,7 +157,7 @@ def _async_device_as_dict(hass: HomeAssistant, device: TuyaDevice) -> dict[str,
             state = hass.states.get(entity_entry.entity_id)
             state_dict = None
             if state:
-                state_dict = state.as_dict()
+                state_dict = dict(state.as_dict())
 
                 # Redact the `entity_picture` attribute as it contains a token.
                 if "entity_picture" in state_dict["attributes"]: