diff --git a/pyhilo/device/graphql_value_mapper.py b/pyhilo/device/graphql_value_mapper.py
index ac5765c..5399a44 100644
--- a/pyhilo/device/graphql_value_mapper.py
+++ b/pyhilo/device/graphql_value_mapper.py
@@ -76,7 +76,7 @@ def _map_to_device_reading(
 
     def _build_smart_meter(self, device: Dict[str, Any]) -> list[Dict[str, Any]]:
         attributes = []
-        if device.get("zigbeeChannel") is not None:
+        if device.get("zigBeeChannel") is not None:
             attributes.append(
                 self.build_attribute(
                     device["hiloId"], "ZigbeeChannel", device["zigBeeChannel"]
diff --git a/tests/test_graphql_value_mapper.py b/tests/test_graphql_value_mapper.py
new file mode 100644
index 0000000..3dac709
--- /dev/null
+++ b/tests/test_graphql_value_mapper.py
@@ -0,0 +1,23 @@
+"""Tests for mapping GraphQL subscription payloads to device attributes."""
+
+import json
+from pathlib import Path
+
+from pyhilo.device.graphql_value_mapper import GraphqlValueMapper
+
+PAYLOADS = Path(__file__).parent.parent / "doc" / "graphql"
+
+
+def _device(filename: str) -> dict:
+    payload = json.loads((PAYLOADS / filename).read_text(encoding="utf-8"))
+    return payload["data"]["onAnyDeviceUpdated"]["device"]
+
+
+def test_smart_meter_maps_zigbee_channel() -> None:
+    """The meter's Zigbee channel is reported as the ZigbeeChannel attribute."""
+    attributes = GraphqlValueMapper().map_device_subscription_values(
+        _device("onAnyDeviceUpdated-meter.json")
+    )
+
+    channel = [a["value"] for a in attributes if a["attribute"] == "ZigbeeChannel"]
+    assert channel == [24]