diff --git a/codegen/sdk-codegen/aws-models/iot-data-plane.json b/codegen/sdk-codegen/aws-models/iot-data-plane.json
index d65b47d5e29c3..7d3d4d391fc42 100644
--- a/codegen/sdk-codegen/aws-models/iot-data-plane.json
+++ b/codegen/sdk-codegen/aws-models/iot-data-plane.json
@@ -273,7 +273,23 @@
           "method": "GET",
           "uri": "/things/{thingName}/shadow",
           "code": 200
-        }
+        },
+        "smithy.test#smokeTests": [
+          {
+            "id": "GetThingShadowFailure",
+            "params": {
+              "thingName": "fake-thing"
+            },
+            "vendorParams": {
+              "region": "us-west-2",
+              "uri": "https://data-ats.iot.us-west-2.amazonaws.com"
+            },
+            "vendorParamsShape": "aws.test#AwsVendorParams",
+            "expect": {
+              "failure": {}
+            }
+          }
+        ]
       }
     },
     "com.amazonaws.iotdataplane#GetThingShadowRequest": {