diff --git a/tests/_mocks.py b/tests/_mocks.py
index b3234d3..a222702 100644
--- a/tests/_mocks.py
+++ b/tests/_mocks.py
@@ -2,6 +2,8 @@
 from pathlib import Path
 from typing import Any, Dict, Mapping, Optional, Sequence
 
+import requests
+
 from dbtmetabase.core import DbtMetabase
 from dbtmetabase.manifest import Manifest, Model
 from dbtmetabase.metabase import Metabase
@@ -37,6 +39,10 @@ def _api(
             if json_path.exists():
                 with open(json_path, encoding="utf-8") as f:
                     return json.load(f)
+            else:
+                response = requests.Response()
+                response.status_code = 404
+                raise requests.exceptions.HTTPError(response=response)
         return {}
 
 
diff --git a/tests/fixtures/api/collection/3/items.json b/tests/fixtures/api/collection/3/items.json
index 523238c..e5e7a91 100644
--- a/tests/fixtures/api/collection/3/items.json
+++ b/tests/fixtures/api/collection/3/items.json
@@ -253,5 +253,21 @@
         },
         "favorite": false,
         "model": "card"
+    },
+    {
+        "description": null,
+        "collection_position": null,
+        "name": "Missing",
+        "id": 404,
+        "display": "scalar",
+        "last-edit-info": {
+            "id": 1,
+            "last_name": "",
+            "first_name": "dbtmetabase",
+            "email": "user@example.com",
+            "timestamp": "2021-07-21T08:01:37.449936Z"
+        },
+        "favorite": false,
+        "model": "card"
     }
-]
\ No newline at end of file
+]