diff --git a/tests/integration/_support/client.py b/tests/integration/_support/client.py
index 7b95f2b1a3c..04997208096 100644
--- a/tests/integration/_support/client.py
+++ b/tests/integration/_support/client.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 import os
 import time
 import uuid
-from collections.abc import Callable, Iterator, Mapping
+from collections.abc import Callable, Iterator, Mapping, Sequence
 from contextlib import ExitStack, contextmanager
 from dataclasses import dataclass
 from hashlib import sha256
@@ -22,6 +22,11 @@ def object_value(value: JsonValue) -> dict[str, JsonValue]:
     return JSON_OBJECT.validate_python(value)
 
 
+def list_value(value: JsonValue) -> Sequence[JsonValue]:
+    assert isinstance(value, list), f"Expected a list, received {type(value).__name__}"
+    return value
+
+
 def string_value(value: JsonValue) -> str:
     assert isinstance(value, str), f"Expected a string, received {type(value).__name__}"
     return value