diff --git a/tests/v1/engine/test_engine_core_client.py b/tests/v1/engine/test_engine_core_client.py
index 3e1aa56882..ae072a47e7 100644
--- a/tests/v1/engine/test_engine_core_client.py
+++ b/tests/v1/engine/test_engine_core_client.py
@@ -306,6 +306,7 @@ def test_kv_cache_events(
                 eos_token_id=None,
                 arrival_time=time.time(),
                 lora_request=None,
+                cache_salt=None,
             )
             client.add_request(request)