diff --git a/python/ray/serve/tests/test_config.py b/python/ray/serve/tests/test_config.py
index af6958d13..7c9b3ad26 100644
--- a/python/ray/serve/tests/test_config.py
+++ b/python/ray/serve/tests/test_config.py
@@ -129,7 +129,7 @@ def test_replica_config_validation():
     with pytest.raises(ValueError):
         ReplicaConfig(Class, ray_actor_options={"name": None})
     with pytest.raises(ValueError):
-        ReplicaConfig(Class, ray_actor_options={"detached": None})
+        ReplicaConfig(Class, ray_actor_options={"lifetime": None})
     with pytest.raises(ValueError):
         ReplicaConfig(Class, ray_actor_options={"max_restarts": None})