diff --git a/opencompass/openicl/icl_retriever/icl_zero_retriever.py b/opencompass/openicl/icl_retriever/icl_zero_retriever.py
index c63d6cf5..28b923cc 100644
--- a/opencompass/openicl/icl_retriever/icl_zero_retriever.py
+++ b/opencompass/openicl/icl_retriever/icl_zero_retriever.py
@@ -22,8 +22,8 @@ class ZeroRetriever(BaseRetriever):
     def __init__(self, dataset, ice_eos_token: Optional[str] = '') -> None:
         super().__init__(dataset, '', ice_eos_token, 0)
 
-    def retrieve(self, id_list: List[int]=[]) -> List[List]:
-        if id_list:
+    def retrieve(self, id_list: List[int] = None) -> List[List]:
+        if id_list is not None:
             get_logger().warning('id_list is not empty, but will be ignored.')
         rtr_idx_list = [[] for _ in range(len(self.test_ds))]
         return rtr_idx_list