diff --git a/vllm/v1/utils.py b/vllm/v1/utils.py
index 8e1fb18cca05b..6c01ed3de52d7 100644
--- a/vllm/v1/utils.py
+++ b/vllm/v1/utils.py
@@ -86,6 +86,9 @@ class ConstantList(Generic[T], Sequence):
     def __len__(self):
         return len(self._x)
 
+    def __repr__(self):
+        return f"ConstantList({self._x})"
+
 
 class BackgroundProcHandle:
     """