diff --git a/src/lighteval/tasks/lighteval_task.py b/src/lighteval/tasks/lighteval_task.py
index ea01f81e..b2f26850 100644
--- a/src/lighteval/tasks/lighteval_task.py
+++ b/src/lighteval/tasks/lighteval_task.py
@@ -130,7 +130,7 @@ def __post_init__(self):
         self.hf_avail_splits = tuple(self.hf_avail_splits) if self.hf_avail_splits is not None else None
         self.evaluation_splits = tuple(self.evaluation_splits)
         self.suite = tuple(self.suite)
-        self.stop_sequence = tuple(self.stop_sequence) if self.stop_sequence is not None else None
+        self.stop_sequence = tuple(self.stop_sequence) if self.stop_sequence is not None else ()
 
     def print(self):
         md_writer = MarkdownTableWriter()