diff --git a/openedx/features/course_experience/utils.py b/openedx/features/course_experience/utils.py
index 031e1d1f05..4ac955766f 100644
--- a/openedx/features/course_experience/utils.py
+++ b/openedx/features/course_experience/utils.py
@@ -51,7 +51,7 @@ def get_course_outline_block_tree(request, course_id, user=None, allow_start_dat
         is_scored = block.get('has_score', False) and block.get('weight', 1) > 0
         # Use a list comprehension to force the recursion over all children, rather than just stopping
         # at the first child that is scored.
-        children_scored = any(recurse_mark_scored(child) for child in block.get('children', []))
+        children_scored = any(tuple(recurse_mark_scored(child) for child in block.get('children', [])))
         if is_scored or children_scored:
             block['scored'] = True
             return True