diff --git a/json_to_md.py b/json_to_md.py
index 55e0c03b..fc5b64e4 100644
--- a/json_to_md.py
+++ b/json_to_md.py
@@ -12,7 +12,7 @@ def stringify(obj, indent=0):
     space = '  ' * indent
 
     if obj is None or obj == "":
-        return "None"
+        return "[]"
     elif isinstance(obj, (int, float, str, bool)):
         return str(obj)
     elif isinstance(obj, list):
@@ -52,7 +52,6 @@ def normalize_nodeid(nodeid):
 def get_details_block(summary, body, level=0, params_str=None):
     margin = 18 * level
     border = f"border-left: 2px solid #eee;" if level > 0 else ""
-    # Affiche les paramètres dans le résumé si présent
     if params_str:
         summary = f"{summary} <span style='color: #888; font-size: 0.9em;'>parameters: [{params_str}]</span>"
     return (f'<div style="margin-left: {margin}px; {border} padding-left: 8px;">\n'
@@ -222,6 +221,7 @@ def json_to_md_nested(json_path, md_path, runtime_params=None):
                     folder_body += get_details_block(f"{emoji} {short_node}", body_coll, level=2)
                 f.write(get_details_block(f"{folder_emoji} {folder} ({len(collectors)} tests)", folder_body + body_collectors, level=1))
 
+        # ---------- OTHER sections -----------
         EXCLUDED_KEYS = {'tests', 'collectors'}
 
         keys = list(data.keys())