diff --git a/app/scodoc/sco_formsemestre_validation.py b/app/scodoc/sco_formsemestre_validation.py
index 68a18d60..7c68ddf9 100644
--- a/app/scodoc/sco_formsemestre_validation.py
+++ b/app/scodoc/sco_formsemestre_validation.py
@@ -1399,7 +1399,7 @@ def check_formation_ues(formation: Formation) -> tuple[str, dict[int, list[Unite
         if (
             len(semestre_ids) > 1
         ):  # plusieurs semestres d'indices differents dans le cursus
-            ue_multiples[ue["ue_id"]] = sems
+            ue_multiples[ue.id] = sems
 
     if not ue_multiples:
         return "", {}
@@ -1423,12 +1423,12 @@ def check_formation_ues(formation: Formation) -> tuple[str, dict[int, list[Unite
             ]
             slist = ", ".join(
                 [
-                    """%(titreannee)s (<em>semestre <b class="fontred">%(semestre_id)s</b></em>)"""
-                    % s
+                    f"""{s['titreannee']
+                    } (<em>semestre <b class="fontred">{s['semestre_id']}</b></em>)"""
                     for s in sems
                 ]
             )
-            H.append("<li><b>%s</b> : %s</li>" % (ue.acronyme, slist))
+            H.append(f"<li><b>{ue.acronyme}</b> : {slist}</li>")
     H.append("</ul></div>")
 
     return "\n".join(H), ue_multiples