diff --git a/app/scodoc/sco_cache.py b/app/scodoc/sco_cache.py
index 2e9792e41..8fcc6f7ef 100644
--- a/app/scodoc/sco_cache.py
+++ b/app/scodoc/sco_cache.py
@@ -228,7 +228,7 @@ def invalidate_formsemestre(  # was inval_cache(formsemestre_id=None, pdfonly=Fa
     if getattr(g, "defer_cache_invalidation", False):
         g.sem_to_invalidate.add(formsemestre_id)
         return
-    log("inval_cache, formsemestre_id={formsemestre_id} pdfonly={pdfonly}")
+    log(f"inval_cache, formsemestre_id={formsemestre_id} pdfonly={pdfonly}")
     if formsemestre_id is None:
         # clear all caches
         log("----- invalidate_formsemestre: clearing all caches -----")
@@ -272,7 +272,7 @@ def invalidate_formsemestre(  # was inval_cache(formsemestre_id=None, pdfonly=Fa
     SemBulletinsPDFCache.invalidate_sems(formsemestre_ids)
 
 
-class DefferedSemCacheManager:
+class DeferredSemCacheManager:
     """Contexte pour effectuer des opérations indépendantes dans la
     même requete qui invalident le cache. Par exemple, quand on inscrit
     des étudiants un par un à un semestre, chaque inscription va invalider
diff --git a/app/scodoc/sco_synchro_etuds.py b/app/scodoc/sco_synchro_etuds.py
index 67ac5a6c7..9a13a8f5c 100644
--- a/app/scodoc/sco_synchro_etuds.py
+++ b/app/scodoc/sco_synchro_etuds.py
@@ -252,7 +252,7 @@ def formsemestre_synchro_etuds(
             etudids_a_desinscrire = [nip2etudid(x) for x in a_desinscrire]
             etudids_a_desinscrire += a_desinscrire_without_key
             #
-            with sco_cache.DefferedSemCacheManager():
+            with sco_cache.DeferredSemCacheManager():
                 do_import_etuds_from_portal(sem, a_importer, etudsapo_ident)
                 sco_inscr_passage.do_inscrit(sem, etudids_a_inscrire)
                 sco_inscr_passage.do_desinscrit(sem, etudids_a_desinscrire)