diff --git a/antarest/study/storage/auto_archive_service.py b/antarest/study/storage/auto_archive_service.py
index dc2795bfa4..23e5914d8c 100644
--- a/antarest/study/storage/auto_archive_service.py
+++ b/antarest/study/storage/auto_archive_service.py
@@ -48,9 +48,8 @@ def _try_archive_studies(self) -> None:
             study_ids_to_archive = [
                 (study.id, isinstance(study, RawStudy))
                 for study in studies
-                if ((study.last_access or study.updated_at) < old_date)
-                and isinstance(study, VariantStudy)
-                or not study.archived
+                if (study.last_access or study.updated_at) < old_date
+                and (isinstance(study, VariantStudy) or not study.archived)
             ]
         for study_id, is_raw_study in study_ids_to_archive[0 : self.max_parallel]:
             try:
@@ -87,10 +86,10 @@ def _try_archive_studies(self) -> None:
 
     def _try_clear_snapshot(self) -> None:
         # convert days in hours
-        hours_of_lifespan = hours=self.config.storage.variant_snapshot_lifespan_days * 24
+        hours_of_lifespan = self.config.storage.variant_snapshot_lifespan_days * 24
 
         self.study_service.storage_service.variant_study_service.clear_all_snapshots(
-            hours_of_lifespan
+            datetime.timedelta(hours=hours_of_lifespan)
         )
 
     def _loop(self) -> None:
diff --git a/tests/storage/business/test_autoarchive_service.py b/tests/storage/business/test_autoarchive_service.py
index 52fb4d436d..7d1b0c94a7 100644
--- a/tests/storage/business/test_autoarchive_service.py
+++ b/tests/storage/business/test_autoarchive_service.py
@@ -69,18 +69,6 @@ def test_auto_archival(tmp_path: Path):
                 id="e",
                 updated_at=now - datetime.timedelta(days=61),
             ),
-            VariantStudy(
-                id="f",
-                updated_at=now - datetime.timedelta(days=0),
-            ),
-            VariantStudy(
-                id="g",
-                updated_at=now - datetime.timedelta(days=1),
-            ),
-            VariantStudy(
-                id="h",
-                last_access=now - datetime.timedelta(days=2)
-            )
         ]
     )
     db_session.commit()
@@ -109,7 +97,8 @@ def test_auto_archival(tmp_path: Path):
     # Check that the variant outputs are deleted for the variant study "e"
     study_service.archive_outputs.assert_called_once_with("e", params=RequestParameters(DEFAULT_ADMIN_USER))
 
-    # Test auto snapshot clearing
+    # Check if the `clear_all_snapshots` method was called with default values
     auto_archive_service._try_clear_snapshot()
-
-    # Check if variant snapshots with date older than variant_snapshot_lifespan_days argument are cleared
+    study_service.storage_service.variant_study_service.clear_all_snapshots.assert_called_once_with(
+        datetime.timedelta(hours=24),
+    )