diff --git a/selfprivacy_api/backup/__init__.py b/selfprivacy_api/backup/__init__.py
index dac10f2..f4d7ab2 100644
--- a/selfprivacy_api/backup/__init__.py
+++ b/selfprivacy_api/backup/__init__.py
@@ -254,7 +254,7 @@ class Backups:
                 f"snapshot has a nonexistent service: {snapshot.service_name}"
             )
 
-        needed_space = Backups.service_snapshot_size(snapshot.id)
+        needed_space = Backups.snapshot_restored_size(snapshot.id)
         available_space = Backups.space_usable_for_service(service)
         if needed_space > available_space:
             raise ValueError(
@@ -315,7 +315,7 @@ class Backups:
             Storage.cache_snapshot(snapshot)
 
     @staticmethod
-    def service_snapshot_size(snapshot_id: str) -> int:
+    def snapshot_restored_size(snapshot_id: str) -> int:
         return Backups.provider().backupper.restored_size(
             snapshot_id,
         )
diff --git a/tests/test_graphql/test_backup.py b/tests/test_graphql/test_backup.py
index c882372..bf1be69 100644
--- a/tests/test_graphql/test_backup.py
+++ b/tests/test_graphql/test_backup.py
@@ -232,7 +232,7 @@ def test_restore(backups, dummy_service):
 def test_sizing(backups, dummy_service):
     Backups.back_up(dummy_service)
     snap = Backups.get_snapshots(dummy_service)[0]
-    size = Backups.service_snapshot_size(snap.id)
+    size = Backups.snapshot_restored_size(snap.id)
     assert size is not None
     assert size > 0