diff --git a/ptvp35/__init__.py b/ptvp35/__init__.py
index 7a3d0c0..d736f73 100644
--- a/ptvp35/__init__.py
+++ b/ptvp35/__init__.py
@@ -225,9 +225,12 @@ class DbConnection:
         while True:
             await self._background_cycle()
 
+    def _copy_sync(self):
+        shutil.copyfile(self.__path_backup, self.__path)
+
     async def _copy(self):
         with concurrent.futures.ThreadPoolExecutor() as pool:
-            await self.__loop.run_in_executor(pool, shutil.copyfile, self.__path_backup, self.__path)
+            await self.__loop.run_in_executor(pool, self._copy_sync)
 
     async def _finish_recovery(self):
         await self._copy()