diff --git a/atdb/main.py b/atdb/main.py
index 7c3b9049b2e9fca42b02d8887213522f2ff248d9..2268a3a9ed2a2457cc5aae4d26636e175ac674c0 100644
--- a/atdb/main.py
+++ b/atdb/main.py
@@ -28,7 +28,7 @@ def read_conf_file(args: Namespace, additional_location=None):
         read_files = parser.read(DEFAULT_PATH)
 
     if not read_files and (args.atdb_site is None or args.token is None):
-        raise SystemError('Missing configuration file')
+        raise SystemError("Missing configuration file")
     global_config = parser["ATDB"]
     if "url" in global_config:
         args.atdb_site = parser["ATDB"]["url"]
diff --git a/atdb/prune.py b/atdb/prune.py
index 9cedfb0beaeedd354c18944f5bc874df1b7c1d6f..b4723c5599a332fa1d295844b5fd04b8efd71686 100644
--- a/atdb/prune.py
+++ b/atdb/prune.py
@@ -87,4 +87,4 @@ def prune(args):
     if args.dry_run:
         logger.info("[dry-run] Successfully removed %s files", len(surls_to_remove))
     else:
-        logger.info("Successfully removed %s files", len(surls_to_remove))
\ No newline at end of file
+        logger.info("Successfully removed %s files", len(surls_to_remove))