diff --git a/cratedb_toolkit/cfr/cli.py b/cratedb_toolkit/cfr/cli.py
index e38b7950..15dccfd7 100644
--- a/cratedb_toolkit/cfr/cli.py
+++ b/cratedb_toolkit/cfr/cli.py
@@ -2,8 +2,6 @@
 # Distributed under the terms of the AGPLv3 license, see LICENSE.
 import logging
 import sys
-import tempfile
-from pathlib import Path
 
 import click
 from click_aliases import ClickAliasedGroup
diff --git a/cratedb_toolkit/cfr/systable.py b/cratedb_toolkit/cfr/systable.py
index 3ffdd98a..dc7f67fa 100644
--- a/cratedb_toolkit/cfr/systable.py
+++ b/cratedb_toolkit/cfr/systable.py
@@ -192,6 +192,7 @@ def make_tarfile(source_folder: Path, target_file_path: Path) -> Path:
             tar.add(source_folder.absolute(), arcname=os.path.basename(source_folder))
         return target_file_path
 
+
 class SystemTableImporter:
     """
     Import schema and data about CrateDB system tables.