diff --git a/tests/test_vox.py b/tests/test_vox.py
index f4cb22d..1dc6741 100644
--- a/tests/test_vox.py
+++ b/tests/test_vox.py
@@ -1,4 +1,5 @@
 """Vox tests"""
+
 import io
 import os
 import pathlib
diff --git a/xontrib/autovox.py b/xontrib/autovox.py
index 65d57ca..4d09102 100644
--- a/xontrib/autovox.py
+++ b/xontrib/autovox.py
@@ -8,6 +8,7 @@
 
 Developers should look at XSH.builtins.events.autovox_policy
 """
+
 import itertools
 import warnings
 from pathlib import Path
diff --git a/xontrib/vox.py b/xontrib/vox.py
index 78d891f..1d342c0 100644
--- a/xontrib/vox.py
+++ b/xontrib/vox.py
@@ -1,4 +1,5 @@
 """Python virtual environment manager for xonsh."""
+
 import os.path
 import subprocess
 import tempfile
diff --git a/xontrib/voxapi.py b/xontrib/voxapi.py
index 01c79ba..3269559 100644
--- a/xontrib/voxapi.py
+++ b/xontrib/voxapi.py
@@ -8,6 +8,7 @@
 * ``vox_on_deactivate(env: str, path: pathlib.Path) -> None``
 * ``vox_on_delete(env: str) -> None``
 """
+
 import collections.abc
 import logging
 import os