diff --git a/tests/conftest.py b/tests/conftest.py
index ad1346489..1c9ed6377 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,11 +7,11 @@
 """
 
 import io
+import os
 import shutil
 from subprocess import PIPE, run
 from tempfile import NamedTemporaryFile
 
-import os
 import pytest
 from PIL import Image
 from weasyprint import HTML