diff --git a/testing/test_pytest_html.py b/testing/test_pytest_html.py
index ac9a1500..35951127 100644
--- a/testing/test_pytest_html.py
+++ b/testing/test_pytest_html.py
@@ -107,7 +107,6 @@ def test_sleep():
     def test_can_format_duration_column(
         self, testdir, duration_formatter, expected_report_content
     ):
-
         testdir.makeconftest(
             f"""
             import pytest