diff --git a/pyproject.toml b/pyproject.toml
index b7564a4..303fef2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,7 +61,7 @@ weasyprint = 'weasyprint.__main__:main'
 exclude = ['.*', 'tests/results']
 
 [tool.pytest.ini_options]
-addopts = '--isort --flake8 --cov --no-cov-on-fail'
+addopts = '--cov --no-cov-on-fail'
 
 [tool.coverage.run]
 branch = true