diff --git a/pkgs/development/python-modules/tinycss2/default.nix b/pkgs/development/python-modules/tinycss2/default.nix
index 6f4eb927f3a..35c0f76b084 100644
--- a/pkgs/development/python-modules/tinycss2/default.nix
+++ b/pkgs/development/python-modules/tinycss2/default.nix
@@ -36,6 +36,11 @@ buildPythonPackage rec {
 
   checkInputs = [ pytest pytestrunner pytestcov pytest-flake8 pytest-isort ];
 
+  # https://github.com/PyCQA/pycodestyle/issues/598
+  preCheck = ''
+    printf "[flake8]\nignore=W504,E741,E126" >> setup.cfg
+  '';
+
   meta = with lib; {
     description = "Low-level CSS parser for Python";
     homepage = "https://github.com/Kozea/tinycss2";