diff --git a/pkgs/development/python-modules/isort/default.nix b/pkgs/development/python-modules/isort/default.nix
index a3e935907341..100155f83a2e 100644
--- a/pkgs/development/python-modules/isort/default.nix
+++ b/pkgs/development/python-modules/isort/default.nix
@@ -52,8 +52,6 @@ buildPythonPackage rec {
     "--ignore=tests/benchmark/" # requires pytest-benchmark
     "--ignore=tests/integration/" # pulls in 10 other packages
     "--ignore=tests/unit/profiles/test_black.py" # causes infinite recursion to include black
-    # pytest.PytestRemovedIn8Warning: Passing None has been deprecated.
-    "-W" "ignore::pytest.PytestRemovedIn8Warning"
   ];
 
   disabledTests = [
@@ -74,6 +72,8 @@ buildPythonPackage rec {
     "test_value_assignment_list"
     # profiles not available
     "test_isort_supports_shared_profiles_issue_970"
+    # https://github.com/PyCQA/isort/issues/2234
+    "test_isort_should_warn_on_empty_custom_config_issue_1433"
   ];
 
   meta = with lib; {