diff --git a/src/tox/config/loader/toml/__init__.py b/src/tox/config/loader/toml/__init__.py
index 9c271a3a1..c164e040a 100644
--- a/src/tox/config/loader/toml/__init__.py
+++ b/src/tox/config/loader/toml/__init__.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import TYPE_CHECKING, Dict, Iterator, List, Mapping, Set, TypeVar, cast
+from typing import TYPE_CHECKING, Dict, Iterator, List, Mapping, TypeVar, cast
 
 from tox.config.loader.api import ConfigLoadArgs, Loader, Override
 from tox.config.types import Command, EnvList