diff --git a/tests/test_config_loader.py b/tests/test_config_loader.py
index 247c41ffe..5608cde90 100644
--- a/tests/test_config_loader.py
+++ b/tests/test_config_loader.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import json
+import os
 from typing import TYPE_CHECKING
 
 import pytest
@@ -168,6 +169,7 @@ def test_persist_current_writes_env_block(tmp_path: Path, monkeypatch: pytest.Mo
     }
 
 
+@pytest.mark.skipif(os.name == "nt", reason="Unix file permissions not supported on Windows")
 def test_persist_current_sets_0600_mode(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setenv("STRIX_LLM", "persisted-model")
     target = tmp_path / "cli-config.json"