diff --git a/tests/test_cli.py b/tests/test_cli.py
index 5c85c2191562391601dcf77f1615493dd352f3fb..9af48c82047dad7e271bbf17b4fdf5b5a81d062b 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -61,7 +61,7 @@ JSON_PATH = Path(__file__).parent / "test_cli.hjson"  # external test definition
 # ───────────────────────────────────────────────────────────────────────────────
 # Load & validate test cases from JSON
 # ───────────────────────────────────────────────────────────────────────────────
-with JSON_PATH.open() as f:
+with open(JSON_PATH, encoding="utf-8") as f:
     CLI_TEST_CASES: List[Dict[str, Any]] = hjson.load(f)
 
 logger.info("Loaded %d test cases from %s", len(CLI_TEST_CASES), JSON_PATH)
@@ -322,11 +322,18 @@ def test_help_flag_writes_usage(cli_path: str, out_dir: Path) -> None:
 # Skip tests that depend on filesystem permission errors when running as root,
 # since root privileges override normal file permission checks.
 skip_if_root = pytest.mark.skipif(
-    os.geteuid() == 0, reason="Skipping tests requiring permission errors under root"
+    os.name == "posix" and os.geteuid() == 0,
+    reason="Skipping tests requiring permission errors under root",
+)
+
+# Skip test on Windows ex: POSIX style directory permissions test
+skip_on_windows = pytest.mark.skipif(
+    sys.platform == "win32", reason="Skipping permission based tests on Windows"
 )
 
 
 @skip_if_root
+@skip_on_windows
 @pytest.mark.cli
 def test_output_to_unwritable_directory(
     cli_path: str, mobilenet_tflite: Path, out_dir: Path