diff --git a/tests/test_data_dir.py b/tests/test_data_dir.py
index 3f6df87..20419c9 100644
--- a/tests/test_data_dir.py
+++ b/tests/test_data_dir.py
@@ -60,7 +60,8 @@ class TestDataDir(BaseTestCase):
         self.assertIsNone(self.data_dir.get_file("test_1", ".value"))
 
     def test_get_file_cannot_read(self) -> None:
-        self.__create_path("test_1", {".value/.value": "value"})
+        self.__create_path("test_1", {".value": "value"})
+        (self.tmp_path / "test_1" / ".value").chmod(0o300)
         self.assertIsNone(self.data_dir.get_file("test_1", ".value"))
 
     def test_get_file_invalid_path(self) -> None: