Fix gated repo tests (#26257)

* Fix gated repo tests

* Apply suggestions from code review

tests/utils/test_hub_utils.py

@@ -128,14 +128,14 @@ class GetFromCacheTests(unittest.TestCase):
 
             self.assertIsNone(get_file_from_repo(tmp_dir, "b.txt"))
 
-    @unittest.skip("Test is broken, fix me Wauplain!")
     def test_get_file_gated_repo(self):
         """Test download file from a gated repo fails with correct message when not authenticated."""
         with self.assertRaisesRegex(EnvironmentError, "You are trying to access a gated repo."):
-            cached_file(GATED_REPO, README_FILE, use_auth_token=False)
+            # All files except README.md are protected on a gated repo.
+            cached_file(GATED_REPO, "gated_file.txt", use_auth_token=False)
 
-    @unittest.skip("Test is broken, fix me Wauplain!")
     def test_has_file_gated_repo(self):
         """Test check file existence from a gated repo fails with correct message when not authenticated."""
         with self.assertRaisesRegex(EnvironmentError, "is a gated repository"):
-            has_file(GATED_REPO, README_FILE, use_auth_token=False)
+            # All files except README.md are protected on a gated repo.
+            has_file(GATED_REPO, "gated_file.txt", use_auth_token=False)