diff --git a/src/azure-cli-core/azure/cli/core/auth/tests/test_adal_authentication.py b/src/azure-cli-core/azure/cli/core/auth/tests/test_adal_authentication.py
deleted file mode 100644
index f3a48cb7c90..00000000000
--- a/src/azure-cli-core/azure/cli/core/auth/tests/test_adal_authentication.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# --------------------------------------------------------------------------------------------
-# Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See License.txt in the project root for license information.
-# --------------------------------------------------------------------------------------------
-
-import unittest
-
-from azure.cli.core.auth.adal_authentication import _normalize_expires_on
-
-
-class TestUtil(unittest.TestCase):
-    def test_normalize_expires_on(self):
-        assert _normalize_expires_on("11/05/2021 15:18:31 +00:00") == 1636125511
-        assert _normalize_expires_on('1636125511') == 1636125511
-
-
-if __name__ == '__main__':
-    unittest.main()