diff --git a/test/test_SCardGetErrorMessage.py b/test/test_SCardGetErrorMessage.py
old mode 100644
new mode 100755
index c6fe755..c1217f5
--- a/test/test_SCardGetErrorMessage.py
+++ b/test/test_SCardGetErrorMessage.py
@@ -29,12 +29,10 @@ class TestError(unittest.TestCase):
         self.assertEqual(res, expected)
 
         res = SCardGetErrorMessage(1)
+        expected = "Unknown error: 0x00000001"
         # macOS bug not yet fixed
-        if get_platform().startswith('macosx-') and get_platform() < 'macosx-10.13':
-            expected = "Unkown error: 0x00000001"
-        else:
-            expected = "Unknown error: 0x00000001"
-        self.assertEqual(res, expected)
+        macos_bug_expected = "Unkown error: 0x00000001"
+        self.assertIn(res, [expected, macos_bug_expected])
 
 
 if __name__ == '__main__':