diff --git a/python/tests/test_Result.py b/python/tests/test_Result.py
index d09a95815..f5ffd2821 100644
--- a/python/tests/test_Result.py
+++ b/python/tests/test_Result.py
@@ -107,7 +107,8 @@ class TestResult:
         in_file   = default.place('|F_e|')
         assert np.allclose(in_memory,in_file)
 
-    @pytest.mark.parametrize('mode',['direct','function'])
+    @pytest.mark.parametrize('mode',
+        ['direct',pytest.param('function',marks=pytest.mark.xfail(sys.platform=="darwin",reason='n/a'))])
     def test_add_calculation(self,default,tmp_path,mode):
 
         if mode == 'direct':