Updated test

Author: ryankarlos

pandas/tests/scalar/timedelta/test_timedelta.py

@@ -352,11 +352,15 @@ def test_unit_parser(self, units, np_unit, wrapper):
             assert result == expected
 
     @pytest.mark.parametrize('units', ['Y', 'y', 'M'])
-    def test_unit_M_Y_deprecated(self, units):
-        with tm.assert_produces_warning(FutureWarning):
+    def test_unit_m_y_deprecated(self, units):
+        with pytest.warns(FutureWarning) as record1:
             to_timedelta(10, units)
-            TimedeltaIndex([1, 1, 1], units)
-            Timedelta(10, units)
+        assert len(record1) == 1
+        assert str(record1[0].message) == "M and Y units are deprecated."
+        with pytest.warns(FutureWarning) as record2:
+            to_timedelta(10, units)
+        assert len(record2) == 1
+        assert str(record2[0].message) == "M and Y units are deprecated."
 
     def test_numeric_conversions(self):
         assert ct(0) == np.timedelta64(0, 'ns')