minor chenges tests

test/test__getsetitem__.py

@@ -52,7 +52,7 @@ def test__getitem_single_loc_fail(idxer):
         a = d1.loc[:, idxer]
 
 
-@pytest.mark.parametrize('idxer', [-5, 99, 'a', '2', ])
+@pytest.mark.parametrize('idxer', [-5, 99, 'a', '2', None, ])
 def test__getitem_single_iloc_fail(idxer):
     with pytest.raises(KeyError):
         a = d1.iloc[:, idxer]

test/test_dios.py

@@ -138,7 +138,7 @@ def test__op2__(left, right, op):
                 assert res == exp
 
     except ZeroDivisionError:
-        pytest.mark.skip('ZeroDivisionError')
+        pytest.skip('ZeroDivisionError')
 
 
 @pytest.mark.parametrize('data', _diosmatr(ALL))