Rebase

Author: proost

pandas/tests/indexes/test_base.py

@@ -2233,30 +2233,6 @@ def test_groupby(self):
 
         tm.assert_dict_equal(result, expected)
 
-    def test_groupby_nan_index_value(self):
-        df = pd.DataFrame([["x", np.nan, 1]], columns=["A", "B", "C"]).set_index(
-            ["A", "B"]
-        )
-        result = df.groupby(level=["A", "B"]).C.sum()
-        result = np.asarray(result)
-
-        s = Series([])
-        s.name = "C"
-        expected = s.astype("int64")
-        expected = np.asarray(expected)
-        tm.assert_numpy_array_equal(result, expected)
-
-        df = pd.DataFrame(
-            [["x", np.nan, 1, 2], [None, "y", 3, 4]], columns=["A", "B", "C", "D"]
-        ).set_index(["A", "B", "C"])
-        result = df.groupby(level=["A", "B"]).D.sum()
-        s = Series([])
-        s.name = "D"
-        expected = s.astype("int64")
-        result = np.asarray(result)
-        expected = np.asarray(expected)
-        tm.assert_numpy_array_equal(result, expected)
-
     @pytest.mark.parametrize(
         "mi,expected",
         [