minor fixes

Author: jschendel

pandas/tests/indexes/test_interval.py

@@ -318,7 +318,7 @@ def test_delete(self, closed):
         IntervalIndex.from_tuples([(1, 2), ('a', 'z'), (3.14, 6.28)])])
     def test_insert(self, data):
         item = data[0]
-        idx_item = IntervalIndex([item], closed=data.closed)
+        idx_item = IntervalIndex([item])
 
         # start
         expected = idx_item.append(data)
@@ -348,7 +348,7 @@ def test_insert(self, data):
                 data.insert(1, bad_item)
 
         # GH 18295 (test missing)
-        na_idx = IntervalIndex([np.nan], closed=data.closed)
+        na_idx = IntervalIndex.from_tuples([np.nan], closed=data.closed)
         for na in (np.nan, pd.NaT, None):
             expected = data[:1].append(na_idx).append(data[1:])
             result = data.insert(1, na)