get_indexer_non_unique makes strange dtype choices

Author: batterseapower

pandas/tests/test_base.py

@@ -992,7 +992,7 @@ def test_bool_indexing(self, indexer_klass, indexer):
 
     def test_get_indexer_non_unique_dtype_mismatch(self):
         indexes, missing = pd.Index(["A", "B"]).get_indexer_non_unique(pd.Index([0]))
-        tm.assert_numpy_array_equal(np.array([-1], dtype=np.int64), indexes)
+        tm.assert_numpy_array_equal(np.array([-1], dtype=np.intp), indexes)
         tm.assert_numpy_array_equal(np.array([0], dtype=np.int64), missing)