diff --git a/pandas/tests/frame/indexing/test_indexing.py b/pandas/tests/frame/indexing/test_indexing.py
index 81a5e3d9947be..debfc0e80250a 100644
--- a/pandas/tests/frame/indexing/test_indexing.py
+++ b/pandas/tests/frame/indexing/test_indexing.py
@@ -1449,6 +1449,8 @@ def test_loc_bool_multiindex(self, dtype, indexer):
             names=["a", "b"],
         )
         df = DataFrame({"c": [1, 2, 3, 4]}, index=midx)
+        df.sort_index()
+
         result = df.loc[indexer]
         expected = DataFrame(
             {"c": [1, 2]}, index=Index([True, False], name="b", dtype=dtype)