diff --git a/modin/pandas/dataframe.py b/modin/pandas/dataframe.py
index 9280e2233f6..0d8bcd0d314 100644
--- a/modin/pandas/dataframe.py
+++ b/modin/pandas/dataframe.py
@@ -2711,7 +2711,6 @@ def __setitem__(self, key, value) -> None:
                         to_concat.append(src_obj[to_take])
 
                     new_qc = concat(to_concat, axis=1)._query_compiler
-                    new_qc.index = self.index
                 else:
                     new_qc = self._query_compiler.write_items(
                         slice(None),
diff --git a/modin/tests/pandas/dataframe/test_indexing.py b/modin/tests/pandas/dataframe/test_indexing.py
index 35592d93e12..ebf041625ac 100644
--- a/modin/tests/pandas/dataframe/test_indexing.py
+++ b/modin/tests/pandas/dataframe/test_indexing.py
@@ -2177,8 +2177,10 @@ def test___setitem__(data):
     df_equals(modin_df, pandas_df)
 
     # Test df assignment to a columns selection
-    modin_df[modin_df.columns[[0, -1]]] = modin_df[modin_df.columns[[0, -1]]]
-    pandas_df[pandas_df.columns[[0, -1]]] = pandas_df[pandas_df.columns[[0, -1]]]
+    modin_columns = modin_df.columns[[0, -1]]
+    pandas_columns = pandas_df.columns[[0, -1]]
+    modin_df[modin_columns] = modin_df[modin_columns]
+    pandas_df[pandas_columns] = pandas_df[pandas_columns]
     df_equals(modin_df, pandas_df)
 
     # Test series assignment to column