diff --git a/src/test/regress/expected/grant_on_table_propagation.out b/src/test/regress/expected/grant_on_table_propagation.out
index 73e379cb4..7c0de05dd 100644
--- a/src/test/regress/expected/grant_on_table_propagation.out
+++ b/src/test/regress/expected/grant_on_table_propagation.out
@@ -1,3 +1,8 @@
+-- PostgreSQL 17 introduces MAINTAIN privilege, this change the default output
+-- of some test queries.
+--
+-- Alternative "grant_on_table_propagation_0.out" and this comment can be
+-- removed when support for PostgreSQL versions < 17 is dropped.
 --
 -- GRANT_ON_TABLE_PROPAGATION
 --
diff --git a/src/test/regress/expected/grant_on_table_propagation_0.out b/src/test/regress/expected/grant_on_table_propagation_0.out
index 653b9b43f..5ccc1ac9c 100644
--- a/src/test/regress/expected/grant_on_table_propagation_0.out
+++ b/src/test/regress/expected/grant_on_table_propagation_0.out
@@ -1,3 +1,8 @@
+-- PostgreSQL 17 introduces MAINTAIN privilege, this change the default output
+-- of some test queries.
+--
+-- Alternative "grant_on_table_propagation_0.out" and this comment can be
+-- removed when support for PostgreSQL versions < 17 is dropped.
 --
 -- GRANT_ON_TABLE_PROPAGATION
 --
diff --git a/src/test/regress/sql/grant_on_table_propagation.sql b/src/test/regress/sql/grant_on_table_propagation.sql
index 9db2c2339..2e2d5c3a7 100644
--- a/src/test/regress/sql/grant_on_table_propagation.sql
+++ b/src/test/regress/sql/grant_on_table_propagation.sql
@@ -1,3 +1,9 @@
+-- PostgreSQL 17 introduces MAINTAIN privilege, this change the default output
+-- of some test queries.
+--
+-- Alternative "grant_on_table_propagation_0.out" and this comment can be
+-- removed when support for PostgreSQL versions < 17 is dropped.
+
 --
 -- GRANT_ON_TABLE_PROPAGATION
 --