diff --git a/src/test/regress/expected/join_hash.out b/src/test/regress/expected/join_hash.out
index 9eee39bdd3..0890608acf 100644
--- a/src/test/regress/expected/join_hash.out
+++ b/src/test/regress/expected/join_hash.out
@@ -1,6 +1,9 @@
 --
 -- exercises for the hash join code
 --
+-- Enforce the use of hash joins in this test, which could get disabled
+-- at system-level.
+set enable_hashjoin = on;
 begin;
 set local min_parallel_table_scan_size = 0;
 set local parallel_setup_cost = 0;
diff --git a/src/test/regress/sql/join_hash.sql b/src/test/regress/sql/join_hash.sql
index ae352e9b0b..b38081d1d5 100644
--- a/src/test/regress/sql/join_hash.sql
+++ b/src/test/regress/sql/join_hash.sql
@@ -2,6 +2,10 @@
 -- exercises for the hash join code
 --
 
+-- Enforce the use of hash joins in this test, which could get disabled
+-- at system-level.
+set enable_hashjoin = on;
+
 begin;
 
 set local min_parallel_table_scan_size = 0;