diff --git a/src/test/regress/expected/join.out b/src/test/regress/expected/join.out
index 471e149b8c7..7a1da6799e5 100644
--- a/src/test/regress/expected/join.out
+++ b/src/test/regress/expected/join.out
@@ -1718,7 +1718,7 @@ SELECT '' AS "xxx", *
 --
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT OUTER JOIN J2_TBL USING (i)
-  ORDER BY i;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
@@ -1738,7 +1738,7 @@ SELECT '' AS "xxx", *
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT JOIN J2_TBL USING (i)
-  ORDER BY i;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
@@ -1788,7 +1788,7 @@ SELECT '' AS "xxx", *
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL OUTER JOIN J2_TBL USING (i)
-  ORDER BY i, t;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
@@ -1802,15 +1802,15 @@ SELECT '' AS "xxx", *
      | 6 | 6 | six   |   
      | 7 | 7 | seven |   
      | 8 | 8 | eight |   
+     |   |   |       |  0
      |   |   | null  |   
      |   | 0 | zero  |   
      |   |   |       |   
-     |   |   |       |  0
 (15 rows)
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL JOIN J2_TBL USING (i)
-  ORDER BY i, t;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
@@ -1824,10 +1824,10 @@ SELECT '' AS "xxx", *
      | 6 | 6 | six   |   
      | 7 | 7 | seven |   
      | 8 | 8 | eight |   
+     |   |   |       |  0
      |   |   | null  |   
      |   | 0 | zero  |   
      |   |   |       |   
-     |   |   |       |  0
 (15 rows)
 
 SELECT '' AS "xxx", *
diff --git a/src/test/regress/sql/join.sql b/src/test/regress/sql/join.sql
index 9a286345b14..9bda6f1d002 100644
--- a/src/test/regress/sql/join.sql
+++ b/src/test/regress/sql/join.sql
@@ -167,11 +167,11 @@ SELECT '' AS "xxx", *
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT OUTER JOIN J2_TBL USING (i)
-  ORDER BY i;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT JOIN J2_TBL USING (i)
-  ORDER BY i;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL RIGHT OUTER JOIN J2_TBL USING (i);
@@ -181,11 +181,11 @@ SELECT '' AS "xxx", *
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL OUTER JOIN J2_TBL USING (i)
-  ORDER BY i, t;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL JOIN J2_TBL USING (i)
-  ORDER BY i, t;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (k = 1);