diff --git a/src/test/regress/expected/join.out b/src/test/regress/expected/join.out
index 58d0d3f06f57e151087ada6c4c6aac53cb8c5287..b98288e5c218c4b948c0819b3b8b205e3ecc50c5 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, k;
+  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, k;
+  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, k;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
@@ -1810,7 +1810,7 @@ SELECT '' AS "xxx", *
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL JOIN J2_TBL USING (i)
-  ORDER BY i, k;
+  ORDER BY i, k, t;
  xxx | i | j |   t   | k  
 -----+---+---+-------+----
      | 0 |   | zero  |   
diff --git a/src/test/regress/sql/join.sql b/src/test/regress/sql/join.sql
index f9f851f677affc21a39f6c25500b85c0c59b9cfd..9bda6f1d00249377bb888ab993d79041f7b7926a 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, k;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT JOIN J2_TBL USING (i)
-  ORDER BY i, k;
+  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, k;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL FULL JOIN J2_TBL USING (i)
-  ORDER BY i, k;
+  ORDER BY i, k, t;
 
 SELECT '' AS "xxx", *
   FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (k = 1);