diff --git a/src/test/regress/expected/without_overlaps.out b/src/test/regress/expected/without_overlaps.out
index f6fe8f09369..abc22d0113f 100644
--- a/src/test/regress/expected/without_overlaps.out
+++ b/src/test/regress/expected/without_overlaps.out
@@ -448,6 +448,10 @@ SELECT * FROM tp2 ORDER BY id, valid_at;
 (1 row)
 
 DROP TABLE temporal_partitioned;
+-- ALTER TABLE REPLICA IDENTITY
+-- (should fail)
+ALTER TABLE temporal_rng REPLICA IDENTITY USING INDEX temporal_rng_pk;
+ERROR:  cannot use non-unique index "temporal_rng_pk" as replica identity
 --
 -- test FK dependencies
 --
diff --git a/src/test/regress/sql/without_overlaps.sql b/src/test/regress/sql/without_overlaps.sql
index da2b7f19a85..d4ae03ae529 100644
--- a/src/test/regress/sql/without_overlaps.sql
+++ b/src/test/regress/sql/without_overlaps.sql
@@ -315,6 +315,10 @@ SELECT * FROM tp1 ORDER BY id, valid_at;
 SELECT * FROM tp2 ORDER BY id, valid_at;
 DROP TABLE temporal_partitioned;
 
+-- ALTER TABLE REPLICA IDENTITY
+-- (should fail)
+ALTER TABLE temporal_rng REPLICA IDENTITY USING INDEX temporal_rng_pk;
+
 --
 -- test FK dependencies
 --