diff --git a/src/test/regress/expected/reloptions.out b/src/test/regress/expected/reloptions.out
index b6aef6f654..9f460a7e60 100644
--- a/src/test/regress/expected/reloptions.out
+++ b/src/test/regress/expected/reloptions.out
@@ -183,6 +183,17 @@ SELECT reloptions FROM pg_class WHERE oid = (
  {autovacuum_vacuum_cost_delay=23}
 (1 row)
 
+-- Can reset option that is not allowed, but for some reason is already set
+UPDATE pg_class
+	SET reloptions = '{fillfactor=13,autovacuum_enabled=false,illegal_option=4}'
+	WHERE oid = 'reloptions_test'::regclass;
+ALTER TABLE reloptions_test RESET (illegal_option);
+SELECT reloptions FROM pg_class WHERE oid = 'reloptions_test'::regclass;
+                reloptions                
+------------------------------------------
+ {fillfactor=13,autovacuum_enabled=false}
+(1 row)
+
 --
 -- CREATE INDEX, ALTER INDEX for btrees
 --
diff --git a/src/test/regress/sql/reloptions.sql b/src/test/regress/sql/reloptions.sql
index 4252b0202f..fadce3384d 100644
--- a/src/test/regress/sql/reloptions.sql
+++ b/src/test/regress/sql/reloptions.sql
@@ -105,6 +105,13 @@ SELECT reloptions FROM pg_class WHERE oid = 'reloptions_test'::regclass;
 SELECT reloptions FROM pg_class WHERE oid = (
 	SELECT reltoastrelid FROM pg_class WHERE oid = 'reloptions_test'::regclass);
 
+-- Can reset option that is not allowed, but for some reason is already set
+UPDATE pg_class
+	SET reloptions = '{fillfactor=13,autovacuum_enabled=false,illegal_option=4}'
+	WHERE oid = 'reloptions_test'::regclass;
+ALTER TABLE reloptions_test RESET (illegal_option);
+SELECT reloptions FROM pg_class WHERE oid = 'reloptions_test'::regclass;
+
 --
 -- CREATE INDEX, ALTER INDEX for btrees
 --