diff --git a/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.reference b/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.reference
index 4ade9cd9c5d..eac8957dd47 100644
--- a/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.reference
+++ b/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.reference
@@ -6,3 +6,5 @@ optimize_skip_unused_shards
 optimize_skip_unused_shards lack of WHERE
 0
 1
+0
+1
diff --git a/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.sql b/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.sql
index 5b45bea9046..67ba1cda870 100644
--- a/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.sql
+++ b/tests/queries/0_stateless/01213_optimize_skip_unused_shards_DISTINCT.sql
@@ -12,6 +12,7 @@ SELECT DISTINCT id FROM dist_01213 WHERE id = 1 SETTINGS distributed_group_by_no
 SELECT 'optimize_skip_unused_shards';
 SELECT DISTINCT id FROM dist_01213 WHERE id = 1 SETTINGS optimize_skip_unused_shards=1;
 -- check that querying all shards is ok
+-- (there will be duplicates, since the INSERT was done via local table)
 SELECT 'optimize_skip_unused_shards lack of WHERE';
 SELECT DISTINCT id FROM dist_01213 SETTINGS optimize_skip_unused_shards=1;