diff --git a/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.reference b/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.reference
index 345e4c81330..035402c889d 100644
--- a/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.reference
+++ b/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.reference
@@ -10,3 +10,11 @@ ab
 ab
 ab
 ab
+-
+a	LowCardinality(String)	LowCardinality(UInt64)
+a
+ab
+c
+d
+cb
+db
diff --git a/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.sql b/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.sql
index 30d027839d7..4882e9c0c0e 100644
--- a/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.sql
+++ b/dbms/tests/queries/0_stateless/00688_low_cardinality_syntax.sql
@@ -65,5 +65,10 @@ drop table if exists test.lc_fix_str_1;
 drop table if exists test.lc_null_fix_str_0;
 drop table if exists test.lc_null_fix_str_1;
 
-
+select '-';
+SELECT toLowCardinality('a') AS s, toTypeName(s), toTypeName(length(s)) from system.one;
+select toLowCardinality('a') as val group by val;
+select (toLowCardinality('a') as val) || 'b' group by val;
+select toLowCardinality(z) as val from (select arrayJoin(['c', 'd']) as z) group by val;
+select (toLowCardinality(z) as val) || 'b'  from (select arrayJoin(['c', 'd']) as z) group by val;