diff --git a/dbms/tests/queries/0_stateless/00398_url_functions.reference b/dbms/tests/queries/0_stateless/00398_url_functions.reference
index 23390c199f0..acb605597d3 100644
--- a/dbms/tests/queries/0_stateless/00398_url_functions.reference
+++ b/dbms/tests/queries/0_stateless/00398_url_functions.reference
@@ -65,6 +65,8 @@ example.com
 example.com
 example.com
 example.com
+example.com
+example.com
 ====CUT WWW====
 http://example.com
 http://example.com:1234
diff --git a/dbms/tests/queries/0_stateless/00398_url_functions.sql b/dbms/tests/queries/0_stateless/00398_url_functions.sql
index cfe419f6dc3..d301cac5b15 100644
--- a/dbms/tests/queries/0_stateless/00398_url_functions.sql
+++ b/dbms/tests/queries/0_stateless/00398_url_functions.sql
@@ -73,6 +73,8 @@ SELECT cutToFirstSignificantSubdomain('http://www.example.com/a/b/c?a=b');
 SELECT cutToFirstSignificantSubdomain('http://www.example.com/a/b/c?a=b#d=f');
 SELECT cutToFirstSignificantSubdomain('http://paul@www.example.com/a/b/c?a=b#d=f');
 SELECT cutToFirstSignificantSubdomain('//paul@www.example.com/a/b/c?a=b#d=f');
+SELECT cutToFirstSignificantSubdomain('www.example.com');
+SELECT cutToFirstSignificantSubdomain('example.com');
 
 SELECT '====CUT WWW====';
 SELECT cutWWW('http://www.example.com');