diff --git a/mysql-test/r/func_json.result b/mysql-test/r/func_json.result
index 041fed3aec4..ac604b9e09c 100644
--- a/mysql-test/r/func_json.result
+++ b/mysql-test/r/func_json.result
@@ -237,6 +237,9 @@ NULL
 select json_merge('a','b');
 json_merge('a','b')
 NULL
+select json_merge('{"a":"b"}','{"c":"d"}');
+json_merge('{"a":"b"}','{"c":"d"}')
+{"a":"b", "c":"d"}
 select json_type('{"k1":123, "k2":345}');
 json_type('{"k1":123, "k2":345}')
 OBJECT
diff --git a/mysql-test/t/func_json.test b/mysql-test/t/func_json.test
index 7c892eebc4e..2b4385a43b9 100644
--- a/mysql-test/t/func_json.test
+++ b/mysql-test/t/func_json.test
@@ -99,6 +99,7 @@ select json_merge('{"1": 2}', '{"true": false}');
 select json_merge('{"1": 2}', '{"true": false}', '{"3": 4}');
 select json_merge(NULL,json_object('foo', 1));
 select json_merge('a','b');
+select json_merge('{"a":"b"}','{"c":"d"}');
 
 select json_type('{"k1":123, "k2":345}');
 select json_type('[123, "k2", 345]');