diff --git a/pymysql/tests/test_basic.py b/pymysql/tests/test_basic.py
index c60b0cca..0fe13b59 100644
--- a/pymysql/tests/test_basic.py
+++ b/pymysql/tests/test_basic.py
@@ -323,9 +323,10 @@ def test_json(self):
         res = cur.fetchone()[0]
         self.assertEqual(json.loads(res), json.loads(json_str))
 
-        cur.execute("SELECT CAST(%s AS JSON) AS x", (json_str,))
-        res = cur.fetchone()[0]
-        self.assertEqual(json.loads(res), json.loads(json_str))
+        if self.get_mysql_vendor(conn) == "mysql":
+            cur.execute("SELECT CAST(%s AS JSON) AS x", (json_str,))
+            res = cur.fetchone()[0]
+            self.assertEqual(json.loads(res), json.loads(json_str))
 
 
 class TestBulkInserts(base.PyMySQLTestCase):