diff --git a/tests/endpoint_handlers/AuthRegistrationExecutor_TEST.cpp b/tests/endpoint_handlers/AuthRegistrationExecutor_TEST.cpp
index 6bd93d4..68cc44c 100644
--- a/tests/endpoint_handlers/AuthRegistrationExecutor_TEST.cpp
+++ b/tests/endpoint_handlers/AuthRegistrationExecutor_TEST.cpp
@@ -26,8 +26,6 @@ using RouteAuthRegistrationExecutor = AuthRegistrationExecutor<beast::http::stri
 using Request = boost::beast::http::request<beast::http::string_body,
                                             beast::http::basic_fields<std::allocator<char>>>;
 
-static const std::string kCreatedUserUUID = GenerateUUID();
-
 BOOST_AUTO_TEST_CASE(AuthRegistrationExecutor_Failed_Parse_Payload)
 {
   auto& argv = boost::unit_test::framework::master_test_suite().argv;
@@ -104,7 +102,7 @@ BOOST_AUTO_TEST_CASE(AuthRegistrationExecutor_Succesfull_User_Login)
 
   req_body.emplace_object();
 
-  req_body.as_object().emplace("login"s, "MyLogin12345678"s);
+  req_body.as_object().emplace("login"s, "MyLogin123456780");
   req_body.as_object().emplace("password"s, "Qwerty123456"s);
 
   req.body() = serialize(req_body);
@@ -116,3 +114,35 @@ BOOST_AUTO_TEST_CASE(AuthRegistrationExecutor_Succesfull_User_Login)
   mysql_session->close();
   delete mysql_session;
 }
+
+BOOST_AUTO_TEST_CASE(AuthRegistrationExecutor_Unsuccesfull_User_Login)
+{
+  auto& argv = boost::unit_test::framework::master_test_suite().argv;
+
+  const std::string mysql_credentials = argv[1];
+
+  mysqlx::Session* mysql_session = new mysqlx::Session(mysql_credentials);
+
+  uad::SetMySqlSession(mysql_session);
+
+  auto user_dao = make_shared<MySQLUserDAO>(GetMySqlSession());
+  auto executor = RouteAuthRegistrationExecutor(GetMySqlSession(), user_dao);
+
+  Request req;
+  value req_body;
+
+  req_body.emplace_object();
+
+  req_body.as_object().emplace("login"s, "MyLogin123456780");
+  req_body.as_object().emplace("password"s, "Qwerty123456"s);
+
+  req.body() = serialize(req_body);
+
+  BOOST_CHECK_EXCEPTION(executor(std::move(req)), session_exception, [](const session_exception& e) -> bool
+  {
+    return e.code == beast::http::status::conflict;
+  });
+
+  mysql_session->close();
+  delete mysql_session;
+}