diff --git a/lib/middlewares/model.js b/lib/middlewares/model.js
index c8fe33bad..57090e7f9 100644
--- a/lib/middlewares/model.js
+++ b/lib/middlewares/model.js
@@ -12,7 +12,7 @@ const responses = require(path.resolve('./lib/helpers/responses'));
 /**
  * get Joi result
  */
-const getResultFromJoi = (body, schema, options) => Joi.validate(body, schema, options, (err, data) => {
+module.exports.getResultFromJoi = (body, schema, options) => Joi.validate(body, schema, options, (err, data) => {
   if (err) {
     const output = {
       status: 'failed',
@@ -41,7 +41,7 @@ module.exports.isValid = (schema) => (req, res, next) => {
       options.noDefaults = true;
     }
     // Validate req.body using the schema and validation options
-    const result = getResultFromJoi(req.body, schema, options);
+    const result = this.getResultFromJoi(req.body, schema, options);
     // if error
     if (result && result.error) {
       if (result.error.original && (result.error.original.password || result.error.original.firstname)) result.error.original = _.pick(result.error.original, config.whitelists.users.default);