diff --git a/addons/web/static/test/helpers/mock_server.js b/addons/web/static/test/helpers/mock_server.js
index 8e10b2b9f49..247562dbb96 100644
--- a/addons/web/static/test/helpers/mock_server.js
+++ b/addons/web/static/test/helpers/mock_server.js
@@ -90,13 +90,14 @@ var MockServer = Class.extend({
         var def;
         try {
             def = this._performRpc(route, args);
-        } catch (error) {
+        } catch (e) {
+            var error = {code: 200, data: {}, message: e.message};
             if (logLevel === 1) {
                 console.warn('Mock: ' + route, error.message);
             } else if (logLevel === 2) {
                 console.warn('%c[rpc] error response:', 'color: blue; font-weight: bold;', error.message);
             }
-            return $.Deferred().reject(error.message, $.Event());
+            return $.Deferred().reject(error, $.Event());
         }
         return def.then(function (result) {
             var resultString = JSON.stringify(result || false);
diff --git a/addons/web/static/test/views/kanban_tests.js b/addons/web/static/test/views/kanban_tests.js
index eaa33a0b396..ab67c103526 100644
--- a/addons/web/static/test/views/kanban_tests.js
+++ b/addons/web/static/test/views/kanban_tests.js
@@ -383,11 +383,7 @@ QUnit.module('Views', {
             groupBy: ['product_id'],
             mockRPC: function (route, args) {
                 if (args.method === 'name_create') {
-                    return $.Deferred().reject({
-                        code: 200,
-                        data: {},
-                        message: 'Odoo server error',
-                    });
+                    throw new Error("Odoo server error");
                 }
                 return this._super.apply(this, arguments);
             },