diff --git a/addons/web/static/src/js/view_list_editable.js b/addons/web/static/src/js/view_list_editable.js
index 17e1a04cf7a..1c1c4cc0dfd 100644
--- a/addons/web/static/src/js/view_list_editable.js
+++ b/addons/web/static/src/js/view_list_editable.js
@@ -232,7 +232,9 @@ openerp.web.list_editable = function (instance) {
             event = event || {};
             this.trigger(event_name + ':before', event);
             if (event.cancel) {
-                return $.Deferred().reject();
+                return $.Deferred().reject({
+                    message: _.str.sprintf("Event %s:before cancelled",
+                                           event_name)});
             }
             return $.when(action.apply(this.editor, args || [])).then(function () {
                 self.trigger.apply(self, [event_name + ':after']
@@ -424,7 +426,8 @@ openerp.web.list_editable = function (instance) {
             var record = this.record;
             this.record = null;
             if (!this.form.can_be_discarded()) {
-                return $.Deferred().reject().promise();
+                return $.Deferred().reject({
+                    message: "The form's data can not be discarded"}).promise();
             }
             this.form.do_hide();
             return $.when(record);
diff --git a/addons/web/static/test/list-editable.js b/addons/web/static/test/list-editable.js
index 4a8fbae1094..62d9d82ae83 100644
--- a/addons/web/static/test/list-editable.js
+++ b/addons/web/static/test/list-editable.js
@@ -37,4 +37,66 @@ $(document).ready(function () {
                    "should use default form type");
             });
     });
+    asyncTest('toggle-edition-new', function () {
+        instance.connection.responses['/web/dataset/call_kw:create'] = function () {
+            return { result: 42 };
+    };
+        instance.connection.responses['/web/dataset/call_kw:read'] = function () {
+            return { result: [{
+                id: 42,
+                a: false,
+                b: false,
+                c: false
+            }]};
+        };
+        var e = new instance.web.list.Editor({
+            do_warn: function (e) {
+                warning = e;
+            },
+            dataset: new instance.web.DataSetSearch(),
+            isPrependOnCreate: function () { return false; },
+            editionView: function () {
+                return {
+                    arch: {
+                        tag: 'form',
+                        attrs: {
+                            version: '7.0',
+                            'class': 'oe_form_container'
+                        },
+                        children: [
+                            {tag: 'field', attrs: {name: 'a'}},
+                            {tag: 'field', attrs: {name: 'b'}},
+                            {tag: 'field', attrs: {name: 'c'}}
+                        ]
+                    },
+                    fields: {
+                        a: {type: 'char'},
+                        b: {type: 'char'},
+                        c: {type: 'char'}
+                    }
+                };
+            }
+        });
+        var counter = 0;
+        var warning = null;
+        e.appendTo($fix)
+            .pipe(function () {
+                return e.edit(null, function () {
+                    ++counter;
+                });
+            })
+            .pipe(function (form) {
+                ok(e.isEditing(), "editor is now editing");
+                equal(counter, 3, "all fields have been configured");
+                strictEqual(form, e.form);
+                return e.save();
+            })
+            .always(start)
+            .fail(function (error) { ok(false, error && error.message); })
+            .done(function (record) {
+                ok(!warning, "should have received no warning");
+                ok(!e.isEditing(), "should have stopped editing");
+                equal(record.id, 42, "should have newly created id");
+            })
+    });
 });
diff --git a/addons/web/static/test/testing.js b/addons/web/static/test/testing.js
index 5b6e27700ab..e9525fc82a0 100644
--- a/addons/web/static/test/testing.js
+++ b/addons/web/static/test/testing.js
@@ -55,11 +55,16 @@ openerp.testing = (function () {
             var connection = instance.connection;
             connection.responses = responses || {};
             connection.rpc_function = function (url, payload) {
-                if (!(url.url in this.responses)) {
+                var fn = this.responses[url.url + ':' + payload.params.method]
+                      || this.responses[url.url];
+
+                if (!fn) {
                     return $.Deferred().reject({}, 'failed',
-                        _.str.sprintf("Url %s not found in mock responses", url.url)).promise();
+                        _.str.sprintf("Url %s not found in mock responses, with arguments %s",
+                                      url.url, JSON.stringify(payload.params))
+                    ).promise();
                 }
-                return $.when(this.responses[url.url](payload));
+                return $.when(fn(payload));
             };
         },
         /**