diff --git a/addons/mail/static/src/js/attachment_box.js b/addons/mail/static/src/js/attachment_box.js
index b42e8aeca95..f58c64f26e7 100644
--- a/addons/mail/static/src/js/attachment_box.js
+++ b/addons/mail/static/src/js/attachment_box.js
@@ -13,46 +13,43 @@ var AttachmentBox = Widget.extend({
     events: {
         "click .o_attachment_download": "_onAttachmentDownload",
         "click .o_attachment_view": "_onAttachmentView",
+        "click .o_attachment_delete_cross": "_onDeleteAttachment",
+        "click .o_upload_attachments_button": "_onUploadAttachments",
+        "change .o_chatter_attachment_form .o_form_binary_form": "_onAddAttachment",
     },
     /**
      * @override
      * @param {string} record.model
      * @param {Number} record.res_id
+     * @param {Object[]} attachments
      */
-    init: function (parent, record) {
+    init: function (parent, record, attachments) {
         this._super.apply(this, arguments);
+        this.fileuploadId = _.uniqueId('oe_fileupload');
+        $(window).on(this.fileuploadId, this._onUploaded.bind(this));
         this.currentResID = record.res_id;
         this.currentResModel = record.model;
-        this.attachmentIDs = {};
+        this.attachmentIDs = attachments;
         this.imageList = {};
         this.otherList = {};
+
+        _.each(attachments, function (attachment) {
+            // required for compatibility with the chatter templates.
+            attachment.url = '/web/content/' + attachment.id + '?download=true';
+            attachment.filename = attachment.datas_fname || 'unnamed';
+        });
+        var sortedAttachments = _.partition(attachments, function (att) {
+            return att.mimetype && att.mimetype.split('/')[0] === 'image';
+        });
+        this.imageList = sortedAttachments[0];
+        this.otherList = sortedAttachments[1];
     },
     /**
      * @override
      */
-    willStart: function () {
-        var self = this;
-        var domain = [
-            ['res_id', '=', this.currentResID],
-            ['res_model', '=', this.currentResModel],
-        ];
-        return $.when(this._super.apply(this, arguments), this._rpc({
-            model: 'ir.attachment',
-            method: 'search_read',
-            domain: domain,
-        }).then(function (result) {
-            self.attachmentIDs = result;
-            _.each(result, function (attachment) {
-                attachment.url = '/web/content/' + attachment.id + '?download=true';
-                // required for compatibility with the chatter templates.
-                attachment.filename = attachment.datas_fname || 'unnamed';
-            });
-            var sortedAttachments = _.partition(result, function (att) {
-                return att.mimetype && att.mimetype.split('/')[0] === 'image';
-            });
-            self.imageList = sortedAttachments[0];
-            self.otherList = sortedAttachments[1];
-        }));
+    destroy: function () {
+        $(window).off(this.fileuploadId);
+        this._super.apply(this, arguments);
     },
 
     //--------------------------------------------------------------------------
@@ -60,8 +57,8 @@ var AttachmentBox = Widget.extend({
     //--------------------------------------------------------------------------
 
     /**
-    * @param {Object} record
-    */
+     * @param {Object} record
+     */
     update: function (record) {
         this.currentResID = record.res_id;
         this.currentResModel = record.model;
@@ -71,6 +68,19 @@ var AttachmentBox = Widget.extend({
     // Handlers
     //--------------------------------------------------------------------------
 
+    /**
+     * Method triggered when user click on 'add attachment' and select a file
+     *
+     * @private
+     * @param {MouseEvent} ev
+     */
+    _onAddAttachment: function (ev) {
+        var $input = $(ev.currentTarget).find('input.o_input_file');
+        if ($input.val() !== '') {
+            var $binaryForm = this.$('form.o_form_binary_form');
+            $binaryForm.submit();
+        }
+    },
     /**
      * @private
      * @param {MouseEvent} ev
@@ -92,6 +102,33 @@ var AttachmentBox = Widget.extend({
             attachmentViewer.appendTo($('body'));
         }
     },
+    /**
+     * Opens File Explorer dialog if all fields are valid and record is saved
+     *
+     * @private
+     * @param {MouseEvent} ev
+     */
+    _onUploadAttachments: function (ev) {
+        this.$('input.o_input_file').click();
+    },
+    /**
+     * @private
+     * @param {MouseEvent} ev
+     */
+    _onDeleteAttachment: function (ev) {
+        ev.stopPropagation();
+        var $target = $(ev.currentTarget);
+        this.trigger_up('delete_attachment', {
+            attachmentId: $target.data('id'),
+            attachmentName: $target.data('name')
+        });
+    },
+    /**
+     * @private
+     */
+    _onUploaded: function() {
+        this.trigger_up('reload_attachment_box');
+    },
 });
 
 return AttachmentBox;
diff --git a/addons/mail/static/src/js/chatter.js b/addons/mail/static/src/js/chatter.js
index 000353d1219..da23521f65f 100644
--- a/addons/mail/static/src/js/chatter.js
+++ b/addons/mail/static/src/js/chatter.js
@@ -4,6 +4,7 @@ odoo.define('mail.Chatter', function (require) {
 var Activity = require('mail.Activity');
 var AttachmentBox = require('mail.AttachmentBox');
 var ChatterComposer = require('mail.composer.Chatter');
+var Dialog = require('web.Dialog');
 var Followers = require('mail.Followers');
 var ThreadField = require('mail.ThreadField');
 var mailUtils = require('mail.utils');
@@ -13,25 +14,28 @@ var config = require('web.config');
 var core = require('web.core');
 var Widget = require('web.Widget');
 
+var _t = core._t;
 var QWeb = core.qweb;
 
 // The purpose of this widget is to display the chatter area below the form view
 //
-// It instanciates the optional mail_thread, mail_activity and mail_followers widgets.
+// It instantiates the optional mail_thread, mail_activity and mail_followers widgets.
 // It Ensures that those widgets are appended at the right place, and allows them to communicate
 // with each other.
-// It synchronizes the rendering of those widgets (as they may be asynchronous), to limitate
+// It synchronizes the rendering of those widgets (as they may be asynchronous), to mitigate
 // the flickering when switching between records
 var Chatter = Widget.extend({
     template: 'mail.Chatter',
     custom_events: {
+        delete_attachment: '_onDeleteAttachment',
         discard_record_changes: '_onDiscardRecordChanges',
+        reload_attachment_box: '_onReloadAttachmentBox',
         reload_mail_fields: '_onReloadMailFields',
     },
     events: {
         'click .o_chatter_button_new_message': '_onOpenComposerMessage',
         'click .o_chatter_button_log_note': '_onOpenComposerNote',
-        'click .o_chatter_button_attachment': '_onOpenAttachments',
+        'click .o_chatter_button_attachment': '_onClickAttachmentButton',
         'click .o_chatter_button_schedule_activity': '_onScheduleActivity',
     },
     supportedFieldTypes: ['one2many'],
@@ -52,15 +56,19 @@ var Chatter = Widget.extend({
         this._super.apply(this, arguments);
         this._setState(record);
 
-        this._dp = new concurrency.DropPrevious();
+        this.attachments = {};
+        this.fields = {};
 
+        this._areAttachmentsLoaded = false;
+        this._disableAttachmentBox = !!options.disable_attachment_box;
+        this._dp = new concurrency.DropPrevious();
+        this._isAttachmentBoxOpen = false;
         // mention: get the prefetched partners and use them as mention suggestions
         // if there is a follower widget, the followers will be added to the
         // suggestions as well once fetched
         this._mentionPartnerSuggestions = this.call('mail_service', 'getMentionPartnerSuggestions');
         this._mentionSuggestions = this._mentionPartnerSuggestions;
 
-        this.fields = {};
         if (mailFields.mail_activity) {
             this.fields.activity = new Activity(this, mailFields.mail_activity, record, options);
         }
@@ -74,16 +82,17 @@ var Chatter = Widget.extend({
             this.hasLogButton = options.display_log_button || nodeOptions.display_log_button;
             this.postRefresh = nodeOptions.post_refresh || 'never';
         }
-        this.attachmentBoxOpened = false;
     },
     /**
      * @override
      */
     start: function () {
         this._$topbar = this.$('.o_chatter_topbar');
-        this.$('.o_topbar_right_area').append(QWeb.render('mail.chatter.Attachment.Button', {
-            count: this.record.data.message_attachment_count || 0,
-        }));
+        if(!this._disableAttachmentBox) {
+            this.$('.o_topbar_right_area').append(QWeb.render('mail.chatter.Attachment.Button', {
+                count: this.record.data.message_attachment_count || 0,
+            }));
+        }
         // render and append the buttons
         this._$topbar.prepend(QWeb.render('mail.chatter.Buttons', {
             newMessageButton: !!this.fields.thread,
@@ -115,6 +124,8 @@ var Chatter = Widget.extend({
         if (this.record.res_id !== record.res_id) {
             this._closeComposer(true);
             this._closeAttachments();
+            this._areAttachmentsLoaded = false;
+            this.attachments = {};
         }
 
         // update the state
@@ -155,13 +166,12 @@ var Chatter = Widget.extend({
 
     /**
      * @private
-     * @param {boolean} force
      */
     _closeAttachments: function () {
         if (this.fields.attachments) {
             this.$('.o_chatter_button_attachment').removeClass('o_active_attach');
             this.fields.attachments.destroy();
-            this.attachmentBoxOpened = false;
+            this._isAttachmentBoxOpen = false;
         }
     },
     /**
@@ -231,22 +241,46 @@ var Chatter = Widget.extend({
     _enableComposer: function () {
         this.$(".o_composer_button_send").prop('disabled', false);
     },
+    /*
+    * @private
+    * @return {Deferred}
+    */
+    _fetchAttachments: function () {
+        var self = this;
+        var domain = [
+            ['res_id', '=', this.record.res_id],
+            ['res_model', '=', this.record.model],
+        ];
+        return this._rpc({
+            model: 'ir.attachment',
+            method: 'search_read',
+            domain: domain,
+            fields: ['id', 'name', 'datas_fname', 'mimetype'],
+        }).then(function (result) {
+            self._areAttachmentsLoaded = true;
+            self.attachments = result;
+        });
+
+    },
     /**
      * @private
      */
-    _openAttachments: function () {
-        var self = this;
-        this.fields.attachments = new AttachmentBox(this, this.record);
-
+    _openAttachmentBox: function () {
+        if (this.fields.attachments) {
+            this._closeAttachments();
+        }
+        this.fields.attachments = new AttachmentBox(this, this.record, this.attachments);
         var $anchor = this.$('.o_chatter_topbar');
         if (this._composer) {
-            $anchor = this.$('.o_thread_composer');
+            var $anchor = this.$('.o_thread_composer');
+        } else {
+            var $anchor = this.$('.o_chatter_topbar');
         }
-        this.fields.attachments.insertAfter($anchor).then(function () {
-            self.$el.addClass('o_chatter_composer_active');
-            self.$('.o_chatter_button_attachment').addClass('o_active_attach');
-        });
-        this.attachmentBoxOpened = true;
+        this.fields.attachments.insertAfter($anchor);
+        this.$el.addClass('o_chatter_composer_active');
+        this.$('.o_chatter_button_attachment').addClass('o_active_attach');
+
+        this._isAttachmentBoxOpen = true;
     },
     /**
      * @private
@@ -286,6 +320,7 @@ var Chatter = Widget.extend({
                         if (self._reloadAfterPost(messageData)) {
                             self.trigger_up('reload');
                         } else if (messageData.attachment_ids.length) {
+                            self._reloadAttachmentBox();
                             self.trigger_up('reload', {fieldNames: ['message_attachment_count']});
                         }
                     }).fail(function () {
@@ -320,6 +355,16 @@ var Chatter = Widget.extend({
                    messageData.partner_ids.length
                 );
     },
+    /**
+     * @private
+     */
+    _reloadAttachmentBox: function () {
+        this._areAttachmentsLoaded = false;
+        if (this._isAttachmentBoxOpen) {
+            this._fetchAttachments().then(this._openAttachmentBox.bind(this));
+        }
+        this.trigger_up('reload', { fieldNames: ['message_attachment_count'] });
+    },
     /**
      * @private
      * @param {Deferred} def
@@ -344,7 +389,11 @@ var Chatter = Widget.extend({
                 self.fields.activity.$el.appendTo(self.$el);
             }
             if (self.fields.followers) {
-                self.fields.followers.$el.insertBefore(self.$('.o_chatter_button_attachment'));
+                if (self._disableAttachmentBox) {
+                    self.fields.followers.$el.appendTo(self.$('.o_topbar_right_area'));
+                } else {
+                    self.fields.followers.$el.insertBefore(self.$('.o_chatter_button_attachment'));
+                }
             }
             if (self.fields.thread) {
                 self.fields.thread.$el.appendTo(self.$el);
@@ -383,8 +432,7 @@ var Chatter = Widget.extend({
      */
      _updateAttachmentCounter: function () {
         var count = this.record.data.message_attachment_count || 0;
-        this.$('.o_chatter_attachment_button_count').html(' ('+ count +')');
-        this.$('.o_chatter_button_attachment').toggleClass('o_hidden', !count);
+        this.$('.o_chatter_attachment_button_count').html(count);
      },
     /**
      * @private
@@ -427,12 +475,45 @@ var Chatter = Widget.extend({
 
     /**
      * @private
+     * @param {OdooEvent} ev
+     * @param {integer} ev.data.attachmentId
+     * @param {String} ev.data.attachmentName
      */
-    _onOpenAttachments: function () {
-        if (this.attachmentBoxOpened) {
+    _onDeleteAttachment: function (ev) {
+        ev.stopPropagation();
+        var self = this;
+        var options = {
+            confirm_callback: function () {
+                self._rpc({
+                    model: 'ir.attachment',
+                    method: 'unlink',
+                    args: [parseInt(ev.data.attachmentId, 10)],
+                })
+                .then(function () {
+                    self._reloadAttachmentBox();
+                    self.fields.thread.removeAttachments([ev.data.attachmentId]);
+                    self.trigger_up('reload');
+                });
+            }
+        };
+        var promptText = _.str.sprintf(_t("Do you really want to delete %s?"), _.escape(ev.data.attachmentName));
+        Dialog.confirm(this, promptText, options);
+    },
+    /**
+     * @private
+     */
+    _onClickAttachmentButton: function () {
+        if(this._disableAttachmentBox) {
+            return;
+        }
+        if (this._isAttachmentBoxOpen) {
             this._closeAttachments();
         } else {
-            this._openAttachments();
+            var def;
+            if (!this._areAttachmentsLoaded) {
+                def = this._fetchAttachments();
+            }
+            $.when(def).then(this._openAttachmentBox.bind(this));
         }
     },
     /**
@@ -483,6 +564,12 @@ var Chatter = Widget.extend({
     _onOpenComposerNote: function () {
         this._openComposer({ isLog: true });
     },
+    /**
+     * @private
+     */
+    _onReloadAttachmentBox: function () {
+        this._reloadAttachmentBox();
+    },
     /**
      * @private
      * @param {OdooEvent} event
diff --git a/addons/mail/static/src/js/models/messages/abstract_message.js b/addons/mail/static/src/js/models/messages/abstract_message.js
index f5cf55f0ef1..c1ae22b9708 100644
--- a/addons/mail/static/src/js/models/messages/abstract_message.js
+++ b/addons/mail/static/src/js/models/messages/abstract_message.js
@@ -335,6 +335,14 @@ var AbstractMessage =  Class.extend({
     needsModeration: function () {
         return false;
     },
+    /**
+     * @params {integer[]} attachmentIDs
+     */
+    removeAttachments: function (attachmentIDs) {
+        this._attachmentIDs = _.reject(this._attachmentIDs, function (attachment) {
+            return _.contains(attachmentIDs, attachment.id);
+        });
+    },
     /**
      * State whether this message should redirect to the author
      * when clicking on the author of this message.
diff --git a/addons/mail/static/src/js/models/threads/document_thread.js b/addons/mail/static/src/js/models/threads/document_thread.js
index d902d69765c..6c15b39d25e 100644
--- a/addons/mail/static/src/js/models/threads/document_thread.js
+++ b/addons/mail/static/src/js/models/threads/document_thread.js
@@ -156,6 +156,14 @@ var DocumentThread = Thread.extend({
     isLinkedToDocument: function () {
         return true;
     },
+    /**
+     * @param {integer[]} attachmentIDs
+     */
+    removeAttachmentsFromMessages: function (attachmentIDs) {
+        _.each(this.getMessages(), function (message) {
+            message.removeAttachments(attachmentIDs);
+        });
+    },
     /**
      * Set list of message IDs of this document thread
      *
diff --git a/addons/mail/static/src/js/thread_field.js b/addons/mail/static/src/js/thread_field.js
index 5c85a2adb37..a3807802ad7 100644
--- a/addons/mail/static/src/js/thread_field.js
+++ b/addons/mail/static/src/js/thread_field.js
@@ -70,6 +70,12 @@ var ThreadField = AbstractField.extend({
     // Public
     //--------------------------------------------------------------------------
 
+    /**
+     * @param {integer[]} attachmentIDs
+     */
+    removeAttachments: function (attachmentIDs) {
+        this._documentThread.removeAttachmentsFromMessages(attachmentIDs);
+    },
     /**
      * @override
      * @return {boolean}
diff --git a/addons/mail/static/src/js/thread_widget.js b/addons/mail/static/src/js/thread_widget.js
index d812d403007..2e2b7e222c6 100644
--- a/addons/mail/static/src/js/thread_widget.js
+++ b/addons/mail/static/src/js/thread_widget.js
@@ -34,6 +34,7 @@ var ThreadWidget = Widget.extend({
         'click .o_thread_show_more': '_onClickShowMore',
         'click .o_attachment_download': '_onAttachmentDownload',
         'click .o_attachment_view': '_onAttachmentView',
+        'click .o_attachment_delete_cross': '_onDeleteAttachment',
         'click .o_thread_message_needaction': '_onClickMessageNeedaction',
         'click .o_thread_message_star': '_onClickMessageStar',
         'click .o_thread_message_reply': '_onClickMessageReply',
@@ -410,6 +411,18 @@ var ThreadWidget = Widget.extend({
             });
         });
     },
+    /**
+    * @private
+    * @param {MouseEvent} ev
+    */
+    _onDeleteAttachment: function (ev) {
+        ev.stopPropagation();
+        var $target = $(ev.currentTarget);
+        this.trigger_up('delete_attachment', {
+            attachmentId: $target.data('id'),
+            attachmentName: $target.data('name')
+        });
+     },
     /**
      * @private
      * @param {Object} options
diff --git a/addons/mail/static/src/scss/attachment_box.scss b/addons/mail/static/src/scss/attachment_box.scss
index ab412bf52fe..a9aa6aec260 100644
--- a/addons/mail/static/src/scss/attachment_box.scss
+++ b/addons/mail/static/src/scss/attachment_box.scss
@@ -1,25 +1,36 @@
 .oe_chatter {
+
     .btn.o_active_attach {
-        color: #875A7B;
         height: 300px;
     }
-    .o_chatter_attachment {
-        padding: 3px;
+    .o_mail_chatter_attachments {
+        min-height: 50px;
 
-        .o_border_dashed {
-            position: relative;
-            margin-top: 15px;
-            margin-bottom: 30px;
-            border-bottom: 1px dashed gray('300');
-            text-align: center;
+        .o_chatter_attachment {
+            padding: 3px;
 
-            .o_attach_title {
+            input.o_input_file {
+                position: absolute;
+                top: 1px;
+                opacity: 0;
+                pointer-events: none;
+            }
+
+            .o_border_dashed {
+                position: relative;
+                margin-top: 5px;
+                margin-bottom: 5px;
+                border-bottom: 1px dashed gray('300');
+                text-align: center;
+
+                .o_attach_title {
                     position: relative;
                     top: 10px;
                     margin: 0 auto;
                     padding: 0 10px;
                     font-weight: bold;
                     background: white;
+                }
             }
         }
     }
diff --git a/addons/mail/static/src/scss/chatter.scss b/addons/mail/static/src/scss/chatter.scss
index 261552c2b23..599802382a1 100644
--- a/addons/mail/static/src/scss/chatter.scss
+++ b/addons/mail/static/src/scss/chatter.scss
@@ -4,6 +4,11 @@
     width: 100%;
     padding-top: 0!important;
 
+    .o_attachment_delete_cross {
+        @include o-position-absolute($right: 6px, $top:7px);
+        cursor: pointer;
+    }
+
     .o_spinner {
         text-align: center;
         font-size: large;
@@ -21,9 +26,16 @@
             position: relative;
             float: right;
             flex: 1 1 auto;
+
             .o_chatter_button_attachment {
-                height: 2.3em;
+                height: $o-statusbar-height - 2px;
                 float: right;
+                padding: 0px;
+                margin-right: 25px;
+
+                .fa-paperclip, .o_chatter_attachment_button_count {
+                    font-weight: bold;
+                }
             }
             .o_followers {
                 height: $o-statusbar-height + 1;
diff --git a/addons/mail/static/src/scss/composer.scss b/addons/mail/static/src/scss/composer.scss
index aa5131b0de5..096c527aa16 100644
--- a/addons/mail/static/src/scss/composer.scss
+++ b/addons/mail/static/src/scss/composer.scss
@@ -434,6 +434,10 @@ $o-mail-attachment-margin: 5px;
                 font-size: $font-size-sm;
             }
 
+            .o_attachment_delete_cross {
+                color: white;
+            }
+
             .o_attachment_download {
                 @include o-position-absolute($right: 7px, $bottom:7px);
             }
diff --git a/addons/mail/static/src/xml/chatter.xml b/addons/mail/static/src/xml/chatter.xml
index 7461f4b9055..7f8629f1bae 100644
--- a/addons/mail/static/src/xml/chatter.xml
+++ b/addons/mail/static/src/xml/chatter.xml
@@ -20,6 +20,16 @@
                     <t t-call="mail.Attachment"/>
                 </t>
             </div>
+            <div class="o_chatter_attachment_form">
+                <t t-call="HiddenInputFile">
+                    <t t-set="fileupload_id" t-value="widget.fileuploadId"/>
+                    <t t-set="fileupload_action" t-translation="off">/web/binary/upload_attachment</t>
+                    <t t-set="multi_upload" t-value="true"/>
+                    <input type="hidden" name="model" t-att-value="widget.currentResModel"/>
+                    <input type="hidden" name="id" t-att-value="widget.currentResID"/>
+                    <center><span class="btn btn-link o_upload_attachments_button"><span class="fa fa-plus-square"/> Add Attachments</span></center>
+                </t>
+            </div>
         </div>
     </div>
 
@@ -96,11 +106,11 @@
     </t>
 
     <t t-name="mail.chatter.Attachment.Button">
-        <button t-attf-class="btn btn-sm btn-link o_chatter_button_attachment #{!count and 'o_hidden' or ''}" title="View all the attachments of the current record">
+        <button class="btn btn-link o_chatter_button_attachment" title="View all the attachments of the current record">
             <span>
                 <i class="fa fa-paperclip"/>
                 <span class="o_chatter_attachment_button_count">
-                    <t t-esc="' ('+count+')'"/>
+                    <t t-esc="count"/>
                 </span>
             </span>
         </button>
diff --git a/addons/mail/static/src/xml/thread.xml b/addons/mail/static/src/xml/thread.xml
index 914168306b8..be73917a1b5 100644
--- a/addons/mail/static/src/xml/thread.xml
+++ b/addons/mail/static/src/xml/thread.xml
@@ -523,6 +523,7 @@
                 <div class="o_image_box">
                     <div class="o_attachment_image" t-attf-style="background-image:url('/web/image/#{attachment.id}/160x160/?crop=true')"/>
                     <div t-attf-class="o_image_overlay o_attachment_view"  t-att-data-id="attachment.id">
+                        <span class="fa fa-times o_attachment_delete_cross" t-att-title="'Delete ' + attachment.name" t-att-data-id="attachment.id" t-att-data-name="attachment.name"/>
                         <span class="o_attachment_title text-white"><t t-esc="attachment.name"/></span>
                         <a class="o_attachment_download" t-att-href='attachment.url'>
                             <i t-attf-class="fa fa-download text-white" t-att-title="'Download ' + attachment.name" role="img" aria-label="Download"></i>
@@ -546,6 +547,7 @@
         <t t-set="type" t-value="attachment.mimetype and attachment.mimetype.split('/').shift()"/>
         <div t-attf-class="o_attachment #{ editable ? 'o_attachment_editable' : '' } #{attachment.upload ? 'o_attachment_uploading' : ''}" t-att-title="attachment.name">
             <div class="o_attachment_wrap">
+                <span t-if="!editable" class="fa fa-times o_attachment_delete_cross" t-att-title="'Delete ' + attachment.name" t-att-data-id="attachment.id" t-att-data-name="attachment.name"/>
                 <t t-set="has_preview" t-value="type == 'image' or type == 'video' or attachment.mimetype == 'application/pdf'"/>
                 <t t-set="ext" t-value="attachment.filename.split('.').pop()"/>
 
diff --git a/addons/mail/static/tests/chatter_tests.js b/addons/mail/static/tests/chatter_tests.js
index 30225bd041a..6b1d318d43b 100644
--- a/addons/mail/static/tests/chatter_tests.js
+++ b/addons/mail/static/tests/chatter_tests.js
@@ -292,7 +292,7 @@ QUnit.test('Activity Done keep feedback on blur', function (assert) {
 });
 
 QUnit.test('attachmentBox basic rendering', function (assert) {
-    assert.expect(11);
+    assert.expect(19);
     this.data.partner.records.push({
         id: 7,
         display_name: "attachment_test",
@@ -334,6 +334,19 @@ QUnit.test('attachmentBox basic rendering', function (assert) {
     assert.containsOnce(form, '.o_attachment_image', "there should be an image preview");
     assert.containsOnce(form, '.o_attachments_previews', "there should be a list of previews");
     assert.containsOnce(form, '.o_attachments_list', "there should be a list of non previewable attachments");
+    assert.containsOnce(form, '.o_upload_attachments_button', "there should be an 'Add Attachments' button");
+    assert.containsOnce(form, '.o_form_binary_form', "there should be a binary form");
+
+    assert.containsOnce(form, 'input[name="model"]', "there should be an model input");
+    var $modelInput = form.$('input[name="model"]');
+    assert.hasAttrValue($modelInput, 'value', 'partner');
+    assert.hasAttrValue($modelInput, 'type', 'hidden');
+
+    assert.containsOnce(form, 'input[name="model"]', "there should be an id input");
+    var $resIdInput = form.$('input[name="id"]');
+    assert.hasAttrValue($resIdInput, 'value', '7');
+    assert.hasAttrValue($resIdInput, 'type', 'hidden');
+
     assert.strictEqual(form.$('.o_attachment_title').text(), 'name1',
         "the image name should be correct");
     // since there are two elements "Download name2"; one "name" and the other "txt" as text content, the following test