diff --git a/addons/mail/static/src/components/messaging_menu/messaging_menu.scss b/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
index 181c2451085..868c7464d6e 100644
--- a/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
+++ b/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
@@ -21,7 +21,7 @@
 
     &:not(.o-mobile) {
         flex: 0 1 auto;
-        width: 350px;
+        width: 450px;
         min-height: 50px;
         /**
         * Note: Min() refers to CSS min() and not SCSS min().
@@ -106,7 +106,6 @@
 }
 
 .o_MessagingMenu_dropdownMenuHeader {
-    border-bottom: $border-width solid gray('400');
     z-index: 1;
 }
 
diff --git a/addons/mail/static/src/components/messaging_menu/messaging_menu.xml b/addons/mail/static/src/components/messaging_menu/messaging_menu.xml
index 7eb6ded8a3e..ca5a0589752 100644
--- a/addons/mail/static/src/components/messaging_menu/messaging_menu.xml
+++ b/addons/mail/static/src/components/messaging_menu/messaging_menu.xml
@@ -16,12 +16,12 @@
                     </t>
                 </a>
                 <t t-if="messagingMenu.isOpen">
-                    <div class="o_MessagingMenu_dropdownMenu dropdown-menu dropdown-menu-right" t-att-class="{ 'o-mobile': messaging.device.isMobile, 'o-messaging-not-initialized': !messaging.isInitialized }" role="menu">
+                    <div class="o_MessagingMenu_dropdownMenu dropdown-menu dropdown-menu-right border" t-att-class="{ 'o-mobile': messaging.device.isMobile, 'o-messaging-not-initialized': !messaging.isInitialized }" role="menu">
                         <t t-if="!messaging.isInitialized">
                             <span><i class="o_MessagingMenu_dropdownLoadingIcon fa fa-circle-o-notch fa-spin"/>Please wait...</span>
                         </t>
                         <t t-else="">
-                            <div class="o_MessagingMenu_dropdownMenuHeader" t-att-class="{ 'o-mobile': messaging.device.isMobile }">
+                            <div class="o_MessagingMenu_dropdownMenuHeader border-bottom" t-att-class="{ 'o-mobile': messaging.device.isMobile }">
                                 <t t-if="!messaging.device.isMobile">
                                     <t t-foreach="['all', 'chat', 'channel']" t-as="tabId" t-key="tabId">
                                         <button class="o_MessagingMenu_tabButton o-desktop btn btn-link" t-att-class="{ 'o-active': messagingMenu.activeTabId === tabId, }" t-on-click="_onClickDesktopTabButton" type="button" role="tab" t-att-data-tab-id="tabId">
diff --git a/addons/mail/static/src/components/notification_group/notification_group.scss b/addons/mail/static/src/components/notification_group/notification_group.scss
index 88a67002d82..e47d62e9fca 100644
--- a/addons/mail/static/src/components/notification_group/notification_group.scss
+++ b/addons/mail/static/src/components/notification_group/notification_group.scss
@@ -16,10 +16,6 @@
     @include o-mail-notification-list-item-content-layout();
 }
 
-.o_NotificationGroup_core {
-    @include o-mail-notification-list-item-core-layout();
-}
-
 .o_NotificationGroup_coreItem {
     @include o-mail-notification-list-item-core-item-layout();
 }
@@ -68,10 +64,6 @@
     @include o-mail-notification-list-item-style();
 }
 
-.o_NotificationGroup_core {
-    @include o-mail-notification-list-item-core-style();
-}
-
 .o_NotificationGroup_counter {
     @include o-mail-notification-list-item-bold-style();
 }
diff --git a/addons/mail/static/src/components/notification_group/notification_group.xml b/addons/mail/static/src/components/notification_group/notification_group.xml
index 58f65f98695..337dcb2e3c2 100644
--- a/addons/mail/static/src/components/notification_group/notification_group.xml
+++ b/addons/mail/static/src/components/notification_group/notification_group.xml
@@ -14,9 +14,11 @@
                         <span class="o_NotificationGroup_name text-truncate">
                             <t t-esc="notificationGroupView.notificationGroup.res_model_name"/>
                         </span>
-                        <span class="o_NotificationGroup_counter">
-                            (<t t-esc="notificationGroupView.notificationGroup.notifications.length"/>)
-                        </span>
+                        <t t-if="notificationGroupView.notificationGroup.notifications.length > 1">
+                            <span class="o_NotificationGroup_counter">
+                                (<t t-esc="notificationGroupView.notificationGroup.notifications.length"/>)
+                            </span>
+                        </t>
                         <span class="o-autogrow"/>
                         <t t-if="notificationGroupView.notificationGroup.date">
                             <span class="o_NotificationGroup_date">
@@ -24,7 +26,7 @@
                             </span>
                         </t>
                     </div>
-                    <div class="o_NotificationGroup_core">
+                    <div class="o_NotificationGroup_core d-flex align-items-baseline">
                         <span class="o_NotificationGroup_coreItem o_NotificationGroup_inlineText text-truncate">
                             <t t-if="notificationGroupView.notificationGroup.notification_type === 'email'">
                                 An error occurred when sending an email.
diff --git a/addons/mail/static/src/components/notification_list/notification_list.scss b/addons/mail/static/src/components/notification_list/notification_list.scss
index 18e3114952c..ad1b011f533 100644
--- a/addons/mail/static/src/components/notification_list/notification_list.scss
+++ b/addons/mail/static/src/components/notification_list/notification_list.scss
@@ -28,10 +28,6 @@
 // Style
 // ------------------------------------------------------------------
 
-.o_NotificationList_separator {
-    border-bottom: $border-width solid $border-color;
-}
-
 .o_NotificationList_noConversation {
     color: $text-muted;
 }
diff --git a/addons/mail/static/src/components/notification_list/notification_list.xml b/addons/mail/static/src/components/notification_list/notification_list.xml
index 8e5233405f5..cba81a3a56e 100644
--- a/addons/mail/static/src/components/notification_list/notification_list.xml
+++ b/addons/mail/static/src/components/notification_list/notification_list.xml
@@ -39,7 +39,7 @@
                             />
                         </t>
                         <t t-if="!notificationView_last">
-                            <div class="o_NotificationList_separator"/>
+                            <div class="o_NotificationList_separator border-bottom"/>
                         </t>
                     </t>
                 </t>
diff --git a/addons/mail/static/src/components/notification_list/notification_list_item.scss b/addons/mail/static/src/components/notification_list/notification_list_item.scss
index ead2c8b11c2..def8ec8f33b 100644
--- a/addons/mail/static/src/components/notification_list/notification_list_item.scss
+++ b/addons/mail/static/src/components/notification_list/notification_list_item.scss
@@ -22,10 +22,6 @@
     margin: map-get($spacers, 2);
 }
 
-@mixin o-mail-notification-list-item-core-layout {
-    display: flex;
-}
-
 @mixin o-mail-notification-list-item-core-item-layout {
     margin: map-get($spacers, 0) map-get($spacers, 2);
 
@@ -39,7 +35,7 @@
 }
 
 @mixin o-mail-notification-list-item-counter-layout() {
-    margin: map-get($spacers, 0) map-get($spacers, 2);
+    margin: map-get($spacers, 0) map-get($spacers, 1);
 }
 
 @mixin o-mail-notification-list-item-date-layout() {
@@ -48,7 +44,6 @@
 
 @mixin o-mail-notification-list-item-header-layout {
     display: flex;
-    margin-bottom: map-get($spacers, 1);
 }
 
 @mixin o-mail-notification-list-item-image-layout {
@@ -121,20 +116,15 @@ $o-mail-notification-list-item-muted-hover-background-color:
 }
 
 @mixin o-mail-notification-list-item-bold-style {
-    font-weight: bold;
+    font-weight: $font-weight-bold;
 
     &.o-muted {
-        font-weight: initial;
+        color: gray('600');
     }
 }
 
-@mixin o-mail-notification-list-item-core-style {
-    color: gray('500');
-}
-
 @mixin o-mail-notification-list-item-date-style() {
-    @include o-mail-notification-list-item-bold-style();
-    font-size: x-small;
+    font-size: $font-size-sm;
     color: gray('500');
 }
 
@@ -143,7 +133,7 @@ $o-mail-notification-list-item-muted-hover-background-color:
 }
 
 @mixin o-mail-notification-list-item-mark-as-read-style() {
-    opacity: 0;
+    color: gray('300');
 
     &:hover {
         color: gray('600');
diff --git a/addons/mail/static/src/components/notification_request/notification_request.scss b/addons/mail/static/src/components/notification_request/notification_request.scss
index e2fcb81d330..7ef8a2cd424 100644
--- a/addons/mail/static/src/components/notification_request/notification_request.scss
+++ b/addons/mail/static/src/components/notification_request/notification_request.scss
@@ -10,10 +10,6 @@
     @include o-mail-notification-list-item-content-layout();
 }
 
-.o_NotificationRequest_core {
-    @include o-mail-notification-list-item-core-layout();
-}
-
 .o_NotificationRequest_coreItem {
     @include o-mail-notification-list-item-core-item-layout();
 }
@@ -60,10 +56,6 @@
     }
 }
 
-.o_NotificationRequest_core {
-    @include o-mail-notification-list-item-core-style();
-}
-
 .o_NotificationRequest_image {
     @include o-mail-notification-list-item-image-style();
 }
diff --git a/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.scss b/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.scss
index 5de87f8bf1f..a6791ee9b13 100644
--- a/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.scss
+++ b/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.scss
@@ -4,20 +4,12 @@
 
 .o_ThreadNeedactionPreview {
     @include o-mail-notification-list-item-layout();
-
-    &:hover .o_ThreadNeedactionPreview_markAsRead {
-        opacity: 1;
-    }
 }
 
 .o_ThreadNeedactionPreview_content {
     @include o-mail-notification-list-item-content-layout();
 }
 
-.o_ThreadNeedactionPreview_core {
-    @include o-mail-notification-list-item-core-layout();
-}
-
 .o_ThreadNeedactionPreview_coreItem {
     @include o-mail-notification-list-item-core-item-layout();
 }
@@ -68,21 +60,14 @@
 
 .o_ThreadNeedactionPreview {
     @include o-mail-notification-list-item-style();
-    background-color: rgba($o-brand-primary, 0.1);
 
     &:hover {
-        background-color: rgba($o-brand-primary, 0.2);
-
         .o_ThreadNeedactionPreview_partnerImStatusIcon {
             @include o-mail-notification-list-item-hover-partner-im-status-icon-style();
         }
     }
 }
 
-.o_ThreadNeedactionPreview_core {
-    @include o-mail-notification-list-item-core-style();
-}
-
 .o_ThreadNeedactionPreview_counter {
     @include o-mail-notification-list-item-bold-style();
 }
diff --git a/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.xml b/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.xml
index 8a795477292..0b64d9157c5 100644
--- a/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.xml
+++ b/addons/mail/static/src/components/thread_needaction_preview/thread_needaction_preview.xml
@@ -27,9 +27,11 @@
                         <span class="o_ThreadNeedactionPreview_name text-truncate" t-att-class="{ 'o-mobile': messaging.device.isMobile }">
                             <t t-esc="threadNeedactionPreviewView.thread.displayName"/>
                         </span>
-                        <span class="o_ThreadNeedactionPreview_counter">
-                            (<t t-esc="threadNeedactionPreviewView.thread.needactionMessagesAsOriginThread.length"/>)
-                        </span>
+                        <t t-if="threadNeedactionPreviewView.thread.needactionMessagesAsOriginThread.length > 1">
+                            <span class="o_ThreadNeedactionPreview_counter">
+                                (<t t-esc="threadNeedactionPreviewView.thread.needactionMessagesAsOriginThread.length"/>)
+                            </span>
+                        </t>
                         <span class="o-autogrow"/>
                         <t t-if="threadNeedactionPreviewView.thread.lastNeedactionMessageAsOriginThread and threadNeedactionPreviewView.thread.lastNeedactionMessageAsOriginThread.date">
                             <span class="o_ThreadNeedactionPreview_date">
@@ -37,7 +39,7 @@
                             </span>
                         </t>
                     </div>
-                    <div class="o_ThreadNeedactionPreview_core">
+                    <div class="o_ThreadNeedactionPreview_core d-flex align-items-baseline">
                         <span class="o_ThreadNeedactionPreview_coreItem o_ThreadNeedactionPreview_inlineText text-truncate" t-att-class="{ 'o-empty': inlineLastNeedactionMessageAsOriginThreadBody.length === 0 }">
                             <t t-if="threadNeedactionPreviewView.messageAuthorPrefixView">
                                 <MessageAuthorPrefix localId="threadNeedactionPreviewView.messageAuthorPrefixView.localId"/>
diff --git a/addons/mail/static/src/components/thread_preview/thread_preview.scss b/addons/mail/static/src/components/thread_preview/thread_preview.scss
index 89eec69ca10..d0f4fc49b86 100644
--- a/addons/mail/static/src/components/thread_preview/thread_preview.scss
+++ b/addons/mail/static/src/components/thread_preview/thread_preview.scss
@@ -14,10 +14,6 @@
     @include o-mail-notification-list-item-content-layout();
 }
 
-.o_ThreadPreview_core {
-    @include o-mail-notification-list-item-core-layout();
-}
-
 .o_ThreadPreview_coreItem {
     @include o-mail-notification-list-item-core-item-layout();
 }
@@ -88,10 +84,6 @@
     color: red;
 }
 
-.o_ThreadPreview_core {
-    @include o-mail-notification-list-item-core-style();
-}
-
 .o_ThreadPreview_counter {
     @include o-mail-notification-list-item-bold-style();
 }
diff --git a/addons/mail/static/src/components/thread_preview/thread_preview.xml b/addons/mail/static/src/components/thread_preview/thread_preview.xml
index 58d1ca85653..07172fa03b8 100644
--- a/addons/mail/static/src/components/thread_preview/thread_preview.xml
+++ b/addons/mail/static/src/components/thread_preview/thread_preview.xml
@@ -28,8 +28,8 @@
                         <span class="o_ThreadPreview_name text-truncate" t-att-class="{ 'o-mobile': messaging.device.isMobile, 'o-muted': threadPreviewView.thread.localMessageUnreadCounter === 0 }">
                             <t t-esc="threadPreviewView.thread.displayName"/>
                         </span>
-                        <t t-if="threadPreviewView.thread.localMessageUnreadCounter > 0">
-                            <span class="o_ThreadPreview_counter" t-att-class="{ 'o-muted': threadPreviewView.thread.localMessageUnreadCounter === 0 }">
+                        <t t-if="threadPreviewView.thread.localMessageUnreadCounter > 1">
+                            <span class="o_ThreadPreview_counter">
                                 (<t t-esc="threadPreviewView.thread.localMessageUnreadCounter"/>)
                             </span>
                         </t>
@@ -43,7 +43,7 @@
                             </span>
                         </t>
                     </div>
-                    <div class="o_ThreadPreview_core">
+                    <div class="o_ThreadPreview_core d-flex align-items-baseline">
                         <span class="o_ThreadPreview_coreItem o_ThreadPreview_inlineText text-truncate" t-att-class="{ 'o-empty': inlineLastMessageBody.length === 0 }">
                             <t t-if="threadPreviewView.messageAuthorPrefixView">
                                 <MessageAuthorPrefix localId="threadPreviewView.messageAuthorPrefixView.localId"/>
diff --git a/addons/mail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js b/addons/mail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
index 87e39ecf144..7a91a8785cd 100644
--- a/addons/mail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
+++ b/addons/mail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
@@ -19,12 +19,18 @@ QUnit.test('notification group basic layout', async function (assert) {
         res_id: mailChannelId1,
         res_model_name: "Channel", // random res model name, will be asserted in the test
     });
-    // failure that is expected to be used in the test
-    pyEnv['mail.notification'].create({
-        mail_message_id: mailMessageId1, // id of the related message
-        notification_status: 'exception', // necessary value to have a failure
-        notification_type: 'email', // expected failure type for email message
-    });
+    pyEnv['mail.notification'].create([
+        {
+            mail_message_id: mailMessageId1,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
+        {
+            mail_message_id: mailMessageId1,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
+    ]);
     const { createNotificationListComponent } = await start();
     await createNotificationListComponent();
     assert.containsOnce(
@@ -49,8 +55,8 @@ QUnit.test('notification group basic layout', async function (assert) {
     );
     assert.strictEqual(
         document.querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have only 1 notification in the group"
+        "(2)",
+        "should have 2 notifications in the group"
     );
     assert.containsOnce(
         document.body,
@@ -327,17 +333,26 @@ QUnit.test('different mail.channel are not grouped', async function (assert) {
         },
     ]);
     pyEnv['mail.notification'].create([
-        // first failure that is expected to be used in the test
         {
             mail_message_id: mailMessageId1, // id of the related first message
             notification_status: 'exception', // one possible value to have a failure
             notification_type: 'email', // expected failure type for email message
-        }, // second failure that is expected to be used in the test
+        },
+        {
+            mail_message_id: mailMessageId1,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
         {
             mail_message_id: mailMessageId2, // id of the related second message
             notification_status: 'bounce', // other possible value to have a failure
             notification_type: 'email', // expected failure type for email message
         },
+        {
+            mail_message_id: mailMessageId2,
+            notification_status: 'bounce',
+            notification_type: 'email',
+        },
     ]);
     const { createNotificationListComponent } = await start({
         // needed to assert thread.open
@@ -358,8 +373,8 @@ QUnit.test('different mail.channel are not grouped', async function (assert) {
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in first group"
+        "(2)",
+        "should have 2 notifications in first group"
     );
     assert.containsOnce(
         groups[1],
@@ -368,8 +383,8 @@ QUnit.test('different mail.channel are not grouped', async function (assert) {
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in second group"
+        "(2)",
+        "should have 2 notifications in second group"
     );
 
     await afterNextRender(() => groups[0].click());
@@ -401,18 +416,26 @@ QUnit.test('multiple grouped notifications by document model, sorted by the most
         },
     ]);
     pyEnv['mail.notification'].create([
-        // first failure that is expected to be used in the test
         {
             mail_message_id: mailMessageId1, // id of the related first message
             notification_status: 'exception', // one possible value to have a failure
             notification_type: 'email', // expected failure type for email message
         },
-        // second failure that is expected to be used in the test
+        {
+            mail_message_id: mailMessageId1,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
         {
             mail_message_id: mailMessageId2, // id of the related second message
             notification_status: 'bounce', // other possible value to have a failure
             notification_type: 'email', // expected failure type for email message
         },
+        {
+            mail_message_id: mailMessageId2,
+            notification_status: 'bounce',
+            notification_type: 'email',
+        },
     ]);
     const { createNotificationListComponent } = await start();
     await createNotificationListComponent();
@@ -440,8 +463,8 @@ QUnit.test('multiple grouped notifications by document model, sorted by the most
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in first group"
+        "(2)",
+        "should have 2 notifications in first group"
     );
     assert.containsOnce(
         groups[1],
@@ -460,8 +483,8 @@ QUnit.test('multiple grouped notifications by document model, sorted by the most
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in second group"
+        "(2)",
+        "should have 2 notifications in second group"
     );
 });
 
diff --git a/addons/mail/static/tests/qunit_suite_tests/components/thread_preview_tests.js b/addons/mail/static/tests/qunit_suite_tests/components/thread_preview_tests.js
index d543e1cba74..e0574d7bae9 100644
--- a/addons/mail/static/tests/qunit_suite_tests/components/thread_preview_tests.js
+++ b/addons/mail/static/tests/qunit_suite_tests/components/thread_preview_tests.js
@@ -11,7 +11,8 @@ QUnit.module('thread_preview_tests.js', {
 });
 
 QUnit.test('mark as read', async function (assert) {
-    assert.expect(8);
+    assert.expect(6);
+
     this.data['mail.channel'].records.push({
         id: 11,
         message_unread_counter: 1,
@@ -40,11 +41,6 @@ QUnit.test('mark as read', async function (assert) {
         '.o_ThreadPreview_markAsRead',
         "should have the mark as read button"
     );
-    assert.containsOnce(
-        document.body,
-        '.o_ThreadPreview_counter',
-        "should have an unread counter"
-    );
 
     await afterNextRender(() =>
         document.querySelector('.o_ThreadPreview_markAsRead').click()
@@ -63,11 +59,6 @@ QUnit.test('mark as read', async function (assert) {
         '.o_ThreadPreview_markAsRead',
         "should no longer have the mark as read button"
     );
-    assert.containsNone(
-        document.body,
-        '.o_ThreadPreview_counter',
-        "should no longer have an unread counter"
-    );
     assert.containsNone(
         document.body,
         '.o_ChatWindow',
diff --git a/addons/sms/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js b/addons/sms/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
index 447f19d87cf..88f2c09a908 100644
--- a/addons/sms/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
+++ b/addons/sms/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
@@ -91,18 +91,26 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
         }
     );
     this.data['mail.notification'].records.push(
-        // first failure that is expected to be used in the test
         {
             mail_message_id: 11, // id of the related first message
             notification_status: 'exception', // necessary value to have a failure
             notification_type: 'sms', // different type from second failure
         },
-        // second failure that is expected to be used in the test
+        {
+            mail_message_id: 11,
+            notification_status: 'exception',
+            notification_type: 'sms',
+        },
         {
             mail_message_id: 12, // id of the related second message
             notification_status: 'exception', // necessary value to have a failure
             notification_type: 'email', // different type from first failure
-        }
+        },
+        {
+            mail_message_id: 12,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
     );
     const { createNotificationListComponent } = await start({ data: this.data });
     await createNotificationListComponent();
@@ -131,8 +139,8 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in first group"
+        "(2)",
+        "should have 2 notifications in first group"
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_inlineText').textContent.trim(),
@@ -156,8 +164,8 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in second group"
+        "(2)",
+        "should have 2 notifications in second group"
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_inlineText').textContent.trim(),
diff --git a/addons/snailmail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js b/addons/snailmail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
index 6fe841b71f0..9bea11a000d 100644
--- a/addons/snailmail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
+++ b/addons/snailmail/static/tests/qunit_suite_tests/components/notification_list_notification_group_tests.js
@@ -85,18 +85,26 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
         }
     );
     this.data['mail.notification'].records.push(
-        // first failure that is expected to be used in the test
         {
             mail_message_id: 11, // id of the related first message
             notification_status: 'exception', // necessary value to have a failure
             notification_type: 'snail', // different type from second failure
         },
-        // second failure that is expected to be used in the test
+        {
+            mail_message_id: 11,
+            notification_status: 'exception',
+            notification_type: 'snail',
+        },
         {
             mail_message_id: 12, // id of the related second message
             notification_status: 'exception', // necessary value to have a failure
             notification_type: 'email', // different type from first failure
-        }
+        },
+        {
+            mail_message_id: 12,
+            notification_status: 'exception',
+            notification_type: 'email',
+        },
     );
     const { createNotificationListComponent } = await start({ data: this.data });
     await createNotificationListComponent();
@@ -125,8 +133,8 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in first group"
+        "(2)",
+        "should have 2 notifications in first group"
     );
     assert.strictEqual(
         groups[0].querySelector('.o_NotificationGroup_inlineText').textContent.trim(),
@@ -150,8 +158,8 @@ QUnit.test('notifications grouped by notification_type', async function (assert)
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_counter').textContent.trim(),
-        "(1)",
-        "should have 1 notification in second group"
+        "(2)",
+        "should have 2 notifications in second group"
     );
     assert.strictEqual(
         groups[1].querySelector('.o_NotificationGroup_inlineText').textContent.trim(),