diff --git a/CHANGELOG b/CHANGELOG
index 51f1db07e8b..040926d270d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -35,6 +35,7 @@ v 8.10.0 (unreleased)
   - Fix pagination when sorting by columns with lots of ties (like priority)
   - The Markdown reference parsers now re-use query results to prevent running the same queries multiple times !5020
   - Updated project header design
+  - Issuable collapsed assignee tooltip is now the users name
   - Exclude email check from the standard health check
   - Updated layout for Projects, Groups, Users on Admin area !4424
   - Fix changing issue state columns in milestone view
diff --git a/app/assets/javascripts/users_select.js.coffee b/app/assets/javascripts/users_select.js.coffee
index c84c4960657..e061f042ca9 100644
--- a/app/assets/javascripts/users_select.js.coffee
+++ b/app/assets/javascripts/users_select.js.coffee
@@ -56,6 +56,11 @@ class @UsersSelect
               username: ''
               avatar: ''
           $value.html(assigneeTemplate(user))
+
+          $collapsedSidebar
+            .attr('title', user.name)
+            .tooltip('fixTitle')
+
           $collapsedSidebar.html(collapsedAssigneeTemplate(user))
 
 
@@ -63,7 +68,6 @@ class @UsersSelect
         '<% if( avatar ) { %>
         <a class="author_link" href="/u/<%- username %>">
           <img width="24" class="avatar avatar-inline s24" alt="" src="<%- avatar %>">
-          <span class="author">Toni Boehm</span>
         </a>
         <% } else { %>
         <i class="fa fa-user"></i>
diff --git a/app/views/shared/issuable/_sidebar.html.haml b/app/views/shared/issuable/_sidebar.html.haml
index adfab1af53e..e020a7d4d00 100644
--- a/app/views/shared/issuable/_sidebar.html.haml
+++ b/app/views/shared/issuable/_sidebar.html.haml
@@ -19,7 +19,7 @@
 
     = form_for [@project.namespace.becomes(Namespace), @project, issuable], remote: true, format: :json, html: {class: 'issuable-context-form inline-update js-issuable-update'} do |f|
       .block.assignee
-        .sidebar-collapsed-icon.sidebar-collapsed-user{data: {toggle: "tooltip", placement: "left", container: "body"}, title: (issuable.assignee.to_reference if issuable.assignee)}
+        .sidebar-collapsed-icon.sidebar-collapsed-user{data: {toggle: "tooltip", placement: "left", container: "body"}, title: (issuable.assignee.name if issuable.assignee)}
           - if issuable.assignee
             = link_to_member(@project, issuable.assignee, size: 24)
           - else