Fix tests

app/models/user/role.rb

@@ -18,7 +18,7 @@ module User::Role
     admin? || other == self
   end
 
-  def can_administer?
+  def can_administer?(other)
     admin? && other != self
   end
 

app/views/account/settings/show.html.erb

@@ -3,7 +3,7 @@
 <% content_for :header do %>
   <h1 class="header__title">
     <%= @page_title %>
-    <% unless Current.user.can_administer?%>
+    <% unless Current.user.admin? %>
       <div class="txt-normal font-weight-normal">Only admins can change these settings</div>
     <% end %>
   </h1>