Do not use instance vars in partials

app/views/membership_pools/_nav_tabs.html.erb

@@ -2,7 +2,7 @@
   <ul class="nav nav-tabs d-none d-sm-flex">
     <li class="nav-item">
       <%= link_to translate(:overview, scope: %i[nav_tabs membership_pool]),
-                  @membership_pool,
+                  membership_pool,
                   class: "nav-link #{:active if tab == :overview}" %>
     </li>
   </ul>
@@ -10,7 +10,7 @@
   <ul class="nav flex-column nav-pills d-flex d-sm-none">
     <li class="nav-item">
       <%= link_to translate(:overview, scope: %i[nav_tabs membership_pool]),
-                  @membership_pool,
+                  membership_pool,
                   class: "nav-link #{:active if tab == :overview}" %>
     </li>
   </ul>

app/views/membership_pools/show.html.erb

@@ -7,5 +7,6 @@
     </small>
   </h2>
 
-  <%= render partial: 'nav_tabs', locals: { tab: :overview } %>
+  <%= render partial: 'nav_tabs', locals: { membership_pool: @membership_pool,
+                                            tab: :overview } %>
 </div>

app/views/passports/_nav_tabs.html.erb

@@ -2,12 +2,12 @@
   <ul class="nav nav-tabs d-none d-sm-flex">
     <li class="nav-item">
       <%= link_to translate(:overview, scope: %i[nav_tabs passport]),
-                  @passport,
+                  passport,
                   class: "nav-link #{:active if tab == :overview}" %>
     </li>
     <li class="nav-item">
       <%= link_to translate(:confirmations, scope: %i[nav_tabs passport]),
-                  passport_passport_confirmations_path(@passport),
+                  passport_passport_confirmations_path(passport),
                   class: "nav-link #{:active if tab == :confirmations}" %>
     </li>
   </ul>
@@ -15,12 +15,12 @@
   <ul class="nav flex-column nav-pills d-flex d-sm-none">
     <li class="nav-item">
       <%= link_to translate(:overview, scope: %i[nav_tabs passport]),
-                  @passport,
+                  passport,
                   class: "nav-link #{:active if tab == :overview}" %>
     </li>
     <li class="nav-item">
       <%= link_to translate(:confirmations, scope: %i[nav_tabs passport]),
-                  passport_passport_confirmations_path(@passport),
+                  passport_passport_confirmations_path(passport),
                   class: "nav-link #{:active if tab == :confirmations}" %>
     </li>
   </ul>

app/views/passports/passport_confirmations/index.html.erb

@@ -1,5 +1,6 @@
 <div class="container">
-  <%= render partial: 'passports/nav_tabs', locals: { tab: :confirmations } %>
+  <%= render partial: 'passports/nav_tabs', locals: { passport: @passport,
+                                            tab: :confirmations } %>
 
   <% if @passport.can_have_confirmations? && current_account %>
     <div class="mb-3">

app/views/passports/show.html.erb

@@ -1,5 +1,6 @@
 <div class="container">
-  <%= render partial: 'nav_tabs', locals: { tab: :overview } %>
+  <%= render partial: 'nav_tabs', locals: { passport: @passport,
+                                            tab: :overview } %>
 
   <div>
     <% if @passport.confirmed? %>