diff --git a/app/views/legislation/processes/_key_dates.html.erb b/app/views/legislation/processes/_key_dates.html.erb
index f1fde827a..9d8239039 100644
--- a/app/views/legislation/processes/_key_dates.html.erb
+++ b/app/views/legislation/processes/_key_dates.html.erb
@@ -6,7 +6,7 @@
 
         <ul>
           <% if process.debate_phase.enabled? %>
-            <li <%= "class=active" if phase == :debate_phase %>>
+            <li <%= 'class="active"' if phase == :debate_phase %>>
               <%= link_to debate_legislation_process_path(process) do %>
                 <h4><%= t('legislation.processes.shared.debate_dates') %></h4>
                 <p><%= format_date(process.debate_start_date) %> - <%= format_date(process.debate_end_date) %></p>
@@ -15,7 +15,7 @@
           <% end %>
 
           <% if process.draft_publication.enabled? %>
-            <li <%= "class=active" if phase == :draft_publication %>>
+            <li <%= 'class="active"' if phase == :draft_publication %>>
               <%= link_to draft_publication_legislation_process_path(process) do %>
                 <h4><%= t('legislation.processes.shared.draft_publication_date') %></h4>
                 <p><%= format_date(process.draft_publication_date) %></p>
@@ -24,7 +24,7 @@
           <% end %>
 
           <% if process.allegations_phase.enabled? %>
-            <li <%= "class=active" if phase == :allegations_phase %>>
+            <li <%= 'class="active"' if phase == :allegations_phase %>>
               <%= link_to allegations_legislation_process_path(process) do %>
                 <h4><%= t('legislation.processes.shared.allegations_dates') %></h4>
                 <p><%= format_date(process.allegations_start_date) %> - <%= format_date(process.allegations_end_date) %></p>
@@ -33,7 +33,7 @@
           <% end %>
 
           <% if process.result_publication.enabled? %>
-            <li <%= "class=active" if phase == :result_publication %>>
+            <li <%= 'class="active"' if phase == :result_publication %>>
               <%= link_to result_publication_legislation_process_path(process) do %>
                 <h4><%= t('legislation.processes.shared.result_publication_date') %></h4>
                 <p><%= format_date(process.result_publication_date) %></p>