diff --git a/app/views/layouts/maintenance_tasks/_navbar.html.erb b/app/views/layouts/maintenance_tasks/_navbar.html.erb
index 1666d928c..e651f9b0e 100644
--- a/app/views/layouts/maintenance_tasks/_navbar.html.erb
+++ b/app/views/layouts/maintenance_tasks/_navbar.html.erb
@@ -1,4 +1,4 @@
-<nav class="navbar" role="navigation" aria-label="main navigation">
+<nav class="navbar" role="navigation" aria-label="Main navigation">
   <div class="navbar-brand">
     <%= link_to 'Maintenance Tasks', root_path, class: 'navbar-item is-size-4 has-text-weight-semibold has-text-danger' %>
   </div>
diff --git a/app/views/maintenance_tasks/runs/_run.html.erb b/app/views/maintenance_tasks/runs/_run.html.erb
index b1d1dc776..68d5a9079 100644
--- a/app/views/maintenance_tasks/runs/_run.html.erb
+++ b/app/views/maintenance_tasks/runs/_run.html.erb
@@ -46,6 +46,6 @@
     <% elsif run.active? %>
       <%= button_to 'Pause', pause_task_run_path(@task, run), class: 'button is-warning', disabled: @task.deleted? %>
       <%= button_to 'Cancel', cancel_task_run_path(@task, run), class: 'button is-danger' %>
-    <% end%>
+    <% end %>
   </div>
 </details>
diff --git a/app/views/maintenance_tasks/runs/info/_errored.html.erb b/app/views/maintenance_tasks/runs/info/_errored.html.erb
index c92f7de5b..a40336351 100644
--- a/app/views/maintenance_tasks/runs/info/_errored.html.erb
+++ b/app/views/maintenance_tasks/runs/info/_errored.html.erb
@@ -1,5 +1,5 @@
 <p>
-  Ran for <%= time_running_in_words run  %> until an error happened
+  Ran for <%= time_running_in_words run %> until an error happened
   <%= time_ago run.ended_at %>.
 </p>
 
diff --git a/app/views/maintenance_tasks/runs/info/_paused.html.erb b/app/views/maintenance_tasks/runs/info/_paused.html.erb
index aaec31773..ad84b0353 100644
--- a/app/views/maintenance_tasks/runs/info/_paused.html.erb
+++ b/app/views/maintenance_tasks/runs/info/_paused.html.erb
@@ -1,5 +1,5 @@
 <p>
-  Ran for <%= time_running_in_words run  %> until paused,
+  Ran for <%= time_running_in_words run %> until paused,
   <% if (time_to_completion = run.time_to_completion) %>
     <%= distance_of_time_in_words(time_to_completion) %> remaining.
   <% else %>
diff --git a/app/views/maintenance_tasks/runs/info/_running.html.erb b/app/views/maintenance_tasks/runs/info/_running.html.erb
index ee6f0ccfd..29d20d36b 100644
--- a/app/views/maintenance_tasks/runs/info/_running.html.erb
+++ b/app/views/maintenance_tasks/runs/info/_running.html.erb
@@ -1,3 +1,3 @@
 <% if (time_to_completion = run.time_to_completion) %>
-  <p>Running for <%= time_running_in_words(run)  %>. <%= distance_of_time_in_words(time_to_completion).capitalize %> remaining.</p>
+  <p>Running for <%= time_running_in_words(run) %>. <%= distance_of_time_in_words(time_to_completion).capitalize %> remaining.</p>
 <% end %>
diff --git a/app/views/maintenance_tasks/runs/info/_succeeded.html.erb b/app/views/maintenance_tasks/runs/info/_succeeded.html.erb
index 31a757eed..18dc4fa55 100644
--- a/app/views/maintenance_tasks/runs/info/_succeeded.html.erb
+++ b/app/views/maintenance_tasks/runs/info/_succeeded.html.erb
@@ -2,4 +2,3 @@
   Ran for <%= time_running_in_words run %>,
   finished <%= time_ago run.ended_at %>.
 </p>
-
diff --git a/app/views/maintenance_tasks/tasks/show.html.erb b/app/views/maintenance_tasks/tasks/show.html.erb
index 986c6aaee..54d0d3ea6 100644
--- a/app/views/maintenance_tasks/tasks/show.html.erb
+++ b/app/views/maintenance_tasks/tasks/show.html.erb
@@ -44,7 +44,7 @@
 
 <%= tag.div(data: { refresh: @task.refresh? || "" }) do %>
   <% if @task.active_runs.any? %>
-    <hr/>
+    <hr>
 
     <h4 class="title is-4">Active Runs</h4>
 
@@ -52,7 +52,7 @@
   <% end %>
 
   <% if @task.runs_page.records.present? %>
-    <hr/>
+    <hr>
 
     <h4 class="title is-5 has-text-weight-bold">Previous Runs</h4>
 
diff --git a/test/dummy/app/views/layouts/mailer.html.erb b/test/dummy/app/views/layouts/mailer.html.erb
index cbd34d2e9..3aac9002e 100644
--- a/test/dummy/app/views/layouts/mailer.html.erb
+++ b/test/dummy/app/views/layouts/mailer.html.erb
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
     <style>
       /* Email styles need to be inline */
     </style>
diff --git a/test/dummy/app/views/posts/index.html.erb b/test/dummy/app/views/posts/index.html.erb
index 64c11af14..605e7b26a 100644
--- a/test/dummy/app/views/posts/index.html.erb
+++ b/test/dummy/app/views/posts/index.html.erb
@@ -31,4 +31,4 @@
 
 <h4>Maintenance Tasks in <code>&lt;iframe&gt;</code></h4>
 
-<iframe id="maintenance-tasks-iframe" src="<%= maintenance_tasks_path %>"></iframe>
+<iframe id="maintenance-tasks-iframe" title="Maintenance Tasks" src="<%= maintenance_tasks_path %>"></iframe>