diff --git a/app/helpers/learning_objects_helper.rb b/app/helpers/learning_objects_helper.rb
index 48405d335781af8c4adb76078d41bca0960f46ee..d43dfacf1f54493a7542d792303a22daffdae49b 100644
--- a/app/helpers/learning_objects_helper.rb
+++ b/app/helpers/learning_objects_helper.rb
@@ -5,14 +5,14 @@ module LearningObjectsHelper
   end
 
   def learning_object_thumbnail(learning_object, size = "")
-    if learning_object.thumbnail.nil? || learning_object.thumbnail == "thumbnai" # TODO: remove "thumbnai" when possible
+    if learning_object.thumbnail.nil?
       if size == "large"
-        image_tag('learning-object-preview-large.png')
+        image_tag 'learning-object-preview-large.png', class: "thumbnail"
       else
-        image_tag('learning-object-preview.png')
+        image_tag 'learning-object-preview.png', class: "thumbnail"
       end
     else
-      image_tag learning_object.thumbnail, alt: learning_object_title(learning_object)
+      image_tag learning_object.thumbnail, alt: learning_object_title(learning_object), class: "thumbnail"
     end
   end
 
diff --git a/app/views/learning_objects/_learning_object_horizontal.erb b/app/views/learning_objects/_learning_object_horizontal.erb
index 504d5190d3011f9d9503724c15edb159b87c8e7f..cbc9f321f9c3c34de7011b4b940480d05e2e05f5 100644
--- a/app/views/learning_objects/_learning_object_horizontal.erb
+++ b/app/views/learning_objects/_learning_object_horizontal.erb
@@ -15,7 +15,7 @@
 
     <div class="media-body">
       <%= link_to link do %>
-          <h4><%= learning_object_title learning_object %></h4>
+          <h4 class="media-heading"><%= learning_object_title learning_object %></h4>
       <% end %>
 
       <span>Por <%= link_to 'João', '#' %></span><br/>
diff --git a/app/views/learning_objects/_learning_object_vertical.erb b/app/views/learning_objects/_learning_object_vertical.erb
index 2ebbc5ee9fadf0926e1fabe282d9ee32054cde98..2107a957a057fbffbe22486548e2cd327e0aaef6 100644
--- a/app/views/learning_objects/_learning_object_vertical.erb
+++ b/app/views/learning_objects/_learning_object_vertical.erb
@@ -9,10 +9,10 @@
       <% end %>
     </div>
     <div class="panel-body">
-          <h4 class="media-heading"><%= learning_object_title(learning_object) %></h4>
+      <h4 class="media-heading"><%= learning_object_title(learning_object) %></h4>
       <span class="glyphicon glyphicon-eye-open"><%= learning_object.views %>&nbsp;</span>
       <span class="glyphicon glyphicon-star"><%= learning_object.likes %>&nbsp;</span>
       <span>Por <a>Usuário&nbsp;</a></span>
     </div>
   </div>
-</div>
\ No newline at end of file
+</div>