diff --git a/app/controllers/problems_controller.rb b/app/controllers/problems_controller.rb
--- a/app/controllers/problems_controller.rb
+++ b/app/controllers/problems_controller.rb
@@ -135,6 +135,14 @@
     end
   end
 
+  def toggle_view_testcase
+    @problem = Problem.find(params[:id])
+    @problem.update_attributes(view_testcase: !(@problem.view_testcase?) )
+    respond_to do |format|
+      format.js { }
+    end
+  end
+
   def turn_all_off
     Problem.available.all.each do |problem|
       problem.available = false
@@ -222,10 +230,6 @@
     redirect_to :action => 'manage'
   end
 
-  def show_testcase
-    @problem = Problem.includes(:testcases).find(params[:id])
-  end
-
   ##################################
   protected