fix unit tests

test/unit/ban_test.rb

@@ -1,6 +1,11 @@
 require 'test_helper'
 
 class BanTest < ActiveSupport::TestCase
+  def setup
+    super
+    User.any_instance.stubs(:validate_sock_puppets).returns(true)
+  end
+
   context "A ban" do
     context "created by an admin" do
       setup do