diff --git a/.rubocop.yml b/.rubocop.yml
index 795fbb61f..feaf4db68 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -44,6 +44,11 @@ Void:
   Exclude:
     - 'spec/**/*'
 
+# allow should == nil in spec
+Style/NilComparison:
+  Exclude:
+    - 'spec/**/*'
+
 # No need to force reduce to use |a, e| as parameters.
 # Configuration parameters: Methods.
 Style/SingleLineBlockParams:
diff --git a/Guardfile b/Guardfile
index 1910f3be7..a915ec3ee 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,5 +1,5 @@
-group :red_green_refactor, halt_on_fail:true do
-  guard :rspec, cmd: 'bundle exec rspec' do
+group :red_green_refactor, halt_on_fail: true do
+  guard :rspec, cmd: 'bundle exec rspec', notification: false do
     watch(%r{^spec/.+_spec\.rb$})
     watch(%r{^lib/(.+)\.rb$})     { |m| "spec/lib/#{m[1]}_spec.rb" }
     watch('spec/spec_helper.rb')  { "spec" }
@@ -26,7 +26,7 @@ group :red_green_refactor, halt_on_fail:true do
 
   # Martin does not want rubocop
   unless Socket.gethostname == 'martin'
-    guard :rubocop, cli: '--display-cop-names -c .rubocop-guard.yml' do
+    guard :rubocop, cli: '--display-cop-names -c .rubocop-guard.yml', notification: false do
       watch(%r{.+\.rb$})
       watch(%r{(?:.+/)?\.rubocop\.yml$}) { |m| File.dirname(m[0]) }
       watch(%r{(?:.+/)?\.rubocop-guard\.yml$}) { |m| File.dirname(m[0]) }
diff --git a/app/models/epp_session.rb b/app/models/epp_session.rb
index 325440e0d..816155f21 100644
--- a/app/models/epp_session.rb
+++ b/app/models/epp_session.rb
@@ -1,9 +1,13 @@
 class EppSession < ActiveRecord::Base
   before_save :marshal_data!
 
+  # rubocop: disable Rails/ReadWriteAttribute
+  # Turned back to read_attribute, thus in Rails 4 
+  # there is differences between self[:data] and read_attribute.
   def data
-    @data ||= self.class.unmarshal(self[:data]) || {}
+    @data ||= self.class.unmarshal(read_attribute(:data)) || {}
   end
+  # rubocop: enable Rails/ReadWriteAttribute
 
   def [](key)
     data[key.to_sym]
diff --git a/bin/robot-audit b/bin/robot-audit
index 70246edd4..ccf318ba4 100755
--- a/bin/robot-audit
+++ b/bin/robot-audit
@@ -22,7 +22,7 @@ git log origin/master -n 10 --pretty=oneline | sed -r '/^.{40} Merge branch/d' |
 echo "END_OF_GIT_LAST_COMMITS"
 
 echo "RUBOCOP_RESULTS"
-bundle exec rubocop
+bundle exec rubocop -D
 RCODE=$?
 echo "END_OF_RUBOCOP_RESULTS"