diff --git a/.simplecov b/.simplecov
new file mode 100644
index 000000000..737a1945c
--- /dev/null
+++ b/.simplecov
@@ -0,0 +1,8 @@
+SimpleCov.start 'rails' do
+  add_filter '/app/models/legacy/'
+  add_filter '/app/models/version/'
+  add_filter '/lib/action_controller/'
+  add_filter '/lib/core_ext/'
+  add_filter '/lib/daemons/'
+  add_filter '/lib/gem_ext/'
+end
\ No newline at end of file
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3e1825acb..f10463346 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,6 @@
 if ENV['COVERAGE']
   require 'simplecov'
   SimpleCov.command_name 'spec'
-  SimpleCov.start 'rails'
 end
 
 require 'webmock/rspec'
diff --git a/test/test_helper.rb b/test/test_helper.rb
index ce5666ece..c040ac346 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,7 +1,6 @@
 if ENV['COVERAGE']
   require 'simplecov'
   SimpleCov.command_name 'test'
-  SimpleCov.start 'rails'
 end
 
 ENV['RAILS_ENV'] ||= 'test'