diff --git a/.simplecov b/.simplecov
new file mode 100644
index 0000000..ebb80e6
--- /dev/null
+++ b/.simplecov
@@ -0,0 +1,4 @@
+SimpleCov.start do
+  add_filter "/spec/"
+  add_filter "/tmp/"
+end
diff --git a/features/support/env.rb b/features/support/env.rb
index 2e9be06..520925e 100644
--- a/features/support/env.rb
+++ b/features/support/env.rb
@@ -1,7 +1,6 @@
 PROJECT_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..', '..'))
 
 require "simplecov"
-SimpleCov.start
 
 $: << File.join(PROJECT_ROOT, 'lib')
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3d92cad..3093696 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -6,7 +6,6 @@ require 'rspec'
 require 'rspec/autorun'
 
 require "simplecov"
-SimpleCov.start
 
 require 'factory_girl'
 require "mocha"