diff --git a/.gitignore b/.gitignore
index 6378977..901f4bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,9 @@ pkg/
 # IDE files
 .idea
 
+# coverage reports
+coverage
+
 # Temporary files
 .DS_Store
 *.swp
diff --git a/Gemfile b/Gemfile
index e9a929f..0245454 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,6 +29,9 @@ group :development, :test do
   gem "fuubar",          "2.0.0"
   gem "nyan-cat-formatter", require: false
 
+  # test coverage
+  gem "simplecov", "0.10.0", require: false
+
   # test database
   gem "sqlite3"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 8928f90..fc9ea77 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -178,6 +178,7 @@ DEPENDENCIES
   rspec-instafail (= 0.2.6)
   rspec-rails (= 3.2.3)
   rubocop (= 0.32.0)
+  simplecov (= 0.10.0)
   sqlite3
 
 BUNDLED WITH
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 0d3c66e..544f03e 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -3,6 +3,11 @@ require File.join(File.dirname(__FILE__), "..", "test", "dummy", "config", "envi
 
 require "rspec/rails"
 
+require "simplecov"
+SimpleCov.start do
+  add_filter "spec"
+end
+
 require "codeclimate-test-reporter"
 CodeClimate::TestReporter.start