diff --git a/Gemfile b/Gemfile
index e070117..c7dddad 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,3 +12,7 @@ gem "sprockets-rails"
 
 # Start debugger with binding.b [https://github.com/ruby/debug]
 # gem "debug", ">= 1.0.0"
+
+group :test do
+	gem 'simplecov'
+end
diff --git a/coverage/.last_run.json b/coverage/.last_run.json
new file mode 100644
index 0000000..bc2afb0
--- /dev/null
+++ b/coverage/.last_run.json
@@ -0,0 +1,5 @@
+{
+  "result": {
+    "line": 42.6
+  }
+}
diff --git a/coverage/.resultset.json.lock b/coverage/.resultset.json.lock
new file mode 100644
index 0000000..e69de29