diff --git a/Gemfile b/Gemfile
index 3751c4725..dcbb6be0e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -61,6 +61,7 @@ end
 
 # For running unit tests
 group :test do
+  gem 'simplecov', '~> 0.22'
   gem 'test-unit-full', '~> 0.0.5'
   gem 'rspec', '~> 3.13'
   gem 'rdoc', '~> 7.1'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ee4416be9..b4a4e7df2 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -3,6 +3,16 @@
 # Browser Exploitation Framework (BeEF) - https://beefproject.com
 # See the file 'doc/COPYING' for copying permission
 #
+# Coverage must start before loading application code.
+require 'simplecov'
+SimpleCov.start do
+  add_filter '/spec/'
+  add_group 'Core', 'core'
+  add_group 'Extensions', 'extensions'
+  add_group 'Modules', 'modules'
+  track_files '{core,extensions,modules}/**/*.rb'
+end
+
 # Set external and internal character encodings to UTF-8
 Encoding.default_external = Encoding::UTF_8
 Encoding.default_internal = Encoding::UTF_8
@@ -377,4 +387,4 @@ module SpecActiveRecordConnection
       ActiveRecord::Migrator.new(:up, context.migrations, context.schema_migration, context.internal_metadata).migrate
     end
   end
-end
\ No newline at end of file
+end