diff --git a/Gemfile b/Gemfile
index 042c3c757..13b824733 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/Gemfile.lock b/Gemfile.lock
index 29f746606..2328f58b6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,6 +58,7 @@ GEM
     daemons (1.4.1)
     date (3.5.1)
     diff-lcs (1.6.2)
+    docile (1.4.1)
     domain_name (0.6.20240107)
     drb (2.2.3)
     em-websocket (0.5.3)
@@ -224,6 +225,7 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 4.0)
       websocket (~> 1.0)
+    simplecov_json_formatter (0.1.4)
     sinatra (4.2.1)
       logger (>= 1.6.0)
       mustermann (~> 3.0)
@@ -335,6 +337,7 @@ DEPENDENCIES
   rubyzip (~> 3.2)
   rushover (~> 0.3.0)
   selenium-webdriver (~> 4.40)
+  simplecov (~> 0.22)
   sinatra (~> 4.1)
   slack-notifier (~> 2.4)
   sqlite3 (~> 2.9)
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ee4416be9..0ca259328 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -3,6 +3,17 @@
 # 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