diff --git a/.gitignore b/.gitignore
index 5e90d24..ca6185e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,6 @@
 .DS_Store
 .rspec_status
 .yardoc
+coverage
 doc
 Gemfile.lock
diff --git a/Gemfile b/Gemfile
index bd6bbdf..0e9c0c5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,5 +7,10 @@ gemspec
 
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
+
 gem 'rdoc'
 gem 'yard'
+
+gem 'mocha'
+gem 'simplecov'
+gem 'webmock'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index c1a13d4..665c17b 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,15 +1,43 @@
 # frozen_string_literal: true
 
-require "skyfall"
+require 'simplecov'
+
+SimpleCov.start do
+  enable_coverage :branch
+  add_filter "/spec/"
+end
+
+require 'skyfall'
+require 'webmock/rspec'
 
 RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure
   config.example_status_persistence_file_path = ".rspec_status"
 
-  # Disable RSpec exposing methods globally on `Module` and `main`
-  config.disable_monkey_patching!
-
   config.expect_with :rspec do |c|
-    c.syntax = :expect
+    c.syntax = [:should, :expect]
+  end
+
+  config.mock_with :mocha
+end
+
+module SimpleCov
+  module Formatter
+    class HTMLFormatter
+      def format(result)
+        # silence the stdout summary, just save the html files
+        unless @inline_assets
+          Dir[File.join(@public_assets_dir, "*")].each do |path|
+            FileUtils.cp_r(path, asset_output_path, remove_destination: true)
+          end
+        end
+
+        File.open(File.join(output_path, "index.html"), "wb") do |file|
+          file.puts template("layout").result(binding)
+        end
+      end
+    end
   end
 end
+
+WebMock.enable!