diff --git a/.rubocop.yml b/.rubocop.yml
index fb442ea..60982da 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,2 +1,3 @@
 inherit_from:
+  - .rubocop_todo.yml
   - rubocop.yml
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 0000000..3154fe8
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,35 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2023-02-09 19:54:21 UTC using RuboCop version 1.22.3.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+# Configuration parameters: IgnoreLiteralBranches, IgnoreConstantBranches.
+Lint/DuplicateBranch:
+  Exclude:
+    - 'lib/voxpupuli/test/facts.rb'
+
+# Offense count: 1
+# Configuration parameters: AllowComments.
+Lint/EmptyFile:
+  Exclude:
+    - 'lib/voxpupuli/test.rb'
+
+# Offense count: 6
+# Configuration parameters: .
+# SupportedStyles: have_received, receive
+RSpec/MessageSpies:
+  EnforcedStyle: receive
+
+# Offense count: 1
+RSpec/MultipleDescribes:
+  Exclude:
+    - 'spec/facts_spec.rb'
+
+# Offense count: 1
+Style/MixinUsage:
+  Exclude:
+    - 'lib/voxpupuli/test/facts.rb'
diff --git a/lib/voxpupuli/test/facts.rb b/lib/voxpupuli/test/facts.rb
index 4c5bd92..480651c 100644
--- a/lib/voxpupuli/test/facts.rb
+++ b/lib/voxpupuli/test/facts.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rspec-puppet-facts'
 include RspecPuppetFacts
 
@@ -51,7 +53,7 @@ def add_facts_for_metadata(metadata)
   metadata['dependencies'].each do |dependency|
     case normalize_module_name(dependency['name'])
     when 'camptocamp/systemd', 'puppet/systemd'
-      add_custom_fact :systemd, ->(os, facts) { facts['service_provider'] == 'systemd' }
+      add_custom_fact :systemd, ->(_os, facts) { facts['service_provider'] == 'systemd' }
     when 'puppetlabs/stdlib'
       add_stdlib_facts
     end
@@ -60,6 +62,7 @@ def add_facts_for_metadata(metadata)
 
 def normalize_module_name(name)
   return unless name
+
   name.sub('-', '/')
 end
 
@@ -70,7 +73,7 @@ def add_stdlib_facts
 
   # Rough conversion of grepping in the puppet source:
   # grep defaultfor lib/puppet/provider/service/*.rb
-  add_custom_fact :service_provider, ->(os, facts) do
+  add_custom_fact :service_provider, lambda { |_os, facts|
     case facts[:osfamily].downcase
     when 'archlinux'
       'systemd'
@@ -93,5 +96,5 @@ def add_stdlib_facts
     else
       'init'
     end
-  end
+  }
 end
diff --git a/lib/voxpupuli/test/rake.rb b/lib/voxpupuli/test/rake.rb
index fd2c101..d671bed 100644
--- a/lib/voxpupuli/test/rake.rb
+++ b/lib/voxpupuli/test/rake.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'puppetlabs_spec_helper/rake_tasks'
 
 PuppetLint.configuration.log_format = '%{path}:%{line}:%{check}:%{KIND}:%{message}'
@@ -14,6 +16,7 @@
   task :trailing_whitespace do
     Dir.glob('**/*.md', File::FNM_DOTMATCH).sort.each do |filename|
       next if filename =~ %r{^((modules|acceptance|\.?vendor|spec/fixtures|pkg)/|REFERENCE.md)}
+
       File.foreach(filename).each_with_index do |line, index|
         if line =~ %r{\s\n$}
           puts "#{filename} has trailing whitespace on line #{index + 1}"
diff --git a/lib/voxpupuli/test/spec_helper.rb b/lib/voxpupuli/test/spec_helper.rb
index 6022b13..2e7d3ff 100644
--- a/lib/voxpupuli/test/spec_helper.rb
+++ b/lib/voxpupuli/test/spec_helper.rb
@@ -1,10 +1,10 @@
+# frozen_string_literal: true
+
 RSpec.configure do |config|
   # puppetlabs_spec_helper defaults to mocha but emits a deprecation warning
   # Vox Pupuli prefers rspec to avoid the deprecation warning unless explicitly
   # set
-  if config.instance_variable_get(:@mock_framework).nil?
-    config.mock_with :rspec
-  end
+  config.mock_with :rspec if config.instance_variable_get(:@mock_framework).nil?
 end
 
 require 'voxpupuli/test/facts'
diff --git a/spec/facts_spec.rb b/spec/facts_spec.rb
index 2bb230e..6607d2b 100644
--- a/spec/facts_spec.rb
+++ b/spec/facts_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 require 'voxpupuli/test/facts'
 
@@ -10,9 +12,9 @@
         'release' => {
           'full' => '7.7.1908',
           'major' => '7',
-          'minor' => '7'
+          'minor' => '7',
         },
-      }
+      },
     }
   end
 
@@ -25,9 +27,9 @@
           'release' => {
             'full' => '7.7.1908',
             'major' => '7',
-            'minor' => '7'
+            'minor' => '7',
           },
-        }
+        },
       }
     end
 
@@ -43,16 +45,16 @@
           'release' => {
             'full' => '7.7.1908',
             'major' => '7',
-            'minor' => '7'
+            'minor' => '7',
           },
         },
         ruby: {
           'sitedir' => '/usr/local/share/ruby/site_ruby',
-        }
+        },
       }
     end
 
-    it { expect(override_facts(base_facts, ruby: {sitedir: '/usr/local/share/ruby/site_ruby'})).to eq(expected) }
+    it { expect(override_facts(base_facts, ruby: { sitedir: '/usr/local/share/ruby/site_ruby' })).to eq(expected) }
   end
 
   describe 'with deep merging' do
@@ -64,13 +66,13 @@
           'release' => {
             'full' => '7.7.1908',
             'major' => '7',
-            'minor' => '8'
+            'minor' => '8',
           },
-        }
+        },
       }
     end
 
-    it { expect(override_facts(base_facts, os: {release: {minor: '8'}})).to eq(expected) }
+    it { expect(override_facts(base_facts, os: { release: { minor: '8' } })).to eq(expected) }
   end
 
   describe 'with strings' do
@@ -82,19 +84,20 @@
           'release' => {
             'full' => '7.7.1908',
             'major' => '7',
-            'minor' => '8'
+            'minor' => '8',
           },
-        }
+        },
       }
     end
 
-    it { expect(override_facts(base_facts, os: {'release' => {minor: '8'}})).to eq(expected) }
+    it { expect(override_facts(base_facts, os: { 'release' => { minor: '8' } })).to eq(expected) }
   end
 end
 
 describe 'add_facts_for_metadata' do
-  before(:each) { RspecPuppetFacts.reset }
-  after(:each) { RspecPuppetFacts.reset }
+  before { RspecPuppetFacts.reset }
+
+  after { RspecPuppetFacts.reset }
 
   let(:metadata) do
     { 'dependencies' => dependencies }
@@ -112,7 +115,7 @@
   context 'with systemd' do
     let(:dependencies) do
       [
-        {'name' => 'puppet/systemd'},
+        { 'name' => 'puppet/systemd' },
       ]
     end
 
@@ -124,26 +127,26 @@
     context 'and stdlib' do
       let(:dependencies) do
         [
-          {'name' => 'puppetlabs/stdlib'},
-          {'name' => 'puppet/systemd'},
+          { 'name' => 'puppetlabs/stdlib' },
+          { 'name' => 'puppet/systemd' },
         ]
       end
 
       it 'has systemd on Red Hat 7' do
         add_facts_for_metadata(metadata)
-        facts = RspecPuppetFacts.with_custom_facts('redhat-7-x86_64', {osfamily: 'RedHat', operatingsystemmajrelease: '7'})
+        facts = RspecPuppetFacts.with_custom_facts('redhat-7-x86_64', { osfamily: 'RedHat', operatingsystemmajrelease: '7' })
         expect(facts['systemd']).to be true
       end
 
       it 'has no systemd on Red Hat 6' do
         add_facts_for_metadata(metadata)
-        facts = RspecPuppetFacts.with_custom_facts('redhat-6-x86_64', {osfamily: 'RedHat', operatingsystemmajrelease: '6'})
+        facts = RspecPuppetFacts.with_custom_facts('redhat-6-x86_64', { osfamily: 'RedHat', operatingsystemmajrelease: '6' })
         expect(facts['systemd']).to be false
       end
 
       it 'has no systemd on openbsd' do
         add_facts_for_metadata(metadata)
-        facts = RspecPuppetFacts.with_custom_facts('openbsd-6.4-x86_64', {osfamily: 'OpenBSD'})
+        facts = RspecPuppetFacts.with_custom_facts('openbsd-6.4-x86_64', { osfamily: 'OpenBSD' })
         expect(facts['systemd']).to be false
       end
     end
@@ -152,7 +155,7 @@
   context 'with stdlib' do
     let(:dependencies) do
       [
-        {'name' => 'puppetlabs/stdlib'},
+        { 'name' => 'puppetlabs/stdlib' },
       ]
     end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 73fb578..36922e5 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 begin
   require 'simplecov'
   require 'simplecov-console'