diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c1e19aba..861be1de 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,12 +8,7 @@ on:
 
 jobs:
   test:
-    name: "rspec (ruby:${{ matrix.ruby }}"
-
-    strategy:
-      fail-fast: false
-      matrix:
-        ruby: [ "3.0", "3.1", "3.2" ]
+    name: "rspec (ruby:${{ matrix.ruby }})"
 
     runs-on: ubuntu-latest
 
@@ -28,6 +23,11 @@ jobs:
           --health-timeout 5s
           --health-retries 5
 
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: [ ruby-3.0, ruby-3.1, ruby-3.2 ]
+
     steps:
       - uses: actions/checkout@v4
 
@@ -36,10 +36,14 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
 
-      - name: RSpec
-        run: scripts/ci-rspec
+      - run: bundle exec rake test
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
-  rubocop:
+  lint:
     runs-on: ubuntu-latest
 
     steps:
@@ -47,7 +51,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.2"
+          ruby-version: ruby-3.2
           bundler-cache: true
 
-      - run: bundle exec rubocop
+      - run: bundle exec rake lint
diff --git a/.rspec b/.rspec
index d3ec40e0..283edea7 100644
--- a/.rspec
+++ b/.rspec
@@ -1,5 +1,2 @@
---backtrace
---color
---format=documentation
---order random
+--require simplecov
 --require spec_helper
diff --git a/.simplecov b/.simplecov
new file mode 100644
index 00000000..193cb89e
--- /dev/null
+++ b/.simplecov
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+SimpleCov.start do
+  gemfile = File.basename(ENV.fetch("BUNDLE_GEMFILE", "Gemfile"), ".gemfile").strip
+  gemfile = nil if gemfile.empty? || gemfile.casecmp?("gems.rb") || gemfile.casecmp?("Gemfile")
+
+  command_name ["#{RUBY_ENGINE}-#{RUBY_ENGINE_VERSION}", gemfile].compact.join("/")
+
+  enable_coverage :branch
+
+  if ENV["CI"]
+    require "simplecov-cobertura"
+    formatter SimpleCov::Formatter::CoberturaFormatter
+  else
+    formatter SimpleCov::Formatter::MultiFormatter.new([
+      SimpleCov::Formatter::SimpleFormatter,
+      SimpleCov::Formatter::HTMLFormatter
+    ])
+  end
+
+  add_filter "/demo/"
+  add_filter "/gemfiles/"
+  add_filter "/spec/"
+  add_filter "/vendor/"
+end
diff --git a/Gemfile b/Gemfile
index 0589cf19..36d44f05 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,10 @@ group :test do
   gem "rack-test"
 
   gem "rspec"
+
   gem "simplecov"
+  gem "simplecov-cobertura"
+
   gem "timecop"
 
   gem "rubocop",              require: false
diff --git a/Rakefile b/Rakefile
index ba007163..f8aa96de 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,9 +1,30 @@
 # frozen_string_literal: true
 
-require "appraisal"
 require "bundler/gem_tasks"
 
-require "rspec/core/rake_task"
-RSpec::Core::RakeTask.new
+desc "Run tests"
+task :test do
+  rm_rf "coverage"
+  rm_rf "gemfiles"
 
-task default: ENV["APPRAISAL_INITIALIZED"] ? %i[spec] : %i[appraisal rubocop]
+  Bundler.with_unbundled_env do
+    sh "bundle exec appraisal generate"
+
+    # XXX: `bundle exec appraisal install` fails on ruby-3.2
+    Dir["gemfiles/*.gemfile"].each do |gemfile|
+      sh({ "BUNDLE_GEMFILE" => gemfile }, "bundle lock")
+      sh({ "BUNDLE_GEMFILE" => gemfile }, "bundle check") do |ok|
+        sh({ "BUNDLE_GEMFILE" => gemfile }, "bundle install") unless ok
+      end
+    end
+
+    sh "bundle exec appraisal rspec --force-colour"
+  end
+end
+
+desc "Lint codebase"
+task :lint do
+  sh "bundle exec rubocop --color"
+end
+
+task default: %i[test lint]
diff --git a/scripts/ci-rspec b/scripts/ci-rspec
deleted file mode 100755
index 1aedbca0..00000000
--- a/scripts/ci-rspec
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/usr/bin/env bash
-
-set -Eeuxo pipefail
-
-rm -f ./Gemfile.lock
-bundle install
-
-rm -f ./gemfiles/*.gemfile ./gemfiles/*.gemfile.lock
-bundle exec appraisal generate
-
-# XXX: `bundle exec appraisal install` fails on CI with ruby-3.2
-for BUNDLE_GEMFILE in gemfiles/*.gemfile; do
-  export BUNDLE_GEMFILE
-  bundle check || bundle install
-done
-
-bundle exec appraisal rspec
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 80c1093f..cb34b713 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require_relative "support/simplecov" if ENV["CI"] || ENV["COVERAGE"]
 require_relative "support/sidekiq"
 require_relative "support/timecop"
 
diff --git a/spec/support/simplecov.rb b/spec/support/simplecov.rb
deleted file mode 100644
index ca4f6f67..00000000
--- a/spec/support/simplecov.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-require "simplecov"
-
-SimpleCov.start do
-  command_name "BUNDLE_GEMFILE=#{ENV.fetch('BUNDLE_GEMFILE')}"
-
-  enable_coverage :branch
-
-  add_filter "/gemfiles/"
-  add_filter "/spec/"
-  add_filter "/vendor/"
-end