diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 64bb73a7..d63065b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,11 +12,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby_version: ['2.5', '2.6', '2.7', '3.0', '3.1']
+        ruby_version: ['2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '4.0']
         gemfile:
-          - test/gemfiles/rails_5_0.gemfile
-          - test/gemfiles/rails_5_1.gemfile
-          - test/gemfiles/rails_5_2.gemfile
           - test/gemfiles/rails_6_0.gemfile
           - test/gemfiles/rails_6_1.gemfile
           - test/gemfiles/rails_7_0_sassc.gemfile
@@ -26,36 +23,34 @@ jobs:
             gemfile: test/gemfiles/rails_4_2.gemfile
           - ruby_version: '2.6'
             gemfile: test/gemfiles/rails_4_2.gemfile
-        exclude:
           - ruby_version: '2.5'
-            gemfile: test/gemfiles/rails_7_0_sassc.gemfile
-          - ruby_version: '2.5'
-            gemfile: test/gemfiles/rails_7_0_dartsass.gemfile
-          - ruby_version: '2.6'
-            gemfile: test/gemfiles/rails_7_0_sassc.gemfile
+            gemfile: test/gemfiles/rails_5_0.gemfile
           - ruby_version: '2.6'
-            gemfile: test/gemfiles/rails_7_0_dartsass.gemfile
-          - ruby_version: '3.0'
             gemfile: test/gemfiles/rails_5_0.gemfile
-          - ruby_version: '3.0'
-            gemfile: test/gemfiles/rails_5_1.gemfile
-          - ruby_version: '3.0'
-            gemfile: test/gemfiles/rails_5_2.gemfile
-          - ruby_version: '3.1'
+          - ruby_version: '2.7'
             gemfile: test/gemfiles/rails_5_0.gemfile
-          - ruby_version: '3.1'
+          - ruby_version: '2.5'
             gemfile: test/gemfiles/rails_5_1.gemfile
-          - ruby_version: '3.1'
+          - ruby_version: '2.6'
+            gemfile: test/gemfiles/rails_5_1.gemfile
+          - ruby_version: '2.7'
+            gemfile: test/gemfiles/rails_5_1.gemfile
+          - ruby_version: '2.5'
+            gemfile: test/gemfiles/rails_5_2.gemfile
+          - ruby_version: '2.6'
+            gemfile: test/gemfiles/rails_5_2.gemfile
+          - ruby_version: '2.7'
             gemfile: test/gemfiles/rails_5_2.gemfile
-          - ruby_version: '3.1'
-            gemfile: test/gemfiles/rails_6_0.gemfile
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby_version }}
           bundler-cache: true # 'bundle install' and cache
+      - name: Disable AppArmor # https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md
+        if: runner.os == 'Linux'
+        run: sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
       - name: Build and test with Rake
         run: bundle exec rake --trace
diff --git a/bootstrap.gemspec b/bootstrap.gemspec
index a0bd50c4..b47a63bc 100644
--- a/bootstrap.gemspec
+++ b/bootstrap.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake'
 
   # Testing dependencies
-  s.add_development_dependency 'minitest', '~> 5.14.4'
+  s.add_development_dependency 'minitest', '>= 5.14.4', '< 7'
   s.add_development_dependency 'minitest-reporters', '~> 1.4.3'
   s.add_development_dependency 'term-ansicolor'
   # Integration testing
diff --git a/test/gemfiles/rails_6_0.gemfile b/test/gemfiles/rails_6_0.gemfile
index daeffa5f..db3f394a 100644
--- a/test/gemfiles/rails_6_0.gemfile
+++ b/test/gemfiles/rails_6_0.gemfile
@@ -5,3 +5,11 @@ gem 'activesupport', '~> 6.0.3'
 gem 'sassc-rails', '~> 2.0'
 
 gemspec path: '../../'
+
+# no longer bundled as default gems in newer ruby
+gem 'base64'
+gem 'benchmark'
+gem 'drb'
+gem 'mutex_m'
+gem 'ruby2_keywords'
+gem 'tsort'
diff --git a/test/gemfiles/rails_6_1.gemfile b/test/gemfiles/rails_6_1.gemfile
index 04342fbb..358eae29 100644
--- a/test/gemfiles/rails_6_1.gemfile
+++ b/test/gemfiles/rails_6_1.gemfile
@@ -5,3 +5,11 @@ gem 'activesupport', '~> 6.1.3'
 gem 'sassc-rails', '~> 2.0'
 
 gemspec path: '../../'
+
+# no longer bundled as default gems in newer ruby
+gem 'base64'
+gem 'benchmark'
+gem 'drb'
+gem 'mutex_m'
+gem 'ruby2_keywords'
+gem 'tsort'
diff --git a/test/gemfiles/rails_7_0_dartsass.gemfile b/test/gemfiles/rails_7_0_dartsass.gemfile
index 6df9142d..7e46b9d9 100644
--- a/test/gemfiles/rails_7_0_dartsass.gemfile
+++ b/test/gemfiles/rails_7_0_dartsass.gemfile
@@ -5,3 +5,11 @@ gem 'activesupport', '~> 7.0.4'
 gem 'dartsass-sprockets', '~> 3.0'
 
 gemspec path: '../../'
+
+# no longer bundled as default gems in newer ruby
+gem 'base64'
+gem 'benchmark'
+gem 'drb'
+gem 'mutex_m'
+gem 'ruby2_keywords'
+gem 'tsort'
diff --git a/test/gemfiles/rails_7_0_sassc.gemfile b/test/gemfiles/rails_7_0_sassc.gemfile
index 58fc0395..e5fe36e6 100644
--- a/test/gemfiles/rails_7_0_sassc.gemfile
+++ b/test/gemfiles/rails_7_0_sassc.gemfile
@@ -5,3 +5,11 @@ gem 'activesupport', '~> 7.0.4'
 gem 'sassc-rails', '~> 2.0'
 
 gemspec path: '../../'
+
+# no longer bundled as default gems in newer ruby
+gem 'base64'
+gem 'benchmark'
+gem 'drb'
+gem 'mutex_m'
+gem 'ruby2_keywords'
+gem 'tsort'
diff --git a/test/test_helper.rb b/test/test_helper.rb
index da896902..5b182425 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,3 +1,5 @@
+require 'logger'
+
 require 'minitest/autorun'
 require 'minitest/reporters'
 Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new
@@ -26,7 +28,7 @@
   options = {
       window_size: [1280, 1024],
       timeout: 30,
-      process_timeout: 30
+      process_timeout: 60
   }
   options[:browser_path] = browser_path if browser_path
   Capybara::Cuprite::Driver.new(app, options)
@@ -34,9 +36,9 @@
 
 Capybara.configure do |config|
   config.server = :webrick
-  config.app_host = 'http://localhost:7000'
+  config.app_host = 'http://localhost:8000'
   config.default_driver = :cuprite
   config.javascript_driver = :cuprite
-  config.server_port = 7000
+  config.server_port = 8000
   config.default_max_wait_time = 10
 end