diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 36d80ac..52cc588 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -20,7 +20,12 @@ jobs:
     strategy:
       matrix:
         rspec-minor-versions: [6, 7, 8, 9, 10, 11, 12, 13]
-        ruby-versions: ["3.1", "3.2", "3.3", "3.4"]
+        ruby-versions: ["3.1", "3.2", "3.3", "3.4", "4.0"]
+        exclude:
+          - ruby-versions: 4.0
+            rspec-minor-versions: 6
+          - ruby-versions: 4.0
+            rspec-minor-versions: 7
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/rspec_3.${{ matrix.rspec-minor-versions }}.gemfile
 
diff --git a/.rubocop.yml b/.rubocop.yml
index eff9a44..09f78a6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -25,6 +25,9 @@ Style/FrozenStringLiteralComment:
 Naming/FileName:
   Exclude:
     - lib/flatware-*.rb
+Naming/PredicateMethod:
+  Exclude:
+    - lib/flatware/sink.rb
 Style/Documentation:
   Enabled: false
 Metrics/BlockLength:
diff --git a/Gemfile b/Gemfile
index aec2f52..2824f9d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gemspec name: 'flatware-cucumber'
 
 group :development do
   gem 'appraisal'
-  gem 'aruba', '~> 0.14'
+  gem 'aruba'
   gem 'logger'
   gem 'ostruct'
   gem 'pry'
diff --git a/Rakefile b/Rakefile
index cbf8929..d82c101 100644
--- a/Rakefile
+++ b/Rakefile
@@ -19,7 +19,7 @@ end
 RuboCop::RakeTask.new :lint
 
 Cucumber::Rake::Task.new :cucumber do |task|
-  task.cucumber_opts = ['--tags', 'not @wip']
+  task.cucumber_opts = ['--tags', 'not @wip', '--publish-quiet']
   task.cucumber_opts += %w[-f progress] unless ENV['TRAVIS']
   task.fork = false
 end
diff --git a/features/step_definitions/flatware_steps.rb b/features/step_definitions/flatware_steps.rb
index 69711f1..5edd39d 100644
--- a/features/step_definitions/flatware_steps.rb
+++ b/features/step_definitions/flatware_steps.rb
@@ -77,7 +77,7 @@ def duration(&block)
   command = ['flatware', args, '-w', max_workers].flatten.compact.join(' ')
 
   @duration = duration do
-    run_command_and_stop(command, fail_on_exit: false)
+    run_command_and_stop(command, fail_on_error: false)
   end
 end
 
@@ -113,7 +113,7 @@ def duration(&block)
 
 Then 'the output contains a backtrace' do
   trace = <<-TXT.gsub(/^ +/, '')
-    features/flunk.feature:4:in `Given flunk'
+    features/flunk.feature:4:in `flunk'
   TXT
 
   expect(flatware_process).to have_output Regexp.new Regexp.escape trace
diff --git a/flatware-cucumber.gemspec b/flatware-cucumber.gemspec
index 47b6694..6f81999 100644
--- a/flatware-cucumber.gemspec
+++ b/flatware-cucumber.gemspec
@@ -20,9 +20,10 @@ Gem::Specification.new do |s|
             )
   s.homepage = 'http://github.com/briandunn/flatware'
   s.licenses = ['MIT']
-  s.required_ruby_version = ['>= 2.6', '< 3.5']
+  s.required_ruby_version = ['>= 2.6', '< 4.1']
   s.require_paths = ['lib']
-  s.add_dependency %(cucumber), '~> 3.0'
+  s.add_dependency %(cucumber), '>= 10.0'
   s.add_dependency %(flatware), Flatware::VERSION
+  s.add_dependency %(ostruct)
   # s.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/flatware-rspec.gemspec b/flatware-rspec.gemspec
index d534c32..db5a2de 100644
--- a/flatware-rspec.gemspec
+++ b/flatware-rspec.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
           )
   s.homepage = 'http://github.com/briandunn/flatware'
   s.licenses = ['MIT']
-  s.required_ruby_version = ['>= 2.6', '< 3.5']
+  s.required_ruby_version = ['>= 2.6', '< 4.1']
   s.require_paths = ['lib']
   s.add_dependency %(flatware), Flatware::VERSION
   s.add_dependency %(rspec), '>= 3.6'
diff --git a/flatware.gemspec b/flatware.gemspec
index 20121be..72eec68 100644
--- a/flatware.gemspec
+++ b/flatware.gemspec
@@ -26,10 +26,12 @@ Gem::Specification.new do |s|
   s.homepage = 'http://github.com/briandunn/flatware'
 
   s.licenses = ['MIT']
-  s.required_ruby_version = ['>= 2.6', '< 3.5']
+  s.required_ruby_version = ['>= 2.6', '< 4.1']
   s.require_paths = ['lib']
   s.executables = ['flatware']
+  s.add_dependency %(benchmark)
   s.add_dependency %(drb)
+  s.add_dependency %(logger)
   s.add_dependency %(thor), '< 2.0'
   # s.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/gemfiles/rspec_3.10.gemfile b/gemfiles/rspec_3.10.gemfile
index 0b27a9e..186cb79 100644
--- a/gemfiles/rspec_3.10.gemfile
+++ b/gemfiles/rspec_3.10.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.10.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.11.gemfile b/gemfiles/rspec_3.11.gemfile
index 05e24b2..9f3c0e0 100644
--- a/gemfiles/rspec_3.11.gemfile
+++ b/gemfiles/rspec_3.11.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.11.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.12.gemfile b/gemfiles/rspec_3.12.gemfile
index 6264d6f..ed81aea 100644
--- a/gemfiles/rspec_3.12.gemfile
+++ b/gemfiles/rspec_3.12.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.12.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.13.gemfile b/gemfiles/rspec_3.13.gemfile
index 9a4a683..e8648d4 100644
--- a/gemfiles/rspec_3.13.gemfile
+++ b/gemfiles/rspec_3.13.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.13.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.6.gemfile b/gemfiles/rspec_3.6.gemfile
index 7283dd8..ea2e2bf 100644
--- a/gemfiles/rspec_3.6.gemfile
+++ b/gemfiles/rspec_3.6.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.6.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.7.gemfile b/gemfiles/rspec_3.7.gemfile
index 9fcc482..411db5e 100644
--- a/gemfiles/rspec_3.7.gemfile
+++ b/gemfiles/rspec_3.7.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.7.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.8.gemfile b/gemfiles/rspec_3.8.gemfile
index a55a9bf..c9f5f97 100644
--- a/gemfiles/rspec_3.8.gemfile
+++ b/gemfiles/rspec_3.8.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.8.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/gemfiles/rspec_3.9.gemfile b/gemfiles/rspec_3.9.gemfile
index 559951b..d60226a 100644
--- a/gemfiles/rspec_3.9.gemfile
+++ b/gemfiles/rspec_3.9.gemfile
@@ -6,7 +6,7 @@ gem "rspec", "3.9.0"
 
 group :development do
   gem "appraisal"
-  gem "aruba", "~> 0.14"
+  gem "aruba"
   gem "pry"
   gem "racc"
   gem "rake"
diff --git a/lib/flatware/cucumber.rb b/lib/flatware/cucumber.rb
index e821905..18c800b 100644
--- a/lib/flatware/cucumber.rb
+++ b/lib/flatware/cucumber.rb
@@ -35,12 +35,23 @@ def feature_files
     def configure(args, out_stream = $stdout, error_stream = $stderr)
       raw_args = args.dup
       cli_config = ::Cucumber::Cli::Configuration.new(out_stream, error_stream)
-      cli_config.parse! args + %w[--format Flatware::Cucumber::Formatter]
+      cli_config.parse! args + %w[--format Flatware::Cucumber::Formatter --publish-quiet]
       cucumber_config = ::Cucumber::Configuration.new cli_config
       Config.new cucumber_config, raw_args
     end
 
     def run(feature_files, options)
+      # TODO: This will eventually stop working.  This ensures step definitions are evaluated on each execution
+      # by using `load` instead of once per Ruby runtime using `require`.
+      #
+      # If we use the same runtime object and reconfigure it on each execution here, the wrong feature files will
+      # be evaluated since their memoized.  Unfortunately, this means there's no straightforward way to both ensure
+      # step definitions are available on every runtime *and* also ensure Cucumber isn't memoizing the feature files
+      # to run.
+      #
+      # For now, the legacy autoloader is the only option to keep everything working properly.
+      ::Cucumber.use_legacy_autoloader ||= true
+
       runtime(Array(feature_files) + options).run!
     end
 
diff --git a/lib/flatware/cucumber/formatters/console/summary.rb b/lib/flatware/cucumber/formatters/console/summary.rb
index 57ea023..bc5c571 100644
--- a/lib/flatware/cucumber/formatters/console/summary.rb
+++ b/lib/flatware/cucumber/formatters/console/summary.rb
@@ -7,6 +7,7 @@ module Formatters
       class Console
         class Summary
           include ::Cucumber::Formatter::Console
+
           attr_reader :io, :steps, :scenarios
 
           def initialize(steps, scenarios = [], io = StringIO.new)
diff --git a/lib/flatware/pid.rb b/lib/flatware/pid.rb
index 7914963..d478380 100644
--- a/lib/flatware/pid.rb
+++ b/lib/flatware/pid.rb
@@ -27,9 +27,9 @@ def self.ps
         .popen(['ps', *args])
         .readlines
         .map do |row|
-        fields = row.strip.split(/\s+/, 4)
-        new(*fields.take(3).map(&:to_i), fields.last)
-      end
+          fields = row.strip.split(/\s+/, 4)
+          new(*fields.take(3).map(&:to_i), fields.last)
+        end
     end
 
     def pids_of_group(group_pid)
diff --git a/lib/flatware/rspec/formatters/console.rb b/lib/flatware/rspec/formatters/console.rb
index 5429a77..154b587 100644
--- a/lib/flatware/rspec/formatters/console.rb
+++ b/lib/flatware/rspec/formatters/console.rb
@@ -63,12 +63,12 @@ def spec_list(remaining)
           remaining
             .flat_map(&:id).sort.each_with_index
             .map do |example, index|
-            format(
-              '%<index>4d) %<example>s',
-              index: index.next,
-              example: example
-            )
-          end.join("\n")
+              format(
+                '%<index>4d) %<example>s',
+                index: index.next,
+                example: example
+              )
+            end.join("\n")
         end
 
         def colorizer
diff --git a/lib/flatware/rspec/job_builder.rb b/lib/flatware/rspec/job_builder.rb
index 2691aef..5d3c110 100644
--- a/lib/flatware/rspec/job_builder.rb
+++ b/lib/flatware/rspec/job_builder.rb
@@ -9,6 +9,7 @@ module RSpec
     # and attempts to ballence the jobs accordingly.
     class JobBuilder
       extend Forwardable
+
       attr_reader :args, :workers, :configuration
 
       def_delegators(
@@ -54,12 +55,12 @@ def timed_and_untimed_files(seconds_per_file)
         files_to_run
           .map(&method(:normalize_path))
           .reduce([[], []]) do |(timed, untimed), file|
-          if (time = seconds_per_file[file])
-            [timed + [[file, time]], untimed]
-          else
-            [timed, untimed + [file]]
+            if (time = seconds_per_file[file])
+              [timed + [[file, time]], untimed]
+            else
+              [timed, untimed + [file]]
+            end
           end
-        end
       end
 
       def normalize_path(path)
@@ -73,14 +74,15 @@ def load_persisted_example_statuses
       end
 
       def sum_seconds(statuses)
-        statuses.select(&passing)
-                .map { |example| parse_example(**example) }
-                .reduce({}) do |times, example|
-          times.merge(
-            example.fetch(:file_name) => example.fetch(:seconds)
-          ) do |_, old = 0, new|
-            old + new
-          end
+        statuses
+          .select(&passing)
+          .map { |example| parse_example(**example) }
+          .reduce({}) do |times, example|
+            times.merge(
+              example.fetch(:file_name) => example.fetch(:seconds)
+            ) do |_, old = 0, new|
+              old + new
+            end
         end
       end
 
@@ -109,10 +111,10 @@ def balance_by(count, items, &block)
             .sort_by(&block)
             .reverse
             .each do |entry|
-            groups.min_by do |group|
-              group.map(&block).reduce(:+) || 0
-            end.push(entry)
-          end
+              groups.min_by do |group|
+                group.map(&block).reduce(:+) || 0
+              end.push(entry)
+            end
         end
       end
     end
diff --git a/lib/flatware/sink.rb b/lib/flatware/sink.rb
index 2788487..2227ac8 100644
--- a/lib/flatware/sink.rb
+++ b/lib/flatware/sink.rb
@@ -117,8 +117,8 @@ def group_jobs(jobs, worker_count)
           .with_index { |_, i| i % worker_count }
           .values
           .map do |job_group|
-          Job.new(job_group.map(&:id).flatten, jobs.first.args)
-        end
+            Job.new(job_group.map(&:id).flatten, jobs.first.args)
+          end
       end
     end
   end
diff --git a/spec/flatware/sink/signal_spec.rb b/spec/flatware/sink/signal_spec.rb
index bc62baa..2d8e21d 100644
--- a/spec/flatware/sink/signal_spec.rb
+++ b/spec/flatware/sink/signal_spec.rb
@@ -53,7 +53,7 @@ def send_signal(signal)
     end
 
     it 'tells the formatter to emit the signal message' do
-      expect(messages).to match([include(expected_message), 'done.'])
+      expect(messages).to match([match(expected_message), 'done.'])
     end
 
     it 'calls on_interrupt' do