diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f07d8109..1b6411e05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 Please visit [cucumber/CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CONTRIBUTING.md) for more info on how to contribute to Cucumber.
 
 ## [Unreleased]
+### Added
+- Add timestamp to `Attachment` message
 
 ## [10.2.0] - 2025-12-10
 ### Changed
diff --git a/compatibility/cck_spec.rb b/compatibility/cck_spec.rb
index d904dbf3f..efb938d7f 100644
--- a/compatibility/cck_spec.rb
+++ b/compatibility/cck_spec.rb
@@ -3,7 +3,7 @@
 require_relative 'support/shared_examples'
 require_relative 'support/cck/examples'
 
-require 'cck/examples'
+require 'cucumber/compatibility_kit'
 
 # This is the implementation of the CCK testing for cucumber-ruby
 # It will run each example from the CCK that is of type "gherkin" (As "markdown" examples aren't implemented in ruby)
@@ -13,13 +13,19 @@
 describe CCK, :cck do
   let(:cucumber_command) { 'bundle exec cucumber --publish-quiet --profile none --format message' }
 
-  CCK::Examples.gherkin.each do |example_name|
+  ['retry', 'ambiguous'].each do |example_name|
     describe "'#{example_name}' example" do
       include_examples 'cucumber compatibility kit' do
         let(:example) { example_name }
-        let(:extra_args) { example == 'retry' ? '--retry 2' : '' }
+        let(:extra_args) do
+          if File.exist?("#{cck_path}/#{example}.arguments.txt")
+            File.read("#{cck_path}/#{example}.arguments.txt").to_s
+          else
+            ''
+          end
+        end
         let(:support_code_path) { CCK::Examples.supporting_code_for(example) }
-        let(:messages) { `#{cucumber_command} #{extra_args} --require #{support_code_path} #{cck_path}` }
+        let(:messages) { `#{cucumber_command} --require #{support_code_path} #{cck_path} #{extra_args}` }
       end
     end
   end
diff --git a/compatibility/features/ambiguous/ambiguous_steps.rb b/compatibility/features/ambiguous/ambiguous_steps.rb
new file mode 100644
index 000000000..21161e30d
--- /dev/null
+++ b/compatibility/features/ambiguous/ambiguous_steps.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+Given(/^a (.*?) with (.*?)$/) do |_arg1, _arg2|
+  # no-op
+end
+
+Given(/^a step with (.*)$/) do |_arg1|
+  # no-op
+end
diff --git a/compatibility/features/doc-strings/doc-strings_steps.rb b/compatibility/features/doc-strings/doc-strings_steps.rb
new file mode 100644
index 000000000..a374b1c40
--- /dev/null
+++ b/compatibility/features/doc-strings/doc-strings_steps.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Given('a doc string:') do |doc_string|
+  # no-op
+end
diff --git a/compatibility/features/global-hooks-afterall-error/global-hooks-afterall-error_steps.rb b/compatibility/features/global-hooks-afterall-error/global-hooks-afterall-error_steps.rb
new file mode 100644
index 000000000..d72047878
--- /dev/null
+++ b/compatibility/features/global-hooks-afterall-error/global-hooks-afterall-error_steps.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+BeforeAll do
+  # no-op
+end
+
+BeforeAll do
+  raise 'BeforeAll hook went wrong'
+end
+
+BeforeAll do
+  # no-op
+end
+
+When('a step passes') do
+  # no-op
+end
+
+AfterAll do
+  # no-op
+end
+
+AfterAll do
+  # no-op
+end
diff --git a/compatibility/features/global-hooks-attachments/global-hooks-attachments_steps.rb b/compatibility/features/global-hooks-attachments/global-hooks-attachments_steps.rb
new file mode 100644
index 000000000..b2c272529
--- /dev/null
+++ b/compatibility/features/global-hooks-attachments/global-hooks-attachments_steps.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+BeforeAll do
+  attach('Attachment from BeforeAll hook', 'text/plain')
+end
+
+When('a step passes') do
+  # no-op
+end
+
+AfterAll do
+  attach('Attachment from AfterAll hook', 'text/plain')
+end
diff --git a/compatibility/features/global-hooks-beforeall-error/global-hooks-beforeall-error_steps.rb b/compatibility/features/global-hooks-beforeall-error/global-hooks-beforeall-error_steps.rb
new file mode 100644
index 000000000..bca4571e4
--- /dev/null
+++ b/compatibility/features/global-hooks-beforeall-error/global-hooks-beforeall-error_steps.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+BeforeAll do
+  # no-op
+end
+
+BeforeAll do
+  # no-op
+end
+
+When('a step passes') do
+  # no-op
+end
+
+AfterAll do
+  # no-op
+end
+
+AfterAll do
+  raise 'AfterAll hook went wrong'
+end
+
+AfterAll do
+  # no-op
+end
diff --git a/compatibility/features/global-hooks/global-hooks_steps.rb b/compatibility/features/global-hooks/global-hooks_steps.rb
new file mode 100644
index 000000000..993bc62c5
--- /dev/null
+++ b/compatibility/features/global-hooks/global-hooks_steps.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+BeforeAll do
+  # no-op
+end
+
+BeforeAll do
+  # no-op
+end
+
+When('a step passes') do
+  # no-op
+end
+
+When('a step fails') do
+  raise 'Exception in step'
+end
+
+AfterAll do
+  # no-op
+end
+
+AfterAll do
+  # no-op
+end
diff --git a/compatibility/features/multiple-features-reversed/multiple-features-reversed_steps.rb b/compatibility/features/multiple-features-reversed/multiple-features-reversed_steps.rb
new file mode 100644
index 000000000..cd8682ffe
--- /dev/null
+++ b/compatibility/features/multiple-features-reversed/multiple-features-reversed_steps.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Given('an order for {string}') do |_item|
+  # no-op
+end
diff --git a/compatibility/features/multiple-features/multiple-features_steps.rb b/compatibility/features/multiple-features/multiple-features_steps.rb
new file mode 100644
index 000000000..cd8682ffe
--- /dev/null
+++ b/compatibility/features/multiple-features/multiple-features_steps.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Given('an order for {string}') do |_item|
+  # no-op
+end
diff --git a/compatibility/features/regular-expression/regular-expression_steps.rb b/compatibility/features/regular-expression/regular-expression_steps.rb
new file mode 100644
index 000000000..246e6e3e0
--- /dev/null
+++ b/compatibility/features/regular-expression/regular-expression_steps.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Given(/^a (.*?)(?: and a (.*?))?(?: and a (.*?))?$/) do |_vegetable1, _vegetable2, _vegetable3|
+  # no-op
+end
diff --git a/compatibility/features/retry/retry_steps.rb b/compatibility/features/retry/retry_steps.rb
index c31a0aa63..d042e9304 100644
--- a/compatibility/features/retry/retry_steps.rb
+++ b/compatibility/features/retry/retry_steps.rb
@@ -19,3 +19,15 @@
 Given('a step that always fails') do
   raise 'Exception in step'
 end
+
+Given('an ambiguous step') do
+  # first one
+end
+
+Given('an ambiguous step') do
+  # second one
+end
+
+Given('a pending step') do
+  pending('')
+end
diff --git a/compatibility/features/rules-backgrounds/rules-backgrounds_steps.rb b/compatibility/features/rules-backgrounds/rules-backgrounds_steps.rb
new file mode 100644
index 000000000..3b5187169
--- /dev/null
+++ b/compatibility/features/rules-backgrounds/rules-backgrounds_steps.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+Given('an order for {string}') do |_item|
+  # no-op
+end
+
+When('an action') do
+  # no-op
+end
+
+Then('an outcome') do
+  # no-op
+end
diff --git a/compatibility/features/unused-steps/unused-steps_steps.rb b/compatibility/features/unused-steps/unused-steps_steps.rb
new file mode 100644
index 000000000..f06fdfa5f
--- /dev/null
+++ b/compatibility/features/unused-steps/unused-steps_steps.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+Given('a step that is used') do
+  # no-op
+end
+
+Given('a step that is not used') do
+  # no-op
+end
diff --git a/compatibility/support/shared_examples.rb b/compatibility/support/shared_examples.rb
index a9ebf8a99..6f2674dbe 100644
--- a/compatibility/support/shared_examples.rb
+++ b/compatibility/support/shared_examples.rb
@@ -10,7 +10,7 @@
 RSpec.shared_examples 'cucumber compatibility kit' do
   include CCK::Helpers
 
-  let(:cck_path) { CCK::Examples.feature_code_for(example) }
+  let(:cck_path) { CompatibilityKit.feature_code_for(example) }
 
   let(:parsed_original) { parse_ndjson_file("#{cck_path}/#{example}.ndjson") }
   let(:parsed_generated) { parse_ndjson(messages) }
diff --git a/cucumber.gemspec b/cucumber.gemspec
index 8162a1dfb..bbf926516 100644
--- a/cucumber.gemspec
+++ b/cucumber.gemspec
@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'multi_test', '~> 1.1'
   s.add_dependency 'sys-uname', '~> 1.3'
 
-  s.add_development_dependency 'cucumber-compatibility-kit', '~> 20.0'
+  s.add_development_dependency 'cucumber-compatibility-kit', '~> 22.0'
   # Only needed whilst we are testing the formatters. Can be removed once we remove tests for those
   s.add_development_dependency 'nokogiri', '~> 1.15'
   s.add_development_dependency 'rake', '~> 13.2'