diff --git a/.github/actions/test_ruby_gem_uploads/Gemfile b/.github/actions/test_ruby_gem_uploads/Gemfile
index 027aa6dc..16522d0e 100644
--- a/.github/actions/test_ruby_gem_uploads/Gemfile
+++ b/.github/actions/test_ruby_gem_uploads/Gemfile
@@ -3,6 +3,7 @@
 source 'https://rubygems.org'
 
 gem 'rspec'
+gem 'coderay'
 gem 'knapsack_pro'
 gem 'rake'
 gem 'rake-compiler'
diff --git a/.github/actions/test_ruby_gem_uploads/Gemfile.lock b/.github/actions/test_ruby_gem_uploads/Gemfile.lock
new file mode 100644
index 00000000..e33dc946
--- /dev/null
+++ b/.github/actions/test_ruby_gem_uploads/Gemfile.lock
@@ -0,0 +1,52 @@
+PATH
+  remote: ../../../rspec-trunk-flaky-tests
+  specs:
+    rspec_trunk_flaky_tests (0.0.0)
+      rb_sys (= 0.9.124)
+      rspec-core (> 3.3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    coderay (1.1.3)
+    diff-lcs (1.6.2)
+    knapsack_pro (10.0.0)
+      rake
+      thor (~> 1.4)
+    logger (1.7.0)
+    rake (13.4.2)
+    rake-compiler (1.3.1)
+      rake
+    rake-compiler-dock (1.11.0)
+    rb_sys (0.9.124)
+      rake-compiler-dock (= 1.11.0)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.8)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.7)
+    thor (1.5.0)
+
+PLATFORMS
+  ruby
+  x86_64-linux
+
+DEPENDENCIES
+  coderay
+  knapsack_pro
+  logger
+  rake
+  rake-compiler
+  rspec
+  rspec_trunk_flaky_tests!
+
+BUNDLED WITH
+   2.5.23
diff --git a/.github/actions/test_ruby_gem_uploads/spec/test_spec.rb b/.github/actions/test_ruby_gem_uploads/spec/test_spec.rb
index 529018e3..020fe192 100644
--- a/.github/actions/test_ruby_gem_uploads/spec/test_spec.rb
+++ b/.github/actions/test_ruby_gem_uploads/spec/test_spec.rb
@@ -5,6 +5,14 @@ def square(val)
 end
 
 describe 'simple_test' do
+  around do |example|
+    original_color_mode = RSpec.configuration.color_mode
+    RSpec.configuration.color_mode = :on
+    example.run
+  ensure
+    RSpec.configuration.color_mode = original_color_mode
+  end
+
   [1, 2, 3].each do |i|
     it do
       expect(square(i)).to eq(i * i)
diff --git a/rspec-trunk-flaky-tests/lib/trunk_spec_helper.rb b/rspec-trunk-flaky-tests/lib/trunk_spec_helper.rb
index 896ee845..3f8d0573 100644
--- a/rspec-trunk-flaky-tests/lib/trunk_spec_helper.rb
+++ b/rspec-trunk-flaky-tests/lib/trunk_spec_helper.rb
@@ -54,10 +54,16 @@ def yellow
   end
 end
 
+ANSI_ESCAPE_PATTERN = %r{(?:\e[@-Z\\-_]|\e\[[0-?]*[ -/]*[@-~])}
+
 def escape(str)
   str.dump[1..-2]
 end
 
+def strip_ansi_codes(text)
+  text.to_s.gsub(ANSI_ESCAPE_PATTERN, '')
+end
+
 # Knapsack example detector instantiates all test cases in order to determine how to shard them
 # These instantiations should not generate test bundles, so we
 # disable the gem when running under knapsack_pro:rspec_test_example_detector
@@ -204,12 +210,12 @@ def format_exception_message(exception, example)
   return '' unless exception
 
   presenter = RSpec::Core::Formatters::ExceptionPresenter.new(exception, example)
-  presenter.fully_formatted(nil, PlainColorizer)
+  strip_ansi_codes(presenter.fully_formatted(nil, PlainColorizer))
 rescue StandardError
   legacy_format_exception_message(exception)
 end
 
-# trunk-ignore(rubocop/Metrics/MethodLength)
+# trunk-ignore(rubocop/Metrics/MethodLength,rubocop/Metrics/AbcSize)
 def format_exception_backtrace(exception, example)
   return '' unless exception
 
@@ -230,7 +236,7 @@ def format_exception_backtrace(exception, example)
   # and after hooks, so we fall back to the legacy formatter
   return legacy_format_exception_backtrace(exception) if result.strip.empty?
 
-  result
+  strip_ansi_codes(result)
 rescue StandardError
   legacy_format_exception_backtrace(exception)
 end
@@ -246,25 +252,25 @@ def legacy_format_exception_message(exception)
   case exception
   when RSpec::Core::MultipleExceptionError
     messages = exception.all_exceptions.map { |e| "#{e.class}: #{e.message}" }
-    "#{exception.class}: #{messages.join(' | ')}"
+    strip_ansi_codes("#{exception.class}: #{messages.join(' | ')}")
   else
-    exception.to_s
+    strip_ansi_codes(exception.to_s)
   end
 end
 
-# trunk-ignore(rubocop/Metrics/MethodLength)
+# trunk-ignore(rubocop/Metrics/MethodLength,rubocop/Metrics/AbcSize)
 def legacy_format_exception_backtrace(exception)
   case exception
   when RSpec::Core::MultipleExceptionError
-    exception.all_exceptions.map do |e|
+    strip_ansi_codes(exception.all_exceptions.map do |e|
       if e.backtrace && !e.backtrace.empty?
         "#{e.class}: #{e.message}\n#{e.backtrace.join("\n")}"
       else
         "#{e.class}: #{e.message}"
       end
-    end.join("\n\n")
+    end.join("\n\n"))
   else
-    exception.backtrace&.join("\n") || ''
+    strip_ansi_codes(exception.backtrace&.join("\n") || '')
   end
 end