diff --git a/bin/test/watchexec-ruby-app b/bin/test/watchexec-ruby-app
deleted file mode 100755
index 70040bd5..00000000
--- a/bin/test/watchexec-ruby-app
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-bundle install
-bundle exec rake build
-cp -R features/support features/watchexec-ruby-app/retest
-ls -t pkg | head -n1 | xargs -I {} mv pkg/{} features/watchexec-ruby-app/retest.gem
-docker compose -f features/watchexec-ruby-app/docker-compose.yml up --build --exit-code-from retest
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/.gitignore b/features/watchexec-ruby-app/.gitignore
deleted file mode 100644
index 4e317b77..00000000
--- a/features/watchexec-ruby-app/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-.ruby-version
-retest.gem
-/tmp/*
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/Dockerfile b/features/watchexec-ruby-app/Dockerfile
deleted file mode 100644
index e441f4cd..00000000
--- a/features/watchexec-ruby-app/Dockerfile
+++ /dev/null
@@ -1,32 +0,0 @@
-FROM ruby:2.5.9-alpine3.13
-
-ARG BUILD_PACKAGES="build-base git"
-
-RUN apk update && \
-    apk upgrade && \
-    apk add --update --no-cache $BUILD_PACKAGES && \
-    rm -rf /var/cache/apk/*
-
-# throw errors if Gemfile has been modified since Gemfile.lock
-RUN bundle config --global frozen 1
-
-WORKDIR /usr/src/app
-
-ENV LANG C.UTF-8
-ENV BUNDLER_VERSION 2.1
-
-ENV GEM_HOME="/usr/local/bundle"
-ENV PATH $GEM_HOME/bin:$GEM_HOME/gems/bin:$PATH
-
-COPY watchexec /usr/bin/
-
-COPY Gemfile Gemfile.lock retest.gem ./
-RUN gem update --system 3.2.3
-RUN gem install bundler -v 2.1.4
-RUN bundle config --delete frozen
-RUN bundle install
-RUN gem install retest.gem
-
-COPY . /usr/src/app
-
-CMD ["retest", "--ruby"]
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/Gemfile b/features/watchexec-ruby-app/Gemfile
deleted file mode 100644
index d0c3b25a..00000000
--- a/features/watchexec-ruby-app/Gemfile
+++ /dev/null
@@ -1,3 +0,0 @@
-source 'https://rubygems.org'
-gem 'minitest', '~> 5.4'
-gem 'byebug'
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/Gemfile.lock b/features/watchexec-ruby-app/Gemfile.lock
deleted file mode 100644
index fd16f24d..00000000
--- a/features/watchexec-ruby-app/Gemfile.lock
+++ /dev/null
@@ -1,15 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    byebug (11.1.3)
-    minitest (5.14.0)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  byebug
-  minitest (~> 5.4)
-
-BUNDLED WITH
-   2.4.21
diff --git a/features/watchexec-ruby-app/LICENSE b/features/watchexec-ruby-app/LICENSE
deleted file mode 100644
index 7d5afaec..00000000
--- a/features/watchexec-ruby-app/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2020 Alexandre Barret
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/features/watchexec-ruby-app/README.md b/features/watchexec-ruby-app/README.md
deleted file mode 100644
index b5fbae12..00000000
--- a/features/watchexec-ruby-app/README.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# 99 Bottles
-
-## Installing Ruby
-
-### Windows
-
-There's an installer, it's easy.
-http://rubyinstaller.org/
-
-### Mac
-
-Newer macs ship with a usable version of Ruby.
-
-Try `ruby -v` in a terminal window, and if it's 1.9.x or 2.x you're fine.
-
-http://www.railstutorial.org/book/beginning#sec-install_ruby
-http://tutorials.jumpstartlab.com/topics/environment/environment.html
-http://docs.railsbridge.org/installfest/macintosh
-
-### Linux
-
-Ubuntu: http://docs.railsbridge.org/installfest/linux
-https://www.ruby-lang.org/en/installation/
diff --git a/features/watchexec-ruby-app/docker-compose.yml b/features/watchexec-ruby-app/docker-compose.yml
deleted file mode 100644
index c474455f..00000000
--- a/features/watchexec-ruby-app/docker-compose.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-services:
-  retest:
-    build: .
-    volumes:
-      - .:/usr/src/app
-    environment:
-      - DEFAULT_SLEEP_SECONDS=1
-      - LAUNCH_SLEEP_SECONDS=1.5
-    command: ruby retest/retest_test.rb
diff --git a/features/watchexec-ruby-app/lib/bottles.rb b/features/watchexec-ruby-app/lib/bottles.rb
deleted file mode 100644
index 48878942..00000000
--- a/features/watchexec-ruby-app/lib/bottles.rb
+++ /dev/null
@@ -1,119 +0,0 @@
-class CountdownSong
-  attr_reader :verse_template, :max, :min
-
-  def initialize(verse_template:, max: 999999, min: 0)
-    @verse_template = verse_template
-    @max, @min = max, min
-  end
-
-  def song
-    verses(max, min)
-  end
-
-  def verses(upper, lower)
-    upper.downto(lower).collect {|i| verse(i)}.join("\n")
-  end
-
-  def verse(number)
-    verse_template.lyrics(number)
-  end
-end
-
-
-class BottleVerse
-  def self.lyrics(number)
-    new(BottleNumber.for(number)).lyrics
-  end
-
-  attr_reader :bottle_number
-
-  def initialize(bottle_number)
-    @bottle_number = bottle_number
-  end
-
-  def lyrics
-    "#{bottle_number} of beer on the wall, ".capitalize +
-    "#{bottle_number} of beer.\n" +
-    "#{bottle_number.action}, " +
-    "#{bottle_number.successor} of beer on the wall.\n"
-  end
-end
-
-
-class BottleNumber
-  def self.for(number)
-    case number
-    when 0
-      BottleNumber0
-    when 1
-      BottleNumber1
-    when 6
-      BottleNumber6
-    else
-      BottleNumber
-    end.new(number)
-  end
-
-  attr_reader :number
-  def initialize(number)
-    @number = number
-  end
-
-  def to_s
-    "#{quantity} #{container}"
-  end
-
-  def quantity
-    number.to_s
-  end
-
-  def container
-    "bottles"
-  end
-
-  def action
-    "Take #{pronoun} down and pass it around"
-  end
-
-  def pronoun
-    "one"
-  end
-
-  def successor
-    BottleNumber.for(number - 1)
-  end
-end
-
-class BottleNumber0 < BottleNumber
-  def quantity
-    "no more"
-  end
-
-  def action
-    "Go to the store and buy some more"
-  end
-
-  def successor
-    BottleNumber.for(99)
-  end
-end
-
-class BottleNumber1 < BottleNumber
-  def container
-    "bottle"
-  end
-
-  def pronoun
-    "it"
-  end
-end
-
-class BottleNumber6 < BottleNumber
-  def quantity
-    "1"
-  end
-
-  def container
-    "six-pack"
-  end
-end
diff --git a/features/watchexec-ruby-app/retest/retest_test.rb b/features/watchexec-ruby-app/retest/retest_test.rb
deleted file mode 100644
index 40a3682c..00000000
--- a/features/watchexec-ruby-app/retest/retest_test.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-require 'retest'
-require_relative 'support/test_helper'
-require 'minitest/autorun'
-require_relative 'retest_test/file_changes_test'
-require_relative 'retest_test/setup_test'
-require_relative 'retest_test/matching_unmatching_command_test'
-
-$stdout.sync = true
-
-include FileHelper
-
-module WatchexecRuby
-  COMMAND = 'retest'
-end
diff --git a/features/watchexec-ruby-app/retest/retest_test/file_changes_test.rb b/features/watchexec-ruby-app/retest/retest_test/file_changes_test.rb
deleted file mode 100644
index ff43d576..00000000
--- a/features/watchexec-ruby-app/retest/retest_test/file_changes_test.rb
+++ /dev/null
@@ -1,83 +0,0 @@
-module WatchexecRuby
-  class FileChangesTest < Minitest::Test
-    def teardown
-      end_retest
-    end
-
-    def test_start_retest
-      launch_retest(COMMAND)
-
-      assert_match <<~EXPECTED, @output.read
-        Setup identified: [RUBY]. Using command: 'bundle exec ruby <test>'
-        Watcher: [WATCHEXEC]
-        Launching Retest...
-        Ready to refactor! You can make file changes now
-      EXPECTED
-    end
-
-    def test_modifying_existing_file
-      launch_retest @command
-
-      modify_file('lib/bottles.rb')
-
-      assert_match "Test file: test/bottles_test.rb", @output.read
-      assert_match "12 runs, 12 assertions, 0 failures, 0 errors, 0 skips", @output.read
-    end
-
-    def test_modifying_existing_test_file
-      launch_retest @command
-
-      modify_file('test/bottles_test.rb')
-
-      assert_match "Test file: test/bottles_test.rb", @output.read
-      assert_match "12 runs, 12 assertions, 0 failures, 0 errors, 0 skips", @output.read
-    end
-
-    def test_creating_a_new_test_file
-      launch_retest @command
-
-      create_file 'foo_test.rb'
-
-      assert_match "Test file: foo_test.rb", @output.read
-
-    ensure
-      delete_file 'foo_test.rb'
-    end
-
-    def test_creating_a_new_file
-      launch_retest @command
-
-      create_file 'foo.rb'
-      assert_match <<~EXPECTED, @output.read
-        FileNotFound - Retest could not find a matching test file to run.
-      EXPECTED
-
-      create_file 'foo_test.rb'
-      assert_match "Test file: foo_test.rb", @output.read
-
-      modify_file('lib/bottles.rb')
-      assert_match "Test file: test/bottles_test.rb", @output.read
-
-      modify_file('foo.rb')
-      assert_match "Test file: foo_test.rb", @output.read
-
-    ensure
-      delete_file 'foo.rb'
-      delete_file 'foo_test.rb'
-    end
-
-    def test_untracked_file
-      create_file 'foo.rb', should_sleep: false
-      create_file 'foo_test.rb', should_sleep: false
-
-      launch_retest @command
-
-      modify_file 'foo.rb'
-      assert_match "Test file: foo_test.rb", @output.read
-
-    ensure
-      delete_file 'foo.rb'
-      delete_file 'foo_test.rb'
-    end
-  end
-end
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/retest/retest_test/matching_unmatching_command_test.rb b/features/watchexec-ruby-app/retest/retest_test/matching_unmatching_command_test.rb
deleted file mode 100644
index 06a51317..00000000
--- a/features/watchexec-ruby-app/retest/retest_test/matching_unmatching_command_test.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-module WatchexecRuby
-  class MatchingUnmatchingCommandTest < Minitest::Test
-    def teardown
-      end_retest
-    end
-
-    def test_displaying_options_on_matching_command
-      create_file('test/other_bottles_test.rb', should_sleep: false)
-
-      launch_retest(COMMAND)
-
-      create_file 'foo_test.rb'
-      assert_match "Test file: foo_test.rb", @output.read
-
-      modify_file('lib/bottles.rb')
-      assert_match <<~EXPECTED.chomp, @output.read
-        We found few tests matching: lib/bottles.rb
-
-        [0] - test/bottles_test.rb
-        [1] - test/other_bottles_test.rb
-        [2] - none
-
-        Which file do you want to use?
-        Enter the file number now:
-        >
-      EXPECTED
-
-      @input.write "2\n"
-      wait
-
-      assert_match "Test file: foo_test.rb", @output.read
-
-    ensure
-      delete_file 'foo_test.rb'
-      delete_file('test/other_bottles_test.rb')
-    end
-  end
-end
diff --git a/features/watchexec-ruby-app/retest/retest_test/setup_test.rb b/features/watchexec-ruby-app/retest/retest_test/setup_test.rb
deleted file mode 100644
index 5c178d1e..00000000
--- a/features/watchexec-ruby-app/retest/retest_test/setup_test.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-module WatchexecRuby
-  class SetupTest < Minitest::Test
-    def test_repository_setup
-      assert_equal :ruby, Retest::Setup.new.type
-    end
-  end
-end
\ No newline at end of file
diff --git a/features/watchexec-ruby-app/retest/support/output_file.rb b/features/watchexec-ruby-app/retest/support/output_file.rb
deleted file mode 100644
index c58f646e..00000000
--- a/features/watchexec-ruby-app/retest/support/output_file.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-class OutputFile
-  attr_reader :output
-  def initialize
-    @output = Tempfile.new
-  end
-
-  def path
-    @output.path
-  end
-
-  def read
-    @output.rewind
-    @output.read.split('').last
-  end
-
-  def delete
-    @output.close
-    @output.unlink
-  end
-  alias :clear :delete
-end
diff --git a/features/watchexec-ruby-app/retest/support/test_helper.rb b/features/watchexec-ruby-app/retest/support/test_helper.rb
deleted file mode 100644
index 610a8f4b..00000000
--- a/features/watchexec-ruby-app/retest/support/test_helper.rb
+++ /dev/null
@@ -1,62 +0,0 @@
-# Can be updated to all feature repositories with
-# $ bin/test/reset_helpers
-
-require_relative 'output_file'
-
-module FileHelper
-  def default_sleep_seconds
-    Float(ENV.fetch('DEFAULT_SLEEP_SECONDS', 1))
-  end
-
-  def launch_sleep_seconds
-    Float(ENV.fetch('LAUNCH_SLEEP_SECONDS', 1.5))
-  end
-
-  def wait(sleep_seconds: default_sleep_seconds)
-    sleep sleep_seconds
-  end
-
-  def modify_file(path, sleep_seconds: default_sleep_seconds)
-    return unless File.exist? path
-
-    old_content = File.read(path)
-    File.open(path, 'w') { |file| file.write old_content }
-
-    sleep sleep_seconds
-  end
-
-  def create_file(path, should_sleep: true, sleep_seconds: default_sleep_seconds)
-    File.open(path, "w").tap(&:close)
-
-    sleep sleep_seconds if should_sleep
-  end
-
-  def delete_file(path)
-    return unless File.exist? path
-
-    File.delete path
-  end
-
-  def rename_file(path, new_path)
-    return unless File.exist? path
-
-    File.rename path, new_path
-  end
-end
-
-def launch_retest(command, sleep_seconds: launch_sleep_seconds)
-  @rd, @input = IO.pipe
-  @output = OutputFile.new
-  @pid = Process.spawn command, out: @output.path, in: @rd
-  sleep sleep_seconds
-end
-
-def end_retest(file = nil, pid = nil)
-  @output&.delete
-  @rd&.close
-  @input&.close
-  if @pid
-    Process.kill('SIGHUP', @pid)
-    Process.detach(@pid)
-  end
-end
diff --git a/features/watchexec-ruby-app/test/bottles_test.rb b/features/watchexec-ruby-app/test/bottles_test.rb
deleted file mode 100644
index 0f0e240a..00000000
--- a/features/watchexec-ruby-app/test/bottles_test.rb
+++ /dev/null
@@ -1,139 +0,0 @@
-gem 'minitest', '~> 5.4'
-require 'minitest/autorun'
-require 'minitest/pride'
-require_relative '../lib/bottles'
-
-module VerseRoleTest
-  def test_plays_verse_role
-    assert_respond_to @role_player, :lyrics
-  end
-end
-
-class VerseFake
-  def self.lyrics(number)
-    "This is verse #{number}.\n"
-  end
-end
-
-class VerseFakeTest < Minitest::Test
-  include VerseRoleTest
-
-  def setup
-    @role_player = VerseFake
-  end
-end
-
-
-class BottleVerseTest < Minitest::Test
-  include VerseRoleTest
-
-  def setup
-    @role_player = BottleVerse
-  end
-
-  def test_verse_general_rule_upper_bound
-    expected =
-      "99 bottles of beer on the wall, " +
-      "99 bottles of beer.\n" +
-      "Take one down and pass it around, " +
-      "98 bottles of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(99)
-  end
-
-  def test_verse_general_rule_lower_bound
-    expected =
-      "3 bottles of beer on the wall, " +
-      "3 bottles of beer.\n" +
-      "Take one down and pass it around, " +
-      "2 bottles of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(3)
-  end
-
-  def test_verse_7
-    expected =
-      "7 bottles of beer on the wall, " +
-      "7 bottles of beer.\n" +
-      "Take one down and pass it around, " +
-      "1 six-pack of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(7)
-  end
-
-  def test_verse_6
-    expected =
-      "1 six-pack of beer on the wall, " +
-      "1 six-pack of beer.\n" +
-      "Take one down and pass it around, " +
-      "5 bottles of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(6)
-  end
-
-  def test_verse_2
-    expected =
-      "2 bottles of beer on the wall, " +
-      "2 bottles of beer.\n" +
-      "Take one down and pass it around, " +
-      "1 bottle of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(2)
-  end
-
-  def test_verse_1
-    expected =
-      "1 bottle of beer on the wall, " +
-      "1 bottle of beer.\n" +
-      "Take it down and pass it around, " +
-      "no more bottles of beer on the wall.\n"
-     assert_equal expected, BottleVerse.lyrics(1)
-  end
-
-  def test_verse_0
-    expected =
-      "No more bottles of beer on the wall, " +
-      "no more bottles of beer.\n" +
-      "Go to the store and buy some more, " +
-      "99 bottles of beer on the wall.\n"
-    assert_equal expected, BottleVerse.lyrics(0)
-  end
-end
-
-
-class CountdownSongTest < Minitest::Test
-  def test_verse
-    expected = "This is verse 500.\n"
-    assert_equal(
-      expected,
-      CountdownSong.new(verse_template: VerseFake)
-        .verse(500))
-  end
-
-  def test_verses
-    expected =
-     "This is verse 99.\n" +
-     "\n" +
-     "This is verse 98.\n" +
-     "\n" +
-     "This is verse 97.\n"
-    assert_equal(
-      expected,
-      CountdownSong.new(verse_template: VerseFake)
-        .verses(99, 97))
-  end
-
-  def test_song
-    expected =
-      "This is verse 47.\n" +
-      "\n" +
-      "This is verse 46.\n" +
-      "\n" +
-      "This is verse 45.\n" +
-      "\n" +
-      "This is verse 44.\n" +
-      "\n" +
-      "This is verse 43.\n"
-    assert_equal(
-      expected,
-      CountdownSong.new(verse_template: VerseFake,
-                        max: 47,
-                        min: 43)
-        .song)
-  end
-end
diff --git a/features/watchexec-ruby-app/watchexec b/features/watchexec-ruby-app/watchexec
deleted file mode 100755
index 1b8b1738..00000000
Binary files a/features/watchexec-ruby-app/watchexec and /dev/null differ