From 65ebb49121b1396b6c51818a3142474b40320f9a Mon Sep 17 00:00:00 2001
From: Matt Brictson <matt@mattbrictson.com>
Date: Tue, 25 Aug 2026 20:57:10 -0700
Subject: [PATCH 1/4] Remove rubocop-minitest and mighty_test

---
 .rubocop.yml |  9 ++-------
 Gemfile      |  2 --
 bin/mt       | 27 ---------------------------
 3 files changed, 2 insertions(+), 36 deletions(-)
 delete mode 100755 bin/mt

diff --git a/.rubocop.yml b/.rubocop.yml
index 1888665..f0be457 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,4 @@
 plugins:
-  - rubocop-minitest
   - rubocop-factory_bot
   - rubocop-packaging
   - rubocop-performance
@@ -10,6 +9,8 @@ AllCops:
   DisplayStyleGuide: true
   NewCops: enable
   TargetRubyVersion: 2.7
+  SuggestExtensions:
+    rubocop-minitest: false
   Exclude:
     - "bin/*"
     - "test/fixtures/**/*"
@@ -74,12 +75,6 @@ Metrics/MethodLength:
 Metrics/ParameterLists:
   Max: 6
 
-Minitest/EmptyLineBeforeAssertionMethods:
-  Enabled: false
-
-Minitest/MultipleAssertions:
-  Max: 6
-
 Naming/MemoizedInstanceVariableName:
   Enabled: false
 
diff --git a/Gemfile b/Gemfile
index 4ea2fb9..bc90498 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,10 +17,8 @@ gem "vcr", "~> 6.2"
 gem "webmock", "~> 3.23"
 
 if RUBY_VERSION >= "3.3"
-  gem "mighty_test", "~> 0.3"
   gem "rubocop", "1.88.2"
   gem "rubocop-factory_bot", "2.28.0"
-  gem "rubocop-minitest", "0.40.0"
   gem "rubocop-packaging", "0.6.0"
   gem "rubocop-performance", "1.26.1"
   gem "rubocop-rake", "0.7.1"
diff --git a/bin/mt b/bin/mt
deleted file mode 100755
index 3911e1c..0000000
--- a/bin/mt
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-#
-# This file was generated by Bundler.
-#
-# The application 'mt' is installed as part of a gem, and
-# this file is here to facilitate running it.
-#
-
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
-
-bundle_binstub = File.expand_path("bundle", __dir__)
-
-if File.file?(bundle_binstub)
-  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
-    load(bundle_binstub)
-  else
-    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
-Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
-  end
-end
-
-require "rubygems"
-require "bundler/setup"
-
-load Gem.bin_path("mighty_test", "mt")

From a4f30dde8596e32c2e7ed10eb00b133a24014625 Mon Sep 17 00:00:00 2001
From: Matt Brictson <matt@mattbrictson.com>
Date: Tue, 25 Aug 2026 20:58:38 -0700
Subject: [PATCH 2/4] Switch from minitest to megatest

---
 Gemfile                                       |  2 +-
 Rakefile                                      |  9 ++++-----
 bin/megatest                                  | 16 ++++++++++++++++
 .../bundler_commands_test.rb                  |  3 +--
 .../changelog_locator_test.rb                 |  4 +---
 .../cli/multi_select_test.rb                  |  3 +--
 .../cli/options_test.rb                       |  4 +---
 .../bundle_update_interactive/cli/row_test.rb |  4 +---
 test/bundle_update_interactive/cli_test.rb    |  4 +---
 .../git_committer_test.rb                     |  4 +---
 test/bundle_update_interactive/http_test.rb   |  3 +--
 .../latest/gem_requirement_test.rb            |  4 +---
 .../latest/gemfile_editor_test.rb             |  3 +--
 .../latest/updater_test.rb                    |  3 +--
 .../lockfile_test.rb                          |  4 +---
 .../outdated_gem_test.rb                      |  4 +---
 .../semver_change_test.rb                     |  4 +---
 .../bundle_update_interactive/updater_test.rb |  3 +--
 test/bundle_update_interactive_test.rb        |  4 +---
 test/integration/cli_integration_test.rb      |  3 +--
 test/support/bundler_audit_test_helpers.rb    |  2 +-
 test/support/capture_io_helpers.rb            |  4 ++--
 test/support/factory_bot.rb                   |  2 +-
 test/support/mocha.rb                         | 19 ++++++++++++++++++-
 test/support/snapshots.rb                     | 13 +++++++++++++
 test/support/webmock.rb                       | 15 ++++++++++++++-
 test/test_config.rb                           |  5 +++++
 test/test_helper.rb                           |  7 +++++--
 28 files changed, 97 insertions(+), 58 deletions(-)
 create mode 100755 bin/megatest
 create mode 100644 test/support/snapshots.rb
 create mode 100644 test/test_config.rb

diff --git a/Gemfile b/Gemfile
index bc90498..ff872d7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@ gem "activesupport", "~> 7.1.3" # Needed for factory_bot 6.3
 gem "cgi" # Needed for vcr on Ruby 3.5+
 gem "factory_bot", "~> 6.3.0"
 gem "irb"
-gem "minitest", "~> 5.11"
+gem "megatest", "~> 0.11.0"
 gem "minitest-snapshots", "~> 1.1"
 gem "mocha", "~> 3.0"
 gem "observer"
diff --git a/Rakefile b/Rakefile
index 6641ee9..279658a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
-require "rake/testtask"
+require "megatest/test_task"
 
-Rake::TestTask.new(:test) do |t|
-  t.libs << "test"
-  t.libs << "lib"
-  t.test_files = FileList["test/**/*_test.rb"]
+Megatest::TestTask.create(:test) do |t|
+  t.command = "bin/megatest"
+  t.tests = FileList["test/**/*_test.rb"]
 end
 
 if Gem.loaded_specs.key?("rubocop")
diff --git a/bin/megatest b/bin/megatest
new file mode 100755
index 0000000..c0f62b3
--- /dev/null
+++ b/bin/megatest
@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'megatest' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("megatest", "megatest")
diff --git a/test/bundle_update_interactive/bundler_commands_test.rb b/test/bundle_update_interactive/bundler_commands_test.rb
index 9098650..4f18a67 100644
--- a/test/bundle_update_interactive/bundler_commands_test.rb
+++ b/test/bundle_update_interactive/bundler_commands_test.rb
@@ -1,10 +1,9 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "bundler"
 
 module BundleUpdateInteractive
-  class BundlerCommandsTest < Minitest::Test
+  class BundlerCommandsTest < Test
     def setup
       Gem.stubs(:bin_path).with("bundler", "bundle", Bundler::VERSION).returns("/exe/bundle")
     end
diff --git a/test/bundle_update_interactive/changelog_locator_test.rb b/test/bundle_update_interactive/changelog_locator_test.rb
index 2103acb..134e7fc 100644
--- a/test/bundle_update_interactive/changelog_locator_test.rb
+++ b/test/bundle_update_interactive/changelog_locator_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class ChangelogLocatorTest < Minitest::Test
+  class ChangelogLocatorTest < Test
     def test_fetches_changelog_uri_from_rubygems
       VCR.use_cassette("changelog_requests") do
         uri = ChangelogLocator.new.find_changelog_uri(name: "nokogiri", version: "1.16.6")
diff --git a/test/bundle_update_interactive/cli/multi_select_test.rb b/test/bundle_update_interactive/cli/multi_select_test.rb
index e841503..fa9e861 100644
--- a/test/bundle_update_interactive/cli/multi_select_test.rb
+++ b/test/bundle_update_interactive/cli/multi_select_test.rb
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "launchy"
 require "tty/prompt/test"
 
 module BundleUpdateInteractive
   class CLI
-    class MultiSelectTest < Minitest::Test
+    class MultiSelectTest < Test
       ARROW_UP = "\e[A"
       ARROW_DOWN = "\e[B"
       CTRL_A = "\u0001"
diff --git a/test/bundle_update_interactive/cli/options_test.rb b/test/bundle_update_interactive/cli/options_test.rb
index c4860ac..9578b73 100644
--- a/test/bundle_update_interactive/cli/options_test.rb
+++ b/test/bundle_update_interactive/cli/options_test.rb
@@ -1,10 +1,8 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
   class CLI
-    class OptionsTest < Minitest::Test
+    class OptionsTest < Test
       def test_prints_help_and_exits_when_given_dash_h
         stdout, _stderr, status = capture_io_and_exit_status do
           Options.parse(%w[-h])
diff --git a/test/bundle_update_interactive/cli/row_test.rb b/test/bundle_update_interactive/cli/row_test.rb
index ce3e9f9..2422e41 100644
--- a/test/bundle_update_interactive/cli/row_test.rb
+++ b/test/bundle_update_interactive/cli/row_test.rb
@@ -1,10 +1,8 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
   class CLI
-    class RowTest < Minitest::Test
+    class RowTest < Test
       def test_formatted_gem_name_for_vulnerable_gem_is_red_on_white
         outdated_gem = build(:outdated_gem, name: "rails", vulnerable: true)
         row = Row.new(outdated_gem)
diff --git a/test/bundle_update_interactive/cli_test.rb b/test/bundle_update_interactive/cli_test.rb
index a8de774..79777ef 100644
--- a/test/bundle_update_interactive/cli_test.rb
+++ b/test/bundle_update_interactive/cli_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class CLIIest < Minitest::Test
+  class CLITest < Test
     def test_shows_help_and_exits
       stdout, stderr, status = capture_io_and_exit_status do
         CLI.new.run(argv: %w[--help])
diff --git a/test/bundle_update_interactive/git_committer_test.rb b/test/bundle_update_interactive/git_committer_test.rb
index b251a3c..a1f6b93 100644
--- a/test/bundle_update_interactive/git_committer_test.rb
+++ b/test/bundle_update_interactive/git_committer_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class GitCommitterTest < Minitest::Test
+  class GitCommitterTest < Test
     def setup
       @git_committer = GitCommitter.new(nil)
     end
diff --git a/test/bundle_update_interactive/http_test.rb b/test/bundle_update_interactive/http_test.rb
index a466631..d2f79fc 100644
--- a/test/bundle_update_interactive/http_test.rb
+++ b/test/bundle_update_interactive/http_test.rb
@@ -1,11 +1,10 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "openssl"
 require "net/http"
 
 module BundleUpdateInteractive
-  class HttpTest < Minitest::Test
+  class HttpTest < Test
     def test_gracefully_handles_openssl_error
       Net::HTTP.stubs(:start).raises(OpenSSL::SSL::SSLError)
 
diff --git a/test/bundle_update_interactive/latest/gem_requirement_test.rb b/test/bundle_update_interactive/latest/gem_requirement_test.rb
index 0a0e924..3d0edd2 100644
--- a/test/bundle_update_interactive/latest/gem_requirement_test.rb
+++ b/test/bundle_update_interactive/latest/gem_requirement_test.rb
@@ -1,10 +1,8 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
   module Latest
-    class GemRequirementTest < Minitest::Test
+    class GemRequirementTest < Test
       def test_relax_doesnt_affect_greater_than_equal_requirements
         assert_equal(">= 1.0.1", parse(">= 1.0.1").relax.to_s)
       end
diff --git a/test/bundle_update_interactive/latest/gemfile_editor_test.rb b/test/bundle_update_interactive/latest/gemfile_editor_test.rb
index 863e437..6db90f7 100644
--- a/test/bundle_update_interactive/latest/gemfile_editor_test.rb
+++ b/test/bundle_update_interactive/latest/gemfile_editor_test.rb
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "fileutils"
 require "tmpdir"
 
 module BundleUpdateInteractive
   module Latest
-    class GemfileEditorTest < Minitest::Test
+    class GemfileEditorTest < Test
       def setup
         @original_dir = Dir.pwd
         @temp_dir = Dir.mktmpdir
diff --git a/test/bundle_update_interactive/latest/updater_test.rb b/test/bundle_update_interactive/latest/updater_test.rb
index e174bc8..b6f9502 100644
--- a/test/bundle_update_interactive/latest/updater_test.rb
+++ b/test/bundle_update_interactive/latest/updater_test.rb
@@ -1,11 +1,10 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "bundler"
 
 module BundleUpdateInteractive
   module Latest
-    class UpdaterTest < Minitest::Test
+    class UpdaterTest < Test
       def test_generate_report_doesnt_run_bundle_outdated_and_always_returns_no_withheld_gems
         Dir.chdir(File.expand_path("../../fixtures", __dir__)) do
           updated_lockfile = File.read("Gemfile.lock.updated")
diff --git a/test/bundle_update_interactive/lockfile_test.rb b/test/bundle_update_interactive/lockfile_test.rb
index 8e97c8d..f956129 100644
--- a/test/bundle_update_interactive/lockfile_test.rb
+++ b/test/bundle_update_interactive/lockfile_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class LockfileTest < Minitest::Test
+  class LockfileTest < Test
     def test_parses_a_lockfile_into_entries_by_name
       lockfile = Lockfile.parse(File.read(File.expand_path("../fixtures/Gemfile.lock", __dir__)))
 
diff --git a/test/bundle_update_interactive/outdated_gem_test.rb b/test/bundle_update_interactive/outdated_gem_test.rb
index 12be2bc..cacde28 100644
--- a/test/bundle_update_interactive/outdated_gem_test.rb
+++ b/test/bundle_update_interactive/outdated_gem_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class OutdatedGemTest < Minitest::Test
+  class OutdatedGemTest < Test
     def test_changelog_uri_delegates_to_changelog_locator_for_rubygems_source
       changelog_locator = mock
       ChangelogLocator.expects(:new).returns(changelog_locator)
diff --git a/test/bundle_update_interactive/semver_change_test.rb b/test/bundle_update_interactive/semver_change_test.rb
index 07ef910..ddef896 100644
--- a/test/bundle_update_interactive/semver_change_test.rb
+++ b/test/bundle_update_interactive/semver_change_test.rb
@@ -1,9 +1,7 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
 module BundleUpdateInteractive
-  class SemverChangeTest < Minitest::Test
+  class SemverChangeTest < Test
     def test_prerelease_is_considered_patch
       change = SemverChange.new("7.2.0.beta2", "7.2.0.beta3")
 
diff --git a/test/bundle_update_interactive/updater_test.rb b/test/bundle_update_interactive/updater_test.rb
index 8ae2ce7..de0dd9f 100644
--- a/test/bundle_update_interactive/updater_test.rb
+++ b/test/bundle_update_interactive/updater_test.rb
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "bundler"
 require "bundler/audit"
 require "bundler/audit/scanner"
 
 module BundleUpdateInteractive
-  class UpdaterTest < Minitest::Test
+  class UpdaterTest < Test
     def test_generates_a_report_of_updatable_gems_that_can_be_rendered_as_a_table
       VCR.use_cassette("changelog_requests") do
         Dir.chdir(File.expand_path("../fixtures", __dir__)) do
diff --git a/test/bundle_update_interactive_test.rb b/test/bundle_update_interactive_test.rb
index 7aaa048..56965c4 100644
--- a/test/bundle_update_interactive_test.rb
+++ b/test/bundle_update_interactive_test.rb
@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
-require "test_helper"
-
-class BundleUpdateInteractiveTest < Minitest::Test
+class BundleUpdateInteractiveTest < BundleUpdateInteractive::Test
   def test_that_it_has_a_version_number
     refute_nil ::BundleUpdateInteractive::VERSION
   end
diff --git a/test/integration/cli_integration_test.rb b/test/integration/cli_integration_test.rb
index ce30456..665b49c 100644
--- a/test/integration/cli_integration_test.rb
+++ b/test/integration/cli_integration_test.rb
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
-require "test_helper"
 require "json"
 require "open3"
 require "tmpdir"
 
 module BundleUpdateInteractive
-  class CLIIntegrationIest < Minitest::Test
+  class CLIIntegrationIest < Test
     def test_updates_lock_file_based_on_selected_gem_while_honoring_gemfile_requirement
       out, _gemfile, lockfile = within_fixture_copy("integration") do
         run_bundle_update_interactive(argv: [], key_presses: "j \n")
diff --git a/test/support/bundler_audit_test_helpers.rb b/test/support/bundler_audit_test_helpers.rb
index f91de78..6e5110b 100644
--- a/test/support/bundler_audit_test_helpers.rb
+++ b/test/support/bundler_audit_test_helpers.rb
@@ -17,4 +17,4 @@ def mock_vulnerable_gems(*gem_names)
   end
 end
 
-Minitest::Test.include(BundlerAuditTestHelpers)
+BundleUpdateInteractive::Test.include(BundlerAuditTestHelpers)
diff --git a/test/support/capture_io_helpers.rb b/test/support/capture_io_helpers.rb
index 38cffc3..eb9c25c 100644
--- a/test/support/capture_io_helpers.rb
+++ b/test/support/capture_io_helpers.rb
@@ -6,7 +6,7 @@
 module CaptureIOHelpers
   private
 
-  # Patch Minitest's capture_io to make it compatible with TTY::Prompt
+  # Patch Megatest's capture_io to make it compatible with TTY::Prompt
   def capture_io
     super do
       $stdout.extend(TTY::Prompt::StringIOExtensions) if $stdout.is_a?(StringIO)
@@ -37,4 +37,4 @@ def capture_io_and_exit_status(stdin_data: "")
   end
 end
 
-Minitest::Test.prepend(CaptureIOHelpers)
+BundleUpdateInteractive::Test.prepend CaptureIOHelpers
diff --git a/test/support/factory_bot.rb b/test/support/factory_bot.rb
index 6d64e88..263bc6e 100644
--- a/test/support/factory_bot.rb
+++ b/test/support/factory_bot.rb
@@ -4,7 +4,7 @@
 
 FactoryBot.find_definitions
 
-module Minitest
+module BundleUpdateInteractive
   class Test
     include FactoryBot::Syntax::Methods
   end
diff --git a/test/support/mocha.rb b/test/support/mocha.rb
index 82fa2e5..548ec08 100644
--- a/test/support/mocha.rb
+++ b/test/support/mocha.rb
@@ -1,7 +1,24 @@
 # frozen_string_literal: true
 
-require "mocha/minitest"
+require "mocha/api"
 
 Mocha.configure do |config|
   config.stubbing_non_existent_method = :prevent
 end
+
+Mocha::ExpectationErrorFactory.exception_class = Megatest::Assertion
+
+module BundleUpdateInteractive
+  class Test
+    include Mocha::API
+
+    setup do
+      mocha_setup
+    end
+
+    teardown do
+      @__m.record_failures { mocha_verify }
+      mocha_teardown
+    end
+  end
+end
diff --git a/test/support/snapshots.rb b/test/support/snapshots.rb
new file mode 100644
index 0000000..20cf17b
--- /dev/null
+++ b/test/support/snapshots.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require "minitest/snapshots_plugin"
+require "minitest/snapshots/assertion_extensions"
+require "minitest/snapshots/test_extensions"
+
+module BundleUpdateInteractive
+  class Test
+    include Minitest::Snapshots::TestExtensions
+
+    define_method(:assert_matches_snapshot, Minitest::Assertions.instance_method(:assert_matches_snapshot))
+  end
+end
diff --git a/test/support/webmock.rb b/test/support/webmock.rb
index fee65bf..175b1b0 100644
--- a/test/support/webmock.rb
+++ b/test/support/webmock.rb
@@ -1,3 +1,16 @@
 # frozen_string_literal: true
 
-require "webmock/minitest"
+require "webmock"
+
+WebMock.enable!
+WebMock::AssertionFailure.error_class = Megatest::Assertion
+
+module BundleUpdateInteractive
+  class Test
+    include WebMock::API
+
+    teardown do
+      WebMock.reset!
+    end
+  end
+end
diff --git a/test/test_config.rb b/test/test_config.rb
new file mode 100644
index 0000000..ca756b6
--- /dev/null
+++ b/test/test_config.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+Megatest.config do |config|
+  config.minitest_compatibility = true
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 7e2d846..0e30a1b 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,9 +1,12 @@
 # frozen_string_literal: true
 
-$LOAD_PATH.unshift File.expand_path("../lib", __dir__)
 require "bundle_update_interactive"
-require "minitest/autorun"
 
 BundleUpdateInteractive.pastel = Pastel.new(enabled: true)
 
+module BundleUpdateInteractive
+  class Test < Megatest::Test
+  end
+end
+
 Dir[File.expand_path("support/**/*.rb", __dir__)].sort.each { |rb| require(rb) }

From 17304273a0139d9685385a1f6fbbf607fbab1945 Mon Sep 17 00:00:00 2001
From: Matt Brictson <matt@mattbrictson.com>
Date: Tue, 25 Aug 2026 20:32:23 -0700
Subject: [PATCH 3/4] Avoid file edits that pollute parallel tests

---
 test/bundle_update_interactive/latest/updater_test.rb | 4 ++--
 test/integration/cli_integration_test.rb              | 8 --------
 test/test_helper.rb                                   | 9 +++++++++
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/test/bundle_update_interactive/latest/updater_test.rb b/test/bundle_update_interactive/latest/updater_test.rb
index b6f9502..499e7a2 100644
--- a/test/bundle_update_interactive/latest/updater_test.rb
+++ b/test/bundle_update_interactive/latest/updater_test.rb
@@ -6,7 +6,7 @@ module BundleUpdateInteractive
   module Latest
     class UpdaterTest < Test
       def test_generate_report_doesnt_run_bundle_outdated_and_always_returns_no_withheld_gems
-        Dir.chdir(File.expand_path("../../fixtures", __dir__)) do
+        within_fixture_copy do
           updated_lockfile = File.read("Gemfile.lock.updated")
           BundlerCommands.expects(:read_updated_lockfile).with.returns(updated_lockfile)
           BundlerCommands.expects(:parse_outdated).never
@@ -18,7 +18,7 @@ def test_generate_report_doesnt_run_bundle_outdated_and_always_returns_no_withhe
       end
 
       def test_generate_report_relaxes_gemfile_and_restores_it
-        Dir.chdir(File.expand_path("../../fixtures", __dir__)) do
+        within_fixture_copy do
           updatable_gems = { "sqlite3" => build(:outdated_gem, name: "sqlite3") }
           editor = GemfileEditor.new
           editor.expects(:with_relaxed_gemfile).returns(updatable_gems)
diff --git a/test/integration/cli_integration_test.rb b/test/integration/cli_integration_test.rb
index 665b49c..b57d10d 100644
--- a/test/integration/cli_integration_test.rb
+++ b/test/integration/cli_integration_test.rb
@@ -117,14 +117,6 @@ def run_bundle_update_interactive(argv:, key_presses: "\n")
       end
     end
 
-    def within_fixture_copy(fixture, &block)
-      fixture_path = File.join(File.expand_path("../fixtures", __dir__), fixture)
-      Dir.mktmpdir do |tmp|
-        FileUtils.cp_r(fixture_path, tmp)
-        Dir.chdir(File.join(tmp, File.basename(fixture_path)), &block)
-      end
-    end
-
     def fetch_latest_gem_version_from_rubygems_api(name)
       WebMock.allow_net_connect!
       VCR.turned_off do
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 0e30a1b..e8124c4 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -6,6 +6,15 @@
 
 module BundleUpdateInteractive
   class Test < Megatest::Test
+    private
+
+    def within_fixture_copy(fixture=".", &block)
+      fixture_path = File.join(File.expand_path("fixtures", __dir__), fixture)
+      Dir.mktmpdir do |tmp|
+        FileUtils.cp_r(fixture_path, tmp)
+        Dir.chdir(File.join(tmp, File.basename(fixture_path)), &block)
+      end
+    end
   end
 end
 

From 11f921491b6712b3eea616c218500f01f179ef2f Mon Sep 17 00:00:00 2001
From: Matt Brictson <matt@mattbrictson.com>
Date: Wed, 26 Aug 2026 20:01:43 -0700
Subject: [PATCH 4/4] Add testing instructions to README

---
 README.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index a2707d7..13d68d0 100644
--- a/README.md
+++ b/README.md
@@ -232,6 +232,8 @@ Everyone interacting in this project’s codebases, issue trackers, chat rooms a
 
 Pull requests are welcome!
 
-To test your locally cloned version of `bundle update-interactive`, run `rake install`. This will install the gem and its executable so that you can try it out on other local projects.
+To test your locally cloned version of `bundle update-interactive`, run `bundle exec rake install`. This will install the gem and its executable so that you can try it out on other local projects.
 
-Before submitting a PR, make sure to run `rake` to see if there are any RuboCop or test failures.
+Run `bundle exec rake` to run all tests and RuboCop checks. Please do this before opening a PR.
+
+To run a specific test, use `bin/megatest <TEST>`.