diff --git a/.rubocop.yml b/.rubocop.yml
index a58cedd15c..8dfa0311a9 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -83,3 +83,6 @@ RSpec/MultipleMemoizedHelpers:
 
 RSpec/ContextWording:
   Enabled: false
+
+RSpecRails/HaveHttpStatus:
+  Enabled: false
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index faac38752a..f8f44abc88 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
-# `rubocop --auto-gen-config --auto-gen-only-exclude --exclude-limit 5000`
-# on 2024-04-15 16:22:26 UTC using RuboCop version 1.59.0.
+# `rubocop --auto-gen-config`
+# on 2024-04-17 16:26:06 UTC using RuboCop version 1.63.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -261,11 +261,9 @@ Style/FormatStringToken:
 
 # Offense count: 1
 # This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: AllowedReceivers.
-# AllowedReceivers: Thread.current
-Style/HashEachMethods:
+Style/MapIntoArray:
   Exclude:
-    - 'lib/grape/middleware/stack.rb'
+    - 'spec/support/chunks.rb'
 
 # Offense count: 12
 # Configuration parameters: AllowedMethods.
diff --git a/Appraisals b/Appraisals
deleted file mode 100644
index e9a6f2a42e..0000000000
--- a/Appraisals
+++ /dev/null
@@ -1,60 +0,0 @@
-# frozen_string_literal: true
-
-customize_gemfiles do
-  {
-    single_quotes: true,
-    heading: "frozen_string_literal: true
-
-This file was generated by Appraisal"
-  }
-end
-
-appraise 'rails-6-0' do
-  gem 'rails', '~> 6.0.0'
-end
-
-appraise 'rails-6-1' do
-  gem 'rails', '~> 6.1'
-end
-
-appraise 'rails-7-0' do
-  gem 'rails', '~> 7.0.0'
-end
-
-appraise 'rails-7-1' do
-  gem 'rails', '~> 7.1.0'
-end
-
-appraise 'rails-edge' do
-  gem 'rails', github: 'rails/rails'
-end
-
-appraise 'rack-edge' do
-  gem 'rack', github: 'rack/rack'
-end
-
-appraise 'multi_json' do
-  gem 'multi_json', require: 'multi_json'
-end
-
-appraise 'multi_xml' do
-  gem 'multi_xml', require: 'multi_xml'
-end
-
-appraise 'rack_1_0' do
-  gem 'rack', '~> 1.0'
-end
-
-appraise 'rack_2_0' do
-  gem 'rack', '~> 2.0'
-end
-
-appraise 'rack_3_0' do
-  gem 'rack', '~> 3.0.0'
-end
-
-appraise 'dry_validation' do
-  group :development, :test do
-    remove_gem 'dry-validation'
-  end
-end
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7d41d4e6d..963ad514aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@
 * [#2363](https://github.com/ruby-grape/grape/pull/2363): Replace autoload by zeitwerk - [@ericproulx](https://github.com/ericproulx).
 * [#2425](https://github.com/ruby-grape/grape/pull/2425): Replace `{}` with `Rack::Header` or `Rack::Utils::HeaderHash` - [@dhruvCW](https://github.com/dhruvCW).
 * [#2430](https://github.com/ruby-grape/grape/pull/2430): Isolate extensions within specific gemfile - [@ericproulx](https://github.com/ericproulx).
+* [#2431](https://github.com/ruby-grape/grape/pull/2431): Drop appraisals in favor of eval_gemfile - [@ericproulx](https://github.com/ericproulx).
 * Your contribution here.
 
 #### Fixes
diff --git a/Gemfile b/Gemfile
index fe90b51e84..cf63280c51 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,13 +9,12 @@ gemspec
 group :development, :test do
   gem 'bundler'
   gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
+  gem 'rubocop', '1.63.2', require: false
+  gem 'rubocop-performance', '1.21.0', require: false
+  gem 'rubocop-rspec', '2.29.1', require: false
 end
 
 group :development do
-  gem 'appraisal'
   gem 'benchmark-ips'
   gem 'benchmark-memory'
   gem 'guard'
@@ -25,11 +24,11 @@ end
 
 group :test do
   gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
+  gem 'rack-test', '~> 2.1'
+  gem 'rspec', '~> 3.13'
+  gem 'ruby-grape-danger', '~> 0.2', require: false
+  gem 'simplecov', '~> 0.21'
+  gem 'simplecov-lcov', '~> 0.8'
   gem 'test-prof', require: false
 end
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 2b293708b1..a86e58625f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,3 +15,5 @@ services:
     volumes:
       - .:/var/grape
       - gems:/usr/local/bundle
+    environment:
+      GEMFILE: multi_xml
diff --git a/gemfiles/dry_validation.gemfile b/gemfiles/dry_validation.gemfile
index 65231ea800..ad526a00f2 100644
--- a/gemfiles/dry_validation.gemfile
+++ b/gemfiles/dry_validation.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'dry-validation'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/grape_entity.gemfile b/gemfiles/grape_entity.gemfile
index 241e0adb1d..6baf20174d 100644
--- a/gemfiles/grape_entity.gemfile
+++ b/gemfiles/grape_entity.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'grape-entity'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/hashie.gemfile b/gemfiles/hashie.gemfile
index 7bf7b2bbcd..c45181b01f 100644
--- a/gemfiles/hashie.gemfile
+++ b/gemfiles/hashie.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'hashie'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/multi_json.gemfile b/gemfiles/multi_json.gemfile
index 20e5e98cb0..014c2f9c65 100644
--- a/gemfiles/multi_json.gemfile
+++ b/gemfiles/multi_json.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
+gem 'multi_json'
 
-source 'https://rubygems.org'
-
-gem 'multi_json', require: 'multi_json'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
+eval_gemfile '../Gemfile'
diff --git a/gemfiles/multi_xml.gemfile b/gemfiles/multi_xml.gemfile
index c4f147df16..3cd7774f99 100644
--- a/gemfiles/multi_xml.gemfile
+++ b/gemfiles/multi_xml.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
+gem 'multi_xml'
 
-source 'https://rubygems.org'
-
-gem 'multi_xml', require: 'multi_xml'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
+eval_gemfile '../Gemfile'
diff --git a/gemfiles/rack_2_0.gemfile b/gemfiles/rack_2_0.gemfile
index 323b23ce72..f43035ba62 100644
--- a/gemfiles/rack_2_0.gemfile
+++ b/gemfiles/rack_2_0.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rack', '~> 2.0'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rack_3_0.gemfile b/gemfiles/rack_3_0.gemfile
index 55188980dc..4025f3cc25 100644
--- a/gemfiles/rack_3_0.gemfile
+++ b/gemfiles/rack_3_0.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rack', '~> 3.0.0'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rack_edge.gemfile b/gemfiles/rack_edge.gemfile
index 53ea7d831d..975ceedbf1 100644
--- a/gemfiles/rack_edge.gemfile
+++ b/gemfiles/rack_edge.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rack', github: 'rack/rack'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rails_6_0.gemfile b/gemfiles/rails_6_0.gemfile
index ae6ae7c42b..8a9e3b2475 100644
--- a/gemfiles/rails_6_0.gemfile
+++ b/gemfiles/rails_6_0.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rails', '~> 6.0.0'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rails_6_1.gemfile b/gemfiles/rails_6_1.gemfile
index b7553c7522..ad33d3a3e4 100644
--- a/gemfiles/rails_6_1.gemfile
+++ b/gemfiles/rails_6_1.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rails', '~> 6.1'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rails_7_0.gemfile b/gemfiles/rails_7_0.gemfile
index 118579d80d..43db352ec4 100644
--- a/gemfiles/rails_7_0.gemfile
+++ b/gemfiles/rails_7_0.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rails', '~> 7.0.0'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rails_7_1.gemfile b/gemfiles/rails_7_1.gemfile
index 610d0b6cf1..babb65fd70 100644
--- a/gemfiles/rails_7_1.gemfile
+++ b/gemfiles/rails_7_1.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rails', '~> 7.1.0'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/gemfiles/rails_edge.gemfile b/gemfiles/rails_edge.gemfile
index bc18d40f62..80b01d94e1 100644
--- a/gemfiles/rails_edge.gemfile
+++ b/gemfiles/rails_edge.gemfile
@@ -1,40 +1,5 @@
 # frozen_string_literal: true
 
-# This file was generated by Appraisal
-
-source 'https://rubygems.org'
+eval_gemfile '../Gemfile'
 
 gem 'rails', github: 'rails/rails'
-
-group :development, :test do
-  gem 'bundler'
-  gem 'rake'
-  gem 'rubocop', '1.59.0', require: false
-  gem 'rubocop-performance', '1.20.1', require: false
-  gem 'rubocop-rspec', '2.25.0', require: false
-end
-
-group :development do
-  gem 'appraisal'
-  gem 'benchmark-ips'
-  gem 'benchmark-memory'
-  gem 'guard'
-  gem 'guard-rspec'
-  gem 'guard-rubocop'
-end
-
-group :test do
-  gem 'rack-contrib', require: false
-  gem 'rack-test', '< 2.1'
-  gem 'rspec', '< 4'
-  gem 'ruby-grape-danger', '~> 0.2.0', require: false
-  gem 'simplecov', '~> 0.21.2'
-  gem 'simplecov-lcov', '~> 0.8.0'
-  gem 'test-prof', require: false
-end
-
-platforms :jruby do
-  gem 'racc'
-end
-
-gemspec path: '../'
diff --git a/spec/grape/api_remount_spec.rb b/spec/grape/api_remount_spec.rb
index 40b5505157..2c6c6ae4bb 100644
--- a/spec/grape/api_remount_spec.rb
+++ b/spec/grape/api_remount_spec.rb
@@ -7,9 +7,7 @@
 
   let(:root_api) { Class.new(described_class) }
 
-  def app
-    root_api
-  end
+  let(:app) { root_api }
 
   describe 'remounting an API' do
     context 'with a defined route' do
@@ -95,7 +93,7 @@ def app
           expect(last_response.body).to eq 'success'
 
           get '/without_conditional/sometimes'
-          expect(last_response.status).to eq 404
+          expect(last_response).to be_not_found
         end
       end
 
@@ -167,18 +165,18 @@ def app
               endpoint: 'test'
             }
             get 'test?another_attr=1'
-            expect(last_response.status).to eq 400
+            expect(last_response).to be_bad_request
             get 'test?my_attr=1'
-            expect(last_response.status).to eq 200
+            expect(last_response).to be_successful
 
             root_api.mount a_remounted_api, with: {
               required_attr_name: 'another_attr',
               endpoint: 'test_b'
             }
             get 'test_b?another_attr=1'
-            expect(last_response.status).to eq 200
+            expect(last_response).to be_successful
             get 'test_b?my_attr=1'
-            expect(last_response.status).to eq 400
+            expect(last_response).to be_bad_request
           end
         end
       end
@@ -264,7 +262,7 @@ def app
           expect(last_response.body).to eq 'success'
 
           get '/different_location'
-          expect(last_response.status).to eq 404
+          expect(last_response).to be_not_found
 
           root_api.mount a_remounted_api, with: { endpoint_name: 'new_location' }
           get '/new_location'
@@ -339,13 +337,13 @@ def app
           expect(last_response.body).to eq 'success'
 
           get '/string/location', param_integer: 1
-          expect(last_response.status).to eq 400
+          expect(last_response).to be_bad_request
 
           get '/integer/location', param_integer: 1
           expect(last_response.body).to eq 'success'
 
           get '/integer/location', param_integer: 'a'
-          expect(last_response.status).to eq 400
+          expect(last_response).to be_bad_request
         end
 
         context 'on dynamic checks' do
@@ -368,7 +366,7 @@ def app
             get '/location', restricted_values: 'sometimes'
             expect(last_response.body).to eq 'success'
             get '/location', restricted_values: 'never'
-            expect(last_response.status).to eq 400
+            expect(last_response).to be_bad_request
           end
         end
       end
@@ -387,13 +385,13 @@ def app
           root_api.mount a_remounted_api, with: { path: 'scores', required_param: 'param_key' }
         end
 
-        it 'will use the dynamic configuration on all routes' do
+        it 'uses the dynamic configuration on all routes' do
           get 'api/votes', param_key: 'a'
           expect(last_response.body).to eql '10 votes'
           get 'api/scores', param_key: 'a'
           expect(last_response.body).to eql '10 votes'
           get 'api/votes'
-          expect(last_response.status).to eq 400
+          expect(last_response).to be_bad_request
         end
       end
 
@@ -480,7 +478,7 @@ def printed_response
           end
         end
 
-        it 'will use the dynamic configuration on all routes' do
+        it 'uses the dynamic configuration on all routes' do
           root_api.mount(a_remounted_api, with: { some_value: 'response value' })
 
           get '/location'
@@ -497,7 +495,7 @@ def printed_response
           end
         end
 
-        it 'will use the dynamic configuration on all routes' do
+        it 'uses the dynamic configuration on all routes' do
           root_api.mount(a_remounted_api, with: { some_value: 'response value' })
 
           get '/location'
diff --git a/spec/grape/api_spec.rb b/spec/grape/api_spec.rb
index fcf66ab635..f8aec1c488 100644
--- a/spec/grape/api_spec.rb
+++ b/spec/grape/api_spec.rb
@@ -4285,12 +4285,12 @@ def uniqe_id_route
 
     it 'returns an error when the id is bad' do
       get '/v1/orders/abc'
-      expect(last_response.body).to be_eql('id is invalid')
+      expect(last_response.body).to eq('id is invalid')
     end
 
     it 'returns the given id when it is valid' do
       get '/v1/orders/1-2'
-      expect(last_response.body).to be_eql('1-2')
+      expect(last_response.body).to eq('1-2')
     end
   end
 
diff --git a/spec/grape/exceptions/validation_errors_spec.rb b/spec/grape/exceptions/validation_errors_spec.rb
index 831ad80d7c..4bba43d657 100644
--- a/spec/grape/exceptions/validation_errors_spec.rb
+++ b/spec/grape/exceptions/validation_errors_spec.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require 'ostruct'
-
 describe Grape::Exceptions::ValidationErrors do
   let(:validation_message) { 'FooBar is invalid' }
   let(:validation_error) { instance_double Grape::Exceptions::Validation, params: [validation_message], message: '' }
@@ -80,7 +78,7 @@ def app
         'exactly_one_of works!'
       end
       get '/exactly_one_of', beer: 'string', wine: 'anotherstring'
-      expect(last_response.status).to eq(400)
+      expect(last_response).to be_bad_request
       expect(JSON.parse(last_response.body)).to eq(
         [
           'params' => %w[beer wine],
diff --git a/spec/grape/middleware/auth/base_spec.rb b/spec/grape/middleware/auth/base_spec.rb
index 1bc888f11e..7ff7d0ad43 100644
--- a/spec/grape/middleware/auth/base_spec.rb
+++ b/spec/grape/middleware/auth/base_spec.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require 'base64'
-
 describe Grape::Middleware::Auth::Base do
   subject do
     Class.new(Grape::API) do
@@ -14,18 +12,16 @@
     end
   end
 
-  def app
-    subject
-  end
+  let(:app) { subject }
 
   it 'authenticates if given valid creds' do
     get '/authorized', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'admin')
-    expect(last_response.status).to eq(200)
+    expect(last_response).to be_successful
     expect(last_response.body).to eq('DONE')
   end
 
   it 'throws a 401 is wrong auth is given' do
     get '/authorized', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'wrong')
-    expect(last_response.status).to eq(401)
+    expect(last_response).to be_unauthorized
   end
 end
diff --git a/spec/grape/middleware/auth/strategies_spec.rb b/spec/grape/middleware/auth/strategies_spec.rb
index f6996695b8..48c62d3d07 100644
--- a/spec/grape/middleware/auth/strategies_spec.rb
+++ b/spec/grape/middleware/auth/strategies_spec.rb
@@ -1,10 +1,8 @@
 # frozen_string_literal: true
 
-require 'base64'
-
 describe Grape::Middleware::Auth::Strategies do
-  context 'Basic Auth' do
-    def app
+  describe 'Basic Auth' do
+    let(:app) do
       proc = ->(u, p) { u && p && u == p }
       Rack::Builder.new do |b|
         b.use Grape::Middleware::Error
@@ -14,19 +12,18 @@ def app
     end
 
     it 'throws a 401 if no auth is given' do
-      @proc = -> { false }
       get '/whatever'
-      expect(last_response.status).to eq(401)
+      expect(last_response).to be_unauthorized
     end
 
     it 'authenticates if given valid creds' do
       get '/whatever', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'admin')
-      expect(last_response.status).to eq(200)
+      expect(last_response).to be_successful
     end
 
     it 'throws a 401 is wrong auth is given' do
       get '/whatever', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'wrong')
-      expect(last_response.status).to eq(401)
+      expect(last_response).to be_unauthorized
     end
   end
 end
diff --git a/spec/support/basic_auth_encode_helpers.rb b/spec/support/basic_auth_encode_helpers.rb
index 00c3c61497..78e21e6c80 100644
--- a/spec/support/basic_auth_encode_helpers.rb
+++ b/spec/support/basic_auth_encode_helpers.rb
@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-require 'base64'
-
 module Spec
   module Support
     module Helpers