diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b2e0692..3ba0385 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,8 +21,11 @@ jobs:
           - gemfiles/rails_5_2.gemfile
           - gemfiles/rails_6_0.gemfile
           - gemfiles/rails_6_1.gemfile
+          - gemfiles/rails_7_0.gemfile
           - gemfiles/rails_head.gemfile
         exclude:
+          - ruby: "2.5.8"
+            gemfile: gemfiles/rails_7_0.gemfile
           - ruby: "2.5.8"
             gemfile: gemfiles/rails_head.gemfile
           - ruby: "2.7.2"
@@ -58,4 +61,4 @@ jobs:
           git config --global user.email "user@example.com"
           git config --global user.name "Github Action Bot"
       - name: Run test
-        run: bundle exec rake test
\ No newline at end of file
+        run: bundle exec rake test
diff --git a/Appraisals b/Appraisals
new file mode 100644
index 0000000..343f700
--- /dev/null
+++ b/Appraisals
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+appraise 'rails_5_1' do
+  gem 'rails', '~> 5.1.0'
+end
+
+appraise 'rails_5_2' do
+  gem 'rails', '~> 5.2.0'
+end
+
+appraise 'rails_6_0' do
+  gem 'rails', '~> 6.0.0'
+end
+
+appraise 'rails_6_1' do
+  gem 'rails', '~> 6.1.0'
+
+  # https://stackoverflow.com/questions/70500220/rails-7-ruby-3-1-loaderror-cannot-load-such-file-net-smtp
+  gem 'net-smtp', require: false
+  gem 'net-imap', require: false
+  gem 'net-pop', require: false
+end
+
+appraise 'rails_7_0' do
+  gem 'rails', '~> 7.0'
+end
diff --git a/derailed_benchmarks.gemspec b/derailed_benchmarks.gemspec
index ee2748a..ba3ebb6 100644
--- a/derailed_benchmarks.gemspec
+++ b/derailed_benchmarks.gemspec
@@ -34,6 +34,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency "dead_end",        ">= 0"
   gem.add_dependency "rack-test",       ">= 0"
 
+  gem.add_development_dependency "appraisal"
   gem.add_development_dependency "webrick",  ">= 0"
   gem.add_development_dependency "capybara",  "~> 2"
   gem.add_development_dependency "m"
diff --git a/gemfiles/rails_5_1.gemfile b/gemfiles/rails_5_1.gemfile
index 645ebf2..cbfac1c 100644
--- a/gemfiles/rails_5_1.gemfile
+++ b/gemfiles/rails_5_1.gemfile
@@ -1,12 +1,8 @@
-# frozen_string_literal: true
-
-#  BUNDLE_GEMFILE="gemfiles/rails_5_1.gemfile" bundle exec m test/integration/tasks_test.rb:30
-#
 # This file was generated by Appraisal
 
 source "https://rubygems.org"
 
-gem "rails", "~> 5.1.7"
+gem "rails", "~> 5.1.0"
 
 group :development, :test do
   gem "sqlite3", platform: [:ruby, :mswin, :mingw]
diff --git a/gemfiles/rails_5_2.gemfile b/gemfiles/rails_5_2.gemfile
index eb20523..39c9942 100644
--- a/gemfiles/rails_5_2.gemfile
+++ b/gemfiles/rails_5_2.gemfile
@@ -1,10 +1,8 @@
 # This file was generated by Appraisal
-#
-# BUNDLE_GEMFILE="gemfiles/rails_5_2.gemfile" bundle exec m test/integration/tasks_test.rb:30
 
 source "https://rubygems.org"
 
-gem "rails", "~> 5.2.4.4"
+gem "rails", "~> 5.2.0"
 
 group :development, :test do
   gem "sqlite3", platform: [:ruby, :mswin, :mingw]
diff --git a/gemfiles/rails_6_0.gemfile b/gemfiles/rails_6_0.gemfile
index ee2b2ce..ebadaec 100644
--- a/gemfiles/rails_6_0.gemfile
+++ b/gemfiles/rails_6_0.gemfile
@@ -1,10 +1,8 @@
-# frozen_string_literal: true
-
 # This file was generated by Appraisal
 
 source "https://rubygems.org"
 
-gem "rails", "6.0.5"
+gem "rails", "~> 6.0.0"
 
 group :development, :test do
   gem "sqlite3", platform: [:ruby, :mswin, :mingw]
diff --git a/gemfiles/rails_6_1.gemfile b/gemfiles/rails_6_1.gemfile
index d51e96f..0535ff7 100644
--- a/gemfiles/rails_6_1.gemfile
+++ b/gemfiles/rails_6_1.gemfile
@@ -2,12 +2,10 @@
 
 source "https://rubygems.org"
 
-gem "rails", "~> 6.1.1"
-
-# https://stackoverflow.com/questions/70500220/rails-7-ruby-3-1-loaderror-cannot-load-such-file-net-smtp
-gem 'net-smtp', require: false
-gem 'net-imap', require: false
-gem 'net-pop', require: false
+gem "rails", "~> 6.1.0"
+gem "net-smtp", require: false
+gem "net-imap", require: false
+gem "net-pop", require: false
 
 group :development, :test do
   gem "sqlite3", platform: [:ruby, :mswin, :mingw]
diff --git a/gemfiles/rails_7_0.gemfile b/gemfiles/rails_7_0.gemfile
new file mode 100644
index 0000000..642d3e2
--- /dev/null
+++ b/gemfiles/rails_7_0.gemfile
@@ -0,0 +1,13 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 7.0"
+
+group :development, :test do
+  gem "sqlite3", platform: [:ruby, :mswin, :mingw]
+  gem "activerecord-jdbcsqlite3-adapter", "~> 1.3.13", platform: :jruby
+  gem "test-unit", "~> 3.0"
+end
+
+gemspec path: "../"