diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f8117e..5371108 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,6 +65,8 @@ jobs:
           gemfile: gemfiles/rails_7_1.gemfile
         - ruby: "3.2"
           gemfile: gemfiles/rails_7_2.gemfile
+        - ruby: "3.2"
+          gemfile: gemfiles/rails_8_0.gemfile
         - ruby: "3.3"
           gemfile: gemfiles/rails_6_0.gemfile
         - ruby: "3.3"
@@ -75,6 +77,16 @@ jobs:
           gemfile: gemfiles/rails_7_1.gemfile
         - ruby: "3.3"
           gemfile: gemfiles/rails_7_2.gemfile
+        - ruby: "3.3"
+          gemfile: gemfiles/rails_8_0.gemfile
+        - ruby: "3.4"
+          gemfile: gemfiles/rails_7_0.gemfile
+        - ruby: "3.4"
+          gemfile: gemfiles/rails_7_1.gemfile
+        - ruby: "3.4"
+          gemfile: gemfiles/rails_7_2.gemfile
+        - ruby: "3.4"
+          gemfile: gemfiles/rails_8_0.gemfile
         - ruby: "head"
           gemfile: gemfiles/rails_head.gemfile
     env:
diff --git a/.gitignore b/.gitignore
index f316c60..9bbefad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.gem
 /test/rails_app/tmp/*
 /test/rails_app/log/*
+/test/rails_app/db/*
 *.sqlite3
 
 Gemfile.lock
diff --git a/derailed_benchmarks.gemspec b/derailed_benchmarks.gemspec
index 358ac4d..6da106d 100644
--- a/derailed_benchmarks.gemspec
+++ b/derailed_benchmarks.gemspec
@@ -51,6 +51,6 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "webrick",  ">= 0"
   gem.add_development_dependency "capybara",  "~> 2"
   gem.add_development_dependency "m"
-  gem.add_development_dependency "rails",     "> 3", "< 7.1"
+  gem.add_development_dependency "rails",     "> 3", "< 8.1"
   gem.add_development_dependency "devise",    "> 3", "< 6"
 end
diff --git a/gemfiles/rails_8_0.gemfile b/gemfiles/rails_8_0.gemfile
new file mode 100644
index 0000000..9d4d0d6
--- /dev/null
+++ b/gemfiles/rails_8_0.gemfile
@@ -0,0 +1,13 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 8.0.0"
+
+group :development, :test do
+  gem "sqlite3", '~> 2.1', platform: [:ruby, :mswin, :mingw]
+  gem "activerecord-jdbcsqlite3-adapter", "~> 1.3.13", platform: :jruby
+  gem "test-unit", "~> 3.0"
+end
+
+gemspec path: "../"
diff --git a/test/integration/tasks_test.rb b/test/integration/tasks_test.rb
index c32911f..1408547 100644
--- a/test/integration/tasks_test.rb
+++ b/test/integration/tasks_test.rb
@@ -127,13 +127,13 @@ def rake(cmd, options = {})
     }
     result = rake "perf:test", env: env
     assert_match 'Endpoint: "foo_secret"', result
-    assert_match (/"Authorization"=>"Basic YWRtaW46c2VjcmV0"/), result
-    assert_match (/"Cache-Control"=>"no-cache"/), result
+    assert_match (/"Authorization"\s?=>\s?"Basic YWRtaW46c2VjcmV0"/), result
+    assert_match (/"Cache-Control"\s?=>\s?"no-cache"/), result
 
     env["USE_SERVER"] = "webrick"
     result = rake "perf:test", env: env
-    assert_match (/"Authorization"=>"Basic YWRtaW46c2VjcmV0"/), result
-    assert_match (/"Cache-Control"=>"no-cache"/), result
+    assert_match (/"Authorization"\s?=>\s?"Basic YWRtaW46c2VjcmV0"/), result
+    assert_match (/"Cache-Control"\s?=>"\s?no-cache"/), result
   end
 
   test 'CONTENT_TYPE' do
@@ -147,12 +147,12 @@ def rake(cmd, options = {})
 
     result = rake "perf:test", env: env
     assert_match 'Body: {"user":{"email":"foo@bar.com","password":"123456","password_confirmation":"123456"}}', result
-    assert_match 'HTTP headers: {"Content-Type"=>"application/json"}', result
+    assert_match(/HTTP headers: {"Content-Type"\s?=>\s?"application\/json"}/, result)
 
     env["USE_SERVER"] = "webrick"
     result = rake "perf:test", env: env
     assert_match 'Body: {"user":{"email":"foo@bar.com","password":"123456","password_confirmation":"123456"}}', result
-    assert_match 'HTTP headers: {"Content-Type"=>"application/json"}', result
+    assert_match(/HTTP headers: {"Content-Type"\s?=>\s?"application\/json"}/, result)
   end
 
   test 'REQUEST_METHOD and REQUEST_BODY' do