diff --git a/.github/workflows/integration_test.yml b/.github/workflows/integration_test.yml
new file mode 100644
index 0000000..f44c877
--- /dev/null
+++ b/.github/workflows/integration_test.yml
@@ -0,0 +1,69 @@
+name: Integration Test
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+env:
+  RUBY_VERSION: 3.3
+
+jobs:
+  mysql:
+    continue-on-error: true
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./integration_test
+    env:
+      BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
+      MYSQL_HOST: 127.0.0.1
+    strategy:
+      matrix:
+        gemfile:
+          - ar_6.1
+          - ar_7.0
+          - ar_7.1
+    steps:
+      - uses: actions/checkout@v4
+      - name: Start DB
+        run: docker compose up -d mysql
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ env.RUBY_VERSION }}
+      - name: Run bundle install
+        run: bundle install
+      - name: Run integration test
+        run: bundle exec rspec spec/mysql2_spec.rb
+
+  postgresql:
+    continue-on-error: true
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./integration_test
+    env:
+      BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
+      POSTGRES_HOST: 127.0.0.1
+    strategy:
+      matrix:
+        gemfile:
+          - ar_6.1
+          - ar_7.0
+          - ar_7.1
+    steps:
+      - uses: actions/checkout@v4
+      - name: Start DB
+        run: docker compose up -d postgres
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ env.RUBY_VERSION }}
+      - name: Run bundle install
+        run: bundle install
+      - name: Run integration test
+        run: bundle exec rspec spec/postgresql_spec.rb
diff --git a/.gitignore b/.gitignore
index e786654..df4805e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 *.swp
 *.gem
 Gemfile.lock
-gemfiles/*.lock
+*.gemfile.lock
 .bundle/
diff --git a/integration_test/Appraisals b/integration_test/Appraisals
new file mode 120000
index 0000000..526794e
--- /dev/null
+++ b/integration_test/Appraisals
@@ -0,0 +1 @@
+../Appraisals
\ No newline at end of file
diff --git a/integration_test/Gemfile b/integration_test/Gemfile
new file mode 100644
index 0000000..7577434
--- /dev/null
+++ b/integration_test/Gemfile
@@ -0,0 +1,7 @@
+source 'https://rubygems.org'
+
+gem 'arproxy', path: '..'
+gem 'rspec'
+gem 'appraisal'
+gem 'mysql2'
+gem 'pg'
diff --git a/integration_test/docker-compose.yml b/integration_test/docker-compose.yml
new file mode 100644
index 0000000..18ccaeb
--- /dev/null
+++ b/integration_test/docker-compose.yml
@@ -0,0 +1,23 @@
+version: '3'
+
+services:
+  mysql:
+    image: mysql:9.0
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: rootpassword
+      MYSQL_DATABASE: arproxy_test
+      MYSQL_USER: arproxy
+      MYSQL_PASSWORD: password
+    ports:
+      - "23306:3306"
+
+  postgres:
+    image: postgres:16
+    restart: always
+    environment:
+      POSTGRES_DB: arproxy_test
+      POSTGRES_USER: arproxy
+      POSTGRES_PASSWORD: password
+    ports:
+      - "25432:5432"
diff --git a/integration_test/gemfiles/ar_6.1.gemfile b/integration_test/gemfiles/ar_6.1.gemfile
new file mode 100644
index 0000000..24d1563
--- /dev/null
+++ b/integration_test/gemfiles/ar_6.1.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "arproxy", path: "../.."
+gem "rspec"
+gem "appraisal"
+gem "mysql2"
+gem "pg"
+gem "activerecord", "~> 6.1.0"
diff --git a/integration_test/gemfiles/ar_7.0.gemfile b/integration_test/gemfiles/ar_7.0.gemfile
new file mode 100644
index 0000000..72e4b83
--- /dev/null
+++ b/integration_test/gemfiles/ar_7.0.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "arproxy", path: "../.."
+gem "rspec"
+gem "appraisal"
+gem "mysql2"
+gem "pg"
+gem "activerecord", "~> 7.0.0"
diff --git a/integration_test/gemfiles/ar_7.1.gemfile b/integration_test/gemfiles/ar_7.1.gemfile
new file mode 100644
index 0000000..5273122
--- /dev/null
+++ b/integration_test/gemfiles/ar_7.1.gemfile
@@ -0,0 +1,10 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "arproxy", path: "../.."
+gem "rspec"
+gem "appraisal"
+gem "mysql2"
+gem "pg"
+gem "activerecord", "~> 7.1.0"
diff --git a/integration_test/spec/mysql2_spec.rb b/integration_test/spec/mysql2_spec.rb
new file mode 100644
index 0000000..d5dca8a
--- /dev/null
+++ b/integration_test/spec/mysql2_spec.rb
@@ -0,0 +1,52 @@
+require_relative 'spec_helper'
+require 'mysql2'
+
+context 'MySQL' do
+  before(:all) do
+    ActiveRecord::Base.establish_connection(
+      adapter: 'mysql2',
+      host: ENV.fetch('MYSQL_HOST', '127.0.0.1'),
+      port: ENV.fetch('MYSQL_PORT', '23306').to_i,
+      database: 'arproxy_test',
+      username: 'arproxy',
+      password: 'password'
+    )
+
+    Arproxy.configure do |config|
+      config.adapter = 'mysql2'
+      config.use HelloProxy
+      config.use QueryLogger
+    end
+    Arproxy.enable!
+
+    ActiveRecord::Base.connection.create_table :products, force: true do |t|
+      t.string :name
+      t.integer :price
+    end
+
+    Product.create(name: 'apple', price: 100)
+    Product.create(name: 'banana', price: 200)
+    Product.create(name: 'orange', price: 300)
+  end
+
+  after(:all) do
+    ActiveRecord::Base.connection.drop_table :products
+    ActiveRecord::Base.connection.close
+    Arproxy.disable!
+  end
+
+  before(:each) do
+    QueryLogger.reset!
+  end
+
+  it do
+    expect(QueryLogger.log.size).to eq(0)
+
+    expect(Product.count).to eq(3)
+    expect(Product.first.name).to eq('apple')
+
+    expect(QueryLogger.log.size).to eq(2)
+    expect(QueryLogger.log[0]).to eq('SELECT COUNT(*) FROM `products` -- Hello Arproxy!')
+    expect(QueryLogger.log[1]).to eq('SELECT `products`.* FROM `products` ORDER BY `products`.`id` ASC LIMIT 1 -- Hello Arproxy!')
+  end
+end
diff --git a/integration_test/spec/postgresql_spec.rb b/integration_test/spec/postgresql_spec.rb
new file mode 100644
index 0000000..737fe39
--- /dev/null
+++ b/integration_test/spec/postgresql_spec.rb
@@ -0,0 +1,52 @@
+require_relative 'spec_helper'
+require 'pg'
+
+context 'PostgreSQL' do
+  before(:all) do
+    ActiveRecord::Base.establish_connection(
+      adapter: 'postgresql',
+      host: ENV.fetch('POSTGRES_HOST', '127.0.0.1'),
+      port: ENV.fetch('POSTGRES_PORT', '25432').to_i,
+      database: 'arproxy_test',
+      username: 'arproxy',
+      password: 'password'
+    )
+
+    Arproxy.configure do |config|
+      config.adapter = 'postgresql'
+      config.use HelloProxy
+      config.use QueryLogger
+    end
+    Arproxy.enable!
+
+    ActiveRecord::Base.connection.create_table :products, force: true do |t|
+      t.string :name
+      t.integer :price
+    end
+
+    Product.create(name: 'apple', price: 100)
+    Product.create(name: 'banana', price: 200)
+    Product.create(name: 'orange', price: 300)
+  end
+
+  after(:all) do
+    ActiveRecord::Base.connection.drop_table :products
+    ActiveRecord::Base.connection.close
+    Arproxy.disable!
+  end
+
+  before(:each) do
+    QueryLogger.reset!
+  end
+
+  it do
+    expect(QueryLogger.log.size).to eq(0)
+
+    expect(Product.count).to eq(3)
+    expect(Product.first.name).to eq('apple')
+
+    expect(QueryLogger.log.size).to eq(2)
+    expect(QueryLogger.log[0]).to eq('SELECT COUNT(*) FROM `products` -- Hello Arproxy!')
+    expect(QueryLogger.log[1]).to eq('SELECT `products`.* FROM `products` ORDER BY `products`.`id` ASC LIMIT 1 -- Hello Arproxy!')
+  end
+end
diff --git a/integration_test/spec/spec_helper.rb b/integration_test/spec/spec_helper.rb
new file mode 100644
index 0000000..869dec6
--- /dev/null
+++ b/integration_test/spec/spec_helper.rb
@@ -0,0 +1,28 @@
+require 'arproxy'
+require 'active_record'
+
+class Product < ActiveRecord::Base
+end
+
+class QueryLogger < Arproxy::Base
+  def execute(sql, name = nil)
+    @@log ||= []
+    @@log << sql
+    puts "QueryLogger: #{sql}"
+    super
+  end
+
+  def self.log
+    @@log
+  end
+
+  def self.reset!
+    @@log = []
+  end
+end
+
+class HelloProxy < Arproxy::Base
+  def execute(sql, name = nil)
+    super("#{sql} -- Hello Arproxy!", name)
+  end
+end