diff --git a/.github/workflows/rspec.yml b/.github/workflows/rspec.yml
index 9813e15..5688bb6 100644
--- a/.github/workflows/rspec.yml
+++ b/.github/workflows/rspec.yml
@@ -13,20 +13,33 @@ jobs:
       BUNDLE_JOBS: 4
       BUNDLE_RETRY: 3
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
-      DATABASE_URL: postgres://postgres:postgres@localhost:5432
+      POSTGRES_URL: postgres://postgres:postgres@localhost:5432
+      MYSQL_URL: mysql2://rails:rails@127.0.0.1:3306
+      DB: ${{ matrix.db }}
+      DB_NAME: slotted_counters_test
       CI: true
     strategy:
       fail-fast: false
       matrix:
         ruby: ["3.0"]
         gemfile: ["gemfiles/rails7.gemfile"]
+        db: ["mysql"]
         include:
         - ruby: "2.7"
           gemfile: "gemfiles/rails6.gemfile"
+          db: "postgres"
         - ruby: "3.1"
           gemfile: "gemfiles/railsmaster.gemfile"
+          db: "postgres"
         - ruby: "3.0"
           gemfile: "gemfiles/rails7.gemfile"
+          db: "postgres"
+        - ruby: "2.7"
+          gemfile: "gemfiles/rails6.gemfile"
+          db: "mysql"
+        - ruby: "3.1"
+          gemfile: "gemfiles/railsmaster.gemfile"
+          db: "mysql"
     services:
       postgres:
         image: postgres:14
@@ -38,6 +51,19 @@ jobs:
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
+      mysql:
+        image: mysql:8
+        ports: [ "3306:3306" ]
+        env:
+          MYSQL_PASSWORD: rails
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: slotted_counters_test
+          MYSQL_USER: rails
+        options: >-
+          --health-cmd "mysqladmin ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
     steps:
     - uses: actions/checkout@v3
     - name: Install system deps
diff --git a/gemfiles/rails6.gemfile b/gemfiles/rails6.gemfile
index adfac56..0c57570 100644
--- a/gemfiles/rails6.gemfile
+++ b/gemfiles/rails6.gemfile
@@ -1,5 +1,6 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 6.0"
+gem "mysql2"
 
 gemspec path: ".."
diff --git a/gemfiles/rails7.gemfile b/gemfiles/rails7.gemfile
index 8aebf01..9ef939e 100644
--- a/gemfiles/rails7.gemfile
+++ b/gemfiles/rails7.gemfile
@@ -1,5 +1,6 @@
 source "https://rubygems.org"
 
 gem "rails", "~> 7.0"
+gem "mysql2"
 
 gemspec path: ".."
diff --git a/gemfiles/railsmaster.gemfile b/gemfiles/railsmaster.gemfile
index 46812d4..5efbfc6 100644
--- a/gemfiles/railsmaster.gemfile
+++ b/gemfiles/railsmaster.gemfile
@@ -1,5 +1,6 @@
 source "https://rubygems.org"
 
 gem "rails", github: "rails/rails"
+gem "mysql2"
 
 gemspec path: ".."
diff --git a/spec/support/active_record_init.rb b/spec/support/active_record_init.rb
index 39d2244..8eb4df1 100644
--- a/spec/support/active_record_init.rb
+++ b/spec/support/active_record_init.rb
@@ -1,22 +1,29 @@
 # frozen_string_literal: true
 
-connection_params =
-  if ENV.key?("DATABASE_URL")
-    {"url" => ENV["DATABASE_URL"]}
-  else
-    {
-      "host" => ENV.fetch("DB_HOST", "localhost"),
-      "username" => ENV.fetch("DB_USER", "postgres"),
-      "port" => ENV.fetch("DB_PORT", "9339").to_i
-    }
+DB_CONFIG =
+  if ENV["DB"] == "postgres" || ENV["DB"] == "mysql"
+    require "active_record/database_configurations"
+    url = ENV.fetch("DATABASE_URL") do
+      case ENV["DB"]
+      when "postgres"
+        ENV.fetch("POSTGRES_URL")
+      when "mysql"
+        ENV.fetch("MYSQL_URL")
+      end
+    end
+
+    config = ActiveRecord::DatabaseConfigurations::UrlConfig.new(
+      "test",
+      "primary",
+      url,
+      {"database" => ENV.fetch("DB_NAME", "slotted_counters_test")}
+    )
+    config.respond_to?(:configuration_hash) ? config.configuration_hash : config.config
   end
 
-ActiveRecord::Base.establish_connection(
-  {
-    "adapter" => "postgresql",
-    "database" => "slotted_counters_test"
-  }.merge(connection_params)
-)
+$stdout.puts "⚙️ Using #{DB_CONFIG[:adapter]} adapter for a database"
+
+ActiveRecord::Base.establish_connection(**DB_CONFIG)
 
 ActiveRecord::Schema.define do
   create_table "views", force: :cascade do |t|