diff --git a/.github/workflows/rspec.yml b/.github/workflows/rspec.yml
index d986903..3d75f24 100644
--- a/.github/workflows/rspec.yml
+++ b/.github/workflows/rspec.yml
@@ -8,30 +8,121 @@ on:
 
 jobs:
   test:
+    name: "Ruby ${{ matrix.ruby-version }}${{ matrix.rails-version && format(' / Rails {0}', matrix.rails-version) || '' }} / ${{ matrix.adapter-name }}${{ matrix.adapter-version && format(' {0}', matrix.adapter-version) || '' }}"
     runs-on: ubuntu-latest
 
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ["3.2", "3.3", "3.4", "4.0"]
-
-    services:
-      redis:
-        image: redis:7
-        ports:
-          - 6379:6379
-        options: >-
-          --health-cmd "redis-cli ping"
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
+        include:
+          - ruby-version: "3.2"
+            adapter: redis
+            adapter-name: Redis
+          - ruby-version: "3.2"
+            adapter: solid/sqlite3
+            adapter-name: SQLite
+          - ruby-version: "3.3"
+            adapter: redis
+            adapter-name: Redis
+          - ruby-version: "3.3"
+            adapter: solid/sqlite3
+            adapter-name: SQLite
+          - ruby-version: "3.4"
+            adapter: redis
+            adapter-name: Redis
+          - ruby-version: "3.4"
+            adapter: solid/sqlite3
+            adapter-name: SQLite
+
+          # Run tests against all adapters and 2 latest rails majors for latest Ruby version
+          - ruby-version: "4.0"
+            adapter: redis
+            adapter-name: Redis
+          - ruby-version: "4.0"
+            adapter: redis
+            adapter-name: Redis
+            rails-version: "7"
+          - ruby-version: "4.0"
+            adapter: solid/sqlite3
+            adapter-name: SQLite
+          - ruby-version: "4.0"
+            adapter: solid/sqlite3
+            adapter-name: SQLite
+            adapter-version: "1.7"
+            rails-version: "7"
+          - ruby-version: "4.0"
+            adapter: solid/postgresql
+            adapter-name: PostgreSQL
+          - ruby-version: "4.0"
+            adapter: solid/postgresql
+            adapter-name: PostgreSQL
+            rails-version: "7"
+          - ruby-version: "4.0"
+            adapter: solid/mysql2
+            adapter-name: MySQL (mysql2)
+          - ruby-version: "4.0"
+            adapter: solid/mysql2
+            adapter-name: MySQL (mysql2)
+            rails-version: "7"
+          - ruby-version: "4.0"
+            adapter: solid/trilogy
+            adapter-name: "MySQL (trilogy)"
+          - ruby-version: "4.0"
+            adapter: solid/trilogy
+            adapter-name: "MySQL (trilogy)"
+            rails-version: "7"
 
     env:
+      FINO_TEST_ADAPTER: ${{ matrix.adapter }}
       FINO_TEST_REDIS_HOST: localhost
+      FINO_TEST_POSTGRES_HOST: localhost
+      FINO_TEST_POSTGRES_USER: postgres
+      FINO_TEST_POSTGRES_PASSWORD: postgres
+      FINO_TEST_POSTGRES_DB: fino_test
+      FINO_TEST_MYSQL_HOST: 127.0.0.1
+      FINO_TEST_MYSQL_USER: root
+      FINO_TEST_MYSQL_PASSWORD: root
+      FINO_TEST_MYSQL_DB: fino_test
 
     steps:
       - uses: actions/checkout@v4
 
+      - name: Set adapter version override
+        if: matrix.adapter-version
+        run: |
+          GEM_NAME="${FINO_TEST_ADAPTER#solid/}"
+          ENV_NAME="$(echo "${GEM_NAME}" | tr '[:lower:]' '[:upper:]')_VERSION"
+          echo "${ENV_NAME}=${{ matrix.adapter-version }}" >> $GITHUB_ENV
+
+      - name: Set Rails version override
+        if: matrix.rails-version
+        run: echo "RAILS_VERSION=${{ matrix.rails-version }}" >> $GITHUB_ENV
+
+      - name: Start Redis
+        if: matrix.adapter == 'redis'
+        run: |
+          docker run -d --name redis -p 6379:6379 redis:7
+          timeout 30 bash -c 'until docker exec redis redis-cli ping 2>/dev/null; do sleep 1; done'
+
+      - name: Start PostgreSQL
+        if: matrix.adapter == 'solid/postgresql'
+        run: |
+          docker run -d --name postgres -p 5432:5432 \
+            -e POSTGRES_USER=postgres \
+            -e POSTGRES_PASSWORD=postgres \
+            -e POSTGRES_DB=fino_test \
+            postgres:17
+          timeout 30 bash -c 'until docker exec postgres pg_isready 2>/dev/null; do sleep 1; done'
+
+      - name: Start MySQL
+        if: matrix.adapter == 'solid/mysql2' || matrix.adapter == 'solid/trilogy'
+        run: |
+          docker run -d --name mysql -p 3306:3306 \
+            -e MYSQL_ROOT_PASSWORD=root \
+            -e MYSQL_DATABASE=fino_test \
+            mysql:8.4
+          timeout 60 bash -c 'until docker exec mysql mysqladmin ping -h 127.0.0.1 --silent 2>/dev/null; do sleep 1; done'
+
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
diff --git a/Gemfile b/Gemfile
index 505f186..2a90412 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,8 +16,13 @@ gem "guard-livereload"
 gem "rack-livereload"
 
 gem "puma"
-gem "rails", "~> #{ENV['RAILS_VERSION'] || '8.0'}"
-gem "sqlite3", "~> #{ENV['SQLITE_VERSION'] || '2.7'}"
+gem "rails", "~> #{ENV.fetch('RAILS_VERSION', '8.0')}"
+
+# Database adapters
+gem "mysql2", "~> #{ENV.fetch('MYSQL2_VERSION', '0')}"
+gem "pg", "~> #{ENV.fetch('POSTGRESQL_VERSION', '1')}"
+gem "sqlite3", "~> #{ENV.fetch('SQLITE3_VERSION', '2')}"
+gem "trilogy", "~> #{ENV.fetch('TRILOGY_VERSION', '2')}"
 
 gem "rspec", "~> 3.0"
 gem "rubocop", "~> 1.80.1", require: false
diff --git a/fino-rails.gemspec b/fino-rails.gemspec
index 55e9ba5..517d51f 100644
--- a/fino-rails.gemspec
+++ b/fino-rails.gemspec
@@ -29,5 +29,5 @@ Gem::Specification.new do |spec|
   ]
 
   spec.add_dependency "fino", "~> #{Fino::VERSION}"
-  spec.add_dependency "rails", "~> 8.0"
+  spec.add_dependency "rails", ">= 7.0"
 end
diff --git a/fino-solid.gemspec b/fino-solid.gemspec
index 2a62a0b..d3daf4f 100644
--- a/fino-solid.gemspec
+++ b/fino-solid.gemspec
@@ -30,8 +30,4 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "activerecord", ">= 6.1"
   spec.add_dependency "fino", "~> #{Fino::VERSION}"
-
-  spec.add_development_dependency "mysql2", ">= 0.5"
-  spec.add_development_dependency "pg", ">= 1.0"
-  spec.add_development_dependency "sqlite3", ">= 1.4"
 end
diff --git a/lib/fino/solid/adapter.rb b/lib/fino/solid/adapter.rb
index ad15d6d..4ad22f9 100644
--- a/lib/fino/solid/adapter.rb
+++ b/lib/fino/solid/adapter.rb
@@ -37,7 +37,7 @@ def write(setting_definition, value, overrides, variants)
 
         Fino::Solid::Setting.upsert(
           { key: setting_definition.key, data: data },
-          unique_by: :key
+          **unique_by_option(:key)
         )
       end
 
@@ -45,8 +45,8 @@ def read_persisted_setting_keys
         Fino::Solid::Setting.pluck(:key)
       end
 
-      def clear(setting_key)
-        Fino::Solid::Setting.where(key: setting_key).delete_all > 0
+      def clear(setting_key) # rubocop:disable Naming/PredicateMethod
+        Fino::Solid::Setting.where(key: setting_key).delete_all.positive?
       end
 
       def fetch_value_from(raw_adapter_data)
@@ -70,7 +70,7 @@ def record_ab_testing_conversion(setting_definition, variant, scope, time)
             scope: scope.to_s,
             converted_at: time
           },
-          unique_by: :idx_fino_conversions_unique
+          **unique_by_option(:idx_fino_conversions_unique)
         )
       end
 
@@ -101,6 +101,18 @@ def fetch_raw_variants_from(raw_adapter_data)
           memo << { percentage: percentage.to_f, value: value }
         end
       end
+
+      private
+
+      def unique_by_option(constraint)
+        return {} if mysql_adapter?
+
+        { unique_by: constraint }
+      end
+
+      def mysql_adapter?
+        Fino::Solid::Record.connection.adapter_name.match?(/Mysql2|Trilogy/i)
+      end
     end
   end
 end
diff --git a/spec/dummy/.gitignore b/spec/dummy/.gitignore
index 3e5ce68..305ce81 100644
--- a/spec/dummy/.gitignore
+++ b/spec/dummy/.gitignore
@@ -6,3 +6,5 @@
 
 /storage/*
 !/storage/.keep
+
+Gemfile.lock
diff --git a/spec/integration/adapters/redis_adapter_spec.rb b/spec/integration/adapters/redis_adapter_spec.rb
index 5608838..2666116 100644
--- a/spec/integration/adapters/redis_adapter_spec.rb
+++ b/spec/integration/adapters/redis_adapter_spec.rb
@@ -4,6 +4,8 @@
 
 RSpec.describe "Redis adapter integration", type: :integration do
   before(:all) do
+    skip "Redis adapter not under test" unless TestHelpers.redis_adapter?
+
     Fino.reconfigure do
       adapter { TestHelpers.adapter }
       cache { TestHelpers.cache }
diff --git a/spec/integration/adapters/solid_adapter_spec.rb b/spec/integration/adapters/solid_adapter_spec.rb
index cad1568..1da31be 100644
--- a/spec/integration/adapters/solid_adapter_spec.rb
+++ b/spec/integration/adapters/solid_adapter_spec.rb
@@ -4,10 +4,10 @@
 
 RSpec.describe "Solid adapter integration", type: :integration do
   before(:all) do
-    SolidTestHelpers.setup_database(:sqlite3)
+    skip "Solid adapter not under test" unless TestHelpers.solid_adapter?
 
     Fino.reconfigure do
-      adapter { SolidTestHelpers.solid_adapter }
+      adapter { Fino::Solid::Adapter.new }
       cache { TestHelpers.cache }
 
       settings do
@@ -38,16 +38,11 @@
     end
   end
 
-  before do
-    TestHelpers.cache.clear
-    SolidTestHelpers.clear_database
-  end
-
   it_behaves_like "fino adapter integration"
 
   describe "#supports_ab_testing_analysis?" do
     it "returns true" do
-      expect(SolidTestHelpers.solid_adapter.supports_ab_testing_analysis?).to eq(true)
+      expect(Fino::Solid::Adapter.new.supports_ab_testing_analysis?).to eq(true)
     end
   end
 end
diff --git a/spec/support/from_scratch.rb b/spec/support/from_scratch.rb
index 2309828..c331d2f 100644
--- a/spec/support/from_scratch.rb
+++ b/spec/support/from_scratch.rb
@@ -1,8 +1,20 @@
 # frozen_string_literal: true
 
 RSpec.configure do |config|
+  config.before(:suite) do
+    next unless TestHelpers.solid_adapter?
+
+    db_adapter = TestHelpers.adapter_env.delete_prefix("solid/").to_sym
+    SolidTestHelpers.setup_database(db_adapter)
+  end
+
   config.before do
     TestHelpers.cache.clear
-    TestHelpers.redis.flushdb
+
+    if TestHelpers.solid_adapter?
+      SolidTestHelpers.clear_database
+    else
+      TestHelpers.redis.flushdb
+    end
   end
 end
diff --git a/spec/support/solid_test_helpers.rb b/spec/support/solid_test_helpers.rb
index 499ae7e..99fbb43 100644
--- a/spec/support/solid_test_helpers.rb
+++ b/spec/support/solid_test_helpers.rb
@@ -31,6 +31,14 @@ def database_config(adapter_name)
         username: ENV.fetch("FINO_TEST_POSTGRES_USER", "postgres"),
         password: ENV.fetch("FINO_TEST_POSTGRES_PASSWORD", "")
       }
+    when :trilogy
+      {
+        adapter: "trilogy",
+        host: ENV.fetch("FINO_TEST_MYSQL_HOST", "mysql.fino.orb.local"),
+        database: ENV.fetch("FINO_TEST_MYSQL_DB", "fino_test"),
+        username: ENV.fetch("FINO_TEST_MYSQL_USER", "root"),
+        password: ENV.fetch("FINO_TEST_MYSQL_PASSWORD", "")
+      }
     when :mysql2
       {
         adapter: "mysql2",
diff --git a/spec/support/test_helpers.rb b/spec/support/test_helpers.rb
index c52d6c3..cbead89 100644
--- a/spec/support/test_helpers.rb
+++ b/spec/support/test_helpers.rb
@@ -1,8 +1,27 @@
 # frozen_string_literal: true
 
 module TestHelpers
+  VALID_ADAPTERS = %w[redis solid/sqlite3 solid/postgresql solid/mysql2 solid/trilogy].freeze
+  DEFAULT_ADAPTER = "redis"
+
   module_function
 
+  def adapter_env
+    @adapter_env ||= ENV.fetch("FINO_TEST_ADAPTER", DEFAULT_ADAPTER).tap do |value|
+      unless VALID_ADAPTERS.include?(value)
+        raise "Unknown test adapter: #{value}. Valid: #{VALID_ADAPTERS.join(', ')}"
+      end
+    end
+  end
+
+  def redis_adapter?
+    adapter_env == "redis"
+  end
+
+  def solid_adapter?
+    adapter_env.start_with?("solid/")
+  end
+
   def cache
     @cache ||= Fino::Cache::Memory.new(expires_in: 10)
   end
@@ -15,6 +34,10 @@ def redis
   end
 
   def adapter
-    @adapter ||= Fino::Redis::Adapter.new(redis, namespace: "fino_test")
+    @adapter ||= if redis_adapter?
+                   Fino::Redis::Adapter.new(redis, namespace: "fino_test")
+                 elsif solid_adapter?
+                   Fino::Solid::Adapter.new
+                 end
   end
 end