diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f9942d6d..f852fc164 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,6 +45,8 @@ jobs:
             version: '6.0'
           - name: 'active_record'
             version: '6.1'
+          - name: 'active_record'
+            version: '7.0'
           - name: 'sequel'
             version: '5'
         experimental: [false]
@@ -66,7 +68,7 @@ jobs:
             feature: 'rails'
             orm:
               name: 'active_record'
-              version: '6.1'
+              version: '7.0'
             database: 'sqlite3'
             experimental: false
           - ruby: '3.0'
@@ -80,27 +82,27 @@ jobs:
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
           - ruby: '3.0'
             database: 'mysql'
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
           - ruby: '3.0'
             database: 'postgres'
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
           - ruby: '2.7'
             feature: 'rails'
             orm:
               name: 'active_record'
-              version: '6.1'
+              version: '7.0'
             database: 'sqlite3'
             experimental: false
           - ruby: '2.7'
@@ -114,23 +116,27 @@ jobs:
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
           - ruby: '2.7'
             database: 'mysql'
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
           - ruby: '2.7'
             database: 'postgres'
             feature: 'unit'
             orm:
               name: 'active_record'
-              version: '7.0'
+              version: 'edge'
             experimental: true
         exclude:
+          - ruby: '2.6'
+            orm:
+              name: 'active_record'
+              version: '7.0'
           - ruby: '2.7'
             orm:
               name: 'active_record'
@@ -188,9 +194,6 @@ jobs:
       - name: Install Postgres
         run: sudo apt-get install libpq-dev postgresql-client -y
         if: matrix.database == 'postgres'
-      - name: Install MySQL
-        run: sudo apt-get install libmysqlclient-dev mysql-client -y
-        if: matrix.database == 'mysql'
       - id: cache-bundler
         uses: actions/cache@v2
         with:
diff --git a/Gemfile b/Gemfile
index cac693c84..68f2ded9b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,11 +8,11 @@ orm, orm_version = ENV['ORM'], ENV['ORM_VERSION']
 group :development, :test do
   case orm
   when 'active_record'
-    orm_version ||= '6.1'
+    orm_version ||= '7.0'
     case orm_version
-    when '4.2', '5.0', '5.1', '5.2', '6.0', '6.1'
+    when '4.2', '5.0', '5.1', '5.2', '6.0', '6.1', '7.0'
       gem 'activerecord', "~> #{orm_version}.0"
-    when '7.0'
+    when 'edge'
       git 'https://github.com/rails/rails.git', branch: 'main' do
         gem 'activerecord'
         gem 'activesupport'
diff --git a/lib/mobility/plugins/active_model/dirty.rb b/lib/mobility/plugins/active_model/dirty.rb
index 30bd26fc7..3cd13a79b 100644
--- a/lib/mobility/plugins/active_model/dirty.rb
+++ b/lib/mobility/plugins/active_model/dirty.rb
@@ -153,7 +153,13 @@ def #{method_name}(attr_name, *rest#{kwargs})
           # suffixes is simplest given they change from Rails version to version.
           def patterns
             @patterns ||=
-              (klass.attribute_method_matchers.map { |p| "#{p.prefix}%s#{p.suffix}" } - excluded_patterns)
+              begin
+                # Method name changes in Rails 7.1
+                attribute_method_patterns = klass.respond_to?(:attribute_method_patterns) ?
+                  klass.attribute_method_patterns :
+                  klass.attribute_method_matchers
+                attribute_method_patterns.map { |p| "#{p.prefix}%s#{p.suffix}" } - excluded_patterns
+              end
           end
 
           private