Implement tagged_logger by hand

lib/rspec/rails/adapters.rb

@@ -184,11 +184,12 @@ def assertion_delegator
 
     # @private
     module TaggedLoggingAdapter
-      require 'active_support/testing/tagged_logging'
-      include ActiveSupport::Testing::TaggedLogging
-
-      # Just a stub as TaggedLogging is calling `name`
-      def name
+      private
+      # Vendored from activesupport/lib/active_support/testing/tagged_logging.rb
+      # This implements the tagged_logger method where it is expected, but
+      # doesn't call `name` or set it up like Rails does.
+      def tagged_logger
+        @tagged_logger ||= (defined?(Rails.logger) && Rails.logger)
       end
     end
   end

spec/rspec/rails/example/rails_example_group_spec.rb

@@ -1,8 +1,7 @@
 module RSpec::Rails
   RSpec.describe RailsExampleGroup do
     if ::Rails::VERSION::MAJOR >= 7
-      it 'includes ActiveSupport::Testing::TaggedLogging' do
-        expect(described_class.include?(::ActiveSupport::Testing::TaggedLogging)).to eq(true)
+      it 'supports tagged_logger' do
         expect(described_class.private_instance_methods).to include(:tagged_logger)
       end
     end