Require 'logger'

Context:

/home/runner/work/active_model_serializers/active_model_serializers/vendor/bundle/ruby/2.6.0/gems/activesupport-6.1.7.10/lib/active_support/logger_thread_safe_level.rb:16:in `<module:LoggerThreadSafeLevel>': uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger (NameError)

rails/rails#54621

Author: wasifhossain

test/support/isolated_unit.rb

@@ -38,6 +38,7 @@
 # It is also good to know what is the bare minimum to get
 # Rails booted up.
 require 'bundler/setup' unless defined?(Bundler)
+require 'logger'
 require 'active_support'
 require 'active_support/core_ext/string/access'
 

test/test_helper.rb

@@ -4,6 +4,7 @@
 ENV['RAILS_ENV'] = 'test'
 require 'bundler/setup'
 
+require 'logger'
 require 'pry'
 require 'timecop'
 require 'rails'