Rakefile in pairing_heap-3.0.1 vs Rakefile in pairing_heap-3.1.0

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
+ENV["MT_NO_PLUGINS"] = "1" # Disable autoloading of MiniTest plugins.
+
 require "bundler/gem_tasks"
 require "rake/testtask"
 require "standard/rake"
 
 Rake::TestTask.new(:test) do |t|