diff --git a/Rakefile b/Rakefile
index 45904ca2..8b2dcdee 100644
--- a/Rakefile
+++ b/Rakefile
@@ -3,10 +3,22 @@ require "bundler/gem_tasks"
 require "rake/testtask"
 
 desc 'Run tests'
-Rake::TestTask.new(:test) do |t|
+test_task = Rake::TestTask.new(:test) do |t|
   t.libs << 'test'
   t.pattern = 'test/**/*_test.rb'
   t.verbose = true
 end
 
 task default: :test
+
+desc 'Run tests in isolated processes'
+namespace :test do
+  task :isolated do
+    Dir[test_task.pattern].each do |file|
+      cmd = ['ruby']
+      test_task.libs.each { |l| cmd << '-I' << l }
+      cmd << file
+      sh cmd.join(' ')
+    end
+  end
+end