1 files changed, 6 insertions, 0 deletions
diff --git a/activemodel/Rakefile b/activemodel/Rakefile
index 283380db96..ae2fbdb002 100755
--- a/activemodel/Rakefile
+++ b/activemodel/Rakefile
@@ -10,6 +10,12 @@ Rake::TestTask.new do |t|
   t.test_files = Dir.glob("test/cases/**/*_test.rb").sort
   t.verbose = true
 end
+task :isolated_test do
+  ruby = File.join(*RbConfig::CONFIG.values_at('bindir', 'RUBY_INSTALL_NAME'))
+  Dir.glob("test/**/*_test.rb").all? do |file|
+    system(ruby, '-Ilib:test', file)
+  end or raise "Failures"
+end
 
 # Generate the RDoc documentation
 Rake::RDocTask.new do |rdoc|