diff --git a/Rakefile b/Rakefile
index 9a36334..7723dfb 100644
--- a/Rakefile
+++ b/Rakefile
@@ -9,3 +9,6 @@ desc "Run all specs in spec directory (excluding plugin specs)"
 RSpec::Core::RakeTask.new(:spec => 'app:db:test:prepare')
 
 task :default => :spec
+
+# To test against a specific version of Rails
+# export RAILS_VERSION=3.2.0; bundle update; rake