Rakefile in createsend-5.1.0 vs Rakefile in createsend-5.1.1

- old
+ new

@@ -3,10 +3,10 @@
 require "rake/testtask"
 require "./lib/createsend"
 
 desc "Run tests"
 Rake::TestTask.new(:test) do |test|
-  test.ruby_opts = ["-rubygems"] if defined? Gem
+  test.ruby_opts = ["-rrubygems"] if defined? Gem
   test.libs << "lib" << "test"
   test.pattern = "test/**/*_test.rb"
   puts "running tests."
 end
 