switch to minitest, see how it goes

Rakefile

@@ -1,6 +1,8 @@
 require 'bundler/gem_tasks'
-require 'rspec/core/rake_task'
+require 'rake/testtask'
 
-RSpec::Core::RakeTask.new(:spec)
+Rake::TestTask.new do |task|
+  task.libs << 'test'
+end
 
-task :default => :spec
+task :default => :test

omniauth-facebook.gemspec

@@ -17,6 +17,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency 'omniauth-oauth2', '~> 1.0.2'
 
-  s.add_development_dependency 'rspec', '~> 2'
+  s.add_development_dependency 'minitest'
+  s.add_development_dependency 'mocha'
   s.add_development_dependency 'rake'
 end