diff --git a/fake_braintree.gemspec b/fake_braintree.gemspec
index bcd79ca..78a74d7 100644
--- a/fake_braintree.gemspec
+++ b/fake_braintree.gemspec
@@ -26,4 +26,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec', '~> 2.6.0'
   s.add_development_dependency 'mocha', '~> 0.9.12'
   s.add_development_dependency 'timecop', '~> 0.3.5'
+  s.add_development_dependency 'spork', '~> 0.9.0.rc9'
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 2541d25..9a66dae 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,19 +1,26 @@
-# Requires supporting ruby files with custom matchers and macros, etc,
-# in spec/support/ and its subdirectories.
-require 'rspec'
-require 'fake_braintree'
-require 'timecop'
-Dir[File.join(File.dirname(__FILE__), "support/**/*.rb")].each {|f| require f}
+require 'spork'
 
-Dir.mkdir('tmp') unless Dir.exist?('tmp')
-File.new('tmp/braintree_log', 'w').close
+Spork.prefork do
+  # Requires supporting ruby files with custom matchers and macros, etc,
+  # in spec/support/ and its subdirectories.
+  require 'rspec'
+  require 'fake_braintree'
+  require 'timecop'
+  Dir[File.join(File.dirname(__FILE__), "support/**/*.rb")].each {|f| require f}
 
-TEST_CC_NUMBER = %w(4111 1111 1111 1111).join
+  Dir.mkdir('tmp') unless Dir.exist?('tmp')
+  File.new('tmp/braintree_log', 'w').close
 
-RSpec.configure do |config|
-  config.mock_with :mocha
+  TEST_CC_NUMBER = %w(4111 1111 1111 1111).join
 
-  config.include BraintreeHelpers
+  RSpec.configure do |config|
+    config.mock_with :mocha
 
-  config.before { FakeBraintree.clear! }
+    config.include BraintreeHelpers
+
+    config.before { FakeBraintree.clear! }
+  end
+end
+
+Spork.each_run do
 end