diff --git a/features/step_definitions/paperclip_steps.rb b/features/step_definitions/paperclip_steps.rb
new file mode 100644
index 0000000..56d1cc5
--- /dev/null
+++ b/features/step_definitions/paperclip_steps.rb
@@ -0,0 +1,15 @@
+When /^I attach an? "([^\"]*)" file to an? "([^\"]*)" on S3$/ do |filename, klass|
+  filename   = filename.to_sym
+  definition = klass.classify.constantize.attachment_definitions[filename]
+
+  path = "http://s3.amazonaws.com/:id/#{definition[:path]}"
+  path.gsub!(/:([^\/\.]+)/) do |match|
+    "([^\/\.]+)"
+  end
+
+  FakeWeb.register_uri(:put, Regexp.new(path), :body => "OK")
+
+  attach_file filename,
+              "features/support/paperclip/#{klass.underscore}/#{filename}.png"
+end
+
--
libgit2 0.21.2