No limits when testing.

config/initializers/rack_attack.rb.example

@@ -7,6 +7,9 @@ paths_to_be_protected = [
   "#{Rails.application.config.relative_url_root}/users/sign_in",
   "#{Rails.application.config.relative_url_root}/users"
 ]
-Rack::Attack.throttle('protected paths', limit: 6, period: 60.seconds) do |req|
-  req.ip if paths_to_be_protected.include?(req.path) && req.post?
+
+unless Rails.env.test?
+  Rack::Attack.throttle('protected paths', limit: 6, period: 60.seconds) do |req|
+    req.ip if paths_to_be_protected.include?(req.path) && req.post?
+  end
 end