diff --git a/Gemfile b/Gemfile
index 342f6ec61e..a80dab5fe4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -171,6 +171,7 @@ end
 
 group :test do
   gem 'pdf-reader'
+  gem 'puffing-billy'
   gem 'rails-controller-testing'
   gem 'simplecov', require: false
   gem 'simplecov-lcov', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 321fcbd450..b42743cb50 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -230,6 +230,7 @@ GEM
       ruby-rc4 (>= 0.1.5)
     concurrent-ruby (1.3.1)
     connection_pool (2.4.1)
+    cookiejar (0.3.4)
     crack (1.0.0)
       bigdecimal
       rexml
@@ -269,11 +270,24 @@ GEM
     digest (3.1.1)
     docile (1.4.0)
     dotenv (3.1.2)
+    em-http-request (1.1.7)
+      addressable (>= 2.3.4)
+      cookiejar (!= 0.3.1)
+      em-socksify (>= 0.3)
+      eventmachine (>= 1.0.3)
+      http_parser.rb (>= 0.6.0)
+    em-socksify (0.3.3)
+      base64
+      eventmachine (>= 1.0.0.beta.4)
+    em-synchrony (1.0.6)
+      eventmachine (>= 1.0.0.beta.1)
     email_validator (2.2.4)
       activemodel
     erubi (1.12.0)
     et-orbi (1.2.7)
       tzinfo
+    eventmachine (1.2.7)
+    eventmachine_httpserver (0.2.1)
     excon (0.81.0)
     execjs (2.7.0)
     factory_bot (6.2.0)
@@ -347,6 +361,7 @@ GEM
     hashie (5.0.0)
     highline (2.0.3)
     htmlentities (4.3.4)
+    http_parser.rb (0.8.0)
     i18n (1.14.5)
       concurrent-ruby (~> 1.0)
     i18n-js (3.9.2)
@@ -527,6 +542,14 @@ GEM
     psych (5.1.2)
       stringio
     public_suffix (5.0.5)
+    puffing-billy (4.0.2)
+      addressable (~> 2.5)
+      em-http-request (~> 1.1, >= 1.1.0)
+      em-synchrony
+      eventmachine (~> 1.2)
+      eventmachine_httpserver
+      http_parser.rb (~> 0.8.0)
+      multi_json
     puma (6.5.0)
       nio4r (~> 2.0)
     query_count (1.1.1)
@@ -961,6 +984,7 @@ DEPENDENCIES
   pg (~> 1.2.3)
   private_address_check
   pry (~> 0.13.0)
+  puffing-billy
   puma
   query_count
   rack-mini-profiler (< 3.0.0)