updates config files

config/environments/test.rb

@@ -10,16 +10,13 @@ Rails.application.configure do
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that
   # preloads Rails for running tests, you may have to set it to true.
-  config.eager_load = true
+  config.eager_load = false
 
-  # Setting allow_corrency to false tells rails to force every request to
-  # "wait in line", serving one after the other
-  # Setting eager_load to true also sets allow_concurrency to true.
-  config.allow_concurrency = false
-
-  # Configure static file server for tests with Cache-Control for performance.
-  config.serve_static_files   = true
-  config.static_cache_control = "public, max-age=3600"
+  # Configure public file server for tests with Cache-Control for performance.
+  config.public_file_server.enabled = true
+  config.public_file_server.headers = {
+    "Cache-Control" => "public, max-age=3600"
+  }
 
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
@@ -30,6 +27,7 @@ Rails.application.configure do
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
+  config.action_mailer.perform_caching = false
 
   # Tell Action Mailer not to deliver emails to the real world.
   # The :test delivery method accumulates sent emails in the