diff --git a/config/environments/development.rb b/config/environments/development.rb
index 74f0913da2..f5f22a3c1f 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -16,7 +16,7 @@ Rails.application.configure do
   # Show full error reports.
   config.consider_all_requests_local = true
 
-  # Enable server timing
+  # Enable server timing.
   config.server_timing = true
 
   # Enable/disable caching. By default caching is disabled.
@@ -77,9 +77,6 @@ Rails.application.configure do
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
 
-  # Uncomment if you wish to allow Action Cable access from any origin.
-  # config.action_cable.disable_request_forgery_protection = true
-
   config.action_mailer.default_options = { from: 'notifications@localhost' }
 
   # If using a Heroku, Vagrant or generic remote development environment,
@@ -90,7 +87,7 @@ Rails.application.configure do
   # TODO: Remove once devise-two-factor data migration complete
   config.x.otp_secret = ENV.fetch('OTP_SECRET', '1fc2b87989afa6351912abeebe31ffc5c476ead9bf8b3d74cbc4a302c7b69a45b40b1bbef3506ddad73e942e15ed5ca4b402bf9a66423626051104f4b5f05109')
 
-  # Raise error when a before_action's only/except options reference missing actions
+  # Raise error when a before_action's only/except options reference missing actions.
   config.action_controller.raise_on_missing_callback_actions = true
 end
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 5129b73e41..1cf752f3b2 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -15,17 +15,14 @@ Rails.application.configure do
   config.eager_load = true
 
   # Full error reports are disabled and caching is turned on.
-  config.consider_all_requests_local       = false
+  config.consider_all_requests_local = false
   config.action_controller.perform_caching = true
-  config.action_controller.asset_host      = ENV['CDN_HOST'] if ENV['CDN_HOST'].present?
+  config.action_controller.asset_host = ENV['CDN_HOST'] if ENV['CDN_HOST'].present?
 
   # Ensures that a master key has been made available in ENV["RAILS_MASTER_KEY"], config/master.key, or an environment
   # key such as config/credentials/production.key. This key is used to decrypt credentials (and other encrypted files).
   # config.require_master_key = true
 
-  # Compress CSS using a preprocessor.
-  # config.assets.css_compressor = :sass
-
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
@@ -42,6 +39,7 @@ Rails.application.configure do
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   config.force_ssl = true
+  # Skip http-to-https redirect for the default health check endpoint.
   config.ssl_options = {
     redirect: {
       exclude: ->(request) { request.path.start_with?('/health') || request.headers['Host'].end_with?('.onion') || request.headers['Host'].end_with?('.i2p') },
@@ -60,7 +58,7 @@ Rails.application.configure do
   config.cache_store = :redis_cache_store, REDIS_CONFIGURATION.cache
 
   # Use a real queuing backend for Active Job (and separate queues per environment).
-  # config.active_job.queue_adapter     = :resque
+  # config.active_job.queue_adapter = :resque
   # config.active_job.queue_name_prefix = "mastodon_production"
 
   config.action_mailer.perform_caching = false
@@ -70,7 +68,7 @@ Rails.application.configure do
   # config.action_mailer.raise_delivery_errors = false
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # English when a translation cannot be found).
+  # the I18n.default_locale when a translation cannot be found).
   # This setting would typically be `true` to use the `I18n.default_locale`.
   # Some locales are missing translation entries and would have errors:
   # https://github.com/mastodon/mastodon/pull/24727
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 716bf8d31f..eb29ab1e17 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -22,11 +22,11 @@ Rails.application.configure do
   config.assets_digest = false
 
   # Show full error reports and disable caching.
-  config.consider_all_requests_local       = true
+  config.consider_all_requests_local = true
   config.action_controller.perform_caching = false
   config.cache_store = :memory_store
 
-  # Raise exceptions instead of rendering exception templates.
+  # Render exception templates for rescuable exceptions and raise for other exceptions.
   config.action_dispatch.show_exceptions = :rescuable
 
   # Disable request forgery protection in test environment.
@@ -70,7 +70,7 @@ Rails.application.configure do
   # Annotate rendered view with file names.
   # config.action_view.annotate_rendered_view_with_filenames = true
 
-  # Raise error when a before_action's only/except options reference missing actions
+  # Raise error when a before_action's only/except options reference missing actions.
   config.action_controller.raise_on_missing_callback_actions = true
 end