diff --git a/config/environments/production.rb b/config/environments/production.rb
index 3b6f9b56..fca0672b 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -83,7 +83,7 @@ Rails.application.configure do
   config.active_support.deprecation = :notify
 
   # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
+  config.log_formatter = Logger::Formatter.new
 
   # Use a different logger for distributed setups.
   # require 'syslog/logger'
diff --git a/config/environments/staging.rb b/config/environments/staging.rb
index 71ab3707..2e59be8a 100644
--- a/config/environments/staging.rb
+++ b/config/environments/staging.rb
@@ -101,7 +101,7 @@ Rails.application.configure do
   config.active_support.disallowed_deprecation_warnings = []
 
   # Use default logging formatter so that PID and timestamp are not suppressed.
-  config.log_formatter = ::Logger::Formatter.new
+  config.log_formatter = Logger::Formatter.new
 
   # Use a different logger for distributed setups.
   # require 'syslog/logger'
diff --git a/config/initializers/prometheus.rb b/config/initializers/prometheus.rb
index 0820a788..41739c98 100644
--- a/config/initializers/prometheus.rb
+++ b/config/initializers/prometheus.rb
@@ -3,7 +3,7 @@
 require 'code_ocean/config'
 require 'prometheus/record'
 
-return unless CodeOcean::Config.new(:code_ocean).read[:prometheus_exporter][:enabled] && !defined?(::Rails::Console)
+return unless CodeOcean::Config.new(:code_ocean).read[:prometheus_exporter][:enabled] && !defined?(Rails::Console)
 return if %w[db: assets:].any? {|task| Rake.application.top_level_tasks.to_s.include?(task) }
 
 # Add metric callbacks to all models
diff --git a/spec/controllers/sessions_controller_spec.rb b/spec/controllers/sessions_controller_spec.rb
index 1cfe5447..4212ccb5 100644
--- a/spec/controllers/sessions_controller_spec.rb
+++ b/spec/controllers/sessions_controller_spec.rb
@@ -88,7 +88,7 @@ describe SessionsController do
 
       it 'sets the specified locale' do
         expect(controller).to receive(:switch_locale).and_call_original
-        i18n = class_double I18n, locale: locale
+        i18n = class_double(I18n, locale:)
         allow(I18n).to receive(:locale=).with(I18n.default_locale).and_call_original
         allow(I18n).to receive(:locale=).with(locale).and_return(i18n)
         perform_request