diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index b3a7f2c476..13ca462ab1 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -540,13 +540,6 @@ Style/ArrayIntersect:
     - 'lib/open_food_network/tag_rule_applicator.rb'
     - 'spec/support/matchers/select2_matchers.rb'
 
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: AllowOnConstant, AllowOnSelfClass.
-Style/CaseEquality:
-  Exclude:
-    - 'spec/models/spree/payment_spec.rb'
-
 # Offense count: 23
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
@@ -576,24 +569,6 @@ Style/ClassAndModuleChildren:
     - 'lib/open_food_network/locking.rb'
     - 'spec/models/spree/payment_method_spec.rb'
 
-# Offense count: 1
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: always, always_true, never
-Style/FrozenStringLiteralComment:
-  Exclude:
-    - '.simplecov'
-
-# Offense count: 6
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Style/GlobalStdStream:
-  Exclude:
-    - 'lib/tasks/data.rake'
-    - 'lib/tasks/missing_payments.rake'
-    - 'lib/tasks/sample_data/logging.rb'
-    - 'lib/tasks/subscriptions/debug.rake'
-    - 'lib/tasks/subscriptions/test.rake'
-
 # Offense count: 10
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: AllowSplatArgument.
@@ -684,21 +659,6 @@ Style/OptionalBooleanParameter:
     - 'lib/spree/core/controller_helpers/order.rb'
     - 'spec/support/request/web_helper.rb'
 
-# Offense count: 1
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: short, verbose
-Style/PreferredHashMethods:
-  Exclude:
-    - 'app/controllers/api/v0/shipments_controller.rb'
-
-# Offense count: 1
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: AutoCorrect, AllowComments.
-Style/RedundantInitialize:
-  Exclude:
-    - 'spec/models/spree/gateway_spec.rb'
-
 # Offense count: 19
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: AllowedMethods, AllowedPatterns.
@@ -707,11 +667,3 @@ Style/ReturnNilInPredicateMethodDefinition:
     - 'app/models/order_cycle.rb'
     - 'app/serializers/api/admin/customer_serializer.rb'
     - 'engines/order_management/app/services/order_management/subscriptions/validator.rb'
-
-# Offense count: 3
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Style/SlicingWithRange:
-  Exclude:
-    - 'app/helpers/spree/admin/navigation_helper.rb'
-    - 'app/services/embedded_page_service.rb'
-    - 'engines/order_management/app/services/order_management/subscriptions/validator.rb'
diff --git a/.simplecov b/.simplecov
index 8cf02c6b54..66573a094d 100755
--- a/.simplecov
+++ b/.simplecov
@@ -1,4 +1,5 @@
 #!/bin/env ruby
+# frozen_string_literal: true
 
 SimpleCov.start 'rails' do
   add_filter '/bin/'
diff --git a/app/controllers/api/v0/shipments_controller.rb b/app/controllers/api/v0/shipments_controller.rb
index 1580e1f89f..afaea6a5b2 100644
--- a/app/controllers/api/v0/shipments_controller.rb
+++ b/app/controllers/api/v0/shipments_controller.rb
@@ -117,7 +117,7 @@ module Api
       end
 
       def shipment_params
-        return {} unless params.has_key? :shipment
+        return {} unless params.key? :shipment
 
         params.require(:shipment).permit(:tracking, :selected_shipping_rate_id)
       end
diff --git a/app/helpers/spree/admin/navigation_helper.rb b/app/helpers/spree/admin/navigation_helper.rb
index d39ac5b3cc..7b408e5ef5 100644
--- a/app/helpers/spree/admin/navigation_helper.rb
+++ b/app/helpers/spree/admin/navigation_helper.rb
@@ -122,7 +122,7 @@ module Spree
           end
         else
           if html_options['data-update'].nil? && html_options[:remote]
-            object_name, action = url.split('/')[-2..-1]
+            object_name, action = url.split('/')[-2..]
             html_options['data-update'] = [action, object_name.singularize].join('_')
           end
 
diff --git a/app/services/embedded_page_service.rb b/app/services/embedded_page_service.rb
index 52fc4b98c4..6e979c9722 100644
--- a/app/services/embedded_page_service.rb
+++ b/app/services/embedded_page_service.rb
@@ -81,7 +81,7 @@ class EmbeddedPageService
   def current_referer_without_www
     return unless current_referer
 
-    current_referer.start_with?('www.') ? current_referer[4..-1] : current_referer
+    current_referer.start_with?('www.') ? current_referer[4..] : current_referer
   end
 
   def set_embedded_layout
diff --git a/engines/order_management/app/services/order_management/subscriptions/validator.rb b/engines/order_management/app/services/order_management/subscriptions/validator.rb
index 4808d7353c..1dc04bfd5d 100644
--- a/engines/order_management/app/services/order_management/subscriptions/validator.rb
+++ b/engines/order_management/app/services/order_management/subscriptions/validator.rb
@@ -128,7 +128,7 @@ module OrderManagement
       end
 
       def build_msg_from(key, msg)
-        return msg[1..-1] if msg.starts_with?("^")
+        return msg[1..] if msg.starts_with?("^")
 
         errors.full_message(key, msg)
       end
diff --git a/lib/tasks/data.rake b/lib/tasks/data.rake
index bb26f748b1..8f8a2b0183 100644
--- a/lib/tasks/data.rake
+++ b/lib/tasks/data.rake
@@ -78,11 +78,11 @@ namespace :ofn do
       # Ask how many months back we want to search for
       puts "This task will search order cycle edited within (n) months of today's date.\n" \
            "Please enter a value for (n), or hit ENTER to use the default of three (3) months."
-      input = check_default(STDIN.gets.chomp)
+      input = check_default($stdin.gets.chomp)
 
       while !is_integer?(input)
         puts "'#{input}' is not an integer. Please enter an integer."
-        input = check_default(STDIN.gets.chomp)
+        input = check_default($stdin.gets.chomp)
       end
 
       Integer(input)
diff --git a/lib/tasks/missing_payments.rake b/lib/tasks/missing_payments.rake
index c822b62ee4..9f0982f82d 100644
--- a/lib/tasks/missing_payments.rake
+++ b/lib/tasks/missing_payments.rake
@@ -44,7 +44,7 @@ namespace :ofn do
     details = Psych.load(entry.details)
     out << row(details, details.params)
   rescue StandardError
-    Logger.new(STDERR).warn(entry)
+    Logger.new($stderr).warn(entry)
   end
 
   def headers
diff --git a/lib/tasks/sample_data/logging.rb b/lib/tasks/sample_data/logging.rb
index ad85624092..9204b664be 100644
--- a/lib/tasks/sample_data/logging.rb
+++ b/lib/tasks/sample_data/logging.rb
@@ -4,7 +4,7 @@ module Logging
   private
 
   def log(message)
-    @logger ||= ActiveSupport::TaggedLogging.new(Logger.new(STDOUT))
+    @logger ||= ActiveSupport::TaggedLogging.new(Logger.new($stdout))
     @logger.tagged("ofn:sample_data") { @logger.info(message) }
   end
 end
diff --git a/lib/tasks/subscriptions/debug.rake b/lib/tasks/subscriptions/debug.rake
index 750bfb4d73..bd641ce11f 100644
--- a/lib/tasks/subscriptions/debug.rake
+++ b/lib/tasks/subscriptions/debug.rake
@@ -54,7 +54,7 @@ namespace :ofn do
 
       def request_order_cycle_id
         puts "Please input Order Cycle ID to debug"
-        input = STDIN.gets.chomp
+        input = $stdin.gets.chomp
         exit if input.blank? || !Integer(input)
         Integer(input)
       end
diff --git a/lib/tasks/subscriptions/test.rake b/lib/tasks/subscriptions/test.rake
index ff6317b841..c4349f1b7b 100644
--- a/lib/tasks/subscriptions/test.rake
+++ b/lib/tasks/subscriptions/test.rake
@@ -62,7 +62,7 @@ namespace :ofn do
 
       def request_order_cycle_id
         puts "Please input Order Cycle ID to reset"
-        input = STDIN.gets.chomp
+        input = $stdin.gets.chomp
         exit if input.blank? || !Integer(input)
         Integer(input)
       end
diff --git a/spec/models/spree/gateway_spec.rb b/spec/models/spree/gateway_spec.rb
index 23b0b97d96..b1e0d65205 100644
--- a/spec/models/spree/gateway_spec.rb
+++ b/spec/models/spree/gateway_spec.rb
@@ -7,7 +7,7 @@ RSpec.describe Spree::Gateway do
     Class.new(Spree::Gateway) do
       def provider_class
         Class.new do
-          def initialize(options = {}); end
+          def initialize(*); end
 
           def imaginary_method; end
         end
diff --git a/spec/models/spree/payment_spec.rb b/spec/models/spree/payment_spec.rb
index e22e064b60..1389d62d1a 100644
--- a/spec/models/spree/payment_spec.rb
+++ b/spec/models/spree/payment_spec.rb
@@ -868,7 +868,7 @@ RSpec.describe Spree::Payment do
         let(:payment) { build_stubbed(:payment) }
 
         it "returns the parameter amount when given" do
-          expect(payment.__send__(:calculate_refund_amount, 123)).to be === 123.0
+          expect(payment.__send__(:calculate_refund_amount, 123)).to eq(123)
         end
 
         it "refunds up to the value of the payment when the outstanding balance is larger" do