diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index fe22385a7..171a11a0a 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1335,14 +1335,6 @@ Rails/HasManyOrHasOneDependent:
     - 'app/models/user.rb'
     - 'app/models/web/push_subscription.rb'
 
-# Configuration parameters: Include.
-# Include: spec/**/*.rb, test/**/*.rb
-Rails/I18nLocaleAssignment:
-  Exclude:
-    - 'spec/controllers/auth/registrations_controller_spec.rb'
-    - 'spec/helpers/application_helper_spec.rb'
-    - 'spec/requests/localization_spec.rb'
-
 Rails/I18nLocaleTexts:
   Exclude:
     - 'lib/tasks/mastodon.rake'
diff --git a/spec/controllers/auth/registrations_controller_spec.rb b/spec/controllers/auth/registrations_controller_spec.rb
index fffa7e06d..5c422bdff 100644
--- a/spec/controllers/auth/registrations_controller_spec.rb
+++ b/spec/controllers/auth/registrations_controller_spec.rb
@@ -104,9 +104,9 @@ RSpec.describe Auth::RegistrationsController, type: :controller do
     end
 
     around do |example|
-      current_locale = I18n.locale
-      example.run
-      I18n.locale = current_locale
+      I18n.with_locale(I18n.locale) do
+        example.run
+      end
     end
 
     before { request.env['devise.mapping'] = Devise.mappings[:user] }
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index 88751548f..220eb2c80 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -44,30 +44,28 @@ describe ApplicationHelper do
   end
 
   describe 'locale_direction' do
-    around do |example|
-      current_locale = I18n.locale
-      example.run
-      I18n.locale = current_locale
-    end
-
     it 'adds rtl body class if locale is Arabic' do
-      I18n.locale = :ar
-      expect(helper.locale_direction).to eq 'rtl'
+      I18n.with_locale(:ar) do
+        expect(helper.locale_direction).to eq 'rtl'
+      end
     end
 
     it 'adds rtl body class if locale is Farsi' do
-      I18n.locale = :fa
-      expect(helper.locale_direction).to eq 'rtl'
+      I18n.with_locale(:fa) do
+        expect(helper.locale_direction).to eq 'rtl'
+      end
     end
 
     it 'adds rtl if locale is Hebrew' do
-      I18n.locale = :he
-      expect(helper.locale_direction).to eq 'rtl'
+      I18n.with_locale(:he) do
+        expect(helper.locale_direction).to eq 'rtl'
+      end
     end
 
     it 'does not add rtl if locale is Thai' do
-      I18n.locale = :th
-      expect(helper.locale_direction).to_not eq 'rtl'
+      I18n.with_locale(:th) do
+        expect(helper.locale_direction).to_not eq 'rtl'
+      end
     end
   end
 
diff --git a/spec/requests/localization_spec.rb b/spec/requests/localization_spec.rb
index 39eeee5f0..b7fb53ed8 100644
--- a/spec/requests/localization_spec.rb
+++ b/spec/requests/localization_spec.rb
@@ -3,8 +3,10 @@
 require 'rails_helper'
 
 describe 'Localization' do
-  after(:all) do
-    I18n.locale = I18n.default_locale
+  around do |example|
+    I18n.with_locale(I18n.locale) do
+      example.run
+    end
   end
 
   it 'uses a specific region when provided' do