diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 0ec878e146..ff59f620e9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -810,7 +810,7 @@ Style/ClassAndModuleChildren:
     - 'lib/open_food_network/locking.rb'
     - 'spec/models/spree/payment_method_spec.rb'
 
-# Offense count: 1
+# Offense count: 2
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: always, always_true, never
@@ -948,13 +948,6 @@ Style/RedundantInitialize:
   Exclude:
     - 'spec/models/spree/gateway_spec.rb'
 
-# Offense count: 2
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Style/RedundantInterpolation:
-  Exclude:
-    - 'lib/tasks/karma.rake'
-    - 'spec/base_spec_helper.rb'
-
 # Offense count: 19
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: AllowedMethods, AllowedPatterns.
diff --git a/lib/tasks/karma.rake b/lib/tasks/karma.rake
index 3ee505f731..0c2183c6e9 100644
--- a/lib/tasks/karma.rake
+++ b/lib/tasks/karma.rake
@@ -39,6 +39,6 @@ namespace :karma do
 
     I18n::JS::DEFAULT_EXPORT_DIR_PATH.replace('tmp/javascripts')
     I18n::JS.export
-    "#{Rails.root.join(I18n::JS::DEFAULT_EXPORT_DIR_PATH, 'translations.js')}"
+    Rails.root.join(I18n::JS::DEFAULT_EXPORT_DIR_PATH, 'translations.js').to_s
   end
 end
diff --git a/spec/base_spec_helper.rb b/spec/base_spec_helper.rb
index fcb68b76d6..8a6e29a22e 100644
--- a/spec/base_spec_helper.rb
+++ b/spec/base_spec_helper.rb
@@ -60,7 +60,7 @@ InvisibleCaptcha.timestamp_enabled = false
 
 RSpec.configure do |config|
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = "#{Rails.root.join('spec/fixtures')}"
+  config.fixture_path = Rails.root.join('spec/fixtures').to_s
 
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false