diff --git a/.rubocop.yml b/.rubocop.yml
index 9165e7eba82..17dd3fbeb3f 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -197,6 +197,11 @@ Rails/I18nLocaleAssignment:
   Exclude:
     - "spec/**/*.rb"
 
+Rails/I18nLocaleTexts:
+  Enabled: true
+  Exclude:
+    - "spec/**/*.rb"
+
 # We have config.active_record.belongs_to_required_by_default = false ,
 # which means, we do have to declare presence validators on belongs_to relations.
 Rails/RedundantPresenceValidationOnBelongsTo:
diff --git a/modules/meeting/spec/services/all_meetings/handle_ical_response_service_spec.rb b/modules/meeting/spec/services/all_meetings/handle_ical_response_service_spec.rb
index 669f8a038a9..e68d9d41465 100644
--- a/modules/meeting/spec/services/all_meetings/handle_ical_response_service_spec.rb
+++ b/modules/meeting/spec/services/all_meetings/handle_ical_response_service_spec.rb
@@ -302,7 +302,7 @@ RSpec.describe AllMeetings::HandleICalResponseService, type: :model do
           expect(subject).to be_success
           expect(Rails.logger).to have_received(:warn).with(
             "[iCal Meeting Response] No attendee found for user #{user.mail} " \
-            "in event #{recurring_meeting.uid} with recurrence ID #{recurrence_id.iso8601}"
+            "in event #{recurring_meeting.uid} with recurrence ID #{recurrence_id.utc.strftime('%Y-%m-%dT%H:%M:%S+00:00')}"
           )
         end
       end
diff --git a/spec/controllers/work_package_types/subject_configuration_tab_controller_spec.rb b/spec/controllers/work_package_types/subject_configuration_tab_controller_spec.rb
index ac25c82c22e..e609c40ec8b 100644
--- a/spec/controllers/work_package_types/subject_configuration_tab_controller_spec.rb
+++ b/spec/controllers/work_package_types/subject_configuration_tab_controller_spec.rb
@@ -65,8 +65,8 @@ module WorkPackageTypes
       end
 
       context "if form data is invalid" do
-        let(:form_data) { { subject_configuration: "generated", pattern: nil } }
-        let(:expected_pattern_data) { { subject: { blueprint: "", enabled: true } } }
+        let(:form_data) { { subject_configuration: "generated", pattern: "{{invalid_token}}" } }
+        let(:expected_pattern_data) { { subject: { blueprint: "{{invalid_token}}", enabled: true } } }
         let(:service_result) { ServiceResult.failure }
 
         it "renders the edit template" do
diff --git a/spec/mailers/smtp_settings_spec.rb b/spec/mailers/smtp_settings_spec.rb
index b3d6fc62467..6cf0f6d8889 100644
--- a/spec/mailers/smtp_settings_spec.rb
+++ b/spec/mailers/smtp_settings_spec.rb
@@ -59,9 +59,11 @@ RSpec.describe "SMTP settings" do
   end
 
   def send_mail
-    ActionMailer::Base
-      .mail(from: "test@op.com", to: "foo@bar.com", subject: "Test mail", body: "body")
-      .deliver_now
+    Class.new(ActionMailer::Base) do # rubocop:disable Rails/ApplicationMailer
+      def test_mail
+        mail(from: "test@op.com", to: "foo@bar.com", subject: "Test mail", body: "body")
+      end
+    end.test_mail.deliver_now
   end
 
   describe "enable_starttls_auto" do