diff --git a/spec/lib/tasks/dupicate_rent_periods_spec.rb b/spec/lib/tasks/dupicate_rent_periods_spec.rb
index 6476b7b2b..d3bbe1013 100644
--- a/spec/lib/tasks/dupicate_rent_periods_spec.rb
+++ b/spec/lib/tasks/dupicate_rent_periods_spec.rb
@@ -6,12 +6,11 @@ RSpec.describe "duplicate_rent_periods" do
     Rake.application.rake_require("tasks/duplicate_rent_periods")
     Rake::Task.define_task(:environment)
     allow(Rails.logger).to receive(:info)
-    organisation = create(:organisation, rent_periods: (1..11).to_a)
+    organisation = create(:organisation, rent_periods: (2..11).to_a)
 
-    [2, 4, 6, 11].each do |rent_period|
-      org_rent_period = build(:organisation_rent_period, organisation:)
+    [2, 4, 6, 11, 2, 11, 11].each do |rent_period|
+      org_rent_period = build(:organisation_rent_period, organisation:, rent_period:)
       org_rent_period.save!(validate: false)
-      org_rent_period.update_column(:rent_period, rent_period)
     end
   end
 
@@ -25,9 +24,9 @@ RSpec.describe "duplicate_rent_periods" do
     it "logs the correct information about duplicate rent periods" do
       task.invoke
 
-      expect(Rails.logger).to have_received(:info).with(include("Total number of records: 15"))
-      expect(Rails.logger).to have_received(:info).with(include("Number of affected records: 8"))
-      expect(Rails.logger).to have_received(:info).with(include("Number of records to delete: 4"))
+      expect(Rails.logger).to have_received(:info).with(include("Total number of records: 17"))
+      expect(Rails.logger).to have_received(:info).with(include("Number of affected records: 11"))
+      expect(Rails.logger).to have_received(:info).with(include("Number of records to delete: 7"))
       expect(Rails.logger).to have_received(:info).with(include("Number of records to keep: 4"))
     end
   end
@@ -40,8 +39,11 @@ RSpec.describe "duplicate_rent_periods" do
     end
 
     it "deletes redundant rent periods" do
-      expect { task.invoke }.to change(OrganisationRentPeriod, :count).by(-4)
-      expect(Rails.logger).to have_received(:info).with(include("Number of deleted duplicate records: 4"))
+      expect { task.invoke }.to change(OrganisationRentPeriod, :count).by(-7)
+      expect(Rails.logger).to have_received(:info).with(include("Number of deleted duplicate records: 7"))
+
+      remaining_rent_periods = OrganisationRentPeriod.pluck(:rent_period)
+      expect(remaining_rent_periods).to match_array((2..11).to_a)
     end
   end
 end