diff --git a/spec/factories/user.rb b/spec/factories/user.rb
index 22b93d2d6..62670188f 100644
--- a/spec/factories/user.rb
+++ b/spec/factories/user.rb
@@ -26,11 +26,5 @@ FactoryBot.define do
     transient do
       old_user_id { SecureRandom.uuid }
     end
-
-    after(:create) do |user, evaluator|
-      FactoryBot.create(:legacy_user, old_user_id: evaluator.old_user_id, user:)
-
-      user.reload
-    end
   end
 end
diff --git a/spec/features/user_spec.rb b/spec/features/user_spec.rb
index e3335c762..169465cb1 100644
--- a/spec/features/user_spec.rb
+++ b/spec/features/user_spec.rb
@@ -594,7 +594,7 @@ RSpec.describe "User Features" do
       end
 
       before do
-        other_user.update!(initial_confirmation_sent: true, last_sign_in_at: nil)
+        other_user.update!(initial_confirmation_sent: true, last_sign_in_at: nil, old_user_id: "old-user-id")
         allow(user).to receive(:need_two_factor_authentication?).and_return(false)
         sign_in(user)
         visit(user_path(other_user))
diff --git a/spec/mailers/resend_invitation_mailer_spec.rb b/spec/mailers/resend_invitation_mailer_spec.rb
index a5eadad20..2b76484c3 100644
--- a/spec/mailers/resend_invitation_mailer_spec.rb
+++ b/spec/mailers/resend_invitation_mailer_spec.rb
@@ -41,6 +41,7 @@ RSpec.describe ResendInvitationMailer do
       end
 
       it "sends an initial invitation" do
+        FactoryBot.create(:legacy_user, old_user_id: new_active_migrated_user.old_user_id, user: new_active_migrated_user)
         expect(notify_client).to receive(:send_email).with(email_address: "new_active_migrated_user@example.com", template_id: User::BETA_ONBOARDING_TEMPLATE_ID, personalisation:).once
         described_class.new.resend_invitation_email(new_active_migrated_user)
       end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 05a581ee8..edb998ac3 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -114,6 +114,7 @@ RSpec.describe User, type: :model do
     end
 
     it "can have one or more legacy users" do
+      FactoryBot.create(:legacy_user, old_user_id: user.old_user_id, user:)
       expect(user.legacy_users.size).to eq(1)
     end
 
diff --git a/spec/requests/organisations_controller_spec.rb b/spec/requests/organisations_controller_spec.rb
index 68f69d9f2..a41db9791 100644
--- a/spec/requests/organisations_controller_spec.rb
+++ b/spec/requests/organisations_controller_spec.rb
@@ -1648,6 +1648,7 @@ RSpec.describe OrganisationsController, type: :request do
             allow(notify_client).to receive(:send_email).and_return(true)
 
             user_to_reactivate = create(:user, :data_coordinator, organisation:, active: false, reactivate_with_organisation: true)
+            FactoryBot.create(:legacy_user, old_user_id: user_to_reactivate.old_user_id, user: user_to_reactivate)
             user_not_to_reactivate = create(:user, :data_coordinator, organisation:, active: false, reactivate_with_organisation: false)
             patch "/organisations/#{organisation.id}", headers:, params:
           end