diff --git a/ee/app/services/registrations/base_namespace_create_service.rb b/ee/app/services/registrations/base_namespace_create_service.rb
index ec16b500898ed5398b3c8a0f61e5a3869d95239f..17d5ce20a2d68df8537f6e2b5b09398a47c577bb 100644
--- a/ee/app/services/registrations/base_namespace_create_service.rb
+++ b/ee/app/services/registrations/base_namespace_create_service.rb
@@ -19,6 +19,8 @@ def after_successful_group_creation(group_track_action:)
       Gitlab::Tracking.event(self.class.name, group_track_action, namespace: group, user: user)
       ::Onboarding::Progress.onboard(group)
 
+      experiment(:lightweight_trial_registration_redesign, actor: user).track(:assignment, namespace: group)
+
       apply_trial if onboarding_user_status.apply_trial?
     end
 
diff --git a/ee/spec/services/registrations/standard_namespace_create_service_spec.rb b/ee/spec/services/registrations/standard_namespace_create_service_spec.rb
index e2353d31889353e6d785d3b0e0d8238b67f01041..f42a56655da13d3e5ee3654c4c9ee4875bccaab8 100644
--- a/ee/spec/services/registrations/standard_namespace_create_service_spec.rb
+++ b/ee/spec/services/registrations/standard_namespace_create_service_spec.rb
@@ -83,6 +83,26 @@
         )
       end
 
+      context 'with experiment lightweight_trial_registration_redesign' do
+        let(:experiment) { instance_double(ApplicationExperiment) }
+
+        before do
+          allow_next_instance_of(described_class) do |service|
+            allow(service).to receive(:experiment).with(:lightweight_trial_registration_redesign,
+              actor: user).and_return(experiment)
+          end
+        end
+
+        it 'tracks experiment assignment' do
+          allow_next_instance_of(::Projects::CreateService) do |service|
+            allow(service).to receive(:after_create_actions)
+          end
+
+          expect(experiment).to receive(:track).with(:assignment, namespace: an_instance_of(Group))
+          expect(execute).to be_success
+        end
+      end
+
       it 'enqueues a create event worker' do
         expect(Groups::CreateEventWorker).to receive(:perform_async).with(anything, user.id, 'created')