diff --git a/app/assets/stylesheets/_uswds.scss b/app/assets/stylesheets/_uswds.scss
index 352c195e5f7..5964271ffd8 100644
--- a/app/assets/stylesheets/_uswds.scss
+++ b/app/assets/stylesheets/_uswds.scss
@@ -6,7 +6,6 @@
 @forward 'usa-alert';
 @forward 'usa-banner';
 @forward 'usa-button';
-@forward 'usa-button-group';
 @forward 'usa-collection';
 @forward 'usa-form';
 @forward 'usa-header';
diff --git a/app/assets/stylesheets/utilities/_typography.scss b/app/assets/stylesheets/utilities/_typography.scss
index 3b52fa8b0f4..5db68043ba7 100644
--- a/app/assets/stylesheets/utilities/_typography.scss
+++ b/app/assets/stylesheets/utilities/_typography.scss
@@ -99,28 +99,3 @@ h6,
 .h6 {
   @extend %h6;
 }
-
-.separator-text {
-  display: flex;
-  align-items: center;
-  text-align: center;
-  font-size: 1.125rem;
-  margin-bottom: 16px;
-
-  &::before,
-  &::after {
-    content: '';
-    display: block;
-    border-bottom: 1px solid color('primary-light');
-    flex-grow: 1;
-    min-width: 2rem;
-  }
-
-  &::before {
-    margin-right: 1rem;
-  }
-
-  &::after {
-    margin-left: 1rem;
-  }
-}
diff --git a/app/components/tab_navigation_component.html.erb b/app/components/tab_navigation_component.html.erb
index c9a89a8598a..005bebd90f8 100644
--- a/app/components/tab_navigation_component.html.erb
+++ b/app/components/tab_navigation_component.html.erb
@@ -1,13 +1,12 @@
-<%= content_tag(:nav, aria: { label: }, **tag_options) do %>
+<%= content_tag(:nav, aria: { label: }, **tag_options, class: [*tag_options[:class], 'tab-navigation']) do %>
   <ul class="usa-button-group usa-button-group--segmented">
     <% routes.each do |route| %>
-      <li class="usa-button-group__item grid-col display-flex">
+      <li class="usa-button-group__item">
         <%= render ButtonComponent.new(
               action: ->(**tag_options, &block) { link_to(route[:path], **tag_options, &block) },
               big: true,
               outline: !is_current_path?(route[:path]),
               aria: { current: is_current_path?(route[:path]) ? 'page' : nil },
-              class: 'grid-col',
             ).with_content(route[:text]) %>
       </li>
     <% end %>
diff --git a/app/components/tab_navigation_component.scss b/app/components/tab_navigation_component.scss
new file mode 100644
index 00000000000..cdb86f9619d
--- /dev/null
+++ b/app/components/tab_navigation_component.scss
@@ -0,0 +1,54 @@
+@use 'uswds-core' as *;
+
+@forward 'usa-button-group';
+
+// Upstream: https://github.com/uswds/uswds/pull/5324
+.usa-button-group--segmented {
+  .usa-button {
+    @include u-display('flex');
+    @include u-flex('align-center', 'justify-center');
+  }
+
+  .usa-button-group__item {
+    @include u-display('flex');
+    @include grid-col('auto');
+  }
+}
+
+// Upstream: https://github.com/18F/identity-design-system/pull/359
+.usa-button-group__item {
+  &:first-child > .usa-button.usa-button--big {
+    margin-right: -1 * units($theme-button-stroke-width);
+  }
+
+  &:last-child > .usa-button.usa-button--big {
+    margin-left: -2 * units($theme-button-stroke-width);
+    width: calc(100% + #{units($theme-button-stroke-width) * 2});
+
+    @include at-media('mobile-lg') {
+      margin-left: -1 * units($theme-button-stroke-width);
+    }
+  }
+
+  &:where(:not(:first-child):not(:last-child)) > .usa-button.usa-button--big {
+    margin-right: -1 * units($theme-button-stroke-width);
+    margin-left: -1 * units($theme-button-stroke-width);
+  }
+}
+
+.tab-navigation .usa-button-group--segmented {
+  .usa-button-group__item {
+    flex-basis: 50%;
+  }
+
+  .usa-button-group__item:last-child > .usa-button,
+  .usa-button {
+    width: 100%;
+  }
+
+  .usa-button--big {
+    @include at-media-max('tablet') {
+      font-size: units(2);
+    }
+  }
+}
diff --git a/app/controllers/concerns/sign_in_a_b_test_concern.rb b/app/controllers/concerns/sign_in_a_b_test_concern.rb
deleted file mode 100644
index 01db563b03a..00000000000
--- a/app/controllers/concerns/sign_in_a_b_test_concern.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-module SignInABTestConcern
-  def sign_in_a_b_test_bucket
-    AbTests::SIGN_IN.bucket(sp_session[:request_id] || session.id)
-  end
-end
diff --git a/app/controllers/sign_up/completions_controller.rb b/app/controllers/sign_up/completions_controller.rb
index dce5374cbb6..2ae8faf7f55 100644
--- a/app/controllers/sign_up/completions_controller.rb
+++ b/app/controllers/sign_up/completions_controller.rb
@@ -1,7 +1,6 @@
 module SignUp
   class CompletionsController < ApplicationController
     include SecureHeadersConcern
-    include SignInABTestConcern
 
     before_action :confirm_two_factor_authenticated
     before_action :verify_confirmed, if: :ial2?
@@ -93,10 +92,7 @@ def analytics_attributes(page_occurence)
     end
 
     def track_completion_event(last_page)
-      analytics.user_registration_complete(
-        **analytics_attributes(last_page),
-        sign_in_a_b_test_bucket:,
-      )
+      analytics.user_registration_complete(**analytics_attributes(last_page))
     end
 
     def pii
diff --git a/app/controllers/sign_up/registrations_controller.rb b/app/controllers/sign_up/registrations_controller.rb
index 89b438d3f2a..d228d97bde0 100644
--- a/app/controllers/sign_up/registrations_controller.rb
+++ b/app/controllers/sign_up/registrations_controller.rb
@@ -2,7 +2,6 @@ module SignUp
   class RegistrationsController < ApplicationController
     include PhoneConfirmation
     include ApplicationHelper # for ial2_requested?
-    include SignInABTestConcern
 
     before_action :confirm_two_factor_authenticated, only: [:destroy_confirm]
     before_action :require_no_authentication
@@ -15,11 +14,7 @@ def new
         analytics: analytics,
         attempts_tracker: irs_attempts_api_tracker,
       )
-      @sign_in_a_b_test_bucket = sign_in_a_b_test_bucket
-      analytics.user_registration_enter_email_visit(
-        sign_in_a_b_test_bucket: @sign_in_a_b_test_bucket,
-        from_sign_in: params[:source] == 'sign_in',
-      )
+      analytics.user_registration_enter_email_visit
       render :new, formats: :html
     end
 
diff --git a/app/controllers/users/sessions_controller.rb b/app/controllers/users/sessions_controller.rb
index 8f2b1061dd3..16539f6c8a6 100644
--- a/app/controllers/users/sessions_controller.rb
+++ b/app/controllers/users/sessions_controller.rb
@@ -7,7 +7,6 @@ class SessionsController < Devise::SessionsController
     include RememberDeviceConcern
     include Ial2ProfileConcern
     include Api::CsrfTokenConcern
-    include SignInABTestConcern
 
     rescue_from ActionController::InvalidAuthenticityToken, with: :redirect_to_signin
 
@@ -24,12 +23,9 @@ def new
 
       @ial = sp_session_ial
       @browser_is_ie11 = browser_is_ie11?
-      @is_on_home_page = true
-      @sign_in_a_b_test_bucket = sign_in_a_b_test_bucket
       analytics.sign_in_page_visit(
         flash: flash[:alert],
         stored_location: session['user_return_to'],
-        sign_in_a_b_test_bucket: @sign_in_a_b_test_bucket,
       )
       super
     end
diff --git a/app/services/analytics_events.rb b/app/services/analytics_events.rb
index 9f6bd0551c9..3393ced72a5 100644
--- a/app/services/analytics_events.rb
+++ b/app/services/analytics_events.rb
@@ -3366,14 +3366,12 @@ def show_password_button_clicked(path:, **extra)
 
   # @param [String] flash
   # @param [String] stored_location
-  # @param [String] sign_in_a_b_test_bucket
   # tracks when a user visits the sign in page
-  def sign_in_page_visit(flash:, stored_location:, sign_in_a_b_test_bucket:, **extra)
+  def sign_in_page_visit(flash:, stored_location:, **extra)
     track_event(
       'Sign in page visited',
       flash: flash,
       stored_location: stored_location,
-      sign_in_a_b_test_bucket:,
       **extra,
     )
   end
@@ -3716,7 +3714,6 @@ def user_registration_cancellation(request_came_from:, **extra)
   # @param [String] service_provider_name
   # @param [String] page_occurence
   # @param [String] needs_completion_screen_reason
-  # @param [String] sign_in_a_b_test_bucket
   # @param [Array] sp_request_requested_attributes
   # @param [Array] sp_session_requested_attributes
   def user_registration_complete(
@@ -3724,7 +3721,6 @@ def user_registration_complete(
     service_provider_name:,
     page_occurence:,
     needs_completion_screen_reason:,
-    sign_in_a_b_test_bucket:,
     sp_session_requested_attributes:,
     sp_request_requested_attributes: nil,
     ialmax: nil,
@@ -3737,7 +3733,6 @@ def user_registration_complete(
       service_provider_name: service_provider_name,
       page_occurence: page_occurence,
       needs_completion_screen_reason: needs_completion_screen_reason,
-      sign_in_a_b_test_bucket:,
       sp_request_requested_attributes: sp_request_requested_attributes,
       sp_session_requested_attributes: sp_session_requested_attributes,
       **extra,
@@ -3797,15 +3792,8 @@ def user_registration_email_confirmation(
   end
 
   # Tracks when user visits enter email page
-  # @param [String] sign_in_a_b_test_bucket
-  # @param [Boolean] from_sign_in
-  def user_registration_enter_email_visit(sign_in_a_b_test_bucket:, from_sign_in:, **extra)
-    track_event(
-      'User Registration: enter email visited',
-      sign_in_a_b_test_bucket:,
-      from_sign_in:,
-      **extra,
-    )
+  def user_registration_enter_email_visit
+    track_event('User Registration: enter email visited')
   end
 
   # @param [Boolean] success
diff --git a/app/views/devise/sessions/new.html.erb b/app/views/devise/sessions/new.html.erb
index ef47fbf82f6..6492c7f8c6f 100644
--- a/app/views/devise/sessions/new.html.erb
+++ b/app/views/devise/sessions/new.html.erb
@@ -10,22 +10,18 @@
 
 <% if decorated_session.sp_name %>
   <%= render 'sign_up/registrations/sp_registration_heading' %>
-<% elsif @sign_in_a_b_test_bucket != :tabbed %>
-  <%= render PageHeadingComponent.new.with_content(decorated_session.new_session_heading) %>
 <% end %>
 
-<% if @sign_in_a_b_test_bucket == :tabbed %>
-  <%= render TabNavigationComponent.new(
-        label: t('account.login.tab_navigation'),
-        routes: [
-          { text: t('links.next'), path: new_user_session_url },
-          { text: t('links.create_account'), path: sign_up_email_url(source: :sign_in) },
-        ],
-        class: 'margin-bottom-4',
-      ) %>
+<%= render TabNavigationComponent.new(
+      label: t('account.login.tab_navigation'),
+      routes: [
+        { text: t('links.next'), path: new_user_session_url },
+        { text: t('links.create_account'), path: sign_up_email_url },
+      ],
+      class: 'margin-bottom-4',
+    ) %>
 
-  <%= render PageHeadingComponent.new.with_content(t('headings.sign_in_existing_users')) %>
-<% end %>
+<%= render PageHeadingComponent.new.with_content(t('headings.sign_in_existing_users')) %>
 
 <%= render 'shared/sp_alert', section: 'sign_in' %>
 
@@ -54,11 +50,6 @@
         },
       ) %>
   <%= f.submit t('links.next'), full_width: true, wide: false %>
-  <% if @sign_in_a_b_test_bucket == :default %>
-    <div class="margin-top-4 margin-bottom-2">
-      <%= render 'shared/create_account_banner' %>
-    </div>
-  <% end %>
 <% end %>
 <% if @ial && desktop_device? %>
   <div class='margin-x-neg-1 margin-top-205'>
diff --git a/app/views/layouts/base.html.erb b/app/views/layouts/base.html.erb
index d71a5412a96..caff6b633c3 100644
--- a/app/views/layouts/base.html.erb
+++ b/app/views/layouts/base.html.erb
@@ -76,12 +76,6 @@
         class: 'site-wrap bg-primary-lighter',
         id: local_assigns[:user_main_tag] == false ? nil : 'main-content',
       ) do %>
-    <% if @is_on_home_page && @sign_in_a_b_test_bucket == :banner %>
-      <div class="grid-container padding-y-2 card tablet:margin-bottom-1">
-        <%= render 'shared/create_account_banner' %>
-      </div>
-    <% end %>
-
     <div class="grid-container padding-y-4 tablet:padding-y-8 <%= local_assigns[:disable_card].present? ? '' : 'card' %>">
       <%= yield(:pre_flash_content) if content_for?(:pre_flash_content) %>
       <%= render FlashComponent.new(flash: flash) %>
diff --git a/app/views/shared/_create_account_banner.html.erb b/app/views/shared/_create_account_banner.html.erb
deleted file mode 100644
index 2badae27fff..00000000000
--- a/app/views/shared/_create_account_banner.html.erb
+++ /dev/null
@@ -1,10 +0,0 @@
-<h2 class='separator-text'>
-    <%= t('headings.create_account_with_sp.cta', app_name: APP_NAME) %>
-</h2>
-<%= render ButtonComponent.new(
-      action: ->(**tag_options, &block) { link_to(sign_up_email_url(source: :sign_in), **tag_options, &block) },
-      big: true,
-      outline: true,
-      full_width: true,
-      class: 'margin-bottom-105',
-    ).with_content(t('links.create_account')) %>
diff --git a/app/views/sign_up/registrations/new.html.erb b/app/views/sign_up/registrations/new.html.erb
index 50c4a104b94..3c6e816de19 100644
--- a/app/views/sign_up/registrations/new.html.erb
+++ b/app/views/sign_up/registrations/new.html.erb
@@ -2,24 +2,20 @@
 
 <%= render 'shared/sp_alert', section: 'sign_up' %>
 
-<% if @sign_in_a_b_test_bucket == :tabbed %>
-  <% if decorated_session.sp_name %>
-    <%= render 'sign_up/registrations/sp_registration_heading' %>
-  <% end %>
+<% if decorated_session.sp_name %>
+  <%= render 'sign_up/registrations/sp_registration_heading' %>
+<% end %>
 
-  <%= render TabNavigationComponent.new(
-        label: t('account.login.tab_navigation'),
-        routes: [
-          { text: t('links.next'), path: new_user_session_url },
-          { text: t('links.create_account'), path: sign_up_email_path },
-        ],
-        class: 'margin-bottom-4',
-      ) %>
+<%= render TabNavigationComponent.new(
+      label: t('account.login.tab_navigation'),
+      routes: [
+        { text: t('links.next'), path: new_user_session_url },
+        { text: t('links.create_account'), path: sign_up_email_path },
+      ],
+      class: 'margin-bottom-4',
+    ) %>
 
-  <%= render PageHeadingComponent.new.with_content(t('headings.create_account_new_users')) %>
-<% else %>
-  <%= render PageHeadingComponent.new.with_content(t('titles.registrations.new')) %>
-<% end %>
+<%= render PageHeadingComponent.new.with_content(t('headings.create_account_new_users')) %>
 
 <%= simple_form_for(
       @register_user_email_form,
diff --git a/config/application.yml.default b/config/application.yml.default
index e53c475b156..a9a3f7407a3 100644
--- a/config/application.yml.default
+++ b/config/application.yml.default
@@ -321,7 +321,6 @@ session_total_duration_timeout_in_minutes: 720
 ses_configuration_set_name: ''
 set_remember_device_session_expiration: false
 sign_up_mfa_selection_order_testing: '{ "default": 100, "authentication_app_priority": 0, "usability_priority": 0 }'
-sign_in_a_b_testing: '{ "default": 100,"tabbed" :0, "banner": 0 } '
 sp_handoff_bounce_max_seconds: 2
 show_user_attribute_deprecation_warnings: false
 otp_min_attempts_remaining_warning_count: 3
diff --git a/config/initializers/ab_tests.rb b/config/initializers/ab_tests.rb
index 1c0502f8558..8230fd81f42 100644
--- a/config/initializers/ab_tests.rb
+++ b/config/initializers/ab_tests.rb
@@ -19,11 +19,6 @@ module AbTests
     },
   )
 
-  SIGN_IN = AbTestBucket.new(
-    experiment_name: 'Sign In Experience',
-    buckets: IdentityConfig.store.sign_in_a_b_testing,
-  )
-
   def self.in_person_cta_variant_testing_buckets
     buckets = Hash.new
     percents = IdentityConfig.store.in_person_cta_variant_testing_percents
diff --git a/config/locales/headings/en.yml b/config/locales/headings/en.yml
index 4de2f26bb75..0a200f65ba2 100644
--- a/config/locales/headings/en.yml
+++ b/config/locales/headings/en.yml
@@ -24,7 +24,6 @@ en:
       new: Send another confirmation email
     create_account_new_users: Create an account for new users
     create_account_with_sp:
-      cta: First time using %{app_name}?
       sp_text: is using %{app_name} to allow you to sign in to your account safely and
         securely.
     edit_info:
diff --git a/config/locales/headings/es.yml b/config/locales/headings/es.yml
index e46608025c5..f876a645e9f 100644
--- a/config/locales/headings/es.yml
+++ b/config/locales/headings/es.yml
@@ -24,7 +24,6 @@ es:
       new: Enviar otro email de confirmación
     create_account_new_users: Crear una cuenta para usuarios nuevos
     create_account_with_sp:
-      cta: '¿Es la primera vez que utiliza %{app_name}?'
       sp_text: está utilizando %{app_name} para permitirle iniciar sesión en su cuenta
         de forma segura.
     edit_info:
diff --git a/config/locales/headings/fr.yml b/config/locales/headings/fr.yml
index bbb66734b05..8d34aea7712 100644
--- a/config/locales/headings/fr.yml
+++ b/config/locales/headings/fr.yml
@@ -24,7 +24,6 @@ fr:
       new: Envoyer un autre courriel de confirmation
     create_account_new_users: Créer un compte pour les nouveaux utilisateurs
     create_account_with_sp:
-      cta: Première fois que vous utilisez %{app_name}?
       sp_text: utilise %{app_name} pour vous permettre de vous connecter à votre
         compte de façon sûre et sécurisée.
     edit_info:
diff --git a/lib/identity_config.rb b/lib/identity_config.rb
index ca7e8011ed9..e57dcaceb97 100644
--- a/lib/identity_config.rb
+++ b/lib/identity_config.rb
@@ -428,7 +428,6 @@ def self.build_store(config_map)
       :sign_up_mfa_selection_order_testing, type: :json,
                                             options: { symbolize_names: true }
     )
-    config.add(:sign_in_a_b_testing, type: :json, options: { symbolize_names: true })
     config.add(:skip_encryption_allowed_list, type: :json)
     config.add(:sp_handoff_bounce_max_seconds, type: :integer)
     config.add(:state_tracking_enabled, type: :boolean)
diff --git a/spec/components/tab_navigation_component_spec.rb b/spec/components/tab_navigation_component_spec.rb
index cfae0201448..d5509904f7e 100644
--- a/spec/components/tab_navigation_component_spec.rb
+++ b/spec/components/tab_navigation_component_spec.rb
@@ -10,16 +10,16 @@
   end
 
   it 'renders labelled navigation' do
-    expect(rendered).to have_css('nav[aria-label="Navigation"]')
+    expect(rendered).to have_css('.tab-navigation[aria-label="Navigation"]')
     expect(rendered).to have_link('First') { |link| !is_current_link?(link) }
     expect(rendered).to have_link('Second') { |link| !is_current_link?(link) }
   end
 
   context 'with tag options' do
-    let(:tag_options) { super().merge(data: { foo: 'bar' }) }
+    let(:tag_options) { super().merge(data: { foo: 'bar' }, class: 'example') }
 
     it 'renders with tag options forwarded to navigation' do
-      expect(rendered).to have_css('nav[data-foo="bar"]')
+      expect(rendered).to have_css('.tab-navigation.example[data-foo="bar"]')
     end
   end
 
diff --git a/spec/controllers/concerns/sign_in_a_b_test_concern_spec.rb b/spec/controllers/concerns/sign_in_a_b_test_concern_spec.rb
deleted file mode 100644
index 61acd114b21..00000000000
--- a/spec/controllers/concerns/sign_in_a_b_test_concern_spec.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe SignInABTestConcern, type: :controller do
-  controller ApplicationController do
-    include SignInABTestConcern
-  end
-
-  describe '#sign_in_a_b_test_bucket' do
-    subject(:sign_in_a_b_test_bucket) { controller.sign_in_a_b_test_bucket }
-
-    let(:sp_session) { {} }
-
-    before do
-      allow(session).to receive(:id).and_return('session-id')
-      allow(controller).to receive(:sp_session).and_return(sp_session)
-      allow(AbTests::SIGN_IN).to receive(:bucket) do |discriminator|
-        case discriminator
-        when 'session-id'
-          :default
-        when 'request-id'
-          :tabbed
-        end
-      end
-    end
-
-    it 'returns the bucket based on session id' do
-      expect(sign_in_a_b_test_bucket).to eq(:default)
-    end
-
-    context 'with associated sp session request id' do
-      let(:sp_session) { { request_id: 'request-id' } }
-
-      it 'returns the bucket based on request id' do
-        expect(sign_in_a_b_test_bucket).to eq(:tabbed)
-      end
-    end
-  end
-end
diff --git a/spec/controllers/sign_up/completions_controller_spec.rb b/spec/controllers/sign_up/completions_controller_spec.rb
index 71a76d439d9..81df8de15c0 100644
--- a/spec/controllers/sign_up/completions_controller_spec.rb
+++ b/spec/controllers/sign_up/completions_controller_spec.rb
@@ -190,7 +190,6 @@
     before do
       stub_analytics
       allow(@analytics).to receive(:track_event)
-      allow(controller).to receive(:sign_in_a_b_test_bucket).and_return(:default)
       @linker = instance_double(IdentityLinker)
       allow(@linker).to receive(:link_identity).and_return(true)
       allow(IdentityLinker).to receive(:new).and_return(@linker)
@@ -214,7 +213,6 @@
           service_provider_name: subject.decorated_session.sp_name,
           page_occurence: 'agency-page',
           needs_completion_screen_reason: :new_sp,
-          sign_in_a_b_test_bucket: :default,
           sp_request_requested_attributes: nil,
           sp_session_requested_attributes: nil,
         )
@@ -274,7 +272,6 @@
           service_provider_name: subject.decorated_session.sp_name,
           page_occurence: 'agency-page',
           needs_completion_screen_reason: :new_sp,
-          sign_in_a_b_test_bucket: :default,
           sp_request_requested_attributes: nil,
           sp_session_requested_attributes: ['email'],
         )
diff --git a/spec/controllers/sign_up/registrations_controller_spec.rb b/spec/controllers/sign_up/registrations_controller_spec.rb
index 8a28af1c2d5..f996336248d 100644
--- a/spec/controllers/sign_up/registrations_controller_spec.rb
+++ b/spec/controllers/sign_up/registrations_controller_spec.rb
@@ -28,13 +28,7 @@
 
     it 'tracks visit event' do
       stub_analytics
-      allow(controller).to receive(:sign_in_a_b_test_bucket).and_return(:default)
-
-      expect(@analytics).to receive(:track_event).with(
-        'User Registration: enter email visited',
-        sign_in_a_b_test_bucket: :default,
-        from_sign_in: false,
-      )
+      expect(@analytics).to receive(:track_event).with('User Registration: enter email visited')
 
       get :new
     end
@@ -42,15 +36,10 @@
     context 'with source parameter' do
       it 'tracks visit event' do
         stub_analytics
-        allow(controller).to receive(:sign_in_a_b_test_bucket).and_return(:default)
 
-        expect(@analytics).to receive(:track_event).with(
-          'User Registration: enter email visited',
-          sign_in_a_b_test_bucket: :default,
-          from_sign_in: true,
-        )
+        expect(@analytics).to receive(:track_event).with('User Registration: enter email visited')
 
-        get :new, params: { source: :sign_in }
+        get :new
       end
     end
 
diff --git a/spec/controllers/users/sessions_controller_spec.rb b/spec/controllers/users/sessions_controller_spec.rb
index f62cc526563..ccf424b5b52 100644
--- a/spec/controllers/users/sessions_controller_spec.rb
+++ b/spec/controllers/users/sessions_controller_spec.rb
@@ -590,14 +590,12 @@
       it 'tracks page visit, any alert flashes, and the Devise stored location' do
         stub_analytics
         allow(controller).to receive(:flash).and_return(alert: 'hello')
-        allow(controller).to receive(:sign_in_a_b_test_bucket).and_return(:default)
         subject.session['user_return_to'] = mock_valid_site
 
         expect(@analytics).to receive(:track_event).with(
           'Sign in page visited',
           flash: 'hello',
           stored_location: mock_valid_site,
-          sign_in_a_b_test_bucket: :default,
         )
 
         get :new
diff --git a/spec/support/features/session_helper.rb b/spec/support/features/session_helper.rb
index 501e37c7a6c..e9df38b4ce6 100644
--- a/spec/support/features/session_helper.rb
+++ b/spec/support/features/session_helper.rb
@@ -391,12 +391,12 @@ def sign_up_user_from_sp_without_confirming_email(email)
 
       click_sign_in_from_landing_page_then_click_create_account
 
-      expect(current_url).to eq sign_up_email_url(source: :sign_in)
+      expect(current_url).to eq sign_up_email_url
       expect_branded_experience
 
       visit_landing_page_and_click_create_account_with_request_id(sp_request_id)
 
-      expect(current_url).to eq sign_up_email_url(source: :sign_in)
+      expect(current_url).to eq sign_up_email_url
       expect_branded_experience
 
       submit_form_with_invalid_email
diff --git a/spec/views/devise/sessions/new.html.erb_spec.rb b/spec/views/devise/sessions/new.html.erb_spec.rb
index d40a514afde..c1d7f8df5e3 100644
--- a/spec/views/devise/sessions/new.html.erb_spec.rb
+++ b/spec/views/devise/sessions/new.html.erb_spec.rb
@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe 'devise/sessions/new.html.erb' do
-  let(:sign_in_a_b_test_bucket) { :default }
-
   before do
     allow(view).to receive(:resource).and_return(build_stubbed(:user))
     allow(view).to receive(:resource_name).and_return(:user)
@@ -11,7 +9,6 @@
     allow(view).to receive(:decorated_session).and_return(SessionDecorator.new)
     allow_any_instance_of(ActionController::TestRequest).to receive(:path).
       and_return('/')
-    @sign_in_a_b_test_bucket = sign_in_a_b_test_bucket
     assign(:ial, 1)
   end
 
@@ -36,16 +33,19 @@
   it 'has a localized page heading' do
     render
 
-    expect(rendered).to have_selector('h1', text: t('headings.sign_in_without_sp'))
+    expect(rendered).to have_selector('h1', text: t('headings.sign_in_existing_users'))
   end
 
   it 'includes a link to create a new account' do
     render
 
-    expect(rendered).
-      to have_link(
-        t('links.create_account'), href: sign_up_email_url(request_id: nil, source: :sign_in)
-      )
+    expect(rendered).to have_link(t('links.create_account'), href: sign_up_email_url)
+  end
+
+  it 'includes a link to create a new account' do
+    render
+
+    expect(rendered).to have_link(t('links.create_account'), href: sign_up_email_url)
   end
 
   it 'includes a link to security / privacy page and privacy statement act' do
@@ -173,33 +173,4 @@
       expect(rendered).to have_selector('input.email')
     end
   end
-
-  context 'with tabbed layout A/B test' do
-    let(:sign_in_a_b_test_bucket) { :tabbed }
-
-    it 'has a localized page heading' do
-      render
-
-      expect(rendered).to have_selector('h1', text: t('headings.sign_in_existing_users'))
-    end
-
-    it 'includes a link to create a new account' do
-      render
-
-      expect(rendered).to have_link(
-        t('links.create_account'),
-        href: sign_up_email_url(request_id: nil, source: :sign_in),
-      )
-    end
-  end
-
-  context 'with banner A/B test' do
-    let(:sign_in_a_b_test_bucket) { :banner }
-
-    it 'has a localized page heading' do
-      render
-
-      expect(rendered).to have_selector('h1', text: t('headings.sign_in_without_sp'))
-    end
-  end
 end
diff --git a/spec/views/sign_up/registrations/new.html.erb_spec.rb b/spec/views/sign_up/registrations/new.html.erb_spec.rb
index b86a300aebd..ea53d058552 100644
--- a/spec/views/sign_up/registrations/new.html.erb_spec.rb
+++ b/spec/views/sign_up/registrations/new.html.erb_spec.rb
@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe 'sign_up/registrations/new.html.erb' do
-  let(:sign_in_a_b_test_bucket) { :default }
-
   let(:sp) do
     build_stubbed(
       :service_provider,
@@ -17,7 +15,6 @@
       analytics: FakeAnalytics.new,
       attempts_tracker: IrsAttemptsApiTrackingHelper::FakeAttemptsTracker.new,
     )
-    @sign_in_a_b_test_bucket = sign_in_a_b_test_bucket
     view_context = ActionController::Base.new.view_context
     allow(view_context).to receive(:new_user_session_url).
       and_return('https://www.example.com/')
@@ -44,7 +41,16 @@
   it 'has a localized page heading' do
     render
 
-    expect(rendered).to have_selector('h1', text: t('titles.registrations.new'))
+    expect(rendered).to have_selector('h1', text: t('headings.create_account_new_users'))
+  end
+
+  it 'includes a link to sign in' do
+    render
+
+    expect(rendered).to have_link(
+      t('links.next'),
+      href: new_user_session_url(request_id: nil),
+    )
   end
 
   it 'sets form autocomplete to off' do
@@ -79,23 +85,4 @@
 [target='_blank'][rel='noopener noreferrer']",
       )
   end
-
-  context 'with tabbed layout A/B test' do
-    let(:sign_in_a_b_test_bucket) { :tabbed }
-
-    it 'has a localized page heading' do
-      render
-
-      expect(rendered).to have_selector('h1', text: t('headings.create_account_new_users'))
-    end
-
-    it 'includes a link to sign in' do
-      render
-
-      expect(rendered).to have_link(
-        t('links.next'),
-        href: new_user_session_url(request_id: nil),
-      )
-    end
-  end
 end