diff --git a/app/controllers/one_login_controller.rb b/app/controllers/one_login_controller.rb
index cb6e382ccce..8b7276512b0 100644
--- a/app/controllers/one_login_controller.rb
+++ b/app/controllers/one_login_controller.rb
@@ -3,7 +3,7 @@ class OneLoginController < ApplicationController
 
   def callback
     auth = request.env['omniauth.auth']
-    session[:onelogin_id_token] = auth&.credentials&.id_token
+    session[:one_login_id_token] = auth&.credentials&.id_token
     candidate = OneLoginUser.authenticate(auth)
 
     sign_in_candidate(candidate)
@@ -11,7 +11,7 @@ def callback
     redirect_to candidate_interface_interstitial_path
   rescue OneLoginUser::Error => e
     session[:one_login_error] = e.message
-    redirect_to auth_onelogin_sign_out_path
+    redirect_to auth_one_login_sign_out_path
   end
 
   def bypass_callback
@@ -31,7 +31,7 @@ def bypass_callback
   end
 
   def sign_out
-    id_token = session[:onelogin_id_token]
+    id_token = session[:one_login_id_token]
     one_login_error = session[:one_login_error]
     reset_session
 
@@ -40,7 +40,7 @@ def sign_out
       redirect_to candidate_interface_create_account_or_sign_in_path
     else
       # Go back to one login to sign out the user on their end as well
-      redirect_to logout_onelogin(id_token), allow_other_host: true
+      redirect_to logout_one_login(id_token), allow_other_host: true
     end
   end
 
@@ -55,9 +55,9 @@ def sign_out_complete
 
   def failure
     session[:one_login_error] = "One login failure with #{params[:message]} " \
-                                "for onelogin_id_token: #{session[:onelogin_id_token]}"
+                                "for one_login_id_token: #{session[:one_login_id_token]}"
 
-    redirect_to auth_onelogin_sign_out_path
+    redirect_to auth_one_login_sign_out_path
   end
 
 private
@@ -73,9 +73,9 @@ def sign_in_candidate(candidate)
     candidate.update!(last_signed_in_at: Time.zone.now)
   end
 
-  def logout_onelogin(id_token_hint)
+  def logout_one_login(id_token_hint)
     params = {
-      post_logout_redirect_uri: URI(auth_onelogin_sign_out_complete_url),
+      post_logout_redirect_uri: URI(auth_one_login_sign_out_complete_url),
       id_token_hint:,
     }
     URI.parse("#{ENV['GOVUK_ONE_LOGIN_ISSUER_URL']}logout").tap do |uri|
diff --git a/app/views/layouts/_header.html.erb b/app/views/layouts/_header.html.erb
index dbbaee47aad..f26511df8a8 100644
--- a/app/views/layouts/_header.html.erb
+++ b/app/views/layouts/_header.html.erb
@@ -7,7 +7,7 @@
             )) %>
   <%= render PhaseBannerComponent.new(no_border: current_candidate.present?) %>
   <% if current_candidate %>
-    <% sign_out_path = FeatureFlag.active?(:one_login_candidate_sign_in) ? auth_onelogin_sign_out_path : candidate_interface_sign_out_path %>
+    <% sign_out_path = FeatureFlag.active?(:one_login_candidate_sign_in) ? auth_one_login_sign_out_path : candidate_interface_sign_out_path %>
     <%= render(PrimaryNavigationComponent.new(
                 items: NavigationItems.candidate_primary_navigation(current_candidate:, current_controller: controller),
                 items_right: [NavigationItems::NavigationItem.new('Sign out', sign_out_path)],
diff --git a/config/initializers/omniauth.rb b/config/initializers/omniauth.rb
index 14d1dceada8..f0f9083da59 100644
--- a/config/initializers/omniauth.rb
+++ b/config/initializers/omniauth.rb
@@ -1,6 +1,6 @@
 OmniAuth.config.logger = Rails.logger
 require 'omniauth/strategies/one_login_developer'
-require 'omniauth/onelogin_setup'
+require 'omniauth/one_login_setup'
 
 dfe_sign_in_identifier = ENV['DFE_SIGN_IN_CLIENT_ID']
 dfe_sign_in_secret = ENV['DFE_SIGN_IN_SECRET']
@@ -60,6 +60,6 @@ def self.bypass?
   end
 else
   Rails.application.config.middleware.use OmniAuth::Builder do |builder|
-    OneloginSetup.configure(builder)
+    OneLoginSetup.configure(builder)
   end
 end
diff --git a/config/routes.rb b/config/routes.rb
index f85b6aeaf2f..8c7c77194f0 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -23,10 +23,10 @@
   get '/auth/developer/callback' => 'dfe_sign_in#bypass_callback'
   get '/auth/dfe/sign-out' => 'dfe_sign_in#redirect_after_dsi_signout'
 
-  get '/auth/onelogin/callback', to: 'one_login#callback'
+  get '/auth/one-login/callback', to: 'one_login#callback'
   get '/auth/one-login-developer/callback' => 'one_login#bypass_callback'
-  get '/auth/onelogin/sign-out', to: 'one_login#sign_out'
-  get '/auth/onelogin/sign-out-complete', to: 'one_login#sign_out_complete'
+  get '/auth/one-login/sign-out', to: 'one_login#sign_out'
+  get '/auth/one-login/sign-out-complete', to: 'one_login#sign_out_complete'
   get '/auth/failure', to: 'one_login#failure'
 
   direct :find do
diff --git a/lib/omniauth/onelogin_setup.rb b/lib/omniauth/one_login_setup.rb
similarity index 82%
rename from lib/omniauth/onelogin_setup.rb
rename to lib/omniauth/one_login_setup.rb
index ff3048bb1ed..7c195cdb3a6 100644
--- a/lib/omniauth/onelogin_setup.rb
+++ b/lib/omniauth/one_login_setup.rb
@@ -1,9 +1,9 @@
-module OneloginSetup
+module OneLoginSetup
   class OmniAuth::Strategies::GovukOneLogin < OmniAuth::Strategies::OpenIDConnect; end
 
   def self.configure(builder)
     client_id = ENV.fetch('GOVUK_ONE_LOGIN_CLIENT_ID', '')
-    onelogin_issuer_uri = URI(ENV.fetch('GOVUK_ONE_LOGIN_ISSUER_URL', ''))
+    one_login_issuer_uri = URI(ENV.fetch('GOVUK_ONE_LOGIN_ISSUER_URL', ''))
     private_key_pem = ENV.fetch('GOVUK_ONE_LOGIN_PRIVATE_KEY', '')
     application_url = HostingEnvironment.application_url
 
@@ -17,11 +17,11 @@ def self.configure(builder)
     builder.provider :govuk_one_login,
                      name: :onelogin,
                      allow_authorize_params: %i[session_id],
-                     callback_path: '/auth/onelogin/callback',
+                     callback_path: '/auth/one-login/callback',
                      discovery: true,
-                     issuer: onelogin_issuer_uri.to_s,
+                     issuer: one_login_issuer_uri.to_s,
                      path_prefix: '/auth',
-                     post_logout_redirect_uri: "#{application_url}/auth/onelogin/sign-out-complete",
+                     post_logout_redirect_uri: "#{application_url}/auth/one-login/sign-out-complete",
                      response_type: :code,
                      scope: %w[email openid],
                      client_auth_method: :jwt_bearer,
@@ -30,10 +30,10 @@ def self.configure(builder)
                        end_session_endpoint: '/oauth2/logout',
                        token_endpoint: '/oauth2/token',
                        userinfo_endpoint: '/oauth2/userinfo',
-                       host: onelogin_issuer_uri.host,
+                       host: one_login_issuer_uri.host,
                        identifier: client_id,
                        port: 443,
-                       redirect_uri: "#{application_url}/auth/onelogin/callback",
+                       redirect_uri: "#{application_url}/auth/one-login/callback",
                        scheme: 'https',
                        private_key: private_key,
                      }
diff --git a/spec/requests/one_login_controller_spec.rb b/spec/requests/one_login_controller_spec.rb
index 9bf0fc2f5dd..44d1df2d616 100644
--- a/spec/requests/one_login_controller_spec.rb
+++ b/spec/requests/one_login_controller_spec.rb
@@ -10,7 +10,7 @@
   let(:omniauth_hash) do
     OmniAuth::AuthHash.new(
       {
-        provider: 'onelogin',
+        provider: 'one_login',
         uid: '123',
         info: {
           email: 'test@email.com',
@@ -22,12 +22,12 @@
     )
   end
 
-  describe 'GET /auth/onelogin/callback' do
+  describe 'GET /auth/one-login/callback' do
     it 'redirects to candidate_interface_interstitial_path' do
       candidate = create(:candidate)
       create(:one_login_auth, candidate:, token: '123')
 
-      get auth_onelogin_callback_path
+      get auth_one_login_callback_path
 
       expect(response).to redirect_to(candidate_interface_interstitial_path)
     end
@@ -36,20 +36,20 @@
       let(:omniauth_hash) { nil }
 
       it 'returns unprocessable_entity' do
-        get auth_onelogin_callback_path
+        get auth_one_login_callback_path
 
         expect(response).to have_http_status(:unprocessable_entity)
       end
     end
 
-    context 'when candidate has a different onelogin token than the one returned by onelogin' do
-      it 'redirects to auth_onelogin_sign_out_path' do
+    context 'when candidate has a different one login token than the one returned by one login' do
+      it 'redirects to auth_one_login_sign_out_path' do
         candidate = create(:candidate, email_address: 'test@email.com')
         create(:one_login_auth, candidate:, token: '456')
 
-        get auth_onelogin_callback_path
+        get auth_one_login_callback_path
 
-        expect(response).to redirect_to(auth_onelogin_sign_out_path)
+        expect(response).to redirect_to(auth_one_login_sign_out_path)
         expect(session[:one_login_error]).to eq(
           "Candidate #{candidate.id} has a different one login token than the " \
           'user trying to login. Token used to auth 123',
@@ -112,15 +112,15 @@
     end
   end
 
-  describe 'GET /auth/onelogin/sign_out' do
+  describe 'GET /auth/one-login/sign_out' do
     it 'redirects to one_login logout url' do
       create(:candidate, email_address: 'test@email.com')
 
-      get auth_onelogin_callback_path # set the session variables
-      get auth_onelogin_sign_out_path
+      get auth_one_login_callback_path # set the session variables
+      get auth_one_login_sign_out_path
 
       params = {
-        post_logout_redirect_uri: URI(auth_onelogin_sign_out_complete_url),
+        post_logout_redirect_uri: URI(auth_one_login_sign_out_complete_url),
         id_token_hint: 'id_token',
       }
       one_login_logout_url = URI.parse("#{ENV['GOVUK_ONE_LOGIN_ISSUER_URL']}logout").tap do |uri|
@@ -130,22 +130,22 @@
       expect(response).to redirect_to(one_login_logout_url)
     end
 
-    context 'when candidate has a different onelogin token than the one returned by onelogin' do
+    context 'when candidate has a different one login token than the one returned by one login' do
       it 'redirects to one_login logout url and persists the session error message' do
         candidate = create(:candidate, email_address: 'test@email.com')
         create(:one_login_auth, candidate:, token: '456')
 
-        get auth_onelogin_callback_path # set the session variables
-        get auth_onelogin_sign_out_path
+        get auth_one_login_callback_path # set the session variables
+        get auth_one_login_sign_out_path
 
-        expect(session[:onelogin_id_token]).to be_nil
+        expect(session[:one_login_id_token]).to be_nil
         expect(session[:one_login_error]).to eq(
           "Candidate #{candidate.id} has a different one login token than the " \
           'user trying to login. Token used to auth 123',
         )
 
         params = {
-          post_logout_redirect_uri: URI(auth_onelogin_sign_out_complete_url),
+          post_logout_redirect_uri: URI(auth_one_login_sign_out_complete_url),
           id_token_hint: 'id_token',
         }
         one_login_url = URI.parse("#{ENV['GOVUK_ONE_LOGIN_ISSUER_URL']}logout").tap do |uri|
@@ -160,21 +160,21 @@
       it 'redirects to sign_in page' do
         allow(OneLogin).to receive(:bypass?).and_return(true)
 
-        get auth_onelogin_sign_out_path
+        get auth_one_login_sign_out_path
         expect(response).to redirect_to candidate_interface_create_account_or_sign_in_path
       end
     end
   end
 
-  describe 'GET /auth/onelogin/sign_out_complete' do
-    context 'when candidate has a different onelogin token than the one returned by onelogin' do
-      it 'redirects to logout_onelogin_path and persists the session error message' do
+  describe 'GET /auth/one-login/sign_out_complete' do
+    context 'when candidate has a different one login token than the one returned by one login' do
+      it 'redirects to logout_one_login_path and persists the session error message' do
         candidate = create(:candidate, email_address: 'test@email.com')
         create(:one_login_auth, candidate:, token: '456')
         allow(Sentry).to receive(:capture_message)
 
-        get auth_onelogin_callback_path # set the session variables
-        get auth_onelogin_sign_out_complete_path
+        get auth_one_login_callback_path # set the session variables
+        get auth_one_login_sign_out_complete_path
 
         expect(Sentry).to have_received(:capture_message).with(
           "Candidate #{candidate.id} has a different one login token than the " \
@@ -186,8 +186,8 @@
     end
 
     context 'candidate has no errors' do
-      it 'redirects to logout_onelogin_path and persists the session error message' do
-        get auth_onelogin_sign_out_complete_path
+      it 'redirects to logout_one_login_path and persists the session error message' do
+        get auth_one_login_sign_out_complete_path
 
         expect(response).to redirect_to(
           candidate_interface_create_account_or_sign_in_path,
@@ -196,15 +196,15 @@
     end
   end
 
-  describe 'GET /auth/onelogin/failure' do
+  describe 'GET /auth/one-login/failure' do
     it 'redirects to auth_failure_path with one login error' do
-      get auth_onelogin_callback_path # set the session variables
+      get auth_one_login_callback_path # set the session variables
       get auth_failure_path(params: { message: 'error_message' })
 
       expect(session[:one_login_error]).to eq(
-        'One login failure with error_message for onelogin_id_token: id_token',
+        'One login failure with error_message for one_login_id_token: id_token',
       )
-      expect(response).to redirect_to(auth_onelogin_sign_out_path)
+      expect(response).to redirect_to(auth_one_login_sign_out_path)
     end
   end
 end
diff --git a/spec/support/test_helpers/one_login_helper.rb b/spec/support/test_helpers/one_login_helper.rb
index 9eb796f40a2..3ff2393c738 100644
--- a/spec/support/test_helpers/one_login_helper.rb
+++ b/spec/support/test_helpers/one_login_helper.rb
@@ -1,5 +1,5 @@
 module OneLoginHelper
-  def user_exists_in_onelogin(email_address: 'test@email.com', uid: 'UID')
+  def user_exists_in_one_login(email_address: 'test@email.com', uid: 'UID')
     OmniAuth.config.mock_auth[:onelogin] = OmniAuth::AuthHash.new(
       {
         provider: 'onelogin',
diff --git a/spec/system/candidate_interface/one_login_signup/candidate_signs_in_spec.rb b/spec/system/candidate_interface/one_login_signup/candidate_signs_in_spec.rb
index 74cf8e4c8eb..fab5354321e 100644
--- a/spec/system/candidate_interface/one_login_signup/candidate_signs_in_spec.rb
+++ b/spec/system/candidate_interface/one_login_signup/candidate_signs_in_spec.rb
@@ -48,7 +48,7 @@ def given_i_have_a_candidate_record
   end
 
   def given_i_have_one_login_account(email_address)
-    user_exists_in_onelogin(email_address:)
+    user_exists_in_one_login(email_address:)
   end
 
   def given_i_already_have_a_different_one_login_token(candidate)