diff --git a/.erb-lint.yml b/.erb-lint.yml
index 5d41947974a..78dd764abf1 100644
--- a/.erb-lint.yml
+++ b/.erb-lint.yml
@@ -13,6 +13,8 @@ linters:
         Enabled: false
       Rails/OutputSafety:
         Enabled: false
+      Lint/UselessAssignment:
+        Enabled: false
   DeprecatedClasses:
     enabled: true
     rule_set:
diff --git a/.rubocop.yml b/.rubocop.yml
index 43f1d32e887..ff08dc1443a 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -590,6 +590,9 @@ Lint/UriEscapeUnescape:
 Lint/UriRegexp:
   Enabled: true
 
+Lint/UselessAssignment:
+  Enabled: true
+
 Lint/UselessElseWithoutRescue:
   Enabled: true
 
diff --git a/app/services/analytics.rb b/app/services/analytics.rb
index b0e7c6209d1..4638728f1b6 100644
--- a/app/services/analytics.rb
+++ b/app/services/analytics.rb
@@ -80,7 +80,7 @@ def register_doc_auth_step_from_analytics_event(event, attributes)
 
   def track_mfa_submit_event(attributes)
     track_event(MULTI_FACTOR_AUTH, attributes)
-    mfa_event_type = (attributes[:success] ? 'success' : 'fail')
+    attributes[:success] ? 'success' : 'fail'
   end
 
   attr_reader :user, :request, :sp, :ahoy
diff --git a/app/services/db/monthly_sp_auth_count/total_monthly_auth_counts_within_iaa_window.rb b/app/services/db/monthly_sp_auth_count/total_monthly_auth_counts_within_iaa_window.rb
index 16aec58f44e..eb16b4651fe 100644
--- a/app/services/db/monthly_sp_auth_count/total_monthly_auth_counts_within_iaa_window.rb
+++ b/app/services/db/monthly_sp_auth_count/total_monthly_auth_counts_within_iaa_window.rb
@@ -89,7 +89,7 @@ def full_month_subquery(issuer:, full_months:)
           year_months: full_months.map { |r| r.begin.strftime('%Y%m') },
         }.transform_values { |value| quote(value) }
 
-        full_month_subquery = format(<<~SQL, params)
+        format(<<~SQL, params)
           SELECT
             monthly_sp_auth_counts.user_id
           , monthly_sp_auth_counts.year_month
diff --git a/app/services/db/monthly_sp_auth_count/unique_monthly_auth_counts_by_iaa.rb b/app/services/db/monthly_sp_auth_count/unique_monthly_auth_counts_by_iaa.rb
index 0a32776d2f0..498ead6e2f3 100644
--- a/app/services/db/monthly_sp_auth_count/unique_monthly_auth_counts_by_iaa.rb
+++ b/app/services/db/monthly_sp_auth_count/unique_monthly_auth_counts_by_iaa.rb
@@ -84,7 +84,7 @@ def full_month_subquery(issuers:, full_months:)
           year_months: full_months.map { |r| r.begin.strftime('%Y%m') },
         }.transform_values { |value| quote(value) }
 
-        full_month_subquery = format(<<~SQL, params)
+        format(<<~SQL, params)
           SELECT
             monthly_sp_auth_counts.user_id
           , monthly_sp_auth_counts.year_month
diff --git a/app/services/piv_cac_service.rb b/app/services/piv_cac_service.rb
index beb18fa73ff..9754b1be04f 100644
--- a/app/services/piv_cac_service.rb
+++ b/app/services/piv_cac_service.rb
@@ -71,7 +71,7 @@ def token_response(token)
       ) do |req|
         req.options.context = { service_name: 'piv_cac_token' }
       end
-    rescue Faraday::ConnectionFailed, Faraday::TimeoutError => e
+    rescue Faraday::ConnectionFailed, Faraday::TimeoutError
       nil
     end
 
diff --git a/config/application.rb b/config/application.rb
index 7423088bf5d..4163a3df090 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -67,7 +67,7 @@ class Application < Rails::Application
     # see config/initializers/job_configurations.rb for cron schedule
 
     includes_star_queue = config.good_job.queues.split(';').any? do |name_threads|
-      name, threads = name_threads.split(':', 2)
+      name, _threads = name_threads.split(':', 2)
       name == '*'
     end
     raise 'good_job.queues does not contain *, but it should' if !includes_star_queue
diff --git a/config/initializers/job_configurations.rb b/config/initializers/job_configurations.rb
index 862900a431c..bc6ead33794 100644
--- a/config/initializers/job_configurations.rb
+++ b/config/initializers/job_configurations.rb
@@ -1,10 +1,7 @@
 cron_5m = '0/5 * * * *'
-interval_5m = 5 * 60
 cron_1h = '0 * * * *'
-interval_1h = 60 * 60
 cron_24h = '0 0 * * *'
 gpo_cron_24h = '0 10 * * *' # 10am UTC is 5am EST/6am EDT
-inteval_24h = 24 * 60 * 60
 
 if defined?(Rails::Console)
   Rails.logger.info 'job_configurations: console detected, skipping schedule'
diff --git a/lib/analytics_events_documenter.rb b/lib/analytics_events_documenter.rb
index fbebd9fe6ba..c0ab6836858 100644
--- a/lib/analytics_events_documenter.rb
+++ b/lib/analytics_events_documenter.rb
@@ -93,8 +93,6 @@ def missing_documentation
   # @return [{ events: Array<Hash>}]
   def as_json
     events_json_summary = analytics_methods.map do |method_object|
-      param_names = method_object.parameters.map { |p| p.first.chomp(':') }
-
       attributes = method_object.tags('param').map do |tag|
         {
           name: tag.name,
diff --git a/lib/tasks/newrelic.rake b/lib/tasks/newrelic.rake
index e39de8bca3e..9ecfe0b4490 100644
--- a/lib/tasks/newrelic.rake
+++ b/lib/tasks/newrelic.rake
@@ -13,6 +13,6 @@ namespace :newrelic do
   task deployment: :environment do
     require 'new_relic/cli/command'
     revision = `git rev-parse HEAD`.chomp
-    NewRelic::Cli::Deployments.new(revision: `git rev-parse HEAD`).run
+    NewRelic::Cli::Deployments.new(revision: revision).run
   end
 end
diff --git a/spec/controllers/idv/doc_auth_controller_spec.rb b/spec/controllers/idv/doc_auth_controller_spec.rb
index e908dc9b584..bcf299095c6 100644
--- a/spec/controllers/idv/doc_auth_controller_spec.rb
+++ b/spec/controllers/idv/doc_auth_controller_spec.rb
@@ -138,13 +138,6 @@
       mock_next_step(:back_image)
       allow_any_instance_of(Flow::BaseFlow).to \
         receive(:flow_session).and_return(pii_from_doc: {})
-      result = {
-        success: true,
-        errors: {},
-        step: 'ssn',
-        step_count: 1,
-        pii_like_keypaths: [[:errors, :ssn], [:error_details, :ssn]],
-      }
 
       put :update, params: { step: 'ssn', doc_auth: { step: 'ssn', ssn: '666-66-6666' } }
       put :update, params: { step: 'ssn', doc_auth: { step: 'ssn', ssn: '111-11-1111' } }
diff --git a/spec/controllers/idv_controller_spec.rb b/spec/controllers/idv_controller_spec.rb
index 85b04d2c0e7..c00fcb29841 100644
--- a/spec/controllers/idv_controller_spec.rb
+++ b/spec/controllers/idv_controller_spec.rb
@@ -71,7 +71,7 @@
     end
 
     context 'no SP context' do
-      let(:user) { user = build(:user, password: ControllerHelper::VALID_PASSWORD) }
+      let(:user) { build(:user, password: ControllerHelper::VALID_PASSWORD) }
 
       before do
         stub_sign_in(user)
diff --git a/spec/controllers/two_factor_authentication/personal_key_verification_controller_spec.rb b/spec/controllers/two_factor_authentication/personal_key_verification_controller_spec.rb
index 47265188ebf..192b5e6c36d 100644
--- a/spec/controllers/two_factor_authentication/personal_key_verification_controller_spec.rb
+++ b/spec/controllers/two_factor_authentication/personal_key_verification_controller_spec.rb
@@ -30,7 +30,7 @@
     it 'redirects to the two_factor_options page if user is IAL2' do
       profile = create(:profile, :active, :verified, pii: { ssn: '1234' })
       user = profile.user
-      raw_key = PersonalKeyGenerator.new(user).create
+      PersonalKeyGenerator.new(user).create
       stub_sign_in_before_2fa(user)
       get :show
 
@@ -86,7 +86,6 @@
       profile = create(:profile, :active, :verified, pii: { ssn: '1234' })
       user = profile.user
       raw_key = PersonalKeyGenerator.new(user).create
-      old_key = user.reload.encrypted_recovery_code_digest
       stub_sign_in_before_2fa(user)
       post :create, params: { personal_key_form: { personal_key: raw_key } }
 
diff --git a/spec/features/idv/doc_auth/send_link_step_spec.rb b/spec/features/idv/doc_auth/send_link_step_spec.rb
index c0d08df63d0..d04343c209c 100644
--- a/spec/features/idv/doc_auth/send_link_step_spec.rb
+++ b/spec/features/idv/doc_auth/send_link_step_spec.rb
@@ -81,7 +81,7 @@
 
   it 'throttles sending the link' do
     allow_any_instance_of(ApplicationController).to receive(:analytics).and_return(fake_analytics)
-    user = sign_in_and_2fa_user
+    sign_in_and_2fa_user
     complete_doc_auth_steps_before_send_link_step
     timeout = distance_of_time_in_words(Throttle.attempt_window_in_minutes(:idv_send_link).minutes)
     freeze_time do
diff --git a/spec/features/idv/steps/confirmation_step_spec.rb b/spec/features/idv/steps/confirmation_step_spec.rb
index 2dbf7bc1fce..b69c5a6dd1b 100644
--- a/spec/features/idv/steps/confirmation_step_spec.rb
+++ b/spec/features/idv/steps/confirmation_step_spec.rb
@@ -9,8 +9,6 @@
 
   context 'personal key information and actions' do
     before do
-      personal_key = 'a1b2c3d4e5f6g7h8'
-
       @user = sign_in_and_2fa_user
 
       visit idv_path
diff --git a/spec/features/users/password_recovery_via_recovery_code_spec.rb b/spec/features/users/password_recovery_via_recovery_code_spec.rb
index ca7bdafba58..efc32532fb1 100644
--- a/spec/features/users/password_recovery_via_recovery_code_spec.rb
+++ b/spec/features/users/password_recovery_via_recovery_code_spec.rb
@@ -59,7 +59,7 @@
   end
 
   scenario 'resets password, not allowed to use personal key as 2fa', email: true do
-    personal_key = personal_key_from_pii(user, pii)
+    _personal_key = personal_key_from_pii(user, pii)
 
     trigger_reset_password_and_click_email_link(user.email)
     reset_password_and_sign_back_in(user, new_password)
diff --git a/spec/forms/new_phone_form_spec.rb b/spec/forms/new_phone_form_spec.rb
index 2f2d0b02c9f..f2472fb934d 100644
--- a/spec/forms/new_phone_form_spec.rb
+++ b/spec/forms/new_phone_form_spec.rb
@@ -154,7 +154,7 @@
       it 'is invalid' do
         phone = PhoneFormatter.format('+1 (954) 525-1262', country_code: 'US')
         params[:phone] = phone
-        phone_configuration = create(:phone_configuration, user: user, phone: phone)
+        create(:phone_configuration, user: user, phone: phone)
 
         result = subject.submit(params)
 
@@ -167,7 +167,7 @@
         raw_phone = '+1 954 5251262'
         phone = PhoneFormatter.format(raw_phone, country_code: 'US')
         params[:phone] = phone
-        phone_configuration = create(:phone_configuration, user: user, phone: raw_phone)
+        create(:phone_configuration, user: user, phone: raw_phone)
 
         result = subject.submit(params)
 
diff --git a/spec/forms/otp_verification_form_spec.rb b/spec/forms/otp_verification_form_spec.rb
index 9350e9aad95..4ea05acc98c 100644
--- a/spec/forms/otp_verification_form_spec.rb
+++ b/spec/forms/otp_verification_form_spec.rb
@@ -44,7 +44,6 @@
 
         invalid_codes.each do |code|
           form = OtpVerificationForm.new(user, code)
-          result = instance_double(FormResponse)
           allow(user).to receive(:authenticate_direct_otp).with(code).and_return(true)
 
           result = FormResponse.new(
diff --git a/spec/forms/register_user_email_form_spec.rb b/spec/forms/register_user_email_form_spec.rb
index bb543e0b63f..4f93cff2c23 100644
--- a/spec/forms/register_user_email_form_spec.rb
+++ b/spec/forms/register_user_email_form_spec.rb
@@ -33,7 +33,7 @@
       end
 
       it 'creates throttle events after reaching throttle limit' do
-        existing_user = create(:user, :signed_up, email: 'taken@example.com')
+        create(:user, :signed_up, email: 'taken@example.com')
 
         (IdentityConfig.store.reg_confirmed_email_max_attempts + 1).times do
           subject.submit(email: 'TAKEN@example.com', terms_accepted: '1')
@@ -72,7 +72,7 @@
       end
 
       it 'creates throttle events after reaching throttle limit' do
-        user = create(:user, email: 'test@example.com', confirmed_at: nil, uuid: '123')
+        create(:user, email: 'test@example.com', confirmed_at: nil, uuid: '123')
         (IdentityConfig.store.reg_unconfirmed_email_max_attempts + 1).times do
           subject.submit(email: 'test@example.com', terms_accepted: '1')
         end
diff --git a/spec/forms/verify_password_form_spec.rb b/spec/forms/verify_password_form_spec.rb
index 59660899be1..b46008443f3 100644
--- a/spec/forms/verify_password_form_spec.rb
+++ b/spec/forms/verify_password_form_spec.rb
@@ -7,7 +7,7 @@
         password = 'cab123DZN456'
         user = create(:user, password: password)
         pii = { ssn: '111111111' }
-        profile = create(:profile, user: user, deactivation_reason: :password_reset, pii: pii)
+        create(:profile, user: user, deactivation_reason: :password_reset, pii: pii)
 
         form = VerifyPasswordForm.new(
           user: user, password: password,
@@ -25,7 +25,7 @@
         password = 'cab123DZN456'
         user = create(:user, password: password)
         pii = { ssn: '111111111' }
-        profile = create(:profile, user: user, deactivation_reason: :password_reset, pii: pii)
+        create(:profile, user: user, deactivation_reason: :password_reset, pii: pii)
 
         form = VerifyPasswordForm.new(
           user: user, password: "#{password}a",
diff --git a/spec/jobs/remove_old_throttles_job_spec.rb b/spec/jobs/remove_old_throttles_job_spec.rb
index eda7cf330ab..a42dd95aa5d 100644
--- a/spec/jobs/remove_old_throttles_job_spec.rb
+++ b/spec/jobs/remove_old_throttles_job_spec.rb
@@ -11,7 +11,7 @@
     subject(:perform) { job.perform(now, limit: limit, total_limit: total_limit) }
 
     it 'deletes throttles that are older than WINDOW' do
-      old_throttle = create(:throttle, target: SecureRandom.hex, updated_at: now - 45.days)
+      _old_throttle = create(:throttle, target: SecureRandom.hex, updated_at: now - 45.days)
       new_throttle = create(:throttle, target: SecureRandom.hex, updated_at: now)
 
       perform
diff --git a/spec/jobs/reports/agency_invoice_iaa_supplement_report_spec.rb b/spec/jobs/reports/agency_invoice_iaa_supplement_report_spec.rb
index 5c8b635d59b..bf659fe3bb8 100644
--- a/spec/jobs/reports/agency_invoice_iaa_supplement_report_spec.rb
+++ b/spec/jobs/reports/agency_invoice_iaa_supplement_report_spec.rb
@@ -164,6 +164,8 @@
               iaa_end_date: iaa2_range.end.to_s,
             },
           ]
+
+          expect(results).to match_array(rows)
         end
       end
 
diff --git a/spec/lib/telephony/otp_sender_spec.rb b/spec/lib/telephony/otp_sender_spec.rb
index 00e74223419..dcf4ecf3e79 100644
--- a/spec/lib/telephony/otp_sender_spec.rb
+++ b/spec/lib/telephony/otp_sender_spec.rb
@@ -258,7 +258,7 @@
 
   describe '#authentication_message' do
     let(:sender) do
-      sender = Telephony::OtpSender.new(
+      Telephony::OtpSender.new(
         to: '+18888675309',
         otp: 'ABC123',
         channel: 'sms',
@@ -306,7 +306,7 @@
 
   describe '#confirmation_message' do
     let(:sender) do
-      sender = Telephony::OtpSender.new(
+      Telephony::OtpSender.new(
         to: '+18888675309',
         otp: 'ABC123',
         channel: 'sms',
diff --git a/spec/lib/telephony/pinpoint/aws_credential_builder_spec.rb b/spec/lib/telephony/pinpoint/aws_credential_builder_spec.rb
index 282a6aedb34..a5448aadf70 100644
--- a/spec/lib/telephony/pinpoint/aws_credential_builder_spec.rb
+++ b/spec/lib/telephony/pinpoint/aws_credential_builder_spec.rb
@@ -43,7 +43,6 @@
     end
 
     it 'returns nil if STS raises a Seahorse::Client::NetworkingError' do
-      expected_credential = instance_double(Aws::AssumeRoleCredentials)
       expect(Aws::STS::Client).to receive(:new).and_raise(
         Seahorse::Client::NetworkingError.new(Net::ReadTimeout.new),
       )
diff --git a/spec/mailers/user_mailer_spec.rb b/spec/mailers/user_mailer_spec.rb
index 26de8a68908..878879d46c9 100644
--- a/spec/mailers/user_mailer_spec.rb
+++ b/spec/mailers/user_mailer_spec.rb
@@ -300,7 +300,6 @@ def expect_email_body_to_have_help_and_contact_links
     end
 
     it 'renders the body' do
-      reset_text = t('user_mailer.account_reset_granted.cancel_link_text')
       expect(mail.html_part.body).to have_content(
         strip_tags(
           t('user_mailer.account_reset_request.intro_html', app_name: APP_NAME),
diff --git a/spec/models/phone_number_opt_out_spec.rb b/spec/models/phone_number_opt_out_spec.rb
index 3c64f6162d2..942681208af 100644
--- a/spec/models/phone_number_opt_out_spec.rb
+++ b/spec/models/phone_number_opt_out_spec.rb
@@ -1,7 +1,7 @@
 require 'rails_helper'
 
 RSpec.describe PhoneNumberOptOut do
-  let(:phone) { phone = Faker::PhoneNumber.cell_phone }
+  let(:phone) { Faker::PhoneNumber.cell_phone }
 
   describe '.create_or_find_by_phone' do
     it 'creates a record for the phone' do
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 5cfd7e011f5..a0bb7410793 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -93,7 +93,6 @@ class Analytics
 
   config.before(:each) do
     DocAuth::Mock::DocAuthMockClient.reset!
-    original_queue_adapter = ActiveJob::Base.queue_adapter
     descendants = ActiveJob::Base.descendants + [ActiveJob::Base]
 
     ActiveJob::Base.queue_adapter = :inline
diff --git a/spec/services/analytics_spec.rb b/spec/services/analytics_spec.rb
index 2403cdd4129..bb6134eb9c8 100644
--- a/spec/services/analytics_spec.rb
+++ b/spec/services/analytics_spec.rb
@@ -82,7 +82,6 @@
     end
 
     it 'tracks the user passed in to the track_event method' do
-      current_user = build_stubbed(:user, uuid: '123')
       tracked_user = build_stubbed(:user, uuid: '456')
 
       analytics_hash = {
diff --git a/spec/services/idv/actions/verify_document_status_action_spec.rb b/spec/services/idv/actions/verify_document_status_action_spec.rb
index 1299dae6eab..776a929b040 100644
--- a/spec/services/idv/actions/verify_document_status_action_spec.rb
+++ b/spec/services/idv/actions/verify_document_status_action_spec.rb
@@ -46,7 +46,7 @@
     end
 
     it 'calls analytics if missing from no document capture session' do
-      response = subject.call
+      subject.call
 
       expect(analytics).to have_logged_event('Proofing Document Result Missing', {})
       expect(analytics).to have_logged_event(
@@ -65,7 +65,7 @@
 
       expect(subject).to receive(:verify_document_capture_session).
         and_return(verify_document_capture_session).at_least(:once)
-      response = subject.call
+      subject.call
 
       expect(analytics).to have_logged_event('Proofing Document Result Missing', {})
       expect(analytics).to have_logged_event(
diff --git a/spec/services/phone_confirmation/confirmaton_session_spec.rb b/spec/services/phone_confirmation/confirmaton_session_spec.rb
index 694073b412a..82d10a9d42e 100644
--- a/spec/services/phone_confirmation/confirmaton_session_spec.rb
+++ b/spec/services/phone_confirmation/confirmaton_session_spec.rb
@@ -74,7 +74,7 @@
 
     it 'returns false if the code does not match' do
       bad_code = '1' * (TwoFactorAuthenticatable::DIRECT_OTP_LENGTH - 1)
-      expect(subject.matches_code?('11111')).to eq(false)
+      expect(subject.matches_code?(bad_code)).to eq(false)
     end
 
     it 'uses a secure comparison' do
diff --git a/spec/services/proofing/base_spec.rb b/spec/services/proofing/base_spec.rb
index eba20a37924..4b5f9e8715f 100644
--- a/spec/services/proofing/base_spec.rb
+++ b/spec/services/proofing/base_spec.rb
@@ -274,7 +274,7 @@ def hello(applicant, results)
 
       it 'does not affect the other proofer' do
         # This is an explicit check for class-level side effects
-        impl2 = Class.new(Proofing::Base) do
+        _impl2 = Class.new(Proofing::Base) do
           required_attributes :foobarbaz
         end
         expect(subject.exception?).to eq(false)
diff --git a/spec/support/deprecated_classes.rb b/spec/support/deprecated_classes.rb
index d1af3047353..333b672b558 100644
--- a/spec/support/deprecated_classes.rb
+++ b/spec/support/deprecated_classes.rb
@@ -11,7 +11,7 @@ def self.deprecated_classes
   def modified_tag_option(key, value, *rest)
     original_result = original_tag_option(key, value, *rest)
     return original_result unless key.to_s == 'class'
-    attribute, classes = original_result.split('=')
+    _attribute, classes = original_result.split('=')
     classes = classes.tr('"', '').split(/ +/)
     regex = self.class.deprecated_classes.find { |r| classes.any? { |c| r =~ c } }
     raise "CSS class '#{value}' matched regex for deprecated classes #{regex}" if regex
diff --git a/spec/support/features/document_capture_step_helper.rb b/spec/support/features/document_capture_step_helper.rb
index f09fb49e2df..cbff3582439 100644
--- a/spec/support/features/document_capture_step_helper.rb
+++ b/spec/support/features/document_capture_step_helper.rb
@@ -46,7 +46,7 @@ def simulate_image_upload_api_submission
     connection = Faraday.new(url: document_capture_endpoint_host) do |conn|
       conn.request(:multipart)
     end
-    response = connection.post document_capture_endpoint_path, image_upload_api_payload
+    connection.post document_capture_endpoint_path, image_upload_api_payload
     page.execute_script('document.querySelector(".js-document-capture-form").submit();')
   end
 
@@ -59,7 +59,7 @@ def document_capture_session_uuid
   end
 
   def document_capture_endpoint_uri
-    URI.parse(endpoint = document_capture_form['data-endpoint'])
+    URI.parse(document_capture_form['data-endpoint'])
   end
 
   def document_capture_endpoint_host
diff --git a/spec/support/shared_examples/sign_in.rb b/spec/support/shared_examples/sign_in.rb
index 40d203411d6..99792304e4d 100644
--- a/spec/support/shared_examples/sign_in.rb
+++ b/spec/support/shared_examples/sign_in.rb
@@ -62,7 +62,6 @@
 shared_examples 'signing in as IAL2 with personal key' do |sp|
   it 'does not present personal key as an MFA option', :email do
     user = create_ial2_account_go_back_to_sp_and_sign_out(sp)
-    pii = { ssn: '666-66-1234', dob: '1920-01-01', first_name: 'alice' }
 
     Capybara.reset_sessions!