diff --git a/.rubocop_todo/gitlab/namespaced_class.yml b/.rubocop_todo/gitlab/namespaced_class.yml
index 0ec0bc6686974674f54bf7f1a3499fad73d96f39..4f5d5ab3a80dce62562d0f01f294f8f4e6cc3b71 100644
--- a/.rubocop_todo/gitlab/namespaced_class.yml
+++ b/.rubocop_todo/gitlab/namespaced_class.yml
@@ -307,6 +307,7 @@ Gitlab/NamespacedClass:
     - 'app/models/service_desk_setting.rb'
     - 'app/models/service_list.rb'
     - 'app/models/shard.rb'
+    - 'app/models/slack_integration.rb'
     - 'app/models/snippet.rb'
     - 'app/models/snippet_blob.rb'
     - 'app/models/snippet_input_action.rb'
@@ -938,7 +939,6 @@ Gitlab/NamespacedClass:
     - 'ee/app/models/scim_identity.rb'
     - 'ee/app/models/scim_oauth_access_token.rb'
     - 'ee/app/models/scoped_label_set.rb'
-    - 'ee/app/models/slack_integration.rb'
     - 'ee/app/models/smartcard_identity.rb'
     - 'ee/app/models/software_license.rb'
     - 'ee/app/models/software_license_policy.rb'
diff --git a/.rubocop_todo/layout/argument_alignment.yml b/.rubocop_todo/layout/argument_alignment.yml
index 4fda4e8f2b6b0daa119e527afd73e66679305b1f..b39f2181ceea6d0f7e6ba78db523932640fa146a 100644
--- a/.rubocop_todo/layout/argument_alignment.yml
+++ b/.rubocop_todo/layout/argument_alignment.yml
@@ -1118,7 +1118,6 @@ Layout/ArgumentAlignment:
     - 'ee/app/models/scim_identity.rb'
     - 'ee/app/models/security/finding.rb'
     - 'ee/app/models/security/orchestration_policy_rule_schedule.rb'
-    - 'ee/app/models/slack_integration.rb'
     - 'ee/app/models/smartcard_identity.rb'
     - 'ee/app/models/status_page/project_setting.rb'
     - 'ee/app/models/vulnerabilities/external_issue_link.rb'
diff --git a/.rubocop_todo/layout/space_in_lambda_literal.yml b/.rubocop_todo/layout/space_in_lambda_literal.yml
index 144b4eb04a7969da044fa620c2846a6a9e0423c1..7c914f47443d70410dad73e3c1efc587458175ed 100644
--- a/.rubocop_todo/layout/space_in_lambda_literal.yml
+++ b/.rubocop_todo/layout/space_in_lambda_literal.yml
@@ -233,7 +233,6 @@ Layout/SpaceInLambdaLiteral:
     - 'ee/app/models/security/scan.rb'
     - 'ee/app/models/security/training.rb'
     - 'ee/app/models/security/training_provider.rb'
-    - 'ee/app/models/slack_integration.rb'
     - 'ee/app/models/software_license.rb'
     - 'ee/app/models/software_license_policy.rb'
     - 'ee/app/models/vulnerabilities/external_issue_link.rb'
diff --git a/.rubocop_todo/lint/unused_block_argument.yml b/.rubocop_todo/lint/unused_block_argument.yml
index a70c3823c1dbb4a31099def9061bc87bfaacdee3..f4c0ddf38cf801f93b69636492e8b5d5bdbf34d6 100644
--- a/.rubocop_todo/lint/unused_block_argument.yml
+++ b/.rubocop_todo/lint/unused_block_argument.yml
@@ -135,7 +135,6 @@ Lint/UnusedBlockArgument:
     - 'ee/spec/factories/projects.rb'
     - 'ee/spec/factories/protected_branches.rb'
     - 'ee/spec/factories/protected_environments.rb'
-    - 'ee/spec/factories/slack_integrations.rb'
     - 'ee/spec/factories/users.rb'
     - 'ee/spec/features/groups/group_settings_spec.rb'
     - 'ee/spec/graphql/mutations/dast/profiles/update_spec.rb'
diff --git a/.rubocop_todo/rails/inverse_of.yml b/.rubocop_todo/rails/inverse_of.yml
index de45a47fed6c1f8a2148162dc2116e2bae6bc409..412d28a11da7a35f433eee6029d8b78a7d9c5abe 100644
--- a/.rubocop_todo/rails/inverse_of.yml
+++ b/.rubocop_todo/rails/inverse_of.yml
@@ -76,7 +76,6 @@ Rails/InverseOf:
     - 'ee/app/models/incident_management/escalation_rule.rb'
     - 'ee/app/models/incident_management/oncall_participant.rb'
     - 'ee/app/models/insight.rb'
-    - 'ee/app/models/integrations/gitlab_slack_application.rb'
     - 'ee/app/models/iteration.rb'
     - 'ee/app/models/requirements_management/requirement.rb'
     - 'ee/app/models/requirements_management/test_report.rb'
diff --git a/.rubocop_todo/rspec/missing_feature_category.yml b/.rubocop_todo/rspec/missing_feature_category.yml
index 6fa47e8788fba50c3f12b258d23a1be4ccf62799..150eb5cc9294252c582aa8aeab595399933cd173 100644
--- a/.rubocop_todo/rspec/missing_feature_category.yml
+++ b/.rubocop_todo/rspec/missing_feature_category.yml
@@ -1036,7 +1036,6 @@ RSpec/MissingFeatureCategory:
     - 'ee/spec/lib/quality/seeders/vulnerabilities_spec.rb'
     - 'ee/spec/lib/sidebars/groups/menus/analytics_menu_spec.rb'
     - 'ee/spec/lib/sidebars/groups/menus/security_compliance_menu_spec.rb'
-    - 'ee/spec/lib/slack/api_spec.rb'
     - 'ee/spec/lib/slack/block_kit/app_home_opened_spec.rb'
     - 'ee/spec/lib/slack/block_kit/incident_management/incident_modal_opened_spec.rb'
     - 'ee/spec/lib/system_check/app/search_check_spec.rb'
diff --git a/.rubocop_todo/style/numbered_parameters.yml b/.rubocop_todo/style/numbered_parameters.yml
index 3251cc0bcad1d5f61eaa1eb84cf78e561843013e..aa3df93ab8f7724f9ee066406aeb2334e15921d8 100644
--- a/.rubocop_todo/style/numbered_parameters.yml
+++ b/.rubocop_todo/style/numbered_parameters.yml
@@ -25,7 +25,6 @@ Style/NumberedParameters:
     - 'app/services/web_hooks/log_execution_service.rb'
     - 'ee/app/models/ee/project.rb'
     - 'ee/app/models/security/finding.rb'
-    - 'ee/app/models/slack_integration.rb'
     - 'ee/app/models/vulnerabilities/feedback.rb'
     - 'ee/app/services/security/ingestion/tasks/hooks_execution.rb'
     - 'ee/app/services/security/ingestion/tasks/ingest_remediations.rb'
diff --git a/ee/app/models/integrations/gitlab_slack_application.rb b/app/models/integrations/gitlab_slack_application.rb
similarity index 98%
rename from ee/app/models/integrations/gitlab_slack_application.rb
rename to app/models/integrations/gitlab_slack_application.rb
index 006b6ee456ab1b64bf85af3de507a0d74b00bf69..b0f54f39e8cf3f937fb55949a17dbabad4e1fab6 100644
--- a/ee/app/models/integrations/gitlab_slack_application.rb
+++ b/app/models/integrations/gitlab_slack_application.rb
@@ -17,7 +17,7 @@ class GitlabSlackApplication < BaseSlackNotification
     attribute :vulnerability_events, default: false
     attribute :wiki_page_events, default: false
 
-    has_one :slack_integration, foreign_key: :integration_id
+    has_one :slack_integration, foreign_key: :integration_id, inverse_of: :integration
     delegate :bot_access_token, :bot_user_id, to: :slack_integration, allow_nil: true
 
     def update_active_status
diff --git a/ee/app/models/integrations/slack_workspace/api_scope.rb b/app/models/integrations/slack_workspace/api_scope.rb
similarity index 100%
rename from ee/app/models/integrations/slack_workspace/api_scope.rb
rename to app/models/integrations/slack_workspace/api_scope.rb
diff --git a/ee/app/models/integrations/slack_workspace/integration_api_scope.rb b/app/models/integrations/slack_workspace/integration_api_scope.rb
similarity index 100%
rename from ee/app/models/integrations/slack_workspace/integration_api_scope.rb
rename to app/models/integrations/slack_workspace/integration_api_scope.rb
diff --git a/ee/app/models/slack_integration.rb b/app/models/slack_integration.rb
similarity index 86%
rename from ee/app/models/slack_integration.rb
rename to app/models/slack_integration.rb
index 390100deebfa4e324c61a0ad3764121de1e25078..22e911aeacd32d611eb3645fb9a2acba087f7aa0 100644
--- a/ee/app/models/slack_integration.rb
+++ b/app/models/slack_integration.rb
@@ -31,13 +31,13 @@ class SlackIntegration < ApplicationRecord
     through: :slack_integrations_scopes
 
   scope :with_bot, -> { where.not(bot_user_id: nil) }
-  scope :by_team, -> (team_id) { where(team_id: team_id) }
+  scope :by_team, ->(team_id) { where(team_id: team_id) }
 
   validates :team_id, presence: true
   validates :team_name, presence: true
   validates :alias, presence: true,
-                    uniqueness: { scope: :team_id, message: 'This alias has already been taken' },
-                    length: 2..4096
+    uniqueness: { scope: :team_id, message: 'This alias has already been taken' },
+    length: 2..4096
   validates :user_id, presence: true
   validates :integration, presence: true
 
@@ -65,11 +65,11 @@ def upgrade_needed?
   end
 
   def all_features_supported?
-    ALL_FEATURES.all? { feature_available?(_1) } # rubocop: disable Gitlab/FeatureAvailableUsage
+    ALL_FEATURES.all? { |feature| feature_available?(feature) } # rubocop: disable Gitlab/FeatureAvailableUsage
   end
 
   def authorized_scope_names=(names)
-    names = Array.wrap(names).flat_map { _1.split(',') }.map(&:strip)
+    names = Array.wrap(names).flat_map { |name| name.split(',') }.map(&:strip)
 
     scopes = ::Integrations::SlackWorkspace::ApiScope.find_or_initialize_by_names(names)
     self.slack_api_scopes = scopes
diff --git a/ee/spec/factories/integrations.rb b/ee/spec/factories/integrations.rb
index 37c9e149df12aade385dfd399f4bcd13973509d4..ee13feafc66654c62cd7ebec51268f302b3c63b2 100644
--- a/ee/spec/factories/integrations.rb
+++ b/ee/spec/factories/integrations.rb
@@ -1,29 +1,6 @@
 # frozen_string_literal: true
 
 FactoryBot.define do
-  factory :gitlab_slack_application_integration, class: 'Integrations::GitlabSlackApplication' do
-    project
-    active { true }
-    type { 'Integrations::GitlabSlackApplication' }
-    slack_integration { association :slack_integration, integration: instance }
-
-    transient do
-      all_channels { true }
-    end
-
-    after(:build) do |integration, evaluator|
-      next unless evaluator.all_channels
-
-      integration.event_channel_names.each do |name|
-        integration.send("#{name}=".to_sym, "##{name}")
-      end
-    end
-
-    trait :all_features_supported do
-      slack_integration { association :slack_integration, :all_features_supported, integration: instance }
-    end
-  end
-
   factory :github_integration, class: 'Integrations::Github' do
     project
     type { 'Integrations::Github' }
diff --git a/ee/lib/slack/api.rb b/lib/slack/api.rb
similarity index 100%
rename from ee/lib/slack/api.rb
rename to lib/slack/api.rb
diff --git a/spec/factories/integrations.rb b/spec/factories/integrations.rb
index d765e5562b6915738b261ef10455d412ff8ce1f6..0b940c552e57dc03b7dec099a599f495a4e4ba2b 100644
--- a/spec/factories/integrations.rb
+++ b/spec/factories/integrations.rb
@@ -43,6 +43,29 @@
     end
   end
 
+  factory :gitlab_slack_application_integration, class: 'Integrations::GitlabSlackApplication' do
+    project
+    active { true }
+    type { 'Integrations::GitlabSlackApplication' }
+    slack_integration { association :slack_integration, integration: instance }
+
+    transient do
+      all_channels { true }
+    end
+
+    after(:build) do |integration, evaluator|
+      next unless evaluator.all_channels
+
+      integration.event_channel_names.each do |name|
+        integration.send("#{name}=".to_sym, "##{name}")
+      end
+    end
+
+    trait :all_features_supported do
+      slack_integration { association :slack_integration, :all_features_supported, integration: instance }
+    end
+  end
+
   factory :packagist_integration, class: 'Integrations::Packagist' do
     project
     type { 'Integrations::Packagist' }
diff --git a/ee/spec/factories/slack_integrations.rb b/spec/factories/slack_integrations.rb
similarity index 93%
rename from ee/spec/factories/slack_integrations.rb
rename to spec/factories/slack_integrations.rb
index bffafa644a9ebb00598d6689646132eaa0b38432..a43ba8e7453f13fced4e3296752377da589cd5f1 100644
--- a/ee/spec/factories/slack_integrations.rb
+++ b/spec/factories/slack_integrations.rb
@@ -17,7 +17,7 @@
     end
 
     trait :all_features_supported do
-      after(:build) do |slack_integration, evaluator|
+      after(:build) do |slack_integration, _evaluator|
         slack_integration.authorized_scope_names = %w[commands chat:write chat:write.public]
       end
     end
diff --git a/ee/spec/lib/slack/api_spec.rb b/spec/lib/slack/api_spec.rb
similarity index 94%
rename from ee/spec/lib/slack/api_spec.rb
rename to spec/lib/slack/api_spec.rb
index 29b6a055bd3f81f06af02de3830d103828ec1782..360e02841640ad793b53a28b75e7f6ec0ee4ff53 100644
--- a/ee/spec/lib/slack/api_spec.rb
+++ b/spec/lib/slack/api_spec.rb
@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe Slack::API do
+RSpec.describe Slack::API, feature_category: :integrations do
   describe '#post' do
     let(:slack_installation) { build(:slack_integration) }
     let(:api_method) { 'api_method_call' }
diff --git a/ee/spec/models/integrations/gitlab_slack_application_spec.rb b/spec/models/integrations/gitlab_slack_application_spec.rb
similarity index 100%
rename from ee/spec/models/integrations/gitlab_slack_application_spec.rb
rename to spec/models/integrations/gitlab_slack_application_spec.rb
diff --git a/ee/spec/models/integrations/slack_workspace/api_scope_spec.rb b/spec/models/integrations/slack_workspace/api_scope_spec.rb
similarity index 100%
rename from ee/spec/models/integrations/slack_workspace/api_scope_spec.rb
rename to spec/models/integrations/slack_workspace/api_scope_spec.rb
diff --git a/ee/spec/models/slack_integration_spec.rb b/spec/models/slack_integration_spec.rb
similarity index 100%
rename from ee/spec/models/slack_integration_spec.rb
rename to spec/models/slack_integration_spec.rb