diff --git a/spec/models/ci/build_metadata_spec.rb b/spec/models/ci/build_metadata_spec.rb
index 6dba132184c..519968b9e48 100644
--- a/spec/models/ci/build_metadata_spec.rb
+++ b/spec/models/ci/build_metadata_spec.rb
@@ -15,6 +15,8 @@ describe Ci::BuildMetadata do
   let(:build) { create(:ci_build, pipeline: pipeline) }
   let(:build_metadata) { build.metadata }
 
+  it_behaves_like 'having unique enum values'
+
   describe '#update_timeout_state' do
     subject { build_metadata }
 
diff --git a/spec/models/ci/build_trace_chunk_spec.rb b/spec/models/ci/build_trace_chunk_spec.rb
index 859287bb0c8..d214fdf369a 100644
--- a/spec/models/ci/build_trace_chunk_spec.rb
+++ b/spec/models/ci/build_trace_chunk_spec.rb
@@ -12,6 +12,8 @@ describe Ci::BuildTraceChunk, :clean_gitlab_redis_shared_state do
     described_class.new(build: build, chunk_index: chunk_index, data_store: data_store, raw_data: raw_data)
   end
 
+  it_behaves_like 'having unique enum values'
+
   before do
     stub_feature_flags(ci_enable_live_trace: true)
     stub_artifacts_object_storage
diff --git a/spec/models/ci/job_artifact_spec.rb b/spec/models/ci/job_artifact_spec.rb
index fb5bec4108a..c68ba02b8de 100644
--- a/spec/models/ci/job_artifact_spec.rb
+++ b/spec/models/ci/job_artifact_spec.rb
@@ -15,6 +15,8 @@ describe Ci::JobArtifact do
   it { is_expected.to delegate_method(:open).to(:file) }
   it { is_expected.to delegate_method(:exists?).to(:file) }
 
+  it_behaves_like 'having unique enum values'
+
   describe '.test_reports' do
     subject { described_class.test_reports }
 
diff --git a/spec/models/ci/pipeline_spec.rb b/spec/models/ci/pipeline_spec.rb
index 9e6146b8a44..3fe351e78d5 100644
--- a/spec/models/ci/pipeline_spec.rb
+++ b/spec/models/ci/pipeline_spec.rb
@@ -8,6 +8,8 @@ describe Ci::Pipeline, :mailer do
     create(:ci_empty_pipeline, status: :created, project: project)
   end
 
+  it_behaves_like 'having unique enum values'
+
   it { is_expected.to belong_to(:project) }
   it { is_expected.to belong_to(:user) }
   it { is_expected.to belong_to(:auto_canceled_by) }
diff --git a/spec/models/ci/runner_spec.rb b/spec/models/ci/runner_spec.rb
index b545e036aa1..ad79f8d4ce0 100644
--- a/spec/models/ci/runner_spec.rb
+++ b/spec/models/ci/runner_spec.rb
@@ -1,6 +1,8 @@
 require 'spec_helper'
 
 describe Ci::Runner do
+  it_behaves_like 'having unique enum values'
+
   describe 'validation' do
     it { is_expected.to validate_presence_of(:access_level) }
     it { is_expected.to validate_presence_of(:runner_type) }
diff --git a/spec/models/ci/stage_spec.rb b/spec/models/ci/stage_spec.rb
index 5076f7faeac..3228c400155 100644
--- a/spec/models/ci/stage_spec.rb
+++ b/spec/models/ci/stage_spec.rb
@@ -3,6 +3,8 @@ require 'spec_helper'
 describe Ci::Stage, :models do
   let(:stage) { create(:ci_stage_entity) }
 
+  it_behaves_like 'having unique enum values'
+
   describe 'associations' do
     before do
       create(:ci_build, stage_id: stage.id)
diff --git a/spec/models/clusters/applications/ingress_spec.rb b/spec/models/clusters/applications/ingress_spec.rb
index cfe0e216c78..cd28f1fe9c6 100644
--- a/spec/models/clusters/applications/ingress_spec.rb
+++ b/spec/models/clusters/applications/ingress_spec.rb
@@ -3,6 +3,8 @@ require 'rails_helper'
 describe Clusters::Applications::Ingress do
   let(:ingress) { create(:clusters_applications_ingress) }
 
+  it_behaves_like 'having unique enum values'
+
   include_examples 'cluster application core specs', :clusters_applications_ingress
   include_examples 'cluster application status specs', :clusters_applications_ingress
   include_examples 'cluster application helm specs', :clusters_applications_ingress
diff --git a/spec/models/clusters/cluster_spec.rb b/spec/models/clusters/cluster_spec.rb
index eb68ebccdcb..7dcf97276b2 100644
--- a/spec/models/clusters/cluster_spec.rb
+++ b/spec/models/clusters/cluster_spec.rb
@@ -3,6 +3,8 @@
 require 'spec_helper'
 
 describe Clusters::Cluster do
+  it_behaves_like 'having unique enum values'
+
   it { is_expected.to belong_to(:user) }
   it { is_expected.to have_many(:cluster_projects) }
   it { is_expected.to have_many(:projects) }
diff --git a/spec/models/clusters/platforms/kubernetes_spec.rb b/spec/models/clusters/platforms/kubernetes_spec.rb
index 28019eab320..062d2fd0768 100644
--- a/spec/models/clusters/platforms/kubernetes_spec.rb
+++ b/spec/models/clusters/platforms/kubernetes_spec.rb
@@ -18,6 +18,8 @@ describe Clusters::Platforms::Kubernetes, :use_clean_rails_memory_store_caching
   it { is_expected.to delegate_method(:managed?).to(:cluster) }
   it { is_expected.to delegate_method(:kubernetes_namespace).to(:cluster) }
 
+  it_behaves_like 'having unique enum values'
+
   describe 'before_validation' do
     context 'when namespace includes upper case' do
       let(:kubernetes) { create(:cluster_platform_kubernetes, :configured, namespace: namespace) }
diff --git a/spec/models/commit_status_spec.rb b/spec/models/commit_status_spec.rb
index 917685399d4..8b7c88805c1 100644
--- a/spec/models/commit_status_spec.rb
+++ b/spec/models/commit_status_spec.rb
@@ -13,6 +13,8 @@ describe CommitStatus do
     create(:commit_status, pipeline: pipeline, **opts)
   end
 
+  it_behaves_like 'having unique enum values'
+
   it { is_expected.to belong_to(:pipeline) }
   it { is_expected.to belong_to(:user) }
   it { is_expected.to belong_to(:project) }
diff --git a/spec/models/deployment_spec.rb b/spec/models/deployment_spec.rb
index 270b2767c68..a8d53cfcd7d 100644
--- a/spec/models/deployment_spec.rb
+++ b/spec/models/deployment_spec.rb
@@ -16,6 +16,8 @@ describe Deployment do
   it { is_expected.to validate_presence_of(:ref) }
   it { is_expected.to validate_presence_of(:sha) }
 
+  it_behaves_like 'having unique enum values'
+
   describe '#scheduled_actions' do
     subject { deployment.scheduled_actions }
 
diff --git a/spec/models/gpg_signature_spec.rb b/spec/models/gpg_signature_spec.rb
index 0136bb61c07..cdd7dea2064 100644
--- a/spec/models/gpg_signature_spec.rb
+++ b/spec/models/gpg_signature_spec.rb
@@ -8,6 +8,8 @@ RSpec.describe GpgSignature do
   let(:gpg_key) { create(:gpg_key) }
   let(:gpg_key_subkey) { create(:gpg_key_subkey) }
 
+  it_behaves_like 'having unique enum values'
+
   describe 'associations' do
     it { is_expected.to belong_to(:project) }
     it { is_expected.to belong_to(:gpg_key) }
diff --git a/spec/models/internal_id_spec.rb b/spec/models/internal_id_spec.rb
index 52c00a74b4b..4696341c05f 100644
--- a/spec/models/internal_id_spec.rb
+++ b/spec/models/internal_id_spec.rb
@@ -7,6 +7,8 @@ describe InternalId do
   let(:scope) { { project: project } }
   let(:init) { ->(s) { s.project.issues.size } }
 
+  it_behaves_like 'having unique enum values'
+
   context 'validations' do
     it { is_expected.to validate_presence_of(:usage) }
   end
diff --git a/spec/models/list_spec.rb b/spec/models/list_spec.rb
index 17dc27bd132..a51580f8292 100644
--- a/spec/models/list_spec.rb
+++ b/spec/models/list_spec.rb
@@ -1,6 +1,8 @@
 require 'rails_helper'
 
 describe List do
+  it_behaves_like 'having unique enum values'
+
   describe 'relationships' do
     it { is_expected.to belong_to(:board) }
     it { is_expected.to belong_to(:label) }
diff --git a/spec/models/notification_setting_spec.rb b/spec/models/notification_setting_spec.rb
index e545b674b4f..771d834c4bc 100644
--- a/spec/models/notification_setting_spec.rb
+++ b/spec/models/notification_setting_spec.rb
@@ -1,6 +1,8 @@
 require 'rails_helper'
 
 RSpec.describe NotificationSetting do
+  it_behaves_like 'having unique enum values'
+
   describe "Associations" do
     it { is_expected.to belong_to(:user) }
     it { is_expected.to belong_to(:source) }
diff --git a/spec/models/project_auto_devops_spec.rb b/spec/models/project_auto_devops_spec.rb
index 342798f730b..7ff64c76e37 100644
--- a/spec/models/project_auto_devops_spec.rb
+++ b/spec/models/project_auto_devops_spec.rb
@@ -3,6 +3,8 @@ require 'spec_helper'
 describe ProjectAutoDevops do
   set(:project) { build(:project) }
 
+  it_behaves_like 'having unique enum values'
+
   it { is_expected.to belong_to(:project) }
 
   it { is_expected.to define_enum_for(:deploy_strategy) }
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index af5b0939ca2..3f99fd12e38 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -4,6 +4,8 @@ describe Project do
   include ProjectForksHelper
   include GitHelpers
 
+  it_behaves_like 'having unique enum values'
+
   describe 'associations' do
     it { is_expected.to belong_to(:group) }
     it { is_expected.to belong_to(:namespace) }
diff --git a/spec/models/prometheus_metric_spec.rb b/spec/models/prometheus_metric_spec.rb
index a83a31ae88c..3692fe9a559 100644
--- a/spec/models/prometheus_metric_spec.rb
+++ b/spec/models/prometheus_metric_spec.rb
@@ -6,6 +6,8 @@ describe PrometheusMetric do
   subject { build(:prometheus_metric) }
   let(:other_project) { build(:project) }
 
+  it_behaves_like 'having unique enum values'
+
   it { is_expected.to belong_to(:project) }
   it { is_expected.to validate_presence_of(:title) }
   it { is_expected.to validate_presence_of(:query) }
diff --git a/spec/models/push_event_payload_spec.rb b/spec/models/push_event_payload_spec.rb
index a049ad35584..69a4922b6fd 100644
--- a/spec/models/push_event_payload_spec.rb
+++ b/spec/models/push_event_payload_spec.rb
@@ -1,6 +1,8 @@
 require 'spec_helper'
 
 describe PushEventPayload do
+  it_behaves_like 'having unique enum values'
+
   describe 'saving payloads' do
     it 'does not allow commit messages longer than 70 characters' do
       event = create(:push_event)
diff --git a/spec/models/resource_label_event_spec.rb b/spec/models/resource_label_event_spec.rb
index da6e1b5610d..e7e3f7376e6 100644
--- a/spec/models/resource_label_event_spec.rb
+++ b/spec/models/resource_label_event_spec.rb
@@ -7,6 +7,8 @@ RSpec.describe ResourceLabelEvent, type: :model do
   let(:issue) { create(:issue) }
   let(:merge_request) { create(:merge_request) }
 
+  it_behaves_like 'having unique enum values'
+
   describe 'associations' do
     it { is_expected.to belong_to(:user) }
     it { is_expected.to belong_to(:issue) }
diff --git a/spec/models/user_callout_spec.rb b/spec/models/user_callout_spec.rb
index 64ba17c81fe..d54355afe12 100644
--- a/spec/models/user_callout_spec.rb
+++ b/spec/models/user_callout_spec.rb
@@ -3,6 +3,8 @@ require 'rails_helper'
 describe UserCallout do
   let!(:callout) { create(:user_callout) }
 
+  it_behaves_like 'having unique enum values'
+
   describe 'relationships' do
     it { is_expected.to belong_to(:user) }
   end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 7bd6dccd0ad..e5490e0a156 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -4,6 +4,8 @@ describe User do
   include ProjectForksHelper
   include TermsHelper
 
+  it_behaves_like 'having unique enum values'
+
   describe 'modules' do
     subject { described_class }
 
diff --git a/spec/support/active_record_enum.rb b/spec/support/active_record_enum.rb
new file mode 100644
index 00000000000..fb1189c7f17
--- /dev/null
+++ b/spec/support/active_record_enum.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+shared_examples 'having unique enum values' do
+  described_class.defined_enums.each do |name, enum|
+    it "has unique values in #{name.inspect}" do
+      duplicated = enum.group_by(&:last).select { |key, value| value.size > 1 }
+
+      expect(duplicated).to be_empty,
+        "Duplicated values detected: #{duplicated.values.map(&Hash.method(:[]))}"
+    end
+  end
+end