diff --git a/spec/models/relay_spec.rb b/spec/models/relay_spec.rb
index 4b95c596e4..9c917e2d2e 100644
--- a/spec/models/relay_spec.rb
+++ b/spec/models/relay_spec.rb
@@ -8,4 +8,95 @@ RSpec.describe Relay do
       it { is_expected.to normalize(:inbox_url).from('  http://host.example  ').to('http://host.example') }
     end
   end
+
+  describe 'Validations' do
+    it { is_expected.to validate_presence_of(:inbox_url) }
+    it { is_expected.to validate_uniqueness_of(:inbox_url) }
+  end
+
+  describe 'Enumerations' do
+    it { is_expected.to define_enum_for(:state) }
+  end
+
+  describe 'Scopes' do
+    describe 'enabled' do
+      let!(:accepted_relay) { Fabricate :relay, state: :accepted }
+      let!(:pending_relay) { Fabricate :relay, state: :pending }
+
+      it 'returns records in accepted state' do
+        expect(described_class.enabled)
+          .to include(accepted_relay)
+          .and not_include(pending_relay)
+      end
+    end
+  end
+
+  describe 'Callbacks' do
+    describe 'Ensure disabled on destroy' do
+      before { stub_delivery_worker }
+
+      context 'when relay is enabled' do
+        let(:relay) { Fabricate :relay, state: :accepted }
+
+        it 'sends undo when destroying the record' do
+          relay.destroy!
+
+          expect(ActivityPub::DeliveryWorker)
+            .to have_received(:perform_async).with(match('Undo'), Account.representative.id, relay.inbox_url)
+        end
+      end
+
+      context 'when relay is not enabled' do
+        let(:relay) { Fabricate :relay, state: :pending }
+
+        it 'sends undo when destroying the record' do
+          relay.destroy!
+
+          expect(ActivityPub::DeliveryWorker)
+            .to_not have_received(:perform_async)
+        end
+      end
+    end
+  end
+
+  describe '#to_log_human_identifier' do
+    subject { relay.to_log_human_identifier }
+
+    let(:relay) { Fabricate.build :relay, inbox_url: }
+    let(:inbox_url) { 'https://host.example' }
+
+    it { is_expected.to eq(inbox_url) }
+  end
+
+  describe '#disable' do
+    let(:relay) { Fabricate :relay, state: :accepted, follow_activity_id: 'https://host.example/123' }
+
+    before { stub_delivery_worker }
+
+    it 'changes state to idle and removes the activity id' do
+      expect { relay.disable! }
+        .to change { relay.reload.state }.to('idle')
+        .and change { relay.reload.follow_activity_id }.to(be_nil)
+      expect(ActivityPub::DeliveryWorker)
+        .to have_received(:perform_async).with(match('Undo'), Account.representative.id, relay.inbox_url)
+    end
+  end
+
+  describe '#enable' do
+    let(:relay) { Fabricate :relay, state: :idle, follow_activity_id: '' }
+
+    before { stub_delivery_worker }
+
+    it 'changes state to pending and populates the activity id' do
+      expect { relay.enable! }
+        .to change { relay.reload.state }.to('pending')
+        .and change { relay.reload.follow_activity_id }.to(be_present)
+      expect(ActivityPub::DeliveryWorker)
+        .to have_received(:perform_async).with(match('Follow'), Account.representative.id, relay.inbox_url)
+    end
+  end
+
+  def stub_delivery_worker
+    allow(ActivityPub::DeliveryWorker).to receive(:perform_async)
+  end
 end