diff --git a/spec/fabricators/scheduled_expiration_status_fabricator.rb b/spec/fabricators/scheduled_expiration_status_fabricator.rb
new file mode 100644
index 00000000000000..9cbacc9b76583a
--- /dev/null
+++ b/spec/fabricators/scheduled_expiration_status_fabricator.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+Fabricator(:scheduled_expiration_status) do
+  account { Fabricate.build(:account) }
+  status { Fabricate.build(:status) }
+  scheduled_at { 20.hours.from_now }
+end
diff --git a/spec/services/update_status_expiration_service_spec.rb b/spec/services/update_status_expiration_service_spec.rb
new file mode 100644
index 00000000000000..a84a2913cb77f7
--- /dev/null
+++ b/spec/services/update_status_expiration_service_spec.rb
@@ -0,0 +1,74 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe UpdateStatusExpirationService do
+  subject { described_class.new.call(status) }
+
+  let(:status) { Fabricate(:status, text: text) }
+
+  shared_examples 'set expire date' do |offset|
+    it 'set expire date' do
+      travel_to '2023-01-01T00:00:00Z'
+      subject
+      expect(ScheduledExpirationStatus.where(status: status).count).to eq 1
+      expect(ScheduledExpirationStatus.exists?(scheduled_at: Time.now.utc + offset, status: status)).to be true
+    end
+  end
+
+  shared_examples 'did not set expire date' do
+    it 'did not set expire date' do
+      subject
+      expect(ScheduledExpirationStatus.exists?(status: status)).to be false
+    end
+  end
+
+  context 'when 30 minutes' do
+    let(:text) { 'ohagi #exp30m' }
+
+    it_behaves_like 'set expire date', 30.minutes
+  end
+
+  context 'when 1 hour' do
+    let(:text) { 'ohagi #exp1h' }
+
+    it_behaves_like 'set expire date', 1.hour
+  end
+
+  context 'with multiple tags' do
+    let(:text) { 'ohagi #exp3h #exp1d' }
+
+    it_behaves_like 'set expire date', 3.hours
+  end
+
+  context 'when too long hours' do
+    let(:text) { 'ohagi #exp9999999999h' }
+
+    it_behaves_like 'did not set expire date'
+  end
+
+  context 'without tags' do
+    let(:text) { 'ohagi is ohagi' }
+
+    it_behaves_like 'did not set expire date'
+  end
+
+  context 'when update status text' do
+    before do
+      travel_to '2023-01-01T00:00:00Z'
+      Fabricate(:scheduled_expiration_status, account: status.account, status: status)
+    end
+
+    context 'with new date' do
+      let(:text) { 'ohagi #exp1h' }
+
+      it_behaves_like 'set expire date', 1.hour
+    end
+
+    context 'without new date' do
+      let(:text) { 'ohagi' }
+
+      it_behaves_like 'did not set expire date'
+    end
+  end
+end