diff --git a/lib/resque/integration/unique.rb b/lib/resque/integration/unique.rb
index f685fbf..9e87600 100644
--- a/lib/resque/integration/unique.rb
+++ b/lib/resque/integration/unique.rb
@@ -123,6 +123,10 @@ def enqueued?(*args)
           end
         end
 
+        def lock_timeout
+          3.days
+        end
+
         # Returns true if resque job is in locked state
         def locked?(*args)
           key = lock(nil, *args)
diff --git a/spec/resque/integration_spec.rb b/spec/resque/integration_spec.rb
index e45b015..f749d54 100644
--- a/spec/resque/integration_spec.rb
+++ b/spec/resque/integration_spec.rb
@@ -1,20 +1,62 @@
 # coding: utf-8
-
 require 'spec_helper'
 
-describe Resque::Integration, '#unique?' do
-  let(:job) { Class.new }
-  before { job.send :include, Resque::Integration }
+RSpec.describe Resque::Integration do
+  describe '#unique?' do
+    let(:job) { Class.new }
+    before { job.send :include, Resque::Integration }
+
+    subject { job }
+
+    context 'when #unique is not called' do
+      it { should_not be_unique }
+    end
 
-  subject { job }
+    context 'when #unique is called' do
+      before { job.unique }
 
-  context 'when #unique is not called' do
-    it { should_not be_unique }
+      it { should be_unique }
+    end
   end
 
-  context 'when #unique is called' do
-    before { job.unique }
+  describe 'enqueue' do
+    context 'when job is uniq' do
+      class UniqueJob
+        include Resque::Integration
+
+        queue :test
+        unique
+      end
+
+      it 'enqueues only one job' do
+        UniqueJob.enqueue(param: 'one')
+
+        Timecop.travel(10.hours.since) do
+          UniqueJob.enqueue(param: 'one')
+
+          expect(Resque.peek(:test, 0, 100).size).to eq(1)
+        end
+      end
+
+      it 'enqueues two jobs with differ args' do
+        UniqueJob.enqueue(param: 'one')
+
+        Timecop.travel(10.hours.since) do
+          UniqueJob.enqueue(param: 'two')
+
+          expect(Resque.peek(:test, 0, 100).size).to eq(2)
+        end
+      end
+
+      it 'enqueues two jobs after expire lock timeout' do
+        UniqueJob.enqueue(param: 'one')
+
+        Timecop.travel(4.days.since) do
+          UniqueJob.enqueue(param: 'one')
 
-    it { should be_unique }
+          expect(Resque.peek(:test, 0, 100).size).to eq(2)
+        end
+      end
+    end
   end
-end
\ No newline at end of file
+end