     @meshblu = shmock done
 
   beforeEach ->
+    @nonce = Date.now()
     meshbluConfig = server: 'localhost', port: @meshblu.address().port
-    @sut = new Verifier {meshbluConfig, nonce: 'some-nonce'}
+    @sut = new Verifier {meshbluConfig, nonce: @nonce}
 
   afterEach (done) ->
     @meshblu.close done

          .reply(204)

        @whoamiUpdateHandler = @whoamiUpdateRequest
          .reply(200, uuid: 'device-uuid', type: 'meshblu:verifier', nonce: 'some-nonce')

        @unregisterHandler = @unregisterRequest
          .reply(500)

          .reply(204)

        @whoamiUpdateHandler = @whoamiUpdateRequest
          .reply(200, uuid: 'device-uuid', type: 'meshblu:verifier', nonce: @nonce)

        @unregisterHandler = @unregisterRequest
          .reply(204)
