diff --git a/heat/tests/test_engine_service.py b/heat/tests/test_engine_service.py
index 5d163dd86..13aaff953 100644
--- a/heat/tests/test_engine_service.py
+++ b/heat/tests/test_engine_service.py
@@ -865,6 +865,41 @@ class StackServiceAdoptUpdateTest(common.HeatTestCase):
                              tmpl.env.params)
             self.assertEqual(stack.identifier(), result)
 
+    def test_stack_update_existing_parameters_remove(self):
+        '''Use a template with existing parameters, then update with a
+        template containing additional paramters and a list of
+        parameters to be removed.
+        '''
+        stack_name = 'service_update_test_stack_existing_parameters'
+        update_params = {'encrypted_param_names': [],
+                         'parameter_defaults': {},
+                         'parameters': {'newparam': 123},
+                         'resource_registry': {'resources': {}}}
+        api_args = {rpc_api.PARAM_TIMEOUT: 60,
+                    rpc_api.PARAM_EXISTING: True,
+                    rpc_api.PARAM_CLEAR_PARAMETERS: ['removeme']}
+        t = template_format.parse(tools.wp_template)
+        t['parameters']['removeme'] = {'type': 'string'}
+
+        stack = utils.parse_stack(t, stack_name=stack_name,
+                                  params={'KeyName': 'test',
+                                          'removeme': 'foo'})
+        stack.set_stack_user_project_id('1234')
+        self.assertEqual({'KeyName': 'test', 'removeme': 'foo'},
+                         stack.t.env.params)
+
+        with mock.patch('heat.engine.stack.Stack') as mock_stack:
+            mock_stack.load.return_value = stack
+            mock_stack.validate.return_value = None
+            result = self.man.update_stack(self.ctx, stack.identifier(),
+                                           t,
+                                           update_params,
+                                           None, api_args)
+            tmpl = mock_stack.call_args[0][2]
+            self.assertEqual({'KeyName': 'test', 'newparam': 123},
+                             tmpl.env.params)
+            self.assertEqual(stack.identifier(), result)
+
     def test_stack_update_reuses_api_params(self):
         stack_name = 'service_update_test_stack'
         params = {'foo': 'bar'}