diff --git a/qinling/engine/default_engine.py b/qinling/engine/default_engine.py
index 5768a942..5e3a82c5 100644
--- a/qinling/engine/default_engine.py
+++ b/qinling/engine/default_engine.py
@@ -33,8 +33,7 @@ class DefaultEngine(object):
         self.session = requests.Session()
 
     def create_runtime(self, ctx, runtime_id):
-        LOG.info('Start to create.',
-                 resource={'type': 'runtime', 'id': runtime_id})
+        LOG.info('Start to create runtime %s.', runtime_id)
 
         with db_api.transaction():
             runtime = db_api.get_runtime(runtime_id)
@@ -47,6 +46,7 @@ class DefaultEngine(object):
                     labels=labels,
                 )
                 runtime.status = status.AVAILABLE
+                LOG.info('Runtime %s created.', runtime_id)
             except Exception as e:
                 LOG.exception(
                     'Failed to create pool for runtime %s. Error: %s',
@@ -56,18 +56,19 @@ class DefaultEngine(object):
                 runtime.status = status.ERROR
 
     def delete_runtime(self, ctx, runtime_id):
-        resource = {'type': 'runtime', 'id': runtime_id}
-        LOG.info('Start to delete.', resource=resource)
+        LOG.info('Start to delete runtime %s.', runtime_id)
 
         labels = {'runtime_id': runtime_id}
         self.orchestrator.delete_pool(runtime_id, labels=labels)
         db_api.delete_runtime(runtime_id)
 
-        LOG.info('Deleted.', resource=resource)
+        LOG.info('Deleted runtime %s.', runtime_id)
 
     def update_runtime(self, ctx, runtime_id, image=None, pre_image=None):
-        resource = {'type': 'runtime', 'id': runtime_id}
-        LOG.info('Start to update, image=%s', image, resource=resource)
+        LOG.info(
+            'Start to update runtime %s, image: %s, pre_image: %s',
+            runtime_id, image, pre_image
+        )
 
         labels = {'runtime_id': runtime_id}
         ret = self.orchestrator.update_pool(
@@ -78,12 +79,12 @@ class DefaultEngine(object):
             values = {'status': status.AVAILABLE}
             db_api.update_runtime(runtime_id, values)
 
-            LOG.info('Updated.', resource=resource)
+            LOG.info('Updated runtime %s.', runtime_id)
         else:
             values = {'status': status.AVAILABLE, 'image': pre_image}
             db_api.update_runtime(runtime_id, values)
 
-            LOG.info('Rollbacked.', resource=resource)
+            LOG.info('Rollbacked runtime %s.', runtime_id)
 
     @tenacity.retry(
         wait=tenacity.wait_fixed(1),
@@ -216,13 +217,12 @@ class DefaultEngine(object):
 
     def delete_function(self, ctx, function_id):
         """Deletes underlying resources allocated for function."""
-        resource = {'type': 'function', 'id': function_id}
-        LOG.info('Start to delete.', resource=resource)
+        LOG.info('Start to delete function %s.', function_id)
 
         labels = {'function_id': function_id}
         self.orchestrator.delete_function(function_id, labels=labels)
 
-        LOG.info('Deleted.', resource=resource)
+        LOG.info('Deleted function %s.', function_id)
 
     def scaleup_function(self, ctx, function_id, runtime_id, count=1):
         worker_names, service_url = self.orchestrator.scaleup_function(
diff --git a/qinling/services/periodics.py b/qinling/services/periodics.py
index 849a4536..28e1b493 100644
--- a/qinling/services/periodics.py
+++ b/qinling/services/periodics.py
@@ -64,7 +64,7 @@ def handle_function_service_expiration(ctx, engine):
         )
 
         # Delete resources related to the function
-        engine.delete_function(func_db.id)
+        engine.delete_function(ctx, func_db.id)
         # Delete etcd keys
         etcd_util.delete_function(func_db.id)
 
diff --git a/qinling/tests/unit/services/__init__.py b/qinling/tests/unit/services/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/qinling/tests/unit/services/test_periodics.py b/qinling/tests/unit/services/test_periodics.py
new file mode 100644
index 00000000..7b896c54
--- /dev/null
+++ b/qinling/tests/unit/services/test_periodics.py
@@ -0,0 +1,51 @@
+# Copyright 2017 Catalyst IT Limited
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+import time
+
+import mock
+from oslo_config import cfg
+
+from qinling.db import api as db_api
+from qinling.engine import default_engine
+from qinling.services import periodics
+from qinling.tests.unit import base
+
+CONF = cfg.CONF
+
+
+class TestPeriodics(base.DbTestCase):
+    TEST_CASE_NAME = 'TestPeriodics'
+
+    @mock.patch('qinling.utils.etcd_util.delete_function')
+    @mock.patch('qinling.utils.etcd_util.get_service_url')
+    def test_function_service_expiration(self, mock_etcd_url,
+                                         mock_etcd_delete):
+        db_func = self.create_function(
+            runtime_id=None, prefix=self.TEST_CASE_NAME
+        )
+        function_id = db_func.id
+        # Update function to simulate function execution
+        db_api.update_function(function_id, {'count': 1})
+        time.sleep(1.5)
+
+        mock_k8s = mock.Mock()
+        mock_etcd_url.return_value = 'http://localhost:37718'
+        self.override_config('function_service_expiration', 1, 'engine')
+        engine = default_engine.DefaultEngine(mock_k8s)
+        periodics.handle_function_service_expiration(self.ctx, engine)
+
+        self.assertEqual(1, mock_k8s.delete_function.call_count)
+        args, kwargs = mock_k8s.delete_function.call_args
+        self.assertIn(function_id, args)
+        mock_etcd_delete.assert_called_once_with(function_id)