diff --git a/watcher/common/context.py b/watcher/common/context.py
index 3da7b220b..99fcb797b 100644
--- a/watcher/common/context.py
+++ b/watcher/common/context.py
@@ -15,8 +15,6 @@ from oslo_log import log as logging
 from oslo_utils import timeutils
 import six
 
-from watcher.common import utils
-
 LOG = logging.getLogger(__name__)
 
 
@@ -102,7 +100,7 @@ class RequestContext(context.RequestContext):
             'domain_name': getattr(self, 'domain_name', None),
             'auth_token_info': getattr(self, 'auth_token_info', None),
             'is_admin': getattr(self, 'is_admin', None),
-            'timestamp': utils.strtime(self.timestamp) if hasattr(
+            'timestamp': self.timestamp.isoformat() if hasattr(
                 self, 'timestamp') else None,
             'request_id': getattr(self, 'request_id', None),
         })
diff --git a/watcher/common/utils.py b/watcher/common/utils.py
index 86e5ecb00..16e97384f 100644
--- a/watcher/common/utils.py
+++ b/watcher/common/utils.py
@@ -26,7 +26,6 @@ from croniter import croniter
 from jsonschema import validators
 from oslo_log import log as logging
 from oslo_utils import strutils
-from oslo_utils import timeutils
 from oslo_utils import uuidutils
 import six
 
@@ -65,7 +64,6 @@ class Struct(dict):
 generate_uuid = uuidutils.generate_uuid
 is_uuid_like = uuidutils.is_uuid_like
 is_int_like = strutils.is_int_like
-strtime = timeutils.strtime
 
 
 def is_cron_like(value):
diff --git a/watcher/tests/api/v1/test_audits.py b/watcher/tests/api/v1/test_audits.py
index b26f62cd1..c81eaa4ed 100644
--- a/watcher/tests/api/v1/test_audits.py
+++ b/watcher/tests/api/v1/test_audits.py
@@ -829,8 +829,10 @@ class TestDelete(api_base.FunctionalTest):
         self.context.show_deleted = True
         audit = objects.Audit.get_by_uuid(self.context, self.audit.uuid)
 
-        return_deleted_at = timeutils.strtime(audit['deleted_at'])
-        self.assertEqual(timeutils.strtime(test_time), return_deleted_at)
+        return_deleted_at = \
+            audit['deleted_at'].strftime('%Y-%m-%dT%H:%M:%S.%f')
+        self.assertEqual(test_time.strftime('%Y-%m-%dT%H:%M:%S.%f'),
+                         return_deleted_at)
         self.assertEqual(objects.audit.State.DELETED, audit['state'])
 
     def test_delete_audit_not_found(self):