diff --git a/mistralclient/commands/v2/base.py b/mistralclient/commands/v2/base.py
index 2200af4c..b97223fd 100644
--- a/mistralclient/commands/v2/base.py
+++ b/mistralclient/commands/v2/base.py
@@ -15,10 +15,11 @@
 #
 
 import abc
-import datetime as dt
+import datetime
 import textwrap
 
 from osc_lib.command import command
+from oslo_utils import timeutils
 
 
 DEFAULT_LIMIT = 100
@@ -204,24 +205,24 @@ def get_duration_str(start_dt_str, end_dt_str):
     if not start_dt_str:
         return ''
 
-    start_dt = dt.datetime.strptime(start_dt_str, '%Y-%m-%d %H:%M:%S')
+    start_dt = datetime.datetime.strptime(start_dt_str, '%Y-%m-%d %H:%M:%S')
 
     if end_dt_str:
-        end_dt = dt.datetime.strptime(end_dt_str, '%Y-%m-%d %H:%M:%S')
+        end_dt = datetime.datetime.strptime(end_dt_str, '%Y-%m-%d %H:%M:%S')
 
         return str(end_dt - start_dt)
 
-    delta_from_now = dt.datetime.utcnow() - start_dt
+    delta_from_now = timeutils.utcnow() - start_dt
 
     # If delta is too small then we won't show any value. It means that
     # the corresponding process (e.g. an execution) just started.
-    if delta_from_now < dt.timedelta(seconds=2):
+    if delta_from_now < datetime.timedelta(seconds=2):
         return '...'
 
     # Drop microseconds to decrease verbosity.
     delta = (
         delta_from_now
-        - dt.timedelta(microseconds=delta_from_now.microseconds)
+        - datetime.timedelta(microseconds=delta_from_now.microseconds)
     )
 
     return "{}...".format(delta)
diff --git a/mistralclient/tests/unit/v2/test_cli_environments.py b/mistralclient/tests/unit/v2/test_cli_environments.py
index 82a258d1..6f335ef7 100644
--- a/mistralclient/tests/unit/v2/test_cli_environments.py
+++ b/mistralclient/tests/unit/v2/test_cli_environments.py
@@ -13,13 +13,12 @@
 #    limitations under the License.
 
 import copy
-import datetime
 import os
 import tempfile
 from unittest import mock
 
 from oslo_serialization import jsonutils
-
+from oslo_utils import timeutils
 import yaml
 
 from mistralclient.api.v2 import environments
@@ -37,8 +36,8 @@ ENVIRONMENT_DICT = {
         'timeout': 600,
         'verbose': True
     },
-    'created_at': str(datetime.datetime.utcnow()),
-    'updated_at': str(datetime.datetime.utcnow())
+    'created_at': str(timeutils.utcnow()),
+    'updated_at': str(timeutils.utcnow())
 }
 
 ENVIRONMENT = environments.Environment(mock, ENVIRONMENT_DICT)