diff --git a/oslo_utils/netutils.py b/oslo_utils/netutils.py
index 3d8a2a2c..19f54e73 100644
--- a/oslo_utils/netutils.py
+++ b/oslo_utils/netutils.py
@@ -112,7 +112,7 @@ def is_valid_ipv4(address, strict=None):
             return True
         else:
             if netaddr.valid_ipv4(address):
-                LOG.warn(
+                LOG.warning(
                     'Converting in non strict mode is deprecated. '
                     'You should pass strict=False if you want to '
                     'preserve legacy behavior')
diff --git a/oslo_utils/tests/test_netutils.py b/oslo_utils/tests/test_netutils.py
index 93fedf39..087522cb 100644
--- a/oslo_utils/tests/test_netutils.py
+++ b/oslo_utils/tests/test_netutils.py
@@ -166,16 +166,16 @@ class NetworkUtilsTest(test_base.BaseTestCase):
         self.assertFalse(netutils.is_valid_ipv4(''))
 
         self.assertTrue(netutils.is_valid_ipv4('10'))
-        mock_log.warn.assert_called_with(expected_log)
+        mock_log.warning.assert_called_with(expected_log)
         mock_log.reset_mock()
         self.assertTrue(netutils.is_valid_ipv4('10.10'))
-        mock_log.warn.assert_called_with(expected_log)
+        mock_log.warning.assert_called_with(expected_log)
         mock_log.reset_mock()
         self.assertTrue(netutils.is_valid_ipv4('10.10.10'))
-        mock_log.warn.assert_called_with(expected_log)
+        mock_log.warning.assert_called_with(expected_log)
         mock_log.reset_mock()
         self.assertTrue(netutils.is_valid_ipv4('10.10.10.10'))
-        mock_log.warn.assert_not_called()
+        mock_log.warning.assert_not_called()
         mock_log.reset_mock()
         self.assertFalse(
             netutils.is_valid_ipv4('10', strict=True)
@@ -186,7 +186,7 @@ class NetworkUtilsTest(test_base.BaseTestCase):
         self.assertFalse(
             netutils.is_valid_ipv4('10.10.10', strict=True)
         )
-        mock_log.warn.assert_not_called()
+        mock_log.warning.assert_not_called()
         mock_log.reset_mock()
         self.assertTrue(
             netutils.is_valid_ipv4('10', strict=False)
@@ -197,7 +197,7 @@ class NetworkUtilsTest(test_base.BaseTestCase):
         self.assertTrue(
             netutils.is_valid_ipv4('10.10.10', strict=False)
         )
-        mock_log.warn.assert_not_called()
+        mock_log.warning.assert_not_called()
         mock_log.reset_mock()
 
     def test_is_valid_ipv6(self):