diff --git a/releasenotes/notes/deprecate-get_ipv6_addr_by_EUI64-4673f07677289cf6.yaml b/releasenotes/notes/deprecate-get_ipv6_addr_by_EUI64-4673f07677289cf6.yaml
new file mode 100644
index 0000000..0884cfa
--- /dev/null
+++ b/releasenotes/notes/deprecate-get_ipv6_addr_by_EUI64-4673f07677289cf6.yaml
@@ -0,0 +1,4 @@
+---
+deprecations:
+  - Oslo.utils provides same method get_ipv6_addr_by_EUI64,
+    so deprecate it in Newton and remove it in Ocata.
diff --git a/tempest/lib/common/utils/data_utils.py b/tempest/lib/common/utils/data_utils.py
index 8910927..4095c77 100644
--- a/tempest/lib/common/utils/data_utils.py
+++ b/tempest/lib/common/utils/data_utils.py
@@ -19,6 +19,7 @@
 import string
 import uuid
 
+from debtcollector import removals
 from oslo_utils import netutils
 import six.moves
 
@@ -175,6 +176,10 @@
                     for i in range(size)])
 
 
+@removals.remove(
+    message="use get_ipv6_addr_by_EUI64 from oslo_utils.netutils",
+    version="Newton",
+    removal_version="Ocata")
 def get_ipv6_addr_by_EUI64(cidr, mac):
     """Generate a IPv6 addr by EUI-64 with CIDR and MAC
 
diff --git a/tox.ini b/tox.ini
index 05fa326..1c5c177 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,7 @@
 setenv =
     VIRTUAL_ENV={envdir}
     OS_TEST_PATH=./tempest/tests
+    PYTHONWARNINGS=default::DeprecationWarning
 passenv = OS_STDOUT_CAPTURE OS_STDERR_CAPTURE OS_TEST_TIMEOUT OS_TEST_LOCK_PATH OS_TEST_PATH TEMPEST_CONFIG TEMPEST_CONFIG_DIR http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 usedevelop = True
 install_command = pip install -U {opts} {packages}