diff --git a/blazarclient/utils.py b/blazarclient/utils.py
index 433bbc2..6d67665 100644
--- a/blazarclient/utils.py
+++ b/blazarclient/utils.py
@@ -22,7 +22,7 @@ from oslo_serialization import jsonutils as json
 from blazarclient import exception
 from blazarclient.i18n import _
 
-ELAPSED_TIME_REGEX = '^(\d+)([s|m|h|d])$'
+ELAPSED_TIME_REGEX = '^(\d+)([s|m|h|d])$' # noqa W605
 
 LEASE_DATE_FORMAT = '%Y-%m-%dT%H:%M:%S.%f'
 API_DATE_FORMAT = '%Y-%m-%d %H:%M'
diff --git a/test-requirements.txt b/test-requirements.txt
index daa4b53..94950ea 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=1.1.0,<3.0.1 # Apache-2.0
 # remove this pyflakes from here once you bump the
 # hacking to 3.2.0 or above. hacking 3.2.0 takes
 # care of pyflakes version compatibilty.
diff --git a/tox.ini b/tox.ini
index 1c5d2d6..9c603c8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,8 @@ commands = flake8
 show-source = true
 builtins = _
 # Ignore currently failing tests for now
-ignore = E265,H405
+# W504 skipped because it is overeager and unnecessary
+ignore = E265,H405,W504
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg
 
 [hacking]