diff --git a/keystoneauth1/_utils.py b/keystoneauth1/_utils.py
index 7d0c48ff..cbc1b0e2 100644
--- a/keystoneauth1/_utils.py
+++ b/keystoneauth1/_utils.py
@@ -44,7 +44,7 @@ def parse_isotime(timestr):
 
 
 def from_utcnow(**timedelta_kwargs):
-    """Calculate the time in the future from utcnow.
+    r"""Calculate the time in the future from utcnow.
 
     :param \*\*timedelta_kwargs:
         Passed directly to :class:`datetime.timedelta` to add to the current
@@ -60,7 +60,7 @@ def from_utcnow(**timedelta_kwargs):
 
 
 def before_utcnow(**timedelta_kwargs):
-    """Calculate the time in the past from utcnow.
+    r"""Calculate the time in the past from utcnow.
 
     :param \*\*timedelta_kwargs:
         Passed directly to :class:`datetime.timedelta` to subtract from the
diff --git a/keystoneauth1/extras/_saml2/v3/saml2.py b/keystoneauth1/extras/_saml2/v3/saml2.py
index 8902a299..1b1736dc 100644
--- a/keystoneauth1/extras/_saml2/v3/saml2.py
+++ b/keystoneauth1/extras/_saml2/v3/saml2.py
@@ -18,7 +18,7 @@ from keystoneauth1.extras._saml2.v3 import base
 
 
 class Password(base.BaseSAMLPlugin):
-    """Implement authentication plugin for SAML2 protocol.
+    r"""Implement authentication plugin for SAML2 protocol.
 
     ECP stands for `Enhanced Client or Proxy` and is a SAML2 extension
     for federated authentication where a transportation layer consists of
diff --git a/keystoneauth1/identity/v3/oidc.py b/keystoneauth1/identity/v3/oidc.py
index 4f497292..b8b0ecf2 100644
--- a/keystoneauth1/identity/v3/oidc.py
+++ b/keystoneauth1/identity/v3/oidc.py
@@ -101,7 +101,7 @@ class _OidcBase(federation.FederationBaseAuth):
         return op_response
 
     def _get_keystone_token(self, session, headers, federated_token_url):
-        """Exchange an acess token for a keystone token.
+        r"""Exchange an acess token for a keystone token.
 
         By Sending the access token in an `Authorization: Bearer` header, to
         an OpenID Connect protected endpoint (Federated Token URL). The
diff --git a/keystoneauth1/tests/unit/utils.py b/keystoneauth1/tests/unit/utils.py
index bbd94ce4..94895c91 100644
--- a/keystoneauth1/tests/unit/utils.py
+++ b/keystoneauth1/tests/unit/utils.py
@@ -72,7 +72,7 @@ class TestCase(testtools.TestCase):
             self.assertEqual(body, last_request_body)
 
     def assertQueryStringIs(self, qs=''):
-        """Verify the QueryString matches what is expected.
+        r"""Verify the QueryString matches what is expected.
 
         The qs parameter should be of the format \'foo=bar&abc=xyz\'
         """
diff --git a/tox.ini b/tox.ini
index 18ac6879..d8d7c80b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -42,8 +42,7 @@ commands = oslo_debug_helper -t keystoneauth1/tests {posargs}
 # D205: Blank line required between one-line summary and description.
 # D208: Docstring is over-indented
 # D211: No blank lines allowed before class docstring
-# D301: Use r”“” if any backslashes in a docstring
-ignore = H405,D100,D101,D102,D103,D104,D105,D200,D203,D204,D205,D208,D211,D301
+ignore = H405,D100,D101,D102,D103,D104,D105,D200,D203,D204,D205,D208,D211
 show-source = True
 exclude = .venv,.tox,dist,doc,*egg,build,*openstack/common*