diff --git a/doc/source/reference/storage/external-ceph-guide.rst b/doc/source/reference/storage/external-ceph-guide.rst
index cf3bd0e5a8..f37678eb29 100644
--- a/doc/source/reference/storage/external-ceph-guide.rst
+++ b/doc/source/reference/storage/external-ceph-guide.rst
@@ -211,8 +211,7 @@ Cinder for Ceph includes following steps:
 
   * ``/etc/kolla/config/cinder/cinder-volume/ceph.client.cinder.keyring``
   * ``/etc/kolla/config/cinder/cinder-backup/ceph.client.cinder.keyring``
-  * ``/etc/kolla/config/cinder/cinder-backup/
-    ceph.client.cinder-backup.keyring``
+  * ``/etc/kolla/config/cinder/cinder-backup/ceph.client.cinder-backup.keyring``
 
 .. note::
 
@@ -281,8 +280,7 @@ the use with availability zones:
   * ``/etc/kolla/config/cinder/cinder-volume/ceph1.client.cinder.keyring``
   * ``/etc/kolla/config/cinder/cinder-backup/ceph1.client.cinder.keyring``
   * ``/etc/kolla/config/cinder/cinder-backup/ceph2.client.cinder.keyring``
-  * ``/etc/kolla/config/cinder/cinder-backup/
-    ceph2.client.cinder-backup.keyring``
+  * ``/etc/kolla/config/cinder/cinder-backup/ceph2.client.cinder-backup.keyring``
 
 .. note::
 
@@ -296,8 +294,8 @@ Nova must also be configured to allow access to Cinder volumes:
   * ``/etc/kolla/config/nova/ceph.conf``
   * ``/etc/kolla/config/nova/ceph.client.cinder.keyring``
 
-To configure ``different Ceph backend`` for nova-compute host, which
-is useful for the use with availability zones:
+To configure different Ceph backends for nova-compute hosts, which is useful
+for use with availability zones:
 
 * Edit inventory file in the way described below:
 
@@ -364,8 +362,8 @@ Configuring Nova for Ceph includes following steps:
      keys for Cinder and Nova, you will need to override
      ``ceph_nova_user`` to match.
 
-To configure ``different Ceph backend`` for nova-compute host, which
-is useful for the use with availability zones:
+To configure different Ceph backends for nova-compute hosts, which is useful
+for use with availability zones:
 
 Edit inventory file in the way described below:
 
diff --git a/tox.ini b/tox.ini
index 10a2ce5177..6b36c1eec3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -126,6 +126,11 @@ show-source = True
 ignore = W504
 exclude = .eggs,.git,.tox,doc
 
+[doc8]
+# NOTE(priteau): We break max line length in this file to avoid inserting
+# erroneous space characters inside file paths
+ignore-path = doc/source/reference/storage/external-ceph-guide.rst
+
 [testenv:doc8]
 deps = {[testenv:linters]deps}
 commands =