diff --git a/ironic/api/controllers/v1/types.py b/ironic/api/controllers/v1/types.py
index d64ba47bb3..87f5749540 100644
--- a/ironic/api/controllers/v1/types.py
+++ b/ironic/api/controllers/v1/types.py
@@ -192,7 +192,7 @@ jsontype = JsonType()
 class JsonPatchType(wtypes.Base):
     """A complex type that represents a single json-patch operation."""
 
-    path = wtypes.wsattr(wtypes.StringType(pattern='^(/[\w-]+)+$'),
+    path = wtypes.wsattr(wtypes.StringType(pattern='^(/[\\w-]+)+$'),
                          mandatory=True)
     op = wtypes.wsattr(wtypes.Enum(str, 'add', 'replace', 'remove'),
                        mandatory=True)
diff --git a/ironic/api/middleware/auth_token.py b/ironic/api/middleware/auth_token.py
index ff81b0dfe0..1f7500c0a9 100644
--- a/ironic/api/middleware/auth_token.py
+++ b/ironic/api/middleware/auth_token.py
@@ -33,7 +33,7 @@ class AuthTokenMiddleware(auth_token.AuthProtocol):
         self._ironic_app = app
         # TODO(mrda): Remove .xml and ensure that doesn't result in a
         # 401 Authentication Required instead of 404 Not Found
-        route_pattern_tpl = '%s(\.json|\.xml)?$'
+        route_pattern_tpl = '%s(\\.json|\\.xml)?$'
 
         try:
             self.public_api_routes = [re.compile(route_pattern_tpl % route_tpl)
diff --git a/ironic/common/utils.py b/ironic/common/utils.py
index 9fcc5f48e4..acde43b6e4 100644
--- a/ironic/common/utils.py
+++ b/ironic/common/utils.py
@@ -153,7 +153,7 @@ def is_valid_no_proxy(no_proxy):
     """
     if not isinstance(no_proxy, six.string_types):
         return False
-    hostname_re = re.compile('(?!-)[A-Z\d-]{1,63}(?<!-)$', re.IGNORECASE)
+    hostname_re = re.compile('(?!-)[A-Z\\d-]{1,63}(?<!-)$', re.IGNORECASE)
     for hostname in no_proxy.split(','):
         hostname = hostname.strip().split(':')[0]
         if not hostname:
diff --git a/ironic/conductor/task_manager.py b/ironic/conductor/task_manager.py
index 19f7633d4f..9fbff3b7f7 100644
--- a/ironic/conductor/task_manager.py
+++ b/ironic/conductor/task_manager.py
@@ -426,8 +426,8 @@ class TaskManager(object):
 
         :param event: the name of the event to process
         :param callback: optional callback to invoke upon event transition
-        :param call_args: optional \*args to pass to the callback method
-        :param call_kwargs: optional \**kwargs to pass to the callback method
+        :param call_args: optional *args to pass to the callback method
+        :param call_kwargs: optional **kwargs to pass to the callback method
         :param err_handler: optional error handler to invoke if the
                 callback fails, eg. because there are no workers available
                 (err_handler should accept arguments node, prev_prov_state, and
diff --git a/ironic/drivers/modules/ilo/firmware_processor.py b/ironic/drivers/modules/ilo/firmware_processor.py
index 039bea690c..45e3e86a7a 100644
--- a/ironic/drivers/modules/ilo/firmware_processor.py
+++ b/ironic/drivers/modules/ilo/firmware_processor.py
@@ -106,7 +106,7 @@ def _validate_sum_components(components):
     """
     not_supported = []
     for component in components:
-        if not re.search('\.(scexe|exe|rpm)$', component):
+        if not re.search('\\.(scexe|exe|rpm)$', component):
             not_supported.append(component)
 
     if not_supported:
diff --git a/tox.ini b/tox.ini
index 65e6af96e7..27b06ec3e3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -106,9 +106,9 @@ commands = {posargs}
 
 [flake8]
 # [W503] Line break before binary operator.
-# NOTE(TheJulia): Adding W605,W606,E501,F405 to the ignore list
+# NOTE(TheJulia): Adding W606,E501,F405 to the ignore list
 # until we are able to clean them up in the code base.
-ignore = E129,W503,W605,W606,E501,F405
+ignore = E129,W503,W606,E501,F405
 filename = *.py,app.wsgi
 exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 import-order-style = pep8