diff --git a/nova/api/openstack/placement/handlers/resource_provider.py b/nova/api/openstack/placement/handlers/resource_provider.py
index 936943882db8..d5e39c0f8a42 100644
--- a/nova/api/openstack/placement/handlers/resource_provider.py
+++ b/nova/api/openstack/placement/handlers/resource_provider.py
@@ -22,6 +22,7 @@ import webob
 
 from nova.api.openstack.placement import microversion
 from nova.api.openstack.placement import util
+from nova.api.openstack.placement import wsgi_wrapper
 from nova import exception
 from nova.i18n import _
 from nova import objects
@@ -117,8 +118,7 @@ def _normalize_resources_qs_param(qs):
                     'query string parameter in form: '
                     '?resources=VCPU:2,MEMORY_MB:1024. Got: %s.')
             msg = msg % rt
-            raise webob.exc.HTTPBadRequest(msg,
-                    json_formatter=util.json_error_formatter)
+            raise webob.exc.HTTPBadRequest(msg)
         try:
             amount = int(amount)
         except ValueError:
@@ -128,8 +128,7 @@ def _normalize_resources_qs_param(qs):
                 'resource_name': rc_name,
                 'amount': amount,
             }
-            raise webob.exc.HTTPBadRequest(msg,
-                    json_formatter=util.json_error_formatter)
+            raise webob.exc.HTTPBadRequest(msg)
         if amount < 1:
             msg = _('Requested resource %(resource_name)s requires '
                     'amount >= 1. Got: %(amount)d.')
@@ -137,8 +136,7 @@ def _normalize_resources_qs_param(qs):
                 'resource_name': rc_name,
                 'amount': amount,
             }
-            raise webob.exc.HTTPBadRequest(msg,
-                    json_formatter=util.json_error_formatter)
+            raise webob.exc.HTTPBadRequest(msg)
         result[rc_name] = amount
     return result
 
@@ -169,7 +167,7 @@ def _serialize_providers(environ, resource_providers):
     return {"resource_providers": output}
 
 
-@webob.dec.wsgify
+@wsgi_wrapper.PlacementWsgify
 @util.require_content('application/json')
 def create_resource_provider(req):
     """POST to create a resource provider.
@@ -188,13 +186,11 @@ def create_resource_provider(req):
     except db_exc.DBDuplicateEntry as exc:
         raise webob.exc.HTTPConflict(
             _('Conflicting resource provider already exists: %(error)s') %
-            {'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'error': exc})
     except exception.ObjectActionError as exc:
         raise webob.exc.HTTPBadRequest(
             _('Unable to create resource provider %(rp_uuid)s: %(error)s') %
-            {'rp_uuid': uuid, 'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'rp_uuid': uuid, 'error': exc})
 
     req.response.location = util.resource_provider_url(
         req.environ, resource_provider)
@@ -203,7 +199,7 @@ def create_resource_provider(req):
     return req.response
 
 
-@webob.dec.wsgify
+@wsgi_wrapper.PlacementWsgify
 def delete_resource_provider(req):
     """DELETE to destroy a single resource provider.
 
@@ -219,8 +215,7 @@ def delete_resource_provider(req):
     except exception.ResourceProviderInUse as exc:
         raise webob.exc.HTTPConflict(
             _('Unable to delete resource provider %(rp_uuid)s: %(error)s') %
-            {'rp_uuid': uuid, 'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'rp_uuid': uuid, 'error': exc})
     except exception.NotFound as exc:
         raise webob.exc.HTTPNotFound(
             _("No resource provider with uuid %s found for delete") % uuid)
@@ -229,7 +224,7 @@ def delete_resource_provider(req):
     return req.response
 
 
-@webob.dec.wsgify
+@wsgi_wrapper.PlacementWsgify
 @util.check_accept('application/json')
 def get_resource_provider(req):
     """Get a single resource provider.
@@ -250,7 +245,7 @@ def get_resource_provider(req):
     return req.response
 
 
-@webob.dec.wsgify
+@wsgi_wrapper.PlacementWsgify
 @util.check_accept('application/json')
 def list_resource_providers(req):
     """GET a list of resource providers.
@@ -272,8 +267,7 @@ def list_resource_providers(req):
     except jsonschema.ValidationError as exc:
         raise webob.exc.HTTPBadRequest(
             _('Invalid query string parameters: %(exc)s') %
-            {'exc': exc},
-            json_formatter=util.json_error_formatter)
+            {'exc': exc})
 
     filters = {}
     for attr in ['uuid', 'name', 'member_of']:
@@ -294,8 +288,7 @@ def list_resource_providers(req):
                     if not uuidutils.is_uuid_like(aggr_uuid):
                         raise webob.exc.HTTPBadRequest(
                             _('Invalid uuid value: %(uuid)s') %
-                            {'uuid': aggr_uuid},
-                            json_formatter=util.json_error_formatter)
+                            {'uuid': aggr_uuid})
             filters[attr] = value
     if 'resources' in req.GET:
         resources = _normalize_resources_qs_param(req.GET['resources'])
@@ -306,8 +299,7 @@ def list_resource_providers(req):
     except exception.ResourceClassNotFound as exc:
         raise webob.exc.HTTPBadRequest(
             _('Invalid resource class in resources parameter: %(error)s') %
-            {'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'error': exc})
 
     response = req.response
     response.body = encodeutils.to_utf8(
@@ -316,7 +308,7 @@ def list_resource_providers(req):
     return response
 
 
-@webob.dec.wsgify
+@wsgi_wrapper.PlacementWsgify
 @util.require_content('application/json')
 def update_resource_provider(req):
     """PUT to update a single resource provider.
@@ -340,13 +332,11 @@ def update_resource_provider(req):
     except db_exc.DBDuplicateEntry as exc:
         raise webob.exc.HTTPConflict(
             _('Conflicting resource provider already exists: %(error)s') %
-            {'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'error': exc})
     except exception.ObjectActionError as exc:
         raise webob.exc.HTTPBadRequest(
             _('Unable to save resource provider %(rp_uuid)s: %(error)s') %
-            {'rp_uuid': uuid, 'error': exc},
-            json_formatter=util.json_error_formatter)
+            {'rp_uuid': uuid, 'error': exc})
 
     req.response.body = encodeutils.to_utf8(jsonutils.dumps(
         _serialize_provider(req.environ, resource_provider)))
diff --git a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-resources-query.yaml b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-resources-query.yaml
index 3dcdc499d25f..e69d63efa863 100644
--- a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-resources-query.yaml
+++ b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider-resources-query.yaml
@@ -6,6 +6,7 @@ defaults:
     request_headers:
         x-auth-token: admin
         content-type: application/json
+        accept: application/json
         OpenStack-API-Version: placement latest
 
 tests:
@@ -44,6 +45,8 @@ tests:
   status: 400
   response_strings:
       - 'Invalid query string parameters'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing a badly-formatted resources filter
   GET: /resource_providers?resources=VCPU
@@ -51,6 +54,8 @@ tests:
   response_strings:
       - 'Badly formed resources parameter. Expected resources query string parameter in form:'
       - 'Got: VCPU.'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing a resources filter with non-integer amount
   GET: /resource_providers?resources=VCPU:fred
@@ -58,6 +63,8 @@ tests:
   response_strings:
       - 'Requested resource VCPU expected positive integer amount.'
       - 'Got: fred.'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing a resources filter with negative amount
   GET: /resource_providers?resources=VCPU:-2
@@ -65,12 +72,16 @@ tests:
   response_strings:
       - 'Requested resource VCPU requires amount >= 1.'
       - 'Got: -2.'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing a resource class not existing
   GET: /resource_providers?resources=MYMISSINGCLASS:1
   status: 400
   response_strings:
       - 'Invalid resource class in resources parameter'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing a bad trailing comma
   GET: /resource_providers?resources=DISK_GB:500,
@@ -80,6 +91,8 @@ tests:
       # NOTE(mriedem): The value is empty because splitting on the trailing
       # comma results in an empty string.
       - 'Got: .'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing disk resources
   GET: /resource_providers?resources=DISK_GB:500
diff --git a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider.yaml b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider.yaml
index 6ce3ebb99e09..ee37a80d400c 100644
--- a/nova/tests/functional/api/openstack/placement/gabbits/resource-provider.yaml
+++ b/nova/tests/functional/api/openstack/placement/gabbits/resource-provider.yaml
@@ -5,6 +5,7 @@ fixtures:
 defaults:
     request_headers:
         x-auth-token: admin
+        accept: application/json
 
 tests:
 
@@ -54,6 +55,8 @@ tests:
   status: 409
   response_strings:
       - Conflicting resource provider already exists
+  response_json_paths:
+      $.errors[0].title: Conflict
 
 - name: try to create same name again
   POST: /resource_providers
@@ -65,6 +68,8 @@ tests:
   status: 409
   response_strings:
       - Conflicting resource provider already exists
+  response_json_paths:
+      $.errors[0].title: Conflict
 
 - name: confirm the correct post
   GET: /resource_providers/$ENVIRON['RP_UUID']
@@ -91,6 +96,8 @@ tests:
   status: 404
   response_strings:
       - No resource provider with uuid d67370b5-4dc0-470d-a4fa-85e8e89abc6c found
+  response_json_paths:
+      $.errors[0].title: Not Found
 
 - name: list one resource providers
   GET: /resource_providers
@@ -130,12 +137,16 @@ tests:
   status: 400
   response_strings:
       - 'Invalid query string parameters'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list resource providers providing an invalid filter
   GET: /resource_providers?spam=eggs
   status: 400
   response_strings:
       - 'Invalid query string parameters'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: list one resource provider filtering by uuid
   GET: /resource_providers?uuid=$ENVIRON['RP_UUID']
@@ -179,6 +190,8 @@ tests:
   status: 400
   response_strings:
       - 'JSON does not validate'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: create a new provider
   POST: /resource_providers
@@ -195,6 +208,8 @@ tests:
   data:
       name: new name
   status: 409
+  response_json_paths:
+      $.errors[0].title: Conflict
 
 - name: fail to put that provider with uuid
   PUT: $LAST_URL
@@ -206,6 +221,8 @@ tests:
   status: 400
   response_strings:
       - Additional properties are not allowed
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: delete resource provider
   DELETE: $LAST_URL
@@ -214,16 +231,22 @@ tests:
 - name: 404 on deleted provider
   DELETE: $LAST_URL
   status: 404
+  response_json_paths:
+      $.errors[0].title: Not Found
 
 - name: fail to get a provider
   GET: /resource_providers/random_sauce
   status: 404
+  response_json_paths:
+      $.errors[0].title: Not Found
 
 - name: delete non-existing resource provider
   DELETE: /resource_providers/d67370b5-4dc0-470d-a4fa-85e8e89abc6c
   status: 404
   response_strings:
       - No resource provider with uuid d67370b5-4dc0-470d-a4fa-85e8e89abc6c found for delete
+  response_json_paths:
+      $.errors[0].title: Not Found
 
 - name: post resource provider no uuid
   POST: /resource_providers
@@ -243,6 +266,8 @@ tests:
   status: 400
   response_strings:
       - 'Malformed JSON:'
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: post bad uuid in resource provider
   POST: /resource_providers
@@ -254,6 +279,8 @@ tests:
   status: 400
   response_strings:
       - "Failed validating 'format'"
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: try to create resource provider with name exceed max characters
   POST: /resource_providers
@@ -264,6 +291,8 @@ tests:
   status: 400
   response_strings:
       - "Failed validating 'maxLength'"
+  response_json_paths:
+      $.errors[0].title: Bad Request
 
 - name: try to update resource provider with name exceed max characters
   PUT: /resource_providers/$ENVIRON['RP_UUID']
@@ -274,3 +303,5 @@ tests:
   status: 400
   response_strings:
       - "Failed validating 'maxLength'"
+  response_json_paths:
+      $.errors[0].title: Bad Request