diff --git a/tempest/common/rest_client.py b/tempest/common/rest_client.py
index 1df8896..576fc26 100644
--- a/tempest/common/rest_client.py
+++ b/tempest/common/rest_client.py
@@ -76,18 +76,6 @@
 
     TYPE = "json"
 
-    # This is used by _parse_resp method
-    # Redefine it for purposes of your xml service client
-    # List should contain top-xml_tag-names of data, which is like list/array
-    # For example, in keystone it is users, roles, tenants and services
-    # All of it has children with same tag-names
-    list_tags = []
-
-    # This is used by _parse_resp method too
-    # Used for selection of dict-like xmls,
-    # like metadata for Vms in nova, and volumes in cinder
-    dict_tags = ["metadata", ]
-
     LOG = logging.getLogger(__name__)
 
     def __init__(self, auth_provider):
@@ -495,9 +483,8 @@
         # (and occasionally swift) are using.
         TXT_ENC = ['text/plain', 'text/html', 'text/html; charset=utf-8',
                    'text/plain; charset=utf-8']
-        XML_ENC = ['application/xml', 'application/xml; charset=utf-8']
 
-        if ctype.lower() in JSON_ENC or ctype.lower() in XML_ENC:
+        if ctype.lower() in JSON_ENC:
             parse_resp = True
         elif ctype.lower() in TXT_ENC:
             parse_resp = False
@@ -569,13 +556,10 @@
         if (not isinstance(resp_body, collections.Mapping) or
                 'retry-after' not in resp):
             return True
-        if self._get_type() is "json":
-            over_limit = resp_body.get('overLimit', None)
-            if not over_limit:
-                return True
-            return 'exceed' in over_limit.get('message', 'blabla')
-        elif self._get_type() is "xml":
-            return 'exceed' in resp_body.get('message', 'blabla')
+        over_limit = resp_body.get('overLimit', None)
+        if not over_limit:
+            return True
+        return 'exceed' in over_limit.get('message', 'blabla')
 
     def wait_for_resource_deletion(self, id):
         """Waits for a resource to be deleted."""
diff --git a/tempest/services/identity/json/identity_client.py b/tempest/services/identity/json/identity_client.py
index e76c1bd..281464c 100644
--- a/tempest/services/identity/json/identity_client.py
+++ b/tempest/services/identity/json/identity_client.py
@@ -26,10 +26,6 @@
         self.service = CONF.identity.catalog_type
         self.endpoint_url = 'adminURL'
 
-        # Needed for xml service client
-        self.list_tags = ["roles", "tenants", "users", "services",
-                          "extensions"]
-
     def has_admin_extensions(self):
         """
         Returns True if the KSADM Admin Extensions are supported
@@ -335,9 +331,6 @@
                 body=None):
         """A simple HTTP request interface."""
         if headers is None:
-            # Always accept 'json', for TokenClientXML too.
-            # Because XML response is not easily
-            # converted to the corresponding JSON one
             headers = self.get_headers(accept_type="json")
         elif extra_headers:
             try: