diff --git a/tempest/common/rest_client.py b/tempest/common/rest_client.py
index 212d41d..6d08d2d 100644
--- a/tempest/common/rest_client.py
+++ b/tempest/common/rest_client.py
@@ -63,11 +63,6 @@
         # The version of the API this client implements
         self.api_version = None
         self._skip_path = False
-        # NOTE(vponomaryov): self.headers is deprecated now.
-        # should be removed after excluding it from all use places.
-        # Insted of this should be used 'get_headers' method
-        self.headers = {'Content-Type': 'application/%s' % self.TYPE,
-                        'Accept': 'application/%s' % self.TYPE}
         self.build_interval = CONF.compute.build_interval
         self.build_timeout = CONF.compute.build_timeout
         self.general_header_lc = set(('cache-control', 'connection',
@@ -86,8 +81,6 @@
         return self.TYPE
 
     def get_headers(self, accept_type=None, send_type=None):
-        # This method should be used instead of
-        # deprecated 'self.headers'
         if accept_type is None:
             accept_type = self._get_type()
         if send_type is None:
diff --git a/tempest/services/compute/json/aggregates_client.py b/tempest/services/compute/json/aggregates_client.py
index aa52081..e26f570 100644
--- a/tempest/services/compute/json/aggregates_client.py
+++ b/tempest/services/compute/json/aggregates_client.py
@@ -43,7 +43,7 @@
     def create_aggregate(self, **kwargs):
         """Creates a new aggregate."""
         post_body = json.dumps({'aggregate': kwargs})
-        resp, body = self.post('os-aggregates', post_body, self.headers)
+        resp, body = self.post('os-aggregates', post_body)
 
         body = json.loads(body)
         return resp, body['aggregate']
@@ -55,8 +55,7 @@
             'availability_zone': availability_zone
         }
         put_body = json.dumps({'aggregate': put_body})
-        resp, body = self.put('os-aggregates/%s' % str(aggregate_id),
-                              put_body, self.headers)
+        resp, body = self.put('os-aggregates/%s' % str(aggregate_id), put_body)
 
         body = json.loads(body)
         return resp, body['aggregate']
@@ -79,7 +78,7 @@
         }
         post_body = json.dumps({'add_host': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
 
@@ -90,7 +89,7 @@
         }
         post_body = json.dumps({'remove_host': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
 
@@ -101,6 +100,6 @@
         }
         post_body = json.dumps({'set_metadata': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
diff --git a/tempest/services/compute/json/certificates_client.py b/tempest/services/compute/json/certificates_client.py
index b7135f6..de0f1a8 100644
--- a/tempest/services/compute/json/certificates_client.py
+++ b/tempest/services/compute/json/certificates_client.py
@@ -36,6 +36,6 @@
     def create_certificate(self):
         """create certificates."""
         url = "os-certificates"
-        resp, body = self.post(url, None, self.headers)
+        resp, body = self.post(url, None)
         body = json.loads(body)
         return resp, body['certificate']
diff --git a/tempest/services/compute/json/fixed_ips_client.py b/tempest/services/compute/json/fixed_ips_client.py
index 144b7dc..af750a3 100644
--- a/tempest/services/compute/json/fixed_ips_client.py
+++ b/tempest/services/compute/json/fixed_ips_client.py
@@ -36,5 +36,5 @@
     def reserve_fixed_ip(self, ip, body):
         """This reserves and unreserves fixed ips."""
         url = "os-fixed-ips/%s/action" % (ip)
-        resp, body = self.post(url, json.dumps(body), self.headers)
+        resp, body = self.post(url, json.dumps(body))
         return resp, body
diff --git a/tempest/services/compute/json/flavors_client.py b/tempest/services/compute/json/flavors_client.py
index 96ab6d7..289b09e 100644
--- a/tempest/services/compute/json/flavors_client.py
+++ b/tempest/services/compute/json/flavors_client.py
@@ -69,7 +69,7 @@
         if kwargs.get('is_public'):
             post_body['os-flavor-access:is_public'] = kwargs.get('is_public')
         post_body = json.dumps({'flavor': post_body})
-        resp, body = self.post('flavors', post_body, self.headers)
+        resp, body = self.post('flavors', post_body)
 
         body = json.loads(body)
         return resp, body['flavor']
@@ -92,7 +92,7 @@
         """Sets extra Specs to the mentioned flavor."""
         post_body = json.dumps({'extra_specs': specs})
         resp, body = self.post('flavors/%s/os-extra_specs' % flavor_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['extra_specs']
 
@@ -112,8 +112,7 @@
     def update_flavor_extra_spec(self, flavor_id, key, **kwargs):
         """Update specified extra Specs of the mentioned flavor and key."""
         resp, body = self.put('flavors/%s/os-extra_specs/%s' %
-                              (flavor_id, key),
-                              json.dumps(kwargs), self.headers)
+                              (flavor_id, key), json.dumps(kwargs))
         body = json.loads(body)
         return resp, body
 
@@ -124,8 +123,7 @@
 
     def list_flavor_access(self, flavor_id):
         """Gets flavor access information given the flavor id."""
-        resp, body = self.get('flavors/%s/os-flavor-access' % flavor_id,
-                              self.headers)
+        resp, body = self.get('flavors/%s/os-flavor-access' % flavor_id)
         body = json.loads(body)
         return resp, body['flavor_access']
 
@@ -137,8 +135,7 @@
             }
         }
         post_body = json.dumps(post_body)
-        resp, body = self.post('flavors/%s/action' % flavor_id,
-                               post_body, self.headers)
+        resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
         return resp, body['flavor_access']
 
@@ -150,7 +147,6 @@
             }
         }
         post_body = json.dumps(post_body)
-        resp, body = self.post('flavors/%s/action' % flavor_id,
-                               post_body, self.headers)
+        resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
         return resp, body['flavor_access']
diff --git a/tempest/services/compute/json/floating_ips_client.py b/tempest/services/compute/json/floating_ips_client.py
index 2bf5241..0385160 100644
--- a/tempest/services/compute/json/floating_ips_client.py
+++ b/tempest/services/compute/json/floating_ips_client.py
@@ -52,7 +52,7 @@
         url = 'os-floating-ips'
         post_body = {'pool': pool_name}
         post_body = json.dumps(post_body)
-        resp, body = self.post(url, post_body, self.headers)
+        resp, body = self.post(url, post_body)
         body = json.loads(body)
         return resp, body['floating_ip']
 
@@ -72,7 +72,7 @@
         }
 
         post_body = json.dumps(post_body)
-        resp, body = self.post(url, post_body, self.headers)
+        resp, body = self.post(url, post_body)
         return resp, body
 
     def disassociate_floating_ip_from_server(self, floating_ip, server_id):
@@ -85,7 +85,7 @@
         }
 
         post_body = json.dumps(post_body)
-        resp, body = self.post(url, post_body, self.headers)
+        resp, body = self.post(url, post_body)
         return resp, body
 
     def is_resource_deleted(self, id):
diff --git a/tempest/services/compute/json/hosts_client.py b/tempest/services/compute/json/hosts_client.py
index aa63927..d826a78 100644
--- a/tempest/services/compute/json/hosts_client.py
+++ b/tempest/services/compute/json/hosts_client.py
@@ -55,8 +55,7 @@
         request_body.update(**kwargs)
         request_body = json.dumps(request_body)
 
-        resp, body = self.put("os-hosts/%s" % str(hostname), request_body,
-                              self.headers)
+        resp, body = self.put("os-hosts/%s" % str(hostname), request_body)
         body = json.loads(body)
         return resp, body
 
diff --git a/tempest/services/compute/json/images_client.py b/tempest/services/compute/json/images_client.py
index 7324d84..b3d8c35 100644
--- a/tempest/services/compute/json/images_client.py
+++ b/tempest/services/compute/json/images_client.py
@@ -46,7 +46,7 @@
 
         post_body = json.dumps(post_body)
         resp, body = self.post('servers/%s/action' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         return resp, body
 
     def list_images(self, params=None):
@@ -93,16 +93,14 @@
     def set_image_metadata(self, image_id, meta):
         """Sets the metadata for an image."""
         post_body = json.dumps({'metadata': meta})
-        resp, body = self.put('images/%s/metadata' % str(image_id),
-                              post_body, self.headers)
+        resp, body = self.put('images/%s/metadata' % str(image_id), post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
     def update_image_metadata(self, image_id, meta):
         """Updates the metadata for an image."""
         post_body = json.dumps({'metadata': meta})
-        resp, body = self.post('images/%s/metadata' % str(image_id),
-                               post_body, self.headers)
+        resp, body = self.post('images/%s/metadata' % str(image_id), post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
@@ -116,7 +114,7 @@
         """Sets the value for a specific image metadata key."""
         post_body = json.dumps({'meta': meta})
         resp, body = self.put('images/%s/metadata/%s' % (str(image_id), key),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['meta']
 
diff --git a/tempest/services/compute/json/interfaces_client.py b/tempest/services/compute/json/interfaces_client.py
index d9a2030..f4c4c64 100644
--- a/tempest/services/compute/json/interfaces_client.py
+++ b/tempest/services/compute/json/interfaces_client.py
@@ -46,7 +46,6 @@
             post_body['interfaceAttachment']['fixed_ips'] = [fip]
         post_body = json.dumps(post_body)
         resp, body = self.post('servers/%s/os-interface' % server,
-                               headers=self.headers,
                                body=post_body)
         body = json.loads(body)
         return resp, body['interfaceAttachment']
diff --git a/tempest/services/compute/json/keypairs_client.py b/tempest/services/compute/json/keypairs_client.py
index 3e2d4a7..356c2e6 100644
--- a/tempest/services/compute/json/keypairs_client.py
+++ b/tempest/services/compute/json/keypairs_client.py
@@ -47,8 +47,7 @@
         if pub_key:
             post_body['keypair']['public_key'] = pub_key
         post_body = json.dumps(post_body)
-        resp, body = self.post("os-keypairs",
-                               headers=self.headers, body=post_body)
+        resp, body = self.post("os-keypairs", body=post_body)
         body = json.loads(body)
         return resp, body['keypair']
 
diff --git a/tempest/services/compute/json/quotas_client.py b/tempest/services/compute/json/quotas_client.py
index 2007d4e..7607cc0 100644
--- a/tempest/services/compute/json/quotas_client.py
+++ b/tempest/services/compute/json/quotas_client.py
@@ -96,8 +96,7 @@
             post_body['security_groups'] = security_groups
 
         post_body = json.dumps({'quota_set': post_body})
-        resp, body = self.put('os-quota-sets/%s' % str(tenant_id), post_body,
-                              self.headers)
+        resp, body = self.put('os-quota-sets/%s' % str(tenant_id), post_body)
 
         body = json.loads(body)
         return resp, body['quota_set']
diff --git a/tempest/services/compute/json/security_groups_client.py b/tempest/services/compute/json/security_groups_client.py
index edaf4a3..89906f3 100644
--- a/tempest/services/compute/json/security_groups_client.py
+++ b/tempest/services/compute/json/security_groups_client.py
@@ -58,7 +58,7 @@
             'description': description,
         }
         post_body = json.dumps({'security_group': post_body})
-        resp, body = self.post('os-security-groups', post_body, self.headers)
+        resp, body = self.post('os-security-groups', post_body)
         body = json.loads(body)
         return resp, body['security_group']
 
@@ -77,7 +77,7 @@
             post_body['description'] = description
         post_body = json.dumps({'security_group': post_body})
         resp, body = self.put('os-security-groups/%s' % str(security_group_id),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['security_group']
 
@@ -107,7 +107,7 @@
         }
         post_body = json.dumps({'security_group_rule': post_body})
         url = 'os-security-group-rules'
-        resp, body = self.post(url, post_body, self.headers)
+        resp, body = self.post(url, post_body)
         body = json.loads(body)
         return resp, body['security_group_rule']
 
diff --git a/tempest/services/compute/json/servers_client.py b/tempest/services/compute/json/servers_client.py
index 371a59c..025c4e5 100644
--- a/tempest/services/compute/json/servers_client.py
+++ b/tempest/services/compute/json/servers_client.py
@@ -78,7 +78,7 @@
             if value is not None:
                 post_body[post_param] = value
         post_body = json.dumps({'server': post_body})
-        resp, body = self.post('servers', post_body, self.headers)
+        resp, body = self.post('servers', post_body)
 
         body = json.loads(body)
         # NOTE(maurosr): this deals with the case of multiple server create
@@ -116,8 +116,7 @@
             post_body['OS-DCF:diskConfig'] = disk_config
 
         post_body = json.dumps({'server': post_body})
-        resp, body = self.put("servers/%s" % str(server_id),
-                              post_body, self.headers)
+        resp, body = self.put("servers/%s" % str(server_id), post_body)
         body = json.loads(body)
         return resp, body['server']
 
@@ -194,7 +193,7 @@
     def action(self, server_id, action_name, response_key, **kwargs):
         post_body = json.dumps({action_name: kwargs})
         resp, body = self.post('servers/%s/action' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         if response_key is not None:
             body = json.loads(body)[response_key]
         return resp, body
@@ -269,14 +268,14 @@
         else:
             post_body = json.dumps({'metadata': meta})
         resp, body = self.put('servers/%s/metadata' % str(server_id),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
     def update_server_metadata(self, server_id, meta):
         post_body = json.dumps({'metadata': meta})
         resp, body = self.post('servers/%s/metadata' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
@@ -288,7 +287,7 @@
     def set_server_metadata_item(self, server_id, key, meta):
         post_body = json.dumps({'meta': meta})
         resp, body = self.put('servers/%s/metadata/%s' % (str(server_id), key),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['meta']
 
@@ -312,7 +311,7 @@
             }
         })
         resp, body = self.post('servers/%s/os-volume_attachments' % server_id,
-                               post_body, self.headers)
+                               post_body)
         return resp, body
 
     def detach_volume(self, server_id, volume_id):
@@ -340,8 +339,7 @@
 
         req_body = json.dumps({'os-migrateLive': migrate_params})
 
-        resp, body = self.post("servers/%s/action" % str(server_id),
-                               req_body, self.headers)
+        resp, body = self.post("servers/%s/action" % str(server_id), req_body)
         return resp, body
 
     def migrate_server(self, server_id, **kwargs):
diff --git a/tempest/services/compute/json/services_client.py b/tempest/services/compute/json/services_client.py
index 4abee47..8380dc2 100644
--- a/tempest/services/compute/json/services_client.py
+++ b/tempest/services/compute/json/services_client.py
@@ -45,7 +45,7 @@
         binary: Service binary
         """
         post_body = json.dumps({'binary': binary, 'host': host_name})
-        resp, body = self.put('os-services/enable', post_body, self.headers)
+        resp, body = self.put('os-services/enable', post_body)
         body = json.loads(body)
         return resp, body['service']
 
@@ -56,6 +56,6 @@
         binary: Service binary
         """
         post_body = json.dumps({'binary': binary, 'host': host_name})
-        resp, body = self.put('os-services/disable', post_body, self.headers)
+        resp, body = self.put('os-services/disable', post_body)
         body = json.loads(body)
         return resp, body['service']
diff --git a/tempest/services/compute/json/volumes_extensions_client.py b/tempest/services/compute/json/volumes_extensions_client.py
index ba7b5df..4b9dc0b 100644
--- a/tempest/services/compute/json/volumes_extensions_client.py
+++ b/tempest/services/compute/json/volumes_extensions_client.py
@@ -75,7 +75,7 @@
         }
 
         post_body = json.dumps({'volume': post_body})
-        resp, body = self.post('os-volumes', post_body, self.headers)
+        resp, body = self.post('os-volumes', post_body)
         body = json.loads(body)
         return resp, body['volume']
 
diff --git a/tempest/services/compute/v3/json/aggregates_client.py b/tempest/services/compute/v3/json/aggregates_client.py
index 6bc758c..20ce87b 100644
--- a/tempest/services/compute/v3/json/aggregates_client.py
+++ b/tempest/services/compute/v3/json/aggregates_client.py
@@ -43,7 +43,7 @@
     def create_aggregate(self, **kwargs):
         """Creates a new aggregate."""
         post_body = json.dumps({'aggregate': kwargs})
-        resp, body = self.post('os-aggregates', post_body, self.headers)
+        resp, body = self.post('os-aggregates', post_body)
 
         body = json.loads(body)
         return resp, body['aggregate']
@@ -55,8 +55,7 @@
             'availability_zone': availability_zone
         }
         put_body = json.dumps({'aggregate': put_body})
-        resp, body = self.put('os-aggregates/%s' % str(aggregate_id),
-                              put_body, self.headers)
+        resp, body = self.put('os-aggregates/%s' % str(aggregate_id), put_body)
 
         body = json.loads(body)
         return resp, body['aggregate']
@@ -79,7 +78,7 @@
         }
         post_body = json.dumps({'add_host': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
 
@@ -90,7 +89,7 @@
         }
         post_body = json.dumps({'remove_host': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
 
@@ -101,6 +100,6 @@
         }
         post_body = json.dumps({'set_metadata': post_body})
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['aggregate']
diff --git a/tempest/services/compute/v3/json/certificates_client.py b/tempest/services/compute/v3/json/certificates_client.py
index 0c9f9ac..620eedf 100644
--- a/tempest/services/compute/v3/json/certificates_client.py
+++ b/tempest/services/compute/v3/json/certificates_client.py
@@ -36,6 +36,6 @@
     def create_certificate(self):
         """create certificates."""
         url = "os-certificates"
-        resp, body = self.post(url, None, self.headers)
+        resp, body = self.post(url, None)
         body = json.loads(body)
         return resp, body['certificate']
diff --git a/tempest/services/compute/v3/json/flavors_client.py b/tempest/services/compute/v3/json/flavors_client.py
index df3d0c1..f9df2b8 100644
--- a/tempest/services/compute/v3/json/flavors_client.py
+++ b/tempest/services/compute/v3/json/flavors_client.py
@@ -69,7 +69,7 @@
         if kwargs.get('is_public'):
             post_body['flavor-access:is_public'] = kwargs.get('is_public')
         post_body = json.dumps({'flavor': post_body})
-        resp, body = self.post('flavors', post_body, self.headers)
+        resp, body = self.post('flavors', post_body)
 
         body = json.loads(body)
         return resp, body['flavor']
@@ -92,7 +92,7 @@
         """Sets extra Specs to the mentioned flavor."""
         post_body = json.dumps({'extra_specs': specs})
         resp, body = self.post('flavors/%s/flavor-extra-specs' % flavor_id,
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['extra_specs']
 
@@ -112,8 +112,7 @@
     def update_flavor_extra_spec(self, flavor_id, key, **kwargs):
         """Update specified extra Specs of the mentioned flavor and key."""
         resp, body = self.put('flavors/%s/flavor-extra-specs/%s' %
-                              (flavor_id, key),
-                              json.dumps(kwargs), self.headers)
+                              (flavor_id, key), json.dumps(kwargs))
         body = json.loads(body)
         return resp, body
 
@@ -124,8 +123,7 @@
 
     def list_flavor_access(self, flavor_id):
         """Gets flavor access information given the flavor id."""
-        resp, body = self.get('flavors/%s/flavor-access' % flavor_id,
-                              self.headers)
+        resp, body = self.get('flavors/%s/flavor-access' % flavor_id)
         body = json.loads(body)
         return resp, body['flavor_access']
 
@@ -137,8 +135,7 @@
             }
         }
         post_body = json.dumps(post_body)
-        resp, body = self.post('flavors/%s/action' % flavor_id,
-                               post_body, self.headers)
+        resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
         return resp, body['flavor_access']
 
@@ -150,7 +147,6 @@
             }
         }
         post_body = json.dumps(post_body)
-        resp, body = self.post('flavors/%s/action' % flavor_id,
-                               post_body, self.headers)
+        resp, body = self.post('flavors/%s/action' % flavor_id, post_body)
         body = json.loads(body)
         return resp, body['flavor_access']
diff --git a/tempest/services/compute/v3/json/hosts_client.py b/tempest/services/compute/v3/json/hosts_client.py
index e33dd5f..76af626 100644
--- a/tempest/services/compute/v3/json/hosts_client.py
+++ b/tempest/services/compute/v3/json/hosts_client.py
@@ -55,8 +55,7 @@
         request_body.update(**kwargs)
         request_body = json.dumps({'host': request_body})
 
-        resp, body = self.put("os-hosts/%s" % str(hostname), request_body,
-                              self.headers)
+        resp, body = self.put("os-hosts/%s" % str(hostname), request_body)
         body = json.loads(body)
         return resp, body
 
diff --git a/tempest/services/compute/v3/json/interfaces_client.py b/tempest/services/compute/v3/json/interfaces_client.py
index 053b9af..c167520 100644
--- a/tempest/services/compute/v3/json/interfaces_client.py
+++ b/tempest/services/compute/v3/json/interfaces_client.py
@@ -45,7 +45,6 @@
             post_body['fixed_ips'] = [dict(ip_address=fixed_ip)]
         post_body = json.dumps({'interface_attachment': post_body})
         resp, body = self.post('servers/%s/os-attach-interfaces' % server,
-                               headers=self.headers,
                                body=post_body)
         body = json.loads(body)
         return resp, body['interface_attachment']
diff --git a/tempest/services/compute/v3/json/keypairs_client.py b/tempest/services/compute/v3/json/keypairs_client.py
index 05dbe25..821b86f 100644
--- a/tempest/services/compute/v3/json/keypairs_client.py
+++ b/tempest/services/compute/v3/json/keypairs_client.py
@@ -47,8 +47,7 @@
         if pub_key:
             post_body['keypair']['public_key'] = pub_key
         post_body = json.dumps(post_body)
-        resp, body = self.post("keypairs",
-                               headers=self.headers, body=post_body)
+        resp, body = self.post("keypairs", body=post_body)
         body = json.loads(body)
         return resp, body['keypair']
 
diff --git a/tempest/services/compute/v3/json/quotas_client.py b/tempest/services/compute/v3/json/quotas_client.py
index 1ec8651..a01b9d2 100644
--- a/tempest/services/compute/v3/json/quotas_client.py
+++ b/tempest/services/compute/v3/json/quotas_client.py
@@ -84,8 +84,7 @@
             post_body['security_groups'] = security_groups
 
         post_body = json.dumps({'quota_set': post_body})
-        resp, body = self.put('os-quota-sets/%s' % str(tenant_id), post_body,
-                              self.headers)
+        resp, body = self.put('os-quota-sets/%s' % str(tenant_id), post_body)
 
         body = json.loads(body)
         return resp, body['quota_set']
diff --git a/tempest/services/compute/v3/json/servers_client.py b/tempest/services/compute/v3/json/servers_client.py
index 11538f5..187c497 100644
--- a/tempest/services/compute/v3/json/servers_client.py
+++ b/tempest/services/compute/v3/json/servers_client.py
@@ -84,7 +84,7 @@
             if value is not None:
                 post_body[post_param] = value
         post_body = json.dumps({'server': post_body})
-        resp, body = self.post('servers', post_body, self.headers)
+        resp, body = self.post('servers', post_body)
 
         body = json.loads(body)
         # NOTE(maurosr): this deals with the case of multiple server create
@@ -121,8 +121,7 @@
             post_body['os-disk-config:disk_config'] = disk_config
 
         post_body = json.dumps({'server': post_body})
-        resp, body = self.put("servers/%s" % str(server_id),
-                              post_body, self.headers)
+        resp, body = self.put("servers/%s" % str(server_id), post_body)
         body = json.loads(body)
         return resp, body['server']
 
@@ -199,7 +198,7 @@
     def action(self, server_id, action_name, response_key, **kwargs):
         post_body = json.dumps({action_name: kwargs})
         resp, body = self.post('servers/%s/action' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         if response_key is not None:
             body = json.loads(body)[response_key]
         return resp, body
@@ -258,7 +257,7 @@
 
         post_body = json.dumps(post_body)
         resp, body = self.post('servers/%s/action' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         return resp, body
 
     def list_server_metadata(self, server_id):
@@ -272,14 +271,14 @@
         else:
             post_body = json.dumps({'metadata': meta})
         resp, body = self.put('servers/%s/metadata' % str(server_id),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
     def update_server_metadata(self, server_id, meta):
         post_body = json.dumps({'metadata': meta})
         resp, body = self.post('servers/%s/metadata' % str(server_id),
-                               post_body, self.headers)
+                               post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
@@ -291,7 +290,7 @@
     def set_server_metadata_item(self, server_id, key, meta):
         post_body = json.dumps({'metadata': meta})
         resp, body = self.put('servers/%s/metadata/%s' % (str(server_id), key),
-                              post_body, self.headers)
+                              post_body)
         body = json.loads(body)
         return resp, body['metadata']
 
@@ -327,7 +326,7 @@
         req_body = json.dumps({'migrate_live': migrate_params})
 
         resp, body = self.post("servers/%s/action" % str(server_id),
-                               req_body, self.headers)
+                               req_body)
         return resp, body
 
     def migrate_server(self, server_id, **kwargs):
diff --git a/tempest/services/compute/v3/json/services_client.py b/tempest/services/compute/v3/json/services_client.py
index 1082ea9..e20dfde 100644
--- a/tempest/services/compute/v3/json/services_client.py
+++ b/tempest/services/compute/v3/json/services_client.py
@@ -50,7 +50,7 @@
                 'host': host_name
             }
         })
-        resp, body = self.put('os-services/enable', post_body, self.headers)
+        resp, body = self.put('os-services/enable', post_body)
         body = json.loads(body)
         return resp, body['service']
 
@@ -66,6 +66,6 @@
                 'host': host_name
             }
         })
-        resp, body = self.put('os-services/disable', post_body, self.headers)
+        resp, body = self.put('os-services/disable', post_body)
         body = json.loads(body)
         return resp, body['service']
diff --git a/tempest/services/compute/xml/aggregates_client.py b/tempest/services/compute/xml/aggregates_client.py
index ba08f58..cf853ba 100644
--- a/tempest/services/compute/xml/aggregates_client.py
+++ b/tempest/services/compute/xml/aggregates_client.py
@@ -51,14 +51,13 @@
 
     def list_aggregates(self):
         """Get aggregate list."""
-        resp, body = self.get("os-aggregates", self.headers)
+        resp, body = self.get("os-aggregates")
         aggregates = self._parse_array(etree.fromstring(body))
         return resp, aggregates
 
     def get_aggregate(self, aggregate_id):
         """Get details of the given aggregate."""
-        resp, body = self.get("os-aggregates/%s" % str(aggregate_id),
-                              self.headers)
+        resp, body = self.get("os-aggregates/%s" % str(aggregate_id))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
 
@@ -68,8 +67,7 @@
                             name=name,
                             availability_zone=availability_zone)
         resp, body = self.post('os-aggregates',
-                               str(Document(post_body)),
-                               self.headers)
+                               str(Document(post_body)))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
 
@@ -79,15 +77,13 @@
                            name=name,
                            availability_zone=availability_zone)
         resp, body = self.put('os-aggregates/%s' % str(aggregate_id),
-                              str(Document(put_body)),
-                              self.headers)
+                              str(Document(put_body)))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
 
     def delete_aggregate(self, aggregate_id):
         """Deletes the given aggregate."""
-        return self.delete("os-aggregates/%s" % str(aggregate_id),
-                           self.headers)
+        return self.delete("os-aggregates/%s" % str(aggregate_id))
 
     def is_resource_deleted(self, id):
         try:
@@ -100,8 +96,7 @@
         """Adds a host to the given aggregate."""
         post_body = Element("add_host", host=host)
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               str(Document(post_body)),
-                               self.headers)
+                               str(Document(post_body)))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
 
@@ -109,8 +104,7 @@
         """Removes a host from the given aggregate."""
         post_body = Element("remove_host", host=host)
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               str(Document(post_body)),
-                               self.headers)
+                               str(Document(post_body)))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
 
@@ -124,7 +118,6 @@
             meta.append(Text(v))
             metadata.append(meta)
         resp, body = self.post('os-aggregates/%s/action' % aggregate_id,
-                               str(Document(post_body)),
-                               self.headers)
+                               str(Document(post_body)))
         aggregate = self._format_aggregate(etree.fromstring(body))
         return resp, aggregate
diff --git a/tempest/services/compute/xml/availability_zone_client.py b/tempest/services/compute/xml/availability_zone_client.py
index 38280b5..3d8ac8a 100644
--- a/tempest/services/compute/xml/availability_zone_client.py
+++ b/tempest/services/compute/xml/availability_zone_client.py
@@ -33,11 +33,11 @@
         return [xml_to_json(x) for x in node]
 
     def get_availability_zone_list(self):
-        resp, body = self.get('os-availability-zone', self.headers)
+        resp, body = self.get('os-availability-zone')
         availability_zone = self._parse_array(etree.fromstring(body))
         return resp, availability_zone
 
     def get_availability_zone_list_detail(self):
-        resp, body = self.get('os-availability-zone/detail', self.headers)
+        resp, body = self.get('os-availability-zone/detail')
         availability_zone = self._parse_array(etree.fromstring(body))
         return resp, availability_zone
diff --git a/tempest/services/compute/xml/certificates_client.py b/tempest/services/compute/xml/certificates_client.py
index aad20a4..4ee10c4 100644
--- a/tempest/services/compute/xml/certificates_client.py
+++ b/tempest/services/compute/xml/certificates_client.py
@@ -28,13 +28,13 @@
 
     def get_certificate(self, id):
         url = "os-certificates/%s" % (id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_resp(body)
         return resp, body
 
     def create_certificate(self):
         """create certificates."""
         url = "os-certificates"
-        resp, body = self.post(url, None, self.headers)
+        resp, body = self.post(url, None)
         body = self._parse_resp(body)
         return resp, body
diff --git a/tempest/services/compute/xml/extensions_client.py b/tempest/services/compute/xml/extensions_client.py
index 9753ca8..f97b64d 100644
--- a/tempest/services/compute/xml/extensions_client.py
+++ b/tempest/services/compute/xml/extensions_client.py
@@ -36,7 +36,7 @@
 
     def list_extensions(self):
         url = 'extensions'
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_array(etree.fromstring(body))
         return resp, body
 
@@ -46,6 +46,6 @@
         return any([e for e in exts if e['name'] == extension])
 
     def get_extension(self, extension_alias):
-        resp, body = self.get('extensions/%s' % extension_alias, self.headers)
+        resp, body = self.get('extensions/%s' % extension_alias)
         body = xml_to_json(etree.fromstring(body))
         return resp, body
diff --git a/tempest/services/compute/xml/fixed_ips_client.py b/tempest/services/compute/xml/fixed_ips_client.py
index 599e168..b89e096 100644
--- a/tempest/services/compute/xml/fixed_ips_client.py
+++ b/tempest/services/compute/xml/fixed_ips_client.py
@@ -31,7 +31,7 @@
 
     def get_fixed_ip_details(self, fixed_ip):
         url = "os-fixed-ips/%s" % (fixed_ip)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_resp(body)
         return resp, body
 
@@ -44,5 +44,5 @@
         key, value = body.popitem()
         xml_body = Element(key)
         xml_body.append(Text(value))
-        resp, body = self.post(url, str(Document(xml_body)), self.headers)
+        resp, body = self.post(url, str(Document(xml_body)))
         return resp, body
diff --git a/tempest/services/compute/xml/flavors_client.py b/tempest/services/compute/xml/flavors_client.py
index fb16d20..554b253 100644
--- a/tempest/services/compute/xml/flavors_client.py
+++ b/tempest/services/compute/xml/flavors_client.py
@@ -81,7 +81,7 @@
         if params:
             url += "?%s" % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         flavors = self._parse_array(etree.fromstring(body))
         return resp, flavors
 
@@ -94,7 +94,7 @@
         return self._list_flavors(url, params)
 
     def get_flavor_details(self, flavor_id):
-        resp, body = self.get("flavors/%s" % str(flavor_id), self.headers)
+        resp, body = self.get("flavors/%s" % str(flavor_id))
         body = xml_to_json(etree.fromstring(body))
         flavor = self._format_flavor(body)
         return resp, flavor
@@ -120,14 +120,14 @@
                             kwargs.get('is_public'))
         flavor.add_attr('xmlns:OS-FLV-EXT-DATA', XMLNS_OS_FLV_EXT_DATA)
         flavor.add_attr('xmlns:os-flavor-access', XMLNS_OS_FLV_ACCESS)
-        resp, body = self.post('flavors', str(Document(flavor)), self.headers)
+        resp, body = self.post('flavors', str(Document(flavor)))
         body = xml_to_json(etree.fromstring(body))
         flavor = self._format_flavor(body)
         return resp, flavor
 
     def delete_flavor(self, flavor_id):
         """Deletes the given flavor."""
-        return self.delete("flavors/%s" % str(flavor_id), self.headers)
+        return self.delete("flavors/%s" % str(flavor_id))
 
     def is_resource_deleted(self, id):
         # Did not use get_flavor_details(id) for verification as it gives
@@ -145,21 +145,20 @@
         for key in specs.keys():
             extra_specs.add_attr(key, specs[key])
         resp, body = self.post('flavors/%s/os-extra_specs' % flavor_id,
-                               str(Document(extra_specs)), self.headers)
+                               str(Document(extra_specs)))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
     def get_flavor_extra_spec(self, flavor_id):
         """Gets extra Specs of the mentioned flavor."""
-        resp, body = self.get('flavors/%s/os-extra_specs' % flavor_id,
-                              self.headers)
+        resp, body = self.get('flavors/%s/os-extra_specs' % flavor_id)
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
     def get_flavor_extra_spec_with_key(self, flavor_id, key):
         """Gets extra Specs key-value of the mentioned flavor and key."""
         resp, xml_body = self.get('flavors/%s/os-extra_specs/%s' %
-                                  (str(flavor_id), key), self.headers)
+                                  (str(flavor_id), key))
         body = {}
         element = etree.fromstring(xml_body)
         key = element.get('key')
@@ -176,8 +175,7 @@
             element.append(value)
 
         resp, body = self.put('flavors/%s/os-extra_specs/%s' %
-                              (flavor_id, key),
-                              str(doc), self.headers)
+                              (flavor_id, key), str(doc))
         body = xml_to_json(etree.fromstring(body))
         return resp, {key: body}
 
@@ -191,8 +189,7 @@
 
     def list_flavor_access(self, flavor_id):
         """Gets flavor access information given the flavor id."""
-        resp, body = self.get('flavors/%s/os-flavor-access' % str(flavor_id),
-                              self.headers)
+        resp, body = self.get('flavors/%s/os-flavor-access' % str(flavor_id))
         body = self._parse_array(etree.fromstring(body))
         return resp, body
 
@@ -202,8 +199,7 @@
         server = Element("addTenantAccess")
         doc.append(server)
         server.add_attr("tenant", tenant_id)
-        resp, body = self.post('flavors/%s/action' % str(flavor_id),
-                               str(doc), self.headers)
+        resp, body = self.post('flavors/%s/action' % str(flavor_id), str(doc))
         body = self._parse_array_access(etree.fromstring(body))
         return resp, body
 
@@ -213,7 +209,6 @@
         server = Element("removeTenantAccess")
         doc.append(server)
         server.add_attr("tenant", tenant_id)
-        resp, body = self.post('flavors/%s/action' % str(flavor_id),
-                               str(doc), self.headers)
+        resp, body = self.post('flavors/%s/action' % str(flavor_id), str(doc))
         body = self._parse_array_access(etree.fromstring(body))
         return resp, body
diff --git a/tempest/services/compute/xml/floating_ips_client.py b/tempest/services/compute/xml/floating_ips_client.py
index 0119d8a..d6decf3 100644
--- a/tempest/services/compute/xml/floating_ips_client.py
+++ b/tempest/services/compute/xml/floating_ips_client.py
@@ -48,14 +48,14 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_array(etree.fromstring(body))
         return resp, body
 
     def get_floating_ip_details(self, floating_ip_id):
         """Get the details of a floating IP."""
         url = "os-floating-ips/%s" % str(floating_ip_id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_floating_ip(etree.fromstring(body))
         if resp.status == 404:
             raise exceptions.NotFound(body)
@@ -69,16 +69,16 @@
             pool = Element("pool")
             pool.append(Text(pool_name))
             doc.append(pool)
-            resp, body = self.post(url, str(doc), self.headers)
+            resp, body = self.post(url, str(doc))
         else:
-            resp, body = self.post(url, None, self.headers)
+            resp, body = self.post(url, None)
         body = self._parse_floating_ip(etree.fromstring(body))
         return resp, body
 
     def delete_floating_ip(self, floating_ip_id):
         """Deletes the provided floating IP from the project."""
         url = "os-floating-ips/%s" % str(floating_ip_id)
-        resp, body = self.delete(url, self.headers)
+        resp, body = self.delete(url)
         return resp, body
 
     def associate_floating_ip_to_server(self, floating_ip, server_id):
@@ -88,7 +88,7 @@
         server = Element("addFloatingIp")
         doc.append(server)
         server.add_attr("address", floating_ip)
-        resp, body = self.post(url, str(doc), self.headers)
+        resp, body = self.post(url, str(doc))
         return resp, body
 
     def disassociate_floating_ip_from_server(self, floating_ip, server_id):
@@ -98,7 +98,7 @@
         server = Element("removeFloatingIp")
         doc.append(server)
         server.add_attr("address", floating_ip)
-        resp, body = self.post(url, str(doc), self.headers)
+        resp, body = self.post(url, str(doc))
         return resp, body
 
     def is_resource_deleted(self, id):
@@ -114,6 +114,6 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_array(etree.fromstring(body))
         return resp, body
diff --git a/tempest/services/compute/xml/hosts_client.py b/tempest/services/compute/xml/hosts_client.py
index daa83c9..13abe18 100644
--- a/tempest/services/compute/xml/hosts_client.py
+++ b/tempest/services/compute/xml/hosts_client.py
@@ -37,7 +37,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
@@ -45,7 +45,7 @@
     def show_host_detail(self, hostname):
         """Show detail information for the host."""
 
-        resp, body = self.get("os-hosts/%s" % str(hostname), self.headers)
+        resp, body = self.get("os-hosts/%s" % str(hostname))
         node = etree.fromstring(body)
         body = [xml_to_json(node)]
         return resp, body
@@ -58,8 +58,7 @@
             for k, v in kwargs.iteritems():
                 request_body.append(Element(k, v))
         resp, body = self.put("os-hosts/%s" % str(hostname),
-                              str(Document(request_body)),
-                              self.headers)
+                              str(Document(request_body)))
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
@@ -67,8 +66,7 @@
     def startup_host(self, hostname):
         """Startup a host."""
 
-        resp, body = self.get("os-hosts/%s/startup" % str(hostname),
-                              self.headers)
+        resp, body = self.get("os-hosts/%s/startup" % str(hostname))
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
@@ -76,8 +74,7 @@
     def shutdown_host(self, hostname):
         """Shutdown a host."""
 
-        resp, body = self.get("os-hosts/%s/shutdown" % str(hostname),
-                              self.headers)
+        resp, body = self.get("os-hosts/%s/shutdown" % str(hostname))
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
@@ -85,8 +82,7 @@
     def reboot_host(self, hostname):
         """Reboot a host."""
 
-        resp, body = self.get("os-hosts/%s/reboot" % str(hostname),
-                              self.headers)
+        resp, body = self.get("os-hosts/%s/reboot" % str(hostname))
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
diff --git a/tempest/services/compute/xml/hypervisor_client.py b/tempest/services/compute/xml/hypervisor_client.py
index 5abaad8..3c1ef08 100644
--- a/tempest/services/compute/xml/hypervisor_client.py
+++ b/tempest/services/compute/xml/hypervisor_client.py
@@ -33,46 +33,42 @@
 
     def get_hypervisor_list(self):
         """List hypervisors information."""
-        resp, body = self.get('os-hypervisors', self.headers)
+        resp, body = self.get('os-hypervisors')
         hypervisors = self._parse_array(etree.fromstring(body))
         return resp, hypervisors
 
     def get_hypervisor_list_details(self):
         """Show detailed hypervisors information."""
-        resp, body = self.get('os-hypervisors/detail', self.headers)
+        resp, body = self.get('os-hypervisors/detail')
         hypervisors = self._parse_array(etree.fromstring(body))
         return resp, hypervisors
 
     def get_hypervisor_show_details(self, hyper_id):
         """Display the details of the specified hypervisor."""
-        resp, body = self.get('os-hypervisors/%s' % hyper_id,
-                              self.headers)
+        resp, body = self.get('os-hypervisors/%s' % hyper_id)
         hypervisor = xml_to_json(etree.fromstring(body))
         return resp, hypervisor
 
     def get_hypervisor_servers(self, hyper_name):
         """List instances belonging to the specified hypervisor."""
-        resp, body = self.get('os-hypervisors/%s/servers' % hyper_name,
-                              self.headers)
+        resp, body = self.get('os-hypervisors/%s/servers' % hyper_name)
         hypervisors = self._parse_array(etree.fromstring(body))
         return resp, hypervisors
 
     def get_hypervisor_stats(self):
         """Get hypervisor statistics over all compute nodes."""
-        resp, body = self.get('os-hypervisors/statistics', self.headers)
+        resp, body = self.get('os-hypervisors/statistics')
         stats = xml_to_json(etree.fromstring(body))
         return resp, stats
 
     def get_hypervisor_uptime(self, hyper_id):
         """Display the uptime of the specified hypervisor."""
-        resp, body = self.get('os-hypervisors/%s/uptime' % hyper_id,
-                              self.headers)
+        resp, body = self.get('os-hypervisors/%s/uptime' % hyper_id)
         uptime = xml_to_json(etree.fromstring(body))
         return resp, uptime
 
     def search_hypervisor(self, hyper_name):
         """Search specified hypervisor."""
-        resp, body = self.get('os-hypervisors/%s/search' % hyper_name,
-                              self.headers)
+        resp, body = self.get('os-hypervisors/%s/search' % hyper_name)
         hypervisors = self._parse_array(etree.fromstring(body))
         return resp, hypervisors
diff --git a/tempest/services/compute/xml/images_client.py b/tempest/services/compute/xml/images_client.py
index d90a7d8..9f80c55 100644
--- a/tempest/services/compute/xml/images_client.py
+++ b/tempest/services/compute/xml/images_client.py
@@ -102,7 +102,7 @@
                 data.append(Text(v))
                 metadata.append(data)
         resp, body = self.post('servers/%s/action' % str(server_id),
-                               str(Document(post_body)), self.headers)
+                               str(Document(post_body)))
         return resp, body
 
     def list_images(self, params=None):
@@ -111,7 +111,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_images(etree.fromstring(body))
         return resp, body['images']
 
@@ -123,20 +123,20 @@
 
             url = "images/detail?" + param_list
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_images(etree.fromstring(body))
         return resp, body['images']
 
     def get_image(self, image_id):
         """Returns the details of a single image."""
-        resp, body = self.get("images/%s" % str(image_id), self.headers)
+        resp, body = self.get("images/%s" % str(image_id))
         self.expected_success(200, resp)
         body = self._parse_image(etree.fromstring(body))
         return resp, body
 
     def delete_image(self, image_id):
         """Deletes the provided image."""
-        return self.delete("images/%s" % str(image_id), self.headers)
+        return self.delete("images/%s" % str(image_id))
 
     def wait_for_image_status(self, image_id, status):
         """Waits for an image to reach a given status."""
@@ -152,8 +152,7 @@
 
     def list_image_metadata(self, image_id):
         """Lists all metadata items for an image."""
-        resp, body = self.get("images/%s/metadata" % str(image_id),
-                              self.headers)
+        resp, body = self.get("images/%s/metadata" % str(image_id))
         body = self._parse_key_value(etree.fromstring(body))
         return resp, body
 
@@ -161,7 +160,7 @@
         """Sets the metadata for an image."""
         post_body = self._metadata_body(meta)
         resp, body = self.put('images/%s/metadata' % image_id,
-                              str(Document(post_body)), self.headers)
+                              str(Document(post_body)))
         body = self._parse_key_value(etree.fromstring(body))
         return resp, body
 
@@ -169,14 +168,14 @@
         """Updates the metadata for an image."""
         post_body = self._metadata_body(meta)
         resp, body = self.post('images/%s/metadata' % str(image_id),
-                               str(Document(post_body)), self.headers)
+                               str(Document(post_body)))
         body = self._parse_key_value(etree.fromstring(body))
         return resp, body
 
     def get_image_metadata_item(self, image_id, key):
         """Returns the value for a specific image metadata key."""
         resp, body = self.get("images/%s/metadata/%s.xml" %
-                              (str(image_id), key), self.headers)
+                              (str(image_id), key))
         body = self._parse_metadata(etree.fromstring(body))
         return resp, body
 
@@ -186,7 +185,7 @@
             post_body = Element('meta', key=key)
             post_body.append(Text(v))
         resp, body = self.put('images/%s/metadata/%s' % (str(image_id), key),
-                              str(Document(post_body)), self.headers)
+                              str(Document(post_body)))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
@@ -194,14 +193,13 @@
         """Sets the value for a specific image metadata key."""
         post_body = Document('meta', Text(meta), key=key)
         resp, body = self.put('images/%s/metadata/%s' % (str(image_id), key),
-                              post_body, self.headers)
+                              post_body)
         body = xml_to_json(etree.fromstring(body))
         return resp, body['meta']
 
     def delete_image_metadata_item(self, image_id, key):
         """Deletes a single image metadata key/value pair."""
-        return self.delete("images/%s/metadata/%s" % (str(image_id), key),
-                           self.headers)
+        return self.delete("images/%s/metadata/%s" % (str(image_id), key))
 
     def is_resource_deleted(self, id):
         try:
diff --git a/tempest/services/compute/xml/instance_usage_audit_log_client.py b/tempest/services/compute/xml/instance_usage_audit_log_client.py
index 562774b..baa6966 100644
--- a/tempest/services/compute/xml/instance_usage_audit_log_client.py
+++ b/tempest/services/compute/xml/instance_usage_audit_log_client.py
@@ -31,12 +31,12 @@
 
     def list_instance_usage_audit_logs(self):
         url = 'os-instance_usage_audit_log'
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         instance_usage_audit_logs = xml_to_json(etree.fromstring(body))
         return resp, instance_usage_audit_logs
 
     def get_instance_usage_audit_log(self, time_before):
         url = 'os-instance_usage_audit_log/%s' % time_before
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         instance_usage_audit_log = xml_to_json(etree.fromstring(body))
         return resp, instance_usage_audit_log
diff --git a/tempest/services/compute/xml/interfaces_client.py b/tempest/services/compute/xml/interfaces_client.py
index 4194d7d..6155cd6 100644
--- a/tempest/services/compute/xml/interfaces_client.py
+++ b/tempest/services/compute/xml/interfaces_client.py
@@ -42,7 +42,7 @@
         return iface
 
     def list_interfaces(self, server):
-        resp, body = self.get('servers/%s/os-interface' % server, self.headers)
+        resp, body = self.get('servers/%s/os-interface' % server)
         node = etree.fromstring(body)
         interfaces = [self._process_xml_interface(x)
                       for x in node.getchildren()]
@@ -70,14 +70,12 @@
             iface.append(_fixed_ips)
         doc.append(iface)
         resp, body = self.post('servers/%s/os-interface' % server,
-                               headers=self.headers,
                                body=str(doc))
         body = self._process_xml_interface(etree.fromstring(body))
         return resp, body
 
     def show_interface(self, server, port_id):
-        resp, body = self.get('servers/%s/os-interface/%s' % (server, port_id),
-                              self.headers)
+        resp, body = self.get('servers/%s/os-interface/%s' % (server, port_id))
         body = self._process_xml_interface(etree.fromstring(body))
         return resp, body
 
diff --git a/tempest/services/compute/xml/keypairs_client.py b/tempest/services/compute/xml/keypairs_client.py
index 92fade4..5641251 100644
--- a/tempest/services/compute/xml/keypairs_client.py
+++ b/tempest/services/compute/xml/keypairs_client.py
@@ -33,13 +33,13 @@
         self.service = CONF.compute.catalog_type
 
     def list_keypairs(self):
-        resp, body = self.get("os-keypairs", self.headers)
+        resp, body = self.get("os-keypairs")
         node = etree.fromstring(body)
         body = [{'keypair': xml_to_json(x)} for x in node.getchildren()]
         return resp, body
 
     def get_keypair(self, key_name):
-        resp, body = self.get("os-keypairs/%s" % str(key_name), self.headers)
+        resp, body = self.get("os-keypairs/%s" % str(key_name))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
@@ -61,8 +61,7 @@
 
         doc.append(keypair_element)
 
-        resp, body = self.post("os-keypairs",
-                               headers=self.headers, body=str(doc))
+        resp, body = self.post("os-keypairs", body=str(doc))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
diff --git a/tempest/services/compute/xml/limits_client.py b/tempest/services/compute/xml/limits_client.py
index 2a8fbec..61c434c 100644
--- a/tempest/services/compute/xml/limits_client.py
+++ b/tempest/services/compute/xml/limits_client.py
@@ -30,7 +30,7 @@
         self.service = CONF.compute.catalog_type
 
     def get_absolute_limits(self):
-        resp, body = self.get("limits", self.headers)
+        resp, body = self.get("limits")
         body = objectify.fromstring(body)
         lim = NS + 'absolute'
         ret = {}
@@ -41,7 +41,7 @@
         return resp, ret
 
     def get_specific_absolute_limit(self, absolute_limit):
-        resp, body = self.get("limits", self.headers)
+        resp, body = self.get("limits")
         body = objectify.fromstring(body)
         lim = NS + 'absolute'
         ret = {}
diff --git a/tempest/services/compute/xml/quotas_client.py b/tempest/services/compute/xml/quotas_client.py
index f1041f0..00c3275 100644
--- a/tempest/services/compute/xml/quotas_client.py
+++ b/tempest/services/compute/xml/quotas_client.py
@@ -50,7 +50,7 @@
         """List the quota set for a tenant."""
 
         url = 'os-quota-sets/%s' % str(tenant_id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = xml_to_json(etree.fromstring(body))
         body = self._format_quota(body)
         return resp, body
@@ -59,7 +59,7 @@
         """List the default quota set for a tenant."""
 
         url = 'os-quota-sets/%s/defaults' % str(tenant_id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = xml_to_json(etree.fromstring(body))
         body = self._format_quota(body)
         return resp, body
@@ -119,8 +119,7 @@
             post_body.add_attr('security_groups', security_groups)
 
         resp, body = self.put('os-quota-sets/%s' % str(tenant_id),
-                              str(Document(post_body)),
-                              self.headers)
+                              str(Document(post_body)))
         body = xml_to_json(etree.fromstring(body))
         body = self._format_quota(body)
         return resp, body
diff --git a/tempest/services/compute/xml/security_groups_client.py b/tempest/services/compute/xml/security_groups_client.py
index 83072be..324e165 100644
--- a/tempest/services/compute/xml/security_groups_client.py
+++ b/tempest/services/compute/xml/security_groups_client.py
@@ -51,14 +51,14 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_array(etree.fromstring(body))
         return resp, body
 
     def get_security_group(self, security_group_id):
         """Get the details of a Security Group."""
         url = "os-security-groups/%s" % str(security_group_id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = self._parse_body(etree.fromstring(body))
         return resp, body
 
@@ -73,8 +73,7 @@
         des.append(Text(content=description))
         security_group.append(des)
         resp, body = self.post('os-security-groups',
-                               str(Document(security_group)),
-                               self.headers)
+                               str(Document(security_group)))
         body = self._parse_body(etree.fromstring(body))
         return resp, body
 
@@ -97,15 +96,13 @@
             security_group.append(des)
         resp, body = self.put('os-security-groups/%s' %
                               str(security_group_id),
-                              str(Document(security_group)),
-                              self.headers)
+                              str(Document(security_group)))
         body = self._parse_body(etree.fromstring(body))
         return resp, body
 
     def delete_security_group(self, security_group_id):
         """Deletes the provided Security Group."""
-        return self.delete('os-security-groups/%s' %
-                           str(security_group_id), self.headers)
+        return self.delete('os-security-groups/%s' % str(security_group_id))
 
     def create_security_group_rule(self, parent_group_id, ip_proto, from_port,
                                    to_port, **kwargs):
@@ -136,19 +133,19 @@
                 group_rule.append(element)
 
         url = 'os-security-group-rules'
-        resp, body = self.post(url, str(Document(group_rule)), self.headers)
+        resp, body = self.post(url, str(Document(group_rule)))
         body = self._parse_body(etree.fromstring(body))
         return resp, body
 
     def delete_security_group_rule(self, group_rule_id):
         """Deletes the provided Security Group rule."""
         return self.delete('os-security-group-rules/%s' %
-                           str(group_rule_id), self.headers)
+                           str(group_rule_id))
 
     def list_security_group_rules(self, security_group_id):
         """List all rules for a security group."""
         url = "os-security-groups"
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = etree.fromstring(body)
         secgroups = body.getchildren()
         for secgroup in secgroups:
diff --git a/tempest/services/compute/xml/servers_client.py b/tempest/services/compute/xml/servers_client.py
index 37980c9..a182d35 100644
--- a/tempest/services/compute/xml/servers_client.py
+++ b/tempest/services/compute/xml/servers_client.py
@@ -186,7 +186,7 @@
 
     def get_server(self, server_id):
         """Returns the details of an existing server."""
-        resp, body = self.get("servers/%s" % str(server_id), self.headers)
+        resp, body = self.get("servers/%s" % str(server_id))
         server = self._parse_server(etree.fromstring(body))
         return resp, server
 
@@ -245,7 +245,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         servers = self._parse_array(etree.fromstring(body))
         return resp, {"servers": servers}
 
@@ -254,7 +254,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         servers = self._parse_array(etree.fromstring(body))
         return resp, {"servers": servers}
 
@@ -282,8 +282,7 @@
                 meta.append(Text(v))
                 metadata.append(meta)
 
-        resp, body = self.put('servers/%s' % str(server_id),
-                              str(doc), self.headers)
+        resp, body = self.put('servers/%s' % str(server_id), str(doc))
         return resp, xml_to_json(etree.fromstring(body))
 
     def create_server(self, name, image_ref, flavor_ref, **kwargs):
@@ -356,7 +355,7 @@
                 temp.append(Text(k['contents']))
                 personality.append(temp)
 
-        resp, body = self.post('servers', str(Document(server)), self.headers)
+        resp, body = self.post('servers', str(Document(server)))
         server = self._parse_server(etree.fromstring(body))
         return resp, server
 
@@ -394,7 +393,7 @@
 
     def list_addresses(self, server_id):
         """Lists all addresses for a server."""
-        resp, body = self.get("servers/%s/ips" % str(server_id), self.headers)
+        resp, body = self.get("servers/%s/ips" % str(server_id))
 
         networks = {}
         xml_list = etree.fromstring(body)
@@ -407,8 +406,7 @@
     def list_addresses_by_network(self, server_id, network_id):
         """Lists all addresses of a specific network type for a server."""
         resp, body = self.get("servers/%s/ips/%s" % (str(server_id),
-                                                     network_id),
-                              self.headers)
+                                                     network_id))
         network = self._parse_network(etree.fromstring(body))
 
         return resp, network
@@ -417,8 +415,7 @@
         if 'xmlns' not in kwargs:
             kwargs['xmlns'] = XMLNS_11
         doc = Document((Element(action_name, **kwargs)))
-        resp, body = self.post("servers/%s/action" % server_id,
-                               str(doc), self.headers)
+        resp, body = self.post("servers/%s/action" % server_id, str(doc))
         if response_key is not None:
             body = xml_to_json(etree.fromstring(body))
         return resp, body
@@ -435,8 +432,7 @@
                            adminPass=password)
 
     def get_password(self, server_id):
-        resp, body = self.get("servers/%s/os-server-password" %
-                              str(server_id), self.headers)
+        resp, body = self.get("servers/%s/os-server-password" % str(server_id))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
@@ -446,8 +442,7 @@
         Note that this does not actually change the instance server
         password.
         """
-        return self.delete("servers/%s/os-server-password" %
-                           str(server_id))
+        return self.delete("servers/%s/os-server-password" % str(server_id))
 
     def reboot(self, server_id, reboot_type):
         return self.action(server_id, "reboot", None, type=reboot_type)
@@ -478,7 +473,7 @@
                 metadata.append(meta)
 
         resp, body = self.post('servers/%s/action' % server_id,
-                               str(Document(rebuild)), self.headers)
+                               str(Document(rebuild)))
         server = self._parse_server(etree.fromstring(body))
         return resp, server
 
@@ -523,12 +518,11 @@
                            host=dest_host)
 
         resp, body = self.post("servers/%s/action" % str(server_id),
-                               str(Document(req_body)), self.headers)
+                               str(Document(req_body)))
         return resp, body
 
     def list_server_metadata(self, server_id):
-        resp, body = self.get("servers/%s/metadata" % str(server_id),
-                              self.headers)
+        resp, body = self.get("servers/%s/metadata" % str(server_id))
         body = self._parse_key_value(etree.fromstring(body))
         return resp, body
 
@@ -541,8 +535,7 @@
                 meta_element = Element("meta", key=k)
                 meta_element.append(Text(v))
                 metadata.append(meta_element)
-        resp, body = self.put('servers/%s/metadata' % str(server_id),
-                              str(doc), self.headers)
+        resp, body = self.put('servers/%s/metadata' % str(server_id), str(doc))
         return resp, xml_to_json(etree.fromstring(body))
 
     def update_server_metadata(self, server_id, meta):
@@ -554,13 +547,12 @@
             meta_element.append(Text(v))
             metadata.append(meta_element)
         resp, body = self.post("/servers/%s/metadata" % str(server_id),
-                               str(doc), headers=self.headers)
+                               str(doc))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
     def get_server_metadata_item(self, server_id, key):
-        resp, body = self.get("servers/%s/metadata/%s" % (str(server_id), key),
-                              headers=self.headers)
+        resp, body = self.get("servers/%s/metadata/%s" % (str(server_id), key))
         return resp, dict([(etree.fromstring(body).attrib['key'],
                             xml_to_json(etree.fromstring(body)))])
 
@@ -571,7 +563,7 @@
             meta_element.append(Text(v))
             doc.append(meta_element)
         resp, body = self.put('servers/%s/metadata/%s' % (str(server_id), key),
-                              str(doc), self.headers)
+                              str(doc))
         return resp, xml_to_json(etree.fromstring(body))
 
     def delete_server_metadata_item(self, server_id, key):
@@ -588,7 +580,7 @@
         List the virtual interfaces used in an instance.
         """
         resp, body = self.get('/'.join(['servers', server_id,
-                              'os-virtual-interfaces']), self.headers)
+                              'os-virtual-interfaces']))
         virt_int = self._parse_xml_virtual_interfaces(etree.fromstring(body))
         return resp, virt_int
 
@@ -604,7 +596,7 @@
         post_body = Element("volumeAttachment", volumeId=volume_id,
                             device=device)
         resp, body = self.post('servers/%s/os-volume_attachments' % server_id,
-                               str(Document(post_body)), self.headers)
+                               str(Document(post_body)))
         return resp, body
 
     def detach_volume(self, server_id, volume_id):
@@ -616,22 +608,20 @@
 
     def get_server_diagnostics(self, server_id):
         """Get the usage data for a server."""
-        resp, body = self.get("servers/%s/diagnostics" % server_id,
-                              self.headers)
+        resp, body = self.get("servers/%s/diagnostics" % server_id)
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
     def list_instance_actions(self, server_id):
         """List the provided server action."""
-        resp, body = self.get("servers/%s/os-instance-actions" % server_id,
-                              self.headers)
+        resp, body = self.get("servers/%s/os-instance-actions" % server_id)
         body = self._parse_array(etree.fromstring(body))
         return resp, body
 
     def get_instance_action(self, server_id, request_id):
         """Returns the action details of the provided server."""
         resp, body = self.get("servers/%s/os-instance-actions/%s" %
-                              (server_id, request_id), self.headers)
+                              (server_id, request_id))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
diff --git a/tempest/services/compute/xml/services_client.py b/tempest/services/compute/xml/services_client.py
index c28dc12..5943ea9 100644
--- a/tempest/services/compute/xml/services_client.py
+++ b/tempest/services/compute/xml/services_client.py
@@ -38,7 +38,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         node = etree.fromstring(body)
         body = [xml_to_json(x) for x in node.getchildren()]
         return resp, body
@@ -53,8 +53,7 @@
         post_body.add_attr('binary', binary)
         post_body.add_attr('host', host_name)
 
-        resp, body = self.put('os-services/enable', str(Document(post_body)),
-                              self.headers)
+        resp, body = self.put('os-services/enable', str(Document(post_body)))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
@@ -68,7 +67,6 @@
         post_body.add_attr('binary', binary)
         post_body.add_attr('host', host_name)
 
-        resp, body = self.put('os-services/disable', str(Document(post_body)),
-                              self.headers)
+        resp, body = self.put('os-services/disable', str(Document(post_body)))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
diff --git a/tempest/services/compute/xml/tenant_usages_client.py b/tempest/services/compute/xml/tenant_usages_client.py
index 93eeb00..96c3147 100644
--- a/tempest/services/compute/xml/tenant_usages_client.py
+++ b/tempest/services/compute/xml/tenant_usages_client.py
@@ -39,7 +39,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         tenant_usage = self._parse_array(etree.fromstring(body))
         return resp, tenant_usage['tenant_usage']
 
@@ -48,6 +48,6 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         tenant_usage = self._parse_array(etree.fromstring(body))
         return resp, tenant_usage
diff --git a/tempest/services/compute/xml/volumes_extensions_client.py b/tempest/services/compute/xml/volumes_extensions_client.py
index 941cd69..a43fc21 100644
--- a/tempest/services/compute/xml/volumes_extensions_client.py
+++ b/tempest/services/compute/xml/volumes_extensions_client.py
@@ -60,7 +60,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = etree.fromstring(body)
         volumes = []
         if body is not None:
@@ -74,7 +74,7 @@
         if params:
             url += '?%s' % urllib.urlencode(params)
 
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = etree.fromstring(body)
         volumes = []
         if body is not None:
@@ -84,7 +84,7 @@
     def get_volume(self, volume_id):
         """Returns the details of a single volume."""
         url = "os-volumes/%s" % str(volume_id)
-        resp, body = self.get(url, self.headers)
+        resp, body = self.get(url)
         body = etree.fromstring(body)
         return resp, self._parse_volume(body)
 
@@ -110,8 +110,7 @@
                 meta.append(Text(value))
                 _metadata.append(meta)
 
-        resp, body = self.post('os-volumes', str(Document(volume)),
-                               self.headers)
+        resp, body = self.post('os-volumes', str(Document(volume)))
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
diff --git a/tempest/services/identity/v3/json/service_client.py b/tempest/services/identity/v3/json/service_client.py
index 10d4f97..c1faebb 100644
--- a/tempest/services/identity/v3/json/service_client.py
+++ b/tempest/services/identity/v3/json/service_client.py
@@ -61,11 +61,11 @@
             "description": description,
         }
         body = json.dumps({'service': body_dict})
-        resp, body = self.post("services", body, self.headers)
+        resp, body = self.post("services", body)
         body = json.loads(body)
         return resp, body["service"]
 
     def delete_service(self, serv_id):
         url = "services/" + serv_id
-        resp, body = self.delete(url, self.headers)
+        resp, body = self.delete(url)
         return resp, body
diff --git a/tempest/services/identity/v3/xml/service_client.py b/tempest/services/identity/v3/xml/service_client.py
index a2a81d2..be6c443 100644
--- a/tempest/services/identity/v3/xml/service_client.py
+++ b/tempest/services/identity/v3/xml/service_client.py
@@ -74,12 +74,11 @@
                             name=name,
                             description=description,
                             type=serv_type)
-        resp, body = self.post("services", str(Document(post_body)),
-                               self.headers)
+        resp, body = self.post("services", str(Document(post_body)))
         body = self._parse_body(etree.fromstring(body))
         return resp, body
 
     def delete_service(self, serv_id):
         url = "services/" + serv_id
-        resp, body = self.delete(url, self.headers)
+        resp, body = self.delete(url)
         return resp, body
diff --git a/tempest/services/network/network_client_base.py b/tempest/services/network/network_client_base.py
index f3f8d70..f1bf548 100644
--- a/tempest/services/network/network_client_base.py
+++ b/tempest/services/network/network_client_base.py
@@ -59,19 +59,15 @@
         raise NotImplementedError
 
     def post(self, uri, body, headers=None):
-        headers = headers or self.rest_client.headers
         return self.rest_client.post(uri, body, headers)
 
     def put(self, uri, body, headers=None):
-        headers = headers or self.rest_client.headers
         return self.rest_client.put(uri, body, headers)
 
     def get(self, uri, headers=None):
-        headers = headers or self.rest_client.headers
         return self.rest_client.get(uri, headers)
 
     def delete(self, uri, headers=None):
-        headers = headers or self.rest_client.headers
         return self.rest_client.delete(uri, headers)
 
     def deserialize_list(self, body):