diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index 0e50ac3..6d6000a 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -62,15 +62,15 @@
             cls.config.identity.uri
         )
 
-    def create_stack(self, stack_name, template_data, parameters={}):
-        resp, body = self.client.create_stack(
+    @classmethod
+    def create_stack(cls, stack_name, template_data, parameters={}):
+        resp, body = cls.client.create_stack(
             stack_name,
             template=template_data,
             parameters=parameters)
-        self.assertEqual('201', resp['status'])
         stack_id = resp['location'].split('/')[-1]
         stack_identifier = '%s/%s' % (stack_name, stack_id)
-        self.stacks.append(stack_identifier)
+        cls.stacks.append(stack_identifier)
         return stack_identifier
 
     @classmethod
@@ -88,11 +88,11 @@
             except Exception:
                 pass
 
-    def _create_keypair(self, namestart='keypair-heat-'):
+    @classmethod
+    def _create_keypair(cls, namestart='keypair-heat-'):
         kp_name = rand_name(namestart)
-        resp, body = self.keypairs_client.create_keypair(kp_name)
-        self.assertEqual(body['name'], kp_name)
-        self.keypairs.append(kp_name)
+        resp, body = cls.keypairs_client.create_keypair(kp_name)
+        cls.keypairs.append(kp_name)
         return body
 
     @classmethod
diff --git a/tempest/api/orchestration/stacks/test_instance_cfn_init.py b/tempest/api/orchestration/stacks/test_instance_cfn_init.py
index e3b8162..add8588 100644
--- a/tempest/api/orchestration/stacks/test_instance_cfn_init.py
+++ b/tempest/api/orchestration/stacks/test_instance_cfn_init.py
@@ -119,23 +119,21 @@
             raise cls.skipException("No image available to test")
         cls.client = cls.orchestration_client
 
-    def setUp(self):
-        super(InstanceCfnInitTestJSON, self).setUp()
         stack_name = rand_name('heat')
-        if self.orchestration_cfg.keypair_name:
-            keypair_name = self.orchestration_cfg.keypair_name
+        if cls.orchestration_cfg.keypair_name:
+            keypair_name = cls.orchestration_cfg.keypair_name
         else:
-            self.keypair = self._create_keypair()
-            keypair_name = self.keypair['name']
+            cls.keypair = cls._create_keypair()
+            keypair_name = cls.keypair['name']
 
         # create the stack
-        self.stack_identifier = self.create_stack(
+        cls.stack_identifier = cls.create_stack(
             stack_name,
-            self.template,
+            cls.template,
             parameters={
                 'KeyName': keypair_name,
-                'InstanceType': self.orchestration_cfg.instance_type,
-                'ImageId': self.orchestration_cfg.image_ref
+                'InstanceType': cls.orchestration_cfg.instance_type,
+                'ImageId': cls.orchestration_cfg.image_ref
             })
 
     @attr(type='gate')
diff --git a/tempest/config.py b/tempest/config.py
index 8795b33..f6fd1d9 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -15,9 +15,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import print_function
+
 import os
 import sys
 
+
 from oslo.config import cfg
 
 from tempest.common import log as logging
@@ -559,7 +562,7 @@
 
         if not os.path.exists(path):
             msg = "Config file %(path)s not found" % locals()
-            print >> sys.stderr, RuntimeError(msg)
+            print(RuntimeError(msg), file=sys.stderr)
         else:
             config_files.append(path)
 
diff --git a/tempest/services/orchestration/json/orchestration_client.py b/tempest/services/orchestration/json/orchestration_client.py
index 6b0e7e3..22f3f26 100644
--- a/tempest/services/orchestration/json/orchestration_client.py
+++ b/tempest/services/orchestration/json/orchestration_client.py
@@ -46,6 +46,35 @@
 
     def create_stack(self, name, disable_rollback=True, parameters={},
                      timeout_mins=60, template=None, template_url=None):
+        headers, body = self._prepare_update_create(
+            name,
+            disable_rollback,
+            parameters,
+            timeout_mins,
+            template,
+            template_url)
+        uri = 'stacks'
+        resp, body = self.post(uri, headers=headers, body=body)
+        return resp, body
+
+    def update_stack(self, stack_identifier, name, disable_rollback=True,
+                     parameters={}, timeout_mins=60, template=None,
+                     template_url=None):
+        headers, body = self._prepare_update_create(
+            name,
+            disable_rollback,
+            parameters,
+            timeout_mins,
+            template,
+            template_url)
+
+        uri = "stacks/%s" % stack_identifier
+        resp, body = self.put(uri, headers=headers, body=body)
+        return resp, body
+
+    def _prepare_update_create(self, name, disable_rollback=True,
+                               parameters={}, timeout_mins=60,
+                               template=None, template_url=None):
         post_body = {
             "stack_name": name,
             "disable_rollback": disable_rollback,
@@ -58,9 +87,13 @@
         if template_url:
             post_body['template_url'] = template_url
         body = json.dumps(post_body)
-        uri = 'stacks'
-        resp, body = self.post(uri, headers=self.headers, body=body)
-        return resp, body
+
+        # Password must be provided on stack create so that heat
+        # can perform future operations on behalf of the user
+        headers = dict(self.headers)
+        headers['X-Auth-Key'] = self.password
+        headers['X-Auth-User'] = self.user
+        return headers, body
 
     def get_stack(self, stack_identifier):
         """Returns the details of a single stack."""