diff --git a/heat/engine/clients/os/barbican.py b/heat/engine/clients/os/barbican.py
index f3892a02ec..de7cb7ded2 100644
--- a/heat/engine/clients/os/barbican.py
+++ b/heat/engine/clients/os/barbican.py
@@ -62,7 +62,7 @@ class BarbicanClientPlugin(client_plugin.ClientPlugin):
                 raise exception.EntityNotFound(
                     entity="Secret",
                     name=secret_ref)
-            raise ex
+            raise
 
     def get_container_by_ref(self, container_ref):
         try:
@@ -73,7 +73,7 @@ class BarbicanClientPlugin(client_plugin.ClientPlugin):
                 raise exception.EntityNotFound(
                     entity="Container",
                     name=container_ref)
-            raise ex
+            raise
 
 
 class SecretConstraint(constraints.BaseCustomConstraint):
diff --git a/heat/engine/clients/os/mistral.py b/heat/engine/clients/os/mistral.py
index 912d6d0c2d..50c9132ca7 100644
--- a/heat/engine/clients/os/mistral.py
+++ b/heat/engine/clients/os/mistral.py
@@ -59,7 +59,7 @@ class MistralClientPlugin(client_plugin.ClientPlugin):
                 raise exception.EntityNotFound(
                     entity="Workflow",
                     name=workflow_identifier)
-            raise ex
+            raise
 
 
 class WorkflowConstraint(constraints.BaseCustomConstraint):
diff --git a/heat/engine/resource.py b/heat/engine/resource.py
index 57c8c7c309..c5a1931a81 100644
--- a/heat/engine/resource.py
+++ b/heat/engine/resource.py
@@ -1734,7 +1734,7 @@ class Resource(object):
             if self.client_plugin().is_not_found(ex):
                 raise exception.EntityNotFound(
                     entity='Resource', name=self.name)
-            raise ex
+            raise
         return resource_data
 
     def parse_live_resource_data(self, resource_properties, resource_data):
diff --git a/heat/engine/resources/openstack/senlin/policy.py b/heat/engine/resources/openstack/senlin/policy.py
index 5e4f6a6a61..b64313eacb 100644
--- a/heat/engine/resources/openstack/senlin/policy.py
+++ b/heat/engine/resources/openstack/senlin/policy.py
@@ -107,7 +107,7 @@ class Policy(resource.Resource):
                         self.client_plugin().is_not_found(ex)):
                     bd['finished'] = True
                 else:
-                    raise ex
+                    raise
 
     def add_bindings(self, bindings):
         for bd in bindings:
diff --git a/heat/engine/resources/openstack/trove/os_database.py b/heat/engine/resources/openstack/trove/os_database.py
index b6764cd0c8..732aa0cf4d 100644
--- a/heat/engine/resources/openstack/trove/os_database.py
+++ b/heat/engine/resources/openstack/trove/os_database.py
@@ -500,7 +500,7 @@ class OSDBInstance(resource.Resource):
                         LOG.warning(_LW("Unexpected instance state change "
                                         "during update. Retrying."))
                         return False
-                raise exc
+                raise
         return True
 
     def _update_name(self, instance, name):
diff --git a/heat/engine/stack.py b/heat/engine/stack.py
index 21196ba937..3fa9093f11 100644
--- a/heat/engine/stack.py
+++ b/heat/engine/stack.py
@@ -762,7 +762,7 @@ class Stack(collections.Mapping):
                 if ignorable_errors and ex.error_code in ignorable_errors:
                     result = None
                 else:
-                    raise ex
+                    raise
             except AssertionError:
                 raise
             except Exception as ex: