diff --git a/rally/plugins/openstack/cleanup/resources.py b/rally/plugins/openstack/cleanup/resources.py
index 4b579608..56ba77d7 100644
--- a/rally/plugins/openstack/cleanup/resources.py
+++ b/rally/plugins/openstack/cleanup/resources.py
@@ -189,8 +189,8 @@ class EC2Server(EC2Mixin, base.ResourceManager):
 
         # NOTE(wtakase): After instance deletion, instance can be 'terminated'
         #                state. If all instance states are 'terminated', this
-        #                returns True. And if get_only_instaces() returns empty
-        #                list, this also returns True because we consider
+        #                returns True. And if get_only_instances() returns an
+        #                empty list, this also returns True because we consider
         #                instance has already been deleted.
         return all(map(lambda i: i.state == "terminated", instances))
 
diff --git a/rally/plugins/openstack/scenarios/designate/utils.py b/rally/plugins/openstack/scenarios/designate/utils.py
index 18b5577e..32859e95 100644
--- a/rally/plugins/openstack/scenarios/designate/utils.py
+++ b/rally/plugins/openstack/scenarios/designate/utils.py
@@ -162,7 +162,7 @@ class DesignateScenario(scenario.OpenStackScenario):
         :param criterion: API Criterion to filter by
         :param marker: UUID marker of the item to start the page from
         :param limit: How many items to return in the page.
-        : returns: list of designate zones
+        :returns: list of designate zones
         """
         return self.clients("designate", version="2").zones.list()
 
diff --git a/rally/plugins/openstack/services/heat/main.py b/rally/plugins/openstack/services/heat/main.py
index ebb8ecbe..10862cfb 100644
--- a/rally/plugins/openstack/services/heat/main.py
+++ b/rally/plugins/openstack/services/heat/main.py
@@ -32,7 +32,6 @@ class Stack(common_utils.RandomNameGeneratorMixin):
 
         :param Scenario scenario: scenario instance
         :param Task task: task instance
-        :param str name: stack name
         :param str template: template file path
         :param dict files: dict with file name and path
         :param dict parameters: parameters for template