diff --git a/gitlab/exceptions.py b/gitlab/exceptions.py
index 9a423dd4a..5825d2349 100644
--- a/gitlab/exceptions.py
+++ b/gitlab/exceptions.py
@@ -193,6 +193,10 @@ class GitlabHousekeepingError(GitlabOperationError):
     pass
 
 
+class GitlabOwnershipError(GitlabOperationError):
+    pass
+
+
 def raise_error_from_response(response, error, expected_code=200):
     """Tries to parse gitlab error message from response and raises error.
 
diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
index 19adb6296..f6dcb086b 100644
--- a/gitlab/v4/objects.py
+++ b/gitlab/v4/objects.py
@@ -2028,59 +2028,45 @@ class ProjectPipelineScheduleVariable(SaveMixin, ObjectDeleteMixin, RESTObject):
     _id_attr = 'key'
 
 
-class ProjectPipelineScheduleVariableManager(CRUDMixin, RESTManager):
-    _path = '/projects/%(project_id)s/pipeline_schedules/%(pipeline_schedule_id)s/variables'
+class ProjectPipelineScheduleVariableManager(CreateMixin, UpdateMixin,
+                                             DeleteMixin, RESTManager):
+    _path = ('/projects/%(project_id)s/pipeline_schedules/'
+             '%(pipeline_schedule_id)s/variables')
     _obj_cls = ProjectPipelineScheduleVariable
     _from_parent_attrs = {'project_id': 'project_id',
                           'pipeline_schedule_id' : 'id'}
-    _create_attrs = (('pipeline_schedule_id', 'key', 'value'), tuple())
     _create_attrs = (('key', 'value'), tuple())
+    _update_attrs = (('key', 'value'), tuple())
 
-    def list(self):
-        array = []
-        if 'variables' in self._parent._attrs:
-            for variable in self._parent._attrs['variables']:
-                schedule_variable = self._obj_cls(self, variable)
-                array.append(schedule_variable)
-        else:
-            obj = self._parent.manager.get(self._parent.id)
-            for variable in obj._attrs['variables']:
-                schedule_variable = self._obj_cls(self, variable)
-                array.append(schedule_variable)
 
-        return array
+class ProjectPipelineSchedule(SaveMixin, ObjectDeleteMixin, RESTObject):
+    _managers = (('variables', 'ProjectPipelineScheduleVariableManager'),)
 
+    @cli.register_custom_action('ProjectPipelineSchedule')
+    @exc.on_http_error(exc.GitlabOwnershipError)
+    def take_ownership(self, **kwargs):
+        """Update the owner of a pipeline schedule.
 
-class ProjectPipelineSchedule(RESTObject):
-    _managers = (
-        ('variables', 'ProjectPipelineScheduleVariableManager'),
-    )
+        Args:
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabAuthenticationError: If authentication is not correct
+            GitlabOwnershipError: If the request failed
+        """
+        path = '%s/%s/take_ownership' % (self.manager.path, self.get_id())
+        server_data = self.manager.gitlab.http_post(path, **kwargs)
+        self._update_attrs(server_data)
 
 
-class ProjectPipelineSchedulesManager(RetrieveMixin, CreateMixin, RESTManager):
+class ProjectPipelineScheduleManager(CRUDMixin, RESTManager):
     _path = '/projects/%(project_id)s/pipeline_schedules'
     _obj_cls = ProjectPipelineSchedule
     _from_parent_attrs = {'project_id': 'id'}
     _create_attrs = (('description', 'ref', 'cron'),
                      ('cron_timezone', 'active'))
-
-    def create(self, data, **kwargs):
-        """Creates a new object.
-
-        Args:
-            data (dict): Parameters to send to the server to create the
-                         resource
-            **kwargs: Extra options to send to the server (e.g. sudo)
-
-        Raises:
-            GitlabAuthenticationError: If authentication is not correct
-            GitlabCreateError: If the server cannot perform the request
-
-        Returns:
-            RESTObject: A new instance of the managed object class build with
-                the data sent by the server
-        """
-        return CreateMixin.create(self, data, path=self.path, **kwargs)
+    _update_attrs = (tuple(),
+                     ('description', 'ref', 'cron', 'cron_timezone', 'active'))
 
 
 class ProjectSnippetNote(SaveMixin, ObjectDeleteMixin, RESTObject):
@@ -2181,8 +2167,17 @@ class ProjectSnippetManager(CRUDMixin, RESTManager):
 
 class ProjectTrigger(SaveMixin, ObjectDeleteMixin, RESTObject):
     @cli.register_custom_action('ProjectTrigger')
+    @exc.on_http_error(exc.GitlabOwnershipError)
     def take_ownership(self, **kwargs):
-        """Update the owner of a trigger."""
+        """Update the owner of a trigger.
+
+        Args:
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabAuthenticationError: If authentication is not correct
+            GitlabOwnershipError: If the request failed
+        """
         path = '%s/%s/take_ownership' % (self.manager.path, self.get_id())
         server_data = self.manager.gitlab.http_post(path, **kwargs)
         self._update_attrs(server_data)
@@ -2398,7 +2393,7 @@ class Project(SaveMixin, ObjectDeleteMixin, RESTObject):
         ('pagesdomains', 'ProjectPagesDomainManager'),
         ('pipelines', 'ProjectPipelineManager'),
         ('protectedbranches', 'ProjectProtectedBranchManager'),
-        ('pipeline_schedules', 'ProjectPipelineSchedulesManager'),
+        ('pipelineschedules', 'ProjectPipelineScheduleManager'),
         ('runners', 'ProjectRunnerManager'),
         ('services', 'ProjectServiceManager'),
         ('snippets', 'ProjectSnippetManager'),