diff --git a/lms/djangoapps/instructor_task/subtasks.py b/lms/djangoapps/instructor_task/subtasks.py
index 093eddce98..7ca32ddace 100644
--- a/lms/djangoapps/instructor_task/subtasks.py
+++ b/lms/djangoapps/instructor_task/subtasks.py
@@ -165,7 +165,7 @@ class SubtaskStatus(object):
         self.state = state if state is not None else QUEUING
 
     @classmethod
-    def from_dict(self, d):
+    def from_dict(cls, d):
         """Construct a SubtaskStatus object from a dict representation."""
         options = dict(d)
         task_id = options['task_id']
@@ -173,9 +173,9 @@ class SubtaskStatus(object):
         return SubtaskStatus.create(task_id, **options)
 
     @classmethod
-    def create(self, task_id, **options):
+    def create(cls, task_id, **options):
         """Construct a SubtaskStatus object."""
-        return self(task_id, **options)
+        return cls(task_id, **options)
 
     def to_dict(self):
         """
diff --git a/lms/djangoapps/shoppingcart/models.py b/lms/djangoapps/shoppingcart/models.py
index cd50e8f970..8b0c1c7268 100644
--- a/lms/djangoapps/shoppingcart/models.py
+++ b/lms/djangoapps/shoppingcart/models.py
@@ -1930,7 +1930,7 @@ class Donation(OrderItem):
         ).format(platform_name=settings.PLATFORM_NAME)
 
     @classmethod
-    def _line_item_description(self, course_id=None):
+    def _line_item_description(cls, course_id=None):
         """Create a line-item description for the donation.
 
         Includes the course display name if provided.