diff --git a/edx_exams/apps/core/management/commands/bulk_add_course_staff.py b/edx_exams/apps/core/management/commands/bulk_add_course_staff.py
index 63228c08..f6960832 100644
--- a/edx_exams/apps/core/management/commands/bulk_add_course_staff.py
+++ b/edx_exams/apps/core/management/commands/bulk_add_course_staff.py
@@ -4,7 +4,7 @@
 import time
 
 from django.core.management.base import BaseCommand
-from django.db import transaction, IntegrityError
+from django.db import IntegrityError, transaction
 
 from edx_exams.apps.core.models import CourseStaffRole, User
 
@@ -78,7 +78,7 @@ def add_course_staff_from_csv(self, csv_file, batch_size, batch_delay):
                         f'user with username.'
                     )
                     continue
-            users_dict = dict([(u.username, u) for (u, c) in users_list])
+            users_dict = {(u.username, u) for (u, c) in users_list}
             users.update(users_dict)
             time.sleep(batch_delay)