diff --git a/src/llteacher/management/commands/populate_test_database.py b/src/llteacher/management/commands/populate_test_database.py
index 139f52c..4d84e90 100644
--- a/src/llteacher/management/commands/populate_test_database.py
+++ b/src/llteacher/management/commands/populate_test_database.py
@@ -81,7 +81,14 @@ def reset_database(self):
         Teacher.objects.all().delete()
         Student.objects.all().delete()
         User.objects.filter(
-            username__in=["admin", "teacher1", "teacher2", "student1", "student2", "student3"]
+            username__in=[
+                "admin",
+                "teacher1",
+                "teacher2",
+                "student1",
+                "student2",
+                "student3",
+            ]
         ).delete()
         self.stdout.write("  ✓ Database reset complete")