diff --git a/xmodule/tests/test_capa_block.py b/xmodule/tests/test_capa_block.py
index f7eb0307a4a6..a5b564324f5d 100644
--- a/xmodule/tests/test_capa_block.py
+++ b/xmodule/tests/test_capa_block.py
@@ -10,7 +10,7 @@
 import random
 import textwrap
 import unittest
-from unittest.mock import DEFAULT, Mock, patch
+from unittest.mock import DEFAULT, Mock, patch, PropertyMock
 
 import pytest
 import ddt