diff --git a/xmodule/tests/test_capa_block.py b/xmodule/tests/test_capa_block.py
index 28b72013cd05..5da29ac3d20e 100644
--- a/xmodule/tests/test_capa_block.py
+++ b/xmodule/tests/test_capa_block.py
@@ -11,7 +11,7 @@
 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