diff --git a/tests/unit_tests/cad/test_cad.py b/tests/unit_tests/cad/test_cad.py
index 21a3a246d3..b6a8db9bd5 100644
--- a/tests/unit_tests/cad/test_cad.py
+++ b/tests/unit_tests/cad/test_cad.py
@@ -3,8 +3,6 @@ import pytest
 
 from subprocess import call
 
-from tests.unit_tests import assert_false
-
 def test_cad():
     assert not call(["openmc"])