diff --git a/test/test_variant_utils.py b/test/test_variant_utils.py
index 532681a03..896f4cb97 100644
--- a/test/test_variant_utils.py
+++ b/test/test_variant_utils.py
@@ -28,6 +28,7 @@ def test_variant_utils_basic(self):
         """ Tests the instantiation of a VariantUtils object """
         with self.mock_key_manager():
             vu = VariantUtils(env_name='cgap-dummy')
+            assert isinstance(vu, VariantUtils)
 
     @pytest.mark.parametrize('total_value', [
         100,