diff --git a/tests/fields/test_fields.py b/tests/fields/test_fields.py
index 652f6903..25ecb2e7 100644
--- a/tests/fields/test_fields.py
+++ b/tests/fields/test_fields.py
@@ -336,7 +336,7 @@ class TestField(MongoDBTestCase):
         doc.save()
 
         # Unset all the fields
-        HandleNoneFields._get_collection().update(
+        HandleNoneFields._get_collection().update_one(
             {"_id": doc.id},
             {"$unset": {"str_fld": 1, "int_fld": 1, "flt_fld": 1, "comp_dt_fld": 1}},
         )