diff --git a/tests/fields/test_enum_field.py b/tests/fields/test_enum_field.py
index 384e9afd..fc42487b 100644
--- a/tests/fields/test_enum_field.py
+++ b/tests/fields/test_enum_field.py
@@ -118,5 +118,5 @@ class TestFunkyEnumField(MongoDBTestCase):
 
         m = ModelWithFunkyColor(color=FunkyColor.YELLOW)
 
-        with pytest.raises(InvalidDocument, match="cannot encode object"):
+        with pytest.raises(InvalidDocument, match="[cC]annot encode object"):
             m.save()