diff --git a/module/core/former/tests/inc/only_test/with_field_under_feature.rs b/module/core/former/tests/inc/only_test/with_field_under_feature.rs
new file mode 100644
index 0000000000..2623f7579b
--- /dev/null
+++ b/module/core/former/tests/inc/only_test/with_field_under_feature.rs
@@ -0,0 +1,9 @@
+// xxx : need to fix
+// #[ derive( Former ) ]
+// struct Foo
+// {
+//   #[ cfg( feature = "baz" ) ]
+//   bar : i32,
+// }
+
+// error => Unknown attribute #[cfg(feature = "baz")]
\ No newline at end of file