I looked at the code generated by the #[derive(Accounts)] macro from your example and I think the problem is that Anchor doesn't treat the case where you're using an Accounts item defined in a different file. It forgets to append crate:: when using the generated modules for that item.

To confirm this, if you add this line to your test.rs file, your code will compile fine: use crate::{__client_accounts_test_common, __cpi_client_accounts_test_common};

The solution I can recommend is to define TestCommon in the same file as Test.

I looked at the code generated by the #[derive(Accounts)] macro from your example and I think the problem is that Anchor doesn't treat the case where you're using an Accounts item defined in a different file. It forgets to append crate:: when using the generated modules for that item.

To confirm this, if you add this line to your test.rs file, your code will compile fine: use crate::{__client_accounts_test_common, __cpi_client_accounts_test_common};

The solutions I can recommend:

• define TestCommon in the same file as Test
• or import everything from test_common not just TestCommon, so you'd use: use super::test_common::*;