# X_TEST_STUB_TARGET_UNSUPPORTED

## Means

stub() was handed something that is not an action, llm(), query or job

## Typical cause

the argument is not a primitive action(), query() or job() built — often the action's result or its name

## Fix

`await stub(publishPost) — pass the action, llm(), query or job your module exports`

[Testing](/error-codes#testing)