Well the point is that there are no injection points for the given unproxyable types. So there is no need for injection point resolution to a bean as stated in 3.11 Unproxyable Bean Types:

A bean type must be proxyable if an injection point resolves to a bean:
• that requires a client proxy, or
• that has an associated decorator, or
• that has a bound interceptor.
Otherwise, the container automatically detects the problem, and treats it as a deployment problem.

I think the test is OK.