modules-two-import.xq reads as follows:

(: insert-start :)
import module namespace test1="http://www.w3.org/TestModules/test1";
import module namespace test1="http://www.w3.org/TestModules/test1";
declare variable $input-context external;
(: insert-end :)
<result>{test1:ok()}</result>

An implementation might, before detecting the error condition XQST0047, report 
XQST0033. Do note that the same prefix is bound twice in the query.
Now, rather than adding XQST0033 as a valid error for the test, we would 
propose to make sure the XQST0033 error condition doesn't occur. I.e. use a 
different prefix for the second module import.

Thanks,
Marc