HPCC-12759 Fix incorrect test (mostly harmless)

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #6773 from ghalliday/issue12759

HPCC-12759 Fix incorrect test (mostly harmless)

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>