Any detail on that test ... ?
Wing boost pumps ON. Start engines and run at idle-
Turn off APU (to disable APU boost pump)
Switch off all 4 boost pumps.
Engine shall run at idle for 5 minutes.
If not look for leaks in suction feed system.
When I used to do this on the L1011, we did it at take off power. Turned off all the boost pumps at take off and watched that nothing else happened. The engine always continued to run as normal.