The test count_plan_summary.js test executes a count operation on a parallel shell and is captured through a $curOp command. Once all the checks around the $curOp response finishes, the count operation gets killed by a killOp. If the count operation gets retried because of a QueryPlanKilled error caused by a concurrent moveCollection operation, we could miss the killOp and get a timeout failure waiting for the parallel shell to finish.

Hence, we need to disable this test on balancer suites.