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/usr/lib/mysql-testsuite/t/subquery_all.test is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.

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# 
# Run subquery.inc with all of the so-called 6.0 features.
#

--source include/have_semijoin.inc
--source include/have_materialization.inc
--source include/have_firstmatch.inc
--source include/have_loosescan.inc
--source include/have_index_condition_pushdown.inc
--source include/have_mrr.inc

set optimizer_switch='semijoin=on,materialization=on,firstmatch=on,loosescan=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=off';

--source include/subquery.inc

set optimizer_switch=default;