/usr/lib/mysql-testsuite/collections/default.push is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | perl mysql-test-run.pl --timer --debug-server --force --parallel=auto --comment=n_mix-debug --vardir=var-n_mix --mysqld=--binlog-format=mixed --experimental=collections/default.experimental --skip-test-list=collections/disabled-per-push.list --unit-tests
perl mysql-test-run.pl --timer --debug-server --force --parallel=auto --comment=rpl_binlog_ps_row-debug --vardir=var-rpl_binlog-ps_row --suite=rpl,binlog --ps-protocol --mysqld=--binlog-format=row --experimental=collections/default.experimental --skip-test-list=collections/disabled-per-push.list
perl mysql-test-run.pl --timer --force --parallel=auto --comment=main_embedded-debug --vardir=var-main_embedded --suite=main --embedded --experimental=collections/default.experimental --skip-test-list=collections/disabled-per-push.list
perl mysql-test-run.pl --timer --debug-server --force --parallel=auto --comment=innodb_4k_size-debug --vardir=var-innodb-4k --experimental=collections/default.experimental --suite=innodb --mysqld=--innodb-page-size=4k --skip-test-list=collections/disabled-per-push.list
perl mysql-test-run.pl --timer --debug-server --force --parallel=auto --comment=rpl_binlog_n_mix_MTS-debug --vardir=var-mts-rpl-binlog-n_mix --mysqld=--binlog-format=mixed --experimental=collections/default.experimental --mysqld=--slave-parallel-workers=4 --mysqld=--slave-transaction-retries=0 --suite=rpl --skip-test-list=collections/disabled-per-push.list
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