Test innodb.percona_log_slow_innodb is unstable

190423  2:30:20 [ 98%] innodb.percona_log_slow_innodb           w5  [ fail ]
        Test ended at 2019-04-23 02:30:20

CURRENT_TEST: innodb.percona_log_slow_innodb
--- /tmp/results/PS/mysql-test/suite/innodb/r/percona_log_slow_innodb.result	2019-04-23 02:54:14.000000000 +0300
+++ /tmp/results/PS/mysql-test/var/5/log/percona_log_slow_innodb.reject	2019-04-23 05:30:20.135805245 +0300
@@ -106,9 +106,9 @@
 [log_grep.inc] file: percona.slow_extended.innodb_3 pattern: ^# Filesort: (Yes|No)  Filesort_on_disk: (Yes|No)  Merge_passes: \d+$
 [log_grep.inc] lines:   0
 [log_grep.inc] file: percona.slow_extended.innodb_3 pattern: ^#   InnoDB_IO_r_ops: 0  InnoDB_IO_r_bytes: 0  InnoDB_IO_r_wait: 0\.0*$
-[log_grep.inc] lines:   1
-[log_grep.inc] file: percona.slow_extended.innodb_3 pattern: ^#   InnoDB_IO_r_ops: [1-9]\d*  InnoDB_IO_r_bytes: [1-9]\d*  InnoDB_IO_r_wait: (0\.\d*[1-9]\d*|[1-9]\d*\.\d+)$
 [log_grep.inc] lines:   0
+[log_grep.inc] file: percona.slow_extended.innodb_3 pattern: ^#   InnoDB_IO_r_ops: [1-9]\d*  InnoDB_IO_r_bytes: [1-9]\d*  InnoDB_IO_r_wait: (0\.\d*[1-9]\d*|[1-9]\d*\.\d+)$
+[log_grep.inc] lines:   1
 [log_grep.inc] file: percona.slow_extended.innodb_3 pattern: ^#   InnoDB_rec_lock_wait: \d*\.\d*  InnoDB_queue_wait: \d*\.\d*$
 [log_grep.inc] lines:   1
 [log_grep.inc] file: percona.slow_extended.innodb_3 pattern: InnoDB_rec_lock_wait: 0\.0*

mysqltest: Result content mismatch