diff --git a/mysql-test/include/search_pattern_in_file.inc b/mysql-test/include/search_pattern_in_file.inc
index 0d09cdcd36e..84237026ed0 100644
--- a/mysql-test/include/search_pattern_in_file.inc
+++ b/mysql-test/include/search_pattern_in_file.inc
@@ -60,12 +60,12 @@
 
 perl;
     use strict;
-    my $search_file=           $ENV{'SEARCH_FILE'}           or die "SEARCH_FILE not set";
-    my $search_pattern=        $ENV{'SEARCH_PATTERN'}        or die "SEARCH_PATTERN not set";
-    my $search_range=          $ENV{'SEARCH_RANGE'};
+    my $search_file=    $ENV{'SEARCH_FILE'}    or die "SEARCH_FILE not set";
+    my $search_pattern= $ENV{'SEARCH_PATTERN'} or die "SEARCH_PATTERN not set";
+    my $search_range=   $ENV{'SEARCH_RANGE'};
     my $file_content;
     $search_range= 50000 unless $search_range =~ /-?[0-9]+/;
-    open(FILE, "$search_file") or die("Unable to open '$search_file': $!\n");
+    open(FILE, '<', $search_file) or die("Unable to open '$search_file': $!\n");
     if ($search_range >= 0) {
        read(FILE, $file_content, $search_range, 0);
     } else {
@@ -75,7 +75,10 @@ perl;
        read(FILE, $file_content, -$search_range, 0);
     }
     close(FILE);
-    if ( not $file_content =~ m{$search_pattern} ) {
-       die("# ERROR: The file '$search_file' does not contain the expected pattern  $search_pattern\n->$file_content<-\n");
+    $search_file =~ s{^.*?([^/\\]+)$}{$1};
+    if ($file_content =~ m{$search_pattern}) {
+      print "FOUND /$search_pattern/ in $search_file\n"
+    } else {
+      print "NOT FOUND /$search_pattern/ in $search_file\n"
     }
 EOF
diff --git a/mysql-test/r/lowercase_fs_on.result b/mysql-test/r/lowercase_fs_on.result
index a090f46cfbf..b844b3f77dd 100644
--- a/mysql-test/r/lowercase_fs_on.result
+++ b/mysql-test/r/lowercase_fs_on.result
@@ -1,3 +1,4 @@
 #
 # Bug#20198490 : LOWER_CASE_TABLE_NAMES=0 ON WINDOWS LEADS TO PROBLEMS
 #
+FOUND /\[ERROR\] The server option \'lower_case_table_names\' is configured to use case sensitive table names/ in my_restart.err
diff --git a/mysql-test/r/named_pipe.result b/mysql-test/r/named_pipe.result
index ddd48f0ba91..43fb44beece 100644
--- a/mysql-test/r/named_pipe.result
+++ b/mysql-test/r/named_pipe.result
@@ -2154,3 +2154,4 @@ Privat (Private Nutzung)	Mobilfunk
 Warnings:
 Warning	1052	Column 'kundentyp' in group statement is ambiguous
 drop table t1;
+FOUND /\[ERROR\] Create named pipe failed/ in second-mysqld.err
diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index 52c379d03af..924b3a11fef 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -5432,6 +5432,7 @@ DROP FUNCTION f1;
 DROP VIEW v1;
 DROP TABLE t1, t2;
 create view v1 as select 1;
+FOUND /mariadb-version/ in v1.frm
 drop view v1;
 #
 # MDEV-7260: Crash in get_best_combination when executing multi-table
diff --git a/mysql-test/r/wait_timeout_not_windows.result b/mysql-test/r/wait_timeout_not_windows.result
index df70aa99221..867787a8ed3 100644
--- a/mysql-test/r/wait_timeout_not_windows.result
+++ b/mysql-test/r/wait_timeout_not_windows.result
@@ -1,3 +1,4 @@
 set global log_warnings=2;
 set @@wait_timeout=1;
+FOUND /Aborted.*Got timeout reading communication packets/ in mysqld.1.err
 set global log_warnings=@@log_warnings;
diff --git a/mysql-test/suite/innodb/r/innodb-change-buffer-recovery.result b/mysql-test/suite/innodb/r/innodb-change-buffer-recovery.result
index cc2a0373444..07e13008e27 100644
--- a/mysql-test/suite/innodb/r/innodb-change-buffer-recovery.result
+++ b/mysql-test/suite/innodb/r/innodb-change-buffer-recovery.result
@@ -33,6 +33,7 @@ INSERT INTO t1 VALUES(1,'X',1);
 SET DEBUG_DBUG='+d,crash_after_log_ibuf_upd_inplace';
 SELECT b FROM t1 LIMIT 3;
 ERROR HY000: Lost connection to MySQL server during query
+FOUND /Wrote log record for ibuf update in place operation/ in my_restart.err
 CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
diff --git a/mysql-test/suite/rpl/r/rpl_checksum.result b/mysql-test/suite/rpl/r/rpl_checksum.result
index 94d215e596a..9e37fbf40b1 100644
--- a/mysql-test/suite/rpl/r/rpl_checksum.result
+++ b/mysql-test/suite/rpl/r/rpl_checksum.result
@@ -143,6 +143,7 @@ SET debug_dbug= @old_dbug;
 INSERT INTO t4 VALUES (2);
 include/wait_for_slave_sql_error.inc [errno=1590]
 Last_SQL_Error = 'The incident LOST_EVENTS occurred on the master. Message: error writing to the binary log'
+FOUND /Slave SQL: The incident LOST_EVENTS occurred on the master\. Message: error writing to the binary log, Internal MariaDB error code: 1590/ in mysqld.2.err
 SELECT * FROM t4 ORDER BY a;
 a
 1
diff --git a/mysql-test/suite/rpl/r/rpl_gtid_errorlog.result b/mysql-test/suite/rpl/r/rpl_gtid_errorlog.result
index 204615201d9..e247ea9c2a7 100644
--- a/mysql-test/suite/rpl/r/rpl_gtid_errorlog.result
+++ b/mysql-test/suite/rpl/r/rpl_gtid_errorlog.result
@@ -38,5 +38,7 @@ a
 3
 4
 5
+FOUND /Slave SQL: Error 'Duplicate entry .* on query\. .*Query: '.*', Gtid 0-1-100, Internal MariaDB error code:|Slave SQL: Could not execute Write_rows.*table test.t1; Duplicate entry.*, Gtid 0-1-100, Internal MariaDB error/ in mysqld.2.err
+FOUND /Slave SQL: The incident LOST_EVENTS occurred on the master\. Message: <none>, Internal MariaDB error code: 1590/ in mysqld.2.err
 DROP TABLE t1;
 include/rpl_end.inc