diff --git a/mysql-test/suite/galera/r/MDEV-25731.result b/mysql-test/suite/galera/r/MDEV-25731.result
index 92e1704e658..c750affda3e 100644
--- a/mysql-test/suite/galera/r/MDEV-25731.result
+++ b/mysql-test/suite/galera/r/MDEV-25731.result
@@ -4,9 +4,7 @@ connection node_1;
 SET GLOBAL wsrep_load_data_splitting=ON;
 Warnings:
 Warning	1287	'@@wsrep_load_data_splitting' is deprecated and will be removed in a future release
-SET GLOBAL wsrep_replicate_myisam=ON;
-Warnings:
-Warning	1287	'@@wsrep_replicate_myisam' is deprecated and will be removed in a future release. Please use '@@wsrep_mode=REPLICATE_MYISAM' instead
+SET GLOBAL wsrep_mode=REPLICATE_MYISAM;
 CREATE TABLE t1 (c1 int) ENGINE=MYISAM;
 LOAD DATA INFILE '../../std_data/mdev-25731.dat' IGNORE INTO TABLE t1 LINES TERMINATED BY '\n';
 Warnings:
@@ -33,6 +31,4 @@ DROP TABLE t1;
 SET GLOBAL wsrep_load_data_splitting=OFF;
 Warnings:
 Warning	1287	'@@wsrep_load_data_splitting' is deprecated and will be removed in a future release
-SET GLOBAL wsrep_replicate_myisam=OFF;
-Warnings:
-Warning	1287	'@@wsrep_replicate_myisam' is deprecated and will be removed in a future release. Please use '@@wsrep_mode=REPLICATE_MYISAM' instead
+SET GLOBAL wsrep_mode=DEFAULT;
diff --git a/mysql-test/suite/galera/r/galera_wan_restart_sst.result b/mysql-test/suite/galera/r/galera_wan_restart_sst.result
index 2433a1d9c48..edaefe0e563 100644
--- a/mysql-test/suite/galera/r/galera_wan_restart_sst.result
+++ b/mysql-test/suite/galera/r/galera_wan_restart_sst.result
@@ -10,7 +10,7 @@ SELECT VARIABLE_VALUE AS EXPECT_4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VA
 EXPECT_4
 4
 connection node_1;
-CREATE TABLE t1 (f1 INTEGER);
+CREATE TABLE t1 (f1 INTEGER NOT NULL PRIMARY KEY) ENGINE=INNODB;
 INSERT INTO t1 VALUES (1);
 connection node_2;
 INSERT INTO t1 VALUES (2);
@@ -20,6 +20,8 @@ connection node_4;
 INSERT INTO t1 VALUES (4);
 connection node_3;
 INSERT INTO t1 VALUES (13);
+connection node_1;
+connection node_3;
 Killing server ...
 connection node_1;
 INSERT INTO t1 VALUES (11);
@@ -29,8 +31,11 @@ connection node_4;
 INSERT INTO t1 VALUES (14);
 connection node_3;
 INSERT INTO t1 VALUES (131);
+connection node_1;
 connection node_2;
 INSERT INTO t1 VALUES (22);
+connection node_1;
+connection node_2;
 Killing server ...
 connection node_1;
 INSERT INTO t1 VALUES (21);
@@ -42,6 +47,8 @@ connection node_2;
 INSERT INTO t1 VALUES (221);
 connection node_4;
 INSERT INTO t1 VALUES (34);
+connection node_1;
+connection node_4;
 Killing server ...
 connection node_1;
 INSERT INTO t1 VALUES (31);
diff --git a/mysql-test/suite/galera/t/MDEV-25731.test b/mysql-test/suite/galera/t/MDEV-25731.test
index c26fad2fa6a..8f5439704e8 100644
--- a/mysql-test/suite/galera/t/MDEV-25731.test
+++ b/mysql-test/suite/galera/t/MDEV-25731.test
@@ -3,7 +3,7 @@
 
 --connection node_1
 SET GLOBAL wsrep_load_data_splitting=ON;
-SET GLOBAL wsrep_replicate_myisam=ON;
+SET GLOBAL wsrep_mode=REPLICATE_MYISAM;
 CREATE TABLE t1 (c1 int) ENGINE=MYISAM;
 LOAD DATA INFILE '../../std_data/mdev-25731.dat' IGNORE INTO TABLE t1 LINES TERMINATED BY '\n';
 SELECT COUNT(*) AS EXPECT_6 FROM t1;
@@ -22,6 +22,6 @@ SELECT COUNT(*) AS EXPECT_12 FROM t1;
 --connection node_1
 DROP TABLE t1;
 SET GLOBAL wsrep_load_data_splitting=OFF;
-SET GLOBAL wsrep_replicate_myisam=OFF;
+SET GLOBAL wsrep_mode=DEFAULT;
 
 
diff --git a/mysql-test/suite/galera/t/galera_ist_mariabackup_verify_ca.cnf b/mysql-test/suite/galera/t/galera_ist_mariabackup_verify_ca.cnf
index f2187b83486..ffd2306bfb3 100644
--- a/mysql-test/suite/galera/t/galera_ist_mariabackup_verify_ca.cnf
+++ b/mysql-test/suite/galera/t/galera_ist_mariabackup_verify_ca.cnf
@@ -10,9 +10,11 @@ ssl-ca=@ENV.MYSQL_TEST_DIR/std_data/cacert.pem
 
 [mysqld.1]
 wsrep_provider_options='base_port=@mysqld.1.#galera_port;pc.ignore_sb=true'
+innodb-log-file-buffering
 
 [mysqld.2]
 wsrep_provider_options='base_port=@mysqld.2.#galera_port;pc.ignore_sb=true'
+innodb-log-file-buffering
 
 [sst]
 ssl-mode=VERIFY_CA
diff --git a/mysql-test/suite/galera/t/galera_wan_restart_sst.test b/mysql-test/suite/galera/t/galera_wan_restart_sst.test
index 7a8c0df4946..e904f46c06a 100644
--- a/mysql-test/suite/galera/t/galera_wan_restart_sst.test
+++ b/mysql-test/suite/galera/t/galera_wan_restart_sst.test
@@ -11,6 +11,7 @@
 --source include/big_test.inc
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
+--source include/force_restart.inc
 
 --connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3
 --connect node_4, 127.0.0.1, root, , test, $NODE_MYPORT_4
@@ -27,7 +28,7 @@
 SELECT VARIABLE_VALUE AS EXPECT_4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
 
 --connection node_1
-CREATE TABLE t1 (f1 INTEGER);
+CREATE TABLE t1 (f1 INTEGER NOT NULL PRIMARY KEY) ENGINE=INNODB;
 INSERT INTO t1 VALUES (1);
 
 --connection node_2
@@ -45,10 +46,20 @@ INSERT INTO t1 VALUES (4);
 
 --connection node_3
 INSERT INTO t1 VALUES (13);
-
---source include/kill_galera.inc
+--let $wait_condition = SELECT COUNT(*) = 5 FROM t1;
+--source include/wait_condition.inc
 
 --connection node_1
+--let $wait_condition = SELECT COUNT(*) = 5 FROM t1;
+--source include/wait_condition.inc
+
+--connection node_3
+--source include/kill_galera.inc
+--remove_file $MYSQLTEST_VARDIR/mysqld.3/data/grastate.dat
+
+--connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
 INSERT INTO t1 VALUES (11);
 
 --connection node_2
@@ -62,6 +73,10 @@ INSERT INTO t1 VALUES (14);
 
 INSERT INTO t1 VALUES (131);
 
+--connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
+
 #
 # Restart node #2
 #
@@ -69,9 +84,17 @@ INSERT INTO t1 VALUES (131);
 --connection node_2
 INSERT INTO t1 VALUES (22);
 
+--connection node_1
+--let $wait_condition = SELECT COUNT(*) = 10 FROM t1;
+--source include/wait_condition.inc
+
+--connection node_2
 --source include/kill_galera.inc
+--remove_file $MYSQLTEST_VARDIR/mysqld.2/data/grastate.dat
 
 --connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
 INSERT INTO t1 VALUES (21);
 
 --connection node_3
@@ -90,11 +113,21 @@ INSERT INTO t1 VALUES (221);
 #
 
 --connection node_4
+--let $wait_condition = SELECT VARIABLE_VALUE = 4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
 INSERT INTO t1 VALUES (34);
 
+--connection node_1
+--let $wait_condition = SELECT COUNT(*) = 15 FROM t1;
+--source include/wait_condition.inc
+
+--connection node_4
 --source include/kill_galera.inc
+--remove_file $MYSQLTEST_VARDIR/mysqld.4/data/grastate.dat
 
 --connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
 INSERT INTO t1 VALUES (31);
 
 --connection node_2
@@ -105,6 +138,7 @@ INSERT INTO t1 VALUES (33);
 
 --connection node_4
 --source include/start_mysqld.inc
+--remove_file $MYSQLTEST_VARDIR/mysqld.4/data/grastate.dat
 
 INSERT INTO t1 VALUES (341);
 
diff --git a/mysql-test/suite/galera/t/rpl_galera_to_mariadb_clone_slave_using_mariadb-backup.cnf b/mysql-test/suite/galera/t/rpl_galera_to_mariadb_clone_slave_using_mariadb-backup.cnf
index 52fd3093931..ebe1d47f200 100644
--- a/mysql-test/suite/galera/t/rpl_galera_to_mariadb_clone_slave_using_mariadb-backup.cnf
+++ b/mysql-test/suite/galera/t/rpl_galera_to_mariadb_clone_slave_using_mariadb-backup.cnf
@@ -1 +1,10 @@
 !include ../galera_2nodes_as_master.cnf
+
+[mysqld.1]
+innodb-log-file-buffering
+
+[mysqld.2]
+innodb-log-file-buffering
+
+[mysqld.3]
+innodb-log-file-buffering
diff --git a/mysql-test/suite/galera_3nodes/r/galera_allowlist.result b/mysql-test/suite/galera_3nodes/r/galera_allowlist.result
index 471444d8c08..a3fb6cf7db5 100644
--- a/mysql-test/suite/galera_3nodes/r/galera_allowlist.result
+++ b/mysql-test/suite/galera_3nodes/r/galera_allowlist.result
@@ -7,6 +7,9 @@ connection node_2;
 SELECT COUNT(*) = 3 FROM mysql.wsrep_allowlist;
 COUNT(*) = 3
 1
+connection node_1;
+connection node_2;
+connection node_3;
 connection node_3;
 SET @@global.wsrep_desync = 1;
 SET SESSION wsrep_sync_wait = 0;
diff --git a/mysql-test/suite/galera_3nodes/t/galera_allowlist.test b/mysql-test/suite/galera_3nodes/t/galera_allowlist.test
index 74fff61c4f8..de80965a584 100644
--- a/mysql-test/suite/galera_3nodes/t/galera_allowlist.test
+++ b/mysql-test/suite/galera_3nodes/t/galera_allowlist.test
@@ -12,6 +12,12 @@ SELECT COUNT(*) = 3 FROM mysql.wsrep_allowlist;
 --let $galera_server_number = 3
 --source include/galera_connect.inc
 
+# Save original auto_increment_offset values.
+--let $node_1=node_1
+--let $node_2=node_2
+--let $node_3=node_3
+--source ../galera/include/auto_increment_offset_save.inc
+
 --connection node_3
 # Desync and disconnect node 3 from the PC:
 SET @@global.wsrep_desync = 1;
@@ -64,3 +70,6 @@ CALL mtr.add_suppression('WSREP: Connection not allowed');
 
 --connection node_3
 CALL mtr.add_suppression('WSREP: Ignoring lack of quorum');
+
+# Restore original auto_increment_offset values.
+--source ../galera/include/auto_increment_offset_restore.inc
diff --git a/mysql-test/suite/galera_3nodes_sr/r/GCF-832.result b/mysql-test/suite/galera_3nodes_sr/r/GCF-832.result
index 9043c66840d..ef21e4ca347 100644
--- a/mysql-test/suite/galera_3nodes_sr/r/GCF-832.result
+++ b/mysql-test/suite/galera_3nodes_sr/r/GCF-832.result
@@ -6,20 +6,26 @@ connection node_2;
 connection node_3;
 connection node_2;
 SET GLOBAL debug_dbug="d,crash_last_fragment_commit_after_fragment_removal";
-CREATE TABLE t1 (f1 VARCHAR(30)) ENGINE=InnoDB;
+CREATE TABLE t1 (f1 VARCHAR(30) not null primary key) ENGINE=InnoDB;
 SET AUTOCOMMIT=OFF;
 SET SESSION wsrep_trx_fragment_size=1;
 START TRANSACTION;
-INSERT INTO t1 VALUES ('primary'),('primary'),('primary'),('primary'),('primary');
+INSERT INTO t1 VALUES ('primary1'),('primary2'),('primary3'),('primary4'),('primary5');
 COMMIT;
 Got one of the listed errors
+connection node_1;
+connection node_2;
 # restart
 connection node_1;
 SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
 COUNT(*) = 0
 1
+SELECT * FROM t1;
+f1
 connection node_2;
 SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
 COUNT(*) = 0
 1
+SELECT * FROM t1;
+f1
 DROP TABLE t1;
diff --git a/mysql-test/suite/galera_3nodes_sr/r/galera_sr_kill_slave_before_apply.result b/mysql-test/suite/galera_3nodes_sr/r/galera_sr_kill_slave_before_apply.result
index ef2bd7a45e1..08e3fc6c3e3 100644
--- a/mysql-test/suite/galera_3nodes_sr/r/galera_sr_kill_slave_before_apply.result
+++ b/mysql-test/suite/galera_3nodes_sr/r/galera_sr_kill_slave_before_apply.result
@@ -44,6 +44,7 @@ connection node_2;
 SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
 EXPECT_0
 0
+call mtr.add_suppression("WSREP: node uuid:.*");
 connection node_1;
 DROP TABLE t1;
 DROP TABLE t2;
diff --git a/mysql-test/suite/galera_3nodes_sr/t/GCF-832.test b/mysql-test/suite/galera_3nodes_sr/t/GCF-832.test
index 5da080a6c2c..2ecf5931b2a 100644
--- a/mysql-test/suite/galera_3nodes_sr/t/GCF-832.test
+++ b/mysql-test/suite/galera_3nodes_sr/t/GCF-832.test
@@ -4,6 +4,7 @@
 #
 --source include/galera_cluster.inc
 --source include/have_debug_sync.inc
+--source include/force_restart.inc
 
 --connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3
 # Save original auto_increment_offset values.
@@ -13,30 +14,42 @@
 --source ../galera/include/auto_increment_offset_save.inc
 
 --connection node_2
+--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
+
 SET GLOBAL debug_dbug="d,crash_last_fragment_commit_after_fragment_removal";
 
 --let $_expect_file_name= `select regexp_replace(@@tmpdir, '^.*/','')`
 --let $_expect_file_name= $MYSQLTEST_VARDIR/tmp/$_expect_file_name.expect
 --exec echo "wait" > $_expect_file_name
 
-CREATE TABLE t1 (f1 VARCHAR(30)) ENGINE=InnoDB;
+CREATE TABLE t1 (f1 VARCHAR(30) not null primary key) ENGINE=InnoDB;
 
 SET AUTOCOMMIT=OFF;
 SET SESSION wsrep_trx_fragment_size=1;
 START TRANSACTION;
 
-INSERT INTO t1 VALUES ('primary'),('primary'),('primary'),('primary'),('primary');
+INSERT INTO t1 VALUES ('primary1'),('primary2'),('primary3'),('primary4'),('primary5');
 --error 2013,2026
 COMMIT;
 
+--connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
+
+--connection node_2
 --source include/start_mysqld.inc
 
 --connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
 SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
+SELECT * FROM t1;
 
 --connection node_2
 --enable_reconnect
 SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
+SELECT * FROM t1;
 
 DROP TABLE t1;
 
diff --git a/mysql-test/suite/galera_3nodes_sr/t/galera_sr_kill_slave_before_apply.test b/mysql-test/suite/galera_3nodes_sr/t/galera_sr_kill_slave_before_apply.test
index 355db2de456..58d744e704d 100644
--- a/mysql-test/suite/galera_3nodes_sr/t/galera_sr_kill_slave_before_apply.test
+++ b/mysql-test/suite/galera_3nodes_sr/t/galera_sr_kill_slave_before_apply.test
@@ -6,6 +6,7 @@
 
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
+--source include/force_restart.inc
 
 --connect node_3, 127.0.0.1, root, , test, $NODE_MYPORT_3
 # Save original auto_increment_offset values.
@@ -86,6 +87,8 @@ SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
 
 --connection node_2
 SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
+# As noted above sometimes node delivers the same view twice
+call mtr.add_suppression("WSREP: node uuid:.*");
 
 --connection node_1
 DROP TABLE t1;