diff --git a/mysql-test/include/shutdown_mysqld.inc b/mysql-test/include/shutdown_mysqld.inc
index fc2972560c37a..2db4624e4ac35 100644
--- a/mysql-test/include/shutdown_mysqld.inc
+++ b/mysql-test/include/shutdown_mysqld.inc
@@ -31,11 +31,8 @@ if ($rpl_inited)
 set @@global.log_warnings=0;
 --enable_query_log
 
---let $server_shutdown_timeout= 60
-if ($VALGRIND_TEST)
-{
-  --let $server_shutdown_timeout= 300
-}
+--source include/slow_environ.inc
+--let $server_shutdown_timeout= 60$_timeout_adjustment
 
 if ($shutdown_timeout)
 {
diff --git a/mysql-test/include/slow_environ.inc b/mysql-test/include/slow_environ.inc
new file mode 100644
index 0000000000000..761147fd2883e
--- /dev/null
+++ b/mysql-test/include/slow_environ.inc
@@ -0,0 +1,9 @@
+if (!$slow_environ_check)
+{
+  let $_timeout_adjustment=;
+  if (`select $VALGRIND_TEST + count(*) from information_schema.system_variables where variable_name='have_sanitizer' and global_value like '%SAN%'`)
+  {
+    let $_timeout_adjustment=0;
+  }
+  let $slow_environ_check=1;
+}
diff --git a/mysql-test/include/sync_slave_sql_with_io.inc b/mysql-test/include/sync_slave_sql_with_io.inc
index 9efede9a61f1d..c16d28edbb9c5 100644
--- a/mysql-test/include/sync_slave_sql_with_io.inc
+++ b/mysql-test/include/sync_slave_sql_with_io.inc
@@ -25,11 +25,8 @@
 let $_slave_timeout= $slave_timeout;
 if (!$_slave_timeout)
 {
-  let $_slave_timeout= 300;
-  if ($VALGRIND_TEST)
-  {
-    let $_slave_timeout= 1500;
-  }
+  source include/slow_environ.inc;
+  let $_slave_timeout= 300$_timeout_adjustment;
 }
 
 --let $_master_log_file= query_get_value(SHOW SLAVE STATUS, Master_Log_File, 1)
diff --git a/mysql-test/include/sync_with_master_gtid.inc b/mysql-test/include/sync_with_master_gtid.inc
index 777711b979c69..0ca2c90784e0d 100644
--- a/mysql-test/include/sync_with_master_gtid.inc
+++ b/mysql-test/include/sync_with_master_gtid.inc
@@ -33,11 +33,8 @@
 let $_slave_timeout= $slave_timeout;
 if (!$_slave_timeout)
 {
-  let $_slave_timeout= 120;
-  if ($VALGRIND_TEST)
-  {
-    let $_slave_timeout= 1200;
-  }
+  source include/slow_environ.inc;
+  let $_slave_timeout= 120$_timeout_adjustment;
 }
 
 --let $_result= `SELECT master_gtid_wait('$master_pos', $_slave_timeout)`
diff --git a/mysql-test/include/wait_for_slave_param.inc b/mysql-test/include/wait_for_slave_param.inc
index ed81c55963fe6..6802cd41203d9 100644
--- a/mysql-test/include/wait_for_slave_param.inc
+++ b/mysql-test/include/wait_for_slave_param.inc
@@ -49,11 +49,8 @@
 let $_slave_timeout= $slave_timeout;
 if (!$_slave_timeout)
 {
-  let $_slave_timeout= 300;
-  if ($VALGRIND_TEST)
-  {
-    let $_slave_timeout= 1500;
-  }
+  source include/slow_environ.inc;
+  let $_slave_timeout= 300$_timeout_adjustment;
 }
 
 let $_slave_param_comparison= $slave_param_comparison;