diff --git a/maxscale-system-test/CMakeLists.txt b/maxscale-system-test/CMakeLists.txt
index c934225dc..20abc5853 100644
--- a/maxscale-system-test/CMakeLists.txt
+++ b/maxscale-system-test/CMakeLists.txt
@@ -594,6 +594,10 @@ add_test_executable(mxs1543.cpp mxs1543 avro LABELS REPL_BACKEND)
  # https://jira.mariadb.org/browse/MXS-1585
 add_test_executable(mxs1585.cpp mxs1585 mxs1585 LABELS REPL_BACKEND)
 
+ # MXS-1643: Too many monitor events are triggered
+ # https://jira.mariadb.org/browse/MXS-1643
+add_test_executable(mxs1643_extra_events.cpp mxs1643_extra_events mxs1643_extra_events LABELS REPL_BACKEND)
+
 # 'namedserverfilter' test
 add_test_executable(namedserverfilter.cpp namedserverfilter namedserverfilter LABELS namedserverfilter LIGHT REPL_BACKEND)
 
diff --git a/maxscale-system-test/cnf/maxscale.cnf.template.mxs1643_extra_events b/maxscale-system-test/cnf/maxscale.cnf.template.mxs1643_extra_events
new file mode 100644
index 000000000..99754a00a
--- /dev/null
+++ b/maxscale-system-test/cnf/maxscale.cnf.template.mxs1643_extra_events
@@ -0,0 +1,67 @@
+[maxscale]
+threads=###threads###
+
+[MySQL-Monitor]
+type=monitor
+module=mysqlmon
+servers= server1,server2,server3,server4
+user=maxskysql
+passwd= skysql
+monitor_interval=1000
+detect_standalone_master=true
+failcount=1
+allow_cluster_recovery=true
+replication_user=repl
+replication_password=repl
+backend_connect_timeout=3
+backend_read_timeout=3
+backend_write_timeout=3
+auto_failover=true
+auto_rejoin=true
+
+[RW Split Router]
+type=service
+router= readwritesplit
+servers=server1,server2,server3,server4
+user=maxskysql
+passwd=skysql
+
+[RW Split Listener]
+type=listener
+service=RW Split Router
+protocol=MySQLClient
+port=4006
+
+[CLI]
+type=service
+router=cli
+
+[CLI Listener]
+type=listener
+service=CLI
+protocol=maxscaled
+socket=default
+
+[server1]
+type=server
+address=###node_server_IP_1###
+port=###node_server_port_1###
+protocol=MySQLBackend
+
+[server2]
+type=server
+address=###node_server_IP_2###
+port=###node_server_port_2###
+protocol=MySQLBackend
+
+[server3]
+type=server
+address=###node_server_IP_3###
+port=###node_server_port_3###
+protocol=MySQLBackend
+
+[server4]
+type=server
+address=###node_server_IP_4###
+port=###node_server_port_4###
+protocol=MySQLBackend
diff --git a/maxscale-system-test/mxs1643_extra_events.cpp b/maxscale-system-test/mxs1643_extra_events.cpp
new file mode 100644
index 000000000..389a1dddd
--- /dev/null
+++ b/maxscale-system-test/mxs1643_extra_events.cpp
@@ -0,0 +1,39 @@
+/**
+ * MXS-1643: Too many monitor events are triggered
+ *
+ * https://jira.mariadb.org/browse/MXS-1643
+ */
+#include "testconnections.h"
+
+int main(int argc, char** argv)
+{
+    Mariadb_nodes::require_gtid(true);
+    TestConnections test(argc, argv);
+
+    // Check that master gets the slave status when set into read-only mode
+    test.tprintf("Set master into read-only mode");
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "SET GLOBAL read_only=ON");
+    sleep(10);
+    test.tprintf("Check that the current master now has the slave label");
+    test.check_log_err(0, "[Master, Running] -> [Running]", false);
+    test.check_log_err(0, "[Master, Running] -> [Slave, Running]", true);
+    execute_query(test.repl->nodes[0], "SET GLOBAL read_only=OFF");
+    sleep(5);
+    test.maxscales->ssh_node_f(0, true, "truncate -s 0 /var/log/maxscale/maxscale.log");
+
+    // Check that the Master and Slave status aren't both set
+    test.tprintf("Block master and wait for monitor to detect it.");
+    test.repl->block_node(0);
+    sleep(10);
+    test.tprintf("Check that the new master doesn't have both slave and master labels");
+    test.check_log_err(0, "[Slave, Running] -> [Master, Slave, Running]", false);
+    test.check_log_err(0, "[Slave, Running] -> [Master, Running]", true);
+    test.repl->unblock_node(0);
+
+
+    test.tprintf("Cleanup");
+    test.repl->execute_query_all_nodes( "STOP ALL SLAVES; RESET SLAVE ALL;");
+    test.repl->fix_replication();
+    return test.global_result;
+}
diff --git a/maxscale-system-test/testconnections.cpp b/maxscale-system-test/testconnections.cpp
index 93c0011c4..9e9f8c529 100644
--- a/maxscale-system-test/testconnections.cpp
+++ b/maxscale-system-test/testconnections.cpp
@@ -1111,55 +1111,63 @@ void TestConnections::check_log_err(int m, const char * err_msg, bool expected)
 
     char * err_log_content;
 
-    tprintf("Getting logs\n");
+    if (verbose)
+    {
+        tprintf("Getting logs");
+    }
     char sys1[4096];
     char dest[1024];
     char log_file[64];
-    set_timeout(100);
+    set_timeout(500);
     sprintf(dest, "maxscale_log_%03d/", m);
     sprintf(&sys1[0], "mkdir -p maxscale_log_%03d; rm -f %s*.log",
             m, dest);
-    //tprintf("Executing: %s\n", sys1);
+
     system(sys1);
-    set_timeout(50);
     sprintf(sys1, "%s/*", maxscales->maxscale_log_dir[m]);
     maxscales->copy_from_node(m, sys1, dest);
 
-    tprintf("Reading maxscale.log\n");
-    sprintf(log_file, "maxscale_log_%03d/maxscale.log", m);
-    if ( ( read_log(log_file, &err_log_content) != 0) || (strlen(err_log_content) < 2) )
+    if (verbose)
     {
-        tprintf("Reading maxscale1.log\n");
+        tprintf("Reading maxscale.log");
+    }
+    sprintf(log_file, "maxscale_log_%03d/maxscale.log", m);
+    if (read_log(log_file, &err_log_content) != 0 || strlen(err_log_content) < 2)
+    {
+        if (verbose)
+        {
+            tprintf("Reading maxscale1.log");
+        }
         sprintf(log_file, "maxscale_log_%03d/maxscale1.log", m);
         free(err_log_content);
         if (read_log(log_file, &err_log_content) != 0)
         {
-            add_result(1, "Error reading log\n");
+            add_result(1, "Error reading log");
         }
     }
-    //printf("\n\n%s\n\n", err_log_content);
+
     if (err_log_content != NULL)
     {
         if (expected)
         {
             if (strstr(err_log_content, err_msg) == NULL)
             {
-                add_result(1, "There is NO \"%s\" error in the log\n", err_msg);
+                add_result(1, "There is NO \"%s\" error in the log", err_msg);
             }
             else
             {
-                tprintf("There is proper \"%s \" error in the log\n", err_msg);
+                tprintf("There is a proper \"%s \" error in the log", err_msg);
             }
         }
         else
         {
             if (strstr(err_log_content, err_msg) != NULL)
             {
-                add_result(1, "There is UNEXPECTED error \"%s\" error in the log\n", err_msg);
+                add_result(1, "There is an UNEXPECTED \"%s\" error in the log", err_msg);
             }
             else
             {
-                tprintf("There are no unxpected errors \"%s \" error in the log\n", err_msg);
+                tprintf("There are no unxpected \"%s \" errors in the log", err_msg);
             }
         }