diff --git a/mysql-test/r/lock_sync.result b/mysql-test/r/lock_sync.result
index 49ef3bb1b37..18f3f6bc1a7 100644
--- a/mysql-test/r/lock_sync.result
+++ b/mysql-test/r/lock_sync.result
@@ -92,3 +92,23 @@ COMMIT;
 # Connection default
 # Reaping ALTER TABLE t1 ADD COLUMN j INT
 DROP TABLE t1, t2;
+#
+# Bug#51391 Deadlock involving events during rqg_info_schema test
+#
+CREATE EVENT e1 ON SCHEDULE EVERY 5 HOUR DO SELECT 1;
+CREATE EVENT e2 ON SCHEDULE EVERY 5 HOUR DO SELECT 2;
+# Connection con1
+SET DEBUG_SYNC="before_lock_tables_takes_lock SIGNAL drop WAIT_FOR query";
+# Sending:
+DROP EVENT e1;;
+# Connection default
+SET DEBUG_SYNC="now WAIT_FOR drop";
+SELECT name FROM mysql.event, INFORMATION_SCHEMA.GLOBAL_VARIABLES
+WHERE definer = VARIABLE_VALUE;
+name
+SET DEBUG_SYNC="now SIGNAL query";
+# Connection con1
+# Reaping: DROP EVENT t1
+# Connection default
+DROP EVENT e2;
+SET DEBUG_SYNC="RESET";
diff --git a/mysql-test/t/lock_sync.test b/mysql-test/t/lock_sync.test
index 97388e9c176..31884c1b79c 100644
--- a/mysql-test/t/lock_sync.test
+++ b/mysql-test/t/lock_sync.test
@@ -178,6 +178,39 @@ DROP TABLE t1, t2;
 disconnect con2;
 
 
+--echo #
+--echo # Bug#51391 Deadlock involving events during rqg_info_schema test
+--echo #
+
+CREATE EVENT e1 ON SCHEDULE EVERY 5 HOUR DO SELECT 1;
+CREATE EVENT e2 ON SCHEDULE EVERY 5 HOUR DO SELECT 2;
+
+--echo # Connection con1
+connect(con1, localhost, root);
+SET DEBUG_SYNC="before_lock_tables_takes_lock SIGNAL drop WAIT_FOR query";
+--echo # Sending:
+--send DROP EVENT e1;
+
+--echo # Connection default
+connection default;
+SET DEBUG_SYNC="now WAIT_FOR drop";
+SELECT name FROM mysql.event, INFORMATION_SCHEMA.GLOBAL_VARIABLES
+  WHERE definer = VARIABLE_VALUE;
+SET DEBUG_SYNC="now SIGNAL query";
+
+--echo # Connection con1
+connection con1;
+--echo # Reaping: DROP EVENT t1
+--reap
+disconnect con1;
+--source include/wait_until_disconnected.inc
+
+--echo # Connection default
+connection default;
+DROP EVENT e2;
+SET DEBUG_SYNC="RESET";
+
+
 # Check that all connections opened by test cases in this file are really
 # gone so execution of other tests won't be affected by their presence.
 --source include/wait_until_count_sessions.inc