--- suite/storage_engine/lock_concurrent.result
+++ suite/storage_engine/lock_concurrent.reject
@@ -4,6 +4,14 @@
 connect  con1,localhost,root,,;
 SET lock_wait_timeout = 1;
 LOCK TABLES t1 READ LOCAL;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+# ------------ UNEXPECTED RESULT ------------
+# The statement|command finished with ER_LOCK_WAIT_TIMEOUT.
+# LOCK .. WRITE CONCURRENT or the mix could be unsupported|malfunctioning, or the problem was caused by previous errors. 
+# You can change the engine code, or create an rdiff, or disable the test by adding it to disabled.def.
+# Further in this test, the message might sometimes be suppressed; a part of the test might be skipped.
+# Also, this problem may cause a chain effect (more errors of different kinds in the test).
+# -------------------------------------------
 UNLOCK TABLES;
 connection default;
 UNLOCK TABLES;
@@ -11,6 +19,7 @@
 LOCK TABLES t1 READ LOCAL;
 connection default;
 LOCK TABLES t1 WRITE CONCURRENT, t1 AS t2 READ;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
 UNLOCK TABLES;
 UNLOCK TABLES;
 DROP TABLE t1;
