diff --git a/mysql-test/suite/heap/blob_delayed_insert.test b/mysql-test/suite/heap/blob_delayed_insert.test
index eeb29b77c27e6..2b90ee520cffa 100644
--- a/mysql-test/suite/heap/blob_delayed_insert.test
+++ b/mysql-test/suite/heap/blob_delayed_insert.test
@@ -11,6 +11,11 @@
 # The binary log must be off: with statement binlogging INSERT DELAYED is
 # downgraded to an ordinary write lock and the delayed thread never runs.
 #
+# The embedded server has no delayed insert thread at all: the facility is
+# compiled out there, INSERT DELAYED is an ordinary insert, and no lock
+# cycle takes place.
+#
+--source include/not_embedded.inc
 
 CREATE TABLE t1 (a INT, b BLOB) ENGINE=MEMORY;
 
diff --git a/mysql-test/suite/heap/blob_online_alter.test b/mysql-test/suite/heap/blob_online_alter.test
index c6891493212c4..14a6ed129342d 100644
--- a/mysql-test/suite/heap/blob_online_alter.test
+++ b/mysql-test/suite/heap/blob_online_alter.test
@@ -12,7 +12,12 @@
 # the very statements this test needs to run.  It is released at the
 # post-downgrade point and only made to wait once it is replaying.
 #
+# The embedded server never runs an ALTER online: the online alter log is
+# part of the replication code, which is not built there, so the source
+# lock is not downgraded and the sync points below are never reached.
+#
 --source include/have_debug_sync.inc
+--source include/not_embedded.inc
 
 CREATE TABLE t1 (a INT PRIMARY KEY, b BLOB) ENGINE=MEMORY;
 INSERT INTO t1 VALUES (1, REPEAT('x', 300)), (2, REPEAT('y', 300)),