diff --git a/mysql-test/suite/innodb/r/instant_alter_debug.result b/mysql-test/suite/innodb/r/instant_alter_debug.result
index 26db222ca82..11acb2734e7 100644
--- a/mysql-test/suite/innodb/r/instant_alter_debug.result
+++ b/mysql-test/suite/innodb/r/instant_alter_debug.result
@@ -207,10 +207,11 @@ DELETE FROM t1;
 connection ddl;
 SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
 ALTER TABLE t1 FORCE;
+connection default;
+SET DEBUG_SYNC = 'now WAIT_FOR copied';
 connection stop_purge;
 COMMIT;
 connection default;
-SET DEBUG_SYNC = 'now WAIT_FOR copied';
 InnoDB		1 transactions not purged
 INSERT INTO t1 SET a=1;
 INSERT INTO t1 SET a=2,b=3,c=4;
@@ -230,9 +231,9 @@ DELETE FROM t1;
 connection ddl;
 SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
 ALTER TABLE t1 ADD COLUMN b INT NOT NULL DEFAULT 2 AFTER a, FORCE;
-disconnect stop_purge;
 connection default;
 SET DEBUG_SYNC = 'now WAIT_FOR copied';
+disconnect stop_purge;
 InnoDB		1 transactions not purged
 INSERT INTO t1 SET a=1;
 INSERT INTO t1 SET a=2,c=4;
diff --git a/mysql-test/suite/innodb/t/instant_alter_debug.test b/mysql-test/suite/innodb/t/instant_alter_debug.test
index 8cf2610bbfb..f960affc372 100644
--- a/mysql-test/suite/innodb/t/instant_alter_debug.test
+++ b/mysql-test/suite/innodb/t/instant_alter_debug.test
@@ -237,11 +237,11 @@ connection ddl;
 SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
 send ALTER TABLE t1 FORCE;
 
-connection stop_purge;
-COMMIT;
-
 connection default;
 SET DEBUG_SYNC = 'now WAIT_FOR copied';
+connection stop_purge;
+COMMIT;
+connection default;
 let $wait_all_purged = 1;
 --source include/wait_all_purged.inc
 let $wait_all_purged = 0;
@@ -266,10 +266,9 @@ connection ddl;
 SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL copied WAIT_FOR logged';
 send ALTER TABLE t1 ADD COLUMN b INT NOT NULL DEFAULT 2 AFTER a, FORCE;
 
-disconnect stop_purge;
-
 connection default;
 SET DEBUG_SYNC = 'now WAIT_FOR copied';
+disconnect stop_purge;
 let $wait_all_purged = 1;
 --source include/wait_all_purged.inc
 let $wait_all_purged = 0;