lustre/tests/sanityn.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lustre/tests/sanityn.sh b/lustre/tests/sanityn.sh
index 954f2ca4fd..6ed3593b7d 100755
--- a/lustre/tests/sanityn.sh
+++ b/lustre/tests/sanityn.sh
@@ -2513,8 +2513,8 @@ test_51d() {
 	local br=$(grep -A 10 $tfile /proc/$PID/smaps | awk '/^Rss/{print $2}')
 	echo "Before revoking layout lock: $br KB mapped"
 
-	# delete the file will revoke layout lock
-	rm -f $DIR2/$tfile
+	# cancel layout lock manually
+	cancel_lru_locks mdc
 
 	# rss after revoking
 	local ar=$(grep -A 10 $tfile /proc/$PID/smaps | awk '/^Rss/{print $2}')