diff --git a/tests/xfs/013 b/tests/xfs/013
index 049f0dcb..e95d0271 100755
--- a/tests/xfs/013
+++ b/tests/xfs/013
@@ -40,7 +40,8 @@ status=1	# failure is the default!
 
 _cleanup()
 {
-	killall fsstress 2>/dev/null
+	killall -9 fsstress 2>/dev/null
+	wait
 	cd /
 	umount $SCRATCH_MNT 2>/dev/null
 	rm -f $tmp.*