diff --git a/tests/zfs-tests/tests/functional/pool_checkpoint/checkpoint_discard_busy.ksh b/tests/zfs-tests/tests/functional/pool_checkpoint/checkpoint_discard_busy.ksh
index 087aef9027ea..07b658641f65 100755
--- a/tests/zfs-tests/tests/functional/pool_checkpoint/checkpoint_discard_busy.ksh
+++ b/tests/zfs-tests/tests/functional/pool_checkpoint/checkpoint_discard_busy.ksh
@@ -43,7 +43,7 @@ log_unsupported "Skipping, issue https://github.com/openzfs/zfs/issues/12053"
 function test_cleanup
 {
 	# reset memory limit to 16M
-	set_tunable64 SPA_DISCARD_MEMORY_LIMIT 1000000
+	set_tunable64 SPA_DISCARD_MEMORY_LIMIT 16777216
 	cleanup_nested_pools
 }