diff --git a/tests/apple2.dd.c b/tests/apple2.dd.c
index 7b4212d..f68acac 100644
--- a/tests/apple2.dd.c
+++ b/tests/apple2.dd.c
@@ -155,9 +155,9 @@ Test(apple2_dd, write)
     drive->data = vm_segment_create(_140K_);
     drive->image = drive->data;     // image doesn't matter
 
-    drive->latch = 123;
+    drive->latch = 129;
     apple2_dd_write(drive);
-    cr_assert_eq(vm_segment_get(drive->data, 0), 123);
+    cr_assert_eq(vm_segment_get(drive->data, 0), 129);
     cr_assert_eq(drive->track_pos, 0);
     cr_assert_eq(drive->sector_pos, 1);