diff --git a/tests/boot-sector.c b/tests/boot-sector.c
index 7824286b9a..9e66c6d013 100644
--- a/tests/boot-sector.c
+++ b/tests/boot-sector.c
@@ -75,11 +75,11 @@ static const uint8_t s390x_psw_and_magic[] = {
     0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40   /* in the s390-ccw bios */
 };
 static const uint8_t s390x_code[] = {
-    0xa7, 0xf4, 0x00, 0x0a,                                /* j 0x10010 */
+    0xa7, 0xf4, 0x00, 0x08,                                /* j 0x10010 */
     0x00, 0x00, 0x00, 0x00,
     'S', '3', '9', '0',
     'E', 'P', 0x00, 0x01,
-    0xa7, 0x38, HIGH(SIGNATURE_ADDR), LOW(SIGNATURE_ADDR), /* lhi r3,0x7c10 */
+    0xa7, 0x39, HIGH(SIGNATURE_ADDR), LOW(SIGNATURE_ADDR), /* lghi r3,0x7c10 */
     0xa7, 0x48, LOW(SIGNATURE), HIGH(SIGNATURE),           /* lhi r4,0xadde */
     0x40, 0x40, 0x30, 0x00,                                /* sth r4,0(r3) */
     0xa7, 0xf4, 0xff, 0xfa                                 /* j 0x10010 */