diff --git a/tests/migration/i386/a-b-bootblock.S b/tests/migration/i386/a-b-bootblock.S
index 3f97f28023..3d464c7568 100644
--- a/tests/migration/i386/a-b-bootblock.S
+++ b/tests/migration/i386/a-b-bootblock.S
@@ -50,6 +50,7 @@ innerloop:
         jl innerloop
 
         inc %bl
+        andb $0x3f,%bl
         jnz mainloop
 
         mov $66,%ax
diff --git a/tests/migration/i386/a-b-bootblock.h b/tests/migration/i386/a-b-bootblock.h
index 7d459d4fde..b7b0fce2ee 100644
--- a/tests/migration/i386/a-b-bootblock.h
+++ b/tests/migration/i386/a-b-bootblock.h
@@ -4,17 +4,17 @@
  * the header and the assembler differences in your patch submission.
  */
 unsigned char x86_bootsect[] = {
-  0xfa, 0x0f, 0x01, 0x16, 0x74, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00,
+  0xfa, 0x0f, 0x01, 0x16, 0x78, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00,
   0x0f, 0x22, 0xc0, 0x66, 0xea, 0x20, 0x7c, 0x00, 0x00, 0x08, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x92, 0x0c, 0x02,
   0xe6, 0x92, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x8e, 0xd8, 0x66, 0xb8, 0x41,
   0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xb3, 0x00, 0xb8, 0x00, 0x00, 0x10,
   0x00, 0xfe, 0x00, 0x05, 0x00, 0x10, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x40,
-  0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x75, 0xe9, 0x66, 0xb8, 0x42, 0x00, 0x66,
-  0xba, 0xf8, 0x03, 0xee, 0xeb, 0xde, 0x66, 0x90, 0x00, 0x00, 0x00, 0x00,
-  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00,
-  0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00, 0x27, 0x00, 0x5c, 0x7c,
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x80, 0xe3, 0x3f, 0x75, 0xe6, 0x66, 0xb8,
+  0x42, 0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xeb, 0xdb, 0x8d, 0x76, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
+  0x00, 0x9a, 0xcf, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00,
+  0x27, 0x00, 0x60, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,