diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c
index ece25c694f..5b24cd26c1 100644
--- a/tests/boot-serial-test.c
+++ b/tests/boot-serial-test.c
@@ -75,11 +75,13 @@ typedef struct testdef {
 static testdef_t tests[] = {
     { "alpha", "clipper", "", "PCI:" },
     { "ppc", "ppce500", "", "U-Boot" },
-    { "ppc", "prep", "", "Open Hack'Ware BIOS" },
+    { "ppc", "prep", "-m 96", "Memory size: 96 MB" },
+    { "ppc", "40p", "-boot d", "Booting from device d" },
     { "ppc", "g3beige", "", "PowerPC,750" },
     { "ppc", "mac99", "", "PowerPC,G4" },
     { "ppc64", "ppce500", "", "U-Boot" },
-    { "ppc64", "prep", "", "Open Hack'Ware BIOS" },
+    { "ppc64", "prep", "-boot e", "Booting from device e" },
+    { "ppc64", "40p", "-m 192", "Memory size: 192 MB" },
     { "ppc64", "mac99", "", "PowerPC,970FX" },
     { "ppc64", "pseries", "", "Open Firmware" },
     { "ppc64", "powernv", "-cpu POWER8", "OPAL" },