diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index 22c9554705..5e421f7c54 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -543,7 +543,8 @@ where /gnu lives on a separate partition.")
     (bootloader (bootloader-configuration
                  (bootloader grub-bootloader)
                  (target "/dev/vdb")))
-    (kernel-arguments '("console=ttyS0"))
+    (kernel-arguments '("console=ttyS0"
+                        "raid0.default_layout=2"))
 
     ;; Add a kernel module for RAID-0 (aka. "stripe").
     (initrd-modules (cons "raid0" %base-initrd-modules))
@@ -578,9 +579,11 @@ export GUIX_BUILD_OPTIONS=--no-grafts
 parted --script /dev/vdb mklabel gpt \\
   mkpart primary ext2 1M 3M \\
   mkpart primary ext2 3M 600M \\
-  mkpart primary ext2 600M 1200M \\
+  mkpart primary ext2 600M 1.4G \\
   set 1 boot on \\
   set 1 bios_grub on
+modprobe raid0
+echo 1 > /sys/module/raid0/parameters/default_layout
 mdadm --create /dev/md0 --verbose --level=stripe --raid-devices=2 \\
   /dev/vdb2 /dev/vdb3
 mkfs.ext4 -L root-fs /dev/md0