diff --git a/tests/vm-migration b/tests/vm-migration
index 97157e11..f364e079 100644
--- a/tests/vm-migration
+++ b/tests/vm-migration
@@ -122,7 +122,7 @@ lxc exec member1 -- lxc storage create ceph ceph
 lxc exec member1 -- lxc storage volume create ceph vol1 --type=block size=64MiB
 
 # Create a VM in the cluster, on member1.
-lxc exec member1 -- lxc init "${TEST_IMG:-ubuntu-minimal-daily:24.04}" v1 --vm --storage ceph --target member1 -c migration.stateful=true -c limits.memory=512MiB
+lxc exec member1 -- lxc init "${TEST_IMG:-ubuntu-minimal-daily:24.04}" v1 --vm --storage ceph --target member1 -c migration.stateful=true -c limits.memory=512MiB -d root,size=3584MiB
 
 # Add vol1 as a disk device to the VM.
 lxc exec member1 -- lxc config device add v1 vol1-disk disk pool=ceph source=vol1