diff --git a/config/core/rootfs-configs.yaml b/config/core/rootfs-configs.yaml
index a82c92ae48..5606480b7a 100644
--- a/config/core/rootfs-configs.yaml
+++ b/config/core/rootfs-configs.yaml
@@ -325,6 +325,7 @@ rootfs_configs:
   bookworm-kvm-unit-tests:
     rootfs_type: debos
     debian_release: bookworm
+    imagesize: 2GB
     arch_list:
       - amd64
       - arm64