diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 5525c3117b79..2cfadf85c935 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -568,7 +568,7 @@ in {
           "pvcreate /dev/vda1 /dev/vda2",
           "vgcreate MyVolGroup /dev/vda1 /dev/vda2",
           "lvcreate --size 1G --name swap MyVolGroup",
-          "lvcreate --size 3G --name nixos MyVolGroup",
+          "lvcreate --size 6G --name nixos MyVolGroup",
           "mkswap -f /dev/MyVolGroup/swap -L swap",
           "swapon -L swap",
           "mkfs.xfs -L nixos /dev/MyVolGroup/nixos",