diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 93b6182a09cf..4fceb19f2342 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -404,7 +404,7 @@ in {
         "sgdisk -n 1:0:+1M -n 2:0:+100M -N 3 -t 1:ef02 -t 2:8200 -t 3:8300 -c 3:root /dev/vda",
         "mkswap /dev/vda2 -L swap",
         "swapon -L swap",
-        "mkfs.ext4 -L root /dev/vda2",
+        "mkfs.ext4 -L root /dev/vda3",
         "mount LABEL=root /mnt",
       );
     '';
@@ -423,7 +423,7 @@ in {
         "mkfs.ext4 -L root /dev/vda4",
         "mount LABEL=root /mnt",
         "mkdir /mnt/boot",
-        "$(blkid -o export /dev/vda2); mount /dev/disk/by-uuid/\\$UUID /mnt/boot"
+        "$(blkid -o export /dev/vda2); mount /dev/disk/by-uuid/\$UUID /mnt/boot"
       );
     '';
     grubIdentifier = "provided";