diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index cf00bcafe4f1..7c7eb004e550 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -671,8 +671,6 @@ in {
           "modprobe bcache",
           "udevadm settle",
           "make-bcache -B /dev/vda4 -C /dev/vda3",
-          "echo /dev/vda3 > /sys/fs/bcache/register",
-          "echo /dev/vda4 > /sys/fs/bcache/register",
           "udevadm settle",
           "mkfs.ext3 -L nixos /dev/bcache0",
           "mount LABEL=nixos /mnt",