diff --git a/hosts/common/disks/test-disk.nix b/hosts/common/disks/test-disk.nix
deleted file mode 100644
index 53afb8e..0000000
--- a/hosts/common/disks/test-disk.nix
+++ /dev/null
@@ -1,43 +0,0 @@
-# NOTE: ... is needed because dikso passes diskoFile
-{
-  lib,
-  disk ? "/dev/vda",
-  withSwap ? false,
-  swapSize,
-  ...
-}: {
-  disko.devices = {
-    disk = {
-      disk0 = {
-        type = "disk";
-        device = disk;
-        content = {
-          type = "gpt";
-          partitions = {
-            boot = {
-              priority = 1;
-              name = "ESP";
-              start = "1M";
-              end = "512M";
-              type = "EF02";
-              content = {
-                type = "filesystem";
-                format = "vfat";
-                mountpoint = "/boot";
-                mountOptions = ["defaults"];
-              };
-            };
-            root = {
-              size = "100%";
-              content = {
-                type = "filesystem";
-                format = "ext4";
-                mountpoint = "/";
-              };
-            };
-          };
-        };
-      };
-    };
-  };
-}
diff --git a/hosts/nixos/Michishirube/default.nix b/hosts/nixos/Michishirube/default.nix
index 3fd3214..ca34897 100644
--- a/hosts/nixos/Michishirube/default.nix
+++ b/hosts/nixos/Michishirube/default.nix
@@ -14,7 +14,7 @@ in {
   imports = lib.flatten [
     # Disks
     inputs.disko.nixosModules.disko
-    (lib.custom.relativeToRoot "hosts/common/disks/test-disk.nix")
+    (lib.custom.relativeToRoot "hosts/common/disks/btrfs-disk.nix")
     {
       _module.args = {
         disk = "/dev/sda";