diff --git a/flake.lock b/flake.lock
index d463e7a..6a48a27 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,11 +18,11 @@
     },
     "nixos-unstable": {
       "locked": {
-        "lastModified": 1725448034,
-        "narHash": "sha256-YWbVeDERbIHAEQCtDtUunHYUNH31ReIdJIP8juXfdpM=",
+        "lastModified": 1726590405,
+        "narHash": "sha256-mDxHh5vQyBTjNKkp+l1/WL6cEDOjxyEQxv2c+dnw8Fg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9b40840066f93767bb528810ea7dc9caacd8997f",
+        "rev": "513193ba87b70f4d4e4d892f43fac30af286861b",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index ab15a11..4be9c83 100644
--- a/flake.nix
+++ b/flake.nix
@@ -58,23 +58,31 @@
           packages = forAllSystems (system: nixos-unstable.lib.mapAttrs' (n: nixos-unstable.lib.nameValuePair "package-${n}") self.packages.${system});
           checks =
             let
-              pkgs = nixos-unstable.legacyPackages.x86_64-linux;
+              pkgsUnstable = nixos-unstable.legacyPackages.x86_64-linux;
+              pkgsStable = nixos-stable.legacyPackages.x86_64-linux;
+
+              bootTests = pkgs: channel: suffix: pkgs.lib.mapAttrs' (name: pkgs.lib.nameValuePair "${name}${suffix}") (pkgs.callPackages ./nix/image-installer/tests.nix {
+                nixpkgs = channel;
+                nixosModules = self.nixosModules;
+              });
             in
             {
-              kexec-installer-unstable = pkgs.callPackage ./nix/kexec-installer/test.nix {
+              kexec-installer-unstable = pkgsUnstable.callPackage ./nix/kexec-installer/test.nix {
                 kexecTarball = self.packages.x86_64-linux.kexec-installer-nixos-unstable-noninteractive;
               };
-              shellcheck = pkgs.runCommand "shellcheck"
-                {
-                  nativeBuildInputs = [ pkgs.shellcheck ];
-                } ''
-                shellcheck ${(pkgs.nixos [self.nixosModules.kexec-installer]).config.system.build.kexecRun}
-                touch $out
-              '';
+
               kexec-installer-stable = nixos-stable.legacyPackages.x86_64-linux.callPackage ./nix/kexec-installer/test.nix {
                 kexecTarball = self.packages.x86_64-linux.kexec-installer-nixos-stable-noninteractive;
               };
-            };
+              shellcheck = pkgsUnstable.runCommand "shellcheck"
+                {
+                  nativeBuildInputs = [ pkgsUnstable.shellcheck ];
+                } ''
+                shellcheck ${(pkgsUnstable.nixos [self.nixosModules.kexec-installer]).config.system.build.kexecRun}
+                touch $out
+              '';
+            } // (bootTests pkgsUnstable nixos-unstable "-nixos-unstable")
+              // (bootTests pkgsStable nixos-stable "-nixos-stable");
         in
         nixos-unstable.lib.recursiveUpdate packages { x86_64-linux = checks; };
     };
diff --git a/garnix.yaml b/garnix.yaml
deleted file mode 100644
index 0c8008a..0000000
--- a/garnix.yaml
+++ /dev/null
@@ -1,5 +0,0 @@
-builds:
-  include:
-  - '*.x86_64-linux.*'
-  - '*.aarch64-linux.*'
-  - nixosConfigurations.*
diff --git a/nix/image-installer/tests.nix b/nix/image-installer/tests.nix
new file mode 100644
index 0000000..031c3e1
--- /dev/null
+++ b/nix/image-installer/tests.nix
@@ -0,0 +1,105 @@
+{
+  pkgs,
+  lib,
+  nixpkgs,
+  nixos,
+  nixosModules,
+}:
+
+let
+  testConfig = (
+    nixos [
+      (
+        { modulesPath, ... }:
+        {
+          imports = [
+            nixosModules.image-installer
+            "${modulesPath}/testing/test-instrumentation.nix"
+          ];
+        }
+      )
+    ]
+  );
+  iso = testConfig.config.system.build.isoImage;
+  mkStartCommand =
+    {
+      memory ? 2048,
+      cdrom ? null,
+      usb ? null,
+      uefi ? false,
+      extraFlags ? [ ],
+    }:
+    let
+      qemu-common = import (nixpkgs + "/nixos/lib/qemu-common.nix") { inherit lib pkgs; };
+      qemu = qemu-common.qemuBinary pkgs.qemu_test;
+
+      flags =
+        [
+          "-m"
+          (toString memory)
+          "-netdev"
+          "user,id=net0"
+          "-device"
+          "virtio-net-pci,netdev=net0"
+        ]
+        ++ lib.optionals (cdrom != null) [
+          "-cdrom"
+          cdrom
+        ]
+        ++ lib.optionals (usb != null) [
+          "-device"
+          "usb-ehci"
+          "-drive"
+          "id=usbdisk,file=${usb},if=none,readonly"
+          "-device"
+          "usb-storage,drive=usbdisk"
+        ]
+        ++ lib.optionals uefi [
+          "-drive"
+          "if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}"
+          "-drive"
+          "if=pflash,format=raw,unit=1,readonly=on,file=${pkgs.OVMF.variables}"
+        ]
+        ++ extraFlags;
+
+      flagsStr = lib.concatStringsSep " " flags;
+    in
+    "${qemu} ${flagsStr}";
+
+  makeBootTest =
+    name: config:
+    let
+      startCommand = mkStartCommand config;
+    in
+    pkgs.testers.runNixOSTest {
+      name = "boot-${name}";
+      nodes = { };
+      testScript = ''
+        machine = create_machine("${startCommand}")
+        machine.start()
+        machine.wait_for_unit("multi-user.target")
+        machine.succeed("nix store verify --no-trust -r --option experimental-features nix-command /run/current-system")
+
+        machine.shutdown()
+      '';
+    };
+in
+{
+  uefi-cdrom = makeBootTest "uefi-cdrom" {
+    uefi = true;
+    cdrom = "${iso}/iso/nixos-installer-${pkgs.hostPlatform.system}.iso";
+  };
+
+  uefi-usb = makeBootTest "uefi-usb" {
+    uefi = true;
+    usb = "${iso}/iso/nixos-installer-${pkgs.hostPlatform.system}.iso";
+  };
+
+  bios-cdrom = makeBootTest "bios-cdrom" {
+    cdrom = "${iso}/iso/nixos-installer-${pkgs.hostPlatform.system}.iso";
+  };
+
+  bios-usb = makeBootTest "bios-usb" {
+    usb = "${iso}/iso/nixos-installer-${pkgs.hostPlatform.system}.iso";
+  };
+}
diff --git a/nix/installer.nix b/nix/installer.nix
index 9e2e325..740567a 100644
--- a/nix/installer.nix
+++ b/nix/installer.nix
@@ -30,7 +30,8 @@
     pkgs.jq
     # for copying extra files of nixos-anywhere
     pkgs.rsync
-  ];
+    # alternative to nixos-generate-config
+  ] ++ lib.optional (pkgs.lib.versionAtLeast lib.version "24.11") pkgs.nixos-facter;
 
   imports = [
     ./nix-settings.nix
diff --git a/nix/kexec-installer/test.nix b/nix/kexec-installer/test.nix
index 6abac33..72360aa 100644
--- a/nix/kexec-installer/test.nix
+++ b/nix/kexec-installer/test.nix
@@ -3,14 +3,7 @@
 , kexecTarball
 }:
 
-let
-  makeTest = import (pkgs.path + "/nixos/tests/make-test-python.nix");
-  makeTest' = args: makeTest args {
-    inherit pkgs;
-    inherit (pkgs) system;
-  };
-in
-makeTest' {
+pkgs.testers.runNixOSTest {
   name = "kexec-installer";
   meta = with pkgs.lib.maintainers; {
     maintainers = [ mic92 ];