diff --git a/nixos/modules/system/boot/loader/grub/memtest.nix b/nixos/modules/system/boot/loader/grub/memtest.nix
index ee969e9bff5b..8e68431ac571 100644
--- a/nixos/modules/system/boot/loader/grub/memtest.nix
+++ b/nixos/modules/system/boot/loader/grub/memtest.nix
@@ -1,12 +1,10 @@
-# This module adds Memtest86+/Memtest86 to the GRUB boot menu.
-
+# This module adds Memtest86+ to the GRUB boot menu.
 { config, lib, pkgs, ... }:
 
 with lib;
 
 let
   memtest86 = pkgs.memtest86plus;
-  efiSupport = config.boot.loader.grub.efiSupport;
   cfg = config.boot.loader.grub.memtest86;
 in
 
@@ -19,11 +17,8 @@ in
         default = false;
         type = types.bool;
         description = lib.mdDoc ''
-          Make Memtest86+ (or MemTest86 if EFI support is enabled),
-          a memory testing program, available from the
-          GRUB boot menu. MemTest86 is an unfree program, so
-          this requires `allowUnfree` to be set to
-          `true`.
+          Make Memtest86+, a memory testing program, available from the GRUB
+          boot menu.
         '';
       };
 
@@ -63,34 +58,12 @@ in
     };
   };
 
-  config = mkMerge [
-    (mkIf (cfg.enable && efiSupport) {
-      assertions = [
-        {
-          assertion = cfg.params == [];
-          message = "Parameters are not available for MemTest86";
-        }
-      ];
-
-      boot.loader.grub.extraFiles = {
-        "memtest86.efi" = "${pkgs.memtest86-efi}/BOOTX64.efi";
-      };
-
-      boot.loader.grub.extraEntries = ''
-        menuentry "Memtest86" {
-          chainloader /memtest86.efi
-        }
-      '';
-    })
-
-    (mkIf (cfg.enable && !efiSupport) {
-      boot.loader.grub.extraEntries = ''
-        menuentry "Memtest86+" {
-          linux16 @bootRoot@/memtest.bin ${toString cfg.params}
-        }
-      '';
-
-      boot.loader.grub.extraFiles."memtest.bin" = "${memtest86}/memtest.bin";
-    })
-  ];
+  config = mkIf cfg.enable {
+    boot.loader.grub.extraEntries = ''
+      menuentry "Memtest86+" {
+        linux @bootRoot@/memtest.bin ${toString cfg.params}
+      }
+    '';
+    boot.loader.grub.extraFiles."memtest.bin" = "${memtest86}/memtest.bin";
+  };
 }
diff --git a/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix b/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
index 8a3e89e5888b..1770f0759434 100644
--- a/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
+++ b/nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix
@@ -32,7 +32,7 @@ let
 
     inherit (config.system.nixos) distroName;
 
-    memtest86 = optionalString cfg.memtest86.enable pkgs.memtest86-efi;
+    memtest86 = optionalString cfg.memtest86.enable pkgs.memtest86plus;
 
     netbootxyz = optionalString cfg.netbootxyz.enable pkgs.netbootxyz-efi;
 
@@ -147,10 +147,8 @@ in {
         default = false;
         type = types.bool;
         description = lib.mdDoc ''
-          Make MemTest86 available from the systemd-boot menu. MemTest86 is a
-          program for testing memory.  MemTest86 is an unfree program, so
-          this requires `allowUnfree` to be set to
-          `true`.
+          Make MemTest86+ available from the systemd-boot menu. MemTest86+ is a
+          program for testing memory.
         '';
       };
 
@@ -193,8 +191,8 @@ in {
       default = {};
       example = literalExpression ''
         { "memtest86.conf" = '''
-          title MemTest86
-          efi /efi/memtest86/memtest86.efi
+          title MemTest86+
+          efi /efi/memtest86/memtest.efi
         '''; }
       '';
       description = lib.mdDoc ''
@@ -213,7 +211,7 @@ in {
       type = types.attrsOf types.path;
       default = {};
       example = literalExpression ''
-        { "efi/memtest86/memtest86.efi" = "''${pkgs.memtest86-efi}/BOOTX64.efi"; }
+        { "efi/memtest86/memtest.efi" = "''${pkgs.memtest86plus}/memtest.efi"; }
       '';
       description = lib.mdDoc ''
         A set of files to be copied to {file}`/boot`.
@@ -276,11 +274,8 @@ in {
     boot.loader.supportsInitrdSecrets = true;
 
     boot.loader.systemd-boot.extraFiles = mkMerge [
-      # TODO: This is hard-coded to use the 64-bit EFI app, but it could probably
-      # be updated to use the 32-bit EFI app on 32-bit systems.  The 32-bit EFI
-      # app filename is BOOTIA32.efi.
       (mkIf cfg.memtest86.enable {
-        "efi/memtest86/BOOTX64.efi" = "${pkgs.memtest86-efi}/BOOTX64.efi";
+        "efi/memtest86/memtest.efi" = "${pkgs.memtest86plus.efi}";
       })
       (mkIf cfg.netbootxyz.enable {
         "efi/netbootxyz/netboot.xyz.efi" = "${pkgs.netbootxyz-efi}";
@@ -291,7 +286,7 @@ in {
       (mkIf cfg.memtest86.enable {
         "${cfg.memtest86.entryFilename}" = ''
           title  MemTest86
-          efi    /efi/memtest86/BOOTX64.efi
+          efi    /efi/memtest86/memtest.efi
         '';
       })
       (mkIf cfg.netbootxyz.enable {
diff --git a/nixos/tests/systemd-boot.nix b/nixos/tests/systemd-boot.nix
index 84a4da5aa6ec..c1f8637989e3 100644
--- a/nixos/tests/systemd-boot.nix
+++ b/nixos/tests/systemd-boot.nix
@@ -118,14 +118,11 @@ in
     nodes.machine = { pkgs, lib, ... }: {
       imports = [ common ];
       boot.loader.systemd-boot.memtest86.enable = true;
-      nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
-        "memtest86-efi"
-      ];
     };
 
     testScript = ''
       machine.succeed("test -e /boot/loader/entries/memtest86.conf")
-      machine.succeed("test -e /boot/efi/memtest86/BOOTX64.efi")
+      machine.succeed("test -e /boot/efi/memtest86/memtest.efi")
     '';
   };
 
@@ -152,15 +149,12 @@ in
       imports = [ common ];
       boot.loader.systemd-boot.memtest86.enable = true;
       boot.loader.systemd-boot.memtest86.entryFilename = "apple.conf";
-      nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
-        "memtest86-efi"
-      ];
     };
 
     testScript = ''
       machine.fail("test -e /boot/loader/entries/memtest86.conf")
       machine.succeed("test -e /boot/loader/entries/apple.conf")
-      machine.succeed("test -e /boot/efi/memtest86/BOOTX64.efi")
+      machine.succeed("test -e /boot/efi/memtest86/memtest.efi")
     '';
   };