diff --git a/nixos/tests/gitlab.nix b/nixos/tests/gitlab.nix
index f401fe098dcc..16e0dd723ecf 100644
--- a/nixos/tests/gitlab.nix
+++ b/nixos/tests/gitlab.nix
@@ -8,7 +8,7 @@ import ./make-test.nix ({ pkgs, lib, ...} : with lib; {
 
   nodes = {
     gitlab = { ... }: {
-      virtualisation.memorySize = 2047;
+      virtualisation.memorySize = if pkgs.stdenv.is64bit then 4096 else 2047;
       systemd.services.gitlab.serviceConfig.Restart = mkForce "no";
       systemd.services.gitlab-workhorse.serviceConfig.Restart = mkForce "no";
       systemd.services.gitaly.serviceConfig.Restart = mkForce "no";