diff --git a/nixos/tests/gitea.nix b/nixos/tests/gitea.nix
index c38aad1f44ec..4e6f9c79a6f9 100644
--- a/nixos/tests/gitea.nix
+++ b/nixos/tests/gitea.nix
@@ -30,7 +30,7 @@ let
 
     nodes = {
       server = { config, pkgs, ... }: {
-        virtualisation.memorySize = 2048;
+        virtualisation.memorySize = 2047;
         services.gitea = {
           enable = true;
           database = { inherit type; };