diff --git a/nixos/tests/web-apps/mastodon.nix b/nixos/tests/web-apps/mastodon.nix
index 05cc727476d6..2e7549460a3d 100644
--- a/nixos/tests/web-apps/mastodon.nix
+++ b/nixos/tests/web-apps/mastodon.nix
@@ -56,6 +56,9 @@ in
     };
 
     server = { pkgs, ... }: {
+
+      virtualisation.memorySize = 2048;
+
       networking = {
         interfaces.eth1 = {
           ipv4.addresses = [