diff --git a/nixos/tests/keycloak.nix b/nixos/tests/keycloak.nix
index 8fbab8ffae21..baed9419061d 100644
--- a/nixos/tests/keycloak.nix
+++ b/nixos/tests/keycloak.nix
@@ -20,6 +20,8 @@ let
 
       nodes = {
         keycloak = { config, ... }: {
+          virtualisation.memorySize = 2047;
+
           security.pki.certificateFiles = [
             certs.ca.cert
           ];