diff --git a/testing/default.nix b/testing/default.nix
index 1c1a431..db20f20 100644
--- a/testing/default.nix
+++ b/testing/default.nix
@@ -57,6 +57,8 @@ let
         };
         masterAddress = "${master.config.networking.hostName}.${master.config.networking.domain}";
       };
+
+      systemd.extraConfig = "DefaultLimitNOFILE=1048576";
     }
     (mkIf (any (role: role == "master") config.services.kubernetes.roles) {
       networking.firewall.allowedTCPPorts = [