diff --git a/deployment/check/data-model-tf-proxmox/nixosTest.nix b/deployment/check/data-model-tf-proxmox/nixosTest.nix
index 7574b4fa..dad9a93e 100644
--- a/deployment/check/data-model-tf-proxmox/nixosTest.nix
+++ b/deployment/check/data-model-tf-proxmox/nixosTest.nix
@@ -97,7 +97,7 @@ in
         ipAddress = "192.168.1.1";
       };
       virtualisation = {
-        diskSize = 24 * 1024;
+        diskSize = 5 * 1024;
         memorySize = 3 * 1024;
       };
     };