diff --git a/nixos/lib/testing/default.nix b/nixos/lib/testing/default.nix
index 7fdd454c22b8..7d511619e32d 100644
--- a/nixos/lib/testing/default.nix
+++ b/nixos/lib/testing/default.nix
@@ -9,13 +9,15 @@ let
     };
   runTest =
     module:
-    (evalTest (
-      { config, ... }:
-      {
-        imports = [ module ];
-        result = config.test;
-      }
-    )).config.result;
+    # Infra issue: virtualization on darwin doesn't seem to work yet.
+    lib.addMetaAttrs { hydraPlatforms = lib.platforms.linux; }
+      (evalTest (
+        { config, ... }:
+        {
+          imports = [ module ];
+          result = config.test;
+        }
+      )).config.result;
 
   testModules = [
     ./call-test.nix
diff --git a/nixos/lib/testing/meta.nix b/nixos/lib/testing/meta.nix
index 0a4c89ed4b06..6c6cfc49f141 100644
--- a/nixos/lib/testing/meta.nix
+++ b/nixos/lib/testing/meta.nix
@@ -36,7 +36,9 @@ in
           };
           platforms = lib.mkOption {
             type = types.listOf types.raw;
-            default = lib.platforms.linux ++ lib.platforms.darwin;
+            # darwin could be added, but it would add VM tests that don't work on Hydra.nixos.org (so far)
+            # see https://github.com/NixOS/nixpkgs/pull/303597#issuecomment-2128782362
+            default = lib.platforms.linux;
             description = ''
               Sets the [`meta.platforms`](https://nixos.org/manual/nixpkgs/stable/#var-meta-platforms) attribute on the [{option}`test`](#test-opt-test) derivation.
             '';