From f3e1a21137cfc4099bb66de1ba34b0111200f6d9 Mon Sep 17 00:00:00 2001
From: Brian Warner <warner@lothar.com>
Date: Fri, 22 Mar 2024 17:21:04 -0700
Subject: [PATCH] fix(swingset): force flaky GC test to use XS only

Sometimes, for reasons we don't entirely understand, Node.js doesn't
garbage-collect objects when we tell it to, and we get flaky
GC-checking tests. This applies our usual fix, which is to only run
those tests under XS.

It also stops attempting to use `test.serial` as a workaround.

refs #3240
refs #5575
fixes #9089
---
 packages/SwingSet/test/test-gc-kernel.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/SwingSet/test/test-gc-kernel.js b/packages/SwingSet/test/test-gc-kernel.js
index 24ef843353ea..2ceecabd9ed0 100644
--- a/packages/SwingSet/test/test-gc-kernel.js
+++ b/packages/SwingSet/test/test-gc-kernel.js
@@ -1172,14 +1172,14 @@ test('terminated vat', async t => {
 });
 
 // device receives object from vat a, returns to vat b
-
-test.serial('device transfer', async t => {
+test('device transfer', async t => {
   function vatpath(fn) {
     return {
       sourceSpec: new URL(`gc-device-transfer/${fn}`, import.meta.url).pathname,
     };
   }
   const config = {
+    defaultManagerType: 'xs-worker', // Avoid local vat nondeterminism
     vats: {
       bootstrap: vatpath('bootstrap-gc.js'),
       left: vatpath('vat-left-gc.js'),