From 20756e0ee45885db5614dab1867f16cea70ca1ec Mon Sep 17 00:00:00 2001
From: Luke Parker <10430890+Hona@users.noreply.github.com>
Date: Wed, 22 Apr 2026 18:17:35 +1000
Subject: [PATCH] test: fix cross-spawn stderr race on Windows CI (#23808)

---
 packages/opencode/test/effect/cross-spawn-spawner.test.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/opencode/test/effect/cross-spawn-spawner.test.ts b/packages/opencode/test/effect/cross-spawn-spawner.test.ts
index 5990635aa2..201d998667 100644
--- a/packages/opencode/test/effect/cross-spawn-spawner.test.ts
+++ b/packages/opencode/test/effect/cross-spawn-spawner.test.ts
@@ -169,7 +169,10 @@ describe("cross-spawn spawner", () => {
             'process.stderr.write("stderr\\n", done)',
           ].join("\n"),
         )
-        const [stdout, stderr] = yield* Effect.all([decodeByteStream(handle.stdout), decodeByteStream(handle.stderr)])
+        const [stdout, stderr] = yield* Effect.all(
+          [decodeByteStream(handle.stdout), decodeByteStream(handle.stderr)],
+          { concurrency: 2 },
+        )
         expect(stdout).toBe("stdout")
         expect(stderr).toBe("stderr")
       }),