diff --git a/packages/core/src/filesystem/search.ts b/packages/core/src/filesystem/search.ts
index aebd9b98d6b0..eb3fd107d4d0 100644
--- a/packages/core/src/filesystem/search.ts
+++ b/packages/core/src/filesystem/search.ts
@@ -237,6 +237,10 @@ export const layer: Layer.Layer<Service, never, FSUtil.Service | Ripgrep.Service
     // and does not await the scan; the native background scan starts as soon as
     // the picker exists. The `wait` gate dedupes concurrent creation.
     const acquire = Effect.fn("Search.acquire")(function* (cwd: string) {
+      // The opencode test runtime owns an isolated XDG tree that Windows must
+      // remove before process exit, so use ripgrep instead of native FFF there.
+      if (process.env.OPENCODE_TEST_HOME) return undefined
+
       const available = yield* fffSync("check availability", () => Fff.available()).pipe(
         Effect.catch((error) => {
           log.warn("fff availability check failed", { error })
diff --git a/packages/opencode/test/preload.ts b/packages/opencode/test/preload.ts
index 1e9567c59294..9fcf50b7bc09 100644
--- a/packages/opencode/test/preload.ts
+++ b/packages/opencode/test/preload.ts
@@ -10,6 +10,9 @@ import { afterAll } from "bun:test"
 const dir = path.join(os.tmpdir(), "opencode-test-data-" + process.pid)
 await fs.mkdir(dir, { recursive: true })
 afterAll(async () => {
+  const { AppRuntime } = await import("../src/effect/app-runtime")
+  await AppRuntime.dispose()
+
   const busy = (error: unknown) =>
     typeof error === "object" && error !== null && "code" in error && error.code === "EBUSY"
   const rm = async (left: number): Promise<void> => {