diff --git a/packages/cli/test/acp/lifecycle.subprocess.test.ts b/packages/cli/test/acp/lifecycle.subprocess.test.ts
index ffd0332620..745c3e03f7 100644
--- a/packages/cli/test/acp/lifecycle.subprocess.test.ts
+++ b/packages/cli/test/acp/lifecycle.subprocess.test.ts
@@ -10,7 +10,9 @@ import { createAcpFixture, expectOk, initialize, newSession, selectConfigOption
 describe("acp lifecycle subprocess", () => {
   test("stdin EOF exits cleanly", async () => {
     await using fixture = await createAcpFixture()
-    expect(await fixture.spawn().close()).toBe(0)
+    const acp = fixture.spawn()
+    await initialize(acp)
+    expect(await acp.close()).toBe(0)
   }, 60_000)
 
   test("close capability and close request", async () => {
diff --git a/packages/cli/test/acp/subprocess.ts b/packages/cli/test/acp/subprocess.ts
index 0cb274658a..79afd1b152 100644
--- a/packages/cli/test/acp/subprocess.ts
+++ b/packages/cli/test/acp/subprocess.ts
@@ -322,7 +322,7 @@ function spawnAcp(input: { readonly env: Record<string, string | undefined> }):
         inputClosed = true
         await child.stdin.end()
       }
-      const exitCode = await withTimeout(child.exited, 45_000, "ACP did not exit after stdin EOF")
+      const exitCode = await withTimeout(child.exited, 5_000, "ACP did not exit after stdin EOF")
       await Promise.all([output, errors])
       if (exitCode !== 0) throw new Error(`ACP exited with ${exitCode}: ${stderr}`)
       return exitCode