From 87109e5fb5e17d7ddab672c34f2af3f09b223580 Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Wed, 13 May 2026 06:26:33 +0100
Subject: [PATCH] test: dedupe anthropic vertex mock reads

---
 extensions/anthropic-vertex/stream-runtime.test.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/extensions/anthropic-vertex/stream-runtime.test.ts b/extensions/anthropic-vertex/stream-runtime.test.ts
index 6e249347ade..0a0290848f7 100644
--- a/extensions/anthropic-vertex/stream-runtime.test.ts
+++ b/extensions/anthropic-vertex/stream-runtime.test.ts
@@ -45,7 +45,7 @@ const CACHE_BOUNDARY_PROMPT = `Stable prefix${SYSTEM_PROMPT_CACHE_BOUNDARY}Dynam
 type PayloadHook = (payload: unknown, payloadModel: unknown) => Promise<unknown>;
 
 function streamAnthropicCall(streamAnthropicMock: ReturnType<typeof vi.fn>): unknown[] {
-  const call = streamAnthropicMock.mock.calls.at(0);
+  const call = streamAnthropicMock.mock.calls[0];
   if (!call) {
     throw new Error("Expected streamAnthropic call");
   }
@@ -55,7 +55,7 @@ function streamAnthropicCall(streamAnthropicMock: ReturnType<typeof vi.fn>): unk
 function streamTransportOptions(
   streamAnthropicMock: ReturnType<typeof vi.fn>,
 ): Record<string, unknown> {
-  const options = streamAnthropicCall(streamAnthropicMock).at(2);
+  const options = streamAnthropicCall(streamAnthropicMock)[2];
   if (!options || typeof options !== "object") {
     throw new Error("Expected streamAnthropic transport options");
   }